hello world from initrd

Makefile

@@ -18,16 +18,15 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
 
-CROSS = arm-none-eabi-
+CROSS = arm-stmos-
 CC = gcc
 AS = as
 OBJCOPY = objcopy
 
 MCUFLAGS = -mthumb -mcpu=cortex-m4 #-mfloat-abi=hard -mfpu=fpv4-sp-d16
-AFLAGS = $(MCUFLAGS) 
-CFLAGS = $(MCUFLAGS) -ggdb -ffreestanding -nostdlib -fsigned-char -I.. \
+AFLAGS = $(MCUFLAGS) -meabi=5
+CFLAGS = $(MCUFLAGS) -ggdb -fsigned-char -I.. \
 	-Wall -Werror -Wextra -pedantic
-	#-Wno-overlength-strings -Wno-discarded-qualifiers
 LFLAGS = -T link.ld 
 
 OUT = main.elf
@@ -46,6 +45,9 @@ all:
 	@$(CROSS)$(CC) $(CFLAGS) $(LFLAGS) -o $(OUT) \
 		$$(find src/fs src/kernel src/user -name "*.o") initrd.img.o
 
+crt:
+	@arm-stmos-$(CC) $(MCUFLAGS) -fsigned-char -Os -fPIE -c src/crt/crt0.c \
+		-o src/crt/crt0.o
 
 clean:
 	@echo "  CLEAN"
@@ -53,4 +55,5 @@ clean:
 	@$(MAKE) -C src/fs clean
 	@$(MAKE) -C src/user clean
 	@rm -f $(OUT)
+	@rm -f initrd.img initrd.img.o
 

initrd/Makefile

@@ -1,6 +1,12 @@
+##
+# A simple Makefile for building executables loadable by stmos.
+#
+
+ARCH = arm-stmos-
+CC = gcc -mcpu=cortex-m4 -mthumb -fsigned-char
+CFLAGS = -Os -fPIE
+
 all:
-	@arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -fsigned-char -Os \
-		-nostdinc -nostdlib \
-		-fdata-sections -ffunction-sections -Wl,--gc-sections \
-		-I../src/pdclib/include -I../src/pdclib/platform/stmos/include \
-		test.c ../src/pdclib/pdclib.a -s -o test
+	@$(ARCH)$(CC) $(CFLAGS) init.c -o init
+	@arm-stmos-strip init
+

initrd/hello

@@ -1 +0,0 @@
-Hello, world!!

initrd/init.c

@@ -0,0 +1,14 @@
+/**
+ * @file test.c
+ * Basic userland code to be loaded by stmos for program load testing.
+ */
+
+#include <stdio.h>
+
+int main(void)
+{
+	printf("Hello, world!\n");
+	while (1);
+	return 0;
+}
+

initrd/test.c

@@ -1,16 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-
-int main(void);
-
-void _start(void)
-{
-	exit(main());
-}
-
-int main(void)
-{
-	printf("Hello, world!\n");
-	return 0;
-}
-

link.ld

@@ -1,5 +1,6 @@
 /**
  * @file linker.ld
+ * Linker script for the kernel/os
  *
  * Copyright (C) 2018 Clyne Sullivan
  *

run.sh

@@ -1,5 +1,4 @@
 #!/bin/bash
-#
 # @file run.sh
 # Starts openocd and connects gdb to the target, for programming/debugging
 #

src/crt/Makefile

@@ -0,0 +1,42 @@
+##
+# @file Makefile
+# Script to build folder of source files
+#
+# Copyright (C) 2018 Clyne Sullivan
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+CFILES = $(wildcard *.c)
+AFILES = $(wildcard *.s) 
+OFILES = $(patsubst %.c, %.o, $(CFILES)) \
+	 $(patsubst %.s, %.asm.o, $(AFILES))
+
+CFLAGS += -ffreestanding -nostdlib -I.. -I../arch/cmsis
+
+all: $(OFILES)
+
+%.o: %.c
+	@echo "  CC     " $<
+	@$(CROSS)$(CC) $(CFLAGS) -c $< -o $@
+
+%.asm.o: %.s
+	@echo "  AS     " $<
+	@$(CROSS)$(AS) $(AFLAGS) -c $< -o $@
+
+clean:
+	@echo "  CLEAN"
+	@rm -f $(OFILES)
+
+

src/crt/crt0.c

@@ -0,0 +1,60 @@
+/**
+ * @file crt0.c
+ * Userland executable startup code
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+extern int main(int, char **);
+
+static void stdio_init(void);
+
+void _start(void)
+{
+	stdio_init();
+	exit(main(0, 0));
+}
+
+void stdio_init(void)
+{
+	stderr = calloc(1, sizeof(FILE));
+	stderr->handle = 2;
+	stderr->buffer = malloc(BUFSIZ);
+	stderr->bufsize = BUFSIZ;
+	stderr->ungetbuf = malloc(_PDCLIB_UNGETCBUFSIZE);
+	stderr->status = _IOLBF | _PDCLIB_FWRITE | _PDCLIB_STATIC;
+	stderr->next = NULL;
+
+	stdout = calloc(1, sizeof(FILE));
+	stdout->handle = 1;
+	stdout->buffer = malloc(BUFSIZ);
+	stdout->bufsize = BUFSIZ;
+	stdout->ungetbuf = malloc(_PDCLIB_UNGETCBUFSIZE);
+	stdout->status = _IOLBF | _PDCLIB_FWRITE | _PDCLIB_STATIC;
+	stdout->next = stderr;
+
+	stdin = calloc(1, sizeof(FILE));
+	stdin->handle = 0;
+	stdin->buffer = malloc(BUFSIZ);
+	stdin->bufsize = BUFSIZ;
+	stdin->ungetbuf = malloc(_PDCLIB_UNGETCBUFSIZE);
+	stdin->status = _IOLBF | _PDCLIB_FREAD | _PDCLIB_STATIC;
+	stdin->next = stdout;
+}
+

src/fs/Makefile

@@ -1,9 +1,29 @@
+##
+# @file Makefile
+# Script to build folder of source files
+#
+# Copyright (C) 2018 Clyne Sullivan
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
 CFILES = $(wildcard *.c)
 AFILES = $(wildcard *.s) 
 OFILES = $(patsubst %.c, %.o, $(CFILES)) \
 	 $(patsubst %.s, %.asm.o, $(AFILES))
 
-CFLAGS += -I.. -I../arch/cmsis
+CFLAGS += -ffreestanding -nostdlib -I.. -I../arch/cmsis
 
 all: $(OFILES)
 

src/fs/initrd.c

@@ -1,3 +1,23 @@
+/**
+ * @file initrd.c
+ * Filesystem module for handling the initrd
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include <stdint.h>
 
 #include <kernel/heap.h>
@@ -5,7 +25,6 @@
 
 typedef struct {
 	char *address;
-	uint32_t pos;
 	uint32_t size;
 } initrd_info;
 
@@ -16,8 +35,9 @@ static const uint8_t *initrd_start = (uint8_t *)_binary_initrd_img_start;
 static const uint32_t initrd_size = (uint32_t)_binary_initrd_img_size;
 
 void *initrd_open(const char *file);
-uint32_t initrd_read(void *info, uint32_t count, uint8_t *buffer);
-int initrd_close(void *info);
+uint32_t initrd_read(vfs_file_info *info, uint32_t count, uint8_t *buffer);
+int initrd_close(vfs_file_info *info);
+int initrd_seek(vfs_file_info *info, uint32_t offset, int whence);
 
 char *initrd_getfile(uint32_t offset);
 
@@ -26,7 +46,8 @@ static const vfs_volume_funcs initrd_funcs = {
 	initrd_close,
 	initrd_read,
 	0, // write
-	0  // readdir
+	0, // readdir
+	initrd_seek
 };
 
 int initrd_strncmp(const char *a, const char *b, unsigned int n)
@@ -53,7 +74,6 @@ void *initrd_open(const char *file)
 			initrd_info *file = (initrd_info *)malloc(
 				sizeof(initrd_info));
 			file->address = ptr + len + 8;
-			file->pos = 0;
 			file->size = *(uint32_t *)(ptr + len + 4);
 			return file;
 		}
@@ -62,41 +82,48 @@ void *initrd_open(const char *file)
 	return 0;
 }
 
-int initrd_close(void *info)
+int initrd_close(vfs_file_info *info)
 {
 	// Nothing to do
-	free(info);
+	free(info->fsinfo);
 	return 0;
 }
 
-uint32_t initrd_read(void *info, uint32_t count, uint8_t *buffer)
+uint32_t initrd_read(vfs_file_info *info, uint32_t count, uint8_t *buffer)
 {
-	initrd_info *iinfo = (initrd_info *)info;
+	initrd_info *iinfo = (initrd_info *)info->fsinfo;
 	if (iinfo == 0 || iinfo->address == 0)
 		return 0;
 	
 	uint32_t i;
 	for (i = 0; i < count; i++) {
-		if (iinfo->pos >= iinfo->size)
+		if (info->pos >= iinfo->size)
 			break;
 
-		buffer[iinfo->pos] = iinfo->address[iinfo->pos];
-		iinfo->pos++;
+		buffer[info->pos] = iinfo->address[info->pos];
+		info->pos++;
 	}
 
 	return i;
 }
 
-/*char *readfile(const char *name)
+int initrd_seek(vfs_file_info *info, uint32_t offset, int whence)
 {
-	char *ptr;
-	for (uint32_t i = 0; ptr = getfile(i), ptr != 0; i++) {
-		uint32_t len = *((uint32_t *)ptr);
-		if (!strncmp(name, ptr + 4, len))
-			return ptr + len + 8;
-	}
+	initrd_info *iinfo = (initrd_info *)info->fsinfo;
+	if (iinfo == 0 || iinfo->address == 0)
+		return 0;
+
+	if (whence == SEEK_SET)
+		info->pos = offset;
+	else if (whence == SEEK_CUR)
+		info->pos += offset;
+	else if (whence == SEEK_END)
+		info->pos = iinfo->size + offset;
+	else
+		return -1;
+
 	return 0;
-}*/
+}
 
 char *initrd_getfile(uint32_t offset)
 {

src/fs/initrd.h

@@ -1,6 +1,29 @@
+/**
+ * @file initrd.h
+ * Filesystem module for handling the initrd
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #ifndef INTIRD_H_
 #define INITRD_H_
 
+/**
+ * Mounts the initrd (initrd is built into kernel).
+ */
 void initrd_init(void);
 
 #endif // INITRD_H_

src/fs/stdio.c

@@ -1,12 +1,32 @@
+/**
+ * @file stdio.c
+ * Filesystem module for handling stdio (stdout, stdin, stderr)
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "stdio.h"
 
 #include <kernel/heap.h>
 #include <kernel/serial.h>
 
 void *stdio_open(const char *path);
-int stdio_close(void *info);
-uint32_t stdio_read(void *info, uint32_t count, uint8_t *buffer);
-uint32_t stdio_write(void *info, uint32_t count, const uint8_t *buffer);
+int stdio_close(vfs_file_info *info);
+uint32_t stdio_read(vfs_file_info *info, uint32_t count, uint8_t *buffer);
+uint32_t stdio_write(vfs_file_info *info, uint32_t count, const uint8_t *buffer);
 
 const vfs_volume_funcs stdio_funcs = {
 	stdio_open,
@@ -14,6 +34,7 @@ const vfs_volume_funcs stdio_funcs = {
 	stdio_read,
 	stdio_write,
 	0, // readdir
+	0  // seek
 };
 
 void *stdio_open(const char *path)
@@ -30,14 +51,14 @@ void *stdio_open(const char *path)
 	return id;
 }
 
-int stdio_close(void *info)
+int stdio_close(vfs_file_info *info)
 {
 	// Nothing to do
-	free(info);
+	free(info->fsinfo);
 	return 0;
 }
 
-uint32_t stdio_read(void *info, uint32_t count, uint8_t *buffer)
+uint32_t stdio_read(vfs_file_info *info, uint32_t count, uint8_t *buffer)
 {
 	(void)info;
 	(void)count;
@@ -45,11 +66,11 @@ uint32_t stdio_read(void *info, uint32_t count, uint8_t *buffer)
 	return 0;
 }
 
-uint32_t stdio_write(void *info, uint32_t count, const uint8_t *buffer)
+uint32_t stdio_write(vfs_file_info *info, uint32_t count, const uint8_t *buffer)
 {
 	(void)info;
 	for (uint32_t i = 0; i < count; i++)
-		serial_put(buffer[count]);
+		serial_put(buffer[i]);
 	return count;
 }
 

src/fs/stdio.h

@@ -1,8 +1,31 @@
+/**
+ * @file stdio.h
+ * Filesystem module for handling stdio (stdout, stdin, stderr)
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #ifndef INTIRD_H_
 #define INITRD_H_
 
 #include <kernel/vfs.h>
 
+/**
+ * Structure of function calls for stdio filesystem operations.
+ */
 extern const vfs_volume_funcs stdio_funcs;
 
 #endif // INITRD_H_

src/kernel/Makefile

@@ -1,9 +1,29 @@
+##
+# @file Makefile
+# Script to build folder of source files
+#
+# Copyright (C) 2018 Clyne Sullivan
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
 CFILES = $(wildcard *.c)
 AFILES = $(wildcard *.s) 
 OFILES = $(patsubst %.c, %.o, $(CFILES)) \
 	 $(patsubst %.s, %.asm.o, $(AFILES))
 
-CFLAGS += -I.. -I../arch/cmsis
+CFLAGS += -ffreestanding -nostdlib -I.. -I../arch/cmsis
 
 all: $(OFILES)
 

src/kernel/clock.c

@@ -23,20 +23,18 @@
 #include <arch/stm/stm32l476xx.h>
 
 // ticks since init
-volatile uint32_t ticks = 0;
+volatile uint32_t clock_ticks = 0;
 
 volatile uint8_t tim2_finished = 1;
 
-extern task_t *current;
-
 void clock_svc(uint32_t *args)
 {
 	if (args[0] == 0)
 		task_sleep(args[1]);
 	else if (args[0] == 1)
-		udelay(args[1]);
+		clock_udelay(args[1]);
 	else if (args[0] == 2)
-		*((unsigned int *)args[1]) = ticks;
+		*((unsigned int *)args[1]) = clock_millis();
 }
 
 void clock_init(void)
@@ -79,18 +77,13 @@ void clock_init(void)
 	TIM2->CR1 |= TIM_CR1_OPM | TIM_CR1_CEN;
 }
 
-uint32_t millis(void)
-{
-	return ticks;
-}
-
-void delay(uint32_t count)
+void clock_delay(uint32_t count)
 {
-	uint32_t target = ticks + count;
-	while (ticks < target);
+	uint32_t target = clock_ticks + count;
+	while (clock_ticks < target);
 }
 
-void udelay(uint32_t count)
+void clock_udelay(uint32_t count)
 {
 	tim2_finished = 0;
 	TIM2->ARR = count;
@@ -98,13 +91,18 @@ void udelay(uint32_t count)
 	while (tim2_finished == 0);
 }
 
+uint32_t clock_millis(void)
+{
+	return clock_ticks;
+}
+
 void SysTick_Handler(void)
 {
 	// just keep counting
-	ticks++;
+	clock_ticks++;
 
 	// task switch every four ticks (4ms)
-	if (!(ticks & 3))
+	if (!(clock_ticks & 3))
 		SCB->ICSR |= SCB_ICSR_PENDSVSET_Msk;
 }
 

src/kernel/clock.h

@@ -28,18 +28,22 @@
  */
 extern void clock_init(void);
 
-uint32_t millis(void);
-
 /**
  * Sleeps for given amount of milliseconds.
  * @param ms Number of milliseconds to sleep for
  */
-void delay(uint32_t ms);
+void clock_delay(uint32_t ms);
 
 /**
  * Sleeps for the given amount of microseconds.
  * @param count Number of microseconds to sleep for
  */
-void udelay(uint32_t count);
+void clock_udelay(uint32_t count);
+
+/**
+ * Returns the number of milliseconds since clock initialization.
+ * @return milliseconds since init
+ */
+uint32_t clock_millis(void);
 
 #endif // CLOCK_H_

src/kernel/elf.c

@@ -0,0 +1,136 @@
+/**
+ * @file elf.c
+ * Functionality to execute ELF files
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "elf.h"
+#include "vfs.h"
+#include "heap.h"
+
+#include <string.h>
+
+Elf32_Shdr *elf_find_section(Elf32_Ehdr *ehdr, const char *name)
+{
+	Elf32_Shdr *shdr = (Elf32_Shdr *)((char *)ehdr + ehdr->e_shoff);
+	Elf32_Shdr *shdr_str = (Elf32_Shdr *)((char *)ehdr + ehdr->e_shoff +
+		ehdr->e_shstrndx * ehdr->e_shentsize);
+
+	for (Elf32_Half i = 0; i < ehdr->e_shnum; i++) {
+		char *section = ((char *)ehdr + shdr_str->sh_offset) +
+			shdr->sh_name;
+		if (!strcmp(section, name))
+			return shdr;
+
+		shdr = (Elf32_Shdr *)((char *)shdr + ehdr->e_shentsize);
+	}
+
+	return 0;
+}
+
+uint32_t elf_execve(const char *file, char * const argv[], char * const envp[])
+{
+	(void)argv;
+	(void)envp;
+
+	// Open the given file
+	int fd = vfs_open(file, VFS_FILE_READ);
+	if (fd == -1)
+		return -1;
+
+	// Get file size
+	vfs_seek(fd, 0, SEEK_END);
+	unsigned int fileLength = vfs_tell(fd);
+	vfs_seek(fd, 0, SEEK_SET);
+
+	// Read entire file
+	char *elfData = malloc(fileLength);
+	if (vfs_read(fd, fileLength, (uint8_t *)elfData) != fileLength) {
+		vfs_close(fd);
+		free(elfData);
+		return -1;
+	}
+
+	// ELF signature check
+	if (elfData[0] != '\177' || elfData[1] != 'E' || elfData[2] != 'L' ||
+		elfData[3] != 'F') {
+		vfs_close(fd);
+		free(elfData);
+		return -1;
+	}
+
+
+	uint32_t ELF_OFFSET = 0;
+
+	// Load program headers
+	Elf32_Ehdr *ehdr = (Elf32_Ehdr *)elfData;
+	Elf32_Phdr *phdr = (Elf32_Phdr *)(elfData + ehdr->e_phoff);
+
+	for (Elf32_Half i = 0; i < ehdr->e_phnum; i++) {
+		if (phdr->p_type == PT_LOAD) {
+			// There should only be one PT_LOAD section...
+			if (ELF_OFFSET != 0)
+				while (1);
+			ELF_OFFSET = (uint32_t)malloc(phdr->p_memsz + 8) & ~7;
+
+			uint8_t *src = (uint8_t *)elfData + phdr->p_offset;
+			uint8_t *dst = (uint8_t *)(ELF_OFFSET + phdr->p_vaddr);
+			for (uint32_t j = 0; j < phdr->p_filesz; j++)
+				dst[j] = src[j];
+		}
+
+		phdr = (Elf32_Phdr *)((char *)phdr + ehdr->e_phentsize);
+	}
+
+	// Zero the .bss section
+	Elf32_Shdr *bssSection = elf_find_section(ehdr, ".bss");
+	if (bssSection != 0) {
+		uint32_t *bssArray = (Elf32_Addr *)(ELF_OFFSET + bssSection->sh_addr);
+		Elf32_Word bssSize = bssSection->sh_size / sizeof(void *);
+		for (Elf32_Word i = 0; i < bssSize; i++)
+			bssArray[i] = 0;
+	}
+
+	// Fix GOT entries if they exist
+	Elf32_Shdr *gotSection = elf_find_section(ehdr, ".got");
+	if (gotSection != 0) {
+		Elf32_Addr *gotArray = (Elf32_Addr *)(ELF_OFFSET + gotSection->sh_addr);
+		Elf32_Word gotSize = gotSection->sh_size / sizeof(void *);
+		for (Elf32_Word i = 0; i < gotSize; i++)
+			gotArray[i] += ELF_OFFSET;
+	}
+
+	// Run any constructors
+	Elf32_Shdr *initArraySection = elf_find_section(ehdr, ".init_array");
+	if (initArraySection != 0) {
+		Elf32_Addr *initArray = (Elf32_Addr *)(ELF_OFFSET +
+			initArraySection->sh_addr);
+	
+		Elf32_Word initArraySize = initArraySection->sh_size / sizeof(void *);
+		for (Elf32_Word i = 0; i < initArraySize; i++) {
+			initArray[i] += ELF_OFFSET;
+			((void (*)(void))(initArray[i]))();
+		}
+	}
+
+	vfs_close(fd);
+	free(elfData);
+
+	// Return entry point
+	return (ELF_OFFSET + ehdr->e_entry);
+}
+

src/kernel/elf.h

@@ -0,0 +1,124 @@
+/**
+ * @file elf.h
+ * Functionality to execute ELF files
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef ELF_H_
+#define ELF_H_
+
+#include <stdint.h>
+
+/**
+ * Attempts to open the given ELF file.
+ * @param file Path of the ELF file
+ * @param argv argv to be passed to the program
+ * @param envp envp to be passed to the program
+ * @return -1 on fail, otherwise returns address of ELF entry
+ */
+uint32_t elf_execve(const char *file, char * const argv[], char * const envp[]);
+
+//
+// ELF Standard macros and structures below
+
+#define EI_NIDENT 16
+
+#define PT_NULL     0
+#define PT_LOAD     1
+#define PT_DYNAMIC  2
+#define PT_INTERP   3
+#define PT_NOTE     4
+#define PT_SHLIB    5
+#define PT_PHDR     6
+#define PT_RESERVED 0x70000000
+
+#define ELF32_ST_BIND(i)    ((i) >> 4)
+#define ELF32_ST_TYPE(i)    ((i) & 0xF)
+#define ELF32_ST_INFO(b, t) (((b) << 4) + ((t) & 0xF))
+
+#define ELF32_R_SYM(i)     ((i) >> 8)
+#define ELF32_R_TYPE(i)    ((i) & 0xFF)
+#define ELF32_R_INFO(s, t) (((s) << 8) + ((t) & 0xFF))
+
+typedef uint32_t Elf32_Addr;
+typedef uint16_t Elf32_Half;
+typedef uint32_t Elf32_Off;
+typedef uint32_t Elf32_Sword;
+typedef uint32_t Elf32_Word;
+
+typedef struct {
+	unsigned char e_ident[EI_NIDENT];
+	Elf32_Half    e_type;
+	Elf32_Half    e_machine;
+	Elf32_Word    e_version;
+	Elf32_Addr    e_entry;
+	Elf32_Off     e_phoff;
+	Elf32_Off     e_shoff;
+	Elf32_Word    e_flags;
+	Elf32_Half    e_ehsize;
+	Elf32_Half    e_phentsize;
+	Elf32_Half    e_phnum;
+	Elf32_Half    e_shentsize;
+	Elf32_Half    e_shnum;
+	Elf32_Half    e_shstrndx;
+} __attribute__((packed)) Elf32_Ehdr;
+
+typedef struct {
+	Elf32_Word sh_name;
+	Elf32_Word sh_type;
+	Elf32_Word sh_flags;
+	Elf32_Addr sh_addr;
+	Elf32_Off  sh_offset;
+	Elf32_Word sh_size;
+	Elf32_Word sh_link;
+	Elf32_Word sh_info;
+	Elf32_Word sh_addralign;
+	Elf32_Word sh_entsize;
+} __attribute__((packed)) Elf32_Shdr;
+
+typedef struct {
+	Elf32_Word    st_name;
+	Elf32_Addr    st_value;
+	Elf32_Word    st_size;
+	unsigned char st_info;
+	unsigned char st_other;
+	Elf32_Half    st_shndx;
+} __attribute__((packed)) Elf32_Sym;
+
+typedef struct {
+	Elf32_Addr r_offset;
+	Elf32_Word r_info;
+} __attribute__((packed)) Elf32_Rel;
+
+typedef struct {
+	Elf32_Addr  r_offset;
+	Elf32_Word  r_info;
+	Elf32_Sword r_addend;
+} __attribute__((packed)) Elf32_Rela;
+
+typedef struct {
+	Elf32_Word p_type;
+	Elf32_Off  p_offset;
+	Elf32_Addr p_vaddr;
+	Elf32_Addr p_paddr;
+	Elf32_Word p_filesz;
+	Elf32_Word p_memsz;
+	Elf32_Word p_flags;
+	Elf32_Word p_align;
+} __attribute__((packed)) Elf32_Phdr;
+
+#endif // ELF_H_

src/kernel/fault.c

@@ -1,5 +1,26 @@
+/**
+ * @file fault.c
+ * Fault managing functions
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 __attribute__ ((naked))
 void HardFault_Handler(void)
 {
+	// TODO have a real fault handler...
 	while (1);
 }

src/kernel/init.c

@@ -63,5 +63,5 @@ void init_idle(void)
 	task_start(user_main, 4096);
 
 	while (1)
-		delay(10);
+		clock_delay(10);
 }

src/kernel/serial.c

@@ -44,7 +44,7 @@ void serial_put(int c)
 char serial_get(void)
 {
 	while (!(USART2->ISR & USART_ISR_RXNE))
-		delay(10);
+		clock_delay(10);
 	return USART2->RDR & 0xFF;
 }
 

src/kernel/svc.c

@@ -1,6 +1,6 @@
 /**
  * @file svc.c
- * An unused handler for SVC calls
+ * Handler code for SVC calls
  *
  * Copyright (C) 2018 Clyne Sullivan
  *
@@ -48,6 +48,7 @@ void SVC_Handler(void) {
 		 * 2 - getpid
 		 * 3 - waitpid
 		 * 4 - sbrk (TODO bad)
+		 * 5 - execve
 		 */
 		task_svc(args);
 		break;

src/kernel/task.c

@@ -19,6 +19,7 @@
  */
 
 #include "clock.h"
+#include "elf.h"
 #include "heap.h"
 #include "task.h"
 #include <arch/stm/stm32l476xx.h>
@@ -49,6 +50,10 @@ void task_svc(uint32_t *args)
 	case 4:
 		*((void **)args[2]) = task_sbrk(args[1]);
 		break;
+	case 5:
+		*((uint32_t *)args[4]) = elf_execve((const char *)args[1],
+			(char * const *)args[2], (char * const *)args[3]);
+		break;
 	default:
 		break;
 	}
@@ -56,18 +61,19 @@ void task_svc(uint32_t *args)
 
 void *task_sbrk(uint32_t bytes)
 {
-	if (task_current->heap == 0) {
+	return malloc(bytes);
+
+	/*if (task_current->heap == 0)
 		task_current->heap = malloc(1024 * 16);
-		return (uint8_t *)task_current->heap + (1024 * 16);
-	}
 
 	if (bytes == 0) {
 		alloc_t *alloc = (alloc_t *)((uint8_t *)task_current->heap -
 			sizeof(alloc_t));
-		return (uint8_t *)task_current->heap + alloc->size;
+		return (uint8_t *)(((uint32_t)task_current->heap + alloc->size)
+			& ~0xFFF);
 	}
 
-	return (void *)-1;
+	return (void *)-1;*/
 }
 
 void task_hold(uint8_t hold)
@@ -81,7 +87,7 @@ void task_hold(uint8_t hold)
 void task_sleep(uint32_t ms)
 {
 	task_current->status.state = TASK_SLEEPING;
-	task_current->status.value = millis() + ms;
+	task_current->status.value = clock_millis() + ms;
 	YIELD;
 }
 
@@ -312,7 +318,7 @@ void PendSV_Handler(void)
 	" : "=r" (task_current->sp));
 
 	// Load next task
-	uint32_t ticks = millis();
+	uint32_t ticks = clock_millis();
 	do {
 		task_current = task_current->next;
 		if (task_current == 0)

src/kernel/vfs.c

@@ -1,3 +1,23 @@
+/**
+ * @file vfs.c
+ * An implementation of filesystem abstraction
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "vfs.h"
 
 #include <kernel/task.h>
@@ -10,6 +30,11 @@
 static vfs_volume vfs_volumes[VFS_MAX_VOLS];
 static vfs_file vfs_files[VFS_MAX_FILES];
 
+#define VFS_PID_CHECK(fpid) { \
+	uint32_t pid = task_getpid(); \
+	if (pid != fpid && fpid != 0) \
+		return 0; }
+
 void vfs_svc(uint32_t *args)
 {
 	switch (args[0]) {
@@ -114,7 +139,8 @@ int vfs_open(const char *path, uint32_t flags)
 	vfs_files[file].flags = VFS_FILE_OPEN | flags;
 	vfs_files[file].vol = drive;
 	vfs_files[file].pid = task_getpid();
-	vfs_files[file].fsinfo = fsinfo;
+	vfs_files[file].info.pos = 0;
+	vfs_files[file].info.fsinfo = fsinfo;
 
 	return file;
 }
@@ -125,14 +151,13 @@ int vfs_close(int fd)
 		return -1;
 	if (vfs_volumes[vfs_files[fd].vol].funcs->close == 0)
 		return -1;
-	if (vfs_files[fd].pid != task_getpid())
-		return -1;
+	VFS_PID_CHECK(vfs_files[fd].pid);
 	if (!(vfs_files[fd].flags & VFS_FILE_OPEN))
 		return 0;
 
 	// TODO care
 	/*int ret =*/ vfs_volumes[vfs_files[fd].vol].funcs->close(
-		vfs_files[fd].fsinfo);
+		&vfs_files[fd].info);
 
 	vfs_files[fd].flags = 0;
 	vfs_files[fd].pid = 0;
@@ -143,16 +168,17 @@ uint32_t vfs_read(int fd, uint32_t count, uint8_t *buffer)
 {
 	if (fd < 0 || fd > VFS_MAX_FILES || count == 0 || buffer == 0)
 		return 0;
+	if (!(vfs_files[fd].flags & VFS_FILE_OPEN))
+		return -1;
 	if (vfs_volumes[vfs_files[fd].vol].funcs->read == 0)
 		return -1;
-	if (vfs_files[fd].pid != task_getpid())
-		return 0;
+	VFS_PID_CHECK(vfs_files[fd].pid);
 	if ((!(vfs_files[fd].flags & VFS_FILE_READ)) || (vfs_files[fd].flags &
 		VFS_EOF))
 		return 0;
 
 	uint32_t ret = vfs_volumes[vfs_files[fd].vol].funcs->read(
-		vfs_files[fd].fsinfo, count, buffer);
+		&vfs_files[fd].info, count, buffer);
 
 	if (ret < count)
 		vfs_files[fd].flags |= VFS_EOF;
@@ -164,17 +190,18 @@ uint32_t vfs_write(int fd, uint32_t count, const uint8_t *buffer)
 {
 	if (fd < 0 || fd > VFS_MAX_FILES || count == 0 || buffer == 0)
 		return 0;
+	if (!(vfs_files[fd].flags & VFS_FILE_OPEN))
+		return -1;
 	if (vfs_volumes[vfs_files[fd].vol].funcs->write == 0)
 		return -1;
-	if (vfs_files[fd].pid != task_getpid())
-		return 0;
+	VFS_PID_CHECK(vfs_files[fd].pid);
 	// TODO append?
 	if ((!(vfs_files[fd].flags & VFS_FILE_WRITE)) || (vfs_files[fd].flags &
 		VFS_EOF))
 		return 0;
 
 	uint32_t ret = vfs_volumes[vfs_files[fd].vol].funcs->write(
-		vfs_files[fd].fsinfo, count, buffer);
+		&vfs_files[fd].info, count, buffer);
 
 	if (ret < count)
 		vfs_files[fd].flags |= VFS_EOF;
@@ -182,3 +209,28 @@ uint32_t vfs_write(int fd, uint32_t count, const uint8_t *buffer)
 	return ret;
 }
 
+int vfs_seek(int fd, int32_t offset, int whence)
+{
+	if (fd < 0 || fd > VFS_MAX_FILES)
+		return -1;
+	if (!(vfs_files[fd].flags & VFS_FILE_OPEN))
+		return -1;
+	if (vfs_volumes[vfs_files[fd].vol].funcs->seek == 0)
+		return -1;
+	VFS_PID_CHECK(vfs_files[fd].pid);
+
+	return vfs_volumes[vfs_files[fd].vol].funcs->seek(&vfs_files[fd].info,
+		offset, whence);
+}
+
+int32_t vfs_tell(int fd)
+{
+	if (fd < 0 || fd > VFS_MAX_FILES)
+		return -1;
+	if (!(vfs_files[fd].flags & VFS_FILE_OPEN))
+		return -1;
+	VFS_PID_CHECK(vfs_files[fd].pid);
+
+	return (int32_t)vfs_files[fd].info.pos;
+}
+

src/kernel/vfs.h

@@ -1,18 +1,95 @@
+/**
+ * @file vfs.h
+ * An implementation of filesystem abstraction
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #ifndef VFS_H_
 #define VFS_H_
 
 #include <stdint.h>
 
+/**
+ * Holds file info that can be used by filesystem drivers/modules.
+ */
+typedef struct {
+	uint32_t pos;   /**< Position within the file */
+	void *fsinfo;   /**< Filesystem-specific data, handled by fs driver */
+} vfs_file_info;
+
+/**
+ * Directory entry data, used by readdir.
+ */
 typedef struct {
 	char name[32];
 } vfs_dirent;
 
+/**
+ * Functions that a filesystem driver/module should implement.
+ */
 typedef struct vfs_volume_funcs_t {
+	/**
+	 * Opens the given file.
+	 * @param file Path to the file
+	 * @return 0 on fail, otherwise pointer to be stored in
+	 *         vfs_file_info.fsinfo
+	 */
 	void *(*open)(const char *file);
-	int (*close)(void *info);
-	uint32_t (*read)(void *info, uint32_t count, uint8_t *buffer);
-	uint32_t (*write)(void *info, uint32_t count, const uint8_t *buffer);
+
+	/**
+	 * Closes the file, releasing given info however necessary.
+	 * @param info File info
+	 * @return 0 on success, non-zero on failure
+	 */
+	int (*close)(vfs_file_info *info);
+
+	/**
+	 * Reads bytes from the given file.
+	 * @param info Info on the file
+	 * @param count Number of bytes to read
+	 * @param buffer Pre-allocated buffer to store data to
+	 * @return Number of bytes read
+	 */
+	uint32_t (*read)(vfs_file_info *info, uint32_t count, uint8_t *buffer);
+
+	/**
+	 * Writes bytes from the given file.
+	 * @param info Info on the file
+	 * @param count Number of bytes to write
+	 * @param buffer Data to write to file
+	 * @return Number of bytes written
+	 */
+	uint32_t (*write)(vfs_file_info *info, uint32_t count, const uint8_t *buffer);
+
+	/**
+	 * Creates an array of vfs_dirent for the given directory.
+	 * @param path Directory to read
+	 * @return 0 on fail, an array of vfs_dirent otherwise
+	 */
 	vfs_dirent *(*readdir)(const char *path);
+
+	/**
+	 * Seeks file to the given position.
+	 * @param info The file's info
+	 * @param offset Offset to seek to
+	 * @param whence Where to seek from (beginning, end, or current pos.)
+	 * @return 0 on succes, non-zero otherwise
+	 */
+	int (*seek)(vfs_file_info *info, uint32_t offset, int whence);
 } vfs_volume_funcs;
 
 // Indicates mounted volume
@@ -20,9 +97,12 @@ typedef struct vfs_volume_funcs_t {
 // Set if filesystem is read-only
 #define VFS_READONLY (1 << 1)
 
+/**
+ * Data defining a VFS volume.
+ */
 typedef struct {
-	uint32_t flags;
-	const vfs_volume_funcs *funcs;
+	uint32_t flags;                /**< Flags regarding volume state */
+	const vfs_volume_funcs *funcs; /**< Volume-managing functions */
 } vfs_volume;
 
 // Indicates an opened file
@@ -34,13 +114,19 @@ typedef struct {
 // Set if EOF has been reached
 #define VFS_EOF        (1 << 3)
 
+/**
+ * Contains data to manage open files.
+ */
 typedef struct {
-	uint32_t flags; /**< File attribute flags */
-	uint32_t vol;   /**< Index of volume file is stored on */
-	uint32_t pid;   /**< PID of process handling this file */
-	void *fsinfo;   /**< Filesystem-specific data, handled by fs driver */
+	uint32_t flags;     /**< File attribute flags */
+	uint32_t vol;       /**< Index of volume file is stored on */
+	uint32_t pid;       /**< PID of process handling this file */
+	vfs_file_info info; /**< File info used by file IO functions */
 } vfs_file;
 
+/**
+ * Initializes the filesystem abstraction layer.
+ */
 void vfs_init(void);
 
 int vfs_mount(const vfs_volume_funcs *funcs, uint32_t flags);
@@ -49,4 +135,11 @@ int vfs_close(int fd);
 uint32_t vfs_read(int fd, uint32_t count, uint8_t *buffer);
 uint32_t vfs_write(int fd, uint32_t count, const uint8_t *buffer);
 
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+
+int vfs_seek(int fd, int32_t offset, int whence);
+int32_t vfs_tell(int fd);
+
 #endif // VFS_H_

src/pdclib/Makefile

@@ -24,10 +24,10 @@ REGDEPFILES := $(patsubst %,$(BUILDDIR)/%.d,$(REGFILES))
 # All files belonging to the source distribution
 ALLFILES := $(SRCFILES) $(HDRFILES) $(AUXFILES)
 
-CC = arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -fsigned-char --specs=nosys.specs
+CC = arm-stmos-gcc -mcpu=cortex-m4 -mthumb -fsigned-char
 
 WARNINGS := -Wall -Wextra -pedantic -Wno-unused-parameter -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wnested-externs -Winline -Wno-long-long -Wuninitialized -Wstrict-prototypes -Wdeclaration-after-statement
-CFLAGS := -fno-builtin -g -std=c99 -I./testing -I./platform/stmos/include $(WARNINGS) $(USERFLAGS)
+CFLAGS := -fPIC -Os -ffreestanding -std=c99 -I./testing -I./platform/stmos/include $(WARNINGS) $(USERFLAGS)
 
 .PHONY: all clean srcdist tests testdrivers regtests regtestdrivers todos fixmes help
 

src/pdclib/platform/example/Readme.txt

@@ -1,21 +0,0 @@
-"Example" Platform Overlay
-==========================
-
-This is an example platform overlay, as described in the main Readme.txt of
-this archive. For ease of development, it applies (and tests) correctly on the
-machine of the author; no other guarantees can be given.
-It should give you a good idea of what is REQUIRED to make a copy of PDCLib
-work. There is a lot more you could do, and even some things you SHOULD do, in
-order to experience anything but abysmal performance:
-
-- Read / write operations on binary streams, and even on text streams for
-  machines that do not do any text conversion, can be made much more efficient
-  by using some sort of page buffer instead of the linear buffer implemented
-  here. It requires some special and platform-dependent manipulations, though,
-  which is why it is not done by default.
-
-- Anything relating to floating point logic is written in generic C. While
-  this is (hopefully) highly portable and should get you started on your
-  platform of choice, it is also highly inefficient and should be replaced by
-  inline assembly. Just make sure that your assembly keeps all the promises
-  the C library makes.

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_Exit.c

@@ -1,40 +0,0 @@
-/* _PDCLIB_exit( int )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_exit() fit for use with POSIX
-   kernels.
-*/
-
-#include <stdlib.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-extern void _exit( int status ) _PDCLIB_NORETURN;
-
-void _PDCLIB_Exit( int status )
-{
-    _exit( status );
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-#ifndef REGTEST
-    int UNEXPECTED_RETURN = 0;
-    _PDCLIB_Exit( 0 );
-    TESTCASE( UNEXPECTED_RETURN );
-#endif
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB__Exit.c

@@ -1,40 +0,0 @@
-/* _PDCLIB_exit( int )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_exit() fit for use with POSIX
-   kernels.
-*/
-
-#include <stdlib.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-extern void _exit( int status ) _PDCLIB_NORETURN;
-
-void _PDCLIB_Exit( int status )
-{
-    _exit( status );
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-#ifndef REGTEST
-    int UNEXPECTED_RETURN = 0;
-    _PDCLIB_Exit( 0 );
-    TESTCASE( UNEXPECTED_RETURN );
-#endif
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_allocpages.c

@@ -1,86 +0,0 @@
-/* _PDCLIB_allocpages( int const )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_allocpages() fit for use with
-   POSIX kernels.
-*/
-
-#include <stdint.h>
-#include <stddef.h>
-
-#ifndef REGTEST
-
-int brk( void * );
-void * sbrk( intptr_t );
-
-#include "pdclib/_PDCLIB_glue.h"
-
-static void * membreak = NULL;
-
-void * _PDCLIB_allocpages( int const n )
-{
-    void * oldbreak;
-    if ( membreak == NULL )
-    {
-        /* first call, make sure end-of-heap is page-aligned */
-        intptr_t unaligned = 0;
-        membreak = sbrk( 0 );
-        unaligned = _PDCLIB_PAGESIZE - (intptr_t)membreak % _PDCLIB_PAGESIZE;
-        if ( unaligned < _PDCLIB_PAGESIZE )
-        {
-            /* end-of-heap not page-aligned - adjust */
-            if ( sbrk( unaligned ) != membreak )
-            {
-                /* error */
-                return NULL;
-            }
-            membreak = (char *)membreak + unaligned;
-        }
-    }
-    /* increasing or decreasing heap - standard operation */
-    oldbreak = membreak;
-    membreak = (void *)( (char *)membreak + ( n * _PDCLIB_PAGESIZE ) );
-#ifdef __CYGWIN__
-    if ( sbrk( (char*)membreak - (char*)oldbreak ) == membreak )
-#else
-    if ( brk( membreak ) == 0 )
-#endif
-    {
-        /* successful */
-        return oldbreak;
-    }
-    else
-    {
-        /* out of memory */
-        membreak = oldbreak;
-        return NULL;
-    }
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-#ifndef REGTEST
-    char * startbreak = sbrk( 0 );
-    TESTCASE( _PDCLIB_allocpages( 0 ) );
-    TESTCASE( ( (char *)sbrk( 0 ) - startbreak ) <= _PDCLIB_PAGESIZE );
-    startbreak = sbrk( 0 );
-    TESTCASE( _PDCLIB_allocpages( 1 ) );
-    TESTCASE( sbrk( 0 ) == startbreak + ( 1 * _PDCLIB_PAGESIZE ) );
-    TESTCASE( _PDCLIB_allocpages( 5 ) );
-    TESTCASE( sbrk( 0 ) == startbreak + ( 6 * _PDCLIB_PAGESIZE ) );
-    TESTCASE( _PDCLIB_allocpages( -3 ) );
-    TESTCASE( sbrk( 0 ) == startbreak + ( 3 * _PDCLIB_PAGESIZE ) );
-#endif
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_close.c

@@ -1,36 +0,0 @@
-/* _PDCLIB_close( _PDCLIB_fd_t )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_close() fit for use with POSIX
-   kernels.
-*/
-
-#include <stdio.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-extern int close( int fd );
-
-int _PDCLIB_close( int fd )
-{
-    return close( fd );
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    /* No testdriver; tested in driver for _PDCLIB_open(). */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_fillbuffer.c

@@ -1,78 +0,0 @@
-/* _PDCLIB_fillbuffer( struct _PDCLIB_file_t * )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_fillbuffer() fit for
-   use with POSIX kernels.
-*/
-
-#include <stdio.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-#include </usr/include/errno.h>
-
-typedef long ssize_t;
-extern ssize_t read( int fd, void * buf, size_t count );
-
-int _PDCLIB_fillbuffer( struct _PDCLIB_file_t * stream )
-{
-    /* No need to handle buffers > INT_MAX, as PDCLib doesn't allow them */
-    ssize_t rc = read( stream->handle, stream->buffer, stream->bufsize );
-    if ( rc > 0 )
-    {
-        /* Reading successful. */
-        if ( ! ( stream->status & _PDCLIB_FBIN ) )
-        {
-            /* TODO: Text stream conversion here */
-        }
-        stream->pos.offset += rc;
-        stream->bufend = rc;
-        stream->bufidx = 0;
-        return 0;
-    }
-    if ( rc < 0 )
-    {
-        /* Reading error */
-        switch ( errno )
-        {
-            /* See comments on implementation-defined errno values in
-               <_PDCLIB_config.h>.
-            */
-            case EBADF:
-            case EFAULT:
-            case EINTR:
-            case EINVAL:
-            case EIO:
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-            default:
-                /* This should be something like EUNKNOWN. */
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-        }
-        stream->status |= _PDCLIB_ERRORFLAG;
-        return EOF;
-    }
-    /* End-of-File */
-    stream->status |= _PDCLIB_EOFFLAG;
-    return EOF;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    /* Testing covered by ftell.c */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_flushbuffer.c

@@ -1,110 +0,0 @@
-/* _PDCLIB_flushbuffer( struct _PDCLIB_file_t * )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_flushbuffer() fit for
-   use with POSIX kernels.
-*/
-
-#include <stdio.h>
-#include <string.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-#include </usr/include/errno.h>
-
-typedef long ssize_t;
-extern ssize_t write( int fd, const void * buf, size_t count );
-
-/* The number of attempts to complete an output buffer flushing before giving
- *    up.
- *    */
-#define _PDCLIB_IO_RETRIES 1
-
-/* What the system should do after an I/O operation did not succeed, before   */
-/* trying again. (Empty by default.)                                          */
-#define _PDCLIB_IO_RETRY_OP( stream )
-
-int _PDCLIB_flushbuffer( struct _PDCLIB_file_t * stream )
-{
-    /* No need to handle buffers > INT_MAX, as PDCLib doesn't allow them */
-    _PDCLIB_size_t written = 0;
-    int rc;
-    unsigned int retries;
-    if ( ! ( stream->status & _PDCLIB_FBIN ) )
-    {
-        /* TODO: Text stream conversion here */
-    }
-    /* Keep trying to write data until everything is written, an error
-       occurs, or the configured number of retries is exceeded.
-    */
-    for ( retries = _PDCLIB_IO_RETRIES; retries > 0; --retries )
-    {
-        rc = (int)write( stream->handle, stream->buffer + written, stream->bufidx - written );
-        if ( rc < 0 )
-        {
-            /* Write error */
-            switch ( errno )
-            {
-                /* See <_PDCLIB_config.h>. There should be differenciated errno
-                   handling here, possibly even a 1:1 mapping; but that is up
-                   to the individual platform.
-                */
-                case EBADF:
-                case EFAULT:
-                case EFBIG:
-                case EINTR:
-                case EINVAL:
-                case EIO:
-                case ENOSPC:
-                case EPIPE:
-                    _PDCLIB_errno = _PDCLIB_ERROR;
-                    break;
-                default:
-                    /* This should be something like EUNKNOWN. */
-                    _PDCLIB_errno = _PDCLIB_ERROR;
-                    break;
-            }
-            stream->status |= _PDCLIB_ERRORFLAG;
-            /* Move unwritten remains to begin of buffer. */
-            stream->bufidx -= written;
-            memmove( stream->buffer, stream->buffer + written, stream->bufidx );
-            return EOF;
-        }
-        written += (_PDCLIB_size_t)rc;
-        stream->pos.offset += rc;
-        if ( written == stream->bufidx )
-        {
-            /* Buffer written completely. */
-            stream->bufidx = 0;
-            return 0;
-        }
-    }
-    /* Number of retries exceeded. You probably want a different errno value
-       here.
-    */
-    _PDCLIB_errno = _PDCLIB_ERROR;
-    stream->status |= _PDCLIB_ERRORFLAG;
-    /* Move unwritten remains to begin of buffer. */
-    stream->bufidx -= written;
-    memmove( stream->buffer, stream->buffer + written, stream->bufidx );
-    return EOF;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    /* Testing covered by ftell.c */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_open.c

@@ -1,167 +0,0 @@
-/* _PDCLIB_open( const char * const, int )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_open() fit for use with POSIX
-   kernels.
-*/
-
-#include <stdio.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "/usr/include/errno.h"
-
-int _PDCLIB_open( const char * const filename, unsigned int mode )
-{
-    /* This is an example implementation of _PDCLIB_open() fit for use with
-       POSIX kernels.
-    */
-    int osmode;
-    int rc;
-    switch ( mode & ( _PDCLIB_FREAD | _PDCLIB_FWRITE | _PDCLIB_FAPPEND | _PDCLIB_FRW ) )
-    {
-        case _PDCLIB_FREAD: /* "r" */
-            osmode = O_RDONLY;
-            break;
-        case _PDCLIB_FWRITE: /* "w" */
-            osmode = O_WRONLY | O_CREAT | O_TRUNC;
-            break;
-        case _PDCLIB_FAPPEND: /* "a" */
-            osmode = O_WRONLY | O_APPEND | O_CREAT;
-            break;
-        case _PDCLIB_FREAD | _PDCLIB_FRW: /* "r+" */
-            osmode = O_RDWR;
-            break;
-        case _PDCLIB_FWRITE | _PDCLIB_FRW: /* "w+" */
-            osmode = O_RDWR | O_CREAT | O_TRUNC;
-            break;
-        case _PDCLIB_FAPPEND | _PDCLIB_FRW: /* "a+" */
-            osmode = O_RDWR | O_APPEND | O_CREAT;
-            break;
-        default: /* Invalid mode */
-            return -1;
-    }
-    if ( osmode & O_CREAT )
-    {
-        rc = open( filename, osmode, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH );
-    }
-    else
-    {
-        rc = open( filename, osmode );
-    }
-    if ( rc == -1 )
-    {
-        switch ( errno )
-        {
-            /* See the comments on implementation-defined errno values in
-               <_PDCLIB_config.h>.
-            */
-            case EACCES:
-            case EFAULT:
-            case EINTR:
-            case EISDIR:
-            case ELOOP:
-            case EMFILE:
-            case ENAMETOOLONG:
-            case ENFILE:
-            case ENODEV:
-            case ENOENT:
-            case ENOMEM:
-            case ENOSPC:
-            case ENOTDIR:
-            case EOVERFLOW:
-            case EROFS:
-            case ETXTBSY:
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-            default:
-                /* This should be something like EUNKNOWN. */
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-        }
-    }
-    return rc;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-int main( void )
-{
-#ifndef REGTEST
-    /* This testdriver assumes POSIX, i.e. _PDCLIB_fd_t being int and being
-       incremented by one on each successful open.
-    */
-    int fh;
-    char buffer[ 10 ];
-    remove( testfile );
-    /* Trying to read non-existent file. */
-    TESTCASE( _PDCLIB_open( testfile, _PDCLIB_FREAD ) == _PDCLIB_NOHANDLE );
-    /* Writing to file, trying to read from it. */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FWRITE ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "test", 4 ) == 4 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 4 ) == -1 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Reading from file, trying to write to it. */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FREAD ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "test", 4 ) == -1 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Appending to file, trying to read from it. */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FAPPEND ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "app", 3 ) == 3 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 10 ) == -1 );
-    TESTCASE( write( fh, "end", 3 ) == 3 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Reading and writing from file ("r+"). */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FREAD | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( read( fh, buffer, 10 ) == 10 );
-    TESTCASE( memcmp( buffer, "testappend", 10 ) == 0 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( write( fh, "wedo", 4 ) == 4 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 10 ) == 10 );
-    TESTCASE( memcmp( buffer, "wedoappend", 10 ) == 0 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Writing and reading from file ("w+"). */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FWRITE | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "test", 4 ) == 4 );
-    TESTCASE( lseek( fh, 1, SEEK_SET ) == 1 );
-    TESTCASE( read( fh, buffer, 2 ) == 2 );
-    TESTCASE( memcmp( buffer, "es", 2 ) == 0 );
-    TESTCASE( write( fh, "sie", 3 ) == 3 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 6 ) == 6 );
-    TESTCASE( memcmp( buffer, "tessie", 6 ) == 0 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Appending and reading from file ("a+"). */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FAPPEND | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "baby", 4 ) == 4 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 10 ) == 10 );
-    TESTCASE( memcmp( buffer, "tessiebaby", 10 ) == 0 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Cleaning up. */
-    TESTCASE( remove( testfile ) == 0 );
-#endif
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_rename.c

@@ -1,144 +0,0 @@
-/* _PDCLIB_rename( const char *, const char * )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_rename() fit for use with
-   POSIX kernels.
- */
-
-#include <stdio.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-#include </usr/include/errno.h>
-
-extern int unlink( const char * pathname );
-extern int link( const char * old, const char * new );
-
-int _PDCLIB_rename( const char * old, const char * new )
-{
-    /* Note that the behaviour if new file exists is implementation-defined.
-       There is nothing wrong with either overwriting it or failing the
-       operation, but you might want to document whichever you chose.
-       This example fails if new file exists.
-    */
-    if ( link( old, new ) == 0 )
-    {
-        if ( unlink( old ) == EOF )
-        {
-            switch ( errno )
-            {
-                /* See the comments on implementation-defined errno values in
-                   <_PDCLIB_config.h>.
-                */
-                case EACCES:
-                case EFAULT:
-                case EIO:
-                case EISDIR:
-                case ELOOP:
-                case ENAMETOOLONG:
-                case ENOENT:
-                case ENOMEM:
-                case ENOTDIR:
-                case EPERM:
-                case EROFS:
-                    _PDCLIB_errno = _PDCLIB_ERROR;
-                    break;
-                default:
-                    /* This should be something like EUNKNOWN. */
-                    _PDCLIB_errno = _PDCLIB_ERROR;
-                    break;
-            }
-            return -1;
-        }
-        else
-        {
-            return 0;
-        }
-    }
-    else
-    {
-        switch ( errno )
-        {
-            /* See the comments on implementation-defined errno values in
-               <_PDCLIB_config.h>.
-            */
-            case EACCES:
-            case EEXIST:
-            case EFAULT:
-            case EIO:
-            case ELOOP:
-            case EMLINK:
-            case ENAMETOOLONG:
-            case ENOENT:
-            case ENOMEM:
-            case ENOSPC:
-            case ENOTDIR:
-            case EPERM:
-            case EROFS:
-            case EXDEV:
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-            default:
-                /* This should be something like EUNKNOWN. */
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-        }
-        return EOF;
-    }
-}
-
-#endif
-
-#ifdef TEST
-#include "_PDCLIB_test.h"
-
-#include <stdlib.h>
-
-int main( void )
-{
-#ifndef REGTEST
-    FILE * file;
-    remove( testfile1 );
-    remove( testfile2 );
-    /* check that neither file exists */
-    TESTCASE( fopen( testfile1, "r" ) == NULL );
-    TESTCASE( fopen( testfile2, "r" ) == NULL );
-    /* rename file 1 to file 2 - expected to fail */
-    TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == -1 );
-    /* create file 1 */
-    TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
-    TESTCASE( fputc( 'x', file ) == 'x' );
-    TESTCASE( fclose( file ) == 0 );
-    /* check that file 1 exists */
-    TESTCASE( ( file = fopen( testfile1, "r" ) ) != NULL );
-    TESTCASE( fclose( file ) == 0 );
-    /* rename file 1 to file 2 */
-    TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == 0 );
-    /* check that file 2 exists, file 1 does not */
-    TESTCASE( fopen( testfile1, "r" ) == NULL );
-    TESTCASE( ( file = fopen( testfile2, "r" ) ) != NULL );
-    TESTCASE( fclose( file ) == 0 );
-    /* create another file 1 */
-    TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
-    TESTCASE( fputc( 'x', file ) == 'x' );
-    TESTCASE( fclose( file ) == 0 );
-    /* check that file 1 exists */
-    TESTCASE( ( file = fopen( testfile1, "r" ) ) != NULL );
-    TESTCASE( fclose( file ) == 0 );
-    /* rename file 1 to file 2 - expected to fail, see comment in
-       _PDCLIB_rename() itself.
-    */
-    TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == -1 );
-    /* remove both files */
-    remove( testfile1 );
-    remove( testfile2 );
-#endif
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_seek.c

@@ -1,82 +0,0 @@
-/* int64_t _PDCLIB_seek( FILE *, int64_t, int )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of _PDCLIB_seek() fit for use with POSIX
-   kernels.
- */
-
-#include <stdio.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-#include "/usr/include/errno.h"
-
-extern _PDCLIB_int64_t lseek64( int fd, _PDCLIB_int64_t offset, int whence );
-extern long lseek( int fd, long offset, int whence );
-
-_PDCLIB_int64_t _PDCLIB_seek( struct _PDCLIB_file_t * stream, _PDCLIB_int64_t offset, int whence )
-{
-    _PDCLIB_int64_t rc;
-    switch ( whence )
-    {
-        case SEEK_SET:
-        case SEEK_CUR:
-        case SEEK_END:
-            /* EMPTY - OK */
-            break;
-        default:
-            /* See comments on implementation-defined errno values in
-               <_PDCLIB_config.h>.
-            */
-            _PDCLIB_errno = _PDCLIB_ERROR;
-            return EOF;
-            break;
-    }
-#ifdef __CYGWIN__
-    rc = lseek( stream->handle, offset, whence );
-#else
-    rc = lseek64( stream->handle, offset, whence );
-#endif
-    if ( rc != EOF )
-    {
-        stream->ungetidx = 0;
-        stream->bufidx = 0;
-        stream->bufend = 0;
-        stream->pos.offset = rc;
-        return rc;
-    }
-    switch ( errno )
-    {
-        case EBADF:
-        case EFAULT:
-            /* See comments on implementation-defined errno values in
-               <_PDCLIB_config.h>.
-            */
-            _PDCLIB_errno = _PDCLIB_ERROR;
-            break;
-        default:
-            /* This should be something like EUNKNOWN. */
-            _PDCLIB_errno = _PDCLIB_ERROR;
-            break;
-    }
-    return EOF;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    /* Testing covered by ftell.c */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/_PDCLIB/_PDCLIB_stdinit.c

@@ -1,430 +0,0 @@
-/* _PDCLIB_stdinit
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example initialization of stdin, stdout and stderr to the integer
-   file descriptors 0, 1, and 2, respectively. This applies for a great variety
-   of operating systems, including POSIX compliant ones.
-*/
-
-#include <stdio.h>
-#include <locale.h>
-#include <limits.h>
-
-#ifndef REGTEST
-
-/* In a POSIX system, stdin / stdout / stderr are equivalent to the (int) file
-   descriptors 0, 1, and 2 respectively.
-*/
-/* TODO: This is proof-of-concept, requires finetuning. */
-static char _PDCLIB_sin_buffer[BUFSIZ];
-static char _PDCLIB_sout_buffer[BUFSIZ];
-static char _PDCLIB_serr_buffer[BUFSIZ];
-
-static unsigned char _PDCLIB_sin_ungetbuf[_PDCLIB_UNGETCBUFSIZE];
-static unsigned char _PDCLIB_sout_ungetbuf[_PDCLIB_UNGETCBUFSIZE];
-static unsigned char _PDCLIB_serr_ungetbuf[_PDCLIB_UNGETCBUFSIZE];
-
-static struct _PDCLIB_file_t _PDCLIB_serr = { 2, _PDCLIB_serr_buffer, BUFSIZ, 0, 0, { 0, 0 }, 0, _PDCLIB_serr_ungetbuf, _IONBF | _PDCLIB_FWRITE | _PDCLIB_STATIC, NULL, NULL };
-static struct _PDCLIB_file_t _PDCLIB_sout = { 1, _PDCLIB_sout_buffer, BUFSIZ, 0, 0, { 0, 0 }, 0, _PDCLIB_sout_ungetbuf, _IOLBF | _PDCLIB_FWRITE | _PDCLIB_STATIC, NULL, &_PDCLIB_serr };
-static struct _PDCLIB_file_t _PDCLIB_sin  = { 0, _PDCLIB_sin_buffer, BUFSIZ, 0, 0, { 0, 0 }, 0, _PDCLIB_sin_ungetbuf, _IOLBF | _PDCLIB_FREAD | _PDCLIB_STATIC, NULL, &_PDCLIB_sout };
-
-struct _PDCLIB_file_t * stdin  = &_PDCLIB_sin;
-struct _PDCLIB_file_t * stdout = &_PDCLIB_sout;
-struct _PDCLIB_file_t * stderr = &_PDCLIB_serr;
-
-/* FIXME: This approach is a possible attack vector. */
-struct _PDCLIB_file_t * _PDCLIB_filelist = &_PDCLIB_sin;
-
-/* "C" locale - defaulting to ASCII-7.
-   1 kByte (+ 4 byte) of <ctype.h> data.
-   Each line: flags, lowercase, uppercase, collation.
-*/
-static struct _PDCLIB_lc_ctype_entry_t _ctype_entries[ _PDCLIB_CHARSET_SIZE + 1 ] = {
-    { /* EOF */    0,    0,    0 },
-    { /* NUL */ _PDCLIB_CTYPE_CNTRL,                                             0x00, 0x00 },
-    { /* SOH */ _PDCLIB_CTYPE_CNTRL,                                             0x01, 0x01 },
-    { /* STX */ _PDCLIB_CTYPE_CNTRL,                                             0x02, 0x02 },
-    { /* ETX */ _PDCLIB_CTYPE_CNTRL,                                             0x03, 0x03 },
-    { /* EOT */ _PDCLIB_CTYPE_CNTRL,                                             0x04, 0x04 },
-    { /* ENQ */ _PDCLIB_CTYPE_CNTRL,                                             0x05, 0x05 },
-    { /* ACK */ _PDCLIB_CTYPE_CNTRL,                                             0x06, 0x06 },
-    { /* BEL */ _PDCLIB_CTYPE_CNTRL,                                             0x07, 0x07 },
-    { /*  BS */ _PDCLIB_CTYPE_CNTRL,                                             0x08, 0x08 },
-    { /*  HT */ _PDCLIB_CTYPE_CNTRL | _PDCLIB_CTYPE_BLANK | _PDCLIB_CTYPE_SPACE, 0x09, 0x09 },
-    { /*  LF */ _PDCLIB_CTYPE_CNTRL | _PDCLIB_CTYPE_SPACE,                       0x0A, 0x0A },
-    { /*  VT */ _PDCLIB_CTYPE_CNTRL | _PDCLIB_CTYPE_SPACE,                       0x0B, 0x0B },
-    { /*  FF */ _PDCLIB_CTYPE_CNTRL | _PDCLIB_CTYPE_SPACE,                       0x0C, 0x0C },
-    { /*  CR */ _PDCLIB_CTYPE_CNTRL | _PDCLIB_CTYPE_SPACE,                       0x0D, 0x0D },
-    { /*  SO */ _PDCLIB_CTYPE_CNTRL,                                             0x0E, 0x0E },
-    { /*  SI */ _PDCLIB_CTYPE_CNTRL,                                             0x0F, 0x0F },
-    { /* DLE */ _PDCLIB_CTYPE_CNTRL,                                             0x10, 0x10 },
-    { /* DC1 */ _PDCLIB_CTYPE_CNTRL,                                             0x11, 0x11 },
-    { /* DC2 */ _PDCLIB_CTYPE_CNTRL,                                             0x12, 0x12 },
-    { /* DC3 */ _PDCLIB_CTYPE_CNTRL,                                             0x13, 0x13 },
-    { /* DC4 */ _PDCLIB_CTYPE_CNTRL,                                             0x14, 0x14 },
-    { /* NAK */ _PDCLIB_CTYPE_CNTRL,                                             0x15, 0x15 },
-    { /* SYN */ _PDCLIB_CTYPE_CNTRL,                                             0x16, 0x16 },
-    { /* ETB */ _PDCLIB_CTYPE_CNTRL,                                             0x17, 0x17 },
-    { /* CAN */ _PDCLIB_CTYPE_CNTRL,                                             0x18, 0x18 },
-    { /*  EM */ _PDCLIB_CTYPE_CNTRL,                                             0x19, 0x19 },
-    { /* SUB */ _PDCLIB_CTYPE_CNTRL,                                             0x1A, 0x1A },
-    { /* ESC */ _PDCLIB_CTYPE_CNTRL,                                             0x1B, 0x1B },
-    { /*  FS */ _PDCLIB_CTYPE_CNTRL,                                             0x1C, 0x1C },
-    { /*  GS */ _PDCLIB_CTYPE_CNTRL,                                             0x1D, 0x1D },
-    { /*  RS */ _PDCLIB_CTYPE_CNTRL,                                             0x1E, 0x1E },
-    { /*  US */ _PDCLIB_CTYPE_CNTRL,                                             0x1F, 0x1F },
-    { /*  SP */ _PDCLIB_CTYPE_BLANK | _PDCLIB_CTYPE_SPACE,                       0x20, 0x20 },
-    { /* '!' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x21, 0x21 },
-    { /* '"' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x22, 0x22 },
-    { /* '#' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x23, 0x23 },
-    { /* '$' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x24, 0x24 },
-    { /* '%' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x25, 0x25 },
-    { /* '&' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x26, 0x26 },
-    { /* ''' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x27, 0x27 },
-    { /* '(' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x28, 0x28 },
-    { /* ')' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x29, 0x29 },
-    { /* '*' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x2A, 0x2A },
-    { /* '+' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x2B, 0x2B },
-    { /* ',' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x2C, 0x2C },
-    { /* '-' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x2D, 0x2D },
-    { /* '.' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x2E, 0x2E },
-    { /* '/' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x2F, 0x2F },
-    { /* '0' */ _PDCLIB_CTYPE_GRAPH,                                             0x30, 0x30 },
-    { /* '1' */ _PDCLIB_CTYPE_GRAPH,                                             0x31, 0x31 },
-    { /* '2' */ _PDCLIB_CTYPE_GRAPH,                                             0x32, 0x32 },
-    { /* '3' */ _PDCLIB_CTYPE_GRAPH,                                             0x33, 0x33 },
-    { /* '4' */ _PDCLIB_CTYPE_GRAPH,                                             0x34, 0x34 },
-    { /* '5' */ _PDCLIB_CTYPE_GRAPH,                                             0x35, 0x35 },
-    { /* '6' */ _PDCLIB_CTYPE_GRAPH,                                             0x36, 0x36 },
-    { /* '7' */ _PDCLIB_CTYPE_GRAPH,                                             0x37, 0x37 },
-    { /* '8' */ _PDCLIB_CTYPE_GRAPH,                                             0x38, 0x38 },
-    { /* '9' */ _PDCLIB_CTYPE_GRAPH,                                             0x39, 0x39 },
-    { /* ':' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x3A, 0x3A },
-    { /* ';' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x3B, 0x3B },
-    { /* '<' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x3C, 0x3C },
-    { /* '=' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x3D, 0x3D },
-    { /* '>' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x3E, 0x3E },
-    { /* '?' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x3F, 0x3F },
-    { /* '@' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x40, 0x40 },
-    { /* 'A' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x41, 0x61 },
-    { /* 'B' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x42, 0x62 },
-    { /* 'C' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x43, 0x63 },
-    { /* 'D' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x44, 0x64 },
-    { /* 'E' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x45, 0x65 },
-    { /* 'F' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x46, 0x66 },
-    { /* 'G' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x47, 0x67 },
-    { /* 'H' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x48, 0x68 },
-    { /* 'I' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x49, 0x69 },
-    { /* 'J' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x4A, 0x6A },
-    { /* 'K' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x4B, 0x6B },
-    { /* 'L' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x4C, 0x6C },
-    { /* 'M' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x4D, 0x6D },
-    { /* 'N' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x4E, 0x6E },
-    { /* 'O' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x4F, 0x6F },
-    { /* 'P' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x50, 0x70 },
-    { /* 'Q' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x51, 0x71 },
-    { /* 'R' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x52, 0x72 },
-    { /* 'S' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x53, 0x73 },
-    { /* 'T' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x54, 0x74 },
-    { /* 'U' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x55, 0x75 },
-    { /* 'V' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x56, 0x76 },
-    { /* 'W' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x57, 0x77 },
-    { /* 'X' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x58, 0x78 },
-    { /* 'Y' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x59, 0x79 },
-    { /* 'Z' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_UPPER, 0x5A, 0x7A },
-    { /* '[' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x5B, 0x5B },
-    { /* '\' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x5C, 0x5C },
-    { /* ']' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x5D, 0x5D },
-    { /* '^' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x5E, 0x5E },
-    { /* '_' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x5F, 0x5F },
-    { /* '`' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x60, 0x60 },
-    { /* 'a' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x41, 0x61 },
-    { /* 'b' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x42, 0x62 },
-    { /* 'c' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x43, 0x63 },
-    { /* 'd' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x44, 0x64 },
-    { /* 'e' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x45, 0x65 },
-    { /* 'f' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x46, 0x66 },
-    { /* 'g' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x47, 0x67 },
-    { /* 'h' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x48, 0x68 },
-    { /* 'i' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x49, 0x69 },
-    { /* 'j' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x4A, 0x6A },
-    { /* 'k' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x4B, 0x6B },
-    { /* 'l' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x4C, 0x6C },
-    { /* 'm' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x4D, 0x6D },
-    { /* 'n' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x4E, 0x6E },
-    { /* 'o' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x4F, 0x6F },
-    { /* 'p' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x50, 0x70 },
-    { /* 'q' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x51, 0x71 },
-    { /* 'r' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x52, 0x72 },
-    { /* 's' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x53, 0x73 },
-    { /* 't' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x54, 0x74 },
-    { /* 'u' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x55, 0x75 },
-    { /* 'v' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x56, 0x76 },
-    { /* 'w' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x57, 0x77 },
-    { /* 'x' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x58, 0x78 },
-    { /* 'y' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x59, 0x79 },
-    { /* 'z' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_LOWER, 0x5A, 0x7A },
-    { /* '{' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x7B, 0x7B },
-    { /* '|' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x7C, 0x7C },
-    { /* '}' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x7D, 0x7D },
-    { /* '~' */ _PDCLIB_CTYPE_GRAPH | _PDCLIB_CTYPE_PUNCT,                       0x7E, 0x7E },
-    { /* DEL */ _PDCLIB_CTYPE_CNTRL,                                             0x7F, 0x7F },
-    { 0x00, 0x80, 0x80 },
-    { 0x00, 0x81, 0x81 },
-    { 0x00, 0x82, 0x82 },
-    { 0x00, 0x83, 0x83 },
-    { 0x00, 0x84, 0x84 },
-    { 0x00, 0x85, 0x85 },
-    { 0x00, 0x86, 0x86 },
-    { 0x00, 0x87, 0x87 },
-    { 0x00, 0x88, 0x88 },
-    { 0x00, 0x89, 0x89 },
-    { 0x00, 0x8A, 0x8A },
-    { 0x00, 0x8B, 0x8B },
-    { 0x00, 0x8C, 0x8C },
-    { 0x00, 0x8D, 0x8D },
-    { 0x00, 0x8E, 0x8E },
-    { 0x00, 0x8F, 0x8F },
-    { 0x00, 0x90, 0x90 },
-    { 0x00, 0x91, 0x91 },
-    { 0x00, 0x92, 0x92 },
-    { 0x00, 0x93, 0x93 },
-    { 0x00, 0x94, 0x94 },
-    { 0x00, 0x95, 0x95 },
-    { 0x00, 0x96, 0x96 },
-    { 0x00, 0x97, 0x97 },
-    { 0x00, 0x98, 0x98 },
-    { 0x00, 0x99, 0x99 },
-    { 0x00, 0x9A, 0x9A },
-    { 0x00, 0x9B, 0x9B },
-    { 0x00, 0x9C, 0x9C },
-    { 0x00, 0x9D, 0x9D },
-    { 0x00, 0x9E, 0x9E },
-    { 0x00, 0x9F, 0x9F },
-    { 0x00, 0xA0, 0xA0 },
-    { 0x00, 0xA1, 0xA1 },
-    { 0x00, 0xA2, 0xA2 },
-    { 0x00, 0xA3, 0xA3 },
-    { 0x00, 0xA4, 0xA4 },
-    { 0x00, 0xA5, 0xA5 },
-    { 0x00, 0xA6, 0xA6 },
-    { 0x00, 0xA7, 0xA7 },
-    { 0x00, 0xA8, 0xA8 },
-    { 0x00, 0xA9, 0xA9 },
-    { 0x00, 0xAA, 0xAA },
-    { 0x00, 0xAB, 0xAB },
-    { 0x00, 0xAC, 0xAC },
-    { 0x00, 0xAD, 0xAD },
-    { 0x00, 0xAE, 0xAE },
-    { 0x00, 0xAF, 0xAF },
-    { 0x00, 0xB0, 0xB0 },
-    { 0x00, 0xB1, 0xB1 },
-    { 0x00, 0xB2, 0xB2 },
-    { 0x00, 0xB3, 0xB3 },
-    { 0x00, 0xB4, 0xB4 },
-    { 0x00, 0xB5, 0xB5 },
-    { 0x00, 0xB6, 0xB6 },
-    { 0x00, 0xB7, 0xB7 },
-    { 0x00, 0xB8, 0xB8 },
-    { 0x00, 0xB9, 0xB9 },
-    { 0x00, 0xBA, 0xBA },
-    { 0x00, 0xBB, 0xBB },
-    { 0x00, 0xBC, 0xBC },
-    { 0x00, 0xBD, 0xBD },
-    { 0x00, 0xBE, 0xBE },
-    { 0x00, 0xBF, 0xBF },
-    { 0x00, 0xC0, 0xC0 },
-    { 0x00, 0xC1, 0xC1 },
-    { 0x00, 0xC2, 0xC2 },
-    { 0x00, 0xC3, 0xC3 },
-    { 0x00, 0xC4, 0xC4 },
-    { 0x00, 0xC5, 0xC5 },
-    { 0x00, 0xC6, 0xC6 },
-    { 0x00, 0xC7, 0xC7 },
-    { 0x00, 0xC8, 0xC8 },
-    { 0x00, 0xC9, 0xC9 },
-    { 0x00, 0xCA, 0xCA },
-    { 0x00, 0xCB, 0xCB },
-    { 0x00, 0xCC, 0xCC },
-    { 0x00, 0xCD, 0xCD },
-    { 0x00, 0xCE, 0xCE },
-    { 0x00, 0xCF, 0xCF },
-    { 0x00, 0xD0, 0xD0 },
-    { 0x00, 0xD1, 0xD1 },
-    { 0x00, 0xD2, 0xD2 },
-    { 0x00, 0xD3, 0xD3 },
-    { 0x00, 0xD4, 0xD4 },
-    { 0x00, 0xD5, 0xD5 },
-    { 0x00, 0xD6, 0xD6 },
-    { 0x00, 0xD7, 0xD7 },
-    { 0x00, 0xD8, 0xD8 },
-    { 0x00, 0xD9, 0xD9 },
-    { 0x00, 0xDA, 0xDA },
-    { 0x00, 0xDB, 0xDB },
-    { 0x00, 0xDC, 0xDC },
-    { 0x00, 0xDD, 0xDD },
-    { 0x00, 0xDE, 0xDE },
-    { 0x00, 0xDF, 0xDF },
-    { 0x00, 0xE0, 0xE0 },
-    { 0x00, 0xE1, 0xE1 },
-    { 0x00, 0xE2, 0xE2 },
-    { 0x00, 0xE3, 0xE3 },
-    { 0x00, 0xE4, 0xE4 },
-    { 0x00, 0xE5, 0xE5 },
-    { 0x00, 0xE6, 0xE6 },
-    { 0x00, 0xE7, 0xE7 },
-    { 0x00, 0xE8, 0xE8 },
-    { 0x00, 0xE9, 0xE9 },
-    { 0x00, 0xEA, 0xEA },
-    { 0x00, 0xEB, 0xEB },
-    { 0x00, 0xEC, 0xEC },
-    { 0x00, 0xED, 0xED },
-    { 0x00, 0xEE, 0xEE },
-    { 0x00, 0xEF, 0xEF },
-    { 0x00, 0xF0, 0xF0 },
-    { 0x00, 0xF1, 0xF1 },
-    { 0x00, 0xF2, 0xF2 },
-    { 0x00, 0xF3, 0xF3 },
-    { 0x00, 0xF4, 0xF4 },
-    { 0x00, 0xF5, 0xF5 },
-    { 0x00, 0xF6, 0xF6 },
-    { 0x00, 0xF7, 0xF7 },
-    { 0x00, 0xF8, 0xF8 },
-    { 0x00, 0xF9, 0xF9 },
-    { 0x00, 0xFA, 0xFA },
-    { 0x00, 0xFB, 0xFB },
-    { 0x00, 0xFC, 0xFC },
-    { 0x00, 0xFD, 0xFD },
-    { 0x00, 0xFE, 0xFE },
-    { 0x00, 0xFF, 0xFF }
-};
-
-struct _PDCLIB_lc_ctype_t _PDCLIB_lc_ctype = { 0, 0x30, 0x39, 0x41, 0x46, 0x61, 0x66, &_ctype_entries[1] };
-
-struct _PDCLIB_lc_collate_t _PDCLIB_lc_collate = { 0 };
-
-struct lconv _PDCLIB_lconv = {
-    /* decimal_point      */ (char *)".",
-    /* thousands_sep      */ (char *)"",
-    /* grouping           */ (char *)"",
-    /* mon_decimal_point  */ (char *)"",
-    /* mon_thousands_sep  */ (char *)"",
-    /* mon_grouping       */ (char *)"",
-    /* positive_sign      */ (char *)"",
-    /* negative_sign      */ (char *)"",
-    /* currency_symbol    */ (char *)"",
-    /* int_curr_symbol    */ (char *)"",
-    /* frac_digits        */ CHAR_MAX,
-    /* p_cs_precedes      */ CHAR_MAX,
-    /* n_cs_precedes      */ CHAR_MAX,
-    /* p_sep_by_space     */ CHAR_MAX,
-    /* n_sep_by_space     */ CHAR_MAX,
-    /* p_sign_posn        */ CHAR_MAX,
-    /* n_sign_posn        */ CHAR_MAX,
-    /* int_frac_digits    */ CHAR_MAX,
-    /* int_p_cs_precedes  */ CHAR_MAX,
-    /* int_n_cs_precedes  */ CHAR_MAX,
-    /* int_p_sep_by_space */ CHAR_MAX,
-    /* int_n_sep_by_space */ CHAR_MAX,
-    /* int_p_sign_posn    */ CHAR_MAX,
-    /* int_n_sign_posn    */ CHAR_MAX
-};
-
-struct _PDCLIB_lc_numeric_monetary_t _PDCLIB_lc_numeric_monetary = {
-    &_PDCLIB_lconv,
-    0, /* numeric_allocated  */
-    0  /* monetary_allocated */
-};
-
-struct _PDCLIB_lc_messages_t _PDCLIB_lc_messages = {
-    0,
-    /* _PDCLIB_errno_texts */
-    {
-        /* no error */ (char *)"",
-        /* ERANGE   */ (char *)"ERANGE (Range error)",
-        /* EDOM     */ (char *)"EDOM (Domain error)",
-        /* EILSEQ   */ (char *)"EILSEQ (Illegal sequence)"
-    }
-};
-
-struct _PDCLIB_lc_time_t _PDCLIB_lc_time = {
-    0,
-    /* _PDCLIB_month_name_abbr */
-    {
-        (char *)"Jan",
-        (char *)"Feb",
-        (char *)"Mar",
-        (char *)"Apr",
-        (char *)"May",
-        (char *)"Jun",
-        (char *)"Jul",
-        (char *)"Aug",
-        (char *)"Sep",
-        (char *)"Oct",
-        (char *)"Now",
-        (char *)"Dec"
-    },
-    /* _PDCLIB_month_name_full */
-    {
-        (char *)"January",
-        (char *)"February",
-        (char *)"March",
-        (char *)"April",
-        (char *)"May",
-        (char *)"June",
-        (char *)"July",
-        (char *)"August",
-        (char *)"September",
-        (char *)"October",
-        (char *)"November",
-        (char *)"December"
-    },
-    /* _PDCLIB_day_name_abbr */
-    {
-        (char *)"Sun",
-        (char *)"Mon",
-        (char *)"Tue",
-        (char *)"Wed",
-        (char *)"Thu",
-        (char *)"Fri",
-        (char *)"Sat"
-    },
-    /* _PDCLIB_day_name_full */
-    {
-        (char *)"Sunday",
-        (char *)"Monday",
-        (char *)"Tuesday",
-        (char *)"Wednesday",
-        (char *)"Thursday",
-        (char *)"Friday",
-        (char *)"Saturday"
-    },
-    /* date / time format */ (char *)"%a %b %e %T %Y",
-    /* 12h time format    */ (char *)"%I:%M:%S %p",
-    /* date format        */ (char *)"%m/%d/%y",
-    /* time format        */ (char *)"%T",
-    /* AM / PM designation */
-    {
-        (char *)"AM",
-        (char *)"PM"
-    }
-};
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    /* Testing covered by several other testdrivers using stdin / stdout /
-       stderr.
-    */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/signal/raise.c

@@ -1,114 +0,0 @@
-/* raise( int )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <signal.h>
-
-#ifndef REGTEST
-
-#include <stdio.h>
-#include <stdlib.h>
-
-extern void (*_PDCLIB_sigabrt)( int );
-extern void (*_PDCLIB_sigfpe)( int );
-extern void (*_PDCLIB_sigill)( int );
-extern void (*_PDCLIB_sigint)( int );
-extern void (*_PDCLIB_sigsegv)( int );
-extern void (*_PDCLIB_sigterm)( int );
-
-int raise( int sig )
-{
-    void (*sighandler)( int );
-    const char * message;
-    switch ( sig )
-    {
-        case SIGABRT:
-            sighandler = _PDCLIB_sigabrt;
-            message = "Abnormal termination (SIGABRT)";
-            break;
-        case SIGFPE:
-            sighandler = _PDCLIB_sigfpe;
-            message = "Arithmetic exception (SIGFPE)";
-            break;
-        case SIGILL:
-            sighandler = _PDCLIB_sigill;
-            message = "Illegal instruction (SIGILL)";
-            break;
-        case SIGINT:
-            sighandler = _PDCLIB_sigint;
-            message = "Interactive attention signal (SIGINT)";
-            break;
-        case SIGSEGV:
-            sighandler = _PDCLIB_sigsegv;
-            message = "Invalid memory access (SIGSEGV)";
-            break;
-        case SIGTERM:
-            sighandler = _PDCLIB_sigterm;
-            message = "Termination request (SIGTERM)";
-            break;
-        default:
-            fprintf( stderr, "Unknown signal #%d\n", sig );
-            _Exit( EXIT_FAILURE );
-    }
-    if ( sighandler == SIG_DFL )
-    {
-        fputs( message, stderr );
-        _Exit( EXIT_FAILURE );
-    }
-    else if ( sighandler != SIG_IGN )
-    {
-        sighandler = signal( sig, SIG_DFL );
-        sighandler( sig );
-    }
-    return 0;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-#include <stdlib.h>
-
-static volatile sig_atomic_t flag = 0;
-
-static int expected_signal = 0;
-
-static void test_handler( int sig )
-{
-    TESTCASE( sig == expected_signal );
-    flag = 1;
-}
-
-int main( void )
-{
-    /* Could be other than SIG_DFL if you changed the implementation. */
-    TESTCASE( signal( SIGABRT, SIG_IGN ) == SIG_DFL );
-    /* Should be ignored. */
-    TESTCASE( raise( SIGABRT ) == 0 );
-    /* Installing test handler, old handler should be returned */
-    TESTCASE( signal( SIGABRT, test_handler ) == SIG_IGN );
-    /* Raising and checking SIGABRT */
-    expected_signal = SIGABRT;
-    TESTCASE( raise( SIGABRT ) == 0 );
-    TESTCASE( flag == 1 );
-    /* Re-installing test handler, should have been reset to default */
-    /* Could be other than SIG_DFL if you changed the implementation. */
-    TESTCASE( signal( SIGABRT, test_handler ) == SIG_DFL );
-    /* Raising and checking SIGABRT */
-    flag = 0;
-    TESTCASE( raise( SIGABRT ) == 0 );
-    TESTCASE( flag == 1 );
-    /* Installing test handler for different signal... */
-    TESTCASE( signal( SIGTERM, test_handler ) == SIG_DFL );
-    /* Raising and checking SIGTERM */
-    expected_signal = SIGTERM;
-    TESTCASE( raise( SIGTERM ) == 0 );
-    TESTCASE( flag == 1 );
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/signal/signal.c

@@ -1,75 +0,0 @@
-/* signal( int, void (*)( int ) )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <signal.h>
-
-#ifndef REGTEST
-
-#include <stdlib.h>
-
-void (*_PDCLIB_sigabrt)( int ) = SIG_DFL;
-void (*_PDCLIB_sigfpe)( int )  = SIG_DFL;
-void (*_PDCLIB_sigill)( int )  = SIG_DFL;
-void (*_PDCLIB_sigint)( int )  = SIG_DFL;
-void (*_PDCLIB_sigsegv)( int ) = SIG_DFL;
-void (*_PDCLIB_sigterm)( int ) = SIG_DFL;
-
-void (*signal( int sig, void (*func)( int ) ) )( int )
-{
-    void (*oldhandler)( int );
-    if ( sig <= 0 || func == SIG_ERR )
-    {
-        return SIG_ERR;
-    }
-    switch ( sig )
-    {
-        case SIGABRT:
-            oldhandler = _PDCLIB_sigabrt;
-            _PDCLIB_sigabrt = func;
-            break;
-        case SIGFPE:
-            oldhandler = _PDCLIB_sigfpe;
-            _PDCLIB_sigfpe = func;
-            break;
-        case SIGILL:
-            oldhandler = _PDCLIB_sigill;
-            _PDCLIB_sigill = func;
-            break;
-        case SIGINT:
-            oldhandler = _PDCLIB_sigint;
-            _PDCLIB_sigint = func;
-            break;
-        case SIGSEGV:
-            oldhandler = _PDCLIB_sigsegv;
-            _PDCLIB_sigsegv = func;
-            break;
-        case SIGTERM:
-            oldhandler = _PDCLIB_sigterm;
-            _PDCLIB_sigterm = func;
-            break;
-        default:
-            /* The standard calls for an unspecified "positive value". You
-               will probably want to define a specific value for this.
-            */
-            _PDCLIB_errno = 1;
-            return SIG_ERR;
-    }
-    return oldhandler;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    /* Testing covered by raise.c */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/stdio/remove.c

@@ -1,75 +0,0 @@
-/* remove( const char * )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of remove() fit for use with POSIX kernels.
-*/
-
-#include <stdio.h>
-
-#ifndef REGTEST
-
-#include <string.h>
-
-#include "/usr/include/errno.h"
-
-extern struct _PDCLIB_file_t * _PDCLIB_filelist;
-
-extern int unlink( const char * pathname );
-
-int remove( const char * pathname )
-{
-    int rc;
-    struct _PDCLIB_file_t * current = _PDCLIB_filelist;
-    while ( current != NULL )
-    {
-        if ( ( current->filename != NULL ) && ( strcmp( current->filename, pathname ) == 0 ) )
-        {
-            return EOF;
-        }
-        current = current->next;
-    }
-    if ( ( rc = unlink( pathname ) ) == -1 )
-    {
-        switch ( errno )
-        {
-            /* See the comments on implementation-defined errno values in
-               <_PDCLIB_config.h>.
-            */
-            case EACCES:
-            case EFAULT:
-            case EIO:
-            case EISDIR:
-            case ELOOP:
-            case ENAMETOOLONG:
-            case ENOENT:
-            case ENOMEM:
-            case ENOTDIR:
-            case EPERM:
-            case EROFS:
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-            default:
-                /* This should be something like EUNKNOWN. */
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-        }
-    }
-    return rc;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    /* Testing covered by ftell.c (and several others) */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/stdio/tmpfile.c

@@ -1,114 +0,0 @@
-/* tmpfile( void )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <stdio.h>
-
-#ifndef REGTEST
-
-#include "pdclib/_PDCLIB_glue.h"
-
-#include <inttypes.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-extern struct _PDCLIB_file_t * _PDCLIB_filelist;
-
-/* This is an example implementation of tmpfile() fit for use with POSIX
-   kernels.
-*/
-struct _PDCLIB_file_t * tmpfile( void )
-{
-    FILE * rc;
-    /* This is the chosen way to get high-quality randomness. Replace as
-       appropriate.
-    */
-    FILE * randomsource = fopen( "/proc/sys/kernel/random/uuid", "rb" );
-    char filename[ L_tmpnam ];
-    _PDCLIB_fd_t fd;
-    if ( randomsource == NULL )
-    {
-        return NULL;
-    }
-    for ( ;; )
-    {
-        /* Get a filename candidate. What constitutes a valid filename and
-           where temporary files are usually located is platform-dependent,
-           which is one reason why this function is located in the platform
-           overlay. The other reason is that a *good* implementation should
-           use high-quality randomness instead of a pseudo-random sequence to
-           generate the filename candidate, which is *also* platform-dependent.
-        */
-        unsigned int random;
-        fscanf( randomsource, "%u", &random );
-        sprintf( filename, "/tmp/%u.tmp", random );
-        /* Check if file of this name exists. Note that fopen() is a very weak
-           check, which does not take e.g. access permissions into account
-           (file might exist but not readable). Replace with something more
-           appropriate.
-        */
-        fd = open( filename, O_CREAT | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR );
-        if ( fd != -1 )
-        {
-            break;
-        }
-        close( fd );
-    }
-    fclose( randomsource );
-    /* See fopen(). */
-    if ( ( rc = calloc( 1, sizeof( struct _PDCLIB_file_t ) + _PDCLIB_UNGETCBUFSIZE + L_tmpnam + BUFSIZ ) ) == NULL )
-    {
-        /* No memory to set up FILE structure */
-        close( fd );
-        return NULL;
-    }
-    rc->status = _PDCLIB_filemode( "wb+" ) | _IOLBF | _PDCLIB_DELONCLOSE;
-    rc->handle = fd;
-    rc->ungetbuf = (unsigned char *)rc + sizeof( struct _PDCLIB_file_t );
-    rc->filename = (char *)rc->ungetbuf + _PDCLIB_UNGETCBUFSIZE;
-    rc->buffer   = rc->filename + L_tmpnam;
-    strcpy( rc->filename, filename );
-    rc->bufsize = BUFSIZ;
-    rc->bufidx = 0;
-    rc->ungetidx = 0;
-    rc->next = _PDCLIB_filelist;
-    _PDCLIB_filelist = rc;
-    return rc;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-#include <string.h>
-
-int main( void )
-{
-    FILE * fh;
-#ifndef REGTEST
-    char filename[ L_tmpnam ];
-    FILE * fhtest;
-#endif
-    TESTCASE( ( fh = tmpfile() ) != NULL );
-    TESTCASE( fputc( 'x', fh ) == 'x' );
-    /* Checking that file is actually there */
-    TESTCASE_NOREG( strcpy( filename, fh->filename ) == filename );
-    TESTCASE_NOREG( ( fhtest = fopen( filename, "r" ) ) != NULL );
-    TESTCASE_NOREG( fclose( fhtest ) == 0 );
-    /* Closing tmpfile */
-    TESTCASE( fclose( fh ) == 0 );
-    /* Checking that file was deleted */
-    TESTCASE_NOREG( fopen( filename, "r" ) == NULL );
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/stdlib/getenv.c

@@ -1,45 +0,0 @@
-/* getenv( const char * )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-/* This is an example implementation of getenv() fit for use with POSIX kernels.
-*/
-
-#include <string.h>
-#include <stdlib.h>
-
-#ifndef REGTEST
-
-extern char * * environ;
-
-char * getenv( const char * name )
-{
-    size_t len = strlen( name );
-    size_t index = 0;
-    while ( environ[ index ] != NULL )
-    {
-        if ( strncmp( environ[ index ], name, len ) == 0 )
-        {
-            return environ[ index ] + len + 1;
-        }
-        index++;
-    }
-    return NULL;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    TESTCASE( strcmp( getenv( "SHELL" ), "/bin/bash" ) == 0 );
-    /* TESTCASE( strcmp( getenv( "SHELL" ), "/bin/sh" ) == 0 ); */
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/stdlib/system.c

@@ -1,57 +0,0 @@
-/* system( const char * )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <stdlib.h>
-
-/* This is an example implementation of system() fit for use with POSIX kernels.
-*/
-
-extern int fork( void );
-extern int execve( const char * filename, char * const argv[], char * const envp[] );
-extern int wait( int * status );
-
-int system( const char * string )
-{
-    const char * argv[] = { "sh", "-c", NULL, NULL };
-    argv[2] = string;
-    if ( string != NULL )
-    {
-        int pid = fork();
-        if ( pid == 0 )
-        {
-            execve( "/bin/sh", (char * * const)argv, NULL );
-        }
-        else if ( pid > 0 )
-        {
-            while( wait( NULL ) != pid );
-        }
-    }
-    return -1;
-}
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-#define SHELLCOMMAND "echo 'SUCCESS testing system()'"
-
-int main( void )
-{
-    FILE * fh;
-    char buffer[25];
-    buffer[24] = 'x';
-    TESTCASE( ( fh = freopen( testfile, "wb+", stdout ) ) != NULL );
-    TESTCASE( system( SHELLCOMMAND ) );
-    rewind( fh );
-    TESTCASE( fread( buffer, 1, 24, fh ) == 24 );
-    TESTCASE( memcmp( buffer, "SUCCESS testing system()", 24 ) == 0 );
-    TESTCASE( buffer[24] == 'x' );
-    TESTCASE( fclose( fh ) == 0 );
-    TESTCASE( remove( testfile ) == 0 );
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/time/clock.c

@@ -1,35 +0,0 @@
-/* clock( void )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <time.h>
-
-#ifndef REGTEST
-
-#include <sys/times.h>
-
-clock_t clock( void )
-{
-    struct tms buf;
-    if ( times( &buf ) != (clock_t)-1 )
-    {
-        return buf.tms_utime + buf.tms_stime;
-    }
-    return -1;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    TESTCASE( NO_TESTDRIVER );
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/time/time.c

@@ -1,41 +0,0 @@
-/* time( time_t * )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <time.h>
-
-#ifndef REGTEST
-
-#include <sys/time.h>
-
-/* See comments in time.h on the semantics of time_t. */
-
-time_t time( time_t * timer )
-{
-    struct timeval tv;
-    if ( gettimeofday( &tv, NULL ) == 0 )
-    {
-        if ( timer != NULL )
-        {
-            *timer = tv.tv_sec;
-        }
-        return tv.tv_sec;
-    }
-    return -1;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    TESTCASE( NO_TESTDRIVER );
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/functions/time/timespec_get.c

@@ -1,42 +0,0 @@
-/* timespec_get( struct timespec *, int )
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#include <time.h>
-
-#ifndef REGTEST
-
-#include <sys/time.h>
-
-int timespec_get( struct timespec * ts, int base )
-{
-    if ( base == TIME_UTC )
-    {
-        /* We can make do with a really thin wrapper here. */
-        struct timeval tv;
-        if ( gettimeofday( &tv, NULL ) == 0 )
-        {
-            ts->tv_sec = tv.tv_sec;
-            ts->tv_nsec = tv.tv_usec * 1000;
-            return base;
-        }
-    }
-    /* Not supporting any other time base than TIME_UTC for now. */
-    return 0;
-}
-
-#endif
-
-#ifdef TEST
-
-#include "_PDCLIB_test.h"
-
-int main( void )
-{
-    TESTCASE( NO_TESTDRIVER );
-    return TEST_RESULTS;
-}
-
-#endif

src/pdclib/platform/example/include/float.h

@@ -1,75 +0,0 @@
-/* Characteristics of floating types <float.h>
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#ifndef _PDCLIB_FLOAT_H
-#define _PDCLIB_FLOAT_H _PDCLIB_FLOAT_H
-
-#include "pdclib/_PDCLIB_config.h"
-
-#define FLT_ROUNDS      _PDCLIB_FLT_ROUNDS
-#define FLT_EVAL_METHOD _PDCLIB_FLT_EVAL_METHOD
-#define DECIMAL_DIG     _PDCLIB_DECIMAL_DIG
-
-   /* Radix of exponent representation */
-#define FLT_RADIX      __FLT_RADIX__
-   /* Number of base-FLT_RADIX digits in the significand of a float */
-#define FLT_MANT_DIG   __FLT_MANT_DIG__
-   /* Number of decimal digits of precision in a float */
-#define FLT_DIG        __FLT_DIG__
-   /* Difference between 1.0 and the minimum float greater than 1.0 */
-#define FLT_EPSILON    __FLT_EPSILON__
-   /* Minimum int x such that FLT_RADIX**(x-1) is a normalised float */
-#define FLT_MIN_EXP    __FLT_MIN_EXP__
-   /* Minimum normalised float */
-#define FLT_MIN        __FLT_MIN__
-   /* Minimum int x such that 10**x is a normalised float */
-#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
-   /* Maximum int x such that FLT_RADIX**(x-1) is a representable float */
-#define FLT_MAX_EXP    __FLT_MAX_EXP__
-   /* Maximum float */
-#define FLT_MAX        __FLT_MAX__
-   /* Maximum int x such that 10**x is a representable float */
-#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
-
-   /* Number of base-FLT_RADIX digits in the significand of a double */
-#define DBL_MANT_DIG   __DBL_MANT_DIG__
-   /* Number of decimal digits of precision in a double */
-#define DBL_DIG        __DBL_DIG__
-   /* Difference between 1.0 and the minimum double greater than 1.0 */
-#define DBL_EPSILON    __DBL_EPSILON__
-   /* Minimum int x such that FLT_RADIX**(x-1) is a normalised double */
-#define DBL_MIN_EXP    __DBL_MIN_EXP__
-   /* Minimum normalised double */
-#define DBL_MIN        __DBL_MIN__
-   /* Minimum int x such that 10**x is a normalised double */
-#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
-   /* Maximum int x such that FLT_RADIX**(x-1) is a representable double */
-#define DBL_MAX_EXP    __DBL_MAX_EXP__
-   /* Maximum double */
-#define DBL_MAX        __DBL_MAX__
-   /* Maximum int x such that 10**x is a representable double */
-#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
-
-   /* Number of base-FLT_RADIX digits in the significand of a long double */
-#define LDBL_MANT_DIG   __LDBL_MANT_DIG__
-   /* Number of decimal digits of precision in a long double */
-#define LDBL_DIG        __LDBL_DIG__
-   /* Difference between 1.0 and the minimum long double greater than 1.0 */
-#define LDBL_EPSILON    __LDBL_EPSILON__
-   /* Minimum int x such that FLT_RADIX**(x-1) is a normalised long double */
-#define LDBL_MIN_EXP    __LDBL_MIN_EXP__
-   /* Minimum normalised long double */
-#define LDBL_MIN        __LDBL_MIN__
-   /* Minimum int x such that 10**x is a normalised long double */
-#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
-   /* Maximum int x such that FLT_RADIX**(x-1) is a representable long double */
-#define LDBL_MAX_EXP    __LDBL_MAX_EXP__
-   /* Maximum long double */
-#define LDBL_MAX        __LDBL_MAX__
-   /* Maximum int x such that 10**x is a representable long double */
-#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
-
-#endif

src/pdclib/platform/example/include/pdclib/_PDCLIB_config.h

@@ -1,426 +0,0 @@
-/* Internal PDCLib configuration <_PDCLIB_config.h>
-   (Generic Template)
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#ifndef _PDCLIB_CONFIG_H
-#define _PDCLIB_CONFIG_H _PDCLIB_CONFIG_H
-
-/* -------------------------------------------------------------------------- */
-/* Misc                                                                       */
-/* -------------------------------------------------------------------------- */
-
-/* The character (sequence) your platform uses as newline.                    */
-#define _PDCLIB_endl "\n"
-
-/* exit() can signal success to the host environment by the value of zero or  */
-/* the constant EXIT_SUCCESS. Failure is signaled by EXIT_FAILURE. Note that  */
-/* any other return value is "implementation-defined", i.e. your environment  */
-/* is not required to handle it gracefully. Set your definitions here.        */
-#define _PDCLIB_SUCCESS 0
-#define _PDCLIB_FAILURE -1
-
-/* qsort() in <stdlib.h> requires a function that swaps two memory areas.     */
-/* Below is a naive implementation that can be improved significantly for     */
-/* specific platforms, e.g. by swapping int instead of char.                  */
-#define _PDCLIB_memswp( i, j, size ) char tmp; do { tmp = *i; *i++ = *j; *j++ = tmp; } while ( --size );
-
-/* Define this to some compiler directive that can be written after the       */
-/* parameter list of a function declaration to indicate the function does     */
-/* never return. If your compiler does not support such a directive, define   */
-/* to nothing. (This is to avoid warnings with the exit functions under GCC.) */
-#define _PDCLIB_NORETURN __attribute__(( noreturn ))
-
-/* -------------------------------------------------------------------------- */
-/* Integers                                                                   */
-/* -------------------------------------------------------------------------- */
-/* Assuming 8-bit char, two's-complement architecture here. 'short' being     */
-/* 16 bit, 'int' being either 16, 32 or 64 bit, 'long' being either 32 or 64  */
-/* bit (but 64 bit only if 'int' is 32 bit), and 'long long' being 64 bit if  */
-/* 'long' is not, 64 or 128 bit otherwise.                                    */
-/* Author is quite willing to support other systems but would like to hear of */
-/* interest in such support and details on the to-be-supported architecture   */
-/* first, before going to lengths about it.                                   */
-/* -------------------------------------------------------------------------- */
-
-/* Set to 0 if your 'char' type is unsigned.                                  */
-#ifdef __CHAR_UNSIGNED__
-#define _PDCLIB_CHAR_SIGNED 0
-#else
-#define _PDCLIB_CHAR_SIGNED 1
-#endif
-
-/* Width of the integer types short, int, long, and long long, in bytes.      */
-/* SHRT == 2, INT >= SHRT, LONG >= INT >= 4, LLONG >= LONG - check your       */
-/* compiler manuals.                                                          */
-#define _PDCLIB_SHRT_BYTES  2
-#define _PDCLIB_INT_BYTES   4
-#ifdef __LP64__
-#define _PDCLIB_LONG_BYTES  8
-#else
-#define _PDCLIB_LONG_BYTES  4
-#endif
-#define _PDCLIB_LLONG_BYTES 8
-
-/* <stdlib.h> defines the div() function family that allows taking quotient   */
-/* and remainder of an integer division in one operation. Many platforms      */
-/* support this in hardware / opcode, and the standard permits ordering of    */
-/* the return structure in any way to fit the hardware. That is why those     */
-/* structs can be configured here.                                            */
-
-struct _PDCLIB_div_t
-{
-    int quot;
-    int rem;
-};
-
-struct _PDCLIB_ldiv_t
-{
-    long int quot;
-    long int rem;
-};
-
-struct _PDCLIB_lldiv_t
-{
-    long long int quot;
-    long long int rem;
-};
-
-/* -------------------------------------------------------------------------- */
-/* <stdint.h> defines a set of integer types that are of a minimum width, and */
-/* "usually fastest" on the system. (If, for example, accessing a single char */
-/* requires the CPU to access a complete int and then mask out the char, the  */
-/* "usually fastest" type of at least 8 bits would be int, not char.)         */
-/* If you do not have information on the relative performance of the types,   */
-/* the standard allows you to define any type that meets minimum width and    */
-/* signedness requirements.                                                   */
-/* The defines below are just configuration for the real typedefs and limit   */
-/* definitions done in <_PDCLIB_int.h>. The uppercase define shall be either  */
-/* SHRT, INT, LONG, or LLONG (telling which values to use for the *_MIN and   */
-/* *_MAX limits); the lowercase define either short, int, long, or long long  */
-/* (telling the actual type to use).                                          */
-/* The third define is the length modifier used for the type in printf() and  */
-/* scanf() functions (used in <inttypes.h>).                                  */
-/* If you require a non-standard datatype to define the "usually fastest"     */
-/* types, PDCLib as-is doesn't support that. Please contact the author with   */
-/* details on your platform in that case, so support can be added.            */
-/* -------------------------------------------------------------------------- */
-
-#define _PDCLIB_FAST8 INT
-#define _PDCLIB_fast8 int
-#define _PDCLIB_FAST8_CONV
-
-#define _PDCLIB_FAST16 INT
-#define _PDCLIB_fast16 int
-#define _PDCLIB_FAST16_CONV
-
-#define _PDCLIB_FAST32 INT
-#define _PDCLIB_fast32 int
-#define _PDCLIB_FAST32_CONV
-
-#define _PDCLIB_FAST64 LONG
-#define _PDCLIB_fast64 long
-#define _PDCLIB_FAST64_CONV l
-
-/* -------------------------------------------------------------------------- */
-/* What follows are a couple of "special" typedefs and their limits. Again,   */
-/* the actual definition of the limits is done in <_PDCLIB_int.h>, and the    */
-/* defines here are merely "configuration". See above for details.            */
-/* -------------------------------------------------------------------------- */
-
-/* The result type of substracting two pointers */
-#define _PDCLIB_ptrdiff long
-#define _PDCLIB_PTRDIFF LONG
-#define _PDCLIB_PTR_CONV l
-
-/* An integer type that can be accessed as atomic entity (think asynchronous
-   interrupts). The type itself is not defined in a freestanding environment,
-   but its limits are. (Don't ask.)
-*/
-#define _PDCLIB_sig_atomic int
-#define _PDCLIB_SIG_ATOMIC INT
-
-/* Result type of the 'sizeof' operator (must be unsigned) */
-#define _PDCLIB_size unsigned long
-#define _PDCLIB_SIZE ULONG
-
-/* Large enough an integer to hold all character codes of the largest supported
-   locale.
-*/
-#define _PDCLIB_wchar unsigned int
-#define _PDCLIB_WCHAR UINT
-
-/* Large enough an integer to hold all character codes of the largest supported
-   locale plus WEOF (which needs not to be equal to EOF, nor needs to be of
-   negative value).
-*/
-#define _PDCLIB_wint unsigned int
-#define _PDCLIB_WINT UINT
-
-/* (Signed) integer type capable of taking the (cast) value of a void *, and
-   having the value cast back to void *, comparing equal to the original.
-*/
-#define _PDCLIB_intptr long
-#define _PDCLIB_INTPTR LONG
-
-/* Largest supported integer type. Implementation note: see _PDCLIB_atomax(). */
-#define _PDCLIB_intmax long long int
-#define _PDCLIB_INTMAX LLONG
-#define _PDCLIB_MAX_CONV ll
-/* You are also required to state the literal suffix for the intmax type      */
-#define _PDCLIB_INTMAX_LITERAL ll
-
-/* <inttypes.h> defines imaxdiv(), which is equivalent to the div() function  */
-/* family (see further above) with intmax_t as basis.                         */
-
-struct _PDCLIB_imaxdiv_t
-{
-    _PDCLIB_intmax quot;
-    _PDCLIB_intmax rem;
-};
-
-/* -------------------------------------------------------------------------- */
-/* Time types                                                                 */
-/* -------------------------------------------------------------------------- */
-
-/* See <time.h> for a couple of comments on these types and their semantics. */
-
-#define _PDCLIB_time long
-
-#define _PDCLIB_clock long
-#define _PDCLIB_CLOCKS_PER_SEC 1000000
-
-#define _PDCLIB_TIME_UTC 1
-
-/* -------------------------------------------------------------------------- */
-/* Floating Point                                                             */
-/* -------------------------------------------------------------------------- */
-
-/* Whether the implementation rounds toward zero (0), to nearest (1), toward
-   positive infinity (2), or toward negative infinity (3). (-1) signifies
-   indeterminable rounding, any other value implementation-specific rounding.
-*/
-#define _PDCLIB_FLT_ROUNDS -1
-
-/* Whether the implementation uses exact-width precision (0), promotes float
-   to double (1), or promotes float and double to long double (2). (-1)
-   signifies indeterminable behaviour, any other value implementation-specific
-   behaviour.
-*/
-#define _PDCLIB_FLT_EVAL_METHOD -1
-
-/* "Number of the decimal digits (n), such that any floating-point number in the
-   widest supported floating type with p(max) radix (b) digits can be rounded to
-   a floating-point number with (n) decimal digits and back again without change
-   to the value p(max) log(10)b if (b) is a power of 10, [1 + p(max) log(10)b]
-   otherwise."
-   64bit IEC 60559 double format (53bit mantissa) is DECIMAL_DIG 17.
-   80bit IEC 60559 double-extended format (64bit mantissa) is DECIMAL_DIG 21.
-*/
-#define _PDCLIB_DECIMAL_DIG 17
-
-/* -------------------------------------------------------------------------- */
-/* Platform-dependent macros defined by the standard headers.                 */
-/* -------------------------------------------------------------------------- */
-
-/* The offsetof macro
-   Contract: Expand to an integer constant expression of type size_t, which
-   represents the offset in bytes to the structure member from the beginning
-   of the structure. If the specified member is a bitfield, behaviour is
-   undefined.
-   There is no standard-compliant way to do this.
-   This implementation casts an integer zero to 'pointer to type', and then
-   takes the address of member. This is undefined behaviour but should work on
-   most compilers.
-*/
-#define _PDCLIB_offsetof( type, member ) ( (size_t) &( ( (type *) 0 )->member ) )
-
-/* Variable Length Parameter List Handling (<stdarg.h>)
-   The macros defined by <stdarg.h> are highly dependent on the calling
-   conventions used, and you probably have to replace them with builtins of
-   your compiler.
-*/
-
-#if defined( __i386 )
-
-/* The following generic implementation works only for pure
-   stack-based architectures, and only if arguments are aligned to pointer
-   type. Credits to Michael Moody, who contributed this to the Public Domain.
-*/
-
-/* Internal helper macro. va_round is not part of <stdarg.h>. */
-#define _PDCLIB_va_round( type ) ( (sizeof(type) + sizeof(void *) - 1) & ~(sizeof(void *) - 1) )
-
-typedef char * _PDCLIB_va_list;
-#define _PDCLIB_va_arg( ap, type ) ( (ap) += (_PDCLIB_va_round(type)), ( *(type*) ( (ap) - (_PDCLIB_va_round(type)) ) ) )
-#define _PDCLIB_va_copy( dest, src ) ( (dest) = (src), (void)0 )
-#define _PDCLIB_va_end( ap ) ( (ap) = (void *)0, (void)0 )
-#define _PDCLIB_va_start( ap, parmN ) ( (ap) = (char *) &parmN + ( _PDCLIB_va_round(parmN) ), (void)0 )
-
-#elif defined( __x86_64 ) || defined( __arm__ )
-
-/* No way to cover x86_64 or arm with a generic implementation, as it uses
-    register-based parameter passing. Using compiler builtins here.
-*/
-typedef __builtin_va_list _PDCLIB_va_list;
-#define _PDCLIB_va_arg( ap, type ) ( __builtin_va_arg( ap, type ) )
-#define _PDCLIB_va_copy( dest, src ) ( __builtin_va_copy( dest, src ) )
-#define _PDCLIB_va_end( ap ) ( __builtin_va_end( ap ) )
-#define _PDCLIB_va_start( ap, parmN ) ( __builtin_va_start( ap, parmN ) )
-
-#else
-
-#error Please create your own _PDCLIB_config.h. Using the existing one as-is will not work.
-
-#endif
-
-/* -------------------------------------------------------------------------- */
-/* OS "glue", part 1                                                          */
-/* These are values and data type definitions that you would have to adapt to */
-/* the capabilities and requirements of your OS.                              */
-/* The actual *functions* of the OS interface are declared in _PDCLIB_glue.h. */
-/* -------------------------------------------------------------------------- */
-
-/* Memory management -------------------------------------------------------- */
-
-/* Set this to the page size of your OS. If your OS does not support paging, set
-   to an appropriate value. (Too small, and malloc() will call the kernel too
-   often. Too large, and you will waste memory.)
-*/
-#define _PDCLIB_PAGESIZE 4096
-
-/* Set this to the minimum memory node size. Any malloc() for a smaller size
-   will be satisfied by a malloc() of this size instead (to avoid excessive
-   fragmentation).
-*/
-#define _PDCLIB_MINALLOC 8
-
-/* I/O ---------------------------------------------------------------------- */
-
-/* The type of the file descriptor returned by _PDCLIB_open(). */
-typedef int _PDCLIB_fd_t;
-
-/* The value (of type _PDCLIB_fd_t) returned by _PDCLIB_open() if the operation
-   failed.
-*/
-#define _PDCLIB_NOHANDLE ( (_PDCLIB_fd_t) -1 )
-
-/* The default size for file buffers. Must be at least 256. */
-#define _PDCLIB_BUFSIZ 1024
-
-/* The minimum number of files the implementation can open simultaneously. Must
-   be at least 8. Depends largely on how the bookkeeping is done by fopen() /
-   freopen() / fclose(). The example implementation limits the number of open
-   files only by available memory.
-*/
-#define _PDCLIB_FOPEN_MAX 8
-
-/* Length of the longest filename the implementation guarantees to support. */
-#define _PDCLIB_FILENAME_MAX 128
-
-/* Maximum length of filenames generated by tmpnam(). (See tmpfile.c.) */
-#define _PDCLIB_L_tmpnam 46
-
-/* Number of distinct file names that can be generated by tmpnam(). */
-#define _PDCLIB_TMP_MAX 50
-
-/* The values of SEEK_SET, SEEK_CUR and SEEK_END, used by fseek().
-   Since at least one platform (POSIX) uses the same symbols for its own "seek"
-   function, we use whatever the host defines (if it does define them).
-*/
-#define _PDCLIB_SEEK_SET 0
-#define _PDCLIB_SEEK_CUR 1
-#define _PDCLIB_SEEK_END 2
-
-/* The number of characters that can be buffered with ungetc(). The standard
-   guarantees only one (1); anything larger would make applications relying on
-   this capability dependent on implementation-defined behaviour (not good).
-*/
-#define _PDCLIB_UNGETCBUFSIZE 1
-
-/* errno -------------------------------------------------------------------- */
-
-/* These are the values that _PDCLIB_errno can be set to by the library.
-
-   By keeping PDCLib's errno in the _PDCLIB_* namespace, the library is capable
-   to "translate" between errno values used by the hosting operating system and
-   those used and passed out by the library.
-
-   Example: In the example platform, the remove() function uses the unlink()
-   system call as backend. Linux sets its errno to EISDIR if you try to unlink()
-   a directory, but POSIX demands EPERM. Within the remove() function, you can
-   catch the 'errno == EISDIR', and set '_PDCLIB_errno = _PDCLIB_EPERM'. Anyone
-   using PDCLib's <errno.h> will "see" EPERM instead of EISDIR (the _PDCLIB_*
-   prefix removed by <errno.h> mechanics).
-
-   If you do not want that kind of translation, you might want to "match" the
-   values used by PDCLib with those used by the host OS, as to avoid confusion.
-
-   The standard only defines three distinct errno values: ERANGE, EDOM, and
-   EILSEQ. The standard leaves it up to "the implementation" whether there are
-   any more beyond those three. There is some controversy as to whether errno is
-   such a good idea at all, so you might want to come up with a different error
-   reporting facility for your platform. Since errno values beyond the three
-   defined by the standard are not portable anyway (unless you look at POSIX),
-   having your own error reporting facility would not hurt anybody either.
-*/
-#define _PDCLIB_ERANGE 1
-#define _PDCLIB_EDOM   2
-#define _PDCLIB_EILSEQ 3
-
-/* The following is not strictly "configuration", but there is no better place
-   to explain it than here.
-
-   PDCLib strives to be as generic as possible, so by default it does NOT define
-   any values beyond the three standard ones above, even where it would have
-   been prudent and convenient to do so. Any errno "caught" from the host OS,
-   and some internal error conditions as well, are all lumped together into the
-   value of '_PDCLIB_ERROR'.
-
-   '_PDCLIB_ERROR' is STRICLY meant as a PLACEHOLDER only.
-
-   You should NEVER ship an adaption of PDCLib still using that particular
-   value. You should NEVER write code that *tests* for that value. Indeed it is
-   not even conforming, since errno values should be defined as beginning with
-   an uppercase 'E', and there is no mechanics in <errno.h> to unmask that
-   particular value (for exactly that reason).
-
-   There also is no error message available for this value through either the
-   strerror() or perror() functions. It is being reported as "unknown" error.
-
-   The idea is that you scan the source of PDCLib for occurrences of this macro
-   and replace _PDCLIB_ERROR with whatever additional errno value you came up
-   with for your platform.
-
-   If you cannot find it within you to do that, tell your clients to check for
-   an errno value larger than zero. That, at least, would be standard compliant
-   (and fully portable).
-*/
-#define _PDCLIB_ERROR  4
-
-/* The maximum value that errno can be set to. This is used to set the size   */
-/* of the array in struct _PDCLIB_lc_text_t holding error messages for the    */
-/* strerror() and perror() functions. (If you change this value because you   */
-/* are using additional errno values, you *HAVE* to provide appropriate error */
-/* messages for *ALL* locales.)                                               */
-/* Default is 4 (0, ERANGE, EDOM, EILSEQ).                                    */
-#define _PDCLIB_ERRNO_MAX 4
-
-/* locale data -------------------------------------------------------------- */
-
-/* The default path where PDCLib should look for its locale data.             */
-/* Must end with the appropriate separator character.                         */
-#define _PDCLIB_LOCALE_PATH "/usr/share/pdclib/i18n"
-
-/* The name of the environment variable that can be used to override that     */
-/* path setting.                                                              */
-#define _PDCLIB_LOCALE_PATH_ENV PDCLIB_I18N
-
-#ifdef __CYGWIN__
-typedef unsigned int wint_t;
-#endif
-
-
-#endif

src/pdclib/platform/example/include/signal.h

@@ -1,84 +0,0 @@
-/* Signal handling <string.h>
-
-   This file is part of the Public Domain C Library (PDCLib).
-   Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#ifndef _PDCLIB_SIGNAL_H
-#define _PDCLIB_SIGNAL_H _PDCLIB_SIGNAL_H
-
-#include "pdclib/_PDCLIB_config.h"
-
-/* Signals ------------------------------------------------------------------ */
-
-/* A word on signals, to the people using PDCLib in their OS projects.
-
-   The definitions of the C standard leave about everything that *could* be
-   useful to be "implementation defined". Without additional, non-standard
-   arrangements, it is not possible to turn them into a useful tool.
-
-   This example implementation chose to "not generate any of these signals,
-   except as a result of explicit calls to the raise function", which is
-   allowed by the standard but of course does nothing for the usefulness of
-   <signal.h>.
-
-   A useful signal handling would:
-   1) make signal() a system call that registers the signal handler with the OS
-   2) make raise() a system call triggering an OS signal to the running process
-   3) make provisions that further signals of the same type are blocked until
-      the signal handler returns (optional for SIGILL)
-*/
-
-/* These are the values used by Linux. */
-
-/* Abnormal termination / abort() */
-#define SIGABRT 6
-/* Arithmetic exception / division by zero / overflow */
-#define SIGFPE  8
-/* Illegal instruction */
-#define SIGILL  4
-/* Interactive attention signal */
-#define SIGINT  2
-/* Invalid memory access */
-#define SIGSEGV 11
-/* Termination request */
-#define SIGTERM 15
-
-/* The following should be defined to pointer values that could NEVER point to
-   a valid signal handler function. (They are used as special arguments to
-   signal().) Again, these are the values used by Linux.
-*/
-#define SIG_DFL (void (*)( int ))0
-#define SIG_ERR (void (*)( int ))-1
-#define SIG_IGN (void (*)( int ))1
-
-typedef _PDCLIB_sig_atomic sig_atomic_t;
-
-/* Installs a signal handler "func" for the given signal.
-   A signal handler is a function that takes an integer as argument (the signal
-   number) and returns void.
-
-   Note that a signal handler can do very little else than:
-   1) assign a value to a static object of type "volatile sig_atomic_t",
-   2) call signal() with the value of sig equal to the signal received,
-   3) call _Exit(),
-   4) call abort().
-   Virtually everything else is undefind.
-
-   The signal() function returns the previous installed signal handler, which
-   at program start may be SIG_DFL or SIG_ILL. (This implementation uses
-   SIG_DFL for all handlers.) If the request cannot be honored, SIG_ERR is
-   returned and errno is set to an unspecified positive value.
-*/
-void (*signal( int sig, void (*func)( int ) ) )( int );
-
-/* Raises the given signal (executing the registered signal handler with the
-   given signal number as parameter).
-   This implementation does not prevent further signals of the same time from
-   occuring, but executes signal( sig, SIG_DFL ) before entering the signal
-   handler (i.e., a second signal before the signal handler re-registers itself
-   or SIG_IGN will end the program).
-   Returns zero if successful, nonzero otherwise. */
-int raise( int sig );
-
-#endif

src/pdclib/platform/stmos/functions/_PDCLIB/_PDCLIB_allocpages.c

@@ -17,43 +17,47 @@
 
 #include "pdclib/_PDCLIB_glue.h"
 
-static void * membreak = NULL;
+//static void * membreak = NULL;
 
 void * _PDCLIB_allocpages( int const n )
 {
-    void * oldbreak;
-    if ( membreak == NULL )
-    {
-        /* first call, make sure end-of-heap is page-aligned */
-        intptr_t unaligned = 0;
-        membreak = sbrk( 0 );
-        unaligned = _PDCLIB_PAGESIZE - (intptr_t)membreak % _PDCLIB_PAGESIZE;
-        if ( unaligned < _PDCLIB_PAGESIZE )
-        {
-            /* end-of-heap not page-aligned - adjust */
-            if ( sbrk( unaligned ) != membreak )
-            {
-                /* error */
-                return NULL;
-            }
-            membreak = (char *)membreak + unaligned;
-        }
-    }
-    /* increasing or decreasing heap - standard operation */
-    oldbreak = membreak;
-    membreak = (void *)( (char *)membreak + ( n * _PDCLIB_PAGESIZE ) );
+	// TODO eek
+	// sbrk actually mallocs (kernel side)
+	return sbrk(n * _PDCLIB_PAGESIZE);
 
-    if ( sbrk( (char*)membreak - (char*)oldbreak ) == membreak )
-    {
-        /* successful */
-        return oldbreak;
-    }
-    else
-    {
-        /* out of memory */
-        membreak = oldbreak;
-        return NULL;
-    }
+//    void * oldbreak;
+//    if ( membreak == NULL )
+//    {
+//        /* first call, make sure end-of-heap is page-aligned */
+//        intptr_t unaligned = 0;
+//        membreak = sbrk( 0 );
+//        unaligned = _PDCLIB_PAGESIZE - (intptr_t)membreak % _PDCLIB_PAGESIZE;
+//        if ( unaligned < _PDCLIB_PAGESIZE )
+//        {
+//            /* end-of-heap not page-aligned - adjust */
+//            if ( sbrk( unaligned ) != membreak )
+//            {
+//                /* error */
+//                return NULL;
+//            }
+//            membreak = (char *)membreak + unaligned;
+//        }
+//    }
+//    /* increasing or decreasing heap - standard operation */
+//    oldbreak = membreak;
+//    membreak = (void *)( (char *)membreak + ( n * _PDCLIB_PAGESIZE ) );
+//
+//    if ( sbrk( (char*)membreak - (char*)oldbreak ) == membreak )
+//    {
+//        /* successful */
+//        return oldbreak;
+//    }
+//    else
+//    {
+//        /* out of memory */
+//        membreak = oldbreak;
+//        return NULL;
+//    }
 }
 
 #endif

src/pdclib/platform/stmos/functions/_PDCLIB/_PDCLIB_stdinit.c

@@ -19,24 +19,42 @@
    descriptors 0, 1, and 2 respectively.
 */
 /* TODO: This is proof-of-concept, requires finetuning. */
-static char _PDCLIB_sin_buffer[BUFSIZ];
-static char _PDCLIB_sout_buffer[BUFSIZ];
-static char _PDCLIB_serr_buffer[BUFSIZ];
+/*static char _PDCLIB_serr_buf[BUFSIZ];
+static char _PDCLIB_sout_buf[BUFSIZ];
+static char _PDCLIB_sin_buf[BUFSIZ];
+static unsigned char _PDCLIB_serr_unget[_PDCLIB_UNGETCBUFSIZE];
+static unsigned char _PDCLIB_sout_unget[_PDCLIB_UNGETCBUFSIZE];
+static unsigned char _PDCLIB_sin_unget[_PDCLIB_UNGETCBUFSIZE];
 
-static unsigned char _PDCLIB_sin_ungetbuf[_PDCLIB_UNGETCBUFSIZE];
-static unsigned char _PDCLIB_sout_ungetbuf[_PDCLIB_UNGETCBUFSIZE];
-static unsigned char _PDCLIB_serr_ungetbuf[_PDCLIB_UNGETCBUFSIZE];
-
-static struct _PDCLIB_file_t _PDCLIB_serr = { 2, _PDCLIB_serr_buffer, BUFSIZ, 0, 0, { 0, 0 }, 0, _PDCLIB_serr_ungetbuf, _IONBF | _PDCLIB_FWRITE | _PDCLIB_STATIC, NULL, NULL };
-static struct _PDCLIB_file_t _PDCLIB_sout = { 1, _PDCLIB_sout_buffer, BUFSIZ, 0, 0, { 0, 0 }, 0, _PDCLIB_sout_ungetbuf, _IOLBF | _PDCLIB_FWRITE | _PDCLIB_STATIC, NULL, &_PDCLIB_serr };
-static struct _PDCLIB_file_t _PDCLIB_sin  = { 0, _PDCLIB_sin_buffer, BUFSIZ, 0, 0, { 0, 0 }, 0, _PDCLIB_sin_ungetbuf, _IOLBF | _PDCLIB_FREAD | _PDCLIB_STATIC, NULL, &_PDCLIB_sout };
+static struct _PDCLIB_file_t _PDCLIB_serr = {
+	2,
+	_PDCLIB_serr_buf, BUFSIZ, 0, 0,{ 0, 0 },
+	0, _PDCLIB_serr_unget,
+	_IOLBF | _PDCLIB_FWRITE | _PDCLIB_STATIC,
+	NULL, NULL
+};
+static struct _PDCLIB_file_t _PDCLIB_sout = {
+	1,
+	_PDCLIB_sout_buf, BUFSIZ, 0, 0,{ 0, 0 },
+	0, _PDCLIB_sout_unget,
+	_IOLBF | _PDCLIB_FWRITE | _PDCLIB_STATIC,
+	NULL, &_PDCLIB_serr
+};
+static struct _PDCLIB_file_t _PDCLIB_sin = {
+	0,
+	_PDCLIB_sin_buf, BUFSIZ, 0, 0,{ 0, 0 },
+	0, _PDCLIB_sin_unget,
+	_IOLBF | _PDCLIB_FREAD | _PDCLIB_STATIC,
+	NULL, &_PDCLIB_sout
+};*/
 
-struct _PDCLIB_file_t * stdin  = &_PDCLIB_sin;
-struct _PDCLIB_file_t * stdout = &_PDCLIB_sout;
-struct _PDCLIB_file_t * stderr = &_PDCLIB_serr;
+struct _PDCLIB_file_t *stdin  = 0;//&_PDCLIB_sin;
+struct _PDCLIB_file_t *stdout = 0;//&_PDCLIB_sout;
+struct _PDCLIB_file_t *stderr = 0;//&_PDCLIB_serr;
 
 /* FIXME: This approach is a possible attack vector. */
-struct _PDCLIB_file_t * _PDCLIB_filelist = &_PDCLIB_sin;
+// TODO used by remove/tmpfile
+struct _PDCLIB_file_t *_PDCLIB_filelist = 0;//&_PDCLIB_sin;
 
 /* "C" locale - defaulting to ASCII-7.
    1 kByte (+ 4 byte) of <ctype.h> data.

src/pdclib/platform/stmos/functions/os/syscalls.c

@@ -39,7 +39,7 @@ int getpid(void)
 
 void *sbrk(unsigned int bytes)
 {
-	void *ret = 0;
+	uint32_t ret = 0;
 	register uint32_t r1 __asm("r1") = bytes;
 	register uint32_t r2 __asm("r2") = (uint32_t)&ret;
 	__asm("\
@@ -48,7 +48,30 @@ void *sbrk(unsigned int bytes)
 		mov r2, %1; \
 		svc 0; \
 	" :: "r" (r1), "r" (r2));
-	return ret;
+	__asm("mov %0, r2" : "=r" (ret));
+	return *((void **)ret);
+}
+
+int execve(const char *file, char * const argv[], char * const envp[])
+{
+	volatile uint32_t ret = 0;
+	register uint32_t r1 __asm("r1") = (uint32_t)file;
+	register uint32_t r2 __asm("r2") = (uint32_t)argv;
+	register uint32_t r3 __asm("r3") = (uint32_t)envp;
+	register uint32_t r12 __asm("r12") = (uint32_t)&ret;
+	__asm("\
+		mov r0, 5; \
+		mov r1, %0; \
+		mov r2, %1; \
+		mov r3, %2; \
+		mov r12, %3; \
+		svc 0; \
+	" :: "r" (r1), "r" (r2), "r" (r3), "r" (r12));
+
+	if (ret == (uint32_t)-1)
+		return ret;
+
+	((void (*)(void))ret)();
 }
 
 //
@@ -131,15 +154,15 @@ int read(int fd, uint32_t count, uint8_t *buffer)
 	register uint32_t r1 __asm("r1") = fd;
 	register uint32_t r2 __asm("r2") = count;
 	register uint32_t r3 __asm("r3") = (uint32_t)buffer;
-	register uint32_t r4 __asm("r4") = (uint32_t)&ret;
+	register uint32_t r12 __asm("r12") = (uint32_t)&ret;
 	__asm("\
 		mov r0, 3; \
 		mov r1, %0; \
 		mov r2, %1; \
 		mov r3, %2; \
-		mov r4, %3; \
+		mov r12, %3; \
 		svc 3; \
-	" :: "r" (r1), "r" (r2), "r" (r3), "r" (r4));
+	" :: "r" (r1), "r" (r2), "r" (r3), "r" (r12));
 	return ret;
 }
 
@@ -149,15 +172,15 @@ int write(int fd, uint32_t count, const uint8_t *buffer)
 	register uint32_t r1 __asm("r1") = fd;
 	register uint32_t r2 __asm("r2") = count;
 	register uint32_t r3 __asm("r3") = (uint32_t)buffer;
-	register uint32_t r4 __asm("r4") = (uint32_t)&ret;
+	register uint32_t r12 __asm("r12") = (uint32_t)&ret;
 	__asm("\
 		mov r0, 4; \
 		mov r1, %0; \
 		mov r2, %1; \
 		mov r3, %2; \
-		mov r4, %3; \
+		mov r12, %3; \
 		svc 3; \
-	" :: "r" (r1), "r" (r2), "r" (r3), "r" (r4));
+	" :: "r" (r1), "r" (r2), "r" (r3), "r" (r12));
 	return ret;
 }
 

src/pdclib/platform/stmos/include/syscalls.h

@@ -16,6 +16,7 @@ void _exit(int code);
 int fork(void);
 int getpid(void);
 void *sbrk(unsigned int bytes);
+int execve(const char *file, char * const argv[], char * const envp[]);
 
 //
 // Clock-related calls

src/user/Makefile

@@ -1,9 +1,29 @@
+##
+# @file Makefile
+# Script to build folder of source files
+#
+# Copyright (C) 2018 Clyne Sullivan
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
 CFILES = $(wildcard *.c)
 AFILES = $(wildcard *.s) 
 OFILES = $(patsubst %.c, %.o, $(CFILES)) \
 	 $(patsubst %.s, %.asm.o, $(AFILES))
 
-CFLAGS += -I.. -I../arch/cmsis
+CFLAGS += -ffreestanding -nostdlib -I.. -I../arch/cmsis
 
 all: $(OFILES)
 

src/user/priv_gpio.h

@@ -1,58 +0,0 @@
-/**
- * @file priv_gpio.h
- * GPIO access for unpriviledged processes
- *
- * Copyright (C) 2018 Clyne Sullivan
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-#ifndef PRIV_GPIO_H_
-#define PRIV_GPIO_H_
-
-// For value flags
-#include <kernel/gpio.h>
-
-/**
- * Possible GPIO calls.
- */
-enum GPIO_CALLS {
-	GPIO_MODE = 0, /**< Change GPIO mode */
-	GPIO_TYPE, /**< Change GPIO type (PuPd/ODrain) */
-	GPIO_PUPD, /**< Set/clear pullup/pulldown */
-	GPIO_SPEED, /**< Set GPIO speed */
-	GPIO_OUT, /**< Set GPIO output state */
-};
-
-/**
- * Provides unpriviledged GPIO access.
- * @param call The type of GPIO call to make
- * @param pin The pin to modify (0-15 = A, 16-31 = B, ...)
- * @param value The value to pass to the call
- */
-void gpio(uint32_t call, uint32_t pin, uint32_t value) 
-{
-	register uint32_t r0 asm("r0") = call;
-	register uint32_t r1 asm("r1") = pin;
-	register uint32_t r2 asm("r2") = value;
-
-	asm("\
-		mov r0, %0; \
-		mov r1, %1; \
-		mov r2, %2; \
-		svc 1; \
-	" :: "r" (r0), "r" (r1), "r" (r2));
-}
-
-#endif // PRIV_GPIO_H_

src/user/user.c

@@ -1,41 +1,29 @@
-#include "priv_gpio.h"
+/**
+ * @file user.c
+ * Userspace entry
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
 
-#include <kernel/clock.h>
-#include <kernel/heap.h>
-#include <kernel/vfs.h>
-
-void user_delay(uint32_t ms)
-{
-	register uint32_t r1 asm("r1") = ms;
-
-	asm("\
-		mov r0, 0; \
-		mov r1, %0; \
-		svc 2; \
-	" :: "r" (r1));
-}
+#include <syscalls.h>
+#include <stdio.h>
 
 void user_main(void)
 {
-	gpio(GPIO_MODE, 5, OUTPUT);
-
-	int test = vfs_open("B:/hello", VFS_FILE_READ);
-	char *buf = malloc(20);
-	int count = vfs_read(test, 20, (uint8_t *)buf);
-	buf[count] = '\0';
-	vfs_close(test);
-
-//	if (fork() == 0) {
-//		while (1) {
-//			gpio(GPIO_OUT, 5, 1);
-//			user_delay(2000);
-//		}
-//	} else {
-//		while (1) {
-//			user_delay(1000);
-//			gpio(GPIO_OUT, 5, 0);
-//			user_delay(1000);
-//		}
-//	}
+	//gpio(GPIO_MODE, 5, OUTPUT);
+	execve("B:/init", 0, 0);
 }