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754 lines
15 KiB
C
754 lines
15 KiB
C
#include <parser.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAX_VARS 32
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#define MAX_STACK 32
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#define INT(v) (*((int32_t *)&v->value))
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#define FLOAT(v) (*((float *)&v->value))
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static char *str_func = "(func)";
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static char *str_undef = "(undefined)";
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char *strclone(const char *s)
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{
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char *clone = (char *)malloc(strlen(s) + 1);
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strcpy(clone, s);
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return clone;
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}
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char *strnclone(const char *s, uint32_t n)
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{
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char *clone = (char *)malloc(n + 1);
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strncpy(clone, s, n);
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return clone;
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}
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void fsetstr(variable *f)
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{
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if (f->svalue == 0)
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f->svalue = (char *)malloc(16);
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snprintf(f->svalue, 16, "%f", FLOAT(f));
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}
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void isetstr(variable *i)
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{
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if (i->svalue == 0)
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i->svalue = (char *)malloc(12);
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snprintf(i->svalue, 12, "%d", INT(i));
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}
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uint8_t eol(int c)
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{
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return c == '\n' || c == '\0';
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}
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uint8_t eot(int c)
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{
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return eol(c) || c == ' ';
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}
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uint8_t eoe(int c)
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{
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return eol(c) || c == ')';
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}
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uint32_t findend(const char *s, char o, char c)
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{
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uint8_t indent = 0;
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uint32_t i;
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for (i = 1; !eol(s[i]); i++) {
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if (s[i] == o) {
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indent++;
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} else if (s[i] == c) {
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if (indent == 0)
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break;
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else
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indent--;
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}
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}
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return i;
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}
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void skipblank(const char *s, uint8_t (*cmp)(int), uint32_t *offset)
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{
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uint32_t i = *offset;
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while (!cmp(s[i])) {
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if (s[i] != ' ' && s[i] != '\t')
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break;
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i++;
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}
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*offset = i;
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}
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int ifunc_set(interpreter *it);
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int ifunc_jmp(interpreter *it);
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int ifunc_label(interpreter *it);
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int ifunc_end(interpreter *it);
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int ifunc_if(interpreter *it);
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int ifunc_do(interpreter *it);
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int ifunc_while(interpreter *it);
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variable *idoexpr(interpreter *interp, const char *line);
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variable *itostring(variable *v);
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variable *itoint(variable *v);
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variable *itofloat(variable *v);
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void iinit(interpreter *interp)
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{
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interp->vars = (variable *)calloc(MAX_VARS, sizeof(variable));
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interp->vnames = (char **)calloc(MAX_VARS, sizeof(char *));
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interp->stack = (stack_t *)calloc(MAX_STACK, sizeof(stack_t));
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interp->stidx = 0;
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interp->lines = (char **)calloc(20, sizeof(char *));
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interp->lnidx = 0;
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interp->indent = 0;
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inew_cfunc(interp, "set", ifunc_set);
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inew_cfunc(interp, "jmp", ifunc_jmp);
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inew_cfunc(interp, "func", ifunc_label);
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inew_cfunc(interp, "end", ifunc_end);
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inew_cfunc(interp, "if", ifunc_if);
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inew_cfunc(interp, "do", ifunc_do);
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inew_cfunc(interp, "while", ifunc_while);
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}
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void ipush(interpreter *it, void *v)
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{
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it->stack[it->stidx++] = v;
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}
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void *ipop(interpreter *it)
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{
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return it->stack[--it->stidx];
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}
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variable *interpreter_get_variable(interpreter *interp, const char *name)
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{
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for (uint32_t i = 0; i < MAX_VARS; i++) {
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if (!interp->vars[i].used) {
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variable *v = &interp->vars[i];
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v->used = 1;
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v->fromc = 0;
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v->valtype = STRING;
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v->value = 0;
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v->svalue = str_undef;
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interp->vnames[i] = strclone(name);
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return v;
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} else if (interp->vnames[i] != 0 && !strcmp(interp->vnames[i], name)) {
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return &interp->vars[i];
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}
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}
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return 0;
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}
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char *interpreter_get_name(interpreter *interp, variable *v)
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{
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for (uint32_t i = 0; i < MAX_VARS; i++) {
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if (v == &interp->vars[i])
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return interp->vnames[i];
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}
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return str_undef;
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}
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void inew_string(interpreter *interp, const char *name, char *value)
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{
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variable *v = interpreter_get_variable(interp, name);
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if (v != 0) {
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v->valtype = STRING;
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INT(v) = 0;
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v->svalue = strclone(value);
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}
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}
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void inew_integer(interpreter *interp, const char *name, int32_t value)
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{
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variable *v = interpreter_get_variable(interp, name);
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if (v != 0) {
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v->valtype = INTEGER;
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INT(v) = value;
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isetstr(v);
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}
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}
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void inew_float(interpreter *interp, const char *name, float value)
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{
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variable *v = interpreter_get_variable(interp, name);
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if (v != 0) {
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v->valtype = FLOAT;
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FLOAT(v) = value;
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fsetstr(v);
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}
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}
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void inew_cfunc(interpreter *interp, const char *name, func_t func)
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{
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variable *v = interpreter_get_variable(interp, name);
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if (v != 0) {
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v->fromc = 1;
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v->valtype = FUNC;
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v->value = (uint32_t)func;
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v->svalue = str_func;
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}
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}
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variable *make_var(interpreter *interp, const char *line, uint32_t *next)
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{
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if (line[0] == '\"') { // string literal
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uint32_t end = 1;
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while (!eol(line[end])) {
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if (line[end] == '\"'/* && line[end - 1] != '\\'*/) {
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if (!eot(line[end + 1]))
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return 0;
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// TODO string breakdown
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variable *v = (variable *)malloc(sizeof(variable));
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v->used = 0;
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v->valtype = STRING;
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v->svalue = strnclone(line + 1, end - 1);
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*next = end + 1;
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return v;
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}
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end++;
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}
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return 0;
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} else if (line[0] == '(') { // equation literal
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uint32_t end = findend(line, '(', ')');
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if (eot(line[end]))
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return 0;
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*next = end + 1;
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return idoexpr(interp, line + 1);
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} else if (isalpha(line[0])) { // variable/func
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uint32_t end = 1;
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for (; isalnum(line[end]); end++);
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if (!eot(line[end]))
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return 0;
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char *name = (char *)malloc(end + 1);
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strncpy(name, line, end);
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name[end] = '\0';
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*next = end;
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return interpreter_get_variable(interp, name);
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} else if (isdigit(line[0])) { // number
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uint32_t end = 1;
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uint8_t dec = 0;
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for (; !eot(line[end]); end++) {
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if (!isdigit(line[end])) {
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if (line[end] == '.') {
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if (!dec)
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dec = 1;
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else
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return 0;
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} else {
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return 0;
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}
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}
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}
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variable *v = (variable *)malloc(sizeof(variable));
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v->used = 0;
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if (dec) {
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v->valtype = FLOAT;
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FLOAT(v) = strtof(line, 0);
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fsetstr(v);
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} else {
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v->valtype = INTEGER;
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INT(v) = atoi(line);
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isetstr(v);
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}
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*next = end;
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return v;
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}
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return 0;
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}
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int idoline(interpreter *interp, const char *line)
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{
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variable *ops[8];
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uint32_t ooffset, offset, next;
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interp->lines[interp->lnidx] = strclone(line);
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loop:
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if (line[0] == '#') {
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goto norun;
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} else if (interp->indent > 0) {
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if (!strcmp(line, "end"))
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interp->indent--;
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goto norun;
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}
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ooffset = 0;
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offset = 0;
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// step 1 - convert to tokens
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skipblank(line, eol, &offset);
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while (!eol(line[offset])) {
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ops[ooffset] = make_var(interp, line + offset, &next);
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if (ops[ooffset] == 0) {
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return -4;
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} else {
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ooffset++;
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offset += next;
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}
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skipblank(line, eol, &offset);
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}
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// step 2 - execute
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if (ooffset == 0)
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return -1;
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if (ops[0]->valtype != FUNC)
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return -2;
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if (ops[0]->value == 0)
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return -3;
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for (uint32_t i = ooffset; --i > 0;)
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ipush(interp, ops[i]);
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if (ops[0]->fromc) {
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int ret = ((func_t)ops[0]->value)(interp);
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if (ret != 0)
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return ret;
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} else {
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ipush(interp, (void *)(interp->lnidx + 1));
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interp->lnidx = ops[0]->value;
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}
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interp->stidx -= ooffset - 1;
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if ((int32_t)interp->stidx < 0) {
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interp->stidx = 0;
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return -5;
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}
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for (uint32_t i = 0; i < ooffset; i++) {
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if (!ops[i]->used)
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free(ops[i]);
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}
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norun:
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interp->lnidx++;
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if (interp->lines[interp->lnidx] != 0) {
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line = interp->lines[interp->lnidx];
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goto loop;
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}
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return 0;
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}
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typedef void (*operation_t)(variable *, variable *, variable *);
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#define IOPS_COUNT 15
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static char *iops[IOPS_COUNT] = {
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"+", "-", "*", "/", "&", "|", "^", ">>", "<<",
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"==", "<", ">", "<=", ">=", "!="
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};
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void iop_add(variable *, variable *, variable *);
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void iop_sub(variable *, variable *, variable *);
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void iop_mult(variable *, variable *, variable *);
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void iop_div(variable *, variable *, variable *);
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void iop_and(variable *, variable *, variable *);
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void iop_or(variable *, variable *, variable *);
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void iop_xor(variable *, variable *, variable *);
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void iop_shr(variable *, variable *, variable *);
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void iop_shl(variable *, variable *, variable *);
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void iop_eq(variable *, variable *, variable *);
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void iop_lt(variable *, variable *, variable *);
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void iop_gt(variable *, variable *, variable *);
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void iop_lte(variable *, variable *, variable *);
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void iop_gte(variable *, variable *, variable *);
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void iop_ne(variable *, variable *, variable *);
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static operation_t iopfuncs[IOPS_COUNT] = {
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iop_add, iop_sub, iop_mult, iop_div, iop_and,
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iop_or, iop_xor, iop_shr, iop_shl,
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iop_eq, iop_lt, iop_gt, iop_lte, iop_gte, iop_ne
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};
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variable *idoexpr(interpreter *interp, const char *line)
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{
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variable *result = (variable *)malloc(sizeof(variable));
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char *mline = line;
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void *ops[16];
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uint32_t ooffset = 0;
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uint32_t offset = 0;
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uint32_t next;
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// step 1 - break apart line
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// skip whitespace
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skipblank(line, eol, &offset);
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while (!eoe(line[offset])) {
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if (line[offset] == '(') {
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uint8_t indent = 0;
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uint32_t i;
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for (i = offset + 1; !eol(line[i]); i++) {
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if (line[i] == '(') {
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indent++;
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} else if (line[i] == ')') {
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if (indent == 0) {
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break;
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} else {
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indent--;
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}
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}
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}
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if (eol(line[i]))
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return 0;
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ops[ooffset] = idoexpr(interp, line + offset + 1);
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offset = i + 1;
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} else {
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uint32_t end = offset;
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char cend;
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if (line[offset] != '\"') {
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for (; isalnum(line[end]) || line[end] == '.'; end++);
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cend = line[end];
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mline[end] = ' ';
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}
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ops[ooffset] = make_var(interp, line + offset, &next);
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if (end != 0)
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mline[end] = cend;
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}
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if (ops[ooffset] == 0)
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return 0;
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ooffset++;
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offset += next;
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// skip whitespace
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skipblank(line, eoe, &offset);
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if (eoe(line[offset]))
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break;
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for (uint32_t i = 0; i < IOPS_COUNT; i++) {
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int len = strlen(iops[i]);
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if (!strncmp(iops[i], line + offset, len)) {
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ops[ooffset] = (void *)(i + 1);
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offset += len;
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break;
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}
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}
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if (ops[ooffset] == 0)
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return 0;
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ooffset++;
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// skip whitespace
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skipblank(line, eol, &offset);
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}
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if (ooffset % 2 == 0)
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return 0;
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// step 2 - do operations
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result->valtype = ((variable *)ops[0])->valtype;
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result->value = ((variable *)ops[0])->value;
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for (uint32_t i = 1; i < ooffset; i += 2) {
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iopfuncs[(uint32_t)ops[i] - 1](result, result, ops[i + 1]);
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}
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for (uint32_t i = 0; i < ooffset; i += 2) {
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if (!((variable *)ops[i])->used)
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free(ops[i]);
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}
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if (result->valtype == INTEGER)
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isetstr(result);
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else
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fsetstr(result);
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return result;
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}
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variable *igetarg(interpreter *interp, uint32_t index)
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{
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return interp->stack[interp->stidx - index - 1];
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}
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char *igetarg_string(interpreter *interp, uint32_t index)
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{
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if (index >= interp->stidx)
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return 0;
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variable *v = igetarg(interp, index);
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return v->svalue;
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}
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int igetarg_integer(interpreter *interp, uint32_t index)
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{
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if (index >= interp->stidx)
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return 0;
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variable *v = igetarg(interp, index);
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return INT(itoint(v));
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}
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float igetarg_float(interpreter *interp, uint32_t index)
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{
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if (index >= interp->stidx)
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return 0;
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variable *v = igetarg(interp, index);
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return FLOAT(itofloat(v));
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}
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variable *itostring(variable *v)
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{
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switch (v->valtype) {
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case INTEGER:
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v->valtype = STRING;
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isetstr(v);
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break;
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case FLOAT:
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v->valtype = STRING;
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fsetstr(v);
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break;
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}
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return v;
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}
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variable *itoint(variable *v)
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{
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switch (v->valtype) {
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case STRING:
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v->valtype = INTEGER;
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INT(v) = atoi(v->svalue);
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isetstr(v);
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break;
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case FLOAT:
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v->valtype = INTEGER;
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INT(v) = (int32_t)FLOAT(v);
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isetstr(v);
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break;
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}
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return v;
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}
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variable *itofloat(variable *v)
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{
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switch (v->valtype) {
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case STRING:
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v->valtype = FLOAT;
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FLOAT(v) = strtof(v->svalue, 0);
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fsetstr(v);
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break;
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case INTEGER:
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v->valtype = FLOAT;
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FLOAT(v) = (float)INT(v);
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fsetstr(v);
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break;
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}
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return v;
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}
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/**
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* Builtin functions
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*/
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|
|
int ifunc_set(interpreter *it)
|
|
{
|
|
variable *n = igetarg(it, 0);
|
|
variable *v = igetarg(it, 1);
|
|
|
|
if (n == 0)
|
|
return -1;
|
|
|
|
n->valtype = v->valtype;
|
|
n->value = v->value;
|
|
n->svalue = v->svalue;
|
|
return 0;
|
|
}
|
|
|
|
int ifunc_label(interpreter *it)
|
|
{
|
|
variable *n = igetarg(it, 0);
|
|
|
|
if (n == 0)
|
|
return -1;
|
|
|
|
n->valtype = FUNC;
|
|
n->value = it->lnidx;
|
|
n->svalue = str_func;
|
|
it->indent++;
|
|
return 0;
|
|
}
|
|
|
|
int ifunc_if(interpreter *it)
|
|
{
|
|
int v = igetarg_integer(it, 0);
|
|
if (v == 0)
|
|
it->indent++;
|
|
return 0;
|
|
}
|
|
|
|
int ifunc_end(interpreter *it)
|
|
{
|
|
if (it->stidx > 0) {
|
|
uint32_t line = (uint32_t)ipop(it);
|
|
it->lnidx = line - 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ifunc_jmp(interpreter *it)
|
|
{
|
|
int newidx = igetarg_integer(it, 0);
|
|
ipop(it);
|
|
ipush(it, (void *)(it->lnidx + 1));
|
|
ipush(it, 0);
|
|
it->lnidx = newidx - 1;
|
|
return 0;
|
|
}
|
|
|
|
int ifunc_do(interpreter *it)
|
|
{
|
|
ipush(it, (void *)it->lnidx);
|
|
return 0;
|
|
}
|
|
|
|
int ifunc_while(interpreter *it)
|
|
{
|
|
int c = igetarg_integer(it, 0);
|
|
ipop(it);
|
|
int nidx = (int)ipop(it);
|
|
if (c != 0) {
|
|
ipush(it, (void *)nidx);
|
|
it->lnidx = nidx;
|
|
}
|
|
ipush(it, 0);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Builtin operations
|
|
*/
|
|
|
|
void iop_add(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) + INT(b);
|
|
} else {
|
|
itofloat(a);
|
|
itofloat(b);
|
|
FLOAT(r) = FLOAT(a) + FLOAT(b);
|
|
}
|
|
}
|
|
|
|
void iop_sub(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) - INT(b);
|
|
} else {
|
|
itofloat(a);
|
|
itofloat(b);
|
|
FLOAT(r) = FLOAT(a) - FLOAT(b);
|
|
}
|
|
}
|
|
|
|
void iop_mult(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) * INT(b);
|
|
} else {
|
|
itofloat(a);
|
|
itofloat(b);
|
|
FLOAT(r) = FLOAT(a) * FLOAT(b);
|
|
}
|
|
}
|
|
|
|
void iop_div(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) / INT(b);
|
|
} else {
|
|
itofloat(a);
|
|
itofloat(b);
|
|
FLOAT(r) = FLOAT(a) / FLOAT(b);
|
|
}
|
|
}
|
|
|
|
void iop_and(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) & INT(b);
|
|
}
|
|
}
|
|
|
|
void iop_or(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) | INT(b);
|
|
}
|
|
}
|
|
|
|
void iop_xor(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) ^ INT(b);
|
|
}
|
|
}
|
|
|
|
void iop_shr(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) >> INT(b);
|
|
}
|
|
}
|
|
|
|
void iop_shl(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER) {
|
|
INT(r) = INT(a) << INT(b);
|
|
}
|
|
}
|
|
|
|
void iop_eq(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER)
|
|
INT(r) = INT(a) == INT(b);
|
|
else
|
|
INT(r) = FLOAT(a) == FLOAT(b);
|
|
}
|
|
|
|
void iop_lt(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER)
|
|
INT(r) = INT(a) < INT(b);
|
|
else
|
|
INT(r) = FLOAT(a) < FLOAT(b);
|
|
}
|
|
|
|
void iop_gt(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER)
|
|
INT(r) = INT(a) > INT(b);
|
|
else
|
|
INT(r) = FLOAT(a) > FLOAT(b);
|
|
}
|
|
|
|
void iop_lte(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER)
|
|
INT(r) = INT(a) <= INT(b);
|
|
else
|
|
INT(r) = FLOAT(a) <= FLOAT(b);
|
|
}
|
|
|
|
void iop_gte(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER)
|
|
INT(r) = INT(a) >= INT(b);
|
|
else
|
|
INT(r) = FLOAT(a) >= FLOAT(b);
|
|
}
|
|
|
|
void iop_ne(variable *r, variable *a, variable *b)
|
|
{
|
|
if (a->valtype == INTEGER && b->valtype == INTEGER)
|
|
INT(r) = INT(a) != INT(b);
|
|
else
|
|
INT(r) = FLOAT(a) != FLOAT(b);
|
|
}
|
|
|