local num parsing; base

foci.c

@@ -16,8 +16,6 @@
 
 #include "foci.h"
 
-#include <stdlib.h> // strtol
-
 #define END_OF(arr) ((arr) + (sizeof((arr)) / sizeof(*(arr))))
 
 static intptr_t dstack[32];
@@ -26,7 +24,7 @@ static intptr_t dict[8192] = {
     0, 10
 };
 #define state dict[0]
-#define base  dict[1]
+#define BASE  dict[1]
 #define begin dict[2]
 static intptr_t *here = &begin;
 static struct word_t *latest;
@@ -71,19 +69,23 @@ int compare(const char *a, const char *b, int l)
     return 0;
 }
 
+struct word_t *lookup_p(const char *s, int len)
+{
+    for (struct word_t *l = latest; l; l = l->prev) {
+        if (len == (l->attr & ATTR_LEN) && !compare(s, l->name, len))
+            return l;
+    }
+
+    return 0;
+}
+
 NAKED
 void lookup()
 {
     static struct word_t *l;
 
     STASH;
-    for (l = latest; l; l = l->prev) {
-        if (*(char *)here == (l->attr & ATTR_LEN) &&
-            !compare((char *)((intptr_t)here + 1), l->name, *(char *)here))
-        {
-            break;
-        }
-    }
+    l = lookup_p((char *)((intptr_t)here + 1), *(char *)here);
     RESTORE;
 
     *--sp = (intptr_t)l;
@@ -116,7 +118,8 @@ W(cell,   "cell",   &w_comma)   LIT(sizeof(*sp)),   END
 W(cellp,  "cell+",  &w_cell)    FTH(cell), add,     END
 W(cells,  "cells",  &w_cellp)   FTH(cell), mul,     END
 W(dict,   "_d",     &w_cells)   LIT(dict),          END
-W(here,   "here",   &w_dict)    LIT(&here), peek,   END
+W(base,   "base",   &w_dict)    LIT(&BASE), END
+W(here,   "here",   &w_base)    LIT(&here), peek,   END
 W(allot,  "allot",  &w_here)    LIT(&here), FTH(addto), END
 W(latest, "latest", &w_allot)   LIT(&latest), peek, END
 W(negate, "negate", &w_latest)  LIT(-1), mul, END
@@ -138,7 +141,9 @@ I(then,   "then",   &w_fif)     FTH(here), LIT(sizeof(intptr_t)), sub, swap, pok
 I(felse,  "else",   &w_then)    LIT(b), comma, FTH(here), LIT(0), comma, swap, FTH(then), END
 W(tick,   "\'",     &w_felse)   compname, drop, lookup, peek, END
 N(execute, "execute", &w_tick)  { pp = (intptr_t **)*sp++ - 1; NEXT; }
-#define LATEST      &w_execute
+W(decimal, "decimal", &w_execute) LIT(10), LIT(&BASE), poke, END
+W(hex,    "hex",    &w_decimal) LIT(16), LIT(&BASE), poke, END
+#define LATEST      &w_hex
 
 void call(void *ptr)
 {
@@ -146,14 +151,27 @@ void call(void *ptr)
     ((void (*)())*pp)();
 }
 
-struct word_t *lookup_p(const char *s, int len)
+intptr_t parse_number(const char *s, const char **endp, int b)
 {
-    for (struct word_t *l = latest; l; l = l->prev) {
-        if (len == (l->attr & ATTR_LEN) && !compare(s, l->name, len))
-            return l;
+    intptr_t n = 0;
+    int neg;
+
+    if (*s == '-') {
+        neg = 1;
+        s++;
+    } else {
+        neg = 0;
     }
 
-    return 0;
+    while (*s >= '0' && *s <= " 0123456789abcdef"[b]) {
+        n *= b;
+        n += *s;
+        n -= *s <= '9' ? '0' : ('a' - 10);
+        s++;
+    }
+
+    *endp = s;
+    return neg ? n * -1 : n;
 }
 
 void parse_word(const char *buf, const char *s)
@@ -166,8 +184,8 @@ void parse_word(const char *buf, const char *s)
     pp = saved_pp;
 
     if (l == 0) {
-        char *end;
-        long n = strtol(buf, &end, base);
+        const char *end;
+        intptr_t n = parse_number(buf, &end, BASE);
         if (*end == '\0') {
             if (state) {
                 *here++ = (intptr_t)push;

main.c

@@ -17,6 +17,7 @@
 #include "foci.h"
 
 #include <ctype.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -55,6 +56,7 @@ int main()
             *s++ = c;
             c = getchar();
         } while (isgraph(c));
+        bool eol = c == '\n' || c == '\r';
         *s = '\0';
 
         if (strcmp(buf, "bye") == 0)
@@ -62,6 +64,7 @@ int main()
 
         parse_word(buf, s);
 
+        if (eol)
             printf(compiling() ? "compiled <%d>\n" : "ok <%d>\n", depth());
     }