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(uxnasm) Added ishex() macro

This commit is contained in:
Devine Lu Linvega 2024-03-28 17:22:05 -07:00
parent 5e593e7931
commit fe515570a2
1 changed files with 9 additions and 10 deletions
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19
src/uxnasm.c
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@ -37,16 +37,16 @@ static char ops[][4] = {
"ADD", "SUB", "MUL", "DIV", "AND", "ORA", "EOR", "SFT"
};
static int cndx(char *s, char t) { int i = 0; char c; while((c = *s++)) { if(c == t) return i; i++; } return -1; } /* chr in str */
static int sihx(char *s) { char c; while((c = *s++)) if(cndx(hexad, c) < 0) return 0; return 1; } /* str is hex */
static int shex(char *s) { int n = 0; char c; while((c = *s++)) { n = n << 4, n |= cndx(hexad, c); } return n; } /* str to num */
static int find(char *s, char t) { int i = 0; char c; while((c = *s++)) { if(c == t) return i; i++; } return -1; } /* chr in str */
static int shex(char *s) { int n = 0; char c; while((c = *s++)) { if(find(hexad, c) < 0) return -1; n = n << 4, n |= find(hexad, c); } return n; } /* str to hex */
static int scmp(char *a, char *b, int len) { int i = 0; while(a[i] == b[i]) if(!a[i] || ++i >= len) return 1; return 0; } /* str compare */
static char *scpy(char *src, char *dst, int len) { int i = 0; while((dst[i] = src[i]) && i < len - 2) i++; dst[i + 1] = '\0'; return dst; } /* str copy */
static char *save(char *s, char c) { char *o = dictnext; while((*dictnext++ = *s++) && *s); *dictnext++ = c; return o; } /* save to dict */
static char *join(char *a, char j, char *b) { char *res = dictnext; save(a, j), save(b, 0); return res; } /* join two str */
#define isopcode(x) (findopcode(x) || scmp(x, "BRK", 4))
#define isinvalid(x) (!x[0] || sihx(x) || isopcode(x) || cndx(runes, x[0]) >= 0)
#define ishex(x) (shex(x) >= 0)
#define isopc(x) (findopcode(x) || scmp(x, "BRK", 4))
#define isinvalid(x) (!x[0] || ishex(x) || isopc(x) || find(runes, x[0]) >= 0)
#define writeshort(x) (writebyte(x >> 8, ctx) && writebyte(x & 0xff, ctx))
#define findlabel(x) finditem(x, labels, labels_len)
#define findmacro(x) finditem(x, macros, macro_len)
@ -227,13 +227,12 @@ makeref(char *label, char rune, Uint16 addr)
return 1;
}
static int
writepad(char *w)
{
Item *l;
int rel = w[0] == '$' ? ptr : 0;
if(sihx(w + 1)) {
if(ishex(w + 1)) {
ptr = shex(w + 1) + rel;
return 1;
}
@ -306,7 +305,7 @@ parse(char *w, FILE *f, Context *ctx)
case '@': return !makelabel(w + 1, 1, ctx) ? error_asm("Invalid label") : 1;
case '&': return !makelabel(w, 0, ctx) ? error_asm("Invalid sublabel") : 1;
case '}': return !makelabel(makelambda(lambda_stack[--lambda_ptr]), 0, ctx) ? error_asm("Invalid label") : 1;
case '#': return !sihx(w + 1) || !writehex(w, ctx) ? error_asm("Invalid hexadecimal") : 1;
case '#': return !ishex(w + 1) || !writehex(w, ctx) ? error_asm("Invalid hexadecimal") : 1;
case '_': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
case ',': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
case '-': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
@ -323,8 +322,8 @@ parse(char *w, FILE *f, Context *ctx)
case '[':
case ']': return 1;
}
if(sihx(w)) return writehex(w, ctx);
if(isopcode(w)) return writebyte(findopcode(w), ctx);
if(ishex(w)) return writehex(w, ctx);
if(isopc(w)) return writebyte(findopcode(w), ctx);
if((m = findmacro(w))) return walkmacro(m, ctx);
return makeref(w, ' ', ptr + 1) && writebyte(0x60, ctx) && writeshort(0xffff);
}