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(uxnasm) Disallow runic labels

This commit is contained in:
Devine Lu Linvega 2024-02-25 17:23:49 -08:00
parent 202ca78800
commit 9f1df5f944
1 changed files with 13 additions and 0 deletions
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13
src/uxnasm.c
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@ -55,6 +55,8 @@ static char ops[][4] = {
"ADD", "SUB", "MUL", "DIV", "AND", "ORA", "EOR", "SFT"
};
static char *runes = "|$@&,_.-;=!?#\"%~";
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; } /* string compare */
static int sihx(char *s) { int i = 0; char c; while((c = s[i++])) if(!(c >= '0' && c <= '9') && !(c >= 'a' && c <= 'f')) return 0; return i > 1; } /* string is hexadecimal */
static int shex(char *s) { int n = 0, i = 0; char c; while((c = s[i++])) if(c >= '0' && c <= '9') n = n * 16 + (c - '0'); else if(c >= 'a' && c <= 'f') n = n * 16 + 10 + (c - 'a'); return n; } /* string to num */
@ -156,6 +158,15 @@ makemacro(char *name, FILE *f)
return 1;
}
static int
isrune(char c)
{
char cc, *r = runes;
while((cc = *r++))
if(c == cc) return 1;
return 0;
}
static int
makelabel(char *name)
{
@ -166,6 +177,8 @@ makelabel(char *name)
return error("Label name is hex number", name);
if(findopcode(name) || scmp(name, "BRK", 4) || !slen(name))
return error("Label name is invalid", name);
if(isrune(name[0]))
return error("Label name is runic", name);
if(p.label_len == 0x400)
return error("Labels limit exceeded", name);
l = &p.labels[p.label_len++];