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(uxnasm) Generalized lambdas as common labels

This commit is contained in:
neauoire 2023-08-02 19:48:48 -07:00
parent 9ca8e9623d
commit 2ddc20b1b6
1 changed files with 14 additions and 15 deletions
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29
src/uxnasm.c
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@ -175,6 +175,15 @@ makelabel(char *name)
return 1;
}
static char *
makelambda(int id)
{
scpy("lambda", p.lambda, 0x07);
p.lambda[6] = '0' + (id >> 0x4);
p.lambda[7] = '0' + (id & 0xf);
return p.lambda;
}
static int
makereference(char *scope, char *label, char rune, Uint16 addr)
{
@ -183,7 +192,10 @@ makereference(char *scope, char *label, char rune, Uint16 addr)
if(p.refs_len >= 0x800)
return error("References limit exceeded", label);
r = &p.refs[p.refs_len++];
if(label[0] == '&') {
if(label[0] == '{') {
p.lambda_stack[p.lambda_ptr++] = p.lambda_count;
scpy(makelambda(p.lambda_count++), r->name, 0x40);
} else if(label[0] == '&') {
if(!sublabel(subw, scope, label + 1))
return error("Invalid sublabel", label);
scpy(subw, r->name, 0x40);
@ -201,15 +213,6 @@ makereference(char *scope, char *label, char rune, Uint16 addr)
return 1;
}
static char *
makelambda(int id)
{
scpy("lambda", p.lambda, 0x07);
p.lambda[6] = '0' + (id >> 0x4);
p.lambda[7] = '0' + (id & 0xf);
return p.lambda;
}
static int
writebyte(Uint8 b)
{
@ -361,14 +364,10 @@ parse(char *w, FILE *f)
while((c = w[++i]))
if(!writebyte(c)) return 0;
break;
case '{': /* lambda start */
p.lambda_stack[p.lambda_ptr++] = p.lambda_count;
makereference(p.scope, makelambda(p.lambda_count++), ' ', p.ptr + 1);
return writebyte(0x60) && writeshort(0xffff, 0);
case '}': /* lambda end */
if(!makelabel(makelambda(p.lambda_stack[--p.lambda_ptr])))
return error("Invalid label", w);
return writebyte(0x6f);
break;
case '[':
case ']':
if(slen(w) == 1) break; /* else fallthrough */