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Better labels for lambdas

This commit is contained in:
Devine Lu Linvega 2023-07-29 16:24:39 -07:00
parent 32cc690539
commit 3a8cc42e0e
1 changed files with 13 additions and 8 deletions
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21
src/uxnasm.c
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@ -36,12 +36,12 @@ typedef struct {
typedef struct {
Uint8 data[LENGTH];
Uint8 lambda_stack[0x100], lambda_ptr, lambda_count;
char scope[0x40], lambda[0x10];
unsigned int ptr, length;
Uint16 label_len, macro_len, refs_len;
Label labels[0x400];
Macro macros[0x100];
Reference refs[0x800];
char scope[0x40];
} Program;
Program p;
@ -201,6 +201,15 @@ 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)
{
@ -353,16 +362,12 @@ parse(char *w, FILE *f)
if(!writebyte(c)) return 0;
break;
case '{': /* lambda start */
char laba[8] = "lambda0\0";
p.lambda_stack[p.lambda_ptr++] = p.lambda_count;
laba[6] = '0' + p.lambda_count++;
makereference(p.scope, laba, ' ', p.ptr + 1);
makereference(p.scope, makelambda(p.lambda_count++), ' ', p.ptr + 1);
return writebyte(0x60) && writeshort(0xffff, 0);
case '}': /* lambda end */
char labb[8] = "lambda0\0";
labb[6] = '0' + p.lambda_stack[--p.lambda_ptr];
if(!makelabel(labb))
return error("Invalid label", labb);
if(!makelabel(makelambda(p.lambda_stack[--p.lambda_ptr])))
return error("Invalid label", w);
return writebyte(0x6f);
case '[':
case ']':