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Removed extra check from apply_rule

This commit is contained in:
Devine Lu Linvega 2024-04-25 09:48:24 -07:00
parent 97f8cf03ac
commit d8325fabcc
1 changed files with 19 additions and 23 deletions
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42
src/modal.c
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@ -103,10 +103,10 @@ write_rule(Rule *r, char *s, int create)
}
static int
apply_rule(Rule *r, char *s)
apply_rule(Rule *r, char **regs, char *s)
{
unsigned int i, id;
char c, *a = r->a, *regs[0x08], *reg;
char c, *a = r->a, *b = r->b, *origin = dst_, *reg;
/* phase: clean registers */
for(i = 0; i < r->ptr; i++)
regs[i] = NULL;
@ -129,25 +129,21 @@ apply_rule(Rule *r, char *s)
if(c != *s++) return 0;
}
/* phase: write rule */
if(!(c = *s) || spacer(c)) {
char *b = r->b, *origin = dst_;
while((c = *b++)) {
if(c == '?') {
id = *b - '0';
if(id < 9 && (reg = regs[id]))
b++, write_reg(r->reg[id], reg);
else
*dst_++ = c;
} else
while((c = *b++)) {
if(c == '?') {
id = *b - '0';
if(id < 9 && (reg = regs[id]))
b++, write_reg(r->reg[id], reg);
else
*dst_++ = c;
}
if(dst_ == origin) {
while(*s == ' ') s++;
if(*s == ')' && *(dst_ - 1) == ' ') dst_--;
}
return write_rule(r, s, 0);
} else
*dst_++ = c;
}
return 0;
if(dst_ == origin) {
while(*s == ' ') s++;
if(*s == ')' && *(dst_ - 1) == ' ') dst_--;
}
return write_rule(r, s, 0);
}
static int
@ -199,7 +195,7 @@ compile_rule(Rule *r, int id, char *src)
static int
rewrite(void)
{
char c, last = 0, *cap, *s = src_;
char c, last = 0, *cap, *s = src_, *regs[0x08];
while(*s == ' ') s++;
while((c = *s)) {
if(spacer(last)) {
@ -217,11 +213,11 @@ rewrite(void)
compile_rule(&lambda, -1, s + 2);
s = cap;
while(*s == ' ') s++;
return apply_rule(&lambda, s);
return apply_rule(&lambda, regs, s);
}
/* phase: match */
for(r = rules; r < rules_; r++)
if(apply_rule(r, s)) return 1;
if(apply_rule(r, regs, s)) return 1;
}
*dst_++ = last = c;
s++;
@ -240,7 +236,7 @@ main(int argc, char **argv)
return !printf("usage: modal [-vqn] source.modal\n");
for(i = 1; i < argc && *argv[i] == '-'; i++) {
switch(argv[i][1]) {
case 'v': /* version */ return !printf("Modal Interpreter, 24 Apr 2024.\n");
case 'v': /* version */ return !printf("Modal Interpreter, 25 Apr 2024.\n");
case 'q': /* quiet */ quiet = 1; break;
case 'n': /* infinite */ cycles = 0xffffffff; break;
}