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pike.c: handle 0 case in repetition

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This commit is contained in:
Kyryl Melekhin
2025-11-01 20:44:03 +00:00
parent 36c27822f5
commit a43ab17911
3 changed files with 57 additions and 3 deletions
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17
pike.c
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@@ -268,7 +268,7 @@ static int compilecode(const char *re_loc, rcode *prog, int sizecode)
}
break;
case '{':;
int maxcnt = 0, mincnt = 0, i = 0, size = PC - term;
int i, maxcnt = 0, mincnt = 0, size = PC - term, nojmp = 0;
re++;
while (isdigit((unsigned char) *re))
mincnt = mincnt * 10 + *re++ - '0';
@@ -279,12 +279,21 @@ static int compilecode(const char *re_loc, rcode *prog, int sizecode)
EMIT(PC+1, REL(PC, PC - size));
PC += 2;
maxcnt = mincnt;
nojmp = 1;
}
while (isdigit((unsigned char) *re))
maxcnt = maxcnt * 10 + *re++ - '0';
} else
maxcnt = mincnt;
for (; i < mincnt-1; i++) {
if (!mincnt && !maxcnt) {
zcase:
INSERT_CODE(term, 2, PC);
EMIT(term, nojmp ? SPLIT : JMP);
EMIT(term + 1, REL(term, PC));
term = PC;
break;
}
for (i = 0; i < mincnt-1; i++) {
if (code)
memcpy(&code[PC], &code[term], size*sizeof(int));
PC += size;
@@ -296,6 +305,10 @@ static int compilecode(const char *re_loc, rcode *prog, int sizecode)
memcpy(&code[PC], &code[term], size*sizeof(int));
PC += size;
}
if (!mincnt && maxcnt) {
nojmp = 1;
goto zcase;
}
break;
case '?':
if (PC == term)