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Consider Strgrow overflow in Strinsert_char

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Tatsuya Kinoshita
2021-03-04 22:18:03 +09:00
parent 1995178e67
commit e11bb2b868
1 changed files with 3 additions and 1 deletions
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4
Str.c
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@@ -348,10 +348,12 @@ Strinsert_char(Str s, int pos, char c)
{ {
int i; int i;
STR_LENGTH_CHECK(s); STR_LENGTH_CHECK(s);
if (pos < 0 || s->length < pos) if (pos < 0)
return; return;
if (s->length + 2 > s->area_size) if (s->length + 2 > s->area_size)
Strgrow(s); Strgrow(s);
if (s->length < pos)
return;
for (i = s->length; i > pos; i--) for (i = s->length; i > pos; i--)
s->ptr[i] = s->ptr[i - 1]; s->ptr[i] = s->ptr[i - 1];
s->ptr[++s->length] = '\0'; s->ptr[++s->length] = '\0';