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fix: only update the buffer if realloc succeeded #76

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fix: only update the buffer if realloc succeeded #76

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11 changes: 8 additions & 3 deletions src/buffer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -52,9 +52,14 @@ void cmark_strbuf_grow(cmark_strbuf *buf, bufsize_t target_size) {
bufsize_t new_size = target_size + target_size / 2;
new_size += 1;
new_size = (new_size + 7) & ~7;

buf->ptr = (unsigned char *)buf->mem->realloc(buf->asize ? buf->ptr : NULL,
new_size);

unsigned char *new_ptr = (unsigned char *)buf->mem->realloc(buf->asize ? buf->ptr : NULL, new_size);

if (new_ptr != NULL) {
// Only update the buffer if realloc succeeded
buf->ptr = new_ptr;
}

buf->asize = new_size;
}

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