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zlib: use zend_string_{extend,truncate} over *_realloc (#18462)

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These cases seemed obvious enough to me to confidently change as an
outsider to zlib.
This commit is contained in:
Levi Morrison
2025-04-30 08:18:04 -06:00
committed by GitHub
parent 39a56a1687
commit 6406d5f792
1 changed files with 4 additions and 4 deletions
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8
ext/zlib/zlib.c
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@@ -991,7 +991,7 @@ PHP_FUNCTION(inflate_add)
case Z_OK:
if (ctx->Z.avail_out == 0) {
/* more output buffer space needed; realloc and try again */
out = zend_string_realloc(out, ZSTR_LEN(out) + CHUNK_SIZE, 0);
out = zend_string_extend(out, ZSTR_LEN(out) + CHUNK_SIZE, 0);
ctx->Z.avail_out = CHUNK_SIZE;
ctx->Z.next_out = (Bytef *) ZSTR_VAL(out) + buffer_used;
break;
@@ -1003,7 +1003,7 @@ PHP_FUNCTION(inflate_add)
case Z_BUF_ERROR:
if (flush_type == Z_FINISH && ctx->Z.avail_out == 0) {
/* more output buffer space needed; realloc and try again */
out = zend_string_realloc(out, ZSTR_LEN(out) + CHUNK_SIZE, 0);
out = zend_string_extend(out, ZSTR_LEN(out) + CHUNK_SIZE, 0);
ctx->Z.avail_out = CHUNK_SIZE;
ctx->Z.next_out = (Bytef *) ZSTR_VAL(out) + buffer_used;
break;
@@ -1039,7 +1039,7 @@ PHP_FUNCTION(inflate_add)
} while (1);
complete:
out = zend_string_realloc(out, buffer_used, 0);
out = zend_string_truncate(out, buffer_used, 0);
ZSTR_VAL(out)[buffer_used] = 0;
RETURN_STR(out);
}
@@ -1228,7 +1228,7 @@ PHP_FUNCTION(deflate_add)
if (ctx->Z.avail_out == 0) {
/* more output buffer space needed; realloc and try again */
/* adding 64 more bytes solved every issue I have seen */
out = zend_string_realloc(out, ZSTR_LEN(out) + 64, 0);
out = zend_string_extend(out, ZSTR_LEN(out) + 64, 0);
ctx->Z.avail_out = 64;
ctx->Z.next_out = (Bytef *) ZSTR_VAL(out) + buffer_used;
}