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Don't open-code string value accesses in xpath #15007

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merged 1 commit into from
Jul 18, 2024
Merged

Don't open-code string value accesses in xpath #15007

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20 changes: 10 additions & 10 deletions ext/dom/xpath.c
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Original file line number Diff line number Diff line change
Expand Up @@ -486,22 +486,22 @@ PHP_METHOD(DOMXPath, quote) {
}
if (memchr(input, '\'', input_len) == NULL) {
zend_string *const output = zend_string_safe_alloc(1, input_len, 2, false);
output->val[0] = '\'';
memcpy(output->val + 1, input, input_len);
output->val[input_len + 1] = '\'';
output->val[input_len + 2] = '\0';
ZSTR_VAL(output)[0] = '\'';
memcpy(ZSTR_VAL(output) + 1, input, input_len);
ZSTR_VAL(output)[input_len + 1] = '\'';
ZSTR_VAL(output)[input_len + 2] = '\0';
RETURN_STR(output);
} else if (memchr(input, '"', input_len) == NULL) {
zend_string *const output = zend_string_safe_alloc(1, input_len, 2, false);
output->val[0] = '"';
memcpy(output->val + 1, input, input_len);
output->val[input_len + 1] = '"';
output->val[input_len + 2] = '\0';
ZSTR_VAL(output)[0] = '"';
memcpy(ZSTR_VAL(output) + 1, input, input_len);
ZSTR_VAL(output)[input_len + 1] = '"';
ZSTR_VAL(output)[input_len + 2] = '\0';
RETURN_STR(output);
} else {
smart_str output = {0};
// need to use the concat() trick published by Robert Rossney at https://stackoverflow.com/a/1352556/1067003
smart_str_appendl(&output, "concat(", 7);
smart_str_appendl(&output, ZEND_STRL("concat("));
const char *ptr = input;
const char *const end = input + input_len;
while (ptr < end) {
Expand All @@ -518,7 +518,7 @@ PHP_METHOD(DOMXPath, quote) {
smart_str_appendc(&output, ',');
}
ZEND_ASSERT(ptr == end);
output.s->val[output.s->len - 1] = ')';
ZSTR_VAL(output.s)[output.s->len - 1] = ')';
RETURN_STR(smart_str_extract(&output));
}
}
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