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41996e8d4f
Only functional change is the renaming of the functions `dom_document_substitue_entities_(read|write)` to replace `substitue` with `substitute`.
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Niels Dossche <nielsdos@php.net> |
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+----------------------------------------------------------------------+
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "php.h"
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#if defined(HAVE_LIBXML) && defined(HAVE_DOM)
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#include "infra.h"
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/* https://infra.spec.whatwg.org/#ascii-whitespace */
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const char *ascii_whitespace = "\x09\x0A\x0C\x0D\x20";
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/* https://infra.spec.whatwg.org/#strip-and-collapse-ascii-whitespace */
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zend_string *dom_strip_and_collapse_ascii_whitespace(zend_string *input)
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{
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if (input == zend_empty_string) {
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return input;
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}
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ZEND_ASSERT(!ZSTR_IS_INTERNED(input));
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ZEND_ASSERT(GC_REFCOUNT(input) == 1);
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char *write_ptr = ZSTR_VAL(input);
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const char *start = ZSTR_VAL(input);
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const char *current = start;
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const char *end = current + ZSTR_LEN(input);
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current += strspn(current, ascii_whitespace);
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while (current < end) {
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/* Copy non-whitespace */
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size_t non_whitespace_len = strcspn(current, ascii_whitespace);
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/* If the pointers are equal, we still haven't encountered collapsible or strippable whitespace. */
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if (write_ptr != current) {
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memmove(write_ptr, current, non_whitespace_len);
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}
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current += non_whitespace_len;
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write_ptr += non_whitespace_len;
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/* Skip whitespace */
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current += strspn(current, ascii_whitespace);
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if (current < end) {
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/* Only make a space when we're not yet at the end of the input, because that means more non-whitespace
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* input is to come. */
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*write_ptr++ = ' ';
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}
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}
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*write_ptr = '\0';
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size_t len = write_ptr - start;
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if (len != ZSTR_LEN(input)) {
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return zend_string_truncate(input, len, false);
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} else {
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/* Forget the hash value since we may have transformed non-space-whitespace into spaces. */
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zend_string_forget_hash_val(input);
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return input;
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}
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}
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#endif /* HAVE_LIBXML && HAVE_DOM */
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