mirror of
https://github.com/php/php-src.git
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620 lines
15 KiB
C
620 lines
15 KiB
C
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/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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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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| http://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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| Author: Ed Batutis <ed@batutis.com> |
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+----------------------------------------------------------------------+
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*/
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/* {{{ includes */
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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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#include "grapheme.h"
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#include "grapheme_util.h"
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#include "intl_common.h"
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#include <unicode/utypes.h>
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#include <unicode/ucol.h>
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#include <unicode/ustring.h>
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#include <unicode/ubrk.h>
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#include "ext/standard/php_string.h"
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ZEND_EXTERN_MODULE_GLOBALS( intl )
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/* }}} */
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/* {{{ grapheme_close_global_iterator - clean up */
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void
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grapheme_close_global_iterator( TSRMLS_D )
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{
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UBreakIterator *global_break_iterator = INTL_G( grapheme_iterator );
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if ( NULL != global_break_iterator ) {
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ubrk_close(global_break_iterator);
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}
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}
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/* }}} */
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/* {{{ grapheme_intl_case_fold: convert string to lowercase */
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void
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grapheme_intl_case_fold(UChar** ptr_to_free, UChar **str, int32_t *str_len, UErrorCode *pstatus )
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{
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UChar *dest;
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int32_t dest_len, size_required;
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/* allocate a destination string that is a bit larger than the src, hoping that is enough */
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dest_len = (*str_len) + ( *str_len / 10 );
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dest = (UChar*) eumalloc(dest_len);
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*pstatus = U_ZERO_ERROR;
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size_required = u_strFoldCase(dest, dest_len, *str, *str_len, U_FOLD_CASE_DEFAULT, pstatus);
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dest_len = size_required;
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if ( U_BUFFER_OVERFLOW_ERROR == *pstatus ) {
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dest = (UChar*) eurealloc(dest, dest_len);
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*pstatus = U_ZERO_ERROR;
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size_required = u_strFoldCase(dest, dest_len, *str, *str_len, U_FOLD_CASE_DEFAULT, pstatus);
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}
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if ( U_FAILURE(*pstatus) ) {
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return;
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}
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if ( NULL != ptr_to_free) {
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efree(*ptr_to_free);
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*ptr_to_free = dest;
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}
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*str = dest;
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*str_len = dest_len;
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return;
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}
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/* }}} */
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/* {{{ grapheme_substr_ascii f='from' - starting point, l='length' */
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void
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grapheme_substr_ascii(char *str, int str_len, int f, int l, int argc, char **sub_str, int *sub_str_len)
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{
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*sub_str = NULL;
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if (argc > 2) {
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if ((l < 0 && -l > str_len)) {
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return;
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} else if (l > str_len) {
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l = str_len;
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}
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} else {
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l = str_len;
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}
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if (f > str_len || (f < 0 && -f > str_len)) {
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return;
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}
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if (l < 0 && (l + str_len - f) < 0) {
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return;
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}
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/* if "from" position is negative, count start position from the end
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* of the string
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*/
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if (f < 0) {
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f = str_len + f;
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if (f < 0) {
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f = 0;
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}
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}
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/* if "length" position is negative, set it to the length
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* needed to stop that many chars from the end of the string
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*/
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if (l < 0) {
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l = (str_len - f) + l;
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if (l < 0) {
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l = 0;
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}
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}
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if (f >= str_len) {
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return;
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}
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if ((f + l) > str_len) {
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l = str_len - f;
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}
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*sub_str = str + f;
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*sub_str_len = l;
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return;
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}
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/* }}} */
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/* {{{ grapheme_strrpos_utf16 - strrpos using utf16 */
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int
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grapheme_strrpos_utf16(unsigned char *haystack, int32_t haystack_len, unsigned char*needle, int32_t needle_len, int32_t offset, int f_ignore_case TSRMLS_DC)
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{
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UChar *uhaystack, *puhaystack, *uhaystack_end, *uneedle;
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int32_t uhaystack_len, uneedle_len;
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UErrorCode status;
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unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
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UBreakIterator* bi = NULL;
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int ret_pos, pos;
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/* convert the strings to UTF-16. */
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uhaystack = NULL;
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uhaystack_len = 0;
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status = U_ZERO_ERROR;
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intl_convert_utf8_to_utf16(&uhaystack, &uhaystack_len, (char *) haystack, haystack_len, &status );
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if ( U_FAILURE( status ) ) {
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/* Set global error code. */
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intl_error_set_code( NULL, status TSRMLS_CC );
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/* Set error messages. */
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intl_error_set_custom_msg( NULL, "Error converting input string to UTF-16", 1 TSRMLS_CC );
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efree( uhaystack );
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return -1;
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}
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if ( f_ignore_case ) {
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grapheme_intl_case_fold(&uhaystack, &uhaystack, &uhaystack_len, &status );
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}
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/* get a pointer to the haystack taking into account the offset */
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bi = NULL;
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status = U_ZERO_ERROR;
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bi = grapheme_get_break_iterator(u_break_iterator_buffer, &status TSRMLS_CC );
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puhaystack = grapheme_get_haystack_offset(bi, uhaystack, uhaystack_len, offset);
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if ( NULL == puhaystack ) {
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intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Offset not contained in string", 1 TSRMLS_CC );
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efree( uhaystack );
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ubrk_close (bi);
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return -1;
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}
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uneedle = NULL;
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uneedle_len = 0;
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status = U_ZERO_ERROR;
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intl_convert_utf8_to_utf16(&uneedle, &uneedle_len, (char *) needle, needle_len, &status );
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if ( U_FAILURE( status ) ) {
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/* Set global error code. */
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intl_error_set_code( NULL, status TSRMLS_CC );
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/* Set error messages. */
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intl_error_set_custom_msg( NULL, "Error converting input string to UTF-16", 1 TSRMLS_CC );
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efree( uhaystack );
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efree( uneedle );
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ubrk_close (bi);
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return -1;
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}
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if ( f_ignore_case ) {
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grapheme_intl_case_fold(&uneedle, &uneedle, &uneedle_len, &status );
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}
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ret_pos = -1; /* -1 represents 'not found' */
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/* back up until there's needle_len characters to compare */
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uhaystack_end = uhaystack + uhaystack_len;
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pos = ubrk_last(bi);
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puhaystack = uhaystack + pos;
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while ( uhaystack_end - puhaystack < uneedle_len ) {
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pos = ubrk_previous(bi);
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if ( UBRK_DONE == pos ) {
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break;
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}
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puhaystack = uhaystack + pos;
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}
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/* is there enough haystack left to hold the needle? */
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if ( ( uhaystack_end - puhaystack ) < uneedle_len ) {
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/* not enough, not found */
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goto exit;
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}
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while ( UBRK_DONE != pos ) {
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if (!u_memcmp(uneedle, puhaystack, uneedle_len)) { /* needle_len - 1 in zend memnstr? */
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/* does the grapheme in the haystack end at the same place as the last grapheme in the needle? */
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if ( ubrk_isBoundary(bi, pos + uneedle_len) ) {
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/* found it, get grapheme count offset */
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ret_pos = grapheme_count_graphemes(bi, uhaystack, pos);
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break;
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}
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/* set position back */
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ubrk_isBoundary(bi, pos);
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}
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pos = ubrk_previous(bi);
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puhaystack = uhaystack + pos;
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}
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exit:
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efree( uhaystack );
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efree( uneedle );
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ubrk_close (bi);
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return ret_pos;
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}
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/* }}} */
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/* {{{ grapheme_strpos_utf16 - strrpos using utf16*/
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int
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grapheme_strpos_utf16(unsigned char *haystack, int32_t haystack_len, unsigned char*needle, int32_t needle_len, int32_t offset, int32_t *puchar_pos, int f_ignore_case TSRMLS_DC)
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{
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UChar *uhaystack, *puhaystack, *uneedle;
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int32_t uhaystack_len, uneedle_len;
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int ret_pos;
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unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
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UBreakIterator* bi;
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UErrorCode status;
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*puchar_pos = -1;
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/* convert the strings to UTF-16. */
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uhaystack = NULL;
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uhaystack_len = 0;
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status = U_ZERO_ERROR;
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intl_convert_utf8_to_utf16(&uhaystack, &uhaystack_len, (char *) haystack, haystack_len, &status );
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if ( U_FAILURE( status ) ) {
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/* Set global error code. */
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intl_error_set_code( NULL, status TSRMLS_CC );
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/* Set error messages. */
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intl_error_set_custom_msg( NULL, "Error converting input string to UTF-16", 1 TSRMLS_CC );
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efree( uhaystack );
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return -1;
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}
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/* get a pointer to the haystack taking into account the offset */
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bi = NULL;
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status = U_ZERO_ERROR;
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bi = grapheme_get_break_iterator(u_break_iterator_buffer, &status TSRMLS_CC );
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puhaystack = grapheme_get_haystack_offset(bi, uhaystack, uhaystack_len, offset);
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uhaystack_len = (uhaystack_len - ( puhaystack - uhaystack));
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if ( NULL == puhaystack ) {
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intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Offset not contained in string", 1 TSRMLS_CC );
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efree( uhaystack );
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ubrk_close (bi);
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return -1;
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}
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if ( f_ignore_case ) {
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grapheme_intl_case_fold(&uhaystack, &puhaystack, &uhaystack_len, &status );
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}
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uneedle = NULL;
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uneedle_len = 0;
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status = U_ZERO_ERROR;
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intl_convert_utf8_to_utf16(&uneedle, &uneedle_len, (char *) needle, needle_len, &status );
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if ( U_FAILURE( status ) ) {
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/* Set global error code. */
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intl_error_set_code( NULL, status TSRMLS_CC );
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/* Set error messages. */
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intl_error_set_custom_msg( NULL, "Error converting input string to UTF-16", 1 TSRMLS_CC );
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efree( uhaystack );
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efree( uneedle );
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ubrk_close (bi);
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return -1;
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}
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if ( f_ignore_case ) {
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grapheme_intl_case_fold(&uneedle, &uneedle, &uneedle_len, &status );
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}
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ret_pos = grapheme_memnstr_grapheme(bi, puhaystack, uneedle, uneedle_len, puhaystack + uhaystack_len );
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*puchar_pos = ubrk_current(bi);
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efree( uhaystack );
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efree( uneedle );
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ubrk_close (bi);
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return ret_pos;
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}
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/* }}} */
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/* {{{ grapheme_ascii_check: ASCII check */
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int grapheme_ascii_check(const unsigned char *day, int32_t len)
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{
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int ret_len = len;
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while ( len-- ) {
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if ( *day++ > 0x7f )
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return -1;
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}
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return ret_len;
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}
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/* }}} */
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/* {{{ grapheme_split_string: find and optionally return grapheme boundaries */
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int grapheme_split_string(const UChar *text, int32_t text_length, int boundary_array[], int boundary_array_len TSRMLS_DC )
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{
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unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
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UErrorCode status = U_ZERO_ERROR;
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int ret_len, pos;
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UBreakIterator* bi;
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bi = grapheme_get_break_iterator((void*)u_break_iterator_buffer, &status TSRMLS_CC );
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if( U_FAILURE(status) ) {
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return -1;
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}
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ubrk_setText(bi, text, text_length, &status);
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pos = 0;
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for ( ret_len = 0; pos != UBRK_DONE; ) {
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pos = ubrk_next(bi);
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if ( pos != UBRK_DONE ) {
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if ( NULL != boundary_array && ret_len < boundary_array_len ) {
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boundary_array[ret_len] = pos;
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}
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ret_len++;
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}
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}
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ubrk_close(bi);
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return ret_len;
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}
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/* }}} */
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/* {{{ grapheme_count_graphemes */
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inline int32_t
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grapheme_count_graphemes(UBreakIterator *bi, UChar *string, int32_t string_len)
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{
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int ret_len = 0;
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int pos = 0;
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UErrorCode status = U_ZERO_ERROR;
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ubrk_setText(bi, string, string_len, &status);
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do {
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pos = ubrk_next(bi);
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if ( UBRK_DONE != pos ) {
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ret_len++;
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}
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} while ( UBRK_DONE != pos );
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return ret_len;
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}
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/* }}} */
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/* {{{ grapheme_memnstr_grapheme: find needle in haystack using grapheme boundaries */
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inline int32_t
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||
|
grapheme_memnstr_grapheme(UBreakIterator *bi, UChar *haystack, UChar *needle, int32_t needle_len, UChar *end)
|
||
|
{
|
||
|
UChar *p = haystack;
|
||
|
UChar ne = needle[needle_len-1];
|
||
|
UErrorCode status;
|
||
|
int32_t grapheme_offset;
|
||
|
|
||
|
end -= needle_len;
|
||
|
|
||
|
while (p <= end) {
|
||
|
|
||
|
if ((p = u_memchr(p, *needle, (end-p+1))) && ne == p[needle_len-1]) {
|
||
|
|
||
|
if (!u_memcmp(needle, p, needle_len - 1)) { /* needle_len - 1 works because if needle_len is 1, we've already tested the char */
|
||
|
|
||
|
/* does the grapheme end here? */
|
||
|
|
||
|
status = U_ZERO_ERROR;
|
||
|
ubrk_setText (bi, haystack, (end - haystack) + needle_len, &status);
|
||
|
|
||
|
if ( ubrk_isBoundary (bi, (p - haystack) + needle_len) ) {
|
||
|
|
||
|
/* found it, get grapheme count offset */
|
||
|
grapheme_offset = grapheme_count_graphemes(bi, haystack, (p - haystack));
|
||
|
|
||
|
return grapheme_offset;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (p == NULL) {
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
p++;
|
||
|
}
|
||
|
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
/* }}} */
|
||
|
|
||
|
/* {{{ grapheme_memrstr_grapheme: reverse find needle in haystack using grapheme boundaries */
|
||
|
inline void *grapheme_memrchr_grapheme(const void *s, int c, int32_t n)
|
||
|
{
|
||
|
register unsigned char *e;
|
||
|
|
||
|
if (n <= 0) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
for (e = (unsigned char *)s + n - 1; e >= (unsigned char *)s; e--) {
|
||
|
if (*e == (unsigned char)c) {
|
||
|
return (void *)e;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return NULL;
|
||
|
}
|
||
|
/* }}} */
|
||
|
|
||
|
/* {{{ grapheme_get_haystack_offset - bump the haystack pointer based on the grapheme count offset */
|
||
|
UChar *
|
||
|
grapheme_get_haystack_offset(UBreakIterator* bi, UChar *uhaystack, int32_t uhaystack_len, int32_t offset)
|
||
|
{
|
||
|
UErrorCode status;
|
||
|
int32_t pos;
|
||
|
int32_t (*iter_op)(UBreakIterator* bi);
|
||
|
int iter_incr;
|
||
|
|
||
|
if ( NULL != bi ) {
|
||
|
status = U_ZERO_ERROR;
|
||
|
ubrk_setText (bi, uhaystack, uhaystack_len, &status);
|
||
|
}
|
||
|
|
||
|
if ( 0 == offset ) {
|
||
|
return uhaystack;
|
||
|
}
|
||
|
|
||
|
if ( offset < 0 ) {
|
||
|
iter_op = ubrk_previous;
|
||
|
ubrk_last(bi); /* one past the end */
|
||
|
iter_incr = 1;
|
||
|
}
|
||
|
else {
|
||
|
iter_op = ubrk_next;
|
||
|
iter_incr = -1;
|
||
|
}
|
||
|
|
||
|
pos = 0;
|
||
|
|
||
|
while ( pos != UBRK_DONE && offset != 0 ) {
|
||
|
|
||
|
pos = iter_op(bi);
|
||
|
|
||
|
if ( UBRK_DONE != pos ) {
|
||
|
offset += iter_incr;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if ( offset != 0 ) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
return uhaystack + pos;
|
||
|
}
|
||
|
/* }}} */
|
||
|
|
||
|
/* {{{ grapheme_strrpos_ascii: borrowed from the php ext/standard/string.c */
|
||
|
int32_t
|
||
|
grapheme_strrpos_ascii(unsigned char *haystack, int32_t haystack_len, unsigned char *needle, int32_t needle_len, int32_t offset)
|
||
|
{
|
||
|
unsigned char *p, *e;
|
||
|
|
||
|
if (offset >= 0) {
|
||
|
p = haystack + offset;
|
||
|
e = haystack + haystack_len - needle_len;
|
||
|
} else {
|
||
|
p = haystack;
|
||
|
if (needle_len > -offset) {
|
||
|
e = haystack + haystack_len - needle_len;
|
||
|
} else {
|
||
|
e = haystack + haystack_len + offset;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (needle_len == 1) {
|
||
|
/* Single character search can shortcut memcmps */
|
||
|
while (e >= p) {
|
||
|
if (*e == *needle) {
|
||
|
return (e - p + (offset > 0 ? offset : 0));
|
||
|
}
|
||
|
e--;
|
||
|
}
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
while (e >= p) {
|
||
|
if (memcmp(e, needle, needle_len) == 0) {
|
||
|
return (e - p + (offset > 0 ? offset : 0));
|
||
|
}
|
||
|
e--;
|
||
|
}
|
||
|
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
/* }}} */
|
||
|
|
||
|
/* {{{ grapheme_get_break_iterator: get a clone of the global character break iterator */
|
||
|
UBreakIterator*
|
||
|
grapheme_get_break_iterator(void *stack_buffer, UErrorCode *status TSRMLS_DC )
|
||
|
{
|
||
|
int32_t buffer_size;
|
||
|
|
||
|
UBreakIterator *global_break_iterator = INTL_G( grapheme_iterator );
|
||
|
|
||
|
if ( NULL == global_break_iterator ) {
|
||
|
|
||
|
global_break_iterator = ubrk_open(UBRK_CHARACTER,
|
||
|
NULL, /* icu default locale - locale has no effect on this iterator */
|
||
|
NULL, /* text not set in global iterator */
|
||
|
0, /* text length = 0 */
|
||
|
status);
|
||
|
|
||
|
INTL_G(grapheme_iterator) = global_break_iterator;
|
||
|
}
|
||
|
|
||
|
buffer_size = U_BRK_SAFECLONE_BUFFERSIZE;
|
||
|
|
||
|
return ubrk_safeClone(global_break_iterator, stack_buffer, &buffer_size, status);
|
||
|
}
|
||
|
/* }}} */
|
||
|
|
||
|
/*
|
||
|
* Local variables:
|
||
|
* tab-width: 4
|
||
|
* c-basic-offset: 4
|
||
|
* End:
|
||
|
* vim600: fdm=marker
|
||
|
* vim: noet sw=4 ts=4
|
||
|
*/
|
||
|
|