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DEFINITIONS
This source file includes following definitions.
- ZEND_EXTERN_MODULE_GLOBALS
- grapheme_substr_ascii
- grapheme_strpos_utf16
- grapheme_ascii_check
- grapheme_split_string
- grapheme_count_graphemes
- grapheme_get_haystack_offset
- grapheme_strrpos_ascii
- grapheme_get_break_iterator
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Ed Batutis <ed@batutis.com> |
+----------------------------------------------------------------------+
*/
/* {{{ includes */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <php.h>
#include "grapheme.h"
#include "grapheme_util.h"
#include "intl_common.h"
#include <unicode/utypes.h>
#include <unicode/ucol.h>
#include <unicode/ustring.h>
#include <unicode/ubrk.h>
#include <unicode/usearch.h>
#include "ext/standard/php_string.h"
ZEND_EXTERN_MODULE_GLOBALS( intl )
/* }}} */
/* {{{ grapheme_close_global_iterator - clean up */
void
grapheme_close_global_iterator( TSRMLS_D )
{
UBreakIterator *global_break_iterator = INTL_G( grapheme_iterator );
if ( NULL != global_break_iterator ) {
ubrk_close(global_break_iterator);
}
}
/* }}} */
/* {{{ grapheme_substr_ascii f='from' - starting point, l='length' */
void grapheme_substr_ascii(char *str, int str_len, int f, int l, int argc, char **sub_str, int *sub_str_len)
{
*sub_str = NULL;
if (argc > 2) {
if ((l < 0 && -l > str_len)) {
return;
} else if (l > str_len) {
l = str_len;
}
} else {
l = str_len;
}
if (f > str_len || (f < 0 && -f > str_len)) {
return;
}
if (l < 0 && (l + str_len - f) < 0) {
return;
}
/* if "from" position is negative, count start position from the end
* of the string
*/
if (f < 0) {
f = str_len + f;
if (f < 0) {
f = 0;
}
}
/* if "length" position is negative, set it to the length
* needed to stop that many chars from the end of the string
*/
if (l < 0) {
l = (str_len - f) + l;
if (l < 0) {
l = 0;
}
}
if (f >= str_len) {
return;
}
if ((f + l) > str_len) {
l = str_len - f;
}
*sub_str = str + f;
*sub_str_len = l;
return;
}
/* }}} */
#define STRPOS_CHECK_STATUS(status, error) \
if ( U_FAILURE( (status) ) ) { \
intl_error_set_code( NULL, (status) TSRMLS_CC ); \
intl_error_set_custom_msg( NULL, (error), 0 TSRMLS_CC ); \
if (uhaystack) { \
efree( uhaystack ); \
} \
if (uneedle) { \
efree( uneedle ); \
} \
if(bi) { \
ubrk_close (bi); \
} \
if(src) { \
usearch_close(src); \
} \
return -1; \
}
/* {{{ grapheme_strpos_utf16 - strrpos using utf16*/
int 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, int last TSRMLS_DC)
{
UChar *uhaystack = NULL, *uneedle = NULL;
int32_t uhaystack_len = 0, uneedle_len = 0, char_pos, ret_pos, offset_pos = 0;
unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
UBreakIterator* bi = NULL;
UErrorCode status;
UStringSearch* src = NULL;
UCollator *coll;
if(puchar_pos) {
*puchar_pos = -1;
}
/* convert the strings to UTF-16. */
status = U_ZERO_ERROR;
intl_convert_utf8_to_utf16(&uhaystack, &uhaystack_len, (char *) haystack, haystack_len, &status );
STRPOS_CHECK_STATUS(status, "Error converting input string to UTF-16");
status = U_ZERO_ERROR;
intl_convert_utf8_to_utf16(&uneedle, &uneedle_len, (char *) needle, needle_len, &status );
STRPOS_CHECK_STATUS(status, "Error converting input string to UTF-16");
/* get a pointer to the haystack taking into account the offset */
status = U_ZERO_ERROR;
bi = grapheme_get_break_iterator(u_break_iterator_buffer, &status TSRMLS_CC );
STRPOS_CHECK_STATUS(status, "Failed to get iterator");
status = U_ZERO_ERROR;
ubrk_setText(bi, uhaystack, uhaystack_len, &status);
STRPOS_CHECK_STATUS(status, "Failed to set up iterator");
status = U_ZERO_ERROR;
src = usearch_open(uneedle, uneedle_len, uhaystack, uhaystack_len, "", bi, &status);
STRPOS_CHECK_STATUS(status, "Error creating search object");
if(f_ignore_case) {
coll = usearch_getCollator(src);
status = U_ZERO_ERROR;
ucol_setAttribute(coll, UCOL_STRENGTH, UCOL_SECONDARY, &status);
STRPOS_CHECK_STATUS(status, "Error setting collation strength");
usearch_reset(src);
}
if(offset != 0) {
offset_pos = grapheme_get_haystack_offset(bi, offset);
if(offset_pos == -1) {
status = U_ILLEGAL_ARGUMENT_ERROR;
STRPOS_CHECK_STATUS(status, "Invalid search offset");
}
status = U_ZERO_ERROR;
usearch_setOffset(src, offset_pos, &status);
STRPOS_CHECK_STATUS(status, "Invalid search offset");
}
if(last) {
char_pos = usearch_last(src, &status);
if(char_pos < offset_pos) {
/* last one is beyound our start offset */
char_pos = USEARCH_DONE;
}
} else {
char_pos = usearch_next(src, &status);
}
STRPOS_CHECK_STATUS(status, "Error looking up string");
if(char_pos != USEARCH_DONE && ubrk_isBoundary(bi, char_pos)) {
ret_pos = grapheme_count_graphemes(bi, uhaystack,char_pos);
if(puchar_pos) {
*puchar_pos = char_pos;
}
} else {
ret_pos = -1;
}
if (uhaystack) {
efree( uhaystack );
}
if (uneedle) {
efree( uneedle );
}
ubrk_close (bi);
usearch_close (src);
return ret_pos;
}
/* }}} */
/* {{{ grapheme_ascii_check: ASCII check */
int grapheme_ascii_check(const unsigned char *day, int32_t len)
{
int ret_len = len;
while ( len-- ) {
if ( *day++ > 0x7f )
return -1;
}
return ret_len;
}
/* }}} */
/* {{{ grapheme_split_string: find and optionally return grapheme boundaries */
int grapheme_split_string(const UChar *text, int32_t text_length, int boundary_array[], int boundary_array_len TSRMLS_DC )
{
unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
UErrorCode status = U_ZERO_ERROR;
int ret_len, pos;
UBreakIterator* bi;
bi = grapheme_get_break_iterator((void*)u_break_iterator_buffer, &status TSRMLS_CC );
if( U_FAILURE(status) ) {
return -1;
}
ubrk_setText(bi, text, text_length, &status);
pos = 0;
for ( ret_len = 0; pos != UBRK_DONE; ) {
pos = ubrk_next(bi);
if ( pos != UBRK_DONE ) {
if ( NULL != boundary_array && ret_len < boundary_array_len ) {
boundary_array[ret_len] = pos;
}
ret_len++;
}
}
ubrk_close(bi);
return ret_len;
}
/* }}} */
/* {{{ grapheme_count_graphemes */
int32_t grapheme_count_graphemes(UBreakIterator *bi, UChar *string, int32_t string_len)
{
int ret_len = 0;
int pos = 0;
UErrorCode status = U_ZERO_ERROR;
ubrk_setText(bi, string, string_len, &status);
do {
pos = ubrk_next(bi);
if ( UBRK_DONE != pos ) {
ret_len++;
}
} while ( UBRK_DONE != pos );
return ret_len;
}
/* }}} */
/* {{{ grapheme_get_haystack_offset - bump the haystack pointer based on the grapheme count offset */
int grapheme_get_haystack_offset(UBreakIterator* bi, int32_t offset)
{
int32_t pos;
int32_t (*iter_op)(UBreakIterator* bi);
int iter_incr;
if ( 0 == offset ) {
return 0;
}
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 -1;
}
return 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
*/