mirror of
https://github.com/php/php-src.git
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314 lines
7.8 KiB
C
314 lines
7.8 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2005 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.0 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_0.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: Wez Furlong (wez@thebrainroom.com) |
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+----------------------------------------------------------------------+
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Based on code from ucdata-2.5, which has the following Copyright:
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Copyright 2001 Computing Research Labs, New Mexico State University
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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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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#include "php_ini.h"
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#if HAVE_MBSTRING
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/* include case folding data generated from the official UnicodeData.txt file */
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#include "mbstring.h"
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#include "php_unicode.h"
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#include "unicode_data.h"
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/*
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* A simple array of 32-bit masks for lookup.
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*/
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static unsigned long masks32[32] = {
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0x00000001, 0x00000002, 0x00000004, 0x00000008, 0x00000010, 0x00000020,
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0x00000040, 0x00000080, 0x00000100, 0x00000200, 0x00000400, 0x00000800,
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0x00001000, 0x00002000, 0x00004000, 0x00008000, 0x00010000, 0x00020000,
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0x00040000, 0x00080000, 0x00100000, 0x00200000, 0x00400000, 0x00800000,
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0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, 0x20000000,
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0x40000000, 0x80000000
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};
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static int prop_lookup(unsigned long code, unsigned long n)
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{
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long l, r, m;
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/*
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* There is an extra node on the end of the offsets to allow this routine
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* to work right. If the index is 0xffff, then there are no nodes for the
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* property.
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*/
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if ((l = _ucprop_offsets[n]) == 0xffff)
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return 0;
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/*
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* Locate the next offset that is not 0xffff. The sentinel at the end of
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* the array is the max index value.
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*/
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for (m = 1; n + m < _ucprop_size && _ucprop_offsets[n + m] == 0xffff; m++)
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;
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r = _ucprop_offsets[n + m] - 1;
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while (l <= r) {
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/*
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* Determine a "mid" point and adjust to make sure the mid point is at
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* the beginning of a range pair.
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*/
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m = (l + r) >> 1;
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m -= (m & 1);
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if (code > _ucprop_ranges[m + 1])
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l = m + 2;
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else if (code < _ucprop_ranges[m])
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r = m - 2;
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else if (code >= _ucprop_ranges[m] && code <= _ucprop_ranges[m + 1])
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return 1;
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}
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return 0;
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}
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MBSTRING_API int php_unicode_is_prop(unsigned long code, unsigned long mask1,
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unsigned long mask2)
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{
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unsigned long i;
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if (mask1 == 0 && mask2 == 0)
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return 0;
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for (i = 0; mask1 && i < 32; i++) {
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if ((mask1 & masks32[i]) && prop_lookup(code, i))
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return 1;
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}
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for (i = 32; mask2 && i < _ucprop_size; i++) {
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if ((mask2 & masks32[i & 31]) && prop_lookup(code, i))
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return 1;
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}
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return 0;
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}
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static unsigned long case_lookup(unsigned long code, long l, long r, int field)
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{
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long m;
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/*
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* Do the binary search.
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*/
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while (l <= r) {
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/*
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* Determine a "mid" point and adjust to make sure the mid point is at
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* the beginning of a case mapping triple.
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*/
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m = (l + r) >> 1;
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m -= (m % 3);
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if (code > _uccase_map[m])
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l = m + 3;
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else if (code < _uccase_map[m])
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r = m - 3;
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else if (code == _uccase_map[m])
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return _uccase_map[m + field];
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}
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return code;
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}
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MBSTRING_API unsigned long php_unicode_toupper(unsigned long code)
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{
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int field;
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long l, r;
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if (php_unicode_is_upper(code))
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return code;
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if (php_unicode_is_lower(code)) {
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/*
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* The character is lower case.
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*/
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field = 2;
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l = _uccase_len[0];
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r = (l + _uccase_len[1]) - 3;
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} else {
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/*
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* The character is title case.
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*/
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field = 1;
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l = _uccase_len[0] + _uccase_len[1];
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r = _uccase_size - 3;
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}
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return case_lookup(code, l, r, field);
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}
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MBSTRING_API unsigned long php_unicode_tolower(unsigned long code)
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{
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int field;
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long l, r;
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if (php_unicode_is_lower(code))
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return code;
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if (php_unicode_is_upper(code)) {
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/*
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* The character is upper case.
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*/
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field = 1;
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l = 0;
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r = _uccase_len[0] - 3;
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} else {
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/*
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* The character is title case.
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*/
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field = 2;
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l = _uccase_len[0] + _uccase_len[1];
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r = _uccase_size - 3;
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}
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return case_lookup(code, l, r, field);
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}
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MBSTRING_API unsigned long php_unicode_totitle(unsigned long code)
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{
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int field;
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long l, r;
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if (php_unicode_is_title(code))
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return code;
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/*
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* The offset will always be the same for converting to title case.
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*/
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field = 2;
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if (php_unicode_is_upper(code)) {
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/*
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* The character is upper case.
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*/
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l = 0;
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r = _uccase_len[0] - 3;
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} else {
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/*
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* The character is lower case.
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*/
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l = _uccase_len[0];
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r = (l + _uccase_len[1]) - 3;
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}
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return case_lookup(code, l, r, field);
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}
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#define BE_ARY_TO_UINT32(ptr) (\
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((unsigned char*)(ptr))[0]<<24 |\
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((unsigned char*)(ptr))[1]<<16 |\
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((unsigned char*)(ptr))[2]<< 8 |\
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((unsigned char*)(ptr))[3] )
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#define UINT32_TO_BE_ARY(ptr,val) { \
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unsigned int v = val; \
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((unsigned char*)(ptr))[0] = (v>>24) & 0xff,\
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((unsigned char*)(ptr))[1] = (v>>16) & 0xff,\
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((unsigned char*)(ptr))[2] = (v>> 8) & 0xff,\
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((unsigned char*)(ptr))[3] = (v ) & 0xff;\
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}
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MBSTRING_API char *php_unicode_convert_case(int case_mode, char *srcstr, size_t srclen, size_t *ret_len,
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char *src_encoding TSRMLS_DC)
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{
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char *unicode, *newstr;
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size_t unicode_len;
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unsigned char *unicode_ptr;
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size_t i;
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unicode = php_mb_convert_encoding(srcstr, srclen, "UCS-4BE", src_encoding, &unicode_len TSRMLS_CC);
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if (unicode == NULL)
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return NULL;
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unicode_ptr = unicode;
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switch(case_mode) {
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case PHP_UNICODE_CASE_UPPER:
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for (i = 0; i < unicode_len; i+=4) {
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UINT32_TO_BE_ARY(&unicode_ptr[i],
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php_unicode_toupper(BE_ARY_TO_UINT32(&unicode_ptr[i])));
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}
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break;
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case PHP_UNICODE_CASE_LOWER:
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for (i = 0; i < unicode_len; i+=4) {
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UINT32_TO_BE_ARY(&unicode_ptr[i],
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php_unicode_tolower(BE_ARY_TO_UINT32(&unicode_ptr[i])));
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}
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break;
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case PHP_UNICODE_CASE_TITLE: {
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int mode = 0;
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for (i = 0; i < unicode_len; i+=4) {
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int res = php_unicode_is_prop(
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BE_ARY_TO_UINT32(&unicode_ptr[i]),
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UC_MN|UC_ME|UC_CF|UC_LM|UC_SK|UC_LU|UC_LL|UC_LT, 0);
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if (mode) {
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if (res) {
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UINT32_TO_BE_ARY(&unicode_ptr[i],
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php_unicode_tolower(BE_ARY_TO_UINT32(&unicode_ptr[i])));
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} else {
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mode = 0;
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}
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} else {
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if (res) {
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mode = 1;
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UINT32_TO_BE_ARY(&unicode_ptr[i],
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php_unicode_totitle(BE_ARY_TO_UINT32(&unicode_ptr[i])));
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}
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}
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}
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} break;
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}
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newstr = php_mb_convert_encoding(unicode, unicode_len, src_encoding, "UCS-4BE", ret_len TSRMLS_CC);
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efree(unicode);
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return newstr;
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}
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#endif /* HAVE_MBSTRING */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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