(PHP mb_convert_case) Add function that will convert the case of a string

                      Respecting it's encoding (or the internal encoding).

1 files changed, 284 insertions, 0 deletions

diff --git a/ext/mbstring/php_unicode.c b/ext/mbstring/php_unicode.c
new file mode 100644
index 0000000000..ec6d9987f3
--- /dev/null
+++ b/ext/mbstring/php_unicode.c
@@ -0,0 +1,284 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 4                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2002 The PHP Group                                |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 2.02 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available at through the world-wide-web at                           |
+   | http://www.php.net/license/2_02.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: Wez Furlong (wez@thebrainroom.com)                           |
+   +----------------------------------------------------------------------+
+
+	Based on code from ucdata-2.5, which has the following Copyright:
+   
+	Copyright 2001 Computing Research Labs, New Mexico State University
+ 
+	Permission is hereby granted, free of charge, to any person obtaining a
+	copy of this software and associated documentation files (the "Software"),
+	to deal in the Software without restriction, including without limitation
+	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+	and/or sell copies of the Software, and to permit persons to whom the
+	Software is furnished to do so, subject to the following conditions:
+ 
+	The above copyright notice and this permission notice shall be included in
+	all copies or substantial portions of the Software.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "php.h"
+#include "php_ini.h"
+
+#if HAVE_MBSTRING
+
+/* include case folding data generated from the official UnicodeData.txt file */
+#include "mbstring.h"
+#include "php_unicode.h"
+#include "unicode_data.h"
+
+/*
+ * A simple array of 32-bit masks for lookup.
+ */
+static unsigned long masks32[32] = {
+    0x00000001, 0x00000002, 0x00000004, 0x00000008, 0x00000010, 0x00000020,
+    0x00000040, 0x00000080, 0x00000100, 0x00000200, 0x00000400, 0x00000800,
+    0x00001000, 0x00002000, 0x00004000, 0x00008000, 0x00010000, 0x00020000,
+    0x00040000, 0x00080000, 0x00100000, 0x00200000, 0x00400000, 0x00800000,
+    0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, 0x20000000,
+    0x40000000, 0x80000000
+};
+
+
+static int prop_lookup(unsigned long code, unsigned long n)
+{
+	long l, r, m;
+
+	/*
+	 * There is an extra node on the end of the offsets to allow this routine
+	 * to work right.  If the index is 0xffff, then there are no nodes for the
+	 * property.
+	 */
+	if ((l = _ucprop_offsets[n]) == 0xffff)
+		return 0;
+
+	/*
+	 * Locate the next offset that is not 0xffff.  The sentinel at the end of
+	 * the array is the max index value.
+	 */
+	for (m = 1; n + m < _ucprop_size && _ucprop_offsets[n + m] == 0xffff; m++)
+		;
+
+	r = _ucprop_offsets[n + m] - 1;
+
+	while (l <= r) {
+		/*
+		 * Determine a "mid" point and adjust to make sure the mid point is at
+		 * the beginning of a range pair.
+		 */
+		m = (l + r) >> 1;
+		m -= (m & 1);
+		if (code > _ucprop_ranges[m + 1])
+			l = m + 2;
+		else if (code < _ucprop_ranges[m])
+			r = m - 2;
+		else if (code >= _ucprop_ranges[m] && code <= _ucprop_ranges[m + 1])
+			return 1;
+	}
+	return 0;
+
+}
+
+PHPAPI int php_unicode_is_prop(unsigned long code, unsigned long mask1,
+		unsigned long mask2)
+{
+	unsigned long i;
+
+	if (mask1 == 0 && mask2 == 0)
+		return 0;
+
+	for (i = 0; mask1 && i < 32; i++) {
+		if ((mask1 & masks32[i]) && prop_lookup(code, i))
+			return 1;
+	}
+
+	for (i = 32; mask2 && i < _ucprop_size; i++) {
+		if ((mask2 & masks32[i & 31]) && prop_lookup(code, i))
+			return 1;
+	}
+
+	return 0;
+}
+
+static unsigned long case_lookup(unsigned long code, long l, long r, int field)
+{
+	long m;
+
+	/*
+	 * Do the binary search.
+	 */
+	while (l <= r) {
+		/*
+		 * Determine a "mid" point and adjust to make sure the mid point is at
+		 * the beginning of a case mapping triple.
+		 */
+		m = (l + r) >> 1;
+		m -= (m % 3);
+		if (code > _uccase_map[m])
+			l = m + 3;
+		else if (code < _uccase_map[m])
+			r = m - 3;
+		else if (code == _uccase_map[m])
+			return _uccase_map[m + field];
+	}
+
+	return code;
+}
+
+PHPAPI unsigned long php_unicode_toupper(unsigned long code)
+{
+	int field;
+	long l, r;
+
+	if (php_unicode_is_upper(code))
+		return code;
+
+	if (php_unicode_is_lower(code)) {
+		/*
+		 * The character is lower case.
+		 */
+		field = 2;
+		l = _uccase_len[0];
+		r = (l + _uccase_len[1]) - 3;
+	} else {
+		/*
+		 * The character is title case.
+		 */
+		field = 1;
+		l = _uccase_len[0] + _uccase_len[1];
+		r = _uccase_size - 3;
+	}
+	return case_lookup(code, l, r, field);
+}
+
+PHPAPI unsigned long php_unicode_tolower(unsigned long code)
+{
+	int field;
+	long l, r;
+
+	if (php_unicode_is_lower(code))
+		return code;
+
+	if (php_unicode_is_upper(code)) {
+		/*
+		 * The character is upper case.
+		 */
+		field = 1;
+		l = 0;
+		r = _uccase_len[0] - 3;
+	} else {
+		/*
+		 * The character is title case.
+		 */
+		field = 2;
+		l = _uccase_len[0] + _uccase_len[1];
+		r = _uccase_size - 3;
+	}
+	return case_lookup(code, l, r, field);
+}
+
+PHPAPI unsigned long php_unicode_totitle(unsigned long code)
+{
+	int field;
+	long l, r;
+
+	if (php_unicode_is_title(code))
+		return code;
+
+	/*
+	 * The offset will always be the same for converting to title case.
+	 */
+	field = 2;
+
+	if (php_unicode_is_upper(code)) {
+		/*
+		 * The character is upper case.
+		 */
+		l = 0;
+		r = _uccase_len[0] - 3;
+	} else {
+		/*
+		 * The character is lower case.
+		 */
+		l = _uccase_len[0];
+		r = (l + _uccase_len[1]) - 3;
+	}
+	return case_lookup(code, l, r, field);
+
+}
+
+#ifdef WORDS_BIGENDIAN
+# define NATIVE_UNICODE_ENCODING "UCS-4BE"
+#else
+# define NATIVE_UNICODE_ENCODING "UCS-4LE"
+#endif
+
+PHPAPI char *php_unicode_convert_case(int case_mode, char *srcstr, size_t srclen, size_t *ret_len,
+		char *src_encoding TSRMLS_DC)
+{
+	char *unicode, *newstr;
+	size_t unicode_len;
+	unsigned long *unicode_ptr;
+	int i;
+
+	unicode = php_mb_convert_encoding(srcstr, srclen, NATIVE_UNICODE_ENCODING, src_encoding, &unicode_len TSRMLS_CC);
+	if (unicode == NULL)
+		return NULL;
+	
+	unicode_ptr = (unsigned long*)unicode;
+
+	switch(case_mode) {
+		case PHP_UNICODE_CASE_UPPER:
+			for (i = 0; i < unicode_len / sizeof(unsigned long); i++) {
+				unicode_ptr[i] = php_unicode_toupper(unicode_ptr[i]);
+			}
+			break;
+
+		case PHP_UNICODE_CASE_LOWER:
+			for (i = 0; i < unicode_len / sizeof(unsigned long); i++) {
+				unicode_ptr[i] = php_unicode_tolower(unicode_ptr[i]);
+			}
+			break;
+
+		case PHP_UNICODE_CASE_TITLE:
+			for (i = 0; i < unicode_len / sizeof(unsigned long); i++) {
+				unicode_ptr[i] = php_unicode_totitle(unicode_ptr[i]);
+			}
+			break;
+
+	}
+	
+	newstr = php_mb_convert_encoding(unicode, unicode_len, src_encoding, NATIVE_UNICODE_ENCODING, ret_len TSRMLS_CC);
+	efree(unicode);
+
+	return newstr;
+}
+
+
+#endif /* HAVE_MBSTRING */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */