renamed as the rest

git-svn-id: http://svn.miranda-ng.org/main/trunk@645 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 406 insertions, 0 deletions

diff --git a/plugins/Mir_core/utf.cpp b/plugins/Mir_core/utf.cpp
new file mode 100644
index 0000000000..5ec6042758
--- /dev/null
+++ b/plugins/Mir_core/utf.cpp
@@ -0,0 +1,406 @@
+/*

+

+Miranda IM: the free IM client for Microsoft* Windows*

+

+Copyright 2000-2009 Miranda ICQ/IM project, 

+all portions of this codebase are copyrighted to the people

+listed in contributors.txt.

+

+ Copyright 2000 Alexandre Julliard of Wine project 

+ (UTF-8 conversion routines)

+

+This program is free software; you can redistribute it and/or

+modify it under the terms of the GNU General Public License

+as published by the Free Software Foundation; either version 2

+of the License, or (at your option) any later version.

+

+This program is distributed in the hope that it will be useful, 

+but WITHOUT ANY WARRANTY; without even the implied warranty of

+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+GNU General Public License for more details.

+

+You should have received a copy of the GNU General Public License

+along with this program; if not, write to the Free Software

+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

+*/

+

+#include "commonheaders.h"

+

+/* number of following bytes in sequence based on first byte value (for bytes above 0x7f) */

+static const char utf8_length[128] =

+{

+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80-0x8f */

+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90-0x9f */

+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0-0xaf */

+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0-0xbf */

+	0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xc0-0xcf */

+	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xd0-0xdf */

+	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xe0-0xef */

+	3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0-0xff */

+};

+

+/* first byte mask depending on UTF-8 sequence length */

+static const unsigned char utf8_mask[4] = { 0x7f, 0x1f, 0x0f, 0x07 };

+

+/* minimum Unicode value depending on UTF-8 sequence length */

+static const unsigned int utf8_minval[4] = { 0x0, 0x80, 0x800, 0x10000 };

+

+/* get the next char value taking surrogates into account */

+static unsigned int getSurrogateValue(const wchar_t *src, unsigned int srclen)

+{

+	if (src[0] >= 0xd800 && src[0] <= 0xdfff) { /* surrogate pair */

+		if (src[0] > 0xdbff || /* invalid high surrogate */

+			srclen <= 1 ||     /* missing low surrogate */

+			src[1] < 0xdc00 || src[1] > 0xdfff) /* invalid low surrogate */

+			return 0;

+		return 0x10000 + ((src[0] & 0x3ff) << 10) + (src[1] & 0x3ff);

+	}

+	return src[0];

+}

+

+/* query necessary dst length for src string */

+static int Ucs2toUtf8Len(const wchar_t *src, unsigned int srclen)

+{

+	int len;

+	unsigned int val;

+

+	for (len = 0; srclen; srclen--, src++) {

+		if (*src < 0x80) { /* 0x00-0x7f: 1 byte */

+			len++;

+			continue;

+		}

+		if (*src < 0x800) { /* 0x80-0x7ff: 2 bytes */

+			len += 2;

+			continue;

+		}

+		if ( !(val = getSurrogateValue(src, srclen)))

+			return -2;

+

+		if (val < 0x10000)  /* 0x800-0xffff: 3 bytes */

+			len += 3;

+		else { /* 0x10000-0x10ffff: 4 bytes */

+			len += 4;

+			src++;

+			srclen--;

+		}

+	}

+	return len;

+}

+

+MIR_CORE_DLL(int) Ucs2toUtf8Len(const wchar_t *src)

+{

+	if (src == 0)

+		return 0;

+

+	return Ucs2toUtf8Len(src, (int)wcslen(src));

+}

+

+/* wide char to UTF-8 string conversion */

+/* return -1 on dst buffer overflow, -2 on invalid input char */

+int Ucs2toUtf8(const wchar_t *src, int srclen, char *dst, int dstlen)

+{

+    int len;

+

+    for (len = dstlen; srclen; srclen--, src++)

+    {

+        WCHAR ch = *src;

+        unsigned int val;

+

+        if (ch < 0x80)  /* 0x00-0x7f: 1 byte */

+        {

+            if ( !len--) return -1;  /* overflow */

+            *dst++ = ch;

+            continue;

+        }

+

+        if (ch < 0x800)  /* 0x80-0x7ff: 2 bytes */

+        {

+            if ((len -= 2) < 0) return -1;  /* overflow */

+            dst[1] = 0x80 | (ch & 0x3f);

+            ch >>= 6;

+            dst[0] = 0xc0 | ch;

+            dst += 2;

+            continue;

+        }

+

+        if ( !(val = getSurrogateValue(src, srclen)))

+        {

+            return -2;

+        }

+

+        if (val < 0x10000)  /* 0x800-0xffff: 3 bytes */

+        {

+            if ((len -= 3) < 0) return -1;  /* overflow */

+            dst[2] = 0x80 | (val & 0x3f);

+            val >>= 6;

+            dst[1] = 0x80 | (val & 0x3f);

+            val >>= 6;

+            dst[0] = 0xe0 | val;

+            dst += 3;

+        }

+        else   /* 0x10000-0x10ffff: 4 bytes */

+        {

+            if ((len -= 4) < 0) return -1;  /* overflow */

+            dst[3] = 0x80 | (val & 0x3f);

+            val >>= 6;

+            dst[2] = 0x80 | (val & 0x3f);

+            val >>= 6;

+            dst[1] = 0x80 | (val & 0x3f);

+            val >>= 6;

+            dst[0] = 0xf0 | val;

+            dst += 4;

+            src++;

+            srclen--;

+        }

+    }

+    return dstlen - len;

+}

+

+/* helper for the various utf8 mbstowcs functions */

+static unsigned int decodeUtf8Char(unsigned char ch, const char **str, const char *strend)

+{

+    unsigned int len = utf8_length[ch-0x80];

+    unsigned int res = ch & utf8_mask[len];

+    const char *end = *str + len;

+

+    if (end > strend) return ~0;

+    switch(len)

+    {

+    case 3:

+        if ((ch = end[-3] ^ 0x80) >= 0x40) break;

+        res = (res << 6) | ch;

+        (*str)++;

+    case 2:

+        if ((ch = end[-2] ^ 0x80) >= 0x40) break;

+        res = (res << 6) | ch;

+        (*str)++;

+    case 1:

+        if ((ch = end[-1] ^ 0x80) >= 0x40) break;

+        res = (res << 6) | ch;

+        (*str)++;

+        if (res < utf8_minval[len]) break;

+        return res;

+    }

+    return ~0;

+}

+

+/* query necessary dst length for src string */

+static inline int Utf8toUcs2Len(const char *src, int srclen)

+{

+    int ret = 0;

+    unsigned int res;

+    const char *srcend = src + srclen;

+

+    while (src < srcend)

+    {

+        unsigned char ch = *src++;

+        if (ch < 0x80)  /* special fast case for 7-bit ASCII */

+        {

+            ret++;

+            continue;

+        }

+        if ((res = decodeUtf8Char(ch, &src, srcend)) <= 0x10ffff)

+        {

+            if (res > 0xffff) ret++;

+            ret++;

+        }

+        else return -2;  /* bad char */

+        /* otherwise ignore it */

+    }

+    return ret;

+}

+

+/* UTF-8 to wide char string conversion */

+/* return -1 on dst buffer overflow, -2 on invalid input char */

+int Utf8toUcs2(const char *src, int srclen, wchar_t *dst, int dstlen)

+{

+    unsigned int res;

+    const char *srcend = src + srclen;

+    wchar_t *dstend = dst + dstlen;

+

+    while ((dst < dstend) && (src < srcend))

+    {

+        unsigned char ch = *src++;

+        if (ch < 0x80)  /* special fast case for 7-bit ASCII */

+        {

+            *dst++ = ch;

+            continue;

+        }

+        if ((res = decodeUtf8Char(ch, &src, srcend)) <= 0xffff)

+        {

+            *dst++ = res;

+        }

+        else if (res <= 0x10ffff)  /* we need surrogates */

+        {

+            if (dst == dstend - 1) return -1;  /* overflow */

+            res -= 0x10000;

+            *dst++ = 0xd800 | (res >> 10);

+            *dst++ = 0xdc00 | (res & 0x3ff);

+        }

+        else return -2;  /* bad char */

+        /* otherwise ignore it */

+    }

+    if (src < srcend) return -1;  /* overflow */

+    return dstlen - (dstend - dst);

+}

+

+/////////////////////////////////////////////////////////////////////////////////////////

+// Utf8Decode - converts UTF8-encoded string to the UCS2/MBCS format

+

+MIR_CORE_DLL(char*) Utf8DecodeCP(char* str, int codepage, wchar_t** ucs2)

+{

+	int len; 

+	bool needs_free = false;

+	wchar_t* tempBuf = NULL;

+	if (ucs2)

+		*ucs2 = NULL;

+

+	if (str == NULL)

+		return NULL;

+

+	len = (int)strlen(str);

+

+	if (len < 2) {

+		if (ucs2 != NULL) {

+			*ucs2 = tempBuf = (wchar_t*)mir_alloc((len + 1) * sizeof(wchar_t));

+			MultiByteToWideChar(codepage, 0, str, len, tempBuf, len);

+			tempBuf[len] = 0;

+		}

+		return str;

+	}

+

+	int destlen = Utf8toUcs2Len(str, len);

+	if (destlen < 0)

+		return NULL;

+

+	if (ucs2 == NULL) {

+		__try

+		{

+			tempBuf = (wchar_t*)alloca((destlen + 1) * sizeof(wchar_t));

+		}

+		__except(EXCEPTION_EXECUTE_HANDLER)

+		{

+			tempBuf = NULL;

+			needs_free = true;

+		}

+	}

+

+	if (tempBuf == NULL) {

+		tempBuf = (wchar_t*)mir_alloc((destlen + 1) * sizeof(wchar_t));

+		if (tempBuf == NULL)

+			return NULL;

+	}

+

+	Utf8toUcs2(str, len, tempBuf, destlen); 

+	tempBuf[destlen] = 0;

+	WideCharToMultiByte(codepage, 0, tempBuf, -1, str, len + 1, "?", NULL);

+

+	if (ucs2)

+		*ucs2 = tempBuf;

+	else if (needs_free)

+		mir_free(tempBuf);

+

+	return str;

+}

+

+MIR_CORE_DLL(char*) Utf8Decode(char* str, wchar_t** ucs2)

+{

+	return Utf8DecodeCP(str, LangPackGetDefaultCodePage(), ucs2);

+}

+

+MIR_CORE_DLL(wchar_t*) Utf8DecodeW(const char* str)

+{

+	if (str == NULL)

+		return NULL;

+

+	int len = (int)strlen(str);

+

+	int destlen = Utf8toUcs2Len(str, len);

+	if (destlen < 0) return NULL;

+

+	wchar_t* ucs2 = (wchar_t*)mir_alloc((destlen + 1) * sizeof(wchar_t));

+	if (ucs2 == NULL) return NULL;

+

+	if (Utf8toUcs2(str, len, ucs2, destlen) >= 0)

+	{

+		ucs2[destlen] = 0;

+		return ucs2;

+	}

+

+	mir_free(ucs2);

+

+	return NULL;

+}

+

+/////////////////////////////////////////////////////////////////////////////////////////

+// Utf8Encode - converts MBCS string to the UTF8-encoded format

+

+MIR_CORE_DLL(char*) Utf8EncodeCP(const char* src, int codepage)

+{

+	int len; 

+    bool needs_free = false;

+	char* result = NULL;

+	wchar_t* tempBuf;

+

+	if (src == NULL)

+		return NULL;

+

+	len = (int)strlen(src);

+

+	__try

+	{

+		tempBuf = (wchar_t*)alloca((len + 1) * sizeof(wchar_t));

+	}

+	__except(EXCEPTION_EXECUTE_HANDLER)

+	{

+		tempBuf = (wchar_t*)mir_alloc((len + 1) * sizeof(wchar_t));

+		if (tempBuf == NULL) return NULL;

+		needs_free = true;

+	}

+

+	len = MultiByteToWideChar(codepage, 0, src, -1, tempBuf, len + 1);

+

+	int destlen = Ucs2toUtf8Len(tempBuf, len);

+	if (destlen >= 0)

+	{

+		result = (char*)mir_alloc(destlen + 1);

+		if (result)

+		{

+			Ucs2toUtf8(tempBuf, len, result, destlen);

+			result[destlen] = 0;

+		}

+	}

+

+	if (needs_free)

+		mir_free(tempBuf);

+

+	return result;

+}

+

+MIR_CORE_DLL(char*) Utf8Encode(const char* src)

+{

+	return Utf8EncodeCP(src, LangPackGetDefaultCodePage());

+}

+

+/////////////////////////////////////////////////////////////////////////////////////////

+// Utf8Encode - converts UCS2 string to the UTF8-encoded format

+

+MIR_CORE_DLL(char*) Utf8EncodeW(const wchar_t* src)

+{

+	if (src == NULL)

+		return NULL;

+

+	int len = (int)wcslen(src);

+

+	int destlen = Ucs2toUtf8Len(src, len);

+	if (destlen < 0) return NULL;

+

+	char* result = (char*)mir_alloc(destlen + 1);

+	if (result == NULL)

+		return NULL;

+

+	Ucs2toUtf8(src, len, result, destlen);

+	result[destlen] = 0;

+

+	return result;

+}