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axmol/cocos/2d/ccUTF8.cpp

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/*
* This file uses some implementations of gutf8.c in glib.
*
* gutf8.c - Operations on UTF-8 strings.
*
* Copyright (C) 1999 Tom Tromey
* Copyright (C) 2000 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "ccUTF8.h"
#include "platform/CCCommon.h"
NS_CC_BEGIN
int cc_wcslen(const unsigned short* str)
{
int i=0;
while(*str++) i++;
return i;
}
/* Code from GLIB gutf8.c starts here. */
#define UTF8_COMPUTE(Char, Mask, Len) \
if (Char < 128) \
{ \
Len = 1; \
Mask = 0x7f; \
} \
else if ((Char & 0xe0) == 0xc0) \
{ \
Len = 2; \
Mask = 0x1f; \
} \
else if ((Char & 0xf0) == 0xe0) \
{ \
Len = 3; \
Mask = 0x0f; \
} \
else if ((Char & 0xf8) == 0xf0) \
{ \
Len = 4; \
Mask = 0x07; \
} \
else if ((Char & 0xfc) == 0xf8) \
{ \
Len = 5; \
Mask = 0x03; \
} \
else if ((Char & 0xfe) == 0xfc) \
{ \
Len = 6; \
Mask = 0x01; \
} \
else \
Len = -1;
#define UTF8_LENGTH(Char) \
((Char) < 0x80 ? 1 : \
((Char) < 0x800 ? 2 : \
((Char) < 0x10000 ? 3 : \
((Char) < 0x200000 ? 4 : \
((Char) < 0x4000000 ? 5 : 6)))))
#define UTF8_GET(Result, Chars, Count, Mask, Len) \
(Result) = (Chars)[0] & (Mask); \
for ((Count) = 1; (Count) < (Len); ++(Count)) \
{ \
if (((Chars)[(Count)] & 0xc0) != 0x80) \
{ \
(Result) = -1; \
break; \
} \
(Result) <<= 6; \
(Result) |= ((Chars)[(Count)] & 0x3f); \
}
#define UNICODE_VALID(Char) \
((Char) < 0x110000 && \
(((Char) & 0xFFFFF800) != 0xD800) && \
((Char) < 0xFDD0 || (Char) > 0xFDEF) && \
((Char) & 0xFFFE) != 0xFFFE)
static const char utf8_skip_data[256] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5,
5, 5, 5, 6, 6, 1, 1
};
static const char *const g_utf8_skip = utf8_skip_data;
#define cc_utf8_next_char(p) (char *)((p) + g_utf8_skip[*(unsigned char *)(p)])
/*
* @str: the string to search through.
* @c: the character to not look for.
*
* Return value: the index of the last character that is not c.
* */
unsigned int cc_utf8_find_last_not_char(std::vector<unsigned short> str, unsigned short c)
{
int len = str.size();
int i = len - 1;
for (; i >= 0; --i)
if (str[i] != c) return i;
return i;
}
/*
* @str: the string to trim
* @index: the index to start trimming from.
*
* Trims str st str=[0, index) after the operation.
*
* Return value: the trimmed string.
* */
static void cc_utf8_trim_from(std::vector<unsigned short>* str, int index)
{
int size = str->size();
if (index >= size || index < 0)
return;
str->erase(str->begin() + index, str->begin() + size);
}
/*
* @ch is the unicode character whitespace?
*
* Reference: http://en.wikipedia.org/wiki/Whitespace_character#Unicode
*
* Return value: weather the character is a whitespace character.
* */
bool isspace_unicode(unsigned short ch)
{
return (ch >= 0x0009 && ch <= 0x000D) || ch == 0x0020 || ch == 0x0085 || ch == 0x00A0 || ch == 0x1680
|| (ch >= 0x2000 && ch <= 0x200A) || ch == 0x2028 || ch == 0x2029 || ch == 0x202F
|| ch == 0x205F || ch == 0x3000;
}
void cc_utf8_trim_ws(std::vector<unsigned short>* str)
{
int len = str->size();
if ( len <= 0 )
return;
int last_index = len - 1;
// Only start trimming if the last character is whitespace..
if (isspace_unicode((*str)[last_index]))
{
for (int i = last_index - 1; i >= 0; --i)
{
if (isspace_unicode((*str)[i]))
last_index = i;
else
break;
}
cc_utf8_trim_from(str, last_index);
}
}
/*
* cc_utf8_strlen:
* @p: pointer to the start of a UTF-8 encoded string.
* @max: the maximum number of bytes to examine. If @max
* is less than 0, then the string is assumed to be
* null-terminated. If @max is 0, @p will not be examined and
* may be %NULL.
*
* Returns the length of the string in characters.
*
* Return value: the length of the string in characters
**/
long
cc_utf8_strlen (const char * p, int max)
{
long len = 0;
const char *start = p;
if (!(p != NULL || max == 0))
{
return 0;
}
if (max < 0)
{
while (*p)
{
p = cc_utf8_next_char (p);
++len;
}
}
else
{
if (max == 0 || !*p)
return 0;
p = cc_utf8_next_char (p);
while (p - start < max && *p)
{
++len;
p = cc_utf8_next_char (p);
}
/* only do the last len increment if we got a complete
* char (don't count partial chars)
*/
if (p - start == max)
++len;
}
return len;
}
/*
* g_utf8_get_char:
* @p: a pointer to Unicode character encoded as UTF-8
*
* Converts a sequence of bytes encoded as UTF-8 to a Unicode character.
* If @p does not point to a valid UTF-8 encoded character, results are
* undefined. If you are not sure that the bytes are complete
* valid Unicode characters, you should use g_utf8_get_char_validated()
* instead.
*
* Return value: the resulting character
**/
static unsigned int
cc_utf8_get_char (const char * p)
{
int i, mask = 0, len;
unsigned int result;
unsigned char c = (unsigned char) *p;
UTF8_COMPUTE (c, mask, len);
if (len == -1)
return (unsigned int) - 1;
UTF8_GET (result, p, i, mask, len);
return result;
}
unsigned short* cc_utf8_to_utf16(const char* str_old, int length/* = -1 */, int* rUtf16Size/* = NULL */)
{
int len = cc_utf8_strlen(str_old, length);
if (rUtf16Size != NULL) {
*rUtf16Size = len;
}
unsigned short* str_new = new unsigned short[len + 1];
str_new[len] = 0;
for (int i = 0; i < len; ++i)
{
str_new[i] = cc_utf8_get_char(str_old);
str_old = cc_utf8_next_char(str_old);
}
return str_new;
}
std::vector<unsigned short> cc_utf16_vec_from_utf16_str(const unsigned short* str)
{
int len = cc_wcslen(str);
std::vector<unsigned short> str_new;
for (int i = 0; i < len; ++i)
{
str_new.push_back(str[i]);
}
return str_new;
}
/**
* cc_unichar_to_utf8:
* @c: a ISO10646 character code
* @outbuf: output buffer, must have at least 6 bytes of space.
* If %NULL, the length will be computed and returned
* and nothing will be written to @outbuf.
*
* Converts a single character to UTF-8.
*
* Return value: number of bytes written
**/
int
cc_unichar_to_utf8 (unsigned short c,
char *outbuf)
{
unsigned int len = 0;
int first;
int i;
if (c < 0x80)
{
first = 0;
len = 1;
}
else if (c < 0x800)
{
first = 0xc0;
len = 2;
}
else if (c < 0x10000)
{
first = 0xe0;
len = 3;
}
else if (c < 0x200000)
{
first = 0xf0;
len = 4;
}
else if (c < 0x4000000)
{
first = 0xf8;
len = 5;
}
else
{
first = 0xfc;
len = 6;
}
if (outbuf)
{
for (i = len - 1; i > 0; --i)
{
outbuf[i] = (c & 0x3f) | 0x80;
c >>= 6;
}
outbuf[0] = c | first;
}
return len;
}
#define SURROGATE_VALUE(h,l) (((h) - 0xd800) * 0x400 + (l) - 0xdc00 + 0x10000)
/**
* cc_utf16_to_utf8:
* @str: a UTF-16 encoded string
* @len: the maximum length of @str to use. If @len < 0, then
* the string is terminated with a 0 character.
* @items_read: location to store number of words read, or %NULL.
* If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
* returned in case @str contains a trailing partial
* character. If an error occurs then the index of the
* invalid input is stored here.
* @items_written: location to store number of bytes written, or %NULL.
* The value stored here does not include the trailing
* 0 byte.
* @error: location to store the error occuring, or %NULL to ignore
* errors. Any of the errors in #GConvertError other than
* %G_CONVERT_ERROR_NO_CONVERSION may occur.
*
* Convert a string from UTF-16 to UTF-8. The result will be
* terminated with a 0 byte.
*
* Return value: a pointer to a newly allocated UTF-8 string.
* This value must be freed with free(). If an
* error occurs, %NULL will be returned and
* @error set.
**/
char *
cc_utf16_to_utf8 (const unsigned short *str,
long len,
long *items_read,
long *items_written)
{
/* This function and g_utf16_to_ucs4 are almost exactly identical - The lines that differ
* are marked.
*/
const unsigned short *in;
char *out;
char *result = NULL;
int n_bytes;
unsigned short high_surrogate;
if (str == 0) return NULL;
n_bytes = 0;
in = str;
high_surrogate = 0;
while ((len < 0 || in - str < len) && *in)
{
unsigned short c = *in;
unsigned short wc;
if (c >= 0xdc00 && c < 0xe000) /* low surrogate */
{
if (high_surrogate)
{
wc = SURROGATE_VALUE (high_surrogate, c);
high_surrogate = 0;
}
else
{
CCLOGERROR("Invalid sequence in conversion input");
goto err_out;
}
}
else
{
if (high_surrogate)
{
CCLOGERROR("Invalid sequence in conversion input");
goto err_out;
}
if (c >= 0xd800 && c < 0xdc00) /* high surrogate */
{
high_surrogate = c;
goto next1;
}
else
wc = c;
}
/********** DIFFERENT for UTF8/UCS4 **********/
n_bytes += UTF8_LENGTH (wc);
next1:
in++;
}
if (high_surrogate && !items_read)
{
CCLOGERROR("Partial character sequence at end of input");
goto err_out;
}
/* At this point, everything is valid, and we just need to convert
*/
/********** DIFFERENT for UTF8/UCS4 **********/
result = new char[n_bytes + 1];
high_surrogate = 0;
out = result;
in = str;
while (out < result + n_bytes)
{
unsigned short c = *in;
unsigned short wc;
if (c >= 0xdc00 && c < 0xe000) /* low surrogate */
{
wc = SURROGATE_VALUE (high_surrogate, c);
high_surrogate = 0;
}
else if (c >= 0xd800 && c < 0xdc00) /* high surrogate */
{
high_surrogate = c;
goto next2;
}
else
wc = c;
/********** DIFFERENT for UTF8/UCS4 **********/
out += cc_unichar_to_utf8 (wc, out);
next2:
in++;
}
/********** DIFFERENT for UTF8/UCS4 **********/
*out = '\0';
if (items_written)
/********** DIFFERENT for UTF8/UCS4 **********/
*items_written = out - result;
err_out:
if (items_read)
*items_read = in - str;
return result;
}
NS_CC_END
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