charset.h
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /*
- * Copyright (C) 2001 Edmund Grimley Evans <edmundo@rano.org>
- *
- * 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 <stdlib.h>
- /*
- * These functions are like the C library's mbtowc() and wctomb(),
- * but instead of depending on the locale they always work in UTF-8,
- * and they use int instead of wchar_t.
- */
- int utf8_mbtowc(int *pwc, const char *s, size_t n);
- int utf8_wctomb(char *s, int wc);
- /*
- * This is an object-oriented version of mbtowc() and wctomb().
- * The caller first uses charset_find() to get a pointer to struct
- * charset, then uses the mbtowc() and wctomb() methods on it.
- * The function charset_max() gives the maximum length of a
- * multibyte character in that encoding.
- * This API is only appropriate for stateless encodings like UTF-8
- * or ISO-8859-3, but I have no intention of implementing anything
- * other than UTF-8 and 8-bit encodings.
- *
- * MINOR BUG: If there is no memory charset_find() may return 0 and
- * there is no way to distinguish this case from an unknown encoding.
- */
- struct charset;
- struct charset *charset_find(const char *code);
- int charset_mbtowc(struct charset *charset, int *pwc, const char *s, size_t n);
- int charset_wctomb(struct charset *charset, char *s, int wc);
- int charset_max(struct charset *charset);
- /*
- * Function to convert a buffer from one encoding to another.
- * Invalid bytes are replaced by '#', and characters that are
- * not available in the target encoding are replaced by '?'.
- * Each of TO and TOLEN may be zero if the result is not wanted.
- * The input or output may contain null bytes, but the output
- * buffer is also null-terminated, so it is all right to
- * use charset_convert(fromcode, tocode, s, strlen(s), &t, 0).
- *
- * Return value:
- *
- * -2 : memory allocation failed
- * -1 : unknown encoding
- * 0 : data was converted exactly
- * 1 : valid data was converted approximately (using '?')
- * 2 : input was invalid (but still converted, using '#')
- */
- int charset_convert(const char *fromcode, const char *tocode,
- const char *from, size_t fromlen,
- char **to, size_t *tolen);