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utf8util.h
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/* Copyright 2002-2015 Paul Hsieh
* This file is part of Bstrlib.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of bstrlib nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Alternatively, the contents of this file may be used under the terms of
* GNU General Public License Version 2 (the "GPL").
*/
#ifndef UTF8_UNICODE_UTILITIES
#define UTF8_UNICODE_UTILITIES
#include <limits.h>
/* If bstrlib.h has not been included, define the visibility attribute here.
The #ifndef guard ensures we don't conflict if bstrlib.h came first. */
#ifndef BSTR_PUBLIC
# if __GNUC__ >= 4
# define BSTR_PUBLIC __attribute__ ((visibility ("default")))
# else
# define BSTR_PUBLIC
# endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if INT_MAX >= 0x7fffffffUL
typedef int cpUcs4;
#elif LONG_MAX >= 0x7fffffffUL
typedef long cpUcs4;
#else
#error This compiler is not supported
#endif
#if UINT_MAX == 0xFFFF
typedef unsigned int cpUcs2;
#elif USHRT_MAX == 0xFFFF
typedef unsigned short cpUcs2;
#elif UCHAR_MAX == 0xFFFF
typedef unsigned char cpUcs2;
#else
#error This compiler is not supported
#endif
#define isLegalUnicodeCodePoint(v) \
((((v) < 0xD800L) || ((v) > 0xDFFFL)) && \
(((unsigned long)(v)) <= 0x0010FFFFL) && \
(((v)|0x1F0001) != 0x1FFFFFL))
struct utf8Iterator {
unsigned char *data;
int slen;
int start;
int next;
int error;
};
#define utf8IteratorNoMore(it) (!(it) || (it)->next >= (it)->slen)
BSTR_PUBLIC void utf8IteratorInit(struct utf8Iterator *iter,
unsigned char *data, int slen);
BSTR_PUBLIC void utf8IteratorUninit(struct utf8Iterator *iter);
BSTR_PUBLIC cpUcs4 utf8IteratorGetNextCodePoint(struct utf8Iterator *iter,
cpUcs4 errCh);
BSTR_PUBLIC cpUcs4 utf8IteratorGetCurrCodePoint(struct utf8Iterator *iter,
cpUcs4 errCh);
BSTR_PUBLIC int utf8ScanBackwardsForCodePoint(const unsigned char *msg,
int len, int pos, cpUcs4 *out);
#ifdef __cplusplus
}
#endif
#endif /* UTF8_UNICODE_UTILITIES */
utf8Iterator
Definition utf8util.h:83