63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*
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* This source file is part of the bstring string library. This code was
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* written by Paul Hsieh in 2002-2015, and is covered by the BSD open source
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* license and the GPL. Refer to the accompanying documentation for details
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* on usage and license.
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*/
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/*
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* utf8util.h
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*
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* This file defines the interface to the utf8 utility functions.
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*/
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#ifndef UTF8_UNICODE_UTILITIES
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#define UTF8_UNICODE_UTILITIES
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#include <limits.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if INT_MAX >= 0x7fffffffUL
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typedef int cpUcs4;
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#elif LONG_MAX >= 0x7fffffffUL
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typedef long cpUcs4;
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#else
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#error This compiler is not supported
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#endif
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#if UINT_MAX == 0xFFFF
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typedef unsigned int cpUcs2;
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#elif USHRT_MAX == 0xFFFF
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typedef unsigned short cpUcs2;
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#elif UCHAR_MAX == 0xFFFF
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typedef unsigned char cpUcs2;
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#else
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#error This compiler is not supported
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#endif
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#define isLegalUnicodeCodePoint(v) ((((v) < 0xD800L) || ((v) > 0xDFFFL)) && (((unsigned long)(v)) <= 0x0010FFFFL) && (((v)|0x1F0001) != 0x1FFFFFL))
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struct utf8Iterator {
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unsigned char* data;
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int slen;
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int start, next;
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int error;
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};
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#define utf8IteratorNoMore(it) (!(it) || (it)->next >= (it)->slen)
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extern void utf8IteratorInit (struct utf8Iterator* iter, unsigned char* data, int slen);
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extern void utf8IteratorUninit (struct utf8Iterator* iter);
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extern cpUcs4 utf8IteratorGetNextCodePoint (struct utf8Iterator* iter, cpUcs4 errCh);
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extern cpUcs4 utf8IteratorGetCurrCodePoint (struct utf8Iterator* iter, cpUcs4 errCh);
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extern int utf8ScanBackwardsForCodePoint (unsigned char* msg, int len, int pos, cpUcs4* out);
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#ifdef __cplusplus
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}
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#endif
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#endif /* UTF8_UNICODE_UTILITIES */
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