utf8.h
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#ifndef __UTF_H__
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# include "unicode/utf.h"
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#endif
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#ifndef __UTF8_H__
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#define __UTF8_H__
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#ifdef U_UTF8_IMPL
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U_CAPI
const uint8_t
00044 utf8_countTrailBytes[256];
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#else
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U_CFUNC
const uint8_t U_IMPORT
00047 utf8_countTrailBytes[256];
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#endif
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#define UTF8_COUNT_TRAIL_BYTES(leadByte) (utf8_countTrailBytes[(uint8_t)leadByte])
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#define UTF8_MASK_LEAD_BYTE(leadByte, countTrailBytes) ((leadByte)&=(1<<(6-(countTrailBytes)))-1)
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00060 U_CAPI
UChar32 U_EXPORT2
00061 utf8_nextCharSafeBody(
const uint8_t *s, int32_t *pi, int32_t length, UChar32 c, UBool strict);
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00063 U_CAPI int32_t U_EXPORT2
00064 utf8_appendCharSafeBody(uint8_t *s, int32_t i, int32_t length, UChar32 c);
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00066 U_CAPI
UChar32 U_EXPORT2
00067 utf8_prevCharSafeBody(
const uint8_t *s, int32_t start, int32_t *pi, UChar32 c, UBool strict);
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00069 U_CAPI int32_t U_EXPORT2
00070 utf8_back1SafeBody(
const uint8_t *s, int32_t start, int32_t i);
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#define UTF8_IS_SINGLE(uchar) (((uchar)&0x80)==0)
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#define UTF8_IS_LEAD(uchar) ((uint8_t)((uchar)-0xc0)<0x3e)
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#define UTF8_IS_TRAIL(uchar) (((uchar)&0xc0)==0x80)
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#define UTF8_NEED_MULTIPLE_UCHAR(c) ((uint32_t)(c)>0x7f)
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#if 1
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# define UTF8_CHAR_LENGTH(c) \
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((uint32_t)(c)<=0x7f ? 1 : \
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((uint32_t)(c)<=0x7ff ? 2 : \
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((uint32_t)((c)-0x10000)>0xfffff ? 3 : 4) \
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) \
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)
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#else
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# define UTF8_CHAR_LENGTH(c) \
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((uint32_t)(c)<=0x7f ? 1 : \
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((uint32_t)(c)<=0x7ff ? 2 : \
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((uint32_t)(c)<=0xffff ? 3 : \
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((uint32_t)(c)<=0x10ffff ? 4 : \
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((uint32_t)(c)<=0x3ffffff ? 5 : \
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((uint32_t)(c)<=0x7fffffff ? 6 : 3) \
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) \
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) \
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) \
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) \
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)
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#endif
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#define UTF8_MAX_CHAR_LENGTH 4
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#define UTF8_ARRAY_SIZE(size) ((5*(size))/2)
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#define UTF8_GET_CHAR_UNSAFE(s, i, c) { \
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int32_t __I=(int32_t)(i); \
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UTF8_SET_CHAR_START_UNSAFE(s, __I); \
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UTF8_NEXT_CHAR_UNSAFE(s, __I, c); \
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}
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#define UTF8_GET_CHAR_SAFE(s, start, i, length, c, strict) { \
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int32_t __I=(int32_t)(i); \
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UTF8_SET_CHAR_START_SAFE(s, start, __I); \
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UTF8_NEXT_CHAR_SAFE(s, __I, length, c, strict); \
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}
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#define UTF8_NEXT_CHAR_UNSAFE(s, i, c) { \
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(c)=(s)[(i)++]; \
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if((uint8_t)((c)-0xc0)<0x35) { \
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uint8_t __count=UTF8_COUNT_TRAIL_BYTES(c); \
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UTF8_MASK_LEAD_BYTE(c, __count); \
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switch(__count) { \
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\
00157 case 3: \
00158 (c)=((c)<<6)|((s)[(i)++]&0x3f); \
00159 case 2: \
00160 (c)=((c)<<6)|((s)[(i)++]&0x3f); \
00161 case 1: \
00162 (c)=((c)<<6)|((s)[(i)++]&0x3f); \
00163 \
00164 break; \
00165 } \
00166 } \
00167 }
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#define UTF8_APPEND_CHAR_UNSAFE(s, i, c) { \
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if((uint32_t)(c)<=0x7f) { \
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(s)[(i)++]=(uint8_t)(c); \
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} else { \
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if((uint32_t)(c)<=0x7ff) { \
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(s)[(i)++]=(uint8_t)(((c)>>6)|0xc0); \
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} else { \
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if((uint32_t)(c)<=0xffff) { \
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(s)[(i)++]=(uint8_t)(((c)>>12)|0xe0); \
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} else { \
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(s)[(i)++]=(uint8_t)(((c)>>18)|0xf0); \
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(s)[(i)++]=(uint8_t)((((c)>>12)&0x3f)|0x80); \
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} \
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(s)[(i)++]=(uint8_t)((((c)>>6)&0x3f)|0x80); \
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} \
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(s)[(i)++]=(uint8_t)(((c)&0x3f)|0x80); \
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} \
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}
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#define UTF8_FWD_1_UNSAFE(s, i) { \
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(i)+=1+UTF8_COUNT_TRAIL_BYTES((s)[i]); \
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}
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#define UTF8_FWD_N_UNSAFE(s, i, n) { \
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int32_t __N=(n); \
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while(__N>0) { \
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UTF8_FWD_1_UNSAFE(s, i); \
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--__N; \
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} \
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}
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#define UTF8_SET_CHAR_START_UNSAFE(s, i) { \
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while(UTF8_IS_TRAIL((s)[i])) { --(i); } \
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}
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#define UTF8_NEXT_CHAR_SAFE(s, i, length, c, strict) { \
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(c)=(s)[(i)++]; \
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if((c)>=0x80) { \
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if(UTF8_IS_LEAD(c)) { \
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(c)=utf8_nextCharSafeBody(s, &(i), (int32_t)(length), c, strict); \
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} else { \
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(c)=UTF8_ERROR_VALUE_1; \
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} \
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} \
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}
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#define UTF8_APPEND_CHAR_SAFE(s, i, length, c) { \
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if((uint32_t)(c)<=0x7f) { \
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(s)[(i)++]=(uint8_t)(c); \
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} else { \
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(i)=utf8_appendCharSafeBody(s, (int32_t)(i), (int32_t)(length), c); \
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} \
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}
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#define UTF8_FWD_1_SAFE(s, i, length) { \
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uint8_t __b=(s)[(i)++]; \
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if(UTF8_IS_LEAD(__b)) { \
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uint8_t __count=UTF8_COUNT_TRAIL_BYTES(__b); \
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if((i)+__count>(length)) { \
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__count=(uint8_t)((length)-(i)); \
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} \
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while(__count>0 && UTF8_IS_TRAIL((s)[i])) { \
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++(i); \
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--__count; \
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} \
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} \
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}
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#define UTF8_FWD_N_SAFE(s, i, length, n) { \
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int32_t __N=(n); \
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while(__N>0 && (i)<(length)) { \
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UTF8_FWD_1_SAFE(s, i, length); \
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--__N; \
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} \
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}
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#define UTF8_SET_CHAR_START_SAFE(s, start, i) { \
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if(UTF8_IS_TRAIL((s)[(i)])) { \
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(i)=utf8_back1SafeBody(s, start, (int32_t)(i)); \
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} \
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}
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#define UTF8_PREV_CHAR_UNSAFE(s, i, c) { \
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(c)=(s)[--(i)]; \
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if(UTF8_IS_TRAIL(c)) { \
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uint8_t __b, __count=1, __shift=6; \
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\
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\
00259 (c)&=0x3f; \
00260 for(;;) { \
00261 __b=(s)[--(i)]; \
00262 if(__b>=0xc0) { \
00263 UTF8_MASK_LEAD_BYTE(__b, __count); \
00264 (c)|=(UChar32)__b<<__shift; \
00265 break; \
00266 } else { \
00267 (c)|=(UChar32)(__b&0x3f)<<__shift; \
00268 ++__count; \
00269 __shift+=6; \
00270 } \
00271 } \
00272 } \
00273 }
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#define UTF8_BACK_1_UNSAFE(s, i) { \
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while(UTF8_IS_TRAIL((s)[--(i)])) {} \
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}
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#define UTF8_BACK_N_UNSAFE(s, i, n) { \
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int32_t __N=(n); \
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while(__N>0) { \
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UTF8_BACK_1_UNSAFE(s, i); \
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--__N; \
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} \
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}
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#define UTF8_SET_CHAR_LIMIT_UNSAFE(s, i) { \
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UTF8_BACK_1_UNSAFE(s, i); \
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UTF8_FWD_1_UNSAFE(s, i); \
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}
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#define UTF8_PREV_CHAR_SAFE(s, start, i, c, strict) { \
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(c)=(s)[--(i)]; \
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if((c)>=0x80) { \
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if((c)<=0xbf) { \
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(c)=utf8_prevCharSafeBody(s, start, &(i), c, strict); \
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} else { \
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(c)=UTF8_ERROR_VALUE_1; \
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} \
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} \
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}
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#define UTF8_BACK_1_SAFE(s, start, i) { \
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if(UTF8_IS_TRAIL((s)[--(i)])) { \
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(i)=utf8_back1SafeBody(s, start, (int32_t)(i)); \
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} \
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}
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#define UTF8_BACK_N_SAFE(s, start, i, n) { \
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int32_t __N=(n); \
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while(__N>0 && (i)>(start)) { \
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UTF8_BACK_1_SAFE(s, start, i); \
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--__N; \
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} \
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}
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#define UTF8_SET_CHAR_LIMIT_SAFE(s, start, i, length) { \
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if((start)<(i) && (i)<(length)) { \
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UTF8_BACK_1_SAFE(s, start, i); \
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UTF8_FWD_1_SAFE(s, i, length); \
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} \
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}
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#endif
Generated on Wed Aug 18 05:18:14 2004 for ICU 2.1 by
1.3.7