utf8.h
Go to the documentation of this file.00001
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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_INTERNAL const uint8_t
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#elif defined(U_STATIC_IMPLEMENTATION)
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U_CFUNC const uint8_t
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#else
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U_CFUNC U_IMPORT const uint8_t
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#endif
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utf8_countTrailBytes[256];
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#define U8_COUNT_TRAIL_BYTES(leadByte) (utf8_countTrailBytes[(uint8_t)leadByte])
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#define U8_MASK_LEAD_BYTE(leadByte, countTrailBytes) ((leadByte)&=(1<<(6-(countTrailBytes)))-1)
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00076 U_INTERNAL UChar32 U_EXPORT2
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utf8_nextCharSafeBody(
const uint8_t *s, int32_t *pi, int32_t length, UChar32 c, UBool strict);
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U_INTERNAL int32_t U_EXPORT2
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utf8_appendCharSafeBody(uint8_t *s, int32_t i, int32_t length, UChar32 c, UBool *pIsError);
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U_INTERNAL UChar32 U_EXPORT2
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utf8_prevCharSafeBody(
const uint8_t *s, int32_t start, int32_t *pi, UChar32 c, UBool strict);
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U_INTERNAL int32_t U_EXPORT2
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utf8_back1SafeBody(
const uint8_t *s, int32_t start, int32_t i);
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#define U8_IS_SINGLE(c) (((c)&0x80)==0)
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#define U8_IS_LEAD(c) ((uint8_t)((c)-0xc0)<0x3e)
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#define U8_IS_TRAIL(c) (((c)&0xc0)==0x80)
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#define U8_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)<=0xd7ff ? 3 : \
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((uint32_t)(c)<=0xdfff || (uint32_t)(c)>0x10ffff ? 0 : \
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((uint32_t)(c)<=0xffff ? 3 : 4)\
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) \
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) \
00141 ) \
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)
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#define U8_MAX_LENGTH 4
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#define U8_GET_UNSAFE(s, i, c) { \
00168 int32_t __I=(int32_t)(i); \
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U8_SET_CP_START_UNSAFE(s, __I); \
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U8_NEXT_UNSAFE(s, __I, c); \
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}
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#define U8_GET(s, start, i, length, c) { \
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int32_t __I=(int32_t)(i); \
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U8_SET_CP_START(s, start, __I); \
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U8_NEXT(s, __I, length, c); \
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}
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#define U8_NEXT_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=U8_COUNT_TRAIL_BYTES(c); \
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U8_MASK_LEAD_BYTE(c, __count); \
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switch(__count) { \
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\
00223 case 3: \
00224 (c)=((c)<<6)|((s)[(i)++]&0x3f); \
00225 case 2: \
00226 (c)=((c)<<6)|((s)[(i)++]&0x3f); \
00227 case 1: \
00228 (c)=((c)<<6)|((s)[(i)++]&0x3f); \
00229 \
00230 break; \
00231 } \
00232 } \
00233 }
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#define U8_NEXT(s, i, length, c) { \
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(c)=(s)[(i)++]; \
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if(((uint8_t)(c))>=0x80) { \
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if(U8_IS_LEAD(c)) { \
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(c)=utf8_nextCharSafeBody((const uint8_t *)s, &(i), (int32_t)(length), c, -1); \
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} else { \
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(c)=U_SENTINEL; \
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} \
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} \
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}
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#define U8_APPEND_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 U8_APPEND(s, i, length, c, isError) { \
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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, &(isError)); \
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} \
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}
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#define U8_FWD_1_UNSAFE(s, i) { \
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(i)+=1+U8_COUNT_TRAIL_BYTES((s)[i]); \
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}
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#define U8_FWD_1(s, i, length) { \
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uint8_t __b=(s)[(i)++]; \
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if(U8_IS_LEAD(__b)) { \
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uint8_t __count=U8_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 && U8_IS_TRAIL((s)[i])) { \
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++(i); \
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--__count; \
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} \
00357 } \
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}
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#define U8_FWD_N_UNSAFE(s, i, n) { \
00373 int32_t __N=(n); \
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while(__N>0) { \
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U8_FWD_1_UNSAFE(s, i); \
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--__N; \
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} \
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}
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#define U8_FWD_N(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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U8_FWD_1(s, i, length); \
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--__N; \
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} \
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}
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#define U8_SET_CP_START_UNSAFE(s, i) { \
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while(U8_IS_TRAIL((s)[i])) { --(i); } \
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}
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#define U8_SET_CP_START(s, start, i) { \
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if(U8_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 U8_PREV_UNSAFE(s, i, c) { \
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(c)=(s)[--(i)]; \
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if(U8_IS_TRAIL(c)) { \
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uint8_t __b, __count=1, __shift=6; \
00463 \
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\
00465 (c)&=0x3f; \
00466 for(;;) { \
00467 __b=(s)[--(i)]; \
00468 if(__b>=0xc0) { \
00469 U8_MASK_LEAD_BYTE(__b, __count); \
00470 (c)|=(UChar32)__b<<__shift; \
00471 break; \
00472 } else { \
00473 (c)|=(UChar32)(__b&0x3f)<<__shift; \
00474 ++__count; \
00475 __shift+=6; \
00476 } \
00477 } \
00478 } \
00479 }
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#define U8_PREV(s, start, i, c) { \
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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, -1); \
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} else { \
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(c)=U_SENTINEL; \
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} \
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} \
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}
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#define U8_BACK_1_UNSAFE(s, i) { \
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while(U8_IS_TRAIL((s)[--(i)])) {} \
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}
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#define U8_BACK_1(s, start, i) { \
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if(U8_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 U8_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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U8_BACK_1_UNSAFE(s, i); \
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--__N; \
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} \
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}
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#define U8_BACK_N(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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U8_BACK_1(s, start, i); \
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--__N; \
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} \
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}
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#define U8_SET_CP_LIMIT_UNSAFE(s, i) { \
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U8_BACK_1_UNSAFE(s, i); \
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U8_FWD_1_UNSAFE(s, i); \
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}
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#define U8_SET_CP_LIMIT(s, start, i, length) { \
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if((start)<(i) && (i)<(length)) { \
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U8_BACK_1(s, start, i); \
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U8_FWD_1(s, i, length); \
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} \
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}
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#endif
Generated on Fri Jun 18 12:36:03 2004 for ICU by
1.3.7