Go to the documentation of this file.
55 #define U8_COUNT_TRAIL_BYTES(leadByte) \
56 (U8_IS_LEAD(leadByte) ? \
57 ((uint8_t)(leadByte)>=0xe0)+((uint8_t)(leadByte)>=0xf0)+1 : 0)
70 #define U8_COUNT_TRAIL_BYTES_UNSAFE(leadByte) \
71 (((uint8_t)(leadByte)>=0xc2)+((uint8_t)(leadByte)>=0xe0)+((uint8_t)(leadByte)>=0xf0))
80 #define U8_MASK_LEAD_BYTE(leadByte, countTrailBytes) ((leadByte)&=(1<<(6-(countTrailBytes)))-1)
90 #define U8_LEAD3_T1_BITS "\x20\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x10\x30\x30"
97 #define U8_IS_VALID_LEAD3_AND_T1(lead, t1) (U8_LEAD3_T1_BITS[(lead)&0xf]&(1<<((uint8_t)(t1)>>5)))
107 #define U8_LEAD4_T1_BITS "\x00\x00\x00\x00\x00\x00\x00\x00\x1E\x0F\x0F\x0F\x00\x00\x00\x00"
114 #define U8_IS_VALID_LEAD4_AND_T1(lead, t1) (U8_LEAD4_T1_BITS[(uint8_t)(t1)>>4]&(1<<((lead)&7)))
172 #define U8_IS_SINGLE(c) (((c)&0x80)==0)
180 #define U8_IS_LEAD(c) ((uint8_t)((c)-0xc2)<=0x32)
189 #define U8_IS_TRAIL(c) ((int8_t)(c)<-0x40)
198 #define U8_LENGTH(c) \
199 ((uint32_t)(c)<=0x7f ? 1 : \
200 ((uint32_t)(c)<=0x7ff ? 2 : \
201 ((uint32_t)(c)<=0xd7ff ? 3 : \
202 ((uint32_t)(c)<=0xdfff || (uint32_t)(c)>0x10ffff ? 0 : \
203 ((uint32_t)(c)<=0xffff ? 3 : 4)\
214 #define U8_MAX_LENGTH 4
232 #define U8_GET_UNSAFE(s, i, c) { \
233 int32_t _u8_get_unsafe_index=(int32_t)(i); \
234 U8_SET_CP_START_UNSAFE(s, _u8_get_unsafe_index); \
235 U8_NEXT_UNSAFE(s, _u8_get_unsafe_index, c); \
259 #define U8_GET(s, start, i, length, c) { \
260 int32_t _u8_get_index=(i); \
261 U8_SET_CP_START(s, start, _u8_get_index); \
262 U8_NEXT(s, _u8_get_index, length, c); \
290 #define U8_GET_OR_FFFD(s, start, i, length, c) { \
291 int32_t _u8_get_index=(i); \
292 U8_SET_CP_START(s, start, _u8_get_index); \
293 U8_NEXT_OR_FFFD(s, _u8_get_index, length, c); \
315 #define U8_NEXT_UNSAFE(s, i, c) { \
316 (c)=(uint8_t)(s)[(i)++]; \
317 if(!U8_IS_SINGLE(c)) { \
319 (c)=(((c)&0x1f)<<6)|((s)[(i)++]&0x3f); \
320 } else if((c)<0xf0) { \
322 (c)=(UChar)(((c)<<12)|(((s)[i]&0x3f)<<6)|((s)[(i)+1]&0x3f)); \
325 (c)=(((c)&7)<<18)|(((s)[i]&0x3f)<<12)|(((s)[(i)+1]&0x3f)<<6)|((s)[(i)+2]&0x3f); \
351 #define U8_NEXT(s, i, length, c) U8_INTERNAL_NEXT_OR_SUB(s, i, length, c, U_SENTINEL)
377 #define U8_NEXT_OR_FFFD(s, i, length, c) U8_INTERNAL_NEXT_OR_SUB(s, i, length, c, 0xfffd)
380 #define U8_INTERNAL_NEXT_OR_SUB(s, i, length, c, sub) { \
381 (c)=(uint8_t)(s)[(i)++]; \
382 if(!U8_IS_SINGLE(c)) { \
384 if((i)!=(length) && \
388 U8_LEAD3_T1_BITS[(c)&=0xf]&(1<<((__t=(s)[i])>>5)) && \
392 U8_LEAD4_T1_BITS[(__t=(s)[i])>>4]&(1<<(c)) && \
393 ((c)=((c)<<6)|(__t&0x3f), ++(i)!=(length)) && \
394 (__t=(s)[i]-0x80)<=0x3f) && \
396 ((c)=((c)<<6)|__t, ++(i)!=(length)) \
398 (c)>=0xc2 && ((c)&=0x1f, 1)) && \
400 (__t=(s)[i]-0x80)<=0x3f && \
401 ((c)=((c)<<6)|__t, ++(i), 1)) { \
421 #define U8_APPEND_UNSAFE(s, i, c) { \
424 (s)[(i)++]=(uint8_t)__uc; \
427 (s)[(i)++]=(uint8_t)((__uc>>6)|0xc0); \
430 (s)[(i)++]=(uint8_t)((__uc>>12)|0xe0); \
432 (s)[(i)++]=(uint8_t)((__uc>>18)|0xf0); \
433 (s)[(i)++]=(uint8_t)(((__uc>>12)&0x3f)|0x80); \
435 (s)[(i)++]=(uint8_t)(((__uc>>6)&0x3f)|0x80); \
437 (s)[(i)++]=(uint8_t)((__uc&0x3f)|0x80); \
458 #define U8_APPEND(s, i, capacity, c, isError) { \
461 (s)[(i)++]=(uint8_t)__uc; \
462 } else if(__uc<=0x7ff && (i)+1<(capacity)) { \
463 (s)[(i)++]=(uint8_t)((__uc>>6)|0xc0); \
464 (s)[(i)++]=(uint8_t)((__uc&0x3f)|0x80); \
465 } else if((__uc<=0xd7ff || (0xe000<=__uc && __uc<=0xffff)) && (i)+2<(capacity)) { \
466 (s)[(i)++]=(uint8_t)((__uc>>12)|0xe0); \
467 (s)[(i)++]=(uint8_t)(((__uc>>6)&0x3f)|0x80); \
468 (s)[(i)++]=(uint8_t)((__uc&0x3f)|0x80); \
469 } else if(0xffff<__uc && __uc<=0x10ffff && (i)+3<(capacity)) { \
470 (s)[(i)++]=(uint8_t)((__uc>>18)|0xf0); \
471 (s)[(i)++]=(uint8_t)(((__uc>>12)&0x3f)|0x80); \
472 (s)[(i)++]=(uint8_t)(((__uc>>6)&0x3f)|0x80); \
473 (s)[(i)++]=(uint8_t)((__uc&0x3f)|0x80); \
489 #define U8_FWD_1_UNSAFE(s, i) { \
490 (i)+=1+U8_COUNT_TRAIL_BYTES_UNSAFE((s)[i]); \
506 #define U8_FWD_1(s, i, length) { \
507 uint8_t __b=(s)[(i)++]; \
508 if(U8_IS_LEAD(__b) && (i)!=(length)) { \
509 uint8_t __t1=(s)[i]; \
510 if((0xe0<=__b && __b<0xf0)) { \
511 if(U8_IS_VALID_LEAD3_AND_T1(__b, __t1) && \
512 ++(i)!=(length) && U8_IS_TRAIL((s)[i])) { \
515 } else if(__b<0xe0) { \
516 if(U8_IS_TRAIL(__t1)) { \
520 if(U8_IS_VALID_LEAD4_AND_T1(__b, __t1) && \
521 ++(i)!=(length) && U8_IS_TRAIL((s)[i]) && \
522 ++(i)!=(length) && U8_IS_TRAIL((s)[i])) { \
541 #define U8_FWD_N_UNSAFE(s, i, n) { \
544 U8_FWD_1_UNSAFE(s, i); \
564 #define U8_FWD_N(s, i, length, n) { \
566 while(__N>0 && ((i)<(length) || ((length)<0 && (s)[i]!=0))) { \
567 U8_FWD_1(s, i, length); \
585 #define U8_SET_CP_START_UNSAFE(s, i) { \
586 while(U8_IS_TRAIL((s)[i])) { --(i); } \
606 #define U8_SET_CP_START(s, start, i) { \
607 if(U8_IS_TRAIL((s)[(i)])) { \
608 (i)=utf8_back1SafeBody(s, start, (i)); \
612 #ifndef U_HIDE_DRAFT_API
639 #define U8_TRUNCATE_IF_INCOMPLETE(s, start, length) \
640 if((length)>(start)) { \
641 uint8_t __b1=s[(length)-1]; \
642 if(U8_IS_SINGLE(__b1)) { \
644 } else if(U8_IS_LEAD(__b1)) { \
646 } else if(U8_IS_TRAIL(__b1) && ((length)-2)>=(start)) { \
647 uint8_t __b2=s[(length)-2]; \
648 if(0xe0<=__b2 && __b2<=0xf4) { \
649 if(__b2<0xf0 ? U8_IS_VALID_LEAD3_AND_T1(__b2, __b1) : \
650 U8_IS_VALID_LEAD4_AND_T1(__b2, __b1)) { \
653 } else if(U8_IS_TRAIL(__b2) && ((length)-3)>=(start)) { \
654 uint8_t __b3=s[(length)-3]; \
655 if(0xf0<=__b3 && __b3<=0xf4 && U8_IS_VALID_LEAD4_AND_T1(__b3, __b2)) { \
661 #endif // U_HIDE_DRAFT_API
684 #define U8_PREV_UNSAFE(s, i, c) { \
685 (c)=(uint8_t)(s)[--(i)]; \
686 if(U8_IS_TRAIL(c)) { \
687 uint8_t __b, __count=1, __shift=6; \
694 U8_MASK_LEAD_BYTE(__b, __count); \
695 (c)|=(UChar32)__b<<__shift; \
698 (c)|=(UChar32)(__b&0x3f)<<__shift; \
726 #define U8_PREV(s, start, i, c) { \
727 (c)=(uint8_t)(s)[--(i)]; \
728 if(!U8_IS_SINGLE(c)) { \
729 (c)=utf8_prevCharSafeBody((const uint8_t *)s, start, &(i), c, -1); \
757 #define U8_PREV_OR_FFFD(s, start, i, c) { \
758 (c)=(uint8_t)(s)[--(i)]; \
759 if(!U8_IS_SINGLE(c)) { \
760 (c)=utf8_prevCharSafeBody((const uint8_t *)s, start, &(i), c, -3); \
775 #define U8_BACK_1_UNSAFE(s, i) { \
776 while(U8_IS_TRAIL((s)[--(i)])) {} \
791 #define U8_BACK_1(s, start, i) { \
792 if(U8_IS_TRAIL((s)[--(i)])) { \
793 (i)=utf8_back1SafeBody(s, start, (i)); \
810 #define U8_BACK_N_UNSAFE(s, i, n) { \
813 U8_BACK_1_UNSAFE(s, i); \
832 #define U8_BACK_N(s, start, i, n) { \
834 while(__N>0 && (i)>(start)) { \
835 U8_BACK_1(s, start, i); \
853 #define U8_SET_CP_LIMIT_UNSAFE(s, i) { \
854 U8_BACK_1_UNSAFE(s, i); \
855 U8_FWD_1_UNSAFE(s, i); \
875 #define U8_SET_CP_LIMIT(s, start, i, length) { \
876 if((start)<(i) && ((i)<(length) || (length)<0)) { \
877 U8_BACK_1(s, start, i); \
878 U8_FWD_1(s, i, length); \
int8_t UBool
The ICU boolean type.
C API: Code point macros.
int32_t UChar32
Define UChar32 as a type for single Unicode code points.
Basic types and constants for UTF.
UChar32 utf8_prevCharSafeBody(const uint8_t *s, int32_t start, int32_t *pi, UChar32 c, UBool strict)
Function for handling "previous code point" with error-checking.
#define U_STABLE
This is used to declare a function as a stable public ICU C API.
int32_t utf8_back1SafeBody(const uint8_t *s, int32_t start, int32_t i)
Function for handling "skip backward one code point" with error-checking.
UChar32 utf8_nextCharSafeBody(const uint8_t *s, int32_t *pi, int32_t length, UChar32 c, UBool strict)
Function for handling "next code point" with error-checking.
int32_t utf8_appendCharSafeBody(uint8_t *s, int32_t i, int32_t length, UChar32 c, UBool *pIsError)
Function for handling "append code point" with error-checking.