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00034 #ifndef __UTF16_H__
00035 #define __UTF16_H__
00036
00037
00038 #ifndef __UTF_H__
00039 # include "unicode/utf.h"
00040 #endif
00041
00042
00043
00050 #define U16_IS_SINGLE(c) !U_IS_SURROGATE(c)
00051
00058 #define U16_IS_LEAD(c) (((c)&0xfffffc00)==0xd800)
00059
00066 #define U16_IS_TRAIL(c) (((c)&0xfffffc00)==0xdc00)
00067
00074 #define U16_IS_SURROGATE(c) U_IS_SURROGATE(c)
00075
00083 #define U16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0)
00084
00089 #define U16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000)
00090
00102 #define U16_GET_SUPPLEMENTARY(lead, trail) \
00103 (((UChar32)(lead)<<10UL)+(UChar32)(trail)-U16_SURROGATE_OFFSET)
00104
00105
00113 #define U16_LEAD(supplementary) (UChar)(((supplementary)>>10)+0xd7c0)
00114
00122 #define U16_TRAIL(supplementary) (UChar)(((supplementary)&0x3ff)|0xdc00)
00123
00131 #define U16_LENGTH(c) ((uint32_t)(c)<=0xffff ? 1 : 2)
00132
00138 #define U16_MAX_LENGTH 2
00139
00157 #define U16_GET_UNSAFE(s, i, c) { \
00158 (c)=(s)[i]; \
00159 if(U16_IS_SURROGATE(c)) { \
00160 if(U16_IS_SURROGATE_LEAD(c)) { \
00161 (c)=U16_GET_SUPPLEMENTARY((c), (s)[(i)+1]); \
00162 } else { \
00163 (c)=U16_GET_SUPPLEMENTARY((s)[(i)-1], (c)); \
00164 } \
00165 } \
00166 }
00167
00188 #define U16_GET(s, start, i, length, c) { \
00189 (c)=(s)[i]; \
00190 if(U16_IS_SURROGATE(c)) { \
00191 uint16_t __c2; \
00192 if(U16_IS_SURROGATE_LEAD(c)) { \
00193 if((i)+1<(length) && U16_IS_TRAIL(__c2=(s)[(i)+1])) { \
00194 (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
00195 } \
00196 } else { \
00197 if((i)-1>=(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
00198 (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
00199 } \
00200 } \
00201 } \
00202 }
00203
00204
00205
00225 #define U16_NEXT_UNSAFE(s, i, c) { \
00226 (c)=(s)[(i)++]; \
00227 if(U16_IS_LEAD(c)) { \
00228 (c)=U16_GET_SUPPLEMENTARY((c), (s)[(i)++]); \
00229 } \
00230 }
00231
00252 #define U16_NEXT(s, i, length, c) { \
00253 (c)=(s)[(i)++]; \
00254 if(U16_IS_LEAD(c)) { \
00255 uint16_t __c2; \
00256 if((i)<(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \
00257 ++(i); \
00258 (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
00259 } \
00260 } \
00261 }
00262
00276 #define U16_APPEND_UNSAFE(s, i, c) { \
00277 if((uint32_t)(c)<=0xffff) { \
00278 (s)[(i)++]=(uint16_t)(c); \
00279 } else { \
00280 (s)[(i)++]=(uint16_t)(((c)>>10)+0xd7c0); \
00281 (s)[(i)++]=(uint16_t)(((c)&0x3ff)|0xdc00); \
00282 } \
00283 }
00284
00302 #define U16_APPEND(s, i, capacity, c, isError) { \
00303 if((uint32_t)(c)<=0xffff) { \
00304 (s)[(i)++]=(uint16_t)(c); \
00305 } else if((uint32_t)(c)<=0x10ffff && (i)+1<(capacity)) { \
00306 (s)[(i)++]=(uint16_t)(((c)>>10)+0xd7c0); \
00307 (s)[(i)++]=(uint16_t)(((c)&0x3ff)|0xdc00); \
00308 } else { \
00309 (isError)=TRUE; \
00310 } \
00311 }
00312
00323 #define U16_FWD_1_UNSAFE(s, i) { \
00324 if(U16_IS_LEAD((s)[(i)++])) { \
00325 ++(i); \
00326 } \
00327 }
00328
00340 #define U16_FWD_1(s, i, length) { \
00341 if(U16_IS_LEAD((s)[(i)++]) && (i)<(length) && U16_IS_TRAIL((s)[i])) { \
00342 ++(i); \
00343 } \
00344 }
00345
00358 #define U16_FWD_N_UNSAFE(s, i, n) { \
00359 int32_t __N=(n); \
00360 while(__N>0) { \
00361 U16_FWD_1_UNSAFE(s, i); \
00362 --__N; \
00363 } \
00364 }
00365
00379 #define U16_FWD_N(s, i, length, n) { \
00380 int32_t __N=(n); \
00381 while(__N>0 && (i)<(length)) { \
00382 U16_FWD_1(s, i, length); \
00383 --__N; \
00384 } \
00385 }
00386
00400 #define U16_SET_CP_START_UNSAFE(s, i) { \
00401 if(U16_IS_TRAIL((s)[i])) { \
00402 --(i); \
00403 } \
00404 }
00405
00420 #define U16_SET_CP_START(s, start, i) { \
00421 if(U16_IS_TRAIL((s)[i]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \
00422 --(i); \
00423 } \
00424 }
00425
00426
00427
00448 #define U16_PREV_UNSAFE(s, i, c) { \
00449 (c)=(s)[--(i)]; \
00450 if(U16_IS_TRAIL(c)) { \
00451 (c)=U16_GET_SUPPLEMENTARY((s)[--(i)], (c)); \
00452 } \
00453 }
00454
00476 #define U16_PREV(s, start, i, c) { \
00477 (c)=(s)[--(i)]; \
00478 if(U16_IS_TRAIL(c)) { \
00479 uint16_t __c2; \
00480 if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
00481 --(i); \
00482 (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
00483 } \
00484 } \
00485 }
00486
00498 #define U16_BACK_1_UNSAFE(s, i) { \
00499 if(U16_IS_TRAIL((s)[--(i)])) { \
00500 --(i); \
00501 } \
00502 }
00503
00516 #define U16_BACK_1(s, start, i) { \
00517 if(U16_IS_TRAIL((s)[--(i)]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \
00518 --(i); \
00519 } \
00520 }
00521
00535 #define U16_BACK_N_UNSAFE(s, i, n) { \
00536 int32_t __N=(n); \
00537 while(__N>0) { \
00538 U16_BACK_1_UNSAFE(s, i); \
00539 --__N; \
00540 } \
00541 }
00542
00557 #define U16_BACK_N(s, start, i, n) { \
00558 int32_t __N=(n); \
00559 while(__N>0 && (i)>(start)) { \
00560 U16_BACK_1(s, start, i); \
00561 --__N; \
00562 } \
00563 }
00564
00578 #define U16_SET_CP_LIMIT_UNSAFE(s, i) { \
00579 if(U16_IS_LEAD((s)[(i)-1])) { \
00580 ++(i); \
00581 } \
00582 }
00583
00599 #define U16_SET_CP_LIMIT(s, start, i, length) { \
00600 if((start)<(i) && (i)<(length) && U16_IS_LEAD((s)[(i)-1]) && U16_IS_TRAIL((s)[i])) { \
00601 ++(i); \
00602 } \
00603 }
00604
00605 #endif