ICU 4.8.1.1
4.8.1.1
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00001 /* 00002 ******************************************************************************* 00003 * 00004 * Copyright (C) 1999-2010, International Business Machines 00005 * Corporation and others. All Rights Reserved. 00006 * 00007 ******************************************************************************* 00008 * file name: utf16.h 00009 * encoding: US-ASCII 00010 * tab size: 8 (not used) 00011 * indentation:4 00012 * 00013 * created on: 1999sep09 00014 * created by: Markus W. Scherer 00015 */ 00016 00034 #ifndef __UTF16_H__ 00035 #define __UTF16_H__ 00036 00037 /* utf.h must be included first. */ 00038 #ifndef __UTF_H__ 00039 # include "unicode/utf.h" 00040 #endif 00041 00042 /* single-code point definitions -------------------------------------------- */ 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 00092 #define U16_IS_SURROGATE_TRAIL(c) (((c)&0x400)!=0) 00093 00098 #define U16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000) 00099 00111 #define U16_GET_SUPPLEMENTARY(lead, trail) \ 00112 (((UChar32)(lead)<<10UL)+(UChar32)(trail)-U16_SURROGATE_OFFSET) 00113 00114 00122 #define U16_LEAD(supplementary) (UChar)(((supplementary)>>10)+0xd7c0) 00123 00131 #define U16_TRAIL(supplementary) (UChar)(((supplementary)&0x3ff)|0xdc00) 00132 00140 #define U16_LENGTH(c) ((uint32_t)(c)<=0xffff ? 1 : 2) 00141 00147 #define U16_MAX_LENGTH 2 00148 00166 #define U16_GET_UNSAFE(s, i, c) { \ 00167 (c)=(s)[i]; \ 00168 if(U16_IS_SURROGATE(c)) { \ 00169 if(U16_IS_SURROGATE_LEAD(c)) { \ 00170 (c)=U16_GET_SUPPLEMENTARY((c), (s)[(i)+1]); \ 00171 } else { \ 00172 (c)=U16_GET_SUPPLEMENTARY((s)[(i)-1], (c)); \ 00173 } \ 00174 } \ 00175 } 00176 00197 #define U16_GET(s, start, i, length, c) { \ 00198 (c)=(s)[i]; \ 00199 if(U16_IS_SURROGATE(c)) { \ 00200 uint16_t __c2; \ 00201 if(U16_IS_SURROGATE_LEAD(c)) { \ 00202 if((i)+1<(length) && U16_IS_TRAIL(__c2=(s)[(i)+1])) { \ 00203 (c)=U16_GET_SUPPLEMENTARY((c), __c2); \ 00204 } \ 00205 } else { \ 00206 if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \ 00207 (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \ 00208 } \ 00209 } \ 00210 } \ 00211 } 00212 00213 /* definitions with forward iteration --------------------------------------- */ 00214 00234 #define U16_NEXT_UNSAFE(s, i, c) { \ 00235 (c)=(s)[(i)++]; \ 00236 if(U16_IS_LEAD(c)) { \ 00237 (c)=U16_GET_SUPPLEMENTARY((c), (s)[(i)++]); \ 00238 } \ 00239 } 00240 00261 #define U16_NEXT(s, i, length, c) { \ 00262 (c)=(s)[(i)++]; \ 00263 if(U16_IS_LEAD(c)) { \ 00264 uint16_t __c2; \ 00265 if((i)<(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \ 00266 ++(i); \ 00267 (c)=U16_GET_SUPPLEMENTARY((c), __c2); \ 00268 } \ 00269 } \ 00270 } 00271 00285 #define U16_APPEND_UNSAFE(s, i, c) { \ 00286 if((uint32_t)(c)<=0xffff) { \ 00287 (s)[(i)++]=(uint16_t)(c); \ 00288 } else { \ 00289 (s)[(i)++]=(uint16_t)(((c)>>10)+0xd7c0); \ 00290 (s)[(i)++]=(uint16_t)(((c)&0x3ff)|0xdc00); \ 00291 } \ 00292 } 00293 00311 #define U16_APPEND(s, i, capacity, c, isError) { \ 00312 if((uint32_t)(c)<=0xffff) { \ 00313 (s)[(i)++]=(uint16_t)(c); \ 00314 } else if((uint32_t)(c)<=0x10ffff && (i)+1<(capacity)) { \ 00315 (s)[(i)++]=(uint16_t)(((c)>>10)+0xd7c0); \ 00316 (s)[(i)++]=(uint16_t)(((c)&0x3ff)|0xdc00); \ 00317 } else /* c>0x10ffff or not enough space */ { \ 00318 (isError)=TRUE; \ 00319 } \ 00320 } 00321 00332 #define U16_FWD_1_UNSAFE(s, i) { \ 00333 if(U16_IS_LEAD((s)[(i)++])) { \ 00334 ++(i); \ 00335 } \ 00336 } 00337 00349 #define U16_FWD_1(s, i, length) { \ 00350 if(U16_IS_LEAD((s)[(i)++]) && (i)<(length) && U16_IS_TRAIL((s)[i])) { \ 00351 ++(i); \ 00352 } \ 00353 } 00354 00367 #define U16_FWD_N_UNSAFE(s, i, n) { \ 00368 int32_t __N=(n); \ 00369 while(__N>0) { \ 00370 U16_FWD_1_UNSAFE(s, i); \ 00371 --__N; \ 00372 } \ 00373 } 00374 00388 #define U16_FWD_N(s, i, length, n) { \ 00389 int32_t __N=(n); \ 00390 while(__N>0 && (i)<(length)) { \ 00391 U16_FWD_1(s, i, length); \ 00392 --__N; \ 00393 } \ 00394 } 00395 00409 #define U16_SET_CP_START_UNSAFE(s, i) { \ 00410 if(U16_IS_TRAIL((s)[i])) { \ 00411 --(i); \ 00412 } \ 00413 } 00414 00429 #define U16_SET_CP_START(s, start, i) { \ 00430 if(U16_IS_TRAIL((s)[i]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \ 00431 --(i); \ 00432 } \ 00433 } 00434 00435 /* definitions with backward iteration -------------------------------------- */ 00436 00457 #define U16_PREV_UNSAFE(s, i, c) { \ 00458 (c)=(s)[--(i)]; \ 00459 if(U16_IS_TRAIL(c)) { \ 00460 (c)=U16_GET_SUPPLEMENTARY((s)[--(i)], (c)); \ 00461 } \ 00462 } 00463 00485 #define U16_PREV(s, start, i, c) { \ 00486 (c)=(s)[--(i)]; \ 00487 if(U16_IS_TRAIL(c)) { \ 00488 uint16_t __c2; \ 00489 if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \ 00490 --(i); \ 00491 (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \ 00492 } \ 00493 } \ 00494 } 00495 00507 #define U16_BACK_1_UNSAFE(s, i) { \ 00508 if(U16_IS_TRAIL((s)[--(i)])) { \ 00509 --(i); \ 00510 } \ 00511 } 00512 00525 #define U16_BACK_1(s, start, i) { \ 00526 if(U16_IS_TRAIL((s)[--(i)]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \ 00527 --(i); \ 00528 } \ 00529 } 00530 00544 #define U16_BACK_N_UNSAFE(s, i, n) { \ 00545 int32_t __N=(n); \ 00546 while(__N>0) { \ 00547 U16_BACK_1_UNSAFE(s, i); \ 00548 --__N; \ 00549 } \ 00550 } 00551 00566 #define U16_BACK_N(s, start, i, n) { \ 00567 int32_t __N=(n); \ 00568 while(__N>0 && (i)>(start)) { \ 00569 U16_BACK_1(s, start, i); \ 00570 --__N; \ 00571 } \ 00572 } 00573 00587 #define U16_SET_CP_LIMIT_UNSAFE(s, i) { \ 00588 if(U16_IS_LEAD((s)[(i)-1])) { \ 00589 ++(i); \ 00590 } \ 00591 } 00592 00608 #define U16_SET_CP_LIMIT(s, start, i, length) { \ 00609 if((start)<(i) && (i)<(length) && U16_IS_LEAD((s)[(i)-1]) && U16_IS_TRAIL((s)[i])) { \ 00610 ++(i); \ 00611 } \ 00612 } 00613 00614 #endif