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Diffstat (limited to 'deps/node/deps/icu-small/source/common/unicode/utf16.h')
| -rw-r--r-- | deps/node/deps/icu-small/source/common/unicode/utf16.h | 733 |
1 files changed, 0 insertions, 733 deletions
diff --git a/deps/node/deps/icu-small/source/common/unicode/utf16.h b/deps/node/deps/icu-small/source/common/unicode/utf16.h deleted file mode 100644 index 0908b4f0..00000000 --- a/deps/node/deps/icu-small/source/common/unicode/utf16.h +++ /dev/null @@ -1,733 +0,0 @@ -// © 2016 and later: Unicode, Inc. and others. -// License & terms of use: http://www.unicode.org/copyright.html -/* -******************************************************************************* -* -* Copyright (C) 1999-2012, International Business Machines -* Corporation and others. All Rights Reserved. -* -******************************************************************************* -* file name: utf16.h -* encoding: UTF-8 -* tab size: 8 (not used) -* indentation:4 -* -* created on: 1999sep09 -* created by: Markus W. Scherer -*/ - -/** - * \file - * \brief C API: 16-bit Unicode handling macros - * - * This file defines macros to deal with 16-bit Unicode (UTF-16) code units and strings. - * - * For more information see utf.h and the ICU User Guide Strings chapter - * (http://userguide.icu-project.org/strings). - * - * <em>Usage:</em> - * ICU coding guidelines for if() statements should be followed when using these macros. - * Compound statements (curly braces {}) must be used for if-else-while... - * bodies and all macro statements should be terminated with semicolon. - */ - -#ifndef __UTF16_H__ -#define __UTF16_H__ - -#include "unicode/umachine.h" -#ifndef __UTF_H__ -# include "unicode/utf.h" -#endif - -/* single-code point definitions -------------------------------------------- */ - -/** - * Does this code unit alone encode a code point (BMP, not a surrogate)? - * @param c 16-bit code unit - * @return TRUE or FALSE - * @stable ICU 2.4 - */ -#define U16_IS_SINGLE(c) !U_IS_SURROGATE(c) - -/** - * Is this code unit a lead surrogate (U+d800..U+dbff)? - * @param c 16-bit code unit - * @return TRUE or FALSE - * @stable ICU 2.4 - */ -#define U16_IS_LEAD(c) (((c)&0xfffffc00)==0xd800) - -/** - * Is this code unit a trail surrogate (U+dc00..U+dfff)? - * @param c 16-bit code unit - * @return TRUE or FALSE - * @stable ICU 2.4 - */ -#define U16_IS_TRAIL(c) (((c)&0xfffffc00)==0xdc00) - -/** - * Is this code unit a surrogate (U+d800..U+dfff)? - * @param c 16-bit code unit - * @return TRUE or FALSE - * @stable ICU 2.4 - */ -#define U16_IS_SURROGATE(c) U_IS_SURROGATE(c) - -/** - * Assuming c is a surrogate code point (U16_IS_SURROGATE(c)), - * is it a lead surrogate? - * @param c 16-bit code unit - * @return TRUE or FALSE - * @stable ICU 2.4 - */ -#define U16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0) - -/** - * Assuming c is a surrogate code point (U16_IS_SURROGATE(c)), - * is it a trail surrogate? - * @param c 16-bit code unit - * @return TRUE or FALSE - * @stable ICU 4.2 - */ -#define U16_IS_SURROGATE_TRAIL(c) (((c)&0x400)!=0) - -/** - * Helper constant for U16_GET_SUPPLEMENTARY. - * @internal - */ -#define U16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000) - -/** - * Get a supplementary code point value (U+10000..U+10ffff) - * from its lead and trail surrogates. - * The result is undefined if the input values are not - * lead and trail surrogates. - * - * @param lead lead surrogate (U+d800..U+dbff) - * @param trail trail surrogate (U+dc00..U+dfff) - * @return supplementary code point (U+10000..U+10ffff) - * @stable ICU 2.4 - */ -#define U16_GET_SUPPLEMENTARY(lead, trail) \ - (((UChar32)(lead)<<10UL)+(UChar32)(trail)-U16_SURROGATE_OFFSET) - - -/** - * Get the lead surrogate (0xd800..0xdbff) for a - * supplementary code point (0x10000..0x10ffff). - * @param supplementary 32-bit code point (U+10000..U+10ffff) - * @return lead surrogate (U+d800..U+dbff) for supplementary - * @stable ICU 2.4 - */ -#define U16_LEAD(supplementary) (UChar)(((supplementary)>>10)+0xd7c0) - -/** - * Get the trail surrogate (0xdc00..0xdfff) for a - * supplementary code point (0x10000..0x10ffff). - * @param supplementary 32-bit code point (U+10000..U+10ffff) - * @return trail surrogate (U+dc00..U+dfff) for supplementary - * @stable ICU 2.4 - */ -#define U16_TRAIL(supplementary) (UChar)(((supplementary)&0x3ff)|0xdc00) - -/** - * How many 16-bit code units are used to encode this Unicode code point? (1 or 2) - * The result is not defined if c is not a Unicode code point (U+0000..U+10ffff). - * @param c 32-bit code point - * @return 1 or 2 - * @stable ICU 2.4 - */ -#define U16_LENGTH(c) ((uint32_t)(c)<=0xffff ? 1 : 2) - -/** - * The maximum number of 16-bit code units per Unicode code point (U+0000..U+10ffff). - * @return 2 - * @stable ICU 2.4 - */ -#define U16_MAX_LENGTH 2 - -/** - * Get a code point from a string at a random-access offset, - * without changing the offset. - * "Unsafe" macro, assumes well-formed UTF-16. - * - * The offset may point to either the lead or trail surrogate unit - * for a supplementary code point, in which case the macro will read - * the adjacent matching surrogate as well. - * The result is undefined if the offset points to a single, unpaired surrogate. - * Iteration through a string is more efficient with U16_NEXT_UNSAFE or U16_NEXT. - * - * @param s const UChar * string - * @param i string offset - * @param c output UChar32 variable - * @see U16_GET - * @stable ICU 2.4 - */ -#define U16_GET_UNSAFE(s, i, c) { \ - (c)=(s)[i]; \ - if(U16_IS_SURROGATE(c)) { \ - if(U16_IS_SURROGATE_LEAD(c)) { \ - (c)=U16_GET_SUPPLEMENTARY((c), (s)[(i)+1]); \ - } else { \ - (c)=U16_GET_SUPPLEMENTARY((s)[(i)-1], (c)); \ - } \ - } \ -} - -/** - * Get a code point from a string at a random-access offset, - * without changing the offset. - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The offset may point to either the lead or trail surrogate unit - * for a supplementary code point, in which case the macro will read - * the adjacent matching surrogate as well. - * - * The length can be negative for a NUL-terminated string. - * - * If the offset points to a single, unpaired surrogate, then - * c is set to that unpaired surrogate. - * Iteration through a string is more efficient with U16_NEXT_UNSAFE or U16_NEXT. - * - * @param s const UChar * string - * @param start starting string offset (usually 0) - * @param i string offset, must be start<=i<length - * @param length string length - * @param c output UChar32 variable - * @see U16_GET_UNSAFE - * @stable ICU 2.4 - */ -#define U16_GET(s, start, i, length, c) { \ - (c)=(s)[i]; \ - if(U16_IS_SURROGATE(c)) { \ - uint16_t __c2; \ - if(U16_IS_SURROGATE_LEAD(c)) { \ - if((i)+1!=(length) && U16_IS_TRAIL(__c2=(s)[(i)+1])) { \ - (c)=U16_GET_SUPPLEMENTARY((c), __c2); \ - } \ - } else { \ - if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \ - (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \ - } \ - } \ - } \ -} - -/** - * Get a code point from a string at a random-access offset, - * without changing the offset. - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The offset may point to either the lead or trail surrogate unit - * for a supplementary code point, in which case the macro will read - * the adjacent matching surrogate as well. - * - * The length can be negative for a NUL-terminated string. - * - * If the offset points to a single, unpaired surrogate, then - * c is set to U+FFFD. - * Iteration through a string is more efficient with U16_NEXT_UNSAFE or U16_NEXT_OR_FFFD. - * - * @param s const UChar * string - * @param start starting string offset (usually 0) - * @param i string offset, must be start<=i<length - * @param length string length - * @param c output UChar32 variable - * @see U16_GET_UNSAFE - * @stable ICU 60 - */ -#define U16_GET_OR_FFFD(s, start, i, length, c) { \ - (c)=(s)[i]; \ - if(U16_IS_SURROGATE(c)) { \ - uint16_t __c2; \ - if(U16_IS_SURROGATE_LEAD(c)) { \ - if((i)+1!=(length) && U16_IS_TRAIL(__c2=(s)[(i)+1])) { \ - (c)=U16_GET_SUPPLEMENTARY((c), __c2); \ - } else { \ - (c)=0xfffd; \ - } \ - } else { \ - if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \ - (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \ - } else { \ - (c)=0xfffd; \ - } \ - } \ - } \ -} - -/* definitions with forward iteration --------------------------------------- */ - -/** - * Get a code point from a string at a code point boundary offset, - * and advance the offset to the next code point boundary. - * (Post-incrementing forward iteration.) - * "Unsafe" macro, assumes well-formed UTF-16. - * - * The offset may point to the lead surrogate unit - * for a supplementary code point, in which case the macro will read - * the following trail surrogate as well. - * If the offset points to a trail surrogate, then that itself - * will be returned as the code point. - * The result is undefined if the offset points to a single, unpaired lead surrogate. - * - * @param s const UChar * string - * @param i string offset - * @param c output UChar32 variable - * @see U16_NEXT - * @stable ICU 2.4 - */ -#define U16_NEXT_UNSAFE(s, i, c) { \ - (c)=(s)[(i)++]; \ - if(U16_IS_LEAD(c)) { \ - (c)=U16_GET_SUPPLEMENTARY((c), (s)[(i)++]); \ - } \ -} - -/** - * Get a code point from a string at a code point boundary offset, - * and advance the offset to the next code point boundary. - * (Post-incrementing forward iteration.) - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The length can be negative for a NUL-terminated string. - * - * The offset may point to the lead surrogate unit - * for a supplementary code point, in which case the macro will read - * the following trail surrogate as well. - * If the offset points to a trail surrogate or - * to a single, unpaired lead surrogate, then c is set to that unpaired surrogate. - * - * @param s const UChar * string - * @param i string offset, must be i<length - * @param length string length - * @param c output UChar32 variable - * @see U16_NEXT_UNSAFE - * @stable ICU 2.4 - */ -#define U16_NEXT(s, i, length, c) { \ - (c)=(s)[(i)++]; \ - if(U16_IS_LEAD(c)) { \ - uint16_t __c2; \ - if((i)!=(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \ - ++(i); \ - (c)=U16_GET_SUPPLEMENTARY((c), __c2); \ - } \ - } \ -} - -/** - * Get a code point from a string at a code point boundary offset, - * and advance the offset to the next code point boundary. - * (Post-incrementing forward iteration.) - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The length can be negative for a NUL-terminated string. - * - * The offset may point to the lead surrogate unit - * for a supplementary code point, in which case the macro will read - * the following trail surrogate as well. - * If the offset points to a trail surrogate or - * to a single, unpaired lead surrogate, then c is set to U+FFFD. - * - * @param s const UChar * string - * @param i string offset, must be i<length - * @param length string length - * @param c output UChar32 variable - * @see U16_NEXT_UNSAFE - * @stable ICU 60 - */ -#define U16_NEXT_OR_FFFD(s, i, length, c) { \ - (c)=(s)[(i)++]; \ - if(U16_IS_SURROGATE(c)) { \ - uint16_t __c2; \ - if(U16_IS_SURROGATE_LEAD(c) && (i)!=(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \ - ++(i); \ - (c)=U16_GET_SUPPLEMENTARY((c), __c2); \ - } else { \ - (c)=0xfffd; \ - } \ - } \ -} - -/** - * Append a code point to a string, overwriting 1 or 2 code units. - * The offset points to the current end of the string contents - * and is advanced (post-increment). - * "Unsafe" macro, assumes a valid code point and sufficient space in the string. - * Otherwise, the result is undefined. - * - * @param s const UChar * string buffer - * @param i string offset - * @param c code point to append - * @see U16_APPEND - * @stable ICU 2.4 - */ -#define U16_APPEND_UNSAFE(s, i, c) { \ - if((uint32_t)(c)<=0xffff) { \ - (s)[(i)++]=(uint16_t)(c); \ - } else { \ - (s)[(i)++]=(uint16_t)(((c)>>10)+0xd7c0); \ - (s)[(i)++]=(uint16_t)(((c)&0x3ff)|0xdc00); \ - } \ -} - -/** - * Append a code point to a string, overwriting 1 or 2 code units. - * The offset points to the current end of the string contents - * and is advanced (post-increment). - * "Safe" macro, checks for a valid code point. - * If a surrogate pair is written, checks for sufficient space in the string. - * If the code point is not valid or a trail surrogate does not fit, - * then isError is set to TRUE. - * - * @param s const UChar * string buffer - * @param i string offset, must be i<capacity - * @param capacity size of the string buffer - * @param c code point to append - * @param isError output UBool set to TRUE if an error occurs, otherwise not modified - * @see U16_APPEND_UNSAFE - * @stable ICU 2.4 - */ -#define U16_APPEND(s, i, capacity, c, isError) { \ - if((uint32_t)(c)<=0xffff) { \ - (s)[(i)++]=(uint16_t)(c); \ - } else if((uint32_t)(c)<=0x10ffff && (i)+1<(capacity)) { \ - (s)[(i)++]=(uint16_t)(((c)>>10)+0xd7c0); \ - (s)[(i)++]=(uint16_t)(((c)&0x3ff)|0xdc00); \ - } else /* c>0x10ffff or not enough space */ { \ - (isError)=TRUE; \ - } \ -} - -/** - * Advance the string offset from one code point boundary to the next. - * (Post-incrementing iteration.) - * "Unsafe" macro, assumes well-formed UTF-16. - * - * @param s const UChar * string - * @param i string offset - * @see U16_FWD_1 - * @stable ICU 2.4 - */ -#define U16_FWD_1_UNSAFE(s, i) { \ - if(U16_IS_LEAD((s)[(i)++])) { \ - ++(i); \ - } \ -} - -/** - * Advance the string offset from one code point boundary to the next. - * (Post-incrementing iteration.) - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The length can be negative for a NUL-terminated string. - * - * @param s const UChar * string - * @param i string offset, must be i<length - * @param length string length - * @see U16_FWD_1_UNSAFE - * @stable ICU 2.4 - */ -#define U16_FWD_1(s, i, length) { \ - if(U16_IS_LEAD((s)[(i)++]) && (i)!=(length) && U16_IS_TRAIL((s)[i])) { \ - ++(i); \ - } \ -} - -/** - * Advance the string offset from one code point boundary to the n-th next one, - * i.e., move forward by n code points. - * (Post-incrementing iteration.) - * "Unsafe" macro, assumes well-formed UTF-16. - * - * @param s const UChar * string - * @param i string offset - * @param n number of code points to skip - * @see U16_FWD_N - * @stable ICU 2.4 - */ -#define U16_FWD_N_UNSAFE(s, i, n) { \ - int32_t __N=(n); \ - while(__N>0) { \ - U16_FWD_1_UNSAFE(s, i); \ - --__N; \ - } \ -} - -/** - * Advance the string offset from one code point boundary to the n-th next one, - * i.e., move forward by n code points. - * (Post-incrementing iteration.) - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The length can be negative for a NUL-terminated string. - * - * @param s const UChar * string - * @param i int32_t string offset, must be i<length - * @param length int32_t string length - * @param n number of code points to skip - * @see U16_FWD_N_UNSAFE - * @stable ICU 2.4 - */ -#define U16_FWD_N(s, i, length, n) { \ - int32_t __N=(n); \ - while(__N>0 && ((i)<(length) || ((length)<0 && (s)[i]!=0))) { \ - U16_FWD_1(s, i, length); \ - --__N; \ - } \ -} - -/** - * Adjust a random-access offset to a code point boundary - * at the start of a code point. - * If the offset points to the trail surrogate of a surrogate pair, - * then the offset is decremented. - * Otherwise, it is not modified. - * "Unsafe" macro, assumes well-formed UTF-16. - * - * @param s const UChar * string - * @param i string offset - * @see U16_SET_CP_START - * @stable ICU 2.4 - */ -#define U16_SET_CP_START_UNSAFE(s, i) { \ - if(U16_IS_TRAIL((s)[i])) { \ - --(i); \ - } \ -} - -/** - * Adjust a random-access offset to a code point boundary - * at the start of a code point. - * If the offset points to the trail surrogate of a surrogate pair, - * then the offset is decremented. - * Otherwise, it is not modified. - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * @param s const UChar * string - * @param start starting string offset (usually 0) - * @param i string offset, must be start<=i - * @see U16_SET_CP_START_UNSAFE - * @stable ICU 2.4 - */ -#define U16_SET_CP_START(s, start, i) { \ - if(U16_IS_TRAIL((s)[i]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \ - --(i); \ - } \ -} - -/* definitions with backward iteration -------------------------------------- */ - -/** - * Move the string offset from one code point boundary to the previous one - * and get the code point between them. - * (Pre-decrementing backward iteration.) - * "Unsafe" macro, assumes well-formed UTF-16. - * - * The input offset may be the same as the string length. - * If the offset is behind a trail surrogate unit - * for a supplementary code point, then the macro will read - * the preceding lead surrogate as well. - * If the offset is behind a lead surrogate, then that itself - * will be returned as the code point. - * The result is undefined if the offset is behind a single, unpaired trail surrogate. - * - * @param s const UChar * string - * @param i string offset - * @param c output UChar32 variable - * @see U16_PREV - * @stable ICU 2.4 - */ -#define U16_PREV_UNSAFE(s, i, c) { \ - (c)=(s)[--(i)]; \ - if(U16_IS_TRAIL(c)) { \ - (c)=U16_GET_SUPPLEMENTARY((s)[--(i)], (c)); \ - } \ -} - -/** - * Move the string offset from one code point boundary to the previous one - * and get the code point between them. - * (Pre-decrementing backward iteration.) - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The input offset may be the same as the string length. - * If the offset is behind a trail surrogate unit - * for a supplementary code point, then the macro will read - * the preceding lead surrogate as well. - * If the offset is behind a lead surrogate or behind a single, unpaired - * trail surrogate, then c is set to that unpaired surrogate. - * - * @param s const UChar * string - * @param start starting string offset (usually 0) - * @param i string offset, must be start<i - * @param c output UChar32 variable - * @see U16_PREV_UNSAFE - * @stable ICU 2.4 - */ -#define U16_PREV(s, start, i, c) { \ - (c)=(s)[--(i)]; \ - if(U16_IS_TRAIL(c)) { \ - uint16_t __c2; \ - if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \ - --(i); \ - (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \ - } \ - } \ -} - -/** - * Move the string offset from one code point boundary to the previous one - * and get the code point between them. - * (Pre-decrementing backward iteration.) - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The input offset may be the same as the string length. - * If the offset is behind a trail surrogate unit - * for a supplementary code point, then the macro will read - * the preceding lead surrogate as well. - * If the offset is behind a lead surrogate or behind a single, unpaired - * trail surrogate, then c is set to U+FFFD. - * - * @param s const UChar * string - * @param start starting string offset (usually 0) - * @param i string offset, must be start<i - * @param c output UChar32 variable - * @see U16_PREV_UNSAFE - * @stable ICU 60 - */ -#define U16_PREV_OR_FFFD(s, start, i, c) { \ - (c)=(s)[--(i)]; \ - if(U16_IS_SURROGATE(c)) { \ - uint16_t __c2; \ - if(U16_IS_SURROGATE_TRAIL(c) && (i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \ - --(i); \ - (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \ - } else { \ - (c)=0xfffd; \ - } \ - } \ -} - -/** - * Move the string offset from one code point boundary to the previous one. - * (Pre-decrementing backward iteration.) - * The input offset may be the same as the string length. - * "Unsafe" macro, assumes well-formed UTF-16. - * - * @param s const UChar * string - * @param i string offset - * @see U16_BACK_1 - * @stable ICU 2.4 - */ -#define U16_BACK_1_UNSAFE(s, i) { \ - if(U16_IS_TRAIL((s)[--(i)])) { \ - --(i); \ - } \ -} - -/** - * Move the string offset from one code point boundary to the previous one. - * (Pre-decrementing backward iteration.) - * The input offset may be the same as the string length. - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * @param s const UChar * string - * @param start starting string offset (usually 0) - * @param i string offset, must be start<i - * @see U16_BACK_1_UNSAFE - * @stable ICU 2.4 - */ -#define U16_BACK_1(s, start, i) { \ - if(U16_IS_TRAIL((s)[--(i)]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \ - --(i); \ - } \ -} - -/** - * Move the string offset from one code point boundary to the n-th one before it, - * i.e., move backward by n code points. - * (Pre-decrementing backward iteration.) - * The input offset may be the same as the string length. - * "Unsafe" macro, assumes well-formed UTF-16. - * - * @param s const UChar * string - * @param i string offset - * @param n number of code points to skip - * @see U16_BACK_N - * @stable ICU 2.4 - */ -#define U16_BACK_N_UNSAFE(s, i, n) { \ - int32_t __N=(n); \ - while(__N>0) { \ - U16_BACK_1_UNSAFE(s, i); \ - --__N; \ - } \ -} - -/** - * Move the string offset from one code point boundary to the n-th one before it, - * i.e., move backward by n code points. - * (Pre-decrementing backward iteration.) - * The input offset may be the same as the string length. - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * @param s const UChar * string - * @param start start of string - * @param i string offset, must be start<i - * @param n number of code points to skip - * @see U16_BACK_N_UNSAFE - * @stable ICU 2.4 - */ -#define U16_BACK_N(s, start, i, n) { \ - int32_t __N=(n); \ - while(__N>0 && (i)>(start)) { \ - U16_BACK_1(s, start, i); \ - --__N; \ - } \ -} - -/** - * Adjust a random-access offset to a code point boundary after a code point. - * If the offset is behind the lead surrogate of a surrogate pair, - * then the offset is incremented. - * Otherwise, it is not modified. - * The input offset may be the same as the string length. - * "Unsafe" macro, assumes well-formed UTF-16. - * - * @param s const UChar * string - * @param i string offset - * @see U16_SET_CP_LIMIT - * @stable ICU 2.4 - */ -#define U16_SET_CP_LIMIT_UNSAFE(s, i) { \ - if(U16_IS_LEAD((s)[(i)-1])) { \ - ++(i); \ - } \ -} - -/** - * Adjust a random-access offset to a code point boundary after a code point. - * If the offset is behind the lead surrogate of a surrogate pair, - * then the offset is incremented. - * Otherwise, it is not modified. - * The input offset may be the same as the string length. - * "Safe" macro, handles unpaired surrogates and checks for string boundaries. - * - * The length can be negative for a NUL-terminated string. - * - * @param s const UChar * string - * @param start int32_t starting string offset (usually 0) - * @param i int32_t string offset, start<=i<=length - * @param length int32_t string length - * @see U16_SET_CP_LIMIT_UNSAFE - * @stable ICU 2.4 - */ -#define U16_SET_CP_LIMIT(s, start, i, length) { \ - if((start)<(i) && ((i)<(length) || (length)<0) && U16_IS_LEAD((s)[(i)-1]) && U16_IS_TRAIL((s)[i])) { \ - ++(i); \ - } \ -} - -#endif |