Index: base/third_party/icu/icu_utf.h |
=================================================================== |
--- base/third_party/icu/icu_utf.h (revision 0) |
+++ base/third_party/icu/icu_utf.h (revision 0) |
@@ -0,0 +1,358 @@ |
+/* |
+******************************************************************************* |
+* |
+* Copyright (C) 1999-2004, International Business Machines |
+* Corporation and others. All Rights Reserved. |
+* |
+******************************************************************************* |
+* file name: utf.h |
+* encoding: US-ASCII |
+* tab size: 8 (not used) |
+* indentation:4 |
+* |
+* created on: 1999sep09 |
+* created by: Markus W. Scherer |
+*/ |
+ |
+#ifndef BASE_THIRD_PARTY_ICU_ICU_UTF_H_ |
+#define BASE_THIRD_PARTY_ICU_ICU_UTF_H_ |
+ |
+#include "base/basictypes.h" |
+ |
+namespace base_icu { |
+ |
+typedef uint32 UChar32; |
+typedef int8 UBool; |
+ |
+// General --------------------------------------------------------------------- |
+// from utf.h |
+ |
+/** |
+ * This value is intended for sentinel values for APIs that |
+ * (take or) return single code points (UChar32). |
+ * It is outside of the Unicode code point range 0..0x10ffff. |
+ * |
+ * For example, a "done" or "error" value in a new API |
+ * could be indicated with CBU_SENTINEL. |
+ * |
+ * ICU APIs designed before ICU 2.4 usually define service-specific "done" |
+ * values, mostly 0xffff. |
+ * Those may need to be distinguished from |
+ * actual U+ffff text contents by calling functions like |
+ * CharacterIterator::hasNext() or UnicodeString::length(). |
+ * |
+ * @return -1 |
+ * @see UChar32 |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU_SENTINEL (-1) |
+ |
+/** |
+ * Is this code point a Unicode noncharacter? |
+ * @param c 32-bit code point |
+ * @return TRUE or FALSE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU_IS_UNICODE_NONCHAR(c) \ |
+ ((c)>=0xfdd0 && \ |
+ ((uint32)(c)<=0xfdef || ((c)&0xfffe)==0xfffe) && \ |
+ (uint32)(c)<=0x10ffff) |
+ |
+/** |
+ * Is c a Unicode code point value (0..U+10ffff) |
+ * that can be assigned a character? |
+ * |
+ * Code points that are not characters include: |
+ * - single surrogate code points (U+d800..U+dfff, 2048 code points) |
+ * - the last two code points on each plane (U+__fffe and U+__ffff, 34 code points) |
+ * - U+fdd0..U+fdef (new with Unicode 3.1, 32 code points) |
+ * - the highest Unicode code point value is U+10ffff |
+ * |
+ * This means that all code points below U+d800 are character code points, |
+ * and that boundary is tested first for performance. |
+ * |
+ * @param c 32-bit code point |
+ * @return TRUE or FALSE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU_IS_UNICODE_CHAR(c) \ |
+ ((uint32)(c)<0xd800 || \ |
+ ((uint32)(c)>0xdfff && \ |
+ (uint32)(c)<=0x10ffff && \ |
+ !U_IS_UNICODE_NONCHAR(c))) |
+ |
+/** |
+ * Is this code point a surrogate (U+d800..U+dfff)? |
+ * @param c 32-bit code point |
+ * @return TRUE or FALSE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU_IS_SURROGATE(c) (((c)&0xfffff800)==0xd800) |
+ |
+/** |
+ * Assuming c is a surrogate code point (U_IS_SURROGATE(c)), |
+ * is it a lead surrogate? |
+ * @param c 32-bit code point |
+ * @return TRUE or FALSE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU_IS_SURROGATE_LEAD(c) (((c)&0x400)==0) |
+ |
+ |
+// UTF-8 macros ---------------------------------------------------------------- |
+// from utf8.h |
+ |
+extern const uint8 utf8_countTrailBytes[256]; |
+ |
+/** |
+ * Count the trail bytes for a UTF-8 lead byte. |
+ * @internal |
+ */ |
+#define CBU8_COUNT_TRAIL_BYTES(leadByte) (base_icu::utf8_countTrailBytes[(uint8)leadByte]) |
+ |
+/** |
+ * Mask a UTF-8 lead byte, leave only the lower bits that form part of the code point value. |
+ * @internal |
+ */ |
+#define CBU8_MASK_LEAD_BYTE(leadByte, countTrailBytes) ((leadByte)&=(1<<(6-(countTrailBytes)))-1) |
+ |
+/** |
+ * Does this code unit (byte) encode a code point by itself (US-ASCII 0..0x7f)? |
+ * @param c 8-bit code unit (byte) |
+ * @return TRUE or FALSE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU8_IS_SINGLE(c) (((c)&0x80)==0) |
+ |
+/** |
+ * Is this code unit (byte) a UTF-8 lead byte? |
+ * @param c 8-bit code unit (byte) |
+ * @return TRUE or FALSE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU8_IS_LEAD(c) ((uint8)((c)-0xc0)<0x3e) |
+ |
+/** |
+ * Is this code unit (byte) a UTF-8 trail byte? |
+ * @param c 8-bit code unit (byte) |
+ * @return TRUE or FALSE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU8_IS_TRAIL(c) (((c)&0xc0)==0x80) |
+ |
+/** |
+ * How many code units (bytes) are used for the UTF-8 encoding |
+ * of this Unicode code point? |
+ * @param c 32-bit code point |
+ * @return 1..4, or 0 if c is a surrogate or not a Unicode code point |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU8_LENGTH(c) \ |
+ ((uint32)(c)<=0x7f ? 1 : \ |
+ ((uint32)(c)<=0x7ff ? 2 : \ |
+ ((uint32)(c)<=0xd7ff ? 3 : \ |
+ ((uint32)(c)<=0xdfff || (uint32)(c)>0x10ffff ? 0 : \ |
+ ((uint32)(c)<=0xffff ? 3 : 4)\ |
+ ) \ |
+ ) \ |
+ ) \ |
+ ) |
+ |
+/** |
+ * The maximum number of UTF-8 code units (bytes) per Unicode code point (U+0000..U+10ffff). |
+ * @return 4 |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU8_MAX_LENGTH 4 |
+ |
+/** |
+ * Function for handling "next code point" with error-checking. |
+ * @internal |
+ */ |
+UChar32 utf8_nextCharSafeBody(const uint8 *s, int32 *pi, int32 length, UChar32 c, UBool strict); |
+ |
+/** |
+ * 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, checks for illegal sequences and for string boundaries. |
+ * |
+ * The offset may point to the lead byte of a multi-byte sequence, |
+ * in which case the macro will read the whole sequence. |
+ * If the offset points to a trail byte or an illegal UTF-8 sequence, then |
+ * c is set to a negative value. |
+ * |
+ * @param s const uint8 * string |
+ * @param i string offset, i<length |
+ * @param length string length |
+ * @param c output UChar32 variable, set to <0 in case of an error |
+ * @see CBU8_NEXT_UNSAFE |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU8_NEXT(s, i, length, c) { \ |
+ (c)=(s)[(i)++]; \ |
+ if(((uint8)(c))>=0x80) { \ |
+ if(CBU8_IS_LEAD(c)) { \ |
+ (c)=base_icu::utf8_nextCharSafeBody((const uint8 *)s, &(i), (int32)(length), c, -1); \ |
+ } else { \ |
+ (c)=CBU_SENTINEL; \ |
+ } \ |
+ } \ |
+} |
+ |
+/** |
+ * Append a code point to a string, overwriting 1 to 4 bytes. |
+ * 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 uint8 * string buffer |
+ * @param i string offset |
+ * @param c code point to append |
+ * @see CBU8_APPEND |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU8_APPEND_UNSAFE(s, i, c) { \ |
+ if((uint32)(c)<=0x7f) { \ |
+ (s)[(i)++]=(uint8)(c); \ |
+ } else { \ |
+ if((uint32)(c)<=0x7ff) { \ |
+ (s)[(i)++]=(uint8)(((c)>>6)|0xc0); \ |
+ } else { \ |
+ if((uint32)(c)<=0xffff) { \ |
+ (s)[(i)++]=(uint8)(((c)>>12)|0xe0); \ |
+ } else { \ |
+ (s)[(i)++]=(uint8)(((c)>>18)|0xf0); \ |
+ (s)[(i)++]=(uint8)((((c)>>12)&0x3f)|0x80); \ |
+ } \ |
+ (s)[(i)++]=(uint8)((((c)>>6)&0x3f)|0x80); \ |
+ } \ |
+ (s)[(i)++]=(uint8)(((c)&0x3f)|0x80); \ |
+ } \ |
+} |
+ |
+// UTF-16 macros --------------------------------------------------------------- |
+// from utf8.h |
+ |
+/** |
+ * 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 CBU16_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 CBU16_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 CBU16_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 CBU16_IS_SURROGATE(c) CBU_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 CBU16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0) |
+ |
+/** |
+ * Helper constant for CBU16_GET_SUPPLEMENTARY. |
+ * @internal |
+ */ |
+#define CBU16_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 CBU16_GET_SUPPLEMENTARY(lead, trail) \ |
+ (((base_icu::UChar32)(lead)<<10UL)+(base_icu::UChar32)(trail)-CBU16_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 CBU16_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 CBU16_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 CBU16_LENGTH(c) ((uint32)(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 CBU16_MAX_LENGTH 2 |
+ |
+/** |
+ * 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 CBU16_APPEND |
+ * @stable ICU 2.4 |
+ */ |
+#define CBU16_APPEND_UNSAFE(s, i, c) { \ |
+ if((uint32)(c)<=0xffff) { \ |
+ (s)[(i)++]=(uint16)(c); \ |
+ } else { \ |
+ (s)[(i)++]=(uint16)(((c)>>10)+0xd7c0); \ |
+ (s)[(i)++]=(uint16)(((c)&0x3ff)|0xdc00); \ |
+ } \ |
+} |
+ |
+} // namesapce base_icu |
+ |
+#endif // BASE_THIRD_PARTY_ICU_ICU_UTF_H_ |