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-rw-r--r--base/third_party/icu/README8
-rw-r--r--base/third_party/icu/icu_utf.cc228
-rw-r--r--base/third_party/icu/icu_utf.h358
3 files changed, 594 insertions, 0 deletions
diff --git a/base/third_party/icu/README b/base/third_party/icu/README
new file mode 100644
index 0000000..faeb5ef
--- /dev/null
+++ b/base/third_party/icu/README
@@ -0,0 +1,8 @@
+This file has the relevant components from ICU copied to handle basic
+UTF8/16/32 conversions. Components are copied from utf.h utf8.h utf16.h and
+utf_impl.c
+
+The main change is that U_/U8_/U16_ prefixes have been replaced with
+CBU_/CBU8_/CBU16_ (for "Chrome Base") to avoid confusion with the "real" ICU
+macros should ICU be in use on the system. For the same reason, the functions
+and types have been put in the "base_icu" namespace.
diff --git a/base/third_party/icu/icu_utf.cc b/base/third_party/icu/icu_utf.cc
new file mode 100644
index 0000000..b47c8ac
--- /dev/null
+++ b/base/third_party/icu/icu_utf.cc
@@ -0,0 +1,228 @@
+/*
+******************************************************************************
+*
+* Copyright (C) 1999-2006, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+******************************************************************************
+* file name: utf_impl.c
+* encoding: US-ASCII
+* tab size: 8 (not used)
+* indentation:4
+*
+* created on: 1999sep13
+* created by: Markus W. Scherer
+*
+* This file provides implementation functions for macros in the utfXX.h
+* that would otherwise be too long as macros.
+*/
+
+#include "base/third_party/icu/icu_utf.h"
+
+namespace base_icu {
+
+/**
+ * UTF8_ERROR_VALUE_1 and UTF8_ERROR_VALUE_2 are special error values for UTF-8,
+ * which need 1 or 2 bytes in UTF-8:
+ * \code
+ * U+0015 = NAK = Negative Acknowledge, C0 control character
+ * U+009f = highest C1 control character
+ * \endcode
+ *
+ * These are used by UTF8_..._SAFE macros so that they can return an error value
+ * that needs the same number of code units (bytes) as were seen by
+ * a macro. They should be tested with UTF_IS_ERROR() or UTF_IS_VALID().
+ *
+ * @deprecated ICU 2.4. Obsolete, see utf_old.h.
+ */
+#define CBUTF8_ERROR_VALUE_1 0x15
+
+/**
+ * See documentation on UTF8_ERROR_VALUE_1 for details.
+ *
+ * @deprecated ICU 2.4. Obsolete, see utf_old.h.
+ */
+#define CBUTF8_ERROR_VALUE_2 0x9f
+
+
+/**
+ * Error value for all UTFs. This code point value will be set by macros with e>
+ * checking if an error is detected.
+ *
+ * @deprecated ICU 2.4. Obsolete, see utf_old.h.
+ */
+#define CBUTF_ERROR_VALUE 0xffff
+
+/*
+ * This table could be replaced on many machines by
+ * a few lines of assembler code using an
+ * "index of first 0-bit from msb" instruction and
+ * one or two more integer instructions.
+ *
+ * For example, on an i386, do something like
+ * - MOV AL, leadByte
+ * - NOT AL (8-bit, leave b15..b8==0..0, reverse only b7..b0)
+ * - MOV AH, 0
+ * - BSR BX, AX (16-bit)
+ * - MOV AX, 6 (result)
+ * - JZ finish (ZF==1 if leadByte==0xff)
+ * - SUB AX, BX (result)
+ * -finish:
+ * (BSR: Bit Scan Reverse, scans for a 1-bit, starting from the MSB)
+ *
+ * In Unicode, all UTF-8 byte sequences with more than 4 bytes are illegal;
+ * lead bytes above 0xf4 are illegal.
+ * We keep them in this table for skipping long ISO 10646-UTF-8 sequences.
+ */
+const uint8
+utf8_countTrailBytes[256]={
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 3, 3, 3, 3, 3,
+ 3, 3, 3, /* illegal in Unicode */
+ 4, 4, 4, 4, /* illegal in Unicode */
+ 5, 5, /* illegal in Unicode */
+ 0, 0 /* illegal bytes 0xfe and 0xff */
+};
+
+static const UChar32
+utf8_minLegal[4]={ 0, 0x80, 0x800, 0x10000 };
+
+static const UChar32
+utf8_errorValue[6]={
+ CBUTF8_ERROR_VALUE_1, CBUTF8_ERROR_VALUE_2, CBUTF_ERROR_VALUE, 0x10ffff,
+ 0x3ffffff, 0x7fffffff
+};
+
+/*
+ * Handle the non-inline part of the U8_NEXT() macro and its obsolete sibling
+ * UTF8_NEXT_CHAR_SAFE().
+ *
+ * The "strict" parameter controls the error behavior:
+ * <0 "Safe" behavior of U8_NEXT(): All illegal byte sequences yield a negative
+ * code point result.
+ * 0 Obsolete "safe" behavior of UTF8_NEXT_CHAR_SAFE(..., FALSE):
+ * All illegal byte sequences yield a positive code point such that this
+ * result code point would be encoded with the same number of bytes as
+ * the illegal sequence.
+ * >0 Obsolete "strict" behavior of UTF8_NEXT_CHAR_SAFE(..., TRUE):
+ * Same as the obsolete "safe" behavior, but non-characters are also treated
+ * like illegal sequences.
+ *
+ * The special negative (<0) value -2 is used for lenient treatment of surrogate
+ * code points as legal. Some implementations use this for roundtripping of
+ * Unicode 16-bit strings that are not well-formed UTF-16, that is, they
+ * contain unpaired surrogates.
+ *
+ * Note that a UBool is the same as an int8_t.
+ */
+UChar32
+utf8_nextCharSafeBody(const uint8 *s, int32 *pi, int32 length, UChar32 c, UBool strict) {
+ int32 i=*pi;
+ uint8 count=CBU8_COUNT_TRAIL_BYTES(c);
+ if((i)+count<=(length)) {
+ uint8 trail, illegal=0;
+
+ CBU8_MASK_LEAD_BYTE((c), count);
+ /* count==0 for illegally leading trail bytes and the illegal bytes 0xfe and 0xff */
+ switch(count) {
+ /* each branch falls through to the next one */
+ case 5:
+ case 4:
+ /* count>=4 is always illegal: no more than 3 trail bytes in Unicode's UTF-8 */
+ illegal=1;
+ break;
+ case 3:
+ trail=s[(i)++];
+ (c)=((c)<<6)|(trail&0x3f);
+ if(c<0x110) {
+ illegal|=(trail&0xc0)^0x80;
+ } else {
+ /* code point>0x10ffff, outside Unicode */
+ illegal=1;
+ break;
+ }
+ case 2:
+ trail=s[(i)++];
+ (c)=((c)<<6)|(trail&0x3f);
+ illegal|=(trail&0xc0)^0x80;
+ case 1:
+ trail=s[(i)++];
+ (c)=((c)<<6)|(trail&0x3f);
+ illegal|=(trail&0xc0)^0x80;
+ break;
+ case 0:
+ if(strict>=0) {
+ return CBUTF8_ERROR_VALUE_1;
+ } else {
+ return CBU_SENTINEL;
+ }
+ /* no default branch to optimize switch() - all values are covered */
+ }
+
+ /*
+ * All the error handling should return a value
+ * that needs count bytes so that UTF8_GET_CHAR_SAFE() works right.
+ *
+ * Starting with Unicode 3.0.1, non-shortest forms are illegal.
+ * Starting with Unicode 3.2, surrogate code points must not be
+ * encoded in UTF-8, and there are no irregular sequences any more.
+ *
+ * U8_ macros (new in ICU 2.4) return negative values for error conditions.
+ */
+
+ /* correct sequence - all trail bytes have (b7..b6)==(10)? */
+ /* illegal is also set if count>=4 */
+ if(illegal || (c)<utf8_minLegal[count] || (CBU_IS_SURROGATE(c) && strict!=-2)) {
+ /* error handling */
+ uint8 errorCount=count;
+ /* don't go beyond this sequence */
+ i=*pi;
+ while(count>0 && CBU8_IS_TRAIL(s[i])) {
+ ++(i);
+ --count;
+ }
+ if(strict>=0) {
+ c=utf8_errorValue[errorCount-count];
+ } else {
+ c=CBU_SENTINEL;
+ }
+ } else if((strict)>0 && CBU_IS_UNICODE_NONCHAR(c)) {
+ /* strict: forbid non-characters like U+fffe */
+ c=utf8_errorValue[count];
+ }
+ } else /* too few bytes left */ {
+ /* error handling */
+ int32 i0=i;
+ /* don't just set (i)=(length) in case there is an illegal sequence */
+ while((i)<(length) && CBU8_IS_TRAIL(s[i])) {
+ ++(i);
+ }
+ if(strict>=0) {
+ c=utf8_errorValue[i-i0];
+ } else {
+ c=CBU_SENTINEL;
+ }
+ }
+ *pi=i;
+ return c;
+}
+
+} // namespace base_icu
diff --git a/base/third_party/icu/icu_utf.h b/base/third_party/icu/icu_utf.h
new file mode 100644
index 0000000..050a84b
--- /dev/null
+++ b/base/third_party/icu/icu_utf.h
@@ -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_
generated by cgit v1.1 at 2025-02-01 11:22:46 +0000