diff options
Diffstat (limited to 'security/sandbox/chromium/base/third_party/icu/icu_utf.cc')
| -rw-r--r-- | security/sandbox/chromium/base/third_party/icu/icu_utf.cc | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/security/sandbox/chromium/base/third_party/icu/icu_utf.cc b/security/sandbox/chromium/base/third_party/icu/icu_utf.cc deleted file mode 100644 index 2b67c5d9c..000000000 --- a/security/sandbox/chromium/base/third_party/icu/icu_utf.cc +++ /dev/null @@ -1,227 +0,0 @@ -/* -****************************************************************************** -* -* 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_t 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_t* s, - int32_t* pi, - int32_t length, - UChar32 c, - UBool strict) { - int32_t i = *pi; - uint8_t count = CBU8_COUNT_TRAIL_BYTES(c); - if((i)+count<=(length)) { - uint8_t 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_t 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_t 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 |