Move files in wtf/ to platform/wtf/ (Part 9).

third_party/WebKit/Source/wtf/text/UTF8.cpp

Index: third_party/WebKit/Source/wtf/text/UTF8.cpp
diff --git a/third_party/WebKit/Source/wtf/text/UTF8.cpp b/third_party/WebKit/Source/wtf/text/UTF8.cpp
deleted file mode 100644
index cdd89a2edfb608dccd685177eb3066f4046d4d25..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/wtf/text/UTF8.cpp
+++ /dev/null
@@ -1,466 +0,0 @@
-/*
- * Copyright (C) 2007 Apple Inc.  All rights reserved.
- * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "wtf/text/UTF8.h"
-
-#include "wtf/ASCIICType.h"
-#include "wtf/StringHasher.h"
-#include "wtf/text/CharacterNames.h"
-
-namespace WTF {
-namespace Unicode {
-
-inline int inlineUTF8SequenceLengthNonASCII(char b0) {
-  if ((b0 & 0xC0) != 0xC0)
-    return 0;
-  if ((b0 & 0xE0) == 0xC0)
-    return 2;
-  if ((b0 & 0xF0) == 0xE0)
-    return 3;
-  if ((b0 & 0xF8) == 0xF0)
-    return 4;
-  return 0;
-}
-
-inline int inlineUTF8SequenceLength(char b0) {
-  return isASCII(b0) ? 1 : inlineUTF8SequenceLengthNonASCII(b0);
-}
-
-// Once the bits are split out into bytes of UTF-8, this is a mask OR-ed
-// into the first byte, depending on how many bytes follow.  There are
-// as many entries in this table as there are UTF-8 sequence types.
-// (I.e., one byte sequence, two byte... etc.). Remember that sequences
-// for *legal* UTF-8 will be 4 or fewer bytes total.
-static const unsigned char firstByteMark[7] = {0x00, 0x00, 0xC0, 0xE0,
-                                               0xF0, 0xF8, 0xFC};
-
-ConversionResult convertLatin1ToUTF8(const LChar** sourceStart,
-                                     const LChar* sourceEnd,
-                                     char** targetStart,
-                                     char* targetEnd) {
-  ConversionResult result = conversionOK;
-  const LChar* source = *sourceStart;
-  char* target = *targetStart;
-  while (source < sourceEnd) {
-    UChar32 ch;
-    unsigned short bytesToWrite = 0;
-    const UChar32 byteMask = 0xBF;
-    const UChar32 byteMark = 0x80;
-    const LChar* oldSource =
-        source;  // In case we have to back up because of target overflow.
-    ch = static_cast<unsigned short>(*source++);
-
-    // Figure out how many bytes the result will require
-    if (ch < (UChar32)0x80)
-      bytesToWrite = 1;
-    else
-      bytesToWrite = 2;
-
-    target += bytesToWrite;
-    if (target > targetEnd) {
-      source = oldSource;  // Back up source pointer!
-      target -= bytesToWrite;
-      result = targetExhausted;
-      break;
-    }
-    switch (bytesToWrite) {  // note: everything falls through.
-      case 2:
-        *--target = (char)((ch | byteMark) & byteMask);
-        ch >>= 6;
-      case 1:
-        *--target = (char)(ch | firstByteMark[bytesToWrite]);
-    }
-    target += bytesToWrite;
-  }
-  *sourceStart = source;
-  *targetStart = target;
-  return result;
-}
-
-ConversionResult convertUTF16ToUTF8(const UChar** sourceStart,
-                                    const UChar* sourceEnd,
-                                    char** targetStart,
-                                    char* targetEnd,
-                                    bool strict) {
-  ConversionResult result = conversionOK;
-  const UChar* source = *sourceStart;
-  char* target = *targetStart;
-  while (source < sourceEnd) {
-    UChar32 ch;
-    unsigned short bytesToWrite = 0;
-    const UChar32 byteMask = 0xBF;
-    const UChar32 byteMark = 0x80;
-    const UChar* oldSource =
-        source;  // In case we have to back up because of target overflow.
-    ch = static_cast<unsigned short>(*source++);
-    // If we have a surrogate pair, convert to UChar32 first.
-    if (ch >= 0xD800 && ch <= 0xDBFF) {
-      // If the 16 bits following the high surrogate are in the source buffer...
-      if (source < sourceEnd) {
-        UChar32 ch2 = static_cast<unsigned short>(*source);
-        // If it's a low surrogate, convert to UChar32.
-        if (ch2 >= 0xDC00 && ch2 <= 0xDFFF) {
-          ch = ((ch - 0xD800) << 10) + (ch2 - 0xDC00) + 0x0010000;
-          ++source;
-        } else if (strict) {  // it's an unpaired high surrogate
-          --source;           // return to the illegal value itself
-          result = sourceIllegal;
-          break;
-        }
-      } else {     // We don't have the 16 bits following the high surrogate.
-        --source;  // return to the high surrogate
-        result = sourceExhausted;
-        break;
-      }
-    } else if (strict) {
-      // UTF-16 surrogate values are illegal in UTF-32
-      if (ch >= 0xDC00 && ch <= 0xDFFF) {
-        --source;  // return to the illegal value itself
-        result = sourceIllegal;
-        break;
-      }
-    }
-    // Figure out how many bytes the result will require
-    if (ch < (UChar32)0x80) {
-      bytesToWrite = 1;
-    } else if (ch < (UChar32)0x800) {
-      bytesToWrite = 2;
-    } else if (ch < (UChar32)0x10000) {
-      bytesToWrite = 3;
-    } else if (ch < (UChar32)0x110000) {
-      bytesToWrite = 4;
-    } else {
-      bytesToWrite = 3;
-      ch = replacementCharacter;
-    }
-
-    target += bytesToWrite;
-    if (target > targetEnd) {
-      source = oldSource;  // Back up source pointer!
-      target -= bytesToWrite;
-      result = targetExhausted;
-      break;
-    }
-    switch (bytesToWrite) {  // note: everything falls through.
-      case 4:
-        *--target = (char)((ch | byteMark) & byteMask);
-        ch >>= 6;
-      case 3:
-        *--target = (char)((ch | byteMark) & byteMask);
-        ch >>= 6;
-      case 2:
-        *--target = (char)((ch | byteMark) & byteMask);
-        ch >>= 6;
-      case 1:
-        *--target = (char)(ch | firstByteMark[bytesToWrite]);
-    }
-    target += bytesToWrite;
-  }
-  *sourceStart = source;
-  *targetStart = target;
-  return result;
-}
-
-// This must be called with the length pre-determined by the first byte.
-// If presented with a length > 4, this returns false.  The Unicode
-// definition of UTF-8 goes up to 4-byte sequences.
-static bool isLegalUTF8(const unsigned char* source, int length) {
-  unsigned char a;
-  const unsigned char* srcptr = source + length;
-  switch (length) {
-    default:
-      return false;
-    // Everything else falls through when "true"...
-    case 4:
-      if ((a = (*--srcptr)) < 0x80 || a > 0xBF)
-        return false;
-    case 3:
-      if ((a = (*--srcptr)) < 0x80 || a > 0xBF)
-        return false;
-    case 2:
-      if ((a = (*--srcptr)) > 0xBF)
-        return false;
-
-      // no fall-through in this inner switch
-      switch (*source) {
-        case 0xE0:
-          if (a < 0xA0)
-            return false;
-          break;
-        case 0xED:
-          if (a > 0x9F)
-            return false;
-          break;
-        case 0xF0:
-          if (a < 0x90)
-            return false;
-          break;
-        case 0xF4:
-          if (a > 0x8F)
-            return false;
-          break;
-        default:
-          if (a < 0x80)
-            return false;
-      }
-
-    case 1:
-      if (*source >= 0x80 && *source < 0xC2)
-        return false;
-  }
-  if (*source > 0xF4)
-    return false;
-  return true;
-}
-
-// Magic values subtracted from a buffer value during UTF8 conversion.
-// This table contains as many values as there might be trailing bytes
-// in a UTF-8 sequence.
-static const UChar32 offsetsFromUTF8[6] = {0x00000000UL,
-                                           0x00003080UL,
-                                           0x000E2080UL,
-                                           0x03C82080UL,
-                                           static_cast<UChar32>(0xFA082080UL),
-                                           static_cast<UChar32>(0x82082080UL)};
-
-static inline UChar32 readUTF8Sequence(const char*& sequence, unsigned length) {
-  UChar32 character = 0;
-
-  // The cases all fall through.
-  switch (length) {
-    case 6:
-      character += static_cast<unsigned char>(*sequence++);
-      character <<= 6;
-    case 5:
-      character += static_cast<unsigned char>(*sequence++);
-      character <<= 6;
-    case 4:
-      character += static_cast<unsigned char>(*sequence++);
-      character <<= 6;
-    case 3:
-      character += static_cast<unsigned char>(*sequence++);
-      character <<= 6;
-    case 2:
-      character += static_cast<unsigned char>(*sequence++);
-      character <<= 6;
-    case 1:
-      character += static_cast<unsigned char>(*sequence++);
-  }
-
-  return character - offsetsFromUTF8[length - 1];
-}
-
-ConversionResult convertUTF8ToUTF16(const char** sourceStart,
-                                    const char* sourceEnd,
-                                    UChar** targetStart,
-                                    UChar* targetEnd,
-                                    bool* sourceAllASCII,
-                                    bool strict) {
-  ConversionResult result = conversionOK;
-  const char* source = *sourceStart;
-  UChar* target = *targetStart;
-  UChar orAllData = 0;
-  while (source < sourceEnd) {
-    int utf8SequenceLength = inlineUTF8SequenceLength(*source);
-    if (sourceEnd - source < utf8SequenceLength) {
-      result = sourceExhausted;
-      break;
-    }
-    // Do this check whether lenient or strict
-    if (!isLegalUTF8(reinterpret_cast<const unsigned char*>(source),
-                     utf8SequenceLength)) {
-      result = sourceIllegal;
-      break;
-    }
-
-    UChar32 character = readUTF8Sequence(source, utf8SequenceLength);
-
-    if (target >= targetEnd) {
-      source -= utf8SequenceLength;  // Back up source pointer!
-      result = targetExhausted;
-      break;
-    }
-
-    if (U_IS_BMP(character)) {
-      // UTF-16 surrogate values are illegal in UTF-32
-      if (U_IS_SURROGATE(character)) {
-        if (strict) {
-          source -= utf8SequenceLength;  // return to the illegal value itself
-          result = sourceIllegal;
-          break;
-        }
-        *target++ = replacementCharacter;
-        orAllData |= replacementCharacter;
-      } else {
-        *target++ = static_cast<UChar>(character);  // normal case
-        orAllData |= character;
-      }
-    } else if (U_IS_SUPPLEMENTARY(character)) {
-      // target is a character in range 0xFFFF - 0x10FFFF
-      if (target + 1 >= targetEnd) {
-        source -= utf8SequenceLength;  // Back up source pointer!
-        result = targetExhausted;
-        break;
-      }
-      *target++ = U16_LEAD(character);
-      *target++ = U16_TRAIL(character);
-      orAllData = 0xffff;
-    } else {
-      if (strict) {
-        source -= utf8SequenceLength;  // return to the start
-        result = sourceIllegal;
-        break;  // Bail out; shouldn't continue
-      } else {
-        *target++ = replacementCharacter;
-        orAllData |= replacementCharacter;
-      }
-    }
-  }
-  *sourceStart = source;
-  *targetStart = target;
-
-  if (sourceAllASCII)
-    *sourceAllASCII = !(orAllData & ~0x7f);
-
-  return result;
-}
-
-unsigned calculateStringHashAndLengthFromUTF8MaskingTop8Bits(
-    const char* data,
-    const char* dataEnd,
-    unsigned& dataLength,
-    unsigned& utf16Length) {
-  if (!data)
-    return 0;
-
-  StringHasher stringHasher;
-  dataLength = 0;
-  utf16Length = 0;
-
-  while (data < dataEnd || (!dataEnd && *data)) {
-    if (isASCII(*data)) {
-      stringHasher.addCharacter(*data++);
-      dataLength++;
-      utf16Length++;
-      continue;
-    }
-
-    int utf8SequenceLength = inlineUTF8SequenceLengthNonASCII(*data);
-    dataLength += utf8SequenceLength;
-
-    if (!dataEnd) {
-      for (int i = 1; i < utf8SequenceLength; ++i) {
-        if (!data[i])
-          return 0;
-      }
-    } else if (dataEnd - data < utf8SequenceLength) {
-      return 0;
-    }
-
-    if (!isLegalUTF8(reinterpret_cast<const unsigned char*>(data),
-                     utf8SequenceLength))
-      return 0;
-
-    UChar32 character = readUTF8Sequence(data, utf8SequenceLength);
-    DCHECK(!isASCII(character));
-
-    if (U_IS_BMP(character)) {
-      // UTF-16 surrogate values are illegal in UTF-32
-      if (U_IS_SURROGATE(character))
-        return 0;
-      stringHasher.addCharacter(static_cast<UChar>(character));  // normal case
-      utf16Length++;
-    } else if (U_IS_SUPPLEMENTARY(character)) {
-      stringHasher.addCharacters(static_cast<UChar>(U16_LEAD(character)),
-                                 static_cast<UChar>(U16_TRAIL(character)));
-      utf16Length += 2;
-    } else {
-      return 0;
-    }
-  }
-
-  return stringHasher.hashWithTop8BitsMasked();
-}
-
-template <typename CharType>
-ALWAYS_INLINE bool equalWithUTF8Internal(const CharType* a,
-                                         const CharType* aEnd,
-                                         const char* b,
-                                         const char* bEnd) {
-  while (b < bEnd) {
-    if (isASCII(*b)) {
-      if (*a++ != *b++)
-        return false;
-      continue;
-    }
-
-    int utf8SequenceLength = inlineUTF8SequenceLengthNonASCII(*b);
-
-    if (bEnd - b < utf8SequenceLength)
-      return false;
-
-    if (!isLegalUTF8(reinterpret_cast<const unsigned char*>(b),
-                     utf8SequenceLength))
-      return 0;
-
-    UChar32 character = readUTF8Sequence(b, utf8SequenceLength);
-    DCHECK(!isASCII(character));
-
-    if (U_IS_BMP(character)) {
-      // UTF-16 surrogate values are illegal in UTF-32
-      if (U_IS_SURROGATE(character))
-        return false;
-      if (*a++ != character)
-        return false;
-    } else if (U_IS_SUPPLEMENTARY(character)) {
-      if (*a++ != U16_LEAD(character))
-        return false;
-      if (*a++ != U16_TRAIL(character))
-        return false;
-    } else {
-      return false;
-    }
-  }
-
-  return a == aEnd;
-}
-
-bool equalUTF16WithUTF8(const UChar* a,
-                        const UChar* aEnd,
-                        const char* b,
-                        const char* bEnd) {
-  return equalWithUTF8Internal(a, aEnd, b, bEnd);
-}
-
-bool equalLatin1WithUTF8(const LChar* a,
-                         const LChar* aEnd,
-                         const char* b,
-                         const char* bEnd) {
-  return equalWithUTF8Internal(a, aEnd, b, bEnd);
-}
-
-}  // namespace Unicode
-}  // namespace WTF