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27 #include "wtf/text/TextCodecUserDefined.h"
29 #include "wtf/PassOwnPtr.h"
30 #include "wtf/text/CString.h"
31 #include "wtf/text/StringBuffer.h"
32 #include "wtf/text/StringBuilder.h"
33 #include "wtf/text/WTFString.h"
37 void TextCodecUserDefined::registerEncodingNames(EncodingNameRegistrar registrar)
39 registrar("x-user-defined", "x-user-defined");
42 static PassOwnPtr<TextCodec> newStreamingTextDecoderUserDefined(const TextEncoding&, const void*)
44 return adoptPtr(new TextCodecUserDefined);
47 void TextCodecUserDefined::registerCodecs(TextCodecRegistrar registrar)
49 registrar("x-user-defined", newStreamingTextDecoderUserDefined, 0);
52 String TextCodecUserDefined::decode(const char* bytes, size_t length, FlushBehavior, bool, bool&)
55 result.reserveCapacity(length);
57 for (size_t i = 0; i < length; ++i) {
58 signed char c = bytes[i];
59 result.append(static_cast<UChar>(c & 0xF7FF));
62 return result.toString();
65 template<typename CharType>
66 static CString encodeComplexUserDefined(const CharType* characters, size_t length, UnencodableHandling handling)
68 Vector<char> result(length);
69 char* bytes = result.data();
71 size_t resultLength = 0;
72 for (size_t i = 0; i < length; ) {
74 U16_NEXT(characters, i, length, c);
75 signed char signedByte = static_cast<signed char>(c);
76 if ((signedByte & 0xF7FF) == c)
77 bytes[resultLength++] = signedByte;
79 // No way to encode this character with x-user-defined.
80 UnencodableReplacementArray replacement;
81 int replacementLength = TextCodec::getUnencodableReplacement(c, handling, replacement);
82 result.grow(resultLength + replacementLength + length - i);
83 bytes = result.data();
84 memcpy(bytes + resultLength, replacement, replacementLength);
85 resultLength += replacementLength;
89 return CString(bytes, resultLength);
92 template<typename CharType>
93 CString TextCodecUserDefined::encodeCommon(const CharType* characters, size_t length, UnencodableHandling handling)
96 CString result = CString::newUninitialized(length, bytes);
98 // Convert the string a fast way and simultaneously do an efficient check to see if it's all ASCII.
100 for (size_t i = 0; i < length; ++i) {
101 UChar c = characters[i];
102 bytes[i] = static_cast<char>(c);
106 if (!(ored & 0xFF80))
109 // If it wasn't all ASCII, call the function that handles more-complex cases.
110 return encodeComplexUserDefined(characters, length, handling);
113 CString TextCodecUserDefined::encode(const UChar* characters, size_t length, UnencodableHandling handling)
115 return encodeCommon(characters, length, handling);
118 CString TextCodecUserDefined::encode(const LChar* characters, size_t length, UnencodableHandling handling)
120 return encodeCommon(characters, length, handling);