/usr/include/mozjs-24/js/CharacterEncoding.h is in libmozjs-24-dev 24.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef js_CharacterEncoding_h
#define js_CharacterEncoding_h
#include "mozilla/Range.h"
#include "js/Utility.h"
#include "jspubtd.h"
namespace JS {
/*
* By default, all C/C++ 1-byte-per-character strings passed into the JSAPI
* are treated as ISO/IEC 8859-1, also known as Latin-1. That is, each
* byte is treated as a 2-byte character, and there is no way to pass in a
* string containing characters beyond U+00FF.
*/
class Latin1Chars : public mozilla::Range<unsigned char>
{
typedef mozilla::Range<unsigned char> Base;
public:
Latin1Chars() : Base() {}
Latin1Chars(char *aBytes, size_t aLength) : Base(reinterpret_cast<unsigned char *>(aBytes), aLength) {}
Latin1Chars(const char *aBytes, size_t aLength)
: Base(reinterpret_cast<unsigned char *>(const_cast<char *>(aBytes)), aLength)
{}
};
/*
* A Latin1Chars, but with \0 termination for C compatibility.
*/
class Latin1CharsZ : public mozilla::RangedPtr<unsigned char>
{
typedef mozilla::RangedPtr<unsigned char> Base;
public:
Latin1CharsZ() : Base(NULL, 0) {}
Latin1CharsZ(char *aBytes, size_t aLength)
: Base(reinterpret_cast<unsigned char *>(aBytes), aLength)
{
JS_ASSERT(aBytes[aLength] == '\0');
}
Latin1CharsZ(unsigned char *aBytes, size_t aLength)
: Base(aBytes, aLength)
{
JS_ASSERT(aBytes[aLength] == '\0');
}
char *c_str() { return reinterpret_cast<char *>(get()); }
};
/*
* SpiderMonkey also deals directly with UTF-8 encoded text in some places.
*/
class UTF8CharsZ : public mozilla::RangedPtr<unsigned char>
{
typedef mozilla::RangedPtr<unsigned char> Base;
public:
UTF8CharsZ() : Base(NULL, 0) {}
UTF8CharsZ(char *aBytes, size_t aLength)
: Base(reinterpret_cast<unsigned char *>(aBytes), aLength)
{
JS_ASSERT(aBytes[aLength] == '\0');
}
UTF8CharsZ(unsigned char *aBytes, size_t aLength)
: Base(aBytes, aLength)
{
JS_ASSERT(aBytes[aLength] == '\0');
}
char *c_str() { return reinterpret_cast<char *>(get()); }
};
/*
* SpiderMonkey uses a 2-byte character representation: it is a
* 2-byte-at-a-time view of a UTF-16 byte stream. This is similar to UCS-2,
* but unlike UCS-2, we do not strip UTF-16 extension bytes. This allows a
* sufficiently dedicated JavaScript program to be fully unicode-aware by
* manually interpreting UTF-16 extension characters embedded in the JS
* string.
*/
class TwoByteChars : public mozilla::Range<jschar>
{
typedef mozilla::Range<jschar> Base;
public:
TwoByteChars() : Base() {}
TwoByteChars(jschar *aChars, size_t aLength) : Base(aChars, aLength) {}
TwoByteChars(const jschar *aChars, size_t aLength) : Base(const_cast<jschar *>(aChars), aLength) {}
};
/*
* A non-convertible variant of TwoByteChars that does not refer to characters
* inlined inside a JSShortString or a JSInlineString. StableTwoByteChars are
* thus safe to hold across a GC.
*/
class StableTwoByteChars : public mozilla::Range<jschar>
{
typedef mozilla::Range<jschar> Base;
public:
StableTwoByteChars() : Base() {}
StableTwoByteChars(jschar *aChars, size_t aLength) : Base(aChars, aLength) {}
StableTwoByteChars(const jschar *aChars, size_t aLength) : Base(const_cast<jschar *>(aChars), aLength) {}
};
/*
* A TwoByteChars, but \0 terminated for compatibility with JSFlatString.
*/
class TwoByteCharsZ : public mozilla::RangedPtr<jschar>
{
typedef mozilla::RangedPtr<jschar> Base;
public:
TwoByteCharsZ(jschar *chars, size_t length)
: Base(chars, length)
{
JS_ASSERT(chars[length] = '\0');
}
};
/*
* Convert a 2-byte character sequence to "ISO-Latin-1". This works by
* truncating each 2-byte pair in the sequence to a 1-byte pair. If the source
* contains any UTF-16 extension characters, then this may give invalid Latin1
* output. The returned string is zero terminated. The returned string or the
* returned string's |start()| must be freed with JS_free or js_free,
* respectively. If allocation fails, an OOM error will be set and the method
* will return a NULL chars (which can be tested for with the ! operator).
* This method cannot trigger GC.
*/
extern Latin1CharsZ
LossyTwoByteCharsToNewLatin1CharsZ(JSContext *cx, TwoByteChars tbchars);
extern UTF8CharsZ
TwoByteCharsToNewUTF8CharsZ(JSContext *cx, TwoByteChars tbchars);
} // namespace JS
inline void JS_free(JS::Latin1CharsZ &ptr) { js_free((void*)ptr.get()); }
inline void JS_free(JS::UTF8CharsZ &ptr) { js_free((void*)ptr.get()); }
#endif /* js_CharacterEncoding_h */
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