/usr/include/osmium/javascript/unicode.hpp is in libosmium-dev 0.0~20140910-9a069af-1+b1.
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 | #ifndef OSMIUM_JAVASCRIPT_UNICODE_HPP
#define OSMIUM_JAVASCRIPT_UNICODE_HPP
/*
Copyright 2012 Jochen Topf <jochen@topf.org> and others (see README).
This file is part of Osmium (https://github.com/joto/osmium).
Osmium is free software: you can redistribute it and/or modify it under the
terms of the GNU Lesser General Public License or (at your option) the GNU
General Public License as published by the Free Software Foundation, either
version 3 of the Licenses, or (at your option) any later version.
Osmium is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU Lesser General Public License and the GNU
General Public License for more details.
You should have received a copy of the Licenses along with Osmium. If not, see
<http://www.gnu.org/licenses/>.
*/
#include <cstdlib>
#include <ostream>
#include <v8.h>
#include <unicode/ustring.h>
namespace Osmium {
/* These unicode conversion functions are used to convert UTF-8 to UTF-16 and then into
a v8::String and back, because the functions that v8 has for this do not handle
characters outside the Basic Multilingual Plane (>16bit) properly. */
/// Parent exception class for Unicode conversion errors.
class Unicode_Conversion_Error {
public:
UErrorCode error_code;
Unicode_Conversion_Error(UErrorCode ec) :
error_code(ec) { }
/// Is this a buffer overflow?
bool buffer_overflow() const {
return error_code == U_BUFFER_OVERFLOW_ERROR;
}
}; // class Unicode_Conversion_Error
/// Exception thrown when a UTF-8 to UTF-16 conversion failed.
class UTF8_to_UTF16_Conversion_Error : public Unicode_Conversion_Error {
public:
UTF8_to_UTF16_Conversion_Error(UErrorCode ec) :
Unicode_Conversion_Error(ec) { }
}; // class UTF8_to_UTF16_Conversion_Error
/// Exception thrown when a UTF-16 to UTF-8 conversion failed.
class UTF16_to_UTF8_Conversion_Error : public Unicode_Conversion_Error {
public:
UTF16_to_UTF8_Conversion_Error(UErrorCode ec) :
Unicode_Conversion_Error(ec) { }
}; // class UTF16_to_UTF8_Conversion_Error
/**
* Convert C string with UTF-8 codes into v8::String.
*
* @exception UTF8_to_UTF16_Conversion_Error Thrown if the conversion failed.
* @tparam characters Maximum number of Unicode characters.
* @param cstring A NULL terminated C string.
* @return A local handle to a v8 String.
*/
template <int characters>
inline v8::Local<v8::String> utf8_to_v8_String(const char* cstring) {
UErrorCode error_code = U_ZERO_ERROR;
UChar dest[characters*2];
int32_t dest_length;
u_strFromUTF8(dest, characters*2, &dest_length, cstring, -1, &error_code);
if (error_code != U_ZERO_ERROR) {
throw UTF8_to_UTF16_Conversion_Error(error_code);
}
return v8::String::New(dest, dest_length);
}
/**
* Convert v8::String into C string with UTF-8 codes.
*
* @exception UTF16_to_UTF8_Conversion_Error Thrown if the conversion failed.
* @tparam characters Maximum number of Unicode characters.
* @param string A v8::String.
* @return Returns a pointer to a static buffer with a NULL terminated C string.
*/
template <int characters>
inline const char* v8_String_to_utf8(v8::Local<v8::String> string) {
UErrorCode error_code = U_ZERO_ERROR;
uint16_t src[characters*2];
static char buffer[characters*4];
int32_t buffer_length;
string->Write(src, 0, characters*2);
u_strToUTF8(buffer, characters*4, &buffer_length, src, std::min(characters*2, string->Length()), &error_code);
if (error_code != U_ZERO_ERROR) {
throw UTF16_to_UTF8_Conversion_Error(error_code);
}
return buffer;
}
/**
* Sends v8::String to output stream. This will first convert it to a UTF-8 string.
*
* @exception UTF16_to_UTF8_Conversion_Error Thrown if the conversion failed.
* @param string A v8::String.
* @param os A reference to an output stream.
*/
inline void v8_String_to_ostream(v8::Local<v8::String> string, std::ostream& os) {
UErrorCode error_code = U_ZERO_ERROR;
int length = 4 * (string->Length() + 1);
uint16_t* src = static_cast<uint16_t*>(malloc(length));
if (!src) {
throw std::bad_alloc();
}
char* buffer = static_cast<char*>(malloc(length));
if (!buffer) {
free(src);
throw std::bad_alloc();
}
int32_t buffer_length;
string->Write(src);
u_strToUTF8(buffer, length, &buffer_length, src, string->Length(), &error_code);
if (error_code != U_ZERO_ERROR) {
free(buffer);
free(src);
throw UTF16_to_UTF8_Conversion_Error(error_code);
}
os << buffer;
free(buffer);
free(src);
}
} // namespace Osmium
#endif // OSMIUM_JAVASCRIPT_UNICODE_HPP
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