diff options
Diffstat (limited to 'src/def_char.cpp')
-rw-r--r-- | src/def_char.cpp | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/src/def_char.cpp b/src/def_char.cpp deleted file mode 100644 index 512647eb2..000000000 --- a/src/def_char.cpp +++ /dev/null @@ -1,121 +0,0 @@ -/************************************************* -* Default Character Set Handling Source File * -* (C) 1999-2007 Jack Lloyd * -*************************************************/ - -#include <botan/def_char.h> -#include <botan/exceptn.h> -#include <botan/parsing.h> - -namespace Botan { - -namespace { - -/************************************************* -* Convert from UCS-2 to ISO 8859-1 * -*************************************************/ -std::string ucs2_to_latin1(const std::string& ucs2) - { - if(ucs2.size() % 2 == 1) - throw Decoding_Error("UCS-2 string has an odd number of bytes"); - - std::string latin1; - - for(u32bit j = 0; j != ucs2.size(); j += 2) - { - const byte c1 = ucs2[j]; - const byte c2 = ucs2[j+1]; - - if(c1 != 0) - throw Decoding_Error("UCS-2 has non-Latin1 characters"); - - latin1 += static_cast<char>(c2); - } - - return latin1; - } - -/************************************************* -* Convert from UTF-8 to ISO 8859-1 * -*************************************************/ -std::string utf8_to_latin1(const std::string& utf8) - { - std::string iso8859; - - u32bit position = 0; - while(position != utf8.size()) - { - const byte c1 = static_cast<byte>(utf8[position++]); - - if(c1 <= 0x7F) - iso8859 += static_cast<char>(c1); - else if(c1 >= 0xC0 && c1 <= 0xC7) - { - if(position == utf8.size()) - throw Decoding_Error("UTF-8: sequence truncated"); - - const byte c2 = static_cast<byte>(utf8[position++]); - const byte iso_char = ((c1 & 0x07) << 6) | (c2 & 0x3F); - - if(iso_char <= 0x7F) - throw Decoding_Error("UTF-8: sequence longer than needed"); - - iso8859 += static_cast<char>(iso_char); - } - else - throw Decoding_Error("UTF-8: Unicode chars not in Latin1 used"); - } - - return iso8859; - } - -/************************************************* -* Convert from ISO 8859-1 to UTF-8 * -*************************************************/ -std::string latin1_to_utf8(const std::string& iso8859) - { - std::string utf8; - for(u32bit j = 0; j != iso8859.size(); ++j) - { - const byte c = static_cast<byte>(iso8859[j]); - - if(c <= 0x7F) - utf8 += static_cast<char>(c); - else - { - utf8 += static_cast<char>((0xC0 | (c >> 6))); - utf8 += static_cast<char>((0x80 | (c & 0x3F))); - } - } - return utf8; - } - -} - -/************************************************* -* Transcode between character sets * -*************************************************/ -std::string Default_Charset_Transcoder::transcode(const std::string& str, - Character_Set to, - Character_Set from) const - { - if(to == LOCAL_CHARSET) - to = LATIN1_CHARSET; - if(from == LOCAL_CHARSET) - from = LATIN1_CHARSET; - - if(to == from) - return str; - - if(from == LATIN1_CHARSET && to == UTF8_CHARSET) - return latin1_to_utf8(str); - if(from == UTF8_CHARSET && to == LATIN1_CHARSET) - return utf8_to_latin1(str); - if(from == UCS2_CHARSET && to == LATIN1_CHARSET) - return ucs2_to_latin1(str); - - throw Invalid_Argument("Unknown transcoding operation from " + - to_string(from) + " to " + to_string(to)); - } - -} |