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This commit is contained in:
qPCR4vir 2016-03-23 17:19:54 +01:00
parent d2b08d0f26
commit 266def9ee3
2 changed files with 32 additions and 31 deletions
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50
include/nana/charset.hpp
View File

@ -46,7 +46,31 @@ namespace nana
class charset_encoding_interface;
}
/// An intelligent charset class for character code conversion.
/*!\class charset
\brief An intelligent charset class for character code conversion.
Example:
1. A UTF-8 string from the socket.
int len = ::recv(sd, buf, buflen, 0);
textbox.caption(nana::charset(std::string(buf, len), nana::unicode::utf8));
2. Send the string in text to the socket as UTF-8.
std::string utf8str = nana::charset(textbox.caption()).to_bytes(nana::unicode::utf8);
::send(sd, utf8str.c_str(), utf8str.size(), 0);
3, Convert a string to the specified multi-byte character code.
// Convert to a multibytes string through default system language.
std::string mbstr = nana::charset(a_wstring);
// If the default system language is English and convert
// a Chinese unicode string to multibytes string through GB2312
std::setlocale(LC_CTYPE, "zh_CN.GB2312");
//set::setlocale(LC_CTYPE, ".936"); call it in Windows
std::string mbstr = nana::charset(a_wstring_with_chinese);
*/
class charset
{
public:
@ -74,27 +98,3 @@ namespace nana
}//end namespace nana
#endif
/*!\class charset
Example
1. A UTF-8 string from the socket.
int len = ::recv(sd, buf, buflen, 0);
textbox.caption(nana::charset(std::string(buf, len), nana::unicode::utf8));
2. Send the string in text to the socket as UTF-8.
std::string utf8str = nana::charset(textbox.caption()).to_bytes(nana::unicode::utf8);
::send(sd, utf8str.c_str(), utf8str.size(), 0);
3, Convert a string to the specified multi-byte character code.
//Convert to a multibytes string through default system language.
std::string mbstr = nana::charset(a_wstring);
//If the default system language is English and convert
//a Chinese unicode string to multibytes string through GB2312
std::setlocale(LC_CTYPE, "zh_CN.GB2312");
//set::setlocale(LC_CTYPE, ".936"); call it in Windows
std::string mbstr = nana::charset(a_wstring_with_chinese);
*/

13
source/charset.cpp
View File

@ -578,37 +578,38 @@ namespace nana
std::string data_for_move_;
};
#else
/// return the first code point and move the pointer to next character, springing to the end by errors
unsigned long utf8char(const unsigned char*& p, const unsigned char* end)
{
if(p != end)
{
if(*p < 0x80)
if(*p < 0x80) // ASCII char 0-127 or 0-0x80
{
return *(p++);
}
unsigned ch = *p;
unsigned long code;
if(ch < 0xC0)
if(ch < 0xC0) // error? - move to end. Posible ANSI or ISO code-page
{
p = end;
return 0;
}
else if(ch < 0xE0 && (p + 1 <= end))
else if(ch < 0xE0 && (p + 1 <= end)) // two byte chararcter
{
code = ((ch & 0x1F) << 6) | (p[1] & 0x3F);
p += 2;
}
else if(ch < 0xF0 && (p + 2 <= end))
else if(ch < 0xF0 && (p + 2 <= end)) // 3 byte character
{
code = ((((ch & 0xF) << 6) | (p[1] & 0x3F)) << 6) | (p[2] & 0x3F);
p += 3;
}
else if(ch < 0x1F && (p + 3 <= end))
else if(ch < 0x1F && (p + 3 <= end)) // 4 byte character
{
code = ((((((ch & 0x7) << 6) | (p[1] & 0x3F)) << 6) | (p[2] & 0x3F)) << 6) | (p[3] & 0x3F);
p += 4;
}
else
else // error, go to end
{
p = end;
return 0;