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3.4 Character Set Conversion

stringprep_locale_charset

Function: const char * stringprep_locale_charset ( void)

Find out current locale charset. The function respect the CHARSET environment variable, but typically uses nl_langinfo(CODESET) when it is supported. It fall back on "ASCII" if CHARSET isn’t set and nl_langinfo isn’t supported or return anything.

Note that this function return the application’s locale’s preferred charset (or thread’s locale’s preffered charset, if your system support thread-specific locales). It does not return what the system may be using. Thus, if you receive data from external sources you cannot in general use this function to guess what charset it is encoded in. Use stringprep_convert from the external representation into the charset returned by this function, to have data in the locale encoding.

Return value: Return the character set used by the current locale. It will never return NULL, but use "ASCII" as a fallback.

stringprep_convert

Function: char * stringprep_convert (const char * str, const char * to_codeset, const char * from_codeset)

str: input zero-terminated string.

to_codeset: name of destination character set.

from_codeset: name of origin character set, as used by str.

Convert the string from one character set to another using the system’s iconv() function.

Return value: Returns newly allocated zero-terminated string which is str transcoded into to_codeset.

stringprep_locale_to_utf8

Function: char * stringprep_locale_to_utf8 (const char * str)

str: input zero terminated string.

Convert string encoded in the locale’s character set into UTF-8 by using stringprep_convert().

Return value: Returns newly allocated zero-terminated string which is str transcoded into UTF-8.

stringprep_utf8_to_locale

Function: char * stringprep_utf8_to_locale (const char * str)

str: input zero terminated string.

Convert string encoded in UTF-8 into the locale’s character set by using stringprep_convert().

Return value: Returns newly allocated zero-terminated string which is str transcoded into the locale’s character set.


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