#ifndef SHARE__UTF8_H#define SHARE__UTF8_H /* * Convert a string between UTF-8 and the locale's charset. * Invalid bytes are replaced by '#', and characters that are * not available in the target encoding are replaced by '?'. * * If the locale's charset is not set explicitly then it is * obtained using nl_langinfo(CODESET), where available, the * environment variable CHARSET, or assumed to be US-ASCII. * * Return value of conversion functions: * *  -1 : memory allocation failed *   0 : data was converted exactly *   1 : valid data was converted approximately (using '?') *   2 : input was invalid (but still converted, using '#') *   3 : unknown encoding (but still converted, using '?') */ int utf8_encode(const char *from, char **to);int utf8_decode(const char *from, char **to); #endif