/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * This project's homepage is: http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "charConv.h" #include "mpd_types.h" #include "utf8.h" #include "utils.h" #include "path.h" #include "os_compat.h" #ifdef HAVE_ICONV #include <iconv.h> static iconv_t char_conv_iconv; #endif static char *char_conv_to; static char *char_conv_from; static mpd_sint8 char_conv_same; static mpd_sint8 char_conv_use_iconv; /* 1 is to use latin1ToUtf8 0 is not to use latin1/utf8 converter -1 is to use utf8ToLatin1*/ static mpd_sint8 char_conv_latin1ToUtf8; #define BUFFER_SIZE MPD_PATH_MAX static void closeCharSetConversion(void); int setCharSetConversion(const char *to, const char *from) { if (char_conv_to && char_conv_from) { if (char_conv_latin1ToUtf8 && !strcmp(from, char_conv_to) && !strcmp(to, char_conv_from)) { char *swap = char_conv_from; char_conv_from = char_conv_to; char_conv_to = swap; char_conv_latin1ToUtf8 *= -1; return 0; } else if (!strcmp(to, char_conv_to) && !strcmp(from,char_conv_from)) { return 0; } } closeCharSetConversion(); if (0 == strcmp(to, from)) { char_conv_same = 1; char_conv_to = xstrdup(to); char_conv_from = xstrdup(from); return 0; } if (strcmp(to, "UTF-8") == 0 && strcmp(from, "ISO-8859-1") == 0) { char_conv_latin1ToUtf8 = 1; } else if (strcmp(to, "ISO-8859-1") == 0 && strcmp(from, "UTF-8") == 0) { char_conv_latin1ToUtf8 = -1; } if (char_conv_latin1ToUtf8 != 0) { char_conv_to = xstrdup(to); char_conv_from = xstrdup(from); return 0; } #ifdef HAVE_ICONV if ((char_conv_iconv = iconv_open(to, from)) == (iconv_t) (-1)) return -1; char_conv_to = xstrdup(to); char_conv_from = xstrdup(from); char_conv_use_iconv = 1; return 0; #else return -1; #endif } #ifdef HAVE_ICONV static inline size_t deconst_iconv(iconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) { union { const char **a; char **b; } deconst; deconst.a = inbuf; return iconv(cd, deconst.b, inbytesleft, outbuf, outbytesleft); } #endif char *char_conv_str(char *dest, const char *string) { if (!char_conv_to) return NULL; if (char_conv_same) return strcpy(dest, string); #ifdef HAVE_ICONV if (char_conv_use_iconv) { /* not optimized: */ char buffer[BUFFER_SIZE]; size_t inleft = strlen(string); size_t outleft; size_t retlen = 0; size_t err; char *bufferPtr; dest[0] = '\0'; while (inleft) { bufferPtr = buffer; outleft = BUFFER_SIZE; err = deconst_iconv(char_conv_iconv, &string, &inleft, &bufferPtr, &outleft); if (outleft == BUFFER_SIZE || (err == (size_t)-1L && errno != E2BIG)) { return NULL; } memcpy(dest + retlen, buffer, BUFFER_SIZE - outleft); retlen += BUFFER_SIZE - outleft; dest[retlen] = '\0'; } return dest; } #endif switch (char_conv_latin1ToUtf8) { case 1: return latin1_to_utf8(dest, string); case -1: return utf8_to_latin1(dest, string); } return NULL; } static void closeCharSetConversion(void) { if (char_conv_to) { #ifdef HAVE_ICONV if (char_conv_use_iconv) iconv_close(char_conv_iconv); #endif free(char_conv_to); free(char_conv_from); char_conv_to = NULL; char_conv_from = NULL; char_conv_same = 0; char_conv_latin1ToUtf8 = 0; char_conv_use_iconv = 0; } }