/* the Music Player Daemon (MPD) * (c)2003-2006 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 "utf8.h" #include <stdio.h> #include <string.h> #include <stdlib.h> static char *latin1ToUtf8(char c) { static unsigned char utf8[3]; unsigned char uc = c; memset(utf8, 0, 3); if (uc < 128) utf8[0] = uc; else if (uc < 192) { utf8[0] = 194; utf8[1] = uc; } else { utf8[0] = 195; utf8[1] = uc - 64; } return (char *)utf8; } char *latin1StrToUtf8Dup(char *latin1) { /* utf8 should have at most two char's per latin1 char */ int len = strlen(latin1) * 2 + 1; char *ret = malloc(len); char *cp = ret; char *utf8; memset(ret, 0, len); len = 0; while (*latin1) { utf8 = latin1ToUtf8(*latin1); while (*utf8) { *(cp++) = *(utf8++); len++; } latin1++; } return realloc(ret, len + 1); } static char utf8ToLatin1(char *inUtf8) { unsigned char c = 0; unsigned char *utf8 = (unsigned char *)inUtf8; if (utf8[0] < 128) return utf8[0]; else if (utf8[0] == 195) c += 64; else if (utf8[0] != 194) return '?'; return (char)(c + utf8[1]); } static int validateUtf8Char(char *inUtf8Char) { unsigned char *utf8Char = (unsigned char *)inUtf8Char; if (utf8Char[0] < 0x80) return 1; if (utf8Char[0] >= 0xC0 && utf8Char[0] <= 0xFD) { int count = 1; char t = 1 << 5; int i; while (count < 6 && (t & utf8Char[0])) { t = (t >> 1); count++; } if (count > 5) return 0; for (i = 1; i <= count; i++) { if (utf8Char[i] < 0x80 || utf8Char[i] > 0xBF) return 0; } return count + 1; } else return 0; } int validUtf8String(char *string) { int ret; while (*string) { ret = validateUtf8Char(string); if (0 == ret) return 0; string += ret; } return 1; } char *utf8StrToLatin1Dup(char *utf8) { /* utf8 should have at most two char's per latin1 char */ int len = strlen(utf8) + 1; char *ret = malloc(len); char *cp = ret; int count; memset(ret, 0, len); len = 0; while (*utf8) { count = validateUtf8Char(utf8); if (!count) { free(ret); return NULL; } *(cp++) = utf8ToLatin1(utf8); utf8 += count; len++; } return realloc(ret, len + 1); }