path, tag_id3: use g_convert() instead of charConv.c

GLib provides an easier API for character set conversion than iconv().
Use g_convert() / g_convert_with_fallback() for all character
conversions.  We should optimize the path.h API later to return a
newly allocated buffer, so we can just pass GLib's return value.

5 files changed, 40 insertions, 234 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 41bc69f0..3652caaa 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -45,7 +45,6 @@ mpd_headers = \
 	output_control.h \
 	audioOutputs/audioOutput_shout.h \
 	buffer2array.h \
-	charConv.h \
 	command.h \
 	idle.h \
 	condition.h \
@@ -131,7 +130,6 @@ mpd_SOURCES = \
 	output_control.c \
 	output_init.c \
 	buffer2array.c \
-	charConv.c \
 	command.c \
 	idle.c \
 	condition.c \
diff --git a/src/charConv.c b/src/charConv.c
deleted file mode 100644
index ba1ea50d..00000000
--- a/src/charConv.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/* 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 "utf8.h"
-#include "utils.h"
-#include "path.h"
-#include "os_compat.h"
-
-#include "../config.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 int8_t char_conv_same;
-static int8_t char_conv_use_iconv;
-
-/* 1 is to use latin1ToUtf8
-   0 is not to use latin1/utf8 converter
-  -1 is to use utf8ToLatin1*/
-static int8_t 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;
-	}
-}
diff --git a/src/charConv.h b/src/charConv.h
deleted file mode 100644
index 728f549b..00000000
--- a/src/charConv.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/* 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
- */
-
-#ifndef CHAR_CONV_H
-#define CHAR_CONV_H
-
-int setCharSetConversion(const char *to, const char *from);
-
-char *char_conv_str(char *dest, const char *string);
-
-#endif
diff --git a/src/path.c b/src/path.c
index 8d1b0018..0728aee6 100644
--- a/src/path.c
+++ b/src/path.c
@@ -18,7 +18,6 @@
 
 #include "path.h"
 #include "log.h"
-#include "charConv.h"
 #include "conf.h"
 #include "utf8.h"
 #include "utils.h"
@@ -32,28 +31,48 @@
 #endif
 #endif
 
+#include <glib.h>
+
 const char *musicDir;
 static const char *playlistDir;
 static size_t music_dir_len;
 static size_t playlist_dir_len;
 static char *fsCharset;
 
-static char *path_conv_charset(char *dest, const char *to,
-			       const char *from, const char *str)
-{
-	return setCharSetConversion(to, from) ? NULL : char_conv_str(dest, str);
-}
-
 char *fs_charset_to_utf8(char *dst, const char *str)
 {
-	char *ret = path_conv_charset(dst, "UTF-8", fsCharset, str);
-	return (ret && !validUtf8String(ret, strlen(ret))) ? NULL : ret;
+	gchar *p;
+	GError *error = NULL;
+
+	p = g_convert(str, -1,
+		      fsCharset, "utf-8",
+		      NULL, NULL, &error);
+	if (p == NULL)
+		/* no fallback */
+		return NULL;
+
+	g_strlcpy(dst, p, MPD_PATH_MAX);
+	g_free(p);
+	return dst;
 }
 
 char *utf8_to_fs_charset(char *dst, const char *str)
 {
-	char *ret = path_conv_charset(dst, fsCharset, "UTF-8", str);
-	return ret ? ret : strcpy(dst, str);
+	gchar *p;
+	GError *error = NULL;
+
+	p = g_convert(str, -1,
+		      "utf-8", fsCharset,
+		      NULL, NULL, &error);
+	if (p == NULL) {
+		/* fall back to UTF-8 */
+		g_error_free(error);
+		return strcpy(dst, str);
+	}
+
+	g_strlcpy(dst, p, MPD_PATH_MAX);
+	g_free(p);
+	return dst;
 }
 
 void setFsCharset(const char *charset)
@@ -67,19 +86,6 @@ void setFsCharset(const char *charset)
 
 	DEBUG("setFsCharset: fs charset is: %s\n", fsCharset);
 
-	if (setCharSetConversion("UTF-8", fsCharset) != 0) {
-		WARNING("fs charset conversion problem: "
-			"not able to convert from \"%s\" to \"%s\"\n",
-			fsCharset, "UTF-8");
-		error = 1;
-	}
-	if (setCharSetConversion(fsCharset, "UTF-8") != 0) {
-		WARNING("fs charset conversion problem: "
-			"not able to convert from \"%s\" to \"%s\"\n",
-			"UTF-8", fsCharset);
-		error = 1;
-	}
-
 	if (error) {
 		free(fsCharset);
 		WARNING("setting fs charset to ISO-8859-1!\n");
diff --git a/src/tag_id3.c b/src/tag_id3.c
index 7fcf9f0a..5d144b58 100644
--- a/src/tag_id3.c
+++ b/src/tag_id3.c
@@ -21,9 +21,9 @@
 #include "utils.h"
 #include "log.h"
 #include "conf.h"
-#include "charConv.h"
 
 #ifdef HAVE_ID3TAG
+#include <glib.h>
 #include <id3tag.h>
 #endif
 
@@ -54,16 +54,21 @@ static id3_utf8_t * processID3FieldString (int is_id3v1, const id3_ucs4_t *ucs4,
 	/* use encoding field here? */
 	if (is_id3v1 &&
 	    (encoding = getConfigParamValue(CONF_ID3V1_ENCODING))) {
+		GError *error = NULL;
+
 		isostr = id3_ucs4_latin1duplicate(ucs4);
 		if (mpd_unlikely(!isostr)) {
 			return NULL;
 		}
-		setCharSetConversion("UTF-8", encoding);
-		utf8 = xmalloc(strlen((char *)isostr) + 1);
-		utf8 = (id3_utf8_t *)char_conv_str((char *)utf8, (char *)isostr);
-		if (!utf8) {
+
+		utf8 = (id3_utf8_t *)
+			g_convert_with_fallback((const char*)isostr, -1,
+						encoding, "utf-8",
+						NULL, NULL, NULL, &error);
+		if (utf8 == NULL) {
 			DEBUG("Unable to convert %s string to UTF-8: "
 			      "'%s'\n", encoding, isostr);
+			g_error_free(error);
 			free(isostr);
 			return NULL;
 		}