lots of fsCharset, utf8/ascii converting clean-up and robustness stuff

Also, if fsCharsetToUtf8 can't convert to valid UTF-8, then don't add
it to the db, this way clients don't have to worry about weirdness and it
will force ppl to convert it.

git-svn-id: https://svn.musicpd.org/mpd/trunk@711 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/charConv.c

@@ -17,6 +17,8 @@
  */
 
 #include "charConv.h"
+#include "mpd_types.h"
+#include "utf8.h"
 
 #include <stdlib.h>
 #include <errno.h>
@@ -25,14 +27,21 @@
 #ifdef HAVE_ICONV
 #include <iconv.h>
 iconv_t char_conv_iconv;
+#endif
+
 char * char_conv_to = NULL;
 char * char_conv_from = NULL;
-#endif
+mpd_sint8 char_conv_same = 0;
+mpd_sint8 char_conv_use_iconv = 0;
+
+/* 1 is to use asciiToUtf8
+   0 is not to use ascii/utf8 converter
+  -1 is to use utf8ToAscii*/	
+mpd_sint8 char_conv_asciiToUtf8 = 0;
 
 #define BUFFER_SIZE	1024
 
 int setCharSetConversion(char * to, char * from) {
-#ifdef HAVE_ICONV
 	if(char_conv_to && strcmp(to,char_conv_to)==0 &&
 			char_conv_from && strcmp(from,char_conv_from)==0)
 	{ 
@@ -41,60 +50,100 @@ int setCharSetConversion(char * to, char * from) {
 
 	closeCharSetConversion();
 
+	if(0==strcmp(to,from)) {
+		char_conv_same = 1;
+		char_conv_to = strdup(to);
+		char_conv_from = strdup(from);
+		return 0;
+	}
+
+	if(strcmp(to,"UTF-8")==0 && strcmp(from,"ISO-8859-1")==0) {
+		char_conv_asciiToUtf8 = 1;
+	}
+	else if(strcmp(to,"ISO-8859-1")==0 && strcmp(from,"UTF-8")==0) {
+		char_conv_asciiToUtf8 = -1;
+	}
+
+	if(char_conv_asciiToUtf8!=0) {
+		char_conv_to = strdup(to);
+		char_conv_from = strdup(from);
+		return 0;
+	}
+
+#ifdef HAVE_ICONV
 	if((char_conv_iconv = iconv_open(to,from))==(iconv_t)(-1)) return -1;
 
 	char_conv_to = strdup(to);
 	char_conv_from = strdup(from);
+	char_conv_use_iconv = 1;
 
 	return 0;
 #endif
+
 	return -1;
 }
 
 char * convStrDup(char * string) {
-#ifdef HAVE_ICONV
-	char buffer[BUFFER_SIZE];
-	size_t inleft = strlen(string);
-	char * ret;
-	size_t outleft;
-	size_t retlen = 0;
-	size_t err;
-	char * bufferPtr;
-
 	if(!char_conv_to) return NULL;
 
-	ret = malloc(1);
-	ret[0] = '\0';
+	if(char_conv_same) return strdup(string);
 
-	while(inleft) {
-		bufferPtr = buffer;
-		outleft = BUFFER_SIZE;
-		err = iconv(char_conv_iconv,&string,&inleft,&bufferPtr,
+#ifdef HAVE_ICONV
+	if(char_conv_use_iconv) {
+		char buffer[BUFFER_SIZE];
+		size_t inleft = strlen(string);
+		char * ret;
+		size_t outleft;
+		size_t retlen = 0;
+		size_t err;
+		char * bufferPtr;
+
+		ret = malloc(1);
+		ret[0] = '\0';
+
+		while(inleft) {
+			bufferPtr = buffer;
+			outleft = BUFFER_SIZE;
+			err = iconv(char_conv_iconv,&string,&inleft,&bufferPtr,
 					&outleft);
-		if(outleft==BUFFER_SIZE || (err<0 && errno!=E2BIG)) {
-			free(ret);
-			return NULL;
+			if(outleft==BUFFER_SIZE || (err<0 && errno!=E2BIG)) {
+				free(ret);
+				return NULL;
+			}
+
+			ret = realloc(ret,retlen+BUFFER_SIZE-outleft+1);
+			memcpy(ret+retlen,buffer,BUFFER_SIZE-outleft);
+			retlen+=BUFFER_SIZE-outleft;
+			ret[retlen] = '\0';
 		}
 
-		ret = realloc(ret,retlen+BUFFER_SIZE-outleft+1);
-		memcpy(ret+retlen,buffer,BUFFER_SIZE-outleft);
-		retlen+=BUFFER_SIZE-outleft;
-		ret[retlen] = '\0';
+		return ret;
+	}
+#endif
+
+	switch(char_conv_asciiToUtf8) {
+	case 1: 
+		return asciiStrToUtf8Dup(string);
+		break;
+	case -1:
+		return utf8StrToAsciiDup(string);
+		break;
 	}
 
-	return ret;
-#endif
 	return NULL;
 }
 
 void closeCharSetConversion() {
-#ifdef HAVE_ICONV
 	if(char_conv_to) {
-		iconv_close(char_conv_iconv);
+#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_asciiToUtf8 = 0;
+		char_conv_use_iconv = 0;
 	}
-#endif
 }