Tag

External Text File Source - Versions 2.0.40b2 - b3

NB: You can now view the updated (as of 2.0.40b4) code.

The code below is that used to add the -f switch functionality, which allows users to pass the path to a text file, the contents of which are read as the tag value.

I would be very interested to hear about improvements to this code. Email address is on the homepage.

NB: The carriage return bit is used to insert a carriage return (13) in before any line feeds (10) that are found (without a preceding carriage return). I don't understand the ins and outs, but before I added this foobar was listing the value all nasty. I don't understand why there are no carriage returns when I read the file - maybe someone can explain.

Obviously the variable new_argv[i] contains the parameter, e.g.: "cuesheet=C:\CDImage.ape.cue"

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char *t;
size_t itemlen;
FILE* stream;

int ch;
char filearg[10240];
int j;

int cr;

// other stuff here
(removed)

// get filename and length of tag name
t = strchr ( new_argv[i], '=' ) + 1;

// get length of tag name
itemlen = t - new_argv[i] - 1;

// check file exists
if ( (stream = fopen ( t, "rt" ) ) == NULL ) {

	fprintf ( stderr, "%s: failed to open file for for reading.\n", t );
	return 1;
}

//set filearg to "<tag>="
strncpy(filearg, new_argv[i], itemlen + 1);

// start filling char array after "="
j = (int) itemlen + 1;

// read text from file (up to 10240 chars)
while ( ((ch = fgetc (stream)) != EOF ) && ( j < 10238 ) ) {

	//if character is line feed and last character wasn't a carriage return
	if ( ch == 10 && !cr ) {
		// add carriage return before line feed
		filearg[j] = (char)13;
		j++;
	// if character is carriage return set cr flag
	} else if ( ch == 13 ) {
		cr = 1;
	// otherwise reset flag
	} else {
		cr = 0;
	}

	// add character to array
	filearg[j] = (char)ch;
	j++;
}

// terminate will null char
filearg[j] = '\0';

// close stream
fclose (stream);

// append to collection of tags
(removed)

// release array
free ( filearg );

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