mpd/src/buffer2array.c

/* 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 "buffer2array.h"
#ifdef UNIT_TEST
#  define xstrdup(x) strdup(x)
#  define xmalloc(x) malloc(x)
#else
#  include "utils.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int buffer2array(char *origBuffer, char ***array)
{
	int quotes = 0;
	int count = 0;
	int i;
	int curr;
	int *beginArray;
	char *buffer = xstrdup(origBuffer);
	int bufferLength = strlen(buffer);
	char *markArray = xmalloc(sizeof(char) * (bufferLength + 1));

	for (curr = 0; curr < bufferLength; curr++) {
		if (!quotes && (buffer[curr] == ' ' || buffer[curr] == '\t')) {
			markArray[curr] = '0';
		} else if (buffer[curr] == '\"') {
			if (curr > 0 && buffer[curr - 1] != '\\') {
				quotes = quotes ? 0 : 1;
				markArray[curr] = '0';
			} else {
				markArray[curr] = '1';
			}
		} else {
			markArray[curr] = '1';
		}
		if (markArray[curr] == '1') {
			if (curr > 0) {
				if (markArray[curr - 1] == '0') {
					count++;
				}
			} else {
				count++;
			}
		}
	}
	markArray[bufferLength] = '\0';

	if (!count) {
		free(buffer);
		free(markArray);
		return count;
	}

	beginArray = xmalloc(sizeof(int) * count);
	(*array) = xmalloc(sizeof(char *) * count);

	count = 0;

	for (curr = 0; curr < bufferLength; curr++) {
		if (markArray[curr] == '1') {
			if (curr > 0) {
				if (markArray[curr - 1] == '0') {
					beginArray[count++] = curr;
				}
			} else {
				beginArray[count++] = curr;
			}
		} else {
			buffer[curr] = '\0';
		}
	}

	for (i = 0; i < count; i++) {
		int len = strlen(buffer + beginArray[i]) + 1;
		int arrayCurr = 0;
		(*array)[i] = xmalloc(sizeof(char) * len);
		for (curr = beginArray[i]; buffer[curr] != '\0'; curr++) {
			if (buffer[curr] == '\\') {
				if (buffer[curr + 1] != '\0') {
					curr++;
				}
			}
			(*array)[i][arrayCurr++] = buffer[curr];
		}
		(*array)[i][arrayCurr] = '\0';
	}

	free(markArray);
	free(beginArray);
	free(buffer);

	return count;
}

void freeArgArray(char **array, int argArrayLength)
{
	int i;

	if (argArrayLength == 0)
		return;

	for (i = 0; i < argArrayLength; i++) {
		free(array[i]);
	}
	free(array);
}

#ifdef UNIT_TEST

#include <stdio.h>
#include <string.h>
#include <assert.h>

int main()
{
	char **a;
	char *b;
	int i, max;

	b = xstrdup("lsinfo \"/some/dir/name \\\"test\\\"\"");
	max = buffer2array(b, &a);
	assert( !strcmp("lsinfo", a[0]) );
	assert( !strcmp("/some/dir/name \"test\"", a[1]) );
	assert( !a[2] );

	b = xstrdup("lsinfo \"/some/dir/name \\\"test\\\" something else\"");
	max = buffer2array(b, &a);
	assert( !strcmp("lsinfo", a[0]) );
	assert( !strcmp("/some/dir/name \"test\" something else", a[1]) );
	assert( !a[2] );

	b = xstrdup("lsinfo \"/some/dir\\\\name\"");
	max = buffer2array(b, &a);
	assert( !strcmp("lsinfo", a[0]) );
	assert( !strcmp("/some/dir\\name", a[1]) );
	assert( !a[2] );

	b = xstrdup("lsinfo \"/some/dir name\"");
	max = buffer2array(b, &a);
	assert( !strcmp("lsinfo", a[0]) );
	assert( !strcmp("/some/dir name", a[1]) );
	assert( !a[2] );

	b = xstrdup("lsinfo \"\\\"/some/dir\\\"\"");
	max = buffer2array(b, &a);
	assert( !strcmp("lsinfo", a[0]) );
	assert( !strcmp("\"/some/dir\"", a[1]) );
	assert( !a[2] );

	b = xstrdup("lsinfo \"\\\"/some/dir\\\" x\"");
	max = buffer2array(b, &a);
	assert( !strcmp("lsinfo", a[0]) );
	assert( !strcmp("\"/some/dir\" x", a[1]) );
	assert( !a[2] );

	return 0;
}

#endif