#include "config.h"
#include <stdio.h>
#include <string.h>

/**
 * edit_distance - calculate the edit distance between two strings
 *
 * The edit distance quantifies the similarity between two strings based on the
 * number of modifications necessary to turn one string into the other.  There
 * are several edit distance measures which differ in the operations which are
 * permitted and the cost (aka weight) of the operations.  This module provides
 * functions for calculating the Longest Common Subsequence (LCS), Levenshtein,
 * and Damerau-Levenshtein (restricted and unrestricted) distances.  Weighted
 * versions of these functions can be created by defining cost functions as
 * preprocessor macros when compiling this module.  Distances over other array
 * types (e.g. wide strings, integers, structs) can be accomplished by defining
 * the element type and equality test macros.
 *
 * Example:
 * #include <limits.h>	// UINT_MAX
 * #include <stdio.h>	// fprintf, printf
 * #include <stdlib.h>	// EXIT_*
 * #include <string.h>	// strlen
 *
 * #include <ccan/edit_distance/edit_distance.h>
 *
 * const char *counties[] = {
 *	"Anglesey",
 *	"Brecknockshire",
 *	"Cardiganshire",
 *	"Carmarthenshire",
 *	"Caernarfonshire",
 *	"Denbighshire",
 *	"Flintshire",
 *	"Glamorgan",
 *	"Merionethshire",
 *	"Monmouthshire",
 *	"Montgomeryshire",
 *	"Pembrokeshire",
 *	"Radnorshire",
 *	NULL
 * };
 *
 * int main(int argc, char *argv[])
 * {
 *	if (argc != 2) {
 *		fprintf(stderr, "Usage: %s <guess>\n", argv[0]);
 *		return EXIT_FAILURE;
 *	}
 *	const char *guess = argv[1];
 *
 *	unsigned int bestdist = UINT_MAX;
 *	const char *bestcounty = NULL;
 *	for (const char **pcounty = counties; *pcounty; ++pcounty) {
 *		const char *county = *pcounty;
 *		unsigned int dist = edit_distance(guess, strlen(guess),
 *				county, strlen(county), EDIT_DISTANCE_RDL);
 *		if (dist < bestdist) {
 *			bestdist = dist;
 *			bestcounty = county;
 *		}
 *	}
 *
 *	printf("You were probably trying to spell %s\n", bestcounty);
 *	return EXIT_SUCCESS;
 * }
 * License: MIT
 * Author: Kevin Locke <kevin@kevinlocke.name>
 */
int main(int argc, char *argv[])
{
	/* Expect exactly one argument */
	if (argc != 2) {
		return 1;
        }

	if (strcmp(argv[1], "depends") == 0) {
		return 0;
        }

	if (strcmp(argv[1], "testdepends") == 0) {
		printf("ccan/array_size\n");
		printf("ccan/build_assert\n");
		printf("ccan/tap\n");
		return 0;
	}

	return 1;
}