ccan/ccan/jmap/_info

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

/**
 * jmap - map from indices to values (based on libJudy)
 *
 * This provides a convenient wrapper for using JudyL arrays; using
 * integers or pointers as an index, Judy arrays provide an efficient
 * map to integers or pointers.
 *
 * jmap.h simply contains wrappers for a size_t-indexed size_t values, and
 * jmap_type.h contain a wrapper macro for size_t->pointer maps and pointer
 * ->pointer maps.
 *
 * Example:
 * // Silly example of associating data with arguments by pointer and int.
 * #include <string.h>
 * #include <stdio.h>
 * #include <ccan/jmap/jmap_type.h>
 * 
 * struct opt_detail {
 * 	bool is_long;
 * 	unsigned int length; // == 1 if !is_long.
 * };
 * 
 * // Define jmap_arg_<op> and jmap_arg, for int -> argv.
 * JMAP_DEFINE_UINTIDX_TYPE(char, arg);
 * // Define jmap_opt_<op> and jmap_opt, for argv -> struct opt_detail *.
 * JMAP_DEFINE_PTRIDX_TYPE(char, struct opt_detail, opt);
 * 
 * int main(int argc, char *argv[])
 * {
 * 	int i;
 * 	// This map is equivalent to the argv[] array.  Silly example.
 * 	struct jmap_arg *arg = jmap_arg_new();
 * 	struct jmap_opt *opt = jmap_opt_new();
 * 	struct opt_detail *d;
 * 
 * 	// Note: this is not correct for real parsing!
 * 	for (i = 0; i < argc; i++) {
 * 		jmap_arg_add(arg, i, argv[i]);
 * 		if (i < 1 || argv[i][0] != '-')
 * 			continue;
 * 		d = malloc(sizeof(*d));
 * 		if (argv[i][1] == '-') {
 * 			// --<stuff>
 * 			d->is_long = true;
 * 			d->length = strlen(argv[i]+2);
 * 		} else {
 * 			// -<opt1>
 * 			d->is_long = false;
 * 			d->length = 1;
 * 		}
 * 		jmap_opt_add(opt, argv[i], d);
 * 	}
 * 
 * 	printf("Found %lu options:\n", jmap_opt_count(opt));
 * 	for (i = jmap_arg_first(arg,-1); i!=-1; i = jmap_arg_next(arg,i,-1)) {
 * 		char *a = jmap_arg_get(arg, i);
 * 		d = jmap_opt_get(opt, a);
 * 		printf("  Arg %i ('%s') is a %s of %u chars\n",
 * 		       i, a,
 * 		       d == NULL ? "normal argument"
 * 		       : d->is_long ? "long option"
 * 		       : "short option",
 * 		       d == NULL ? strlen(a) : d->length);
 * 		// We no longer need it, so free it here.
 * 		free(d);
 * 	}
 * 	jmap_opt_free(opt);
 * 	jmap_arg_free(arg);
 * 	return 0;
 * }
 * 
 * License: LGPL (2 or any later version)
 * Author: Rusty Russell <rusty@rustcorp.com.au>
 */
int main(int argc, char *argv[])
{
	if (argc != 2)
		return 1;

	if (strcmp(argv[1], "depends") == 0) {
		printf("ccan/build_assert\n");
		printf("ccan/compiler\n");
		printf("Judy\n");
		return 0;
	}

	if (strcmp(argv[1], "libs") == 0) {
		printf("Judy\n");
		return 0;
	}

	return 1;
}