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

#include "zpm.h"
#include "sha256.h"

int main(int ac, char **av){
	int rv;
	char hash[65];

	/*
	 * hash stdin
	 */
	if (ac == 1 || (ac == 2 && !strcmp(av[1], "-"))) {
		struct sha256_state md;
		unsigned char buf[4096];
		size_t bytes;
		unsigned char tmp[32];
		int j;

		sha256_init(&md);
		do {
			bytes = fread(buf, 1, sizeof buf, stdin);
			sha256_process(&md, buf, bytes);
		} while (bytes && !feof(stdin));
		if (ferror(stdin)) {
			exit(1);
		}
		sha256_done(&md, tmp);
		for (j=0;j<32;j++) {
			sprintf(hash+j*2, "%02x", (unsigned)tmp[j]);
		}
		hash[64] = 0;
		printf("%s\n", hash);
		return 0;
	}

	if (ac < 2) {
		fprintf(stderr, "usage: path\n");
		return 1;
	}
	rv = zpm_hash(av[1], hash, 0);
	if (rv) {
		printf("%s\n", hash);
	}

	return !rv;
}