src/sgemisc.c

/*
 * Copyright (c) 2007 Heiko Irrgang
 *
 * The license and distribution terms for this file may be
 * found in the file COPYING in this distribution or at
 * http://93-interactive.com/cms/products/software/sdl-game-engine/license/
 */

#include <sge.h>

int sgeGetDistance(int x, int y, int xx, int yy) {
        int distx=xx-x;
        int disty=yy-y;

        return (int) sgeRound(sqrt(distx*distx+disty*disty));
}

char *sgeMD5(const unsigned char *data, unsigned int datalen) {
        char *ret=NULL;
        int i;
        md5_state_t md5;
        md5_byte_t digest[16];

        md5_init(&md5);
        md5_append(&md5, (const md5_byte_t *)data, datalen);
        md5_finish(&md5, digest);

        sgeMalloc(ret, char, 33);
        for (i=0; i<16; i++) {
                sprintf(ret+i*2, "%0x", digest[i]);
        }
        return ret;
}

char *sgeSHA1(const unsigned char *data, unsigned int datalen) {
        char *ret=NULL;
        int i=0;
        SHA1Context sha;

        SHA1Reset(&sha);
        SHA1Input(&sha, data, datalen);
        SHA1Result(&sha);

        sgeMalloc(ret, char, 41);
        for (i=0; i<5; i++) {
                sprintf(ret+i*8, "%08x", sha.Message_Digest[i]);
        }
        return ret;
}