void Crypt::ComputeMD5(unsigned char digest[16], void const* bytesIn, unsigned int inputLen)
{
MD5 md5;
MD5Open(&md5);
MD5Digest(&md5, bytesIn, inputLen);
MD5Close(&md5, digest);
}
/* return true if digest calculated */
int get_file_digest(const char * filename, Uint8 digest[16])
{
MD5 md5;
el_file_ptr file = NULL;
file = el_open(filename);
memset (digest, 0, 16);
if (file == NULL)
{
LOG_ERROR("MD5Digest: Unable to open %s (%d)", filename, errno);
return 0;
}
if (el_get_pointer(file) == NULL)
{
el_close(file);
return 0;
}
MD5Open(&md5);
MD5Digest(&md5, el_get_pointer(file), el_get_size(file));
MD5Close(&md5, digest);
el_close(file);
return 1;
}
float get_bag_tilt(float pos_x, float pos_y, int bag_id, int map_x, int map_y)
{
char str[64];
MD5 md5;
Uint8 digest[16];
memset(digest, 0, 16);
safe_snprintf(str, 40, "%f%f%f%f%f", pos_x, pos_y, (float) bag_id,
(float) map_x, (float) map_y);
MD5Open(&md5);
MD5Digest(&md5, str, strlen(str));
MD5Close(&md5, digest);
// the sum of 5 cos operations can be between -5 and +5
// normalize them to -1.0 ... +1.0
// multiply with 15 (-15.0 ... +15.0 degrees)
return ((cosf(digest[3]) + cosf(digest[4]) + cosf(digest[5]) + cosf(
digest[6]) + cosf(digest[7])) / 5.0f) * 30;
}
float get_bag_rotation(float pos_x, float pos_y, int bag_id, int map_x, int map_y)
{
char str[64];
MD5 md5;
Uint8 digest[16];
memset(digest, 0, 16);
safe_snprintf(str, 40, "%f%f%f%f%f", pos_x, pos_y, (float) bag_id,
(float) map_x, (float) map_y);
MD5Open(&md5);
MD5Digest(&md5, str, strlen(str));
MD5Close(&md5, digest);
// the sum of 5 sin operations can be between -5 and +5
// normalize them to -0.5 ... +0.5
// multiply with 360 (-180.0 ... +180.0 degrees)
return ((sinf(digest[2]) + sinf(digest[3]) + sinf(digest[4]) + sinf(
digest[5]) + sinf(digest[6])) / 10.0f) * 360;
}
void MD5Sum::clear()
{
MD5Open(&md5_);
}
