void bn_closure(IplImage* img,int n) { bn_reverse(img); cvDilate(img,img,NULL,n); cvErode(img,img,NULL,n); bn_reverse(img); }
/* store in unsigned [big endian] format */ int mp_to_unsigned_bin (mp_int * a, unsigned char *b) { int x, res; mp_int t; if ((res = mp_init_copy (&t, a)) != MP_OKAY) { return res; } x = 0; while (mp_iszero (&t) == 0) { #ifndef MP_8BIT b[x++] = (unsigned char) (t.dp[0] & 255); #else b[x++] = (unsigned char) (t.dp[0] | ((t.dp[1] & 0x01) << 7)); #endif if ((res = mp_div_2d (&t, 8, &t, NULL)) != MP_OKAY) { mp_clear (&t); return res; } } bn_reverse (b, x); mp_clear (&t); return MP_OKAY; }
/* stores a bignum as a ASCII string in a given radix (2..64) */ int mp_toradix(mp_int * a, char *str, int radix) { int res, digs; mp_int t; mp_digit d; char *_s = str; if (radix < 2 || radix > 64) { return MP_VAL; } /* quick out if its zero */ if (mp_iszero(a) == 1) { *str++ = '0'; *str = '\0'; return MP_OKAY; } if ((res = mp_init_copy(&t, a)) != MP_OKAY) { return res; } /* if it is negative output a - */ if (t.sign == MP_NEG) { ++_s; *str++ = '-'; t.sign = MP_ZPOS; } digs = 0; while (mp_iszero(&t) == 0) { if ((res = mp_div_d(&t, (mp_digit) radix, &t, &d)) != MP_OKAY) { mp_clear(&t); return res; } *str++ = mp_s_rmap[d]; ++digs; } /* reverse the digits of the string. In this case _s points * to the first digit [exluding the sign] of the number] */ bn_reverse((unsigned char *) _s, digs); /* append a NULL so the string is properly terminated */ *str++ = '\0'; mp_clear(&t); return MP_OKAY; }
/* stores a bignum as a ASCII string in a given radix (2..64) * * Stores upto maxlen-1 chars and always a NULL byte */ int mp_toradix_n(mp_int * a, char *str, int radix, int maxlen) { int res, digs; mp_int t; mp_digit d; char *_s = str; /* check range of the maxlen, radix */ if (maxlen < 2 || radix < 2 || radix > 64) { return MP_VAL; } /* quick out if its zero */ if (mp_iszero(a) == MP_YES) { *str++ = '0'; *str = '\0'; return MP_OKAY; } if ((res = mp_init_copy (&t, a)) != MP_OKAY) { return res; } /* if it is negative output a - */ if (t.sign == MP_NEG) { /* we have to reverse our digits later... but not the - sign!! */ ++_s; /* store the flag and mark the number as positive */ *str++ = '-'; t.sign = MP_ZPOS; /* subtract a char */ --maxlen; } digs = 0; while (mp_iszero (&t) == 0) { if (--maxlen < 1) { /* no more room */ break; } if ((res = mp_div_d (&t, (mp_digit) radix, &t, &d)) != MP_OKAY) { mp_clear (&t); return res; } *str++ = mp_s_rmap[d]; ++digs; } /* reverse the digits of the string. In this case _s points * to the first digit [exluding the sign] of the number */ bn_reverse ((unsigned char *)_s, digs); /* append a NULL so the string is properly terminated */ *str = '\0'; mp_clear (&t); return MP_OKAY; }