diff options
| -rw-r--r-- | sys/src/libmp/port/mpnrand.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/sys/src/libmp/port/mpnrand.c b/sys/src/libmp/port/mpnrand.c index aa6a1e273..278547ca6 100644 --- a/sys/src/libmp/port/mpnrand.c +++ b/sys/src/libmp/port/mpnrand.c @@ -6,30 +6,18 @@ mpint* mpnrand(mpint *n, void (*gen)(uchar*, int), mpint *b) { - mpint *m; int bits; - /* m = 2^bits - 1 */ bits = mpsignif(n); - m = mpnew(bits+1); - mpleft(mpone, bits, m); - mpsub(m, mpone, m); - + if(bits == 0) + abort(); if(b == nil){ b = mpnew(bits); setmalloctag(b, getcallerpc(&n)); } - - /* m = m - (m % n) */ - mpmod(m, n, b); - mpsub(m, b, m); - do { mprand(bits, gen, b); - } while(mpcmp(b, m) >= 0); - - mpmod(b, n, b); - mpfree(m); + } while(mpmagcmp(b, n) >= 0); return b; } |