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libmp: simplify mpnrand(), as mpnew() cannot return nil

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This commit is contained in:
cinap_lenrek 2015-08-26 05:44:26 +02:00
parent 8f2e408448
commit 844bbecadb
1 changed files with 1 additions and 6 deletions
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7
sys/src/libmp/port/mpnrand.c
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@ -13,16 +13,11 @@ mpnrand(mpint *n, void (*gen)(uchar*, int), mpint *b)
/* m = 2^bits - 1 */ /* m = 2^bits - 1 */
bits = mpsignif(n); bits = mpsignif(n);
m = mpnew(bits+1); m = mpnew(bits+1);
if(m == nil)
sysfatal("mpnrand: %r");
mpleft(mpone, bits, m); mpleft(mpone, bits, m);
mpsub(m, mpone, m); mpsub(m, mpone, m);
if(b == nil){ if(b == nil)
b = mpnew(bits); b = mpnew(bits);
if(b == nil)
sysfatal("mpnrand: %r");
}
/* m = m - (m % n) */ /* m = m - (m % n) */
mpmod(m, n, b); mpmod(m, n, b);