From b3f61791f1e9095ce8ae9c6d6415b4ee94e2f7eb Mon Sep 17 00:00:00 2001 From: rsc Date: Sun, 21 Mar 2004 14:06:38 +0000 Subject: Add libmp. --- src/libmp/port/mptoi.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/libmp/port/mptoi.c (limited to 'src/libmp/port/mptoi.c') diff --git a/src/libmp/port/mptoi.c b/src/libmp/port/mptoi.c new file mode 100644 index 00000000..b3f22b42 --- /dev/null +++ b/src/libmp/port/mptoi.c @@ -0,0 +1,46 @@ +#include "os.h" +#include +#include "dat.h" + +/* + * this code assumes that mpdigit is at least as + * big as an int. + */ + +mpint* +itomp(int i, mpint *b) +{ + if(b == nil) + b = mpnew(0); + mpassign(mpzero, b); + if(i != 0) + b->top = 1; + if(i < 0){ + b->sign = -1; + *b->p = -i; + } else + *b->p = i; + return b; +} + +int +mptoi(mpint *b) +{ + uint x; + + if(b->top==0) + return 0; + x = *b->p; + if(b->sign > 0){ + if(b->top > 1 || (x > MAXINT)) + x = (int)MAXINT; + else + x = (int)x; + } else { + if(b->top > 1 || x > MAXINT+1) + x = (int)MININT; + else + x = -(int)x; + } + return x; +} -- cgit v1.2.3