tletomp.c - plan9port - [fork] Plan 9 from user space
  HTML git clone git://src.adamsgaard.dk/plan9port
   DIR Log
   DIR Files
   DIR Refs
   DIR README
   DIR LICENSE
       ---
       tletomp.c (435B)
       ---
            1 #include "os.h"
            2 #include <mp.h>
            3 #include "dat.h"
            4 
            5 /* convert a little endian byte array (least significant byte first) to an mpint */
            6 mpint*
            7 letomp(uchar *s, uint n, mpint *b)
            8 {
            9         int i=0, m = 0;
           10         mpdigit x=0;
           11 
           12         if(b == nil)
           13                 b = mpnew(0);
           14         mpbits(b, 8*n);
           15         for(; n > 0; n--){
           16                 x |= ((mpdigit)(*s++)) << i;
           17                 i += 8;
           18                 if(i == Dbits){
           19                         b->p[m++] = x;
           20                         i = 0;
           21                         x = 0;
           22                 }
           23         }
           24         if(i > 0)
           25                 b->p[m++] = x;
           26         b->top = m;
           27         return b;
           28 }