ref: 5104934135feec1bfb2c1543028fe40bb4a41573
dir: /sys/src/libmp/port/letomp.c/
#include "os.h" #include <mp.h> #include "dat.h" // convert a little endian byte array (least significant byte first) to an mpint mpint* letomp(uchar *s, uint n, mpint *b) { int i=0, m = 0; mpdigit x=0; if(b == nil){ b = mpnew(0); setmalloctag(b, getcallerpc(&s)); } mpbits(b, 8*n); for(; n > 0; n--){ x |= ((mpdigit)(*s++)) << i; i += 8; if(i == Dbits){ b->p[m++] = x; i = 0; x = 0; } } if(i > 0) b->p[m++] = x; b->top = m; b->sign = 1; return mpnorm(b); }