ref: a69ae5ed2a33e8d1a62391e57347285228ba4054
dir: /3rd/mp/mptobe.c/
#include "platform.h" // convert an mpint into a big endian byte array (most significant byte first; left adjusted) // return number of bytes converted // if p == nil, allocate and result array int mptobe(mpint *b, uint8_t *p, uint32_t n, uint8_t **pp) { uint32_t m; m = (mpsignif(b)+7)/8; if(m == 0) m++; if(p == nil){ n = m; p = MEM_ALLOC(n); if(p == nil){ fprintf(stderr, "mptobe: no memory\n"); exit(2); } } else { if(n < m) return -1; if(n > m) memset(p+m, 0, n-m); } if(pp != nil) *pp = p; mptober(b, p, m); return m; }