Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2
   3int main(int ac, char **av)
   4{
   5        SHA_CTX ctx;
   6        unsigned char sha1[20];
   7        unsigned bufsz = 8192;
   8        char *buffer;
   9
  10        if (ac == 2)
  11                bufsz = strtoul(av[1], NULL, 10) * 1024 * 1024;
  12
  13        if (!bufsz)
  14                bufsz = 8192;
  15
  16        while ((buffer = malloc(bufsz)) == NULL) {
  17                fprintf(stderr, "bufsz %u is too big, halving...\n", bufsz);
  18                bufsz /= 2;
  19                if (bufsz < 1024)
  20                        die("OOPS");
  21        }
  22
  23        SHA1_Init(&ctx);
  24
  25        while (1) {
  26                ssize_t sz, this_sz;
  27                char *cp = buffer;
  28                unsigned room = bufsz;
  29                this_sz = 0;
  30                while (room) {
  31                        sz = xread(0, cp, room);
  32                        if (sz == 0)
  33                                break;
  34                        if (sz < 0)
  35                                die("test-sha1: %s", strerror(errno));
  36                        this_sz += sz;
  37                        cp += sz;
  38                        room -= sz;
  39                }
  40                if (this_sz == 0)
  41                        break;
  42                SHA1_Update(&ctx, buffer, this_sz);
  43        }
  44        SHA1_Final(sha1, &ctx);
  45        puts(sha1_to_hex(sha1));
  46        exit(0);
  47}