tools/xway-swap-bytes.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5
   6 #ifndef BUFSIZ
   7 # define BUFSIZ 4096
   8 #endif
   9
  10 #undef BUFSIZ
  11 # define BUFSIZ 64
  12 int main (void)
  13 {
  14         short ibuff[BUFSIZ], obuff[BUFSIZ];
  15         int rc, i, len;
  16
  17         while ((rc = read (0, ibuff, sizeof (ibuff))) > 0) {
  18                 memset (obuff, 0, sizeof (obuff));
  19                 for (i = 0; i < (rc + 1) / 2; i++) {
  20                         obuff[i] = ibuff[i ^ 1];
  21                 }
  22
  23                 len = (rc + 1) & ~1;
  24
  25                 if (write (1, obuff, len) != len) {
  26                         perror ("read error");
  27                         return (EXIT_FAILURE);
  28                 }
  29
  30                 memset (ibuff, 0, sizeof (ibuff));
  31         }
  32
  33         if (rc < 0) {
  34                 perror ("read error");
  35                 return (EXIT_FAILURE);
  36         }
  37         return (EXIT_SUCCESS);
  38 }