diff options
Diffstat (limited to 'tools/xway-swap-bytes.c')
-rw-r--r-- | tools/xway-swap-bytes.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/tools/xway-swap-bytes.c b/tools/xway-swap-bytes.c new file mode 100644 index 0000000..3a6d82d --- /dev/null +++ b/tools/xway-swap-bytes.c @@ -0,0 +1,38 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#ifndef BUFSIZ +# define BUFSIZ 4096 +#endif + +#undef BUFSIZ +# define BUFSIZ 64 +int main (void) +{ + short ibuff[BUFSIZ], obuff[BUFSIZ]; + int rc, i, len; + + while ((rc = read (0, ibuff, sizeof (ibuff))) > 0) { + memset (obuff, 0, sizeof (obuff)); + for (i = 0; i < (rc + 1) / 2; i++) { + obuff[i] = ibuff[i ^ 1]; + } + + len = (rc + 1) & ~1; + + if (write (1, obuff, len) != len) { + perror ("read error"); + return (EXIT_FAILURE); + } + + memset (ibuff, 0, sizeof (ibuff)); + } + + if (rc < 0) { + perror ("read error"); + return (EXIT_FAILURE); + } + return (EXIT_SUCCESS); +} |