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man:bswap_16

BSWAP(3) Linux Programmer's Manual BSWAP(3)

NAME

     bswap_16, bswap_32, bswap_64 - reverse order of bytes

SYNOPSIS

     #include <byteswap.h>
     bswap_16(x);
     bswap_32(x);
     bswap_64(x);

DESCRIPTION

     These  macros  return  a value in which the order of the bytes in their
     2-, 4-, or 8-byte arguments is reversed.

RETURN VALUE

     These macros  return  the  value  of  their  argument  with  the  bytes
     reversed.

ERRORS

     These macros always succeed.

CONFORMING TO

     These macros are GNU extensions.

EXAMPLE

     The program below swaps the bytes of the 8-byte integer supplied as its
     command-line argument.  The following shell  session  demonstrates  the
     use of the program:
         $      ./a.out     0x0123456789abcdef     0x123456789abcdef     ==>
         0xefcdab8967452301
 Program source
      #include <stdio.h> #include <stdint.h>  #include  <stdlib.h>  #include
     <inttypes.h> #include <byteswap.h>
     int main(int argc, char *argv[]) {
         uint64_t x;
         if (argc != 2) {
             fprintf(stderr, "Usage: %s <num>\n", argv[0]);
             exit(EXIT_FAILURE);
         }
         x = strtoul(argv[1], NULL, 0);
         printf("0x%" PRIx64 " ==> 0x%" PRIx64 "\n", x, bswap_64(x));
         exit(EXIT_SUCCESS); }

SEE ALSO

     byteorder(3), endian(3)

COLOPHON

     This  page  is  part of release 4.16 of the Linux man-pages project.  A
     description of the project, information about reporting bugs,  and  the
     latest     version     of     this    page,    can    be    found    at
     https://www.kernel.org/doc/man-pages/.

Linux 2017-09-15 BSWAP(3)

/data/webs/external/dokuwiki/data/pages/man/bswap_16.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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