core/vil1: core/vil1/vil1_byte_swap.cxx Source File

00001 // This is core/vil1/vil1_byte_swap.cxx
00002 #ifdef VCL_NEEDS_PRAGMA_INTERFACE
00003 #pragma implementation
00004 #endif
00005 //:
00006 // \file
00007 // \author fsm
00008 
00009 #include "vil1_byte_swap.h"
00010 #include <vcl_cassert.h>
00011 
00012 // this is not efficient
00013 void vil1_byte_swap(void *b_, void *e_) {
00014   char *b = static_cast<char*>(b_);
00015   char *e = static_cast<char*>(e_);
00016   assert(b < e);
00017   unsigned long n = e-b;
00018   for (unsigned long i=0; i<n/2; ++i) {
00019     char tmp = b[i];
00020     b[i] = b[n-1-i];
00021     b[n-1-i] = tmp;
00022   }
00023 }