RTL-lwIP-0.4: htonl.c Source File

00001 /*
00002  * Written by J.T. Conklin .
00003  * Public domain.
00004  *
00005  * CHANGELOG: this file has been modified by Sergio Perez Alcañiz <serpeal@disca.upv.es> 
00006  *            Departamento de Informática de Sistemas y Computadores          
00007  *            Universidad Politécnica de Valencia                             
00008  *            Valencia (Spain)    
00009  *            Date: March 2003                                          
00010  *            
00011  */
00012 
00013 #include  <sys/types.h>
00014 #include <rtl_sched.h>
00015 #undef htonl
00016 
00017 /*  */
00018 /* htonl */
00019 in_addr_t htonl(in_addr_t x)
00020 {
00021 #if BYTE_ORDER == LITTLE_ENDIAN
00022         u_char *s = (u_char *)&x;
00023         return (in_addr_t)(s[0] << 24 | s[1] << 16 | s[2] << 8 | s[3]);
00024 #else
00025         return x;
00026 #endif
00027 }