mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-16 00:12:51 +00:00
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
/* $Id$ */
|
|
|
|
/** @file endian_check.cpp
|
|
* This pretty simple file checks if the system is LITTLE_ENDIAN or BIG_ENDIAN
|
|
* it does that by putting a 1 and a 0 in an array, and read it out as one
|
|
* number. If it is 1, it is LITTLE_ENDIAN, if it is 256, it is BIG_ENDIAN
|
|
*
|
|
* After that it outputs the contents of an include files (endian.h)
|
|
* that says or TTD_LITTLE_ENDIAN, or TTD_BIG_ENDIAN. Makefile takes
|
|
* care of the real writing to the file. */
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
/** Main call of the endian_check program
|
|
* @param argc argument count
|
|
* @param argv arguments themselves
|
|
* @return exit code */
|
|
int main (int argc, char *argv[]) {
|
|
unsigned char EndianTest[2] = { 1, 0 };
|
|
int force_BE = 0, force_LE = 0, force_PREPROCESSOR = 0;
|
|
|
|
if (argc > 1 && strcmp(argv[1], "BE") == 0)
|
|
force_BE = 1;
|
|
if (argc > 1 && strcmp(argv[1], "LE") == 0)
|
|
force_LE = 1;
|
|
if (argc > 1 && strcmp(argv[1], "PREPROCESSOR") == 0)
|
|
force_PREPROCESSOR = 1;
|
|
|
|
printf("#ifndef ENDIAN_H\n#define ENDIAN_H\n");
|
|
|
|
if (force_LE == 1) {
|
|
printf("#define TTD_LITTLE_ENDIAN\n");
|
|
} else {
|
|
if (force_BE == 1) {
|
|
printf("#define TTD_BIG_ENDIAN\n");
|
|
} else {
|
|
if (force_PREPROCESSOR == 1) {
|
|
/** adding support for universal binaries on OSX
|
|
* Universal binaries supports both PPC and x86
|
|
* If a compiler for OSX gets this setting, it will always pick the correct endian and no test is needed */
|
|
printf("#ifdef __BIG_ENDIAN__\n");
|
|
printf("#define TTD_BIG_ENDIAN\n");
|
|
printf("#else\n");
|
|
printf("#define TTD_LITTLE_ENDIAN\n");
|
|
printf("#endif\n");
|
|
} else {
|
|
if ( *(short *) EndianTest == 1 )
|
|
printf("#define TTD_LITTLE_ENDIAN\n");
|
|
else
|
|
printf("#define TTD_BIG_ENDIAN\n");
|
|
}
|
|
}
|
|
}
|
|
printf("#endif\n");
|
|
|
|
return 0;
|
|
}
|