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Location: cpp/openttd-patchpack/source/src/endian_check.cpp

r7882:cdf03a4ac84a 1.7 KiB text/x-c Show Annotation Show as Raw Download as Raw

rubidium

(svn r11433) -Fix: starting OpenTTD with DOS files made it look weird out of the box.
-Change: make extra sprites (the ones not in the TTD GRFs) replaceable using Action 5.
-Feature: make replacing contiguous subsets of sprites in for some types possible in Action 5.
Note to GRF authors: when you replaced OpenTTD sprites that are not from the TTD GRF files using Action A, your GRF will not have the intended result anymore as the sprite numbers have changed. You should replace the Action A with an Action 5 from now on.

/* $Id$ */

/** @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 endian_test[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) {
		/* 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*)endian_test == 1 ) {
		printf("#define TTD_LITTLE_ENDIAN\n");
	} else {
		printf("#define TTD_BIG_ENDIAN\n");
	}
	printf("#endif\n");

	return 0;
}