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/*
* Copyright (C) 2011 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
/* A brain-dead 'cmp' toolbox program for Windows, because comp.exe
* can't be silenced and doesn't return meaningful status code
*/
int main(void)
{
int argc;
wchar_t** argv = CommandLineToArgvW(GetCommandLineW(), &argc);
// Discard the name of the executable.
if (argc > 0) {
argc--;
argv++;
}
// IMPORTANT: cmp only accepts optional -s as the first option, followed by two file
// name. Note that regardless of "-s" this cmp always operates in silent mode.
if (argc > 0 && !wcscmp(argv[0], L"-s")) {
argc--;
argv++;
}
if (argc != 2) {
wprintf(L"Usage: cmp [-s] file1 file2\n");
exit(1);
}
const wchar_t* filename1 = argv[0];
const wchar_t* filename2 = argv[1];
FILE *f1 = _wfopen(filename1, L"rb");
if (!f1) {
wprintf(L"ERROR: can't open file %ls\n", filename1);
exit(1);
}
FILE *f2 = _wfopen(filename2, L"rb");
if (!f2) {
wprintf(L"ERROR: can't open file %ls\n", filename2);
fclose(f1);
exit(1);
}
#define BUFSIZE 4096
char buf1[BUFSIZE], buf2[BUFSIZE];
int n1, n2, ret = 0;
do {
n1 = fread(buf1, 1, BUFSIZE, f1);
n2 = fread(buf2, 1, BUFSIZE, f2);
ret = (n1 != n2) || memcmp(buf1, buf2, n1) != 0;
} while (!ret && n1 == BUFSIZE);
fclose(f1);
fclose(f2);
return ret;
}
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