1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* To avoid many issues, always build this as a Unicode program */ 30 #define UNICODE 1 31 #define _UNICODE 1 32 #include <windows.h> 33 #include <tchar.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 37 /* A brain-dead 'cmp' toolbox program for Windows, because comp.exe 38 * can't be silenced and doesn't return meaningful status code 39 */ 40 41 int main(void) 42 { 43 int argc; 44 TCHAR** argv = CommandLineToArgvW(GetCommandLine(), &argc); 45 46 /* IMPORTANT: cmp only accepts optional -s as the first option, followed by two file 47 * name. Note that regardless "-s" this cmp always operate in silent mode 48 */ 49 if (argc > 1 && argv[1][0] == L'-' && argv[1][1] == L's' && argv[1][2] == L'\0') { 50 argc--; 51 argv++; 52 } 53 if (argc != 3) { 54 _tprintf(L"Usage: cmp [-s] file1 file2\n"); 55 exit(1); 56 } 57 FILE *f1 = _tfopen(argv[1], L"rb"); 58 if (!f1) { 59 _tprintf(L"ERROR: can't open file %s\n", argv[1]); 60 exit(1); 61 } 62 FILE *f2 = _tfopen(argv[2], L"rb"); 63 if (!f2) { 64 _tprintf(L"ERROR: can't open file %s\n", argv[2]); 65 fclose(f1); 66 exit(1); 67 } 68 #define BUFSIZE 4096 69 char buf1[BUFSIZE], buf2[BUFSIZE]; 70 int n1, n2, ret = 0; 71 do { 72 n1 = fread(buf1, 1, BUFSIZE, f1); 73 n2 = fread(buf2, 1, BUFSIZE, f2); 74 ret = (n1 != n2) || memcmp(buf1, buf2, n1) != 0; 75 } while (!ret && n1 == BUFSIZE); 76 fclose(f1); 77 fclose(f2); 78 79 return ret; 80 } 81
