1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Case Larsen. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1989, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif 42 43 #if 0 44 #ifndef lint 45 static char sccsid[] = "From: @(#)comm.c 8.4 (Berkeley) 5/4/95"; 46 #endif 47 #endif 48 49 #include <sys/cdefs.h> 50 __FBSDID("$FreeBSD$"); 51 52 #include <err.h> 53 #include <limits.h> 54 #include <locale.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 #include <wchar.h> 60 #include <wctype.h> 61 62 #define MAXLINELEN (LINE_MAX + 1) 63 64 const wchar_t *tabs[] = { L"", L"\t", L"\t\t" }; 65 66 FILE *file(const char *); 67 void show(FILE *, const char *, const wchar_t *, wchar_t *); 68 int wcsicoll(const wchar_t *, const wchar_t *); 69 static void usage(void); 70 71 int 72 main(int argc, char *argv[]) 73 { 74 int comp, file1done = 0, file2done = 0, read1, read2; 75 int ch, flag1, flag2, flag3, iflag; 76 FILE *fp1, *fp2; 77 const wchar_t *col1, *col2, *col3; 78 wchar_t line1[MAXLINELEN], line2[MAXLINELEN]; 79 const wchar_t **p; 80 81 flag1 = flag2 = flag3 = 1; 82 iflag = 0; 83 84 (void) setlocale(LC_ALL, ""); 85 86 while ((ch = getopt(argc, argv, "123i")) != -1) 87 switch(ch) { 88 case '1': 89 flag1 = 0; 90 break; 91 case '2': 92 flag2 = 0; 93 break; 94 case '3': 95 flag3 = 0; 96 break; 97 case 'i': 98 iflag = 1; 99 break; 100 case '?': 101 default: 102 usage(); 103 } 104 argc -= optind; 105 argv += optind; 106 107 if (argc != 2) 108 usage(); 109 110 fp1 = file(argv[0]); 111 fp2 = file(argv[1]); 112 113 /* for each column printed, add another tab offset */ 114 p = tabs; 115 col1 = col2 = col3 = NULL; 116 if (flag1) 117 col1 = *p++; 118 if (flag2) 119 col2 = *p++; 120 if (flag3) 121 col3 = *p; 122 123 for (read1 = read2 = 1;;) { 124 /* read next line, check for EOF */ 125 if (read1) { 126 file1done = !fgetws(line1, MAXLINELEN, fp1); 127 if (file1done && ferror(fp1)) 128 err(1, "%s", argv[0]); 129 } 130 if (read2) { 131 file2done = !fgetws(line2, MAXLINELEN, fp2); 132 if (file2done && ferror(fp2)) 133 err(1, "%s", argv[1]); 134 } 135 136 /* if one file done, display the rest of the other file */ 137 if (file1done) { 138 if (!file2done && col2) 139 show(fp2, argv[1], col2, line2); 140 break; 141 } 142 if (file2done) { 143 if (!file1done && col1) 144 show(fp1, argv[0], col1, line1); 145 break; 146 } 147 148 /* lines are the same */ 149 if(iflag) 150 comp = wcsicoll(line1, line2); 151 else 152 comp = wcscoll(line1, line2); 153 154 if (!comp) { 155 read1 = read2 = 1; 156 if (col3) 157 (void)printf("%ls%ls", col3, line1); 158 continue; 159 } 160 161 /* lines are different */ 162 if (comp < 0) { 163 read1 = 1; 164 read2 = 0; 165 if (col1) 166 (void)printf("%ls%ls", col1, line1); 167 } else { 168 read1 = 0; 169 read2 = 1; 170 if (col2) 171 (void)printf("%ls%ls", col2, line2); 172 } 173 } 174 exit(0); 175 } 176 177 void 178 show(FILE *fp, const char *fn, const wchar_t *offset, wchar_t *buf) 179 { 180 181 do { 182 (void)printf("%ls%ls", offset, buf); 183 } while (fgetws(buf, MAXLINELEN, fp)); 184 if (ferror(fp)) 185 err(1, "%s", fn); 186 } 187 188 FILE * 189 file(const char *name) 190 { 191 FILE *fp; 192 193 if (!strcmp(name, "-")) 194 return (stdin); 195 if ((fp = fopen(name, "r")) == NULL) { 196 err(1, "%s", name); 197 } 198 return (fp); 199 } 200 201 static void 202 usage(void) 203 { 204 (void)fprintf(stderr, "usage: comm [-123i] file1 file2\n"); 205 exit(1); 206 } 207 208 int 209 wcsicoll(const wchar_t *s1, const wchar_t *s2) 210 { 211 wchar_t *p, line1[MAXLINELEN], line2[MAXLINELEN]; 212 213 for (p = line1; *s1; s1++) 214 *p++ = towlower(*s1); 215 *p = '\0'; 216 for (p = line2; *s2; s2++) 217 *p++ = towlower(*s2); 218 *p = '\0'; 219 return (wcscoll(line1, line2)); 220 } 221