289 lines
6.9 KiB
C
289 lines
6.9 KiB
C
/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Case Larsen.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#if 0
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#ifndef lint
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static char sccsid[] = "From: @(#)comm.c 8.4 (Berkeley) 5/4/95";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <limits.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <wchar.h>
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#include <wctype.h>
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#define MAXLINELEN (LINE_MAX + 1)
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const wchar_t *tabs[] = { L"", L"\t", L"\t\t" };
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FILE *file(const char *);
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wchar_t *getline(wchar_t *, size_t *, FILE *);
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void show(FILE *, const char *, const wchar_t *, wchar_t *, size_t *);
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int wcsicoll(const wchar_t *, const wchar_t *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int comp, read1, read2;
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int ch, flag1, flag2, flag3, iflag;
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FILE *fp1, *fp2;
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const wchar_t *col1, *col2, *col3;
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size_t line1len, line2len;
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wchar_t *line1, *line2;
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const wchar_t **p;
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flag1 = flag2 = flag3 = 1;
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iflag = 0;
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line1len = MAXLINELEN;
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line2len = MAXLINELEN;
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line1 = malloc(line1len * sizeof(*line1));
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line2 = malloc(line2len * sizeof(*line2));
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if (line1 == NULL || line2 == NULL)
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err(1, "malloc");
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(void) setlocale(LC_ALL, "");
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while ((ch = getopt(argc, argv, "123i")) != -1)
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switch(ch) {
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case '1':
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flag1 = 0;
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break;
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case '2':
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flag2 = 0;
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break;
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case '3':
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flag3 = 0;
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break;
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case 'i':
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iflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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fp1 = file(argv[0]);
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fp2 = file(argv[1]);
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/* for each column printed, add another tab offset */
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p = tabs;
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col1 = col2 = col3 = NULL;
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if (flag1)
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col1 = *p++;
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if (flag2)
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col2 = *p++;
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if (flag3)
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col3 = *p;
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for (read1 = read2 = 1;;) {
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/* read next line, check for EOF */
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if (read1) {
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line1 = getline(line1, &line1len, fp1);
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if (line1 == NULL && ferror(fp1))
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err(1, "%s", argv[0]);
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}
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if (read2) {
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line2 = getline(line2, &line2len, fp2);
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if (line2 == NULL && ferror(fp2))
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err(1, "%s", argv[1]);
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}
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/* if one file done, display the rest of the other file */
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if (line1 == NULL) {
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if (line2 != NULL && col2 != NULL)
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show(fp2, argv[1], col2, line2, &line2len);
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break;
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}
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if (line2 == NULL) {
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if (line1 != NULL && col1 != NULL)
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show(fp1, argv[0], col1, line1, &line1len);
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break;
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}
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/* lines are the same */
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if(iflag)
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comp = wcsicoll(line1, line2);
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else
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comp = wcscoll(line1, line2);
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if (!comp) {
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read1 = read2 = 1;
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if (col3 != NULL)
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(void)printf("%ls%ls", col3, line1);
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continue;
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}
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/* lines are different */
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if (comp < 0) {
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read1 = 1;
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read2 = 0;
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if (col1 != NULL)
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(void)printf("%ls%ls", col1, line1);
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} else {
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read1 = 0;
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read2 = 1;
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if (col2 != NULL)
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(void)printf("%ls%ls", col2, line2);
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}
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}
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exit(0);
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}
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wchar_t *
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getline(wchar_t *buf, size_t *buflen, FILE *fp)
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{
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size_t bufpos;
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wint_t ch;
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bufpos = 0;
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do {
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if ((ch = getwc(fp)) != WEOF) {
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if (bufpos + 2 >= *buflen) {
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*buflen = *buflen * 2;
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buf = reallocf(buf, *buflen * sizeof(*buf));
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if (buf == NULL)
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return (NULL);
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}
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buf[bufpos++] = ch;
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}
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} while (ch != WEOF && ch != '\n');
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if (bufpos + 1 != *buflen)
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buf[bufpos] = '\0';
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return (bufpos != 0 || ch == '\n' ? buf : NULL);
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}
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void
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show(FILE *fp, const char *fn, const wchar_t *offset, wchar_t *buf, size_t *buflen)
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{
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do {
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(void)printf("%ls%ls", offset, buf);
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} while ((buf = getline(buf, buflen, fp)) != NULL);
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if (ferror(fp))
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err(1, "%s", fn);
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}
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FILE *
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file(const char *name)
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{
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FILE *fp;
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if (!strcmp(name, "-"))
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return (stdin);
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if ((fp = fopen(name, "r")) == NULL) {
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err(1, "%s", name);
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}
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return (fp);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: comm [-123i] file1 file2\n");
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exit(1);
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}
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static size_t wcsicoll_l1_buflen = 0, wcsicoll_l2_buflen = 0;
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static wchar_t *wcsicoll_l1_buf = NULL, *wcsicoll_l2_buf = NULL;
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int
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wcsicoll(const wchar_t *s1, const wchar_t *s2)
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{
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wchar_t *p;
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size_t l1, l2;
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size_t new_l1_buflen, new_l2_buflen;
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l1 = wcslen(s1) + 1;
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l2 = wcslen(s2) + 1;
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new_l1_buflen = wcsicoll_l1_buflen;
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new_l2_buflen = wcsicoll_l2_buflen;
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while (new_l1_buflen < l1) {
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if (new_l1_buflen == 0)
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new_l1_buflen = MAXLINELEN;
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else
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new_l1_buflen *= 2;
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}
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while (new_l2_buflen < l2) {
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if (new_l2_buflen == 0)
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new_l2_buflen = MAXLINELEN;
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else
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new_l2_buflen *= 2;
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}
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if (new_l1_buflen > wcsicoll_l1_buflen) {
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wcsicoll_l1_buf = reallocf(wcsicoll_l1_buf, new_l1_buflen * sizeof(*wcsicoll_l1_buf));
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if (wcsicoll_l1_buf == NULL)
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err(1, "reallocf");
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wcsicoll_l1_buflen = new_l1_buflen;
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}
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if (new_l2_buflen > wcsicoll_l2_buflen) {
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wcsicoll_l2_buf = reallocf(wcsicoll_l2_buf, new_l2_buflen * sizeof(*wcsicoll_l2_buf));
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if (wcsicoll_l2_buf == NULL)
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err(1, "reallocf");
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wcsicoll_l2_buflen = new_l2_buflen;
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}
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for (p = wcsicoll_l1_buf; *s1; s1++)
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*p++ = towlower(*s1);
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*p = '\0';
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for (p = wcsicoll_l2_buf; *s2; s2++)
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*p++ = towlower(*s2);
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*p = '\0';
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return (wcscoll(wcsicoll_l1_buf, wcsicoll_l2_buf));
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}
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