mdiff.c

这个是内存数据库中的一个管理工具

/*
 * The contents of this file are subject to the MonetDB Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://monetdb.cwi.nl/Legal/MonetDBLicense-1.1.html
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is the MonetDB Database System.
 *
 * The Initial Developer of the Original Code is CWI.
 * Portions created by CWI are Copyright (C) 1997-2007 CWI.
 * All Rights Reserved.
 */

#include <monetdb_config.h>

#include <stdlib.h>
#include <stdio.h>
#include "difflib.h"
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif
#include <string.h>

#include "monet_options.h"

static void
showUsage(char *name)
{
	printf("Usage:  %s [-I<exp>] [-C<num>] [-A<num>] [-t<text>] [-r<rev>] <oldfile> <newfile> [<outfile>]\n", name);
	printf("\n");
	printf(" -I<exp>   : ignore lines matching <exp> during diff (optional, default: -I'^#')\n");
	printf(" -C<num>   : use <num> lines of context during diff (optional, default: -C1)\n");
	printf(" -A<num>   : accuracy for diff: 0=lines, 1=words, 2=chars (optional, default: -A1)\n");
	printf(" -d        : change the algorithm to perhaps find a smaller set of changes;\n");
	printf("             this makes diff slower (sometimes much slower)\n");
	printf(" -t<text>  : text for caption (optional, default: empty)\n");
	printf(" -r<rev>   : revision of old file (optional, default: empty)\n");
	printf(" -q        : be less verbose\n");
	printf(" <oldfile> : first file for diff\n");
	printf(" <newfile> : second file for diff\n");
	printf(" <outfile> : file for HTML output (optional, default: stdout)\n");
}

int
main(int argc, char **argv)
{
	char EMPTY[] = "";
	char DEFAULT[] = "-I'^#'";
	char ignoreWHITE[] = " -b -B";
	char *old_fn, *new_fn, *html_fn, *caption = EMPTY, *revision = EMPTY, *ignoreEXP = DEFAULT, *ignore;
	int LWC = 1, context = 1, option, mindiff = 0, quiet = 0;

	while ((option = getopt(argc, argv, "hdqA:C:I:t:r:")) != EOF)
		switch (option) {
		case 'd':
			mindiff = 1;
			break;
		case 'A':
			LWC = atoi(optarg);
			break;
		case 'C':
			context = atoi(optarg);

			break;
		case 'I':
			ignoreEXP = (char *) malloc(strlen(optarg) + 6);
#ifdef NATIVE_WIN32
			strcpy(ignoreEXP, "-I");
#else
			strcpy(ignoreEXP, "'-I");
#endif
			strcat(ignoreEXP, optarg);
#ifndef NATIVE_WIN32
			strcat(ignoreEXP, "'");
#endif
			break;
		case 't':
			caption = optarg;
			break;
		case 'r':
			revision = optarg;
			break;
		case 'q':
			quiet = 1;
			break;
		case 'h':
		default:
			showUsage(argv[0]);
			exit(1);
		}

	ignore = (char *) malloc(strlen(ignoreEXP) + strlen(ignoreWHITE) + 2);
	strcpy(ignore, ignoreEXP);
	strcat(ignore, ignoreWHITE);

	optind--;
	old_fn = ((argc > (++optind)) ? argv[optind] : "-");
	new_fn = ((argc > (++optind)) ? argv[optind] : "-");
	html_fn = ((argc > (++optind)) ? argv[optind] : "-");

	TRACE(fprintf(STDERR, "%s %s -A %i -C %i %s -t %s -r %s  %s %s %s\n", argv[0], mindiff ? "-d" : "", LWC, context, ignore, caption, revision, old_fn, new_fn, html_fn));

	switch (oldnew2html(mindiff, LWC, context, ignore, old_fn, new_fn, html_fn, caption, revision)) {
	case 0:
		if (quiet == 0)
			fprintf(STDERR, "%s and %s are equal.\n", old_fn, new_fn);
		break;
	case 1:
		if (quiet != 0) {
			fprintf(STDERR, "\n+ (%s) slightly\n", new_fn);
		} else {
			fprintf(STDERR, "%s and %s differ slightly.\n", old_fn, new_fn);
		}
		break;
	case 2:
		if (quiet != 0) {
			fprintf(STDERR, "\n* (%s) significantly\n", new_fn);
		} else {
			fprintf(STDERR, "%s and %s differ SIGNIFICANTLY!\n", old_fn, new_fn);
		}
		break;
	}

	TRACE(fprintf(STDERR, "done.\n"));
	return 0;
}