summaryrefslogtreecommitdiffstats
path: root/lib/dns/gen-win32.h
blob: 47910326506a406d943af223601d8ade83b6939c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

/*
 * Copyright (c) 1987, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

/*
 * \note This file was adapted from the NetBSD project's source tree, RCS ID:
 *    NetBSD: getopt.c,v 1.15 1999/09/20 04:39:37 lukem Exp
 *
 * The primary change has been to rename items to the ISC namespace
 * and format in the ISC coding style.
 *
 * This file is responsible for defining two operations that are not
 * directly portable between Unix-like systems and Windows NT, option
 * parsing and directory scanning.  It is here because it was decided
 * that the "gen" build utility was not to depend on libisc.a, so
 * the functions declared in isc/commandline.h and isc/dir.h could not
 * be used.
 *
 * The commandline stuff is pretty much a straight copy from the initial
 * isc/commandline.c.  The dir stuff was shrunk to fit the needs of gen.c.
 */

#ifndef DNS_GEN_WIN32_H
#define DNS_GEN_WIN32_H 1

#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <windows.h>

#include <isc/lang.h>

int isc_commandline_index = 1;		/* Index into parent argv vector. */
int isc_commandline_option;		/* Character checked for validity. */

char *isc_commandline_argument;		/* Argument associated with option. */
char *isc_commandline_progname;		/* For printing error messages. */

bool isc_commandline_errprint = true; /* Print error messages. */
bool isc_commandline_reset = true; /* Reset processing. */

#define BADOPT	'?'
#define BADARG	':'
#define ENDOPT	""

ISC_LANG_BEGINDECLS

/*
 * getopt --
 *	Parse argc/argv argument vector.
 */
int
isc_commandline_parse(int argc, char * const *argv, const char *options) {
	static char *place = ENDOPT;
	char *option;			/* Index into *options of option. */

	/*
	 * Update scanning pointer, either because a reset was requested or
	 * the previous argv was finished.
	 */
	if (isc_commandline_reset || *place == '\0') {
		isc_commandline_reset = false;

		if (isc_commandline_progname == NULL)
			isc_commandline_progname = argv[0];

		if (isc_commandline_index >= argc ||
		    *(place = argv[isc_commandline_index]) != '-') {
			/*
			 * Index out of range or points to non-option.
			 */
			place = ENDOPT;
			return (-1);
		}

		if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
			/*
			 * Found '--' to signal end of options.	 Advance
			 * index to next argv, the first non-option.
			 */
			isc_commandline_index++;
			place = ENDOPT;
			return (-1);
		}
	}

	isc_commandline_option = *place++;
	option = strchr(options, isc_commandline_option);

	/*
	 * Ensure valid option has been passed as specified by options string.
	 * '-:' is never a valid command line option because it could not
	 * distinguish ':' from the argument specifier in the options string.
	 */
	if (isc_commandline_option == ':' || option == NULL) {
		if (*place == '\0')
			isc_commandline_index++;

		if (isc_commandline_errprint && *options != ':')
			fprintf(stderr, "%s: illegal option -- %c\n",
				isc_commandline_progname,
				isc_commandline_option);

		return (BADOPT);
	}

	if (*++option != ':') {
		/*
		 * Option does not take an argument.
		 */
		isc_commandline_argument = NULL;

		/*
		 * Skip to next argv if at the end of the current argv.
		 */
		if (*place == '\0')
			++isc_commandline_index;

	} else {
		/*
		 * Option needs an argument.
		 */
		if (*place != '\0')
			/*
			 * Option is in this argv, -D1 style.
			 */
			isc_commandline_argument = place;

		else if (argc > ++isc_commandline_index)
			/*
			 * Option is next argv, -D 1 style.
			 */
			isc_commandline_argument = argv[isc_commandline_index];

		else {
			/*
			 * Argument needed, but no more argv.
			 */
			place = ENDOPT;

			/*
			 * Silent failure with "missing argument" return
			 * when ':' starts options string, per historical spec.
			 */
			if (*options == ':')
				return (BADARG);

			if (isc_commandline_errprint)
				fprintf(stderr,
				    "%s: option requires an argument -- %c\n",
				    isc_commandline_progname,
				    isc_commandline_option);

			return (BADOPT);
		}

		place = ENDOPT;

		/*
		 * Point to argv that follows argument.
		 */
		isc_commandline_index++;
	}

	return (isc_commandline_option);
}

typedef struct {
	HANDLE handle;
	WIN32_FIND_DATA	find_data;
	bool first_file;
	char *filename;
} isc_dir_t;

bool
start_directory(const char *path, isc_dir_t *dir) {
	char pattern[_MAX_PATH], *p;

	/*
	 * Need space for slash-splat and final NUL.
	 */
	if (strlen(path) + 3 > sizeof(pattern))
		return (false);

	strcpy(pattern, path);

	/*
	 * Append slash (if needed) and splat.
	 */
	p = pattern + strlen(pattern);
	if (p != pattern  && p[-1] != '\\' && p[-1] != ':')
		*p++ = '\\';
	*p++ = '*';
	*p++ = '\0';

	dir->first_file = true;

	dir->handle = FindFirstFile(pattern, &dir->find_data);

	if (dir->handle == INVALID_HANDLE_VALUE) {
		dir->filename = NULL;
		return (false);
	} else {
		dir->filename = dir->find_data.cFileName;
		return (true);
	}
}

bool
next_file(isc_dir_t *dir) {
	if (dir->first_file)
		dir->first_file = false;

	else if (dir->handle != INVALID_HANDLE_VALUE) {
		if (FindNextFile(dir->handle, &dir->find_data) == TRUE)
			dir->filename = dir->find_data.cFileName;
		else
			dir->filename = NULL;

	} else
		dir->filename = NULL;

	if (dir->filename != NULL)
		return (true);
	else
		return (false);
}

void
end_directory(isc_dir_t *dir) {
	if (dir->handle != INVALID_HANDLE_VALUE)
		FindClose(dir->handle);
}

ISC_LANG_ENDDECLS

#endif /* DNS_GEN_WIN32_H */