libarchive/archive_read_set_options.c

/*-
 * Copyright (c) 2011 Tim Kientzle
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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.
 */

#include "archive_platform.h"
__FBSDID("$FreeBSD$");

#include "archive_read_private.h"
#include "archive_options_private.h"

static int	archive_set_format_option(struct archive *a,
		    const char *m, const char *o, const char *v);
static int	archive_set_filter_option(struct archive *a,
		    const char *m, const char *o, const char *v);
static int	archive_set_option(struct archive *a,
		    const char *m, const char *o, const char *v);

int
archive_read_set_format_option(struct archive *a, const char *m, const char *o,
    const char *v)
{
	return _archive_set_option(a, m, o, v,
	    ARCHIVE_READ_MAGIC, "archive_read_set_format_option",
	    archive_set_format_option);
}

int
archive_read_set_filter_option(struct archive *a, const char *m, const char *o,
    const char *v)
{
	return _archive_set_option(a, m, o, v,
	    ARCHIVE_READ_MAGIC, "archive_read_set_filter_option",
	    archive_set_filter_option);
}

int
archive_read_set_option(struct archive *a, const char *m, const char *o,
    const char *v)
{
	return _archive_set_option(a, m, o, v,
	    ARCHIVE_READ_MAGIC, "archive_read_set_option",
	    archive_set_option);
}

int
archive_read_set_options(struct archive *a, const char *options)
{
	return _archive_set_options(a, options,
	    ARCHIVE_READ_MAGIC, "archive_read_set_options",
	    archive_set_option);
}

static int
archive_set_format_option(struct archive *_a, const char *m, const char *o,
    const char *v)
{
	struct archive_read *a = (struct archive_read *)_a;
	size_t i;
	int r, rv = ARCHIVE_WARN, matched_modules = 0;

	for (i = 0; i < sizeof(a->formats)/sizeof(a->formats[0]); i++) {
		struct archive_format_descriptor *format = &a->formats[i];

		if (format->options == NULL || format->name == NULL)
			/* This format does not support option. */
			continue;
		if (m != NULL) {
			if (strcmp(format->name, m) != 0)
				continue;
			++matched_modules;
		}

		a->format = format;
		r = format->options(a, o, v);
		a->format = NULL;

		if (r == ARCHIVE_FATAL)
			return (ARCHIVE_FATAL);

		if (r == ARCHIVE_OK)
			rv = ARCHIVE_OK;
	}
	/* If the format name didn't match, return a special code for
	 * _archive_set_option[s]. */
	if (m != NULL && matched_modules == 0)
		return ARCHIVE_WARN - 1;
	return (rv);
}

static int
archive_set_filter_option(struct archive *_a, const char *m, const char *o,
    const char *v)
{
	struct archive_read *a = (struct archive_read *)_a;
	struct archive_read_filter *filter;
	struct archive_read_filter_bidder *bidder;
	int r, rv = ARCHIVE_WARN, matched_modules = 0;

	for (filter = a->filter; filter != NULL; filter = filter->upstream) {
		bidder = filter->bidder;
		if (bidder == NULL)
			continue;
		if (bidder->options == NULL)
			/* This bidder does not support option */
			continue;
		if (m != NULL) {
			if (strcmp(filter->name, m) != 0)
				continue;
			++matched_modules;
		}

		r = bidder->options(bidder, o, v);

		if (r == ARCHIVE_FATAL)
			return (ARCHIVE_FATAL);

		if (r == ARCHIVE_OK)
			rv = ARCHIVE_OK;
	}
	/* If the filter name didn't match, return a special code for
	 * _archive_set_option[s]. */
	if (m != NULL && matched_modules == 0)
		return ARCHIVE_WARN - 1;
	return (rv);
}

static int
archive_set_option(struct archive *a, const char *m, const char *o,
    const char *v)
{
	return _archive_set_either_option(a, m, o, v,
	    archive_set_format_option,
	    archive_set_filter_option);
}