/*
Author: James Bonfield

Copyright (c) 2000-2001 MEDICAL RESEARCH COUNCIL
All rights reserved

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

   . Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.

   . 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.

   . Neither the name of the MEDICAL RESEARCH COUNCIL, THE LABORATORY OF
MOLECULAR BIOLOGY 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/

/*
Copyright (c) 2008, 2009, 2013, 2018 Genome Research Ltd.
Author: James Bonfield <jkb@sanger.ac.uk>

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 names Genome Research Ltd and Wellcome Trust Sanger
Institute 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 GENOME RESEARCH LTD 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 GENOME RESEARCH LTD 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.
*/

#ifndef OPEN_TRACE_FILE_H
#define OPEN_TRACE_FILE_H

#include "mFILE.h"

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Tokenises the search path splitting on colons (unix) or semicolons
 * (windows).
 * We also  explicitly add a "./" to the end of the search path
 *
 * Returns: A new search path with items separated by nul chars. Two nul
 *          chars in a row represent the end of the tokenised path.
 * Returns NULL for a failure.
 *
 * The returned data has been malloced. It is up to the caller to free this
 * memory.
 */
char *tokenise_search_path(const char *searchpath);

/*
 * Opens a trace file named 'file'. This is initially looked for as a
 * pathname relative to a file named "relative_to". This may (for
 * example) be the name of an experiment file referencing the trace
 * file. In this case by passing relative_to as the experiment file
 * filename the trace file will be picked up in the same directory as
 * the experiment file. Relative_to may be supplied as NULL.
 *
 * 'file' is looked for at relative_to, then the current directory, and then
 * all of the locations listed in 'path' (which is a colon separated list).
 * If 'path' is NULL it uses the RAWDATA environment variable instead.
 *
 * Returns a mFILE pointer when found.
 *           NULL otherwise.
 */
mFILE *open_path_mfile(const char *file, char *path, char *relative_to);

/*
 * Returns a mFILE containing the entire contents of the url;
 *         NULL on failure.
 */
mFILE *find_file_url(const char *file, char *url);


/*
 * As per open_path_mfile, but searching only for local filenames.
 * This is useful as we may avoid doing a full mfopen and loading
 * the entire file into memory.
 *
 * Returns the expanded pathname if found.
 *         NULL if not
 */
char *find_path(const char *file, const char *path);

#ifdef __cplusplus
}
#endif

#endif /* OPEN_TRACE_FILE_H */
