/usr/include/genometools/core/file_api.h is in libgenometools0-dev 1.5.8-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (c) 2005-2011 Gordon Gremme <gordon@gremme.org>
Copyright (c) 2005-2008 Center for Bioinformatics, University of Hamburg
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef FILE_API_H
#define FILE_API_H
#include <stdio.h>
#include "core/error_api.h"
/* This class defines (generic) files in __GenomeTools__. A generic file is is a
file which either uncompressed or compressed (with gzip or bzip2).
A <NULL>-pointer as generic file implies <stdout>. */
typedef struct GtFile GtFile;
/* Return a new <GtFile> object for the given <path> and open the underlying
file handle with given <mode>. Returns <NULL> and sets <err> accordingly, if
the file <path> could not be opened. The compression mode is determined by
the ending of <path> (gzip compression if it ends with '.gz', bzip2
compression if it ends with '.bz2', and uncompressed otherwise). */
GtFile* gt_file_new(const char *path, const char *mode, GtError *err);
/* Increments the reference count of <file>. */
GtFile* gt_file_ref(GtFile *file);
/* Create a new <GtFile> object from a normal file pointer <fp>. */
GtFile* gt_file_new_from_fileptr(FILE *fp);
/* <printf(3)> for generic <file>. */
void gt_file_xprintf(GtFile *file, const char *format, ...)
__attribute__ ((format (printf, 2, 3)));
/* Write <\0>-terminated C string <cstr> to <file>. Similar to <fputs(3)>, but
terminates on error. */
void gt_file_xfputs(const char *cstr, GtFile *file);
/* Write single character <c> to <file>. Similar to <fputc(3)>, but terminates
on error. */
void gt_file_xfputc(int c, GtFile *file);
/* Return next character from <file> or <EOF>, if end-of-file is reached. */
int gt_file_xfgetc(GtFile *file);
/* Read up to <nbytes> from generic <file> and store result in <buf>, returns
bytes read. */
int gt_file_xread(GtFile *file, void *buf, size_t nbytes);
/* Write <nbytes> from <buf> to given generic <file>. */
void gt_file_xwrite(GtFile *file, void *buf, size_t nbytes);
/* Rewind the generic <file>. */
void gt_file_xrewind(GtFile *file);
/* Close the underlying file handle and destroy the <file> object. */
void gt_file_delete(GtFile *file);
/* Destroy the file handle object, but do not close the underlying handle. */
void gt_file_delete_without_handle(GtFile*);
#endif
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