80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/* *****************************************************************************
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* core/open.c -- open a file and decode it.
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* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
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*
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* This file is part of libg1m.
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* libg1m is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3.0 of the License,
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* or (at your option) any later version.
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*
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* libg1m is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libg1m; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************** */
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#include <libg1m/internals.h>
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#include <libg1m/internals/stdio_ext.h>
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#include <stdlib.h>
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#ifndef G1M_DISABLED_FILE
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/**
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* g1m_open:
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* Open handle using path.
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*
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* @arg handle the handle to create.
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* @arg path the path of the file to open.
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* @arg expected the expected types (0 if none).
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* @return the error code (0 if ok).
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*/
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int g1m_open(g1m_t **handle, const char *path,
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g1m_type_t expected)
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{
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/* open stream */
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FILE *f = fopen(path, "r");
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/* open using `g1m_fopen` */
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int err = g1m_fopen(handle, path, f, expected);
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/* close opened stream and return error code (or 0 if ok) */
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if (f) fclose(f);
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return (err);
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}
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/**
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* g1m_fopen:
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* Open handle using pointer on FILE.
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*
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* Will not seek, and will not keep the stream.
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* Make sure to fclose the stream after use.
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*
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* @arg handle the handle to create.
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* @arg path the file path.
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* @arg stream the stream.
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* @arg expected the expected types (0 if none).
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* @return the error code (0 if ok)
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*/
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int g1m_fopen(g1m_t **handle, const char *path, FILE *stream,
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g1m_type_t expected)
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{
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/* check stream */
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if (!stream) return (g1m_error_nostream);
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if (!__freadable(stream)) return (g1m_error_noread);
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/* make the buffer */
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g1m_buffer_t buffer = {
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.cookie = stream,
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.read = g1m_filebuffer_read
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};
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/* decode opened file */
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return (g1m_decode(handle, path, &buffer, expected));
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}
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#endif
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