io.c

/*
 * libopenraw - io.c
 *
 * Copyright (C) 2005-2020 Hubert Figuière
 *
 * This library is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see
 * <http://www.gnu.org/licenses/>.
 */
 
#include <stdlib.h>
#include <errno.h>
 
#include <libopenraw/io.h>
#include "io_private.h"
#include "posix_io.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define CHECK_PTR(p,r) \
    if(p == NULL) { return r; }
 
struct io_methods* get_default_io_methods(void)
{
    return &posix_io_methods;
}
 
IOFileRef raw_open(struct io_methods * methods, const char *path, int mode)
{
    CHECK_PTR(methods, NULL);
    return methods->open(path, mode);
}
 
int raw_close(IOFileRef f)
{
    int retval;
    CHECK_PTR(f,-1);
    retval = f->methods->close(f);
    free(f);
    return retval;
}
 
 
int raw_seek(IOFileRef f, off_t offset, int whence)
{
    CHECK_PTR(f,-1);
    return f->methods->seek(f, offset, whence);
}
 
 
int raw_read(IOFileRef f, void *buf, size_t count)
{
    CHECK_PTR(f,-1);
    return f->methods->read(f, buf, count);
}
 
off_t raw_filesize(IOFileRef f)
{
    CHECK_PTR(f,0);
    return f->methods->filesize(f);
}
 
void *raw_mmap(IOFileRef f, size_t l, off_t offset)
{
    CHECK_PTR(f,NULL);
    return f->methods->mmap(f, l, offset);
}
 
 
int raw_munmap(IOFileRef f, void *addr, size_t l)
{
    CHECK_PTR(f,-1);
    return f->methods->munmap(f, addr, l);
}
 
 
int raw_get_error(IOFileRef f)
{
    CHECK_PTR(f,EFAULT);
    return f->error;
}
 
 
char *raw_get_path(IOFileRef f)
{
    CHECK_PTR(f,NULL);
    return f->path;
}
 
 
#ifdef __cplusplus
}
#endif