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/***************************************************************************
* Copyright (C) 2007 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "log.h"
#include "configuration.h"
#include "fileio.h"
struct fileio_internal {
const char *url;
ssize_t size;
enum fileio_type type;
enum fileio_access access;
FILE *file;
};
static inline int fileio_close_local(struct fileio_internal *fileio);
static inline int fileio_open_local(struct fileio_internal *fileio)
{
char file_access[4];
switch (fileio->access) {
case FILEIO_READ:
strcpy(file_access, "r");
break;
case FILEIO_WRITE:
strcpy(file_access, "w");
break;
case FILEIO_READWRITE:
strcpy(file_access, "w+");
break;
case FILEIO_APPEND:
strcpy(file_access, "a");
break;
case FILEIO_APPENDREAD:
strcpy(file_access, "a+");
break;
default:
LOG_ERROR("BUG: access neither read, write nor readwrite");
return ERROR_COMMAND_SYNTAX_ERROR;
}
/* win32 always opens in binary mode */
#ifndef _WIN32
if (fileio->type == FILEIO_BINARY)
#endif
strcat(file_access, "b");
fileio->file = open_file_from_path(fileio->url, file_access);
if (!fileio->file) {
LOG_ERROR("couldn't open %s", fileio->url);
return ERROR_FILEIO_OPERATION_FAILED;
}
if ((fileio->access != FILEIO_WRITE) || (fileio->access == FILEIO_READWRITE)) {
/* NB! Here we use fseek() instead of stat(), since stat is a
* more advanced operation that might not apply to e.g. a disk path
* that refers to e.g. a tftp client */
int result, result2;
result = fseek(fileio->file, 0, SEEK_END);
fileio->size = ftell(fileio->file);
result2 = fseek(fileio->file, 0, SEEK_SET);
if ((fileio->size < 0) || (result < 0) || (result2 < 0)) {
fileio_close_local(fileio);
return ERROR_FILEIO_OPERATION_FAILED;
}
} else
fileio->size = 0x0;
return ERROR_OK;
}
int fileio_open(struct fileio *fileio_p,
const char *url,
enum fileio_access access_type,
enum fileio_type type)
{
int retval = ERROR_OK;
struct fileio_internal *fileio = malloc(sizeof(struct fileio_internal));
fileio_p->fp = fileio;
fileio->type = type;
fileio->access = access_type;
fileio->url = strdup(url);
retval = fileio_open_local(fileio);
return retval;
}
static inline int fileio_close_local(struct fileio_internal *fileio)
{
int retval = fclose(fileio->file);
if (retval != 0) {
if (retval == EBADF)
LOG_ERROR("BUG: fileio_local->file not a valid file descriptor");
else
LOG_ERROR("couldn't close %s: %s", fileio->url, strerror(errno));
return ERROR_FILEIO_OPERATION_FAILED;
}
return ERROR_OK;
}
int fileio_close(struct fileio *fileio_p)
{
int retval;
struct fileio_internal *fileio = fileio_p->fp;
retval = fileio_close_local(fileio);
free((void *)fileio->url);
fileio->url = NULL;
free(fileio);
fileio_p->fp = NULL;
return retval;
}
int fileio_seek(struct fileio *fileio_p, size_t position)
{
int retval;
struct fileio_internal *fileio = fileio_p->fp;
retval = fseek(fileio->file, position, SEEK_SET);
if (retval != 0) {
LOG_ERROR("couldn't seek file %s: %s", fileio->url, strerror(errno));
return ERROR_FILEIO_OPERATION_FAILED;
}
return ERROR_OK;
}
static int fileio_local_read(struct fileio_internal *fileio,
size_t size, void *buffer, size_t *size_read)
{
ssize_t retval = fread(buffer, 1, size, fileio->file);
*size_read = (retval >= 0) ? retval : 0;
return (retval < 0) ? retval : ERROR_OK;
}
int fileio_read(struct fileio *fileio_p, size_t size, void *buffer,
size_t *size_read)
{
struct fileio_internal *fileio = fileio_p->fp;
return fileio_local_read(fileio, size, buffer, size_read);
}
int fileio_read_u32(struct fileio *fileio_p, uint32_t *data)
{
uint8_t buf[4];
size_t size_read;
struct fileio_internal *fileio = fileio_p->fp;
int retval = fileio_local_read(fileio, sizeof(uint32_t), buf, &size_read);
if (ERROR_OK == retval && sizeof(uint32_t) != size_read)
retval = -EIO;
if (ERROR_OK == retval)
*data = be_to_h_u32(buf);
return retval;
}
static int fileio_local_fgets(struct fileio_internal *fileio,
size_t size, void *buffer)
{
if (fgets(buffer, size, fileio->file) == NULL)
return ERROR_FILEIO_OPERATION_FAILED;
return ERROR_OK;
}
int fileio_fgets(struct fileio *fileio_p, size_t size, void *buffer)
{
struct fileio_internal *fileio = fileio_p->fp;
return fileio_local_fgets(fileio, size, buffer);
}
static int fileio_local_write(struct fileio_internal *fileio,
size_t size, const void *buffer, size_t *size_written)
{
ssize_t retval = fwrite(buffer, 1, size, fileio->file);
*size_written = (retval >= 0) ? retval : 0;
return (retval < 0) ? retval : ERROR_OK;
}
int fileio_write(struct fileio *fileio_p,
size_t size, const void *buffer, size_t *size_written)
{
struct fileio_internal *fileio = fileio_p->fp;
int retval = fileio_local_write(fileio, size, buffer, size_written);
if (retval == ERROR_OK)
fileio->size += *size_written;
return retval;
}
int fileio_write_u32(struct fileio *fileio_p, uint32_t data)
{
uint8_t buf[4];
h_u32_to_be(buf, data);
size_t size_written;
int retval = fileio_write(fileio_p, 4, buf, &size_written);
if (ERROR_OK == retval && size_written != sizeof(uint32_t))
retval = -EIO;
return retval;
}
/**
* FIX!!!!
*
* For now this can not fail, but that's because a seek was executed
* on startup.
*
* Avoiding the seek on startup opens up for using streams.
*
*/
int fileio_size(struct fileio *fileio_p, int *size)
{
struct fileio_internal *fileio = fileio_p->fp;
*size = fileio->size;
return ERROR_OK;
}
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