1 /***************************************************************************
2 * Copyright (C) 2007 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
25 ***************************************************************************/
32 #include "configuration.h"
38 enum fileio_type type
;
39 enum fileio_access access
;
43 static inline int fileio_close_local(struct fileio
*fileio
)
45 int retval
= fclose(fileio
->file
);
48 LOG_ERROR("BUG: fileio->file not a valid file descriptor");
50 LOG_ERROR("couldn't close %s: %s", fileio
->url
, strerror(errno
));
52 return ERROR_FILEIO_OPERATION_FAILED
;
58 static inline int fileio_open_local(struct fileio
*fileio
)
63 switch (fileio
->access
) {
65 strcpy(file_access
, "r");
68 strcpy(file_access
, "w");
70 case FILEIO_READWRITE
:
71 strcpy(file_access
, "w+");
74 strcpy(file_access
, "a");
76 case FILEIO_APPENDREAD
:
77 strcpy(file_access
, "a+");
80 LOG_ERROR("BUG: access neither read, write nor readwrite");
81 return ERROR_COMMAND_SYNTAX_ERROR
;
84 /* win32 always opens in binary mode */
86 if (fileio
->type
== FILEIO_BINARY
)
88 strcat(file_access
, "b");
90 fileio
->file
= open_file_from_path(fileio
->url
, file_access
);
92 LOG_ERROR("couldn't open %s", fileio
->url
);
93 return ERROR_FILEIO_OPERATION_FAILED
;
98 if ((fileio
->access
!= FILEIO_WRITE
) || (fileio
->access
== FILEIO_READWRITE
)) {
99 /* NB! Here we use fseek() instead of stat(), since stat is a
100 * more advanced operation that might not apply to e.g. a disk path
101 * that refers to e.g. a tftp client */
104 result
= fseek(fileio
->file
, 0, SEEK_END
);
106 file_size
= ftell(fileio
->file
);
108 result2
= fseek(fileio
->file
, 0, SEEK_SET
);
110 if ((file_size
< 0) || (result
< 0) || (result2
< 0)) {
111 fileio_close_local(fileio
);
112 return ERROR_FILEIO_OPERATION_FAILED
;
116 fileio
->size
= file_size
;
121 int fileio_open(struct fileio
**fileio
, const char *url
,
122 enum fileio_access access_type
, enum fileio_type type
)
127 tmp
= malloc(sizeof(struct fileio
));
130 tmp
->access
= access_type
;
131 tmp
->url
= strdup(url
);
133 retval
= fileio_open_local(tmp
);
135 if (retval
!= ERROR_OK
) {
146 int fileio_close(struct fileio
*fileio
)
150 retval
= fileio_close_local(fileio
);
158 int fileio_seek(struct fileio
*fileio
, size_t position
)
162 retval
= fseek(fileio
->file
, position
, SEEK_SET
);
165 LOG_ERROR("couldn't seek file %s: %s", fileio
->url
, strerror(errno
));
166 return ERROR_FILEIO_OPERATION_FAILED
;
172 static int fileio_local_read(struct fileio
*fileio
, size_t size
, void *buffer
,
177 retval
= fread(buffer
, 1, size
, fileio
->file
);
178 *size_read
= (retval
>= 0) ? retval
: 0;
180 return (retval
< 0) ? retval
: ERROR_OK
;
183 int fileio_read(struct fileio
*fileio
, size_t size
, void *buffer
,
186 return fileio_local_read(fileio
, size
, buffer
, size_read
);
189 int fileio_read_u32(struct fileio
*fileio
, uint32_t *data
)
195 retval
= fileio_local_read(fileio
, sizeof(uint32_t), buf
, &size_read
);
197 if (ERROR_OK
== retval
&& sizeof(uint32_t) != size_read
)
199 if (ERROR_OK
== retval
)
200 *data
= be_to_h_u32(buf
);
205 static int fileio_local_fgets(struct fileio
*fileio
, size_t size
, void *buffer
)
207 if (fgets(buffer
, size
, fileio
->file
) == NULL
)
208 return ERROR_FILEIO_OPERATION_FAILED
;
213 int fileio_fgets(struct fileio
*fileio
, size_t size
, void *buffer
)
215 return fileio_local_fgets(fileio
, size
, buffer
);
218 static int fileio_local_write(struct fileio
*fileio
, size_t size
,
219 const void *buffer
, size_t *size_written
)
223 retval
= fwrite(buffer
, 1, size
, fileio
->file
);
224 *size_written
= (retval
>= 0) ? retval
: 0;
226 return (retval
< 0) ? retval
: ERROR_OK
;
229 int fileio_write(struct fileio
*fileio
, size_t size
, const void *buffer
,
230 size_t *size_written
)
234 retval
= fileio_local_write(fileio
, size
, buffer
, size_written
);
236 if (retval
== ERROR_OK
)
237 fileio
->size
+= *size_written
;
242 int fileio_write_u32(struct fileio
*fileio
, uint32_t data
)
246 h_u32_to_be(buf
, data
);
249 retval
= fileio_write(fileio
, 4, buf
, &size_written
);
251 if (ERROR_OK
== retval
&& size_written
!= sizeof(uint32_t))
260 * For now this can not fail, but that's because a seek was executed
263 * Avoiding the seek on startup opens up for using streams.
266 int fileio_size(struct fileio
*fileio
, size_t *size
)
268 *size
= fileio
->size
;
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