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, see <http://www.gnu.org/licenses/>. *
23 ***************************************************************************/
30 #include "configuration.h"
32 #include "replacements.h"
37 enum fileio_type type;
38 enum fileio_access access;
42 static inline int fileio_close_local(struct fileio *fileio)
44 int retval = fclose(fileio->file);
47 LOG_ERROR("BUG: fileio->file not a valid file descriptor");
49 LOG_ERROR("couldn't close %s: %s", fileio->url, strerror(errno));
51 return ERROR_FILEIO_OPERATION_FAILED;
57 static inline int fileio_open_local(struct fileio *fileio)
62 switch (fileio->access) {
64 strcpy(file_access, "r");
67 strcpy(file_access, "w");
69 case FILEIO_READWRITE:
70 strcpy(file_access, "w+");
73 strcpy(file_access, "a");
75 case FILEIO_APPENDREAD:
76 strcpy(file_access, "a+");
79 LOG_ERROR("BUG: access neither read, write nor readwrite");
80 return ERROR_COMMAND_SYNTAX_ERROR;
83 /* win32 always opens in binary mode */
85 if (fileio->type == FILEIO_BINARY)
87 strcat(file_access, "b");
89 fileio->file = open_file_from_path(fileio->url, file_access);
91 LOG_ERROR("couldn't open %s", fileio->url);
92 return ERROR_FILEIO_OPERATION_FAILED;
97 if ((fileio->access != FILEIO_WRITE) || (fileio->access == FILEIO_READWRITE)) {
98 /* NB! Here we use fseek() instead of stat(), since stat is a
99 * more advanced operation that might not apply to e.g. a disk path
100 * that refers to e.g. a tftp client */
103 result = fseek(fileio->file, 0, SEEK_END);
105 file_size = ftell(fileio->file);
107 result2 = fseek(fileio->file, 0, SEEK_SET);
109 if ((file_size < 0) || (result < 0) || (result2 < 0)) {
110 fileio_close_local(fileio);
111 return ERROR_FILEIO_OPERATION_FAILED;
115 fileio->size = file_size;
120 int fileio_open(struct fileio **fileio, const char *url,
121 enum fileio_access access_type, enum fileio_type type)
126 tmp = malloc(sizeof(struct fileio));
129 tmp->access = access_type;
130 tmp->url = strdup(url);
132 retval = fileio_open_local(tmp);
134 if (retval != ERROR_OK) {
145 int fileio_close(struct fileio *fileio)
149 retval = fileio_close_local(fileio);
157 int fileio_feof(struct fileio *fileio)
159 return feof(fileio->file);
162 int fileio_seek(struct fileio *fileio, size_t position)
166 retval = fseek(fileio->file, position, SEEK_SET);
169 LOG_ERROR("couldn't seek file %s: %s", fileio->url, strerror(errno));
170 return ERROR_FILEIO_OPERATION_FAILED;
176 static int fileio_local_read(struct fileio *fileio, size_t size, void *buffer,
181 retval = fread(buffer, 1, size, fileio->file);
182 *size_read = (retval >= 0) ? retval : 0;
184 return (retval < 0) ? retval : ERROR_OK;
187 int fileio_read(struct fileio *fileio, size_t size, void *buffer,
190 return fileio_local_read(fileio, size, buffer, size_read);
193 int fileio_read_u32(struct fileio *fileio, uint32_t *data)
199 retval = fileio_local_read(fileio, sizeof(uint32_t), buf, &size_read);
201 if (retval == ERROR_OK && sizeof(uint32_t) != size_read)
203 if (retval == ERROR_OK)
204 *data = be_to_h_u32(buf);
209 static int fileio_local_fgets(struct fileio *fileio, size_t size, void *buffer)
211 if (!fgets(buffer, size, fileio->file))
212 return ERROR_FILEIO_OPERATION_FAILED;
217 int fileio_fgets(struct fileio *fileio, size_t size, void *buffer)
219 return fileio_local_fgets(fileio, size, buffer);
222 static int fileio_local_write(struct fileio *fileio, size_t size,
223 const void *buffer, size_t *size_written)
227 retval = fwrite(buffer, 1, size, fileio->file);
228 *size_written = (retval >= 0) ? retval : 0;
230 return (retval < 0) ? retval : ERROR_OK;
233 int fileio_write(struct fileio *fileio, size_t size, const void *buffer,
234 size_t *size_written)
238 retval = fileio_local_write(fileio, size, buffer, size_written);
240 if (retval == ERROR_OK)
241 fileio->size += *size_written;
246 int fileio_write_u32(struct fileio *fileio, uint32_t data)
250 h_u32_to_be(buf, data);
253 retval = fileio_write(fileio, 4, buf, &size_written);
255 if (retval == ERROR_OK && size_written != sizeof(uint32_t))
264 * For now this can not fail, but that's because a seek was executed
267 * Avoiding the seek on startup opens up for using streams.
270 int fileio_size(struct fileio *fileio, size_t *size)
272 *size = fileio->size;