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;