2 * 2ooM: The Master of Orion II Reverse Engineering Project
3 * Default file operations structures for liblbx.
4 * Copyright © 2010, 2014 Nick Bowler
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 /* Default I/O operations for ordinary files. */
28 static size_t file_read(void *buf, size_t size, void *handle)
30 size_t rc = fread(buf, 1, size, (FILE *)handle);
32 if (rc < size && ferror((FILE *)handle))
33 lbx_error_raise(-errno);
37 static int file_seek(void *handle, long offset, int whence)
39 if (fseek((FILE *)handle, offset, whence) == -1) {
40 lbx_error_raise(-errno);
47 static int file_eof(void *handle)
49 return feof((FILE *)handle);
52 const struct lbx_file_ops lbx_default_fops = {
58 /* Read function for pipes that tracks the number of bytes read. */
59 static size_t pipe_read(void *buf, size_t size, void *handle)
61 struct lbx_pipe_state *state = handle;
64 rc = file_read(buf, size, state->f);
69 /* Seek function for pipes that reads data into the void. */
70 static int pipe_seek(void *handle, long offset, int whence)
72 struct lbx_pipe_state *state = handle;
77 distance = offset - state->offset;
92 while (distance > 0) {
93 static unsigned char oblivion[1024];
94 size_t rc, amount = MIN(sizeof oblivion, distance);
96 rc = pipe_read(oblivion, amount, handle);
107 static int pipe_eof(void *handle)
109 struct lbx_pipe_state *state = handle;
111 return feof(state->f);
114 const struct lbx_file_ops lbx_pipe_fops = {
120 static size_t lbx_read(void *buf, size_t size, void *handle)
122 return lbx_file_read(handle, buf, size);
125 static int lbx_seek(void *handle, long offset, int whence)
127 return lbx_file_seek(handle, offset, whence);
130 static int lbx_eof(void *handle)
132 return lbx_file_eof(handle);
135 const struct lbx_file_ops lbx_arch_fops = {