1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* Copyright (C) 2024 Tristan Riehs
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <dlfcn.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "disp.h"
#define dlsym_and_check(dest, name) \
dest->name = dlsym(dest->dl_handle, #name); \
if ((!dest->name) || (dest->name == dest->dl_handle)) { \
char *msg = dlerror(); \
fprintf(stderr, "calculer: %s\n", msg); \
dlclose(dest->dl_handle); \
free(dest); \
return NULL; \
}
struct disp *
get_disp(char *disp_name)
{
#ifndef NDEBUG
/* displays are shared libraries */
char so_path[64] = {0};
strcpy(so_path, "./src/.libs/");
strcat(so_path, disp_name);
strcat(so_path, ".so.0.0.0");
void *handle = dlopen(so_path, RTLD_LAZY);
if (!handle)
{
char *msg = dlerror();
fprintf(stderr, "calculer: %s\n", msg);
exit(1);
}
struct disp *disp = malloc(sizeof(*disp));
disp->dl_handle = handle;
dlsym_and_check(disp, init);
dlsym_and_check(disp, display_calc);
dlsym_and_check(disp, read_input);
dlsym_and_check(disp, display_res);
dlsym_and_check(disp, destroy);
return disp;
#else
# error "not available yet"
#endif
return NULL;
}
|
