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/*
* 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 <stdlib.h>
#include <assert.h>
#include "disp.h"
#define dlsym_and_check(dest, name) \
dest->name = dlsym(dest->dl_handle, #name); \
if (!dest->name) { \
dlclose(dest->dl_handle); \
free(dest); \
return NULL; \
}
struct disp *
get_disp(char *disp_name)
{
#ifndef NDEBUG
/* displays are shared libraries */
char so_path[16] = {0};
strcpy(so_path, "./");
strcat(so_path, disp_name);
strcat(so_path, ".la");
void *handle = dlopen(so_path, RTLD_LAZY);
if (!handle)
return NULL;
struct disp *disp = malloc(sizeof(*disp));
disp->dl_handle = handle;
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;
}
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