Atlas - testloadso.c
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[FILE BEGIN]
1/*
2  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
3
4  This software is provided 'as-is', without any express or implied
5  warranty.  In no event will the authors be held liable for any damages
6  arising from the use of this software.
7
8  Permission is granted to anyone to use this software for any purpose,
9  including commercial applications, and to alter it and redistribute it
10  freely.
11*/
12
13/* Test program to test dynamic loading with the loadso subsystem.
14 */
15
16#include <stdio.h>
17
18#include <SDL3/SDL.h>
19#include <SDL3/SDL_main.h>
20#include <SDL3/SDL_test.h>
21
22typedef int (*fntype)(const char *);
23
24static void log_usage(char *progname, SDLTest_CommonState *state) {
25    static const char *options[] = { "library", "functionname|--hello", NULL };
26    SDLTest_CommonLogUsage(state, progname, options);
27    SDL_Log("USAGE: %s <library> <functionname>", progname);
28    SDL_Log("       %s <lib with puts()> --hello", progname);
29}
30
31int main(int argc, char *argv[])
32{
33    int i;
34    int result = 0;
35    int hello = 0;
36    const char *libname = NULL;
37    const char *symname = NULL;
38    SDL_SharedObject *lib = NULL;
39    fntype fn = NULL;
40    SDLTest_CommonState *state;
41
42    /* Initialize test framework */
43    state = SDLTest_CommonCreateState(argv, 0);
44    if (!state) {
45        return 1;
46    }
47
48    /* Parse commandline */
49    for (i = 1; i < argc;) {
50        int consumed;
51
52        consumed = SDLTest_CommonArg(state, i);
53        if (!consumed) {
54            if (SDL_strcmp(argv[i], "--hello") == 0) {
55                if (!symname || SDL_strcmp(symname, "puts") == 0) {
56                    symname = "puts";
57                    consumed = 1;
58                    hello = 1;
59                }
60            } else if (!libname) {
61                libname = argv[i];
62                consumed = 1;
63            } else if (!symname) {
64                symname = argv[i];
65                consumed = 1;
66            }
67        }
68        if (consumed <= 0) {
69            log_usage(argv[0], state);
70            return 1;
71        }
72
73        i += consumed;
74    }
75
76    if (!libname || !symname) {
77        log_usage(argv[0], state);
78        return 1;
79    }
80
81    /* Initialize SDL */
82    if (!SDL_Init(0)) {
83        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s", SDL_GetError());
84        return 2;
85    }
86
87    lib = SDL_LoadObject(libname);
88    if (!lib) {
89        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadObject('%s') failed: %s",
90                     libname, SDL_GetError());
91        result = 3;
92    } else {
93        fn = (fntype)SDL_LoadFunction(lib, symname);
94        if (!fn) {
95            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadFunction('%s') failed: %s",
96                         symname, SDL_GetError());
97            result = 4;
98        } else {
99            SDL_Log("Found %s in %s at %p", symname, libname, fn);
100            if (hello) {
101                SDL_Log("Calling function...");
102                fn("     HELLO, WORLD!\n");
103                SDL_Log("...apparently, we survived.  :)");
104                SDL_Log("Unloading library...");
105            }
106        }
107        SDL_UnloadObject(lib);
108    }
109    SDL_Quit();
110    SDLTest_CommonDestroyState(state);
111    return result;
112}
113
[FILE END]
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