andrew/libakgl
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Encode library version and game version into savegame files and check them both

Browse Source
This commit is contained in:
Andrew Kesterson
2026-05-08 23:48:35 -04:00
parent ff6b282112
commit 4c771227f5
3 changed files with 41 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
src/game.c
View File

@@ -34,6 +34,7 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_init()
int i = 0;
PREPARE_ERROR(errctx);
ATTEMPT {
strncpy((char *)&game.libversion, AKGL_VERSION, 32);
game.gameStartTime = SDL_GetTicksNS();
game.lastIterTime = game.gameStartTime;
game.lastFPSTime = game.gameStartTime;
@@ -135,24 +136,23 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_save(char *fpath)
SUCCEED_RETURN(errctx); // SUCCEED_NORETURN if in main().
}
akerr_ErrorContext AKERR_NOIGNORE *akgl_game_load(char *fpath)
akerr_ErrorContext AKERR_NOIGNORE *akgl_game_load_versioncmp(FILE *fp, const char *versiontype, char *curversion)
{
FILE *fp = NULL;
char versionstr[32];
semver_t current_version = {};
semver_t compare_version = {};
PREPARE_ERROR(errctx);
FAIL_ZERO_RETURN(errctx, fpath, AKERR_NULLPOINTER, "NULL file path");
FAIL_ZERO_RETURN(errctx, fp, AKERR_NULLPOINTER, "NULL file pointer");
ATTEMPT {
// Check save game library version
FAIL_NONZERO_BREAK(
errctx,
semver_parse((const char *)&game.version, &current_version),
semver_parse((const char *)curversion, &current_version),
AKERR_VALUE,
"Invalid semantic version in current game: %s",
(char *)&current_version);
fp = fopen(fpath, "rb");
"Invalid semantic %s version in current game: %s",
versiontype,
(char *)curversion);
FAIL_NONZERO_BREAK(
errctx,
(fread((void *)&versionstr, 1, 32, fp) < 32),
@@ -162,13 +162,37 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_load(char *fpath)
errctx,
semver_parse((const char *)&versionstr, &compare_version),
AKERR_VALUE,
"Invalid semantic version in save game: %s",
"Invalid semantic %s version in save game: %s",
versiontype,
(char *)&versionstr);
FAIL_ZERO_BREAK(
errctx,
semver_satisfies(compare_version, current_version, "^"),
semver_satisfies(compare_version, current_version, "="),
AKERR_API,
"Incompatible save game version");
"Incompatible save game %s version (%s ^ %s)",
versiontype,
curversion,
(char *)&versionstr);
} CLEANUP {
semver_free(&current_version);
semver_free(&compare_version);
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext AKERR_NOIGNORE *akgl_game_load(char *fpath)
{
FILE *fp = NULL;
PREPARE_ERROR(errctx);
FAIL_ZERO_RETURN(errctx, fpath, AKERR_NULLPOINTER, "NULL file path");
ATTEMPT {
fp = fopen(fpath, "rb");
FAIL_ZERO_BREAK(errctx, fp, errno, "%s", fpath);
CATCH(errctx, akgl_game_load_versioncmp(fp, "library", (char *)AKGL_VERSION));
CATCH(errctx, akgl_game_load_versioncmp(fp, "game", (char *)&game.version));
rewind(fp);
FAIL_NONZERO_BREAK(
errctx,
@@ -179,8 +203,6 @@ akerr_ErrorContext AKERR_NOIGNORE *akgl_game_load(char *fpath)
if ( fp != NULL ) {
fclose(fp);
}
semver_free(&current_version);
semver_free(&compare_version);
} PROCESS(errctx) {
} FINISH(errctx, true);