Replace path.h with asset.h

1 files changed, 72 insertions, 0 deletions

diff --git a/asset.h b/asset.h
new file mode 100644
index 0000000..cc37709
--- /dev/null
+++ b/asset.h
@@ -0,0 +1,72 @@
+/* Copyright (C) 2019  C. McEnroe <june@causal.agency>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ASSET_H
+#define ASSET_H
+
+#include <SDL_filesystem.h>
+#include <SDL_rwops.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+struct Paths {
+	char *base;
+	char *pref;
+};
+
+static inline int assetPaths(struct Paths *paths) {
+	paths->base = SDL_GetBasePath();
+	if (!paths->base) return -1;
+	paths->pref = SDL_GetPrefPath("Causal Agency", "Entertainment Pack");
+	if (!paths->pref) return -1;
+	return 0;
+}
+
+static inline SDL_RWops *
+assetOpen(const struct Paths *paths, const char *names[], size_t len) {
+	const char *dirs[3] = { paths->pref, paths->base, "" };
+	for (size_t i = 0; i < 3; ++i) {
+		for (size_t j = 0; j < len; ++j) {
+			char path[1024];
+			snprintf(path, sizeof(path), "%s%s", dirs[i], names[j]);
+			SDL_RWops *rw = SDL_RWFromFile(path, "rb");
+			if (rw) return rw;
+		}
+	}
+	return NULL;
+}
+
+static inline SDL_RWops *assetOpenCards(const struct Paths *paths) {
+	const char *names[3] = { "CARDS.DLL", "SOL.EXE", "cards.dll" };
+	SDL_RWops *rw = assetOpen(paths, names, 3);
+	if (rw) return rw;
+	char msg[4096];
+	snprintf(
+		msg, sizeof(msg), "%s or %s not found in:\n%s\n%s",
+		names[0], names[1], paths->pref, paths->base
+	);
+	SDL_ShowSimpleMessageBox(
+		SDL_MESSAGEBOX_ERROR, "Entertainment Pack", msg, NULL
+	);
+	return NULL;
+}
+
+static inline SDL_RWops *assetOpenFreeCell(const struct Paths *paths) {
+	const char *names[2] = { "FREECELL.EXE", "freecell.exe" };
+	return assetOpen(paths, names, 2);
+}
+
+#endif