--- /dev/null
+/*
+ * upkg: tool for manipulating Unreal Tournament packages.
+ * Copyright (C) 2009 Nick Bowler
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <glib-object.h>
+#include <ltdl.h>
+
+#include <uobject/package.h>
+#include "upkg.h"
+
+#define U_PKG_GET_PRIV(o) \
+ G_TYPE_INSTANCE_GET_PRIVATE(o, U_PKG_TYPE, struct upkg_priv)
+
+struct upkg_priv {
+ lt_dlhandle native;
+};
+
+G_DEFINE_TYPE(UPkg, u_pkg, G_TYPE_TYPE_MODULE);
+
+/* Package search path. */
+static char *search_path;
+static size_t search_path_sz;
+
+/* List of package file extensions, in descending order of precedence. */
+static const char u_pkg_exts[][5] = { ".u", ".utx", ".umx", ".uax", ".unr" };
+
+static char *str_cpy_lower(char *dst, const char *src)
+{
+ size_t i;
+
+ for (i = 0; src[i]; i++)
+ dst[i] = tolower(src[i]);
+ dst[i] = 0;
+
+ return dst;
+}
+
+static int str_cmp_lower(const char *s1, const char *s2)
+{
+ size_t i;
+
+ for (i = 0; s1[i] && s2[i]; i++) {
+ int c1 = tolower(s1[i]), c2 = tolower(s2[i]);
+ if (c1 < c2)
+ return -1;
+ if (c1 > c2)
+ return 1;
+ }
+
+ if (s1[i])
+ return 1;
+ if (s2[i])
+ return -1;
+ return 0;
+}
+
+static void dl_print_errors(const char *prefix)
+{
+ const char *err;
+ while ((err = lt_dlerror())) {
+ if (prefix) fprintf(stderr, "%s: ", prefix);
+ fprintf(stderr, "%s\n", err);
+ }
+}
+
+/*
+ * Function for use with lt_dlforeachfile. The user data must point to
+ * a UPkg with the GTypeModule name field initialized. If a suitable file
+ * is found and could be successfully opened for reading, the pkg class member
+ * will be filled in.
+ */
+static int find_package_by_name(const char *filename, void *data)
+{
+ GTypeModule *m = G_TYPE_MODULE(data);
+ UPkg *upkg = U_PKG(data);
+
+ const char *base;
+ size_t len;
+ char *buf;
+
+ base = strrchr(filename, '/');
+ if (base) {
+ base++;
+ } else {
+ base = filename;
+ }
+
+ if (str_cmp_lower(base, m->name) != 0)
+ return 0;
+
+ len = strlen(filename);
+ buf = malloc(len + sizeof **u_pkg_exts);
+ if (!buf)
+ return 0;
+ strcpy(buf, filename);
+
+ for (unsigned i = 0; i < sizeof u_pkg_exts / sizeof *u_pkg_exts; i++) {
+ strcpy(buf+len, u_pkg_exts[i]);
+ upkg->pkg = upkg_fopen(buf);
+ if (!upkg->pkg) {
+ free(buf);
+ return 1;
+ }
+ }
+
+ free(buf);
+ return 0;
+}
+
+static gboolean u_pkg_load(GTypeModule *m)
+{
+ struct upkg_priv *priv = U_PKG_GET_PRIV(m);
+ int (*init_func)(GTypeModule *);
+
+ if (m->name) {
+ priv->native = lt_dlopenext(m->name);
+ if (!priv->native) {
+ dl_print_errors(m->name);
+ return FALSE;
+ }
+
+ init_func = lt_dlsym(priv->native, "init");
+ if (!init_func || init_func(m) != 0) {
+ dl_print_errors(__func__);
+ lt_dlclose(priv->native);
+ return FALSE;
+ }
+ }
+
+ if (!U_PKG(m)->pkg) {
+ lt_dlforeachfile(u_pkg_get_search_path(), find_package_by_name, m);
+ }
+
+ return TRUE;
+}
+
+static void u_pkg_unload(GTypeModule *m)
+{
+ struct upkg_priv *priv = U_PKG_GET_PRIV(m);
+ void (*exit_func)(GTypeModule *);
+ UPkg *upkg = U_PKG(m);
+
+ if (priv->native) {
+ exit_func = lt_dlsym(priv->native, "exit");
+ if (exit_func) {
+ exit_func(m);
+ }
+
+ if (lt_dlclose(priv->native) != 0) {
+ dl_print_errors(__func__);
+ }
+ }
+
+ if (upkg->pkg) {
+ upkg_close(upkg->pkg);
+ upkg->pkg = NULL;
+ }
+}
+
+static void u_pkg_init(UPkg *pkg)
+{
+
+}
+
+static void u_pkg_finalize(GObject *o)
+{
+ UPkg *upkg = U_PKG(o);
+
+ if (upkg->pkg) {
+ upkg_close(upkg->pkg);
+ }
+}
+
+static void u_pkg_class_init(UPkgClass *class)
+{
+ GTypeModuleClass *modclass = G_TYPE_MODULE_CLASS(class);
+ GObjectClass *objclass = G_OBJECT_CLASS(class);
+
+ const char *modpath = getenv("UOBJECT_MODULE_PATH");
+
+ g_type_class_add_private(class, sizeof (struct upkg_priv));
+
+ if (lt_dlinit() != 0) {
+ dl_print_errors(__func__);
+ }
+
+ if (modpath && lt_dlsetsearchpath(modpath) != 0) {
+ dl_print_errors(__func__);
+ }
+ if (lt_dladdsearchdir(PKGLIBDIR) != 0) {
+ dl_print_errors(__func__);
+ }
+
+ modclass->load = u_pkg_load;
+ modclass->unload = u_pkg_unload;
+ objclass->finalize = u_pkg_finalize;
+}
+
+static int expand_search_path(size_t need)
+{
+ size_t want = search_path_sz;
+ if (want == 0) want = 1;
+
+ while (want < need)
+ want *= 2;
+
+ if (want > search_path_sz) {
+ char *new = realloc(search_path, want);
+ if (!new) {
+ return -1;
+ }
+
+ search_path = new;
+ search_path_sz = want;
+ }
+
+ return 0;
+}
+
+const char *u_pkg_get_search_path(void)
+{
+ return search_path ? search_path : "";
+}
+
+int u_pkg_set_search_path(const char *path)
+{
+ if (expand_search_path(strlen(path)+1) != 0)
+ return -1;
+ strcpy(search_path, path);
+ return 0;
+}
+
+int u_pkg_add_search_dir(const char *path)
+{
+ size_t end = search_path ? strlen(search_path) : 0;
+
+ if (end == 0) {
+ return u_pkg_set_search_path(path);
+ }
+
+ if (expand_search_path(end + strlen(path) + 2) != 0)
+ return -1;
+ search_path[end] = LT_PATHSEP_CHAR;
+ strcpy(search_path+end+1, path);
+ return 0;
+}
+
+GTypeModule *u_pkg_new_by_name(const char *name)
+{
+ g_return_val_if_fail(name != NULL, NULL);
+
+ char *pkgname = malloc(strlen(name)+1);
+ if (!pkgname) {
+ return NULL;
+ }
+
+ GTypeModule *mod = g_object_new(U_PKG_TYPE, NULL);
+ if (!mod) {
+ free(pkgname);
+ return NULL;
+ }
+
+ mod->name = str_cpy_lower(pkgname, name);
+ return mod;
+}
+
+GTypeModule *u_pkg_new_by_file(const char *filename)
+{
+ struct upkg *pkg = upkg_fopen(filename);
+ if (!pkg) {
+ return NULL;
+ }
+
+ GTypeModule *mod = g_object_new(U_PKG_TYPE, NULL);
+ if (!mod) {
+ upkg_close(pkg);
+ return NULL;
+ }
+
+ mod->name = NULL;
+ U_PKG(mod)->pkg = pkg;
+ return mod;
+}
projects / upkg.git / blobdiff