captive_options module-loading generalized to be CORBA transportable

[captive.git] / src / libcaptive / client / options-module.c

diff --git a/src/libcaptive/client/options-module.c b/src/libcaptive/client/options-module.c
new file mode 100644 (file)
index 0000000..daefd7e
--- /dev/null
+++ b/src/libcaptive/client/options-module.c
@@ -0,0 +1,115 @@
+/* $Id$
+ * User options handling code of libcaptive
+ * Copyright (C) 2003 Jan Kratochvil <project-captive@jankratochvil.net>
+ * 
+ * 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; exactly version 2 of June 1991 is required
+ * 
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include "config.h"
+
+#include "captive/options.h"   /* self */
+#include <glib/gmessages.h>
+#include "captive/macros.h"
+#include <glib/gstrfuncs.h>
+#include <stdlib.h>
+#include "captive/rtl-file.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+
+
+gboolean captive_options_module_load(struct captive_options_module *options_module,const gchar *pathname_utf8)
+{
+       g_return_val_if_fail(options_module!=NULL,FALSE);
+       g_return_val_if_fail(pathname_utf8!=NULL,FALSE);
+
+       /* Open the Module */
+       options_module->type=CAPTIVE_OPTIONS_MODULE_TYPE_PE32;
+       options_module->pathname_utf8=g_strdup(pathname_utf8);
+       options_module->u.pe32.mapped=TRUE;
+       options_module->u.pe32.base=captive_rtl_file_mmap(
+                       &options_module->u.pe32.length, /* lenp */
+                       pathname_utf8,  /* path */
+                       O_RDONLY,       /* open_flags */
+                       PROT_READ,      /* mmap_prot */
+                       MAP_SHARED);    /* mmap_flags */
+       /* FIXME: convert errno instead of STATUS_INSUFFICIENT_RESOURCES */
+       g_return_val_if_fail(options_module->u.pe32.base!=NULL,FALSE);
+
+       if (options_module->u.pe32.length>=2
+                       && (('M'<<8U)|('Z'<<0U))==GUINT16_FROM_BE(*(const guint16 *)options_module->u.pe32.base)) {
+               /* already done above */
+               }
+       else {
+               captive_rtl_file_munmap(options_module->u.pe32.base);
+               options_module->type=CAPTIVE_OPTIONS_MODULE_TYPE_GMODULE;
+               options_module->u.gmodule.pathname=g_strdup(pathname_utf8);
+               }
+
+       return TRUE;
+}
+
+
+void captive_options_module_copy(struct captive_options_module *dest,const struct captive_options_module *src)
+{
+       g_return_if_fail(dest!=NULL);
+       g_return_if_fail(src!=NULL);
+
+       dest->pathname_utf8=g_strdup(src->pathname_utf8);
+
+       dest->type=src->type;
+       switch (src->type) {
+               case CAPTIVE_OPTIONS_MODULE_TYPE_EMPTY: g_assert_not_reached();
+
+               case CAPTIVE_OPTIONS_MODULE_TYPE_PE32:
+                       dest->u.pe32.base=g_memdup(src->u.pe32.base,src->u.pe32.length);
+                       dest->u.pe32.length=src->u.pe32.length;
+                       dest->u.pe32.mapped=FALSE;
+                       break;
+
+               case CAPTIVE_OPTIONS_MODULE_TYPE_GMODULE:
+                       dest->u.gmodule.pathname=g_strdup(src->u.gmodule.pathname);
+                       break;
+
+               default: g_assert_not_reached();
+               }
+}
+
+
+void captive_options_module_free(struct captive_options_module *options_module)
+{
+       g_return_if_fail(options_module!=NULL);
+
+       g_free(options_module->pathname_utf8);
+
+       switch (options_module->type) {
+               case CAPTIVE_OPTIONS_MODULE_TYPE_EMPTY:
+                       break;
+
+               case CAPTIVE_OPTIONS_MODULE_TYPE_PE32:
+                       if (options_module->u.pe32.mapped)
+                               captive_rtl_file_munmap(options_module->u.pe32.base);
+                       else
+                               g_free(options_module->u.pe32.base);
+                       break;
+
+               case CAPTIVE_OPTIONS_MODULE_TYPE_GMODULE:
+                       g_free(options_module->u.gmodule.pathname);
+                       break;
+
+               default: g_assert_not_reached();
+               }
+}