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-rw-r--r--source/snapshot.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/source/snapshot.c b/source/snapshot.c
new file mode 100644
index 0000000..f5a8b9c
--- /dev/null
+++ b/source/snapshot.c
@@ -0,0 +1,176 @@
+/*
+ ds81 - Nintendo DS ZX81 emulator
+
+ Copyright (C) 2006 Ian Cowburn <ianc@noddybox.co.uk>
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ -------------------------------------------------------------------------
+
+ Provides the routines for snapshotting.
+
+*/
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <nds.h>
+
+#include "zx81.h"
+#include "gui.h"
+
+#include "config.h"
+
+#include "ds81_debug.h"
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+
+/* ---------------------------------------- STATICS
+*/
+static int enabled;
+static const char *magic = "V00_DS81";
+
+
+/* ---------------------------------------- PRIVATE FUNCTIONS
+*/
+static void WriteMagic(FILE *fp)
+{
+ const char *p = magic;
+
+ while(*p)
+ {
+ fputc(*p++, fp);
+ }
+}
+
+static int CheckMagic(FILE *fp)
+{
+ const char *p = magic;
+
+ while(*p)
+ {
+ if (fgetc(fp) != *p++)
+ {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+
+/* ---------------------------------------- EXPORTED INTERFACES
+*/
+void SNAP_Enable(int enable)
+{
+ enabled = enable;
+}
+
+void SNAP_Save(Z80 *cpu)
+{
+ char base[FILENAME_MAX] = "";
+ char file[FILENAME_MAX];
+ FILE *fp = NULL;
+
+ if (!enabled)
+ {
+ return;
+ }
+
+ if(!GUI_InputName(base, 8) || !base[0])
+ {
+ return;
+ }
+
+ strcat(base, ".D81");
+
+ strcpy(file, DEFAULT_SNAPDIR);
+ strcat(file, base);
+
+ fp = fopen(file, "wb");
+
+ if (!fp)
+ {
+ fp = fopen(base, "wb");
+ }
+
+ if (fp)
+ {
+ WriteMagic(fp);
+ SK_SaveSnapshot(fp);
+ Z80SaveSnapshot(cpu, fp);
+ ZX81SaveSnapshot(fp);
+ fclose(fp);
+ }
+}
+
+void SNAP_Load(Z80 *cpu, const char *optional_name)
+{
+ static char last_dir[FILENAME_MAX] = "/";
+ char file[FILENAME_MAX];
+ FILE *fp = NULL;
+
+ if (!enabled)
+ {
+ return;
+ }
+
+ if (optional_name)
+ {
+ strcpy(file, DEFAULT_SNAPDIR);
+ strcat(file, optional_name);
+
+ fp = fopen(file, "rb");
+
+ if (!fp)
+ {
+ fp = fopen(optional_name, "rb");
+ }
+ }
+ else
+ {
+ if (GUI_FileSelect(last_dir, file, ".D81"))
+ {
+ fp = fopen(file, "rb");
+ }
+ }
+
+ if (fp)
+ {
+ if (!CheckMagic(fp))
+ {
+ GUI_Alert(FALSE, "Not a valid snapshot");
+ }
+ else
+ {
+ DS81_DEBUG("Loading SK snap");
+ SK_LoadSnapshot(fp);
+ DS81_DEBUG("Loading Z80 snap");
+ Z80LoadSnapshot(cpu, fp);
+ DS81_DEBUG("Loading ZX81 snap");
+ ZX81LoadSnapshot(fp);
+ DS81_DEBUG("Snap loaded");
+ }
+
+ fclose(fp);
+ }
+}