Merge ccdbg and altos sources into one giant repository

[fw/altos] / lib / ccdbg-rom.c

diff --git a/lib/ccdbg-rom.c b/lib/ccdbg-rom.c
new file mode 100644 (file)
index 0000000..71bed22
--- /dev/null
+++ b/lib/ccdbg-rom.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ */
+
+#include "ccdbg.h"
+
+uint8_t
+ccdbg_set_rom(struct ccdbg *dbg, struct hex_image *rom)
+{
+       if (dbg->rom)
+               ccdbg_hex_image_free(dbg->rom);
+       dbg->rom = rom;
+       return 0;
+}
+
+uint8_t
+ccdbg_rom_contains(struct ccdbg *dbg, uint16_t addr, int nbytes)
+{
+       struct hex_image *rom = dbg->rom;
+       if (!rom)
+               return 0;
+       if (addr < rom->address || rom->address + rom->length < addr + nbytes)
+               return 0;
+       return 1;
+}
+
+uint8_t
+ccdbg_rom_replace_xmem(struct ccdbg *dbg,
+                      uint16_t addr, uint8_t *bytes, int nbytes)
+{
+       struct hex_image *rom = dbg->rom;
+       if (!rom)
+               return 0;
+
+       if (rom->address < addr + nbytes && addr < rom->address + rom->length) {
+               int     start, stop;
+
+               start = addr;
+               if (addr < rom->address)
+                       start = rom->address;
+               stop = addr + nbytes;
+               if (rom->address + rom->length < stop)
+                       stop = rom->address + rom->length;
+               memcpy(bytes + start - addr, rom->data + start - rom->address,
+                      stop - start);
+               return 1;
+       }
+       return 0;
+}