/*-------------------------------------------------
image_battery_save_by_name - stores the battery
backed RAM for an image. A filename may be supplied
to the function.
-------------------------------------------------*/
void image_battery_save_by_name(emu_options &options, const char *filename, const void *buffer, int length)
{
assert_always(buffer && (length > 0), "Must specify sensical buffer/length");
/* try to open the battery file and write it out, if possible */
emu_file file(options.nvram_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
file_error filerr = file.open(filename);
if (filerr == FILERR_NONE)
file.write(buffer, length);
}
void image_battery_load_by_name(emu_options &options, const char *filename, void *buffer, int length, int fill)
{
file_error filerr;
int bytes_read = 0;
assert_always(buffer && (length > 0), "Must specify sensical buffer/length");
/* try to open the battery file and read it in, if possible */
emu_file file(options.nvram_directory(), OPEN_FLAG_READ);
filerr = file.open(filename);
if (filerr == FILERR_NONE)
bytes_read = file.read(buffer, length);
/* fill remaining bytes (if necessary) */
memset(((char *) buffer) + bytes_read, fill, length - bytes_read);
}
void image_battery_load_by_name(emu_options &options, const char *filename, void *buffer, int length, void *def_buffer)
{
file_error filerr;
int bytes_read = 0;
assert_always(buffer && (length > 0), "Must specify sensical buffer/length");
/* try to open the battery file and read it in, if possible */
emu_file file(options.nvram_directory(), OPEN_FLAG_READ);
filerr = file.open(filename);
if (filerr == FILERR_NONE)
bytes_read = file.read(buffer, length);
/* if no file was present, copy the default battery */
if (bytes_read == 0 && def_buffer)
memcpy((char *) buffer, (char *) def_buffer, length);
}
