gnuboy-for-dfi/sys/nix/map.c

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/*
* this code is not yet used. eventually we want to support using mmap
* to map rom and sram into memory, so we don't waste virtual memory.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include "defs.h"
#define DOTDIR ".gnuboy"
static char *home, *saves;
static char *romfile, *sramfile, *saveprefix;
static int mmapped_rom, mmaped_sram;
byte *map_rom()
{
int fd, len;
byte code;
byte *mem;
fd = open(romfile, O_READ);
lseek(fd, 0x0148, SEEK_SET);
read(fd, &code, 1);
len = loader_romsize(code);
#ifdef HAVE_MMAP
mem = mmap(0, len, PROT_READ,
#endif
}
int map_checkdirs()
{
home = malloc(strlen(getenv("HOME")) + strlen(DOTDIR) + 2);
sprintf(home, "%s/" DOTDIR, getenv(HOME));
saves = malloc(strlen(home) + 6);
sprintf(saves, "%s/saves", home);
if (access(saves, X_OK|W_OK))
{
if (access(home, X_OK|W_OK))
{
if (!access(home, F_OK))
die("cannot access %s (%s)\n", home, strerror(errno));
if (mkdir(home, 0777))
die("cannot create %s (%s)\n", home, strerror(errno));
}
if (!access(saves, F_OK))
die("cannot access %s (%s)\n", home, strerror(errno));
if (mkdir(saves, 0777))
die("cannot create %s (%s)\n", saves, strerror(errno));
}
return 0;
}