transfer pak: parse command line and load tpak ROM/saves

cen64.c

@@ -200,6 +200,29 @@ cen64_cold int load_paks(struct controller *controller) {
       if (created)
         controller_pak_format(controller[i].mempak_save.ptr);
     }
+
+    else if (controller[i].pak == PAK_TRANSFER) {
+      if (controller[i].tpak_rom_path != NULL) {
+        if (open_rom_file(controller[i].tpak_rom_path,
+              &controller[i].tpak_rom)) {
+          printf("Can't open transfer pak ROM\n");
+          return -1;
+        }
+      } else {
+        printf("No ROM supplied for transfer pak.\n");
+        printf("The game will run but probably won't do anything interest\n");
+      }
+      if (controller[i].tpak_save_path != NULL) {
+        if (open_gb_save(controller[i].tpak_save_path,
+              &controller[i].tpak_save)) {
+          printf("Can't open transfer pak save\n");
+          return -1;
+        }
+      } else {
+        printf("No save supplied for transfer pak. Just FYI.\n");
+      }
+
+    }
   }
   return 0;
 }

device/options.c

@@ -151,6 +151,8 @@ int parse_options(struct cen64_options *options, int argc, const char *argv[]) {
 int parse_controller_options(const char *str, int *num, struct controller *opt) {
   char *token;
   char mempak_path[4096];
+  char tpak_rom_path[4096] = { 0, };
+  char tpak_save_path[4096] = { 0, };
   char *opt_string = strdup(str);
 
   if (opt_string == NULL) {
@@ -165,8 +167,14 @@ int parse_controller_options(const char *str, int *num, struct controller *opt)
       ;
     else if (strcmp(token, "pak=rumble") == 0)
       opt->pak = PAK_RUMBLE;
+    else if (strcmp(token, "pak=transfer") == 0)
+      opt->pak = PAK_TRANSFER;
     else if (sscanf(token, "mempak=%4095s", mempak_path) == 1)
       opt->pak = PAK_MEM;
+    else if (sscanf(token, "tpak_rom=%4095s", tpak_rom_path) == 1)
+      opt->pak = PAK_TRANSFER;
+    else if (sscanf(token, "tpak_save=%4095s", tpak_save_path) == 1)
+      opt->pak = PAK_TRANSFER;
     else {
       printf("Unrecognized controller option: %s\n", token);
       goto err;
@@ -182,7 +190,14 @@ int parse_controller_options(const char *str, int *num, struct controller *opt)
 
   --*num; // internally it's used as an index into an array
   mempak_path[4095] = '\0';
-  opt->mempak_path = strdup(mempak_path);
+  if (strlen(mempak_path) > 0)
+    opt->mempak_path = strdup(mempak_path);
+  tpak_rom_path[4095] = '\0';
+  if (strlen(tpak_rom_path) > 0)
+    opt->tpak_rom_path = strdup(tpak_rom_path);
+  tpak_save_path[4095] = '\0';
+  if (strlen(tpak_save_path) > 0)
+    opt->tpak_save_path = strdup(tpak_save_path);
   opt->present = 1;
 
   free(opt_string);

os/common/save_file.h

@@ -32,6 +32,7 @@ struct save_file {
 
 cen64_cold int close_save_file(const struct save_file *file);
 cen64_cold int open_save_file(const char *path, size_t size, struct save_file *file, int *created);
+cen64_cold int open_gb_save(const char *path, struct save_file *file);
 
 #endif
 

os/posix/save_file.c

@@ -44,7 +44,7 @@ int open_save_file(const char *path, size_t size, struct save_file *file, int *c
   // Get the file's size, map it into the address space.
   if (fstat(fd, &sb) == -1)
     return -1;
-  
+
   if ((size_t)sb.st_size != size)
     if (ftruncate(fd, size) == -1) {
       close(fd);
@@ -62,3 +62,30 @@ int open_save_file(const char *path, size_t size, struct save_file *file, int *c
 
   return 0;
 }
+
+// Opening a game boy save: don't set a specific size and don't create
+// the file if it doesn't exist
+int open_gb_save(const char *path, struct save_file *file) {
+  struct stat sb;
+  void *ptr;
+  int fd;
+
+  // try to open the file
+  if ((fd = open(path, O_RDWR, 0666)) == -1)
+    return -1;
+
+  // Get the file's size, map it into the address space.
+  if (fstat(fd, &sb) == -1)
+    return -1;
+
+  if ((ptr = mmap(NULL, sb.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED) {
+    close(fd);
+    return -1;
+  }
+
+  file->ptr = ptr;
+  file->size = sb.st_size;
+  file->fd = fd;
+
+  return 0;
+}

si/pak.h

@@ -11,6 +11,7 @@
 #ifndef __si_pak_h__
 #define __si_pak_h__
 #include "common.h"
+#include "os/common/rom_file.h"
 #include "os/common/save_file.h"
 
 #define MEMPAK_SIZE 0x8000
@@ -25,9 +26,17 @@ enum pak_type {
 struct controller {
   const char *mempak_path;
   struct save_file mempak_save;
+
   const char *tpak_rom_path;
+  struct rom_file tpak_rom;
   const char *tpak_save_path;
+  struct save_file tpak_save;
+  int tpak_mode;
+  int tpak_mode_changed;
+  int tpak_bank;
+
   enum pak_type pak;
+  int pak_enabled;
   int present;
 };