ROM load progress bar

[picodrive.git] / Pico / Cart.c

diff --git a/Pico/Cart.c b/Pico/Cart.c
index a847088..1cf8dec 100644 (file)
--- a/Pico/Cart.c
+++ b/Pico/Cart.c
@@ -15,6 +15,8 @@
 \r
 static char *rom_exts[] = { "bin", "gen", "smd", "iso" };\r
 \r
+void (*PicoCartLoadProgressCB)(int percent) = NULL;\r
+\r
 \r
 pm_file *pm_open(const char *path)\r
 {\r
@@ -244,7 +246,7 @@ static unsigned char *PicoCartAlloc(int filesize)
 \r
 int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize)\r
 {\r
-  unsigned char *rom=NULL; int size;\r
+  unsigned char *rom=NULL; int size, bytes_read;\r
   if (f==NULL) return 1;\r
 \r
   size=f->size;\r
@@ -258,7 +260,30 @@ int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize)
     return 1;\r
   }\r
 \r
-  pm_read(rom,size,f); // Load up the rom\r
+  if (PicoCartLoadProgressCB != NULL)\r
+  {\r
+    // read ROM in blocks, just for fun\r
+    int ret;\r
+    unsigned char *p = rom;\r
+    bytes_read=0;\r
+    do\r
+    {\r
+      int todo = size - bytes_read;\r
+      if (todo > 256*1024) todo = 256*1024;\r
+      ret = pm_read(p,todo,f);\r
+      bytes_read += ret;\r
+      p += ret;\r
+      PicoCartLoadProgressCB(bytes_read * 100 / size);\r
+    }\r
+    while (ret > 0);\r
+  }\r
+  else\r
+    bytes_read = pm_read(rom,size,f); // Load up the rom\r
+  if (bytes_read <= 0) {\r
+    printf("read failed\n");\r
+    free(rom);\r
+    return 1;\r
+  }\r
 \r
   // maybe we are loading MegaCD BIOS?\r
   if (!(PicoMCD&1) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) || !strncmp((char *)rom+0x128, "BOOT", 4))) {\r