From 0b5ef674f2307c882807cff3ef46f4b6fd4b5bcf Mon Sep 17 00:00:00 2001
From: ksherlock <ksherlock@aa027e90-d47c-11dd-86d7-074df07e0730>
Date: Sat, 24 Jan 2009 04:14:45 +0000
Subject: [PATCH] add support for dos-order sectoring.

git-svn-id: https://profuse.googlecode.com/svn/trunk@25 aa027e90-d47c-11dd-86d7-074df07e0730
---
 Disk.cpp | 31 +++++++++++++++++++++++++++++--
 Disk.h   |  4 +++-
 main.cpp | 12 ++++++++++--
 3 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/Disk.cpp b/Disk.cpp
index bc41601..4f9fa45 100644
--- a/Disk.cpp
+++ b/Disk.cpp
@@ -50,7 +50,7 @@ Disk::~Disk()
 }
 
 
-Disk *Disk::OpenFile(const char *file)
+Disk *Disk::OpenFile(const char *file, bool dos_order)
 {
     int fd;
     struct stat st;
@@ -59,8 +59,11 @@ Disk *Disk::OpenFile(const char *file)
     
     unsigned offset;
     
+    
     void *map;
     Disk *d = NULL;
+
+
     
     fd = open(file, O_RDONLY);
     if (fd >= 0)
@@ -119,7 +122,7 @@ Disk *Disk::OpenFile(const char *file)
                         break;
                     }
 
-                        } while (false);
+                } while (false);
                 
                 if (!ok)
                 {
@@ -138,6 +141,7 @@ Disk *Disk::OpenFile(const char *file)
                 d->_data = (uint8_t *)map;
                 d->_blocks = blocks;
                 d->_offset = offset;
+                d->_dosorder = dos_order;
             }
 
         }
@@ -191,6 +195,29 @@ int Disk::Normalize(FileEntry &f, unsigned fork, ExtendedEntry *ee)
 int Disk::Read(unsigned block, void *buffer)
 {
     if (block > _blocks) return -P8_INVALID_BLOCK;
+    
+    
+    if (_dosorder)
+    {
+        static unsigned do_map[] = {0x00, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x0f };
+                
+        unsigned track = (block & ~0x07) << 9;
+        unsigned sector = (block & 0x07) << 1;
+        
+        for (unsigned i = 0; i < 2; i++)
+        {
+            unsigned offset = track | (do_map[sector+i] << 8); 
+            
+            memcpy(buffer, _data + _offset + offset, 256);
+            
+            buffer = (char *)buffer + 256;
+            
+        }
+        return 1;
+    }
+    
+
+    
     memcpy(buffer, _data + _offset + (block << 9), BLOCK_SIZE);
     return 1;
 }
diff --git a/Disk.h b/Disk.h
index 49c20cb..dbda672 100644
--- a/Disk.h
+++ b/Disk.h
@@ -39,7 +39,7 @@ public:
     ~Disk();
     
     //static Disk *Open2MG(const char *file);
-    static Disk *OpenFile(const char *file);
+    static Disk *OpenFile(const char *file, bool dos_order);
     
 
     int Normalize(FileEntry &f, unsigned fork, ExtendedEntry *ee = NULL);
@@ -61,6 +61,8 @@ private:
     unsigned _offset;
     unsigned _blocks;
     size_t _size;
+    
+    bool _dosorder;
 };
 
 #endif
diff --git a/main.cpp b/main.cpp
index ec7cc83..a55211e 100644
--- a/main.cpp
+++ b/main.cpp
@@ -33,6 +33,8 @@ Disk *disk = NULL;
 char *dfile = NULL;
 VolumeEntry volume;
 
+bool dos_order = false;
+
 
 
 bool validProdosName(const char *name)
@@ -67,7 +69,8 @@ static struct fuse_lowlevel_ops prodos_oper;
 
 enum {
     PRODOS_OPT_HELP,
-    PRODOS_OPT_VERSION
+    PRODOS_OPT_VERSION,
+    PRODOS_OPT_DOS_ORDER
 };
 
 static struct fuse_opt prodos_opts[] = {
@@ -75,6 +78,7 @@ static struct fuse_opt prodos_opts[] = {
     FUSE_OPT_KEY("--help",         PRODOS_OPT_HELP),
     FUSE_OPT_KEY("-V",             PRODOS_OPT_VERSION),
     FUSE_OPT_KEY("--version",      PRODOS_OPT_VERSION),
+    FUSE_OPT_KEY("--dos-order",    PRODOS_OPT_DOS_ORDER),
     {0, 0, 0}
 };
 
@@ -97,6 +101,10 @@ static int prodos_opt_proc(void *data, const char *arg, int key, struct fuse_arg
             // TODO
             exit(1);
             break;
+        case PRODOS_OPT_DOS_ORDER:
+            dos_order = true;
+            return 0;
+            break;
             
         case FUSE_OPT_KEY_NONOPT:
             if (dfile == NULL)
@@ -186,7 +194,7 @@ int main(int argc, char *argv[])
         exit(0);
     }
     
-    disk = Disk::OpenFile(dfile);
+    disk = Disk::OpenFile(dfile, dos_order);
     
     if (!disk)
     {