1 files changed, 100 insertions, 1 deletions

diff --git a/command_line/CmdLine/Src/OSLib/FileHandles.c b/command_line/CmdLine/Src/OSLib/FileHandles.c
index 4609d77..69b4b11 100644
--- a/command_line/CmdLine/Src/OSLib/FileHandles.c
+++ b/command_line/CmdLine/Src/OSLib/FileHandles.c
@@ -1,29 +1,128 @@
 #include "oslib.h"
+#include <errno.h>
 
 static int OS_LoadFileHandle(OSFileHandle *hand) {
+    int err;
+    int ref;
+    UInt32 sz;
+    void *buffer;
 
+    hand->loaded = 0;
+
+    err = OS_Open(&hand->spec, OSReadOnly, &ref);
+    if (!err) {
+        err = OS_GetSize(ref, &sz);
+        if (!err) {
+            err = OS_ResizeHandle(&hand->hand, sz);
+            if (!err) {
+                buffer = OS_LockHandle(&hand->hand);
+                err = OS_Read(ref, buffer, &sz);
+                if (!err) {
+                    hand->loaded = 1;
+                    hand->changed = 0;
+                }
+                OS_UnlockHandle(&hand->hand);
+            }
+        }
+        OS_Close(ref);
+    }
+
+    return err;
 }
 
 static int OS_WriteFileHandle(OSFileHandle *hand) {
+    int err;
+    int ref;
+    UInt32 sz;
+    void *buffer;
+
+    if (!hand->loaded && !hand->changed)
+        return 0;
 
+    OS_Delete(&hand->spec);
+    err = OS_Create(&hand->spec, &OS_TEXTTYPE);
+    if (!err) {
+        err = OS_Open(&hand->spec, OSReadWrite, &ref);
+        if (!err) {
+            err = OS_GetHandleSize(&hand->hand, &sz);
+            if (!err) {
+                buffer = OS_LockHandle(&hand->hand);
+                err = OS_Write(ref, buffer, &sz);
+                if (!err)
+                    hand->changed = 0;
+                OS_UnlockHandle(&hand->hand);
+                OS_Close(ref);
+            }
+        }
+    }
+
+    return err;
 }
 
 int OS_NewFileHandle(const OSSpec *spec, OSHandle *src, Boolean writeable, OSFileHandle *hand) {
+    int err;
+
+    if (!writeable && src)
+        return EACCES;
+
+    hand->spec = *spec;
+    hand->writeable = writeable;
 
+    if (!src) {
+        err = OS_NewHandle(0, &hand->hand);
+        if (err)
+            return err;
+        err = OS_LoadFileHandle(hand);
+    } else {
+        err = OS_CopyHandle(src, &hand->hand);
+        if (err)
+            return err;
+        hand->changed = 1;
+        hand->loaded = 1;
+    }
+
+    return err;
 }
 
 int OS_LockFileHandle(OSFileHandle *hand, Ptr *ptr, UInt32 *size) {
+    *size = 0;
+
+    if (!OS_ValidHandle(&hand->hand))
+        return ENOMEM;
 
+    *ptr = OS_LockHandle(&hand->hand);
+    OS_GetHandleSize(&hand->hand, size);
+    return 0;
 }
 
 int OS_UnlockFileHandle(OSFileHandle *hand) {
+    if (!OS_ValidHandle(&hand->hand))
+        return ENOMEM;
 
+    OS_UnlockHandle(&hand->hand);
+    return 0;
 }
 
 int OS_FreeFileHandle(OSFileHandle *hand) {
+    int err;
+
+    if (hand->writeable && hand->changed) {
+        err = OS_WriteFileHandle(hand);
+        if (err)
+            return err;
+    }
 
+    if (!OS_ValidHandle(&hand->hand))
+        return ENOMEM;
+
+    err = OS_FreeHandle(&hand->hand);
+    if (err)
+        return err;
+
+    hand->loaded = 0;
+    return 0;
 }
 
 void OS_GetFileHandleSpec(const OSFileHandle *hand, OSSpec *spec) {
-
+    *spec = hand->spec;
 }