[pypy-svn] r46493 - pypy/dist/pypy/translator/jvm/src/pypy

[antocuni at codespeak.net]

Author: antocuni
Date: Wed Sep 12 12:17:42 2007
New Revision: 46493

Modified:
   pypy/dist/pypy/translator/jvm/src/pypy/ll_os.java
Log:
ll_os_lseek for jvm



Modified: pypy/dist/pypy/translator/jvm/src/pypy/ll_os.java
==============================================================================
--- pypy/dist/pypy/translator/jvm/src/pypy/ll_os.java	(original)
+++ pypy/dist/pypy/translator/jvm/src/pypy/ll_os.java	Wed Sep 12 12:17:42 2007
@@ -10,6 +10,7 @@
     public abstract void write(String buffer);
     public abstract String read(int count);
     public abstract void close();
+    public abstract RandomAccessFile getFile();
 }
 
 class PrintStreamWrapper extends FileWrapper
@@ -36,6 +37,11 @@
     {
         ll_os.throwOSError(PyPy.EBADF, "Cannot close stdout or stderr");
     }
+
+    public RandomAccessFile getFile()
+    {
+        return null;
+    }
 }
 
 class InputStreamWrapper extends FileWrapper
@@ -69,6 +75,11 @@
     {
         ll_os.throwOSError(PyPy.EBADF, "Cannot close stdin");
     }
+
+    public RandomAccessFile getFile()
+    {
+        return null;
+    }
 }
 
 class RandomAccessFileWrapper extends FileWrapper
@@ -125,6 +136,11 @@
             ll_os.throwOSError(PyPy.EIO, e.getMessage());
         }
     }
+
+    public RandomAccessFile getFile()
+    {
+        return this.file;
+    }
 }
 
 
@@ -147,6 +163,10 @@
     private static final int S_IFDIR = 16384;
     private static final int S_IFREG = 32768;
 
+    private static final int SEEK_SET = 0;
+    private static final int SEEK_CUR = 1;
+    private static final int SEEK_END = 2;
+
     private static int fdcount;
     private static Map<Integer, FileWrapper> FileDescriptors = new HashMap<Integer, FileWrapper>();
     private static Map<Integer, String> ErrorMessages = new HashMap<Integer, String>();
@@ -240,6 +260,36 @@
         return ll_os_read(fd, (int)count);
     }
 
+    public static long ll_os_lseek(int fd, long offset, int whence)
+    {
+        FileWrapper wrapper = getfd(fd);
+        RandomAccessFile file = wrapper.getFile();
+        if (file == null)
+            throwOSError(PyPy.ESPIPE, "Illegal seek");
+
+        long pos = 0;
+        try {
+            switch(whence) 
+                {
+                case SEEK_SET:
+                    pos = offset;
+                    break;
+                case SEEK_CUR:
+                    pos = file.getFilePointer() + offset;
+                    break;
+                case SEEK_END:
+                    pos = file.length() + offset;
+                    break;
+                }
+            file.seek(pos);
+        }
+        catch(IOException e) {
+            throwOSError(PyPy.ESPIPE, e.getMessage());
+        }
+        
+        return pos;
+    }
+
     public static StatResult ll_os_lstat(String path)
     {
         return ll_os_stat(path); // XXX