[svn-r5879]

Purpose:
    Design for compact dataset
Description:
    Compact dataset is stored in the header message for dataset layout.
Platforms tested:
    arabica, eirene.

1 files changed, 121 insertions, 0 deletions

diff --git a/src/H5Dcompact.c b/src/H5Dcompact.c
new file mode 100644
index 0000000..3a36edb
--- /dev/null
+++ b/src/H5Dcompact.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2000-2001 NCSA
+ *                         All rights reserved.
+ *
+ * Programmer:  Raymond Lu <slu@ncsa.uiuc.edu> 
+ *              August 5, 2002 
+ *
+ * Purpose:     Compact dataset I/O functions.  These routines are similar
+ *              H5F_contig_* and H5F_istore_*.
+ */
+
+#define H5F_PACKAGE             /*suppress error about including H5Fpkg   */
+
+#include "H5private.h"
+#include "H5Eprivate.h"
+#include "H5Fpkg.h"
+#include "H5Oprivate.h"
+#include "H5FDprivate.h"        /*file driver                             */
+#include "H5FLprivate.h"        /*Free Lists                              */
+
+/* Interface initialization */
+#define PABLO_MASK      H5Fcompact_mask
+static int              interface_initialize_g = 0;
+#define INTERFACE_INIT NULL
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F_compact_readv
+ *
+ * Purpose:     Reads some data vectors from a dataset into a buffer.
+ *              The data is in compact dataset.  The address is relative 
+ *              to the beginning address of the dataset.  The offsets and
+ *              sequence lengths are in bytes.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Raymond Lu 
+ *              August 5, 2002 
+ *
+ * Notes:
+ *              Offsets in the sequences must be monotonically increasing
+ * 
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F_compact_readv(H5F_t *f, const H5O_layout_t *layout, size_t nseq, 
+                  size_t size_arr[], hsize_t offset_arr[], 
+                  hid_t dxpl_id, void *_buf/*out*/)
+{
+    unsigned char       *buf=(unsigned char *)_buf;
+    size_t              size;
+    haddr_t             offset;
+    unsigned            u;
+    herr_t              ret_value=SUCCEED;
+    
+    FUNC_ENTER_NOAPI(H5F_compact_readv, FAIL);
+
+    for(u=0; u<nseq; u++) {
+        size=size_arr[u];
+        offset=offset_arr[u];
+        if(size > 0) {
+            HDmemcpy(buf, (unsigned char*)layout->buf+offset, size); 
+            buf +=size;
+        }
+    }
+
+done:
+    FUNC_LEAVE(ret_value);
+}   /* end H5F_compact_readv() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F_compact_writev
+ * 
+ * Purpose:     Writes some data vectors from a dataset into a buffer.
+ *              The data is in compact dataset.  The address is relative 
+ *              to the beginning address for the file.  The offsets and
+ *              sequence lengths are in bytes.  This function only copies
+ *              data into the buffer in the LAYOUT struct and mark it 
+ *              as DIRTY.  Later in H5D_close, the data is copied into 
+ *              header message in memory.  
+ *              
+ * Return:      Non-negative on success/Negative on failure
+ * 
+ * Programmer:  Raymond Lu
+ *              August 5, 2002
+ *              
+ * Notes:       
+ *              Offsets in the sequences must be monotonically increasing
+ *              
+ * Modifications:
+ * 
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F_compact_writev(H5F_t *f, H5O_layout_t *layout, size_t nseq,
+                  size_t size_arr[], hsize_t offset_arr[], 
+                  hid_t dxpl_id, const void *_buf)
+{
+    unsigned char       *buf=(unsigned char *)_buf;
+    size_t              size;
+    haddr_t             offset;
+    unsigned            u;
+    herr_t              ret_value=SUCCEED;
+    
+    FUNC_ENTER_NOAPI(H5F_compact_writev, FAIL);
+
+    for(u=0; u<nseq; u++) {
+        size=size_arr[u];
+        offset=offset_arr[u];
+        if(size > 0) {
+            HDmemcpy((unsigned char*)layout->buf+offset, buf, size);
+            buf += size;
+        }
+    }
+
+    layout->dirty = TRUE;
+
+done:   
+    FUNC_LEAVE(ret_value);
+}   /* end H5F_compact_writev */