[svn-r6395] Purpose:

    Code cleanup.

Description:
    Break up the ~9350 line H5T.c module into smaller pieces, which contain
    code for a particular feature or support for a datatype class.

    This should make the "main" H5T code (still in H5T.c) easier to support,
    as well as removing some of the "minor" routines from the user applications
    which don't use them (my rough estimates show about 4% reduction (~30K on
    a FreeBSD machine) in optimized, staticly-linked binaries for very simple
    programs)

Platforms tested:
    Tested h5committest {arabica (fortran), eirene (fortran, C++)
	modi4 (parallel, fortran)}

    FreeBSD 4.7 (sleipnir)

Misc. update:
    Update MANIFEST

1 files changed, 266 insertions, 0 deletions

diff --git a/src/H5Tprecis.c b/src/H5Tprecis.c
new file mode 100644
index 0000000..60a82aa
--- /dev/null
+++ b/src/H5Tprecis.c
@@ -0,0 +1,266 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
+ * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Module Info: This module contains the functionality for setting & querying
+ *      the datatype precision for the H5T interface.
+ */
+
+#define H5T_PACKAGE		/*suppress error about including H5Tpkg	  */
+
+#include "H5private.h"		/*generic functions			  */
+#include "H5Eprivate.h"		/*error handling			  */
+#include "H5Iprivate.h"		/*ID functions		   		  */
+#include "H5Tpkg.h"		/*data-type functions			  */
+
+#define PABLO_MASK	H5Tprecis_mask
+
+/* Interface initialization */
+static int interface_initialize_g = 0;
+#define INTERFACE_INIT H5T_init_precis_interface
+static herr_t H5T_init_precis_interface(void);
+
+/* Static local functions */
+static herr_t H5T_set_precision(H5T_t *dt, size_t prec);
+
+
+/*--------------------------------------------------------------------------
+NAME
+   H5T_init_precis_interface -- Initialize interface-specific information
+USAGE
+    herr_t H5T_init_precis_interface()
+   
+RETURNS
+    Non-negative on success/Negative on failure
+DESCRIPTION
+    Initializes any interface-specific data or routines.  (Just calls
+    H5T_init_iterface currently).
+
+--------------------------------------------------------------------------*/
+static herr_t
+H5T_init_precis_interface(void)
+{
+    FUNC_ENTER_NOINIT(H5T_init_precis_interface);
+
+    FUNC_LEAVE_NOAPI(H5T_init_interface());
+} /* H5T_init_precis_interface() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5Tget_precision
+ *
+ * Purpose:	Gets the precision of a data type.  The precision is
+ *		the number of significant bits which, unless padding is
+ *		present, is 8 times larger than the value returned by
+ *		H5Tget_size().
+ *
+ * Return:	Success:	Number of significant bits
+ *
+ *		Failure:	0 (all atomic types have at least one
+ *				significant bit)
+ *
+ * Programmer:	Robb Matzke
+ *		Wednesday, January  7, 1998
+ *
+ * Modifications:
+ * 	Robb Matzke, 22 Dec 1998
+ *	Also works for derived data types.
+ *
+ *-------------------------------------------------------------------------
+ */
+size_t
+H5Tget_precision(hid_t type_id)
+{
+    H5T_t	*dt = NULL;
+    size_t	ret_value;
+
+    FUNC_ENTER_API(H5Tget_precision, 0);
+    H5TRACE1("z","i",type_id);
+
+    /* Check args */
+    if (NULL == (dt = H5I_object_verify(type_id,H5I_DATATYPE)))
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not a data type");
+    if (dt->parent)
+        dt = dt->parent;	/*defer to parent*/
+    if (H5T_COMPOUND==dt->type || H5T_OPAQUE==dt->type || H5T_ARRAY==dt->type)
+	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, 0, "operation not defined for specified data type");
+    
+    /* Precision */
+    assert(H5T_is_atomic(dt));
+    ret_value = dt->u.atomic.prec;
+
+done:
+    FUNC_LEAVE_API(ret_value);
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5Tset_precision
+ *
+ * Purpose:	Sets the precision of a data type.  The precision is
+ *		the number of significant bits which, unless padding is
+ *		present, is 8 times larger than the value returned by
+ *		H5Tget_size().
+ *
+ *		If the precision is increased then the offset is decreased
+ *		and then the size is increased to insure that significant
+ *		bits do not "hang over" the edge of the data type.
+ *
+ *		The precision property of strings is read-only.
+ *
+ *		When decreasing the precision of a floating point type, set
+ *		the locations and sizes of the sign, mantissa, and exponent
+ *		fields first.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Wednesday, January  7, 1998
+ *
+ * Modifications:
+ * 	Robb Matzke, 22 Dec 1998
+ *	Moved real work to a private function.
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Tset_precision(hid_t type_id, size_t prec)
+{
+    H5T_t	*dt = NULL;
+    herr_t      ret_value=SUCCEED;       /* Return value */
+
+    FUNC_ENTER_API(H5Tset_precision, FAIL);
+    H5TRACE2("e","iz",type_id,prec);
+
+    /* Check args */
+    if (NULL == (dt = H5I_object_verify(type_id,H5I_DATATYPE)))
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type");
+    if (H5T_STATE_TRANSIENT!=dt->state)
+	HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "data type is read-only");
+    if (prec <= 0)
+	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "precision must be positive");
+    if (H5T_ENUM==dt->type && dt->u.enumer.nmembs>0)
+	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined");
+
+    /* Do the work */
+    if (H5T_set_precision(dt, prec)<0)
+	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set precision");
+
+done:
+    FUNC_LEAVE_API(ret_value);
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5T_set_precision
+ *
+ * Purpose:	Sets the precision of a data type.  The precision is
+ *		the number of significant bits which, unless padding is
+ *		present, is 8 times larger than the value returned by
+ *		H5Tget_size().
+ *
+ *		If the precision is increased then the offset is decreased
+ *		and then the size is increased to insure that significant
+ *		bits do not "hang over" the edge of the data type.
+ *
+ *		The precision property of strings is read-only.
+ *
+ *		When decreasing the precision of a floating point type, set
+ *		the locations and sizes of the sign, mantissa, and exponent
+ *		fields first.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Wednesday, January  7, 1998
+ *
+ * Modifications:
+ * 	Robb Matzke, 22 Dec 1998
+ *	Also works for derived data types.
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5T_set_precision(H5T_t *dt, size_t prec)
+{
+    size_t	offset, size;
+    herr_t      ret_value=SUCCEED;       /* Return value */
+
+    FUNC_ENTER_NOAPI(H5T_set_precision, FAIL);
+
+    /* Check args */
+    assert(dt);
+    assert(prec>0);
+    assert(H5T_ENUM!=dt->type || 0==dt->u.enumer.nmembs);
+
+    if (dt->parent) {
+	if (H5T_set_precision(dt->parent, prec)<0)
+	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set precision for base type");
+	dt->size = dt->parent->size;
+    } else {
+	if (H5T_COMPOUND==dt->type || H5T_OPAQUE==dt->type || H5T_ARRAY==dt->type) {
+	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not defined for specified data type");
+	} else if (H5T_ENUM==dt->type) {
+	    /*nothing*/
+	} else if (H5T_is_atomic(dt)) {
+	    /* Adjust the offset and size */
+	    offset = dt->u.atomic.offset;
+	    size = dt->size;
+	    if (prec > 8*size)
+                offset = 0;
+	    else if (offset+prec > 8 * size) offset = 8 * size - prec;
+	    if (prec > 8*size)
+                size = (prec+7) / 8;
+
+	    /* Check that things are still kosher */
+	    switch (dt->type) {
+	    case H5T_INTEGER:
+	    case H5T_TIME:
+	    case H5T_BITFIELD:
+		/* nothing to check */
+		break;
+
+	    case H5T_STRING:
+		HGOTO_ERROR(H5E_ARGS, H5E_UNSUPPORTED, FAIL, "precision for this type is read-only");
+
+	    case H5T_FLOAT:
+		/*
+		 * The sign, mantissa, and exponent fields should be adjusted
+		 * first when decreasing the precision of a floating point
+		 * type.
+		 */
+		if (dt->u.atomic.u.f.sign >= prec ||
+		    dt->u.atomic.u.f.epos + dt->u.atomic.u.f.esize > prec ||
+		    dt->u.atomic.u.f.mpos + dt->u.atomic.u.f.msize > prec) {
+		    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "adjust sign, mantissa, and exponent fields first");
+		}
+		break;
+
+	    default:
+		assert("not implemented yet" && 0);
+	    }
+
+	    /* Commit */
+	    dt->size = size;
+	    if (H5T_is_atomic(dt)) {
+		dt->u.atomic.offset = offset;
+		dt->u.atomic.prec = prec;
+	    }
+	}
+    }
+    
+done:
+    FUNC_LEAVE_NOAPI(ret_value);
+}
+