[svn-r3079] Purpose: bug fix - by C API

Description:
	The prototype of two C API functions, H5Tget_offset and
	H5Sget_simple_extent_npoints was changed to fix bug #446,
	resulting in the need for updating the two corresponding
	C++ API functions.

Solution:
	- Changed the return type of AtomType::getOffset from size_t
	  to int, and the error return value from 0 to -1.
	- Changed the return type of DataSpace::getSimpleExtentNpoints
	  from hsize_t to hssize_t, and the error value from 0 to -1.

Platforms tested:
	arabica (sparc-sun-solaris 2.7)

1 files changed, 7 insertions, 4 deletions

diff --git a/c++/src/H5AtomType.C b/c++/src/H5AtomType.C
index bab1ed3..bdd98b0 100644
--- a/c++/src/H5AtomType.C
+++ b/c++/src/H5AtomType.C
@@ -89,12 +89,15 @@ void AtomType::setPrecision( size_t precision ) const
 }
 
 // Retrieves the bit offset of the first significant bit. 
-size_t AtomType::getOffset() const
+// 12/05/00: due to C API change
+//	- return type changed from size_t to int
+//	- offset = -1 when failure occurs vs. 0
+int AtomType::getOffset() const
 {
-   size_t offset = H5Tget_offset( id );  // C routine
+   int offset = H5Tget_offset( id );  // C routine
 
-   // returns a positive offset value if successful
-   if( offset == 0 )
+   // returns a non-negative offset value if successful
+   if( offset == -1 )
    {
       throw DataTypeIException();
    }