Add functions to retrieve dim type interpretation byte count

Author: jimmysoda

source/pdal/pdalc_dimtype.cpp

@@ -31,6 +31,19 @@ namespace pdal
 			return size;
 		}
 
+		uint64_t PDALGetDimTypeListByteCount(PDALDimTypeListPtr types)
+		{
+			uint64_t byteCount = 0;
+			size_t pointCount = PDALGetDimTypeListSize(types);
+
+			for (size_t i = 0; i < pointCount; ++i)
+			{
+				byteCount += PDALGetDimTypeInterpretationByteCount(PDALGetDimType(types, i));
+			}
+
+			return byteCount;
+		}
+
 		PDALDimType PDALGetInvalidDimType()
 		{
 			PDALDimType dim ={
@@ -71,15 +84,16 @@ namespace pdal
 			return result;
 		}
 
+		size_t PDALGetDimTypeInterpretationByteCount(PDALDimType dim)
+		{
+			return pdal::Dimension::size(static_cast<pdal::Dimension::Type>(dim.type));
+		}
+
 		PDALDimType PDALGetDimType(PDALDimTypeListPtr types, size_t index)
 		{
 			pdal::capi::DimTypeList *wrapper = reinterpret_cast<pdal::capi::DimTypeList *>(types);
 
 			PDALDimType dim = PDALGetInvalidDimType();
-			// PDALDimType dim = {
-			// 	static_cast<uint32_t>(pdal::Dimension::id("")), static_cast<uint32_t>(pdal::Dimension::type("")),
-			// 	1.0, 0.0
-			// };
 
 			if (wrapper && wrapper->get())
 			{

source/pdal/pdalc_dimtype.h

@@ -29,6 +29,15 @@ namespace pdal
 			 */
 			PDALC_API size_t PDALGetDimTypeListSize(PDALDimTypeListPtr types);
 
+			/**
+			 * Returns the number of bytes required to store data referenced
+			 * by a dimension type list.
+			 * 
+			 * @param types A pointer to the dimension type list
+			 * @return The number of bytes required to store the referenced data
+			 */
+			PDALC_API uint64_t PDALGetDimTypeListByteCount(PDALDimTypeListPtr types);
+
 			/**
 			 * Returns the invalid dimension type. This dimension type has:
 			 * - An ID value of 0 that corresponds to pdal::Dimension::Id::Unknown
@@ -72,6 +81,14 @@ namespace pdal
 			 */
 			PDALC_API size_t PDALGetDimTypeInterpretationName(PDALDimType dim, char *name, size_t size);
 
+			/**
+			 * Retrieves the byte count of a dimension type's interpretation, i.e., its data size.
+			 * 
+			 * @param dim The dimension type
+			 * @return The byte count of the retrieved interpretation
+			 */
+			PDALC_API size_t PDALGetDimTypeInterpretationByteCount(PDALDimType dim);
+
 			/**
 			 * Disposes the provided dimension type list.
 			 * 

tests/pdal/test_pdalc_pointview.c.in

@@ -388,6 +388,8 @@ TEST testPDALGetAllPackedPoints(void)
 	size_t pointSize = PDALGetPointSize(layout);
 	ASSERT(numPoints > 0);
 	ASSERT(pointSize > 0);
+	ASSERT_EQ(pointSize, PDALGetDimTypeListByteCount(dims));
+
 
 	char *actualPoints = calloc(numPoints, pointSize);
 	ASSERT(actualPoints);