convert_floating_by_format

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 header to Include
9 Reference

Description

Convert floating point by format.

Syntax

bool convert_floating_by_format( LPVOID lpOutputBuff, LPVOID lpInputBuff, size_t nNumValues, FLOATING_POINT_TYPE nOutputFormatType, FLOATING_POINT_TYPE nInputFormatType )

Parameters

lpOutputBuff: [output] A pointer to the buffer that receives the convert value
lpInputBuff: [input] A pointer to the buffer containing the data to convert
nNumValues: [input] number of floating points
nOutputFormatType: [input] output format type. See FLOATING_POINT_TYPE
nInputFormatType: [input] input format type. See FLOATING_POINT_TYPE

typedef enum
{
        FLOATING_POINT_TYPE_IEEE_FLOAT = 0,   // 32-bit
        FLOATING_POINT_TYPE_IEEE_DOUBLE,      // 64-bit

        FLOATING_POINT_TYPE_VAX_F,            // 32-bit, ~[-2.9E-39, 1.7E+38]
        FLOATING_POINT_TYPE_VAX_D,            // 64-bit, ~[-2.9E-39, 1.7E+38]
        FLOATING_POINT_TYPE_VAX_G,            // 64-bit, ~[-5.6E-309, 0.9E+308]
        // FLOATING_POINT_TYPE_VAX_H,         // 128-bit, NOT supported

        FLOATING_POINT_TYPE_IBM_SHORT,        // 32-bit
        FLOATING_POINT_TYPE_IBM_LONG,         // 64-bit
        FLOATING_POINT_TYPE_IBM_LONG_XPORT,   // 64-bit
} FLOATING_POINT_TYPE;

Return

true on success and false on failure.

Examples

EX1

void convert_floating_by_format_vax()
{
        unsigned int a[] = {0x268bc2d9, 0x015dc2d9};
        double f1[2];
        bool bRet = convert_floating_by_format(f1, a, 2, FLOATING_POINT_TYPE_IEEE_DOUBLE, FLOATING_POINT_TYPE_VAX_F);
        
        printf("f1[0]=%f\n", f1[0]);
        printf("f1[1]=%f\n", f1[1]);
        
        return;
}