file::ReadInt

ReadInt

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

Description

It is used to support Little Endian and Big Endian read and write binary data .

Syntax

UINT ReadInt( void * pDestBuffer, int nDataTypeSize, UINT nItemCount, BOOL bIsLittleEndian = TRUE )

Parameters

pDestBuffer: [output] Destination's buffer of store the int value
nDataTypeSize: [input] Must be size of datatype, for integal, 1, 2 and 4, for float. 4 and 8.
nItemCount: [input] Number of data;
bIsLittleEndian: [input] TRUE, use Little Endian way, FALSE use Big Endian way, default value is TRUE.

Return

The number of items read from file.

Examples

EX1

#define INT32_ITEM_COUNT    2
#define INT16_ITEM_COUNT    4
// ASCII: A  B  C  D  1  2  3  4
// HEX  : 41 42 43 44 31 32 33 34
 
void file_ReadInt_ex1()
{
    file fil;
 
    short i16[INT16_ITEM_COUNT], i1[INT16_ITEM_COUNT], i3[INT16_ITEM_COUNT];   
    long i32[INT32_ITEM_COUNT], i2[INT32_ITEM_COUNT], i4[INT32_ITEM_COUNT];
 
    i16[0] = 0x4241;
    i16[1] = 0x4443;
    i16[2] = 0x3231;
    i16[3] = 0x3433;
 
    i32[0] = 0x44434241;
    i32[1] = 0x34333231;
 
    string strFile = "C:\\end.bin";
 
    if( fil.Open(strFile, file::modeCreate | file::modeWrite ) )
    {
        int i = fil.WriteInt(i16, sizeof(short), INT16_ITEM_COUNT); 
        i = fil.WriteInt(i32, sizeof(long), INT32_ITEM_COUNT);      
        i = fil.WriteInt(i16, sizeof(short), INT16_ITEM_COUNT, FALSE);      
        i = fil.WriteInt(i32, sizeof(long), INT32_ITEM_COUNT, FALSE);      
        fil.Close();        
    }
    else
    {
        string strPromptExist = "Before testing, please delete file: " + strFile;
        MessageBox( NULL, strPromptExist );
    }    
 
    if( fil.Open(strFile, file::modeRead|file::shareDenyWrite) )
    {
        int i = fil.ReadInt(i1, sizeof(short), INT16_ITEM_COUNT);  
        i = fil.ReadInt(i2, sizeof(long), INT32_ITEM_COUNT);                    
        i = fil.ReadInt(i3, sizeof(short), INT16_ITEM_COUNT, FALSE);       
        i = fil.ReadInt(i4, sizeof(long), INT32_ITEM_COUNT, FALSE);        
        fil.Close();
    }
}