I2BIN()

Convert Harbour numeric into signed short encoded bytes

Syntax

I2BIN( <nNumber> ) --> cBuffer

Arguments

<nNumber> is a numeric value to convert (decimal digits are ignored).

Returns

I2BIN() return two bytes character string that contain 16 bit encoded signed short integer (least significant byte first).

Description

I2BIN() is one of the low level binary conversion functions, those functions convert between Harbour numeric and a character representation of numeric value. I2BIN() take a numeric integer value and convert it into two bytes of encoded 16 bit signed short integer.

You might ask what is the need for such functions, well, first of all it allow you to read/write information from/to a binary file (like extracting information from DBF header), it is also a useful way to share information from source other than Harbour (C for instance).

I2BIN() is the opposite of BIN2I()

      // Update DBF "last update" date
      #include "fileio.ch"
      FUNCTION main()
      LOCAL nHandle, cYear, cMonth, cDay
      use test
      ? "Original update date is:", lupdate()
      close
      nHandle := fopen( "test.dbf", FO_READWRITE )
      IF nHandle > 0
         fseek( nHandle, 1, )
         cYear  := I2BIN( 68 )
         cMonth := I2BIN(  8 )
         cDay   := I2BIN(  1 )
         fwrite( nHandle, cYear , 1 )   // write only the first byte
         fwrite( nHandle, cMonth, 1 )
         fwrite( nHandle, cDay  , 1 )
         fclose( nHandle )
         use test
         ? "New update date is:", lupdate()
         close
      ELSE
         ? "Can not open file"
      ENDIF
      RETURN NIL

Status

Ready

Compliance

I2BIN() works exactly like CA-Clipper's I2BIN()

Files

Library is rtl

See Also

• BIN2I()
• BIN2L()
• BIN2U()
• BIN2W()
• L2BIN()
• W2BIN()
• WORD()
• U2BIN()
• FWRITE()