03-23-2011
No, they're completely different... The variables in a C program start as binary, and one of sprintf's jobs is to convert binary into ASCII. You're converting binary numbers into an ASCII string then writing the ASCII string to file.
My example doesn't convert -- it writes the variable direct, as binary. You could read them in as ASCII with with fgets and sscanf, then just write them back out raw as binary.
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datas(3U) InterViews Reference Manual datas(3U)
NAME
ColorData, GSData, MobilityData, MoveData, VoidData - Data subclasses for storing common undo information
SYNOPSIS
#include <Unidraw/Commands/datas.h>
DESCRIPTION
The Unidraw library predefines several Data subclasses for storing common undo information: ColorData stores two PSColors (usually repre-
senting foreground and background colors), while GSData stores a complete set of graphics state in a FullGraphic object. MobilityData
stores the mobility and graphics state information needed to undo a change in mobility. MoveData stores a horizontal and vertical distance.
VoidData stores a void pointer as a useful alternative to deriving trivially from Data just to store one word of information.
COLORDATA PUBLIC OPERATIONS
ColorData(PSColor*, PSColor*)
Create a ColorData instance, supplying the PSColor objects it stores.
GSDATA PUBLIC OPERATIONS
GSData(Graphic*)
Create a GSData instance, supplying the Graphic object from which to copy a complete set of graphics state. The GSData constructor
copies this information into its _gs member, from whence it can be retrieved later.
MOBILITYDATA PUBLIC OPERATIONS
MobilityData(Mobility, Graphic*)
Create a MobilityData instance, supplying the mobility and a Graphic object from which to copy a complete set of graphics state.
The MobilityData constructor copies the graphic into its _gs member, from whence it can be retrieved later.
MOVEDATA PUBLIC OPERATIONS
MoveData(float, float)
Create a MoveData instance, supplying two floating point numbers that normally represent horizontal and vertical movement.
VOIDDATA PUBLIC OPERATIONS
VoidData(void*)
Create a VoidData instance, supplying a pointer to an object of unknown type.
SEE ALSO
Data(3U), Graphic(3U), globals(3U)
Unidraw 24 January 1991 datas(3U)