Tcl_NewDoubleObj, Tcl_SetDoubleObj, Tcl_GetDoubleFromObj - manipulate Tcl objects as floating-point values
#include <tcl.h>
Tcl_Obj *
Tcl_NewDoubleObj(doubleValue)
Tcl_SetDoubleObj(objPtr, doubleValue)
int
Tcl_GetDoubleFromObj(interp, objPtr, doublePtr)
- double doubleValue (in)
-
A double-precision floating point value used to initialize or set a double object.
- Tcl_Obj *objPtr (in/out)
-
For Tcl_SetDoubleObj, this points to the object to be converted
to double type.
For Tcl_GetDoubleFromObj, this refers to the object
from which to get a double value;
if objPtr does not already point to a double object,
an attempt will be made to convert it to one.
- Tcl_Interp *interp (in/out)
-
If an error occurs during conversion,
an error message is left in the interpreter's result object
unless interp is NULL.
- double *doublePtr (out)
-
Points to place to store the double value
obtained from objPtr.
These procedures are used to create, modify, and read
double Tcl objects from C code.
Tcl_NewDoubleObj and Tcl_SetDoubleObj
will create a new object of double type
or modify an existing object to have double type.
Both of these procedures set the object to have the
double-precision floating point value given by doubleValue;
Tcl_NewDoubleObj returns a pointer to a newly created object
with reference count zero.
Both procedures set the object's type to be double
and assign the double value to the object's internal representation
doubleValue member.
Tcl_SetDoubleObj invalidates any old string representation
and, if the object is not already a double object,
frees any old internal representation.
Tcl_GetDoubleFromObj attempts to return a double value
from the Tcl object objPtr.
If the object is not already a double object,
it will attempt to convert it to one.
If an error occurs during conversion, it returns TCL_ERROR
and leaves an error message in the interpreter's result object
unless interp is NULL.
Otherwise, it returns TCL_OK and stores the double value
in the address given by doublePtr.
If the object is not already a double object,
the conversion will free any old internal representation.
Tcl_NewObj, Tcl_DecrRefCount, Tcl_IncrRefCount, Tcl_GetObjResult
double, double object, double type, internal representation, object, object type, string representation
Copyright © 1996-1997 Sun Microsystems, Inc.
Copyright © 1995-1997 Roger E. Critchlow Jr.