Tcl Library Procedures - Tcl_IntObj manual page

### NAME

Tcl_NewIntObj, Tcl_NewLongObj, Tcl_SetIntObj, Tcl_SetLongObj, Tcl_GetIntFromObj, Tcl_GetLongFromObj - manipulate Tcl objects as integers

### SYNOPSIS

#include <tcl.h>
Tcl_Obj *
Tcl_NewIntObj(intValue)
Tcl_Obj *
Tcl_NewLongObj(longValue)
Tcl_SetIntObj(objPtr, intValue)
Tcl_SetLongObj(objPtr, longValue)
int
Tcl_GetIntFromObj(interp, objPtr, intPtr)
int
Tcl_GetLongFromObj(interp, objPtr, longPtr)

### ARGUMENTS

int intValue (in)
  Integer value used to initialize or set an integer object.

long longValue (in)
  Long integer value used to initialize or set an integer object.

Tcl_Obj *objPtr (in/out)
  For Tcl_SetIntObj and Tcl_SetLongObj, this points to the object to be converted to integer type. For Tcl_GetIntFromObj and Tcl_GetLongFromObj, this refers to the object from which to get an integer or long integer value; if objPtr does not already point to an integer 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.

int *intPtr (out)
  Points to place to store the integer value obtained by Tcl_GetIntFromObj from objPtr.

long *longPtr (out)
  Points to place to store the long integer value obtained by Tcl_GetLongFromObj from objPtr.

### DESCRIPTION

These procedures are used to create, modify, and read integer Tcl objects from C code. Tcl_NewIntObj, Tcl_NewLongObj, Tcl_SetIntObj, and Tcl_SetLongObj create a new object of integer type or modify an existing object to have integer type. Tcl_NewIntObj and Tcl_SetIntObj set the object to have the integer value given by intValue, while Tcl_NewLongObj and Tcl_SetLongObj set the object to have the long integer value given by longValue. Tcl_NewIntObj and Tcl_NewLongObj return a pointer to a newly created object with reference count zero. These procedures set the object's type to be integer and assign the integer value to the object's internal representation longValue member. Tcl_SetIntObj and Tcl_SetLongObj invalidate any old string representation and, if the object is not already an integer object, free any old internal representation.

Tcl_GetIntFromObj and Tcl_GetLongFromObj attempt to return an integer value from the Tcl object objPtr. If the object is not already an integer object, they will attempt to convert it to one. If an error occurs during conversion, they return TCL_ERROR and leave an error message in the interpreter's result object unless interp is NULL. Also, if the long integer held in the object's internal representation longValue member can not be represented in a (non-long) integer, Tcl_GetIntFromObj returns TCL_ERROR and leaves an error message in the interpreter's result object unless interp is NULL. Otherwise, both procedures return TCL_OK and store the integer or the long integer value in the address given by intPtr and longPtr respectively. If the object is not already an integer object, the conversion will free any old internal representation.

### SEE ALSO

Tcl_NewObj, Tcl_DecrRefCount, Tcl_IncrRefCount, Tcl_GetObjResult

### KEYWORDS

integer, integer object, integer type, internal representation, object, object type, string representation

    Copyright © 1996-1997 Sun Microsystems, Inc.
    Copyright © 1995-1997 Roger E. Critchlow Jr.