GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
RedHat 9.0(Shrike) |
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Tcl_NewDoubleObj(3) |
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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)
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double doubleValue (in) |
A double-precision floating point value used to initialize or set a double object. | ||
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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. | ||
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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. | ||
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double *doublePtr (out) |
Points to place to store the double value obtained from objPtr. |
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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
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Tcl_NewDoubleObj(3) | |