___________________________
Tcl_NewIntObj, Tcl_NewLongObj, Tcl_NewWideIntObj, Tcl_SetIntObj, Tcl_SetLongObj, Tcl_SetWideIntObj, Tcl_GetIntFromObj, Tcl_GetLongFromObj, Tcl_GetWideIntFromObj, Tcl_NewBignumObj, Tcl_SetBignumObj, Tcl_GetBignumFromObj, Tcl_TakeBignumFromObj − manipulate Tcl objects as integer values
#include <tcl.h>
Tcl_Obj *
Tcl_NewIntObj(intValue)
Tcl_Obj *
Tcl_NewLongObj(longValue)
Tcl_Obj *
Tcl_NewWideIntObj(wideValue)
Tcl_SetIntObj(objPtr, intValue)
Tcl_SetLongObj(objPtr, longValue)
Tcl_SetWideIntObj(objPtr, wideValue)
int
Tcl_GetIntFromObj(interp, objPtr, intPtr)
int
Tcl_GetLongFromObj(interp, objPtr, longPtr)
int
Tcl_GetWideIntFromObj(interp, objPtr,
widePtr)
#include <tclTomMath.h> │
Tcl_Obj *
│
Tcl_NewBignumObj(bigValue) │
Tcl_SetBignumObj(objPtr, bigValue) │
int
│
Tcl_GetBignumFromObj(interp, objPtr, bigValue)
│
int
│
Tcl_TakeBignumFromObj(interp, objPtr, bigValue)
│
int
│
Tcl_InitBignumFromDouble(interp, doubleValue,
bigValue) │
int intValue (in) |
Integer value used to initialize or set a Tcl object. | ||
long longValue (in) |
Long integer value used to initialize or set a Tcl object. | ||
Tcl_WideInt wideValue (in) |
Wide integer value used to initialize or set a Tcl object. | ||
Tcl_Obj *objPtr (in/out) |
For Tcl_SetIntObj, Tcl_SetLongObj, Tcl_SetWideIntObj, and Tcl_SetBignumObj, this points to the object in which to store an integral value. For Tcl_GetIntFromObj, Tcl_GetLongFromObj, Tcl_GetWideIntFromObj, Tcl_GetBignumFromObj, and Tcl_TakeBignumFromObj, this refers to the object from which to retrieve an integral value. | ||
Tcl_Interp *interp (in/out) |
When non-NULL, an error message is left here when integral value retrieval fails. | ||
int *intPtr (out) |
Points to place to store the integer value retrieved from objPtr. | ||
long *longPtr (out) |
Points to place to store the long integer value retrieved from objPtr. | ||
Tcl_WideInt *widePtr (out) |
Points to place to store the wide integer value retrieved from objPtr. | ||
mp_int *bigValue (in/out) |
Points to a multi-precision │ integer structure declared by the │ LibTomMath library. | ||
double doubleValue (in) |
Double value from which the │ integer part is determined and │ used to initialize a │ multi-precision integer value. |
______________
These procedures are used to create, modify, and read Tcl objects that │ hold integral values. │
The different routines exist to accommodate different integral types in │ C with which values might be exchanged. The C integral types for which │ Tcl provides value exchange routines are int, long int, Tcl_WideInt, │ and mp_int. The int and long int types are provided by the C language │ standard. The Tcl_WideInt type is a typedef defined to be whatever │ signed integral type covers at least the 64-bit integer range │ (-9223372036854775808 to 9223372036854775807). Depending on the │ platform and the C compiler, the actual type might be long int, long │ long int, int64, or something else. The mp_int type is a │ multiple-precision integer type defined by the LibTomMath │ multiple-precision integer library. │
The Tcl_NewIntObj, Tcl_NewLongObj, Tcl_NewWideIntObj, and │ Tcl_NewBignumObj routines each create and return a new Tcl object │ initialized to the integral value of the argument. The returned Tcl │ object is unshared. │
The Tcl_SetIntObj, Tcl_SetLongObj, Tcl_SetWideIntObj, and │ Tcl_SetBignumObj routines each set the value of an existing Tcl object │ pointed to by objPtr to the integral value provided by the other │ argument. The objPtr argument must point to an unshared Tcl object. │ Any attempt to set the value of a shared Tcl object violates Tcl’s │ copy-on-write policy. Any existing string representation or internal │ representation in the unshared Tcl object will be freed as a │ consequence of setting the new value. │
The Tcl_GetIntFromObj, Tcl_GetLongFromObj, Tcl_GetWideIntFromObj, │ Tcl_GetBignumFromObj, and Tcl_TakeBignumFromObj routines attempt to │ retrieve an integral value of the appropriate type from the Tcl object │ objPtr. If the attempt succeeds, then TCL_OK is returned, and the │ value is written to the storage provided by the caller. The attempt │ might fail if objPtr does not hold an integral value, or if the value │ exceeds the range of the target type. If the attempt fails, then │ TCL_ERROR is returned, and if interp is non-NULL, an error message is │ left in interp. The Tcl_ObjType of objPtr may be changed to make │ subsequent calls to the same routine more efficient. Unlike the other │ functions, Tcl_TakeBignumFromObj may set the content of the Tcl object │ objPtr to an empty string in the process of retrieving the │ multiple-precision integer value. │
The choice between Tcl_GetBignumFromObj and Tcl_TakeBignumFromObj is │ governed by how the caller will continue to use objPtr. If after the │ mp_int value is retrieved from objPtr, the caller will make no more use │ of objPtr, then using Tcl_TakeBignumFromObj permits Tcl to detect when │ an unshared objPtr permits the value to be moved instead of copied, │ which should be more efficient. If anything later in the caller │ requires objPtr to continue to hold the same value, then │ Tcl_GetBignumFromObj must be chosen. │
The Tcl_InitBignumFromDouble routine is a utility procedure that │ extracts the integer part of doubleValue and stores that integer value │ in the mp_int value bigValue.
Tcl_NewObj, Tcl_DecrRefCount, Tcl_IncrRefCount, Tcl_GetObjResult
integer, integer object, integer type, internal representation, object, object type, string representation
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.