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|
/*
* tclObj.c --
*
* This file contains Tcl object-related procedures that are used by
* many Tcl commands.
*
* Copyright (c) 1995-1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclObj.c,v 1.1.2.6.2.1 1999/03/08 20:14:10 stanton Exp $
*/
#include "tclInt.h"
#include "tclPort.h"
/*
* Table of all object types.
*/
static Tcl_HashTable typeTable;
static int typeTableInitialized = 0; /* 0 means not yet initialized. */
TCL_DECLARE_MUTEX(tableMutex)
/*
* Head of the list of free Tcl_Objs we maintain.
*/
Tcl_Obj *tclFreeObjList = NULL;
/*
* The object allocator is single threaded. This mutex is referenced
* by the TclNewObj macro, however, so must be visible.
*/
#ifdef TCL_THREADS
Tcl_Mutex tclObjMutex;
#endif
/*
* Pointer to a heap-allocated string of length zero that the Tcl core uses
* as the value of an empty string representation for an object. This value
* is shared by all new objects allocated by Tcl_NewObj.
*/
static char emptyString;
char *tclEmptyStringRep = &emptyString;
/*
* The number of Tcl objects ever allocated (by Tcl_NewObj) and freed
* (by TclFreeObj).
*/
#ifdef TCL_COMPILE_STATS
long tclObjsAlloced = 0;
long tclObjsFreed = 0;
#endif /* TCL_COMPILE_STATS */
/*
* Prototypes for procedures defined later in this file:
*/
static int SetBooleanFromAny _ANSI_ARGS_((Tcl_Interp *interp,
Tcl_Obj *objPtr));
static int SetDoubleFromAny _ANSI_ARGS_((Tcl_Interp *interp,
Tcl_Obj *objPtr));
static int SetIntFromAny _ANSI_ARGS_((Tcl_Interp *interp,
Tcl_Obj *objPtr));
static void UpdateStringOfBoolean _ANSI_ARGS_((Tcl_Obj *objPtr));
static void UpdateStringOfDouble _ANSI_ARGS_((Tcl_Obj *objPtr));
static void UpdateStringOfInt _ANSI_ARGS_((Tcl_Obj *objPtr));
/*
* The structures below defines the Tcl object types defined in this file by
* means of procedures that can be invoked by generic object code. See also
* tclStringObj.c, tclListObj.c, tclByteCode.c for other type manager
* implementations.
*/
Tcl_ObjType tclBooleanType = {
"boolean", /* name */
(Tcl_FreeInternalRepProc *) NULL, /* freeIntRepProc */
(Tcl_DupInternalRepProc *) NULL, /* dupIntRepProc */
UpdateStringOfBoolean, /* updateStringProc */
SetBooleanFromAny /* setFromAnyProc */
};
Tcl_ObjType tclDoubleType = {
"double", /* name */
(Tcl_FreeInternalRepProc *) NULL, /* freeIntRepProc */
(Tcl_DupInternalRepProc *) NULL, /* dupIntRepProc */
UpdateStringOfDouble, /* updateStringProc */
SetDoubleFromAny /* setFromAnyProc */
};
Tcl_ObjType tclIntType = {
"int", /* name */
(Tcl_FreeInternalRepProc *) NULL, /* freeIntRepProc */
(Tcl_DupInternalRepProc *) NULL, /* dupIntRepProc */
UpdateStringOfInt, /* updateStringProc */
SetIntFromAny /* setFromAnyProc */
};
/*
*-------------------------------------------------------------------------
*
* TclInitObjectSubsystem --
*
* This procedure is invoked to perform once-only initialization of
* the type table. It also registers the object types defined in
* this file.
*
* Results:
* None.
*
* Side effects:
* Initializes the table of defined object types "typeTable" with
* builtin object types defined in this file.
*
*-------------------------------------------------------------------------
*/
void
TclInitObjSubsystem()
{
Tcl_MutexLock(&tableMutex);
typeTableInitialized = 1;
Tcl_InitHashTable(&typeTable, TCL_STRING_KEYS);
Tcl_MutexUnlock(&tableMutex);
Tcl_RegisterObjType(&tclBooleanType);
Tcl_RegisterObjType(&tclByteArrayType);
Tcl_RegisterObjType(&tclDoubleType);
Tcl_RegisterObjType(&tclIntType);
Tcl_RegisterObjType(&tclStringType);
Tcl_RegisterObjType(&tclListType);
Tcl_RegisterObjType(&tclByteCodeType);
Tcl_RegisterObjType(&tclProcBodyType);
#ifdef TCL_COMPILE_STATS
Tcl_MutexLock(&tclObjMutex);
tclObjsAlloced = 0;
tclObjsFreed = 0;
Tcl_MutexUnlock(&tclObjMutex);
#endif
}
/*
*----------------------------------------------------------------------
*
* TclFinalizeCompExecEnv --
*
* This procedure is called by Tcl_Finalize to clean up the Tcl
* compilation and execution environment so it can later be properly
* reinitialized.
*
* Results:
* None.
*
* Side effects:
* Cleans up the compilation and execution environment
*
*----------------------------------------------------------------------
*/
void
TclFinalizeCompExecEnv()
{
Tcl_MutexLock(&tableMutex);
if (typeTableInitialized) {
Tcl_DeleteHashTable(&typeTable);
typeTableInitialized = 0;
}
Tcl_MutexUnlock(&tableMutex);
Tcl_MutexLock(&tclObjMutex);
tclFreeObjList = NULL;
Tcl_MutexUnlock(&tclObjMutex);
TclFinalizeCompilation();
TclFinalizeExecution();
}
/*
*--------------------------------------------------------------
*
* Tcl_RegisterObjType --
*
* This procedure is called to register a new Tcl object type
* in the table of all object types supported by Tcl.
*
* Results:
* None.
*
* Side effects:
* The type is registered in the Tcl type table. If there was already
* a type with the same name as in typePtr, it is replaced with the
* new type.
*
*--------------------------------------------------------------
*/
void
Tcl_RegisterObjType(typePtr)
Tcl_ObjType *typePtr; /* Information about object type;
* storage must be statically
* allocated (must live forever). */
{
register Tcl_HashEntry *hPtr;
int new;
/*
* If there's already an object type with the given name, remove it.
*/
Tcl_MutexLock(&tableMutex);
hPtr = Tcl_FindHashEntry(&typeTable, typePtr->name);
if (hPtr != (Tcl_HashEntry *) NULL) {
Tcl_DeleteHashEntry(hPtr);
}
/*
* Now insert the new object type.
*/
hPtr = Tcl_CreateHashEntry(&typeTable, typePtr->name, &new);
if (new) {
Tcl_SetHashValue(hPtr, typePtr);
}
Tcl_MutexUnlock(&tableMutex);
}
/*
*----------------------------------------------------------------------
*
* Tcl_AppendAllObjTypes --
*
* This procedure appends onto the argument object the name of each
* object type as a list element. This includes the builtin object
* types (e.g. int, list) as well as those added using
* Tcl_CreateObjType. These names can be used, for example, with
* Tcl_GetObjType to get pointers to the corresponding Tcl_ObjType
* structures.
*
* Results:
* The return value is normally TCL_OK; in this case the object
* referenced by objPtr has each type name appended to it. If an
* error occurs, TCL_ERROR is returned and the interpreter's result
* holds an error message.
*
* Side effects:
* If necessary, the object referenced by objPtr is converted into
* a list object.
*
*----------------------------------------------------------------------
*/
int
Tcl_AppendAllObjTypes(interp, objPtr)
Tcl_Interp *interp; /* Interpreter used for error reporting. */
Tcl_Obj *objPtr; /* Points to the Tcl object onto which the
* name of each registered type is appended
* as a list element. */
{
register Tcl_HashEntry *hPtr;
Tcl_HashSearch search;
Tcl_ObjType *typePtr;
int result;
/*
* This code assumes that types names do not contain embedded NULLs.
*/
Tcl_MutexLock(&tableMutex);
for (hPtr = Tcl_FirstHashEntry(&typeTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
typePtr = (Tcl_ObjType *) Tcl_GetHashValue(hPtr);
result = Tcl_ListObjAppendElement(interp, objPtr,
Tcl_NewStringObj(typePtr->name, -1));
if (result == TCL_ERROR) {
Tcl_MutexUnlock(&tableMutex);
return result;
}
}
Tcl_MutexUnlock(&tableMutex);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetObjType --
*
* This procedure looks up an object type by name.
*
* Results:
* If an object type with name matching "typeName" is found, a pointer
* to its Tcl_ObjType structure is returned; otherwise, NULL is
* returned.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
Tcl_ObjType *
Tcl_GetObjType(typeName)
char *typeName; /* Name of Tcl object type to look up. */
{
register Tcl_HashEntry *hPtr;
Tcl_ObjType *typePtr;
Tcl_MutexLock(&tableMutex);
hPtr = Tcl_FindHashEntry(&typeTable, typeName);
if (hPtr != (Tcl_HashEntry *) NULL) {
typePtr = (Tcl_ObjType *) Tcl_GetHashValue(hPtr);
Tcl_MutexUnlock(&tableMutex);
return typePtr;
}
Tcl_MutexUnlock(&tableMutex);
return NULL;
}
/*
*----------------------------------------------------------------------
*
* Tcl_ConvertToType --
*
* Convert the Tcl object "objPtr" to have type "typePtr" if possible.
*
* Results:
* The return value is TCL_OK on success and TCL_ERROR on failure. If
* TCL_ERROR is returned, then the interpreter's result contains an
* error message unless "interp" is NULL. Passing a NULL "interp"
* allows this procedure to be used as a test whether the conversion
* could be done (and in fact was done).
*
* Side effects:
* Any internal representation for the old type is freed.
*
*----------------------------------------------------------------------
*/
int
Tcl_ConvertToType(interp, objPtr, typePtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
Tcl_Obj *objPtr; /* The object to convert. */
Tcl_ObjType *typePtr; /* The target type. */
{
if (objPtr->typePtr == typePtr) {
return TCL_OK;
}
/*
* Use the target type's Tcl_SetFromAnyProc to set "objPtr"s internal
* form as appropriate for the target type. This frees the old internal
* representation.
*/
return typePtr->setFromAnyProc(interp, objPtr);
}
/*
*----------------------------------------------------------------------
*
* Tcl_NewObj --
*
* This procedure is normally called when not debugging: i.e., when
* TCL_MEM_DEBUG is not defined. It creates new Tcl objects that denote
* the empty string. These objects have a NULL object type and NULL
* string representation byte pointer. Type managers call this routine
* to allocate new objects that they further initialize.
*
* When TCL_MEM_DEBUG is defined, this procedure just returns the
* result of calling the debugging version Tcl_DbNewObj.
*
* Results:
* The result is a newly allocated object that represents the empty
* string. The new object's typePtr is set NULL and its ref count
* is set to 0.
*
* Side effects:
* If compiling with TCL_COMPILE_STATS, this procedure increments
* the global count of allocated objects (tclObjsAlloced).
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
#undef Tcl_NewObj
Tcl_Obj *
Tcl_NewObj()
{
return Tcl_DbNewObj("unknown", 0);
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_NewObj()
{
register Tcl_Obj *objPtr;
/*
* Allocate the object using the list of free Tcl_Objs we maintain.
*/
Tcl_MutexLock(&tclObjMutex);
if (tclFreeObjList == NULL) {
TclAllocateFreeObjects();
}
objPtr = tclFreeObjList;
tclFreeObjList = (Tcl_Obj *) tclFreeObjList->internalRep.otherValuePtr;
objPtr->refCount = 0;
objPtr->bytes = tclEmptyStringRep;
objPtr->length = 0;
objPtr->typePtr = NULL;
#ifdef TCL_COMPILE_STATS
tclObjsAlloced++;
#endif /* TCL_COMPILE_STATS */
Tcl_MutexUnlock(&tclObjMutex);
return objPtr;
}
#endif /* TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_DbNewObj --
*
* This procedure is normally called when debugging: i.e., when
* TCL_MEM_DEBUG is defined. It creates new Tcl objects that denote the
* empty string. It is the same as the Tcl_NewObj procedure above
* except that it calls Tcl_DbCkalloc directly with the file name and
* line number from its caller. This simplifies debugging since then
* the checkmem command will report the correct file name and line
* number when reporting objects that haven't been freed.
*
* When TCL_MEM_DEBUG is not defined, this procedure just returns the
* result of calling Tcl_NewObj.
*
* Results:
* The result is a newly allocated that represents the empty string.
* The new object's typePtr is set NULL and its ref count is set to 0.
*
* Side effects:
* If compiling with TCL_COMPILE_STATS, this procedure increments
* the global count of allocated objects (tclObjsAlloced).
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
Tcl_Obj *
Tcl_DbNewObj(file, line)
register char *file; /* The name of the source file calling this
* procedure; used for debugging. */
register int line; /* Line number in the source file; used
* for debugging. */
{
register Tcl_Obj *objPtr;
/*
* If debugging Tcl's memory usage, allocate the object using ckalloc.
* Otherwise, allocate it using the list of free Tcl_Objs we maintain.
*/
objPtr = (Tcl_Obj *) Tcl_DbCkalloc(sizeof(Tcl_Obj), file, line);
objPtr->refCount = 0;
objPtr->bytes = tclEmptyStringRep;
objPtr->length = 0;
objPtr->typePtr = NULL;
#ifdef TCL_COMPILE_STATS
Tcl_MutexLock(&tclObjMutex);
tclObjsAlloced++;
Tcl_MutexUnlock(&tclObjMutex);
#endif /* TCL_COMPILE_STATS */
return objPtr;
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_DbNewObj(file, line)
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
return Tcl_NewObj();
}
#endif /* TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* TclAllocateFreeObjects --
*
* Procedure to allocate a number of free Tcl_Objs. This is done using
* a single ckalloc to reduce the overhead for Tcl_Obj allocation.
*
* Assumes mutex is held.
*
* Results:
* None.
*
* Side effects:
* tclFreeObjList, the head of the list of free Tcl_Objs, is set to the
* first of a number of free Tcl_Obj's linked together by their
* internalRep.otherValuePtrs.
*
*----------------------------------------------------------------------
*/
#define OBJS_TO_ALLOC_EACH_TIME 100
void
TclAllocateFreeObjects()
{
Tcl_Obj tmp[2];
size_t objSizePlusPadding = /* NB: this assumes byte addressing. */
((int)(&(tmp[1])) - (int)(&(tmp[0])));
size_t bytesToAlloc = (OBJS_TO_ALLOC_EACH_TIME * objSizePlusPadding);
char *basePtr;
register Tcl_Obj *prevPtr, *objPtr;
register int i;
basePtr = (char *) ckalloc(bytesToAlloc);
memset(basePtr, 0, bytesToAlloc);
prevPtr = NULL;
objPtr = (Tcl_Obj *) basePtr;
for (i = 0; i < OBJS_TO_ALLOC_EACH_TIME; i++) {
objPtr->internalRep.otherValuePtr = (VOID *) prevPtr;
prevPtr = objPtr;
objPtr = (Tcl_Obj *) (((char *)objPtr) + objSizePlusPadding);
}
tclFreeObjList = prevPtr;
}
#undef OBJS_TO_ALLOC_EACH_TIME
/*
*----------------------------------------------------------------------
*
* TclFreeObj --
*
* This procedure frees the memory associated with the argument
* object. It is called by the tcl.h macro Tcl_DecrRefCount when an
* object's ref count is zero. It is only "public" since it must
* be callable by that macro wherever the macro is used. It should not
* be directly called by clients.
*
* Results:
* None.
*
* Side effects:
* Deallocates the storage for the object's Tcl_Obj structure
* after deallocating the string representation and calling the
* type-specific Tcl_FreeInternalRepProc to deallocate the object's
* internal representation. If compiling with TCL_COMPILE_STATS,
* this procedure increments the global count of freed objects
* (tclObjsFreed).
*
*----------------------------------------------------------------------
*/
void
TclFreeObj(objPtr)
register Tcl_Obj *objPtr; /* The object to be freed. */
{
register Tcl_ObjType *typePtr = objPtr->typePtr;
#ifdef TCL_MEM_DEBUG
if ((objPtr)->refCount < -1) {
panic("Reference count for %lx was negative", objPtr);
}
#endif /* TCL_MEM_DEBUG */
if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
typePtr->freeIntRepProc(objPtr);
}
Tcl_InvalidateStringRep(objPtr);
/*
* If debugging Tcl's memory usage, deallocate the object using ckfree.
* Otherwise, deallocate it by adding it onto the list of free
* Tcl_Objs we maintain.
*/
Tcl_MutexLock(&tclObjMutex);
#ifdef TCL_MEM_DEBUG
ckfree((char *) objPtr);
#else
objPtr->internalRep.otherValuePtr = (VOID *) tclFreeObjList;
tclFreeObjList = objPtr;
#endif /* TCL_MEM_DEBUG */
#ifdef TCL_COMPILE_STATS
tclObjsFreed++;
#endif /* TCL_COMPILE_STATS */
Tcl_MutexUnlock(&tclObjMutex);
}
/*
*----------------------------------------------------------------------
*
* Tcl_DuplicateObj --
*
* Create and return a new object that is a duplicate of the argument
* object.
*
* Results:
* The return value is a pointer to a newly created Tcl_Obj. This
* object has reference count 0 and the same type, if any, as the
* source object objPtr. Also:
* 1) If the source object has a valid string rep, we copy it;
* otherwise, the duplicate's string rep is set NULL to mark
* it invalid.
* 2) If the source object has an internal representation (i.e. its
* typePtr is non-NULL), the new object's internal rep is set to
* a copy; otherwise the new internal rep is marked invalid.
*
* Side effects:
* What constitutes "copying" the internal representation depends on
* the type. For example, if the argument object is a list,
* the element objects it points to will not actually be copied but
* will be shared with the duplicate list. That is, the ref counts of
* the element objects will be incremented.
*
*----------------------------------------------------------------------
*/
Tcl_Obj *
Tcl_DuplicateObj(objPtr)
register Tcl_Obj *objPtr; /* The object to duplicate. */
{
register Tcl_ObjType *typePtr = objPtr->typePtr;
register Tcl_Obj *dupPtr;
TclNewObj(dupPtr);
if (objPtr->bytes == NULL) {
dupPtr->bytes = NULL;
} else if (objPtr->bytes != tclEmptyStringRep) {
int len = objPtr->length;
dupPtr->bytes = (char *) ckalloc((unsigned) len+1);
if (len > 0) {
memcpy((VOID *) dupPtr->bytes, (VOID *) objPtr->bytes,
(unsigned) len);
}
dupPtr->bytes[len] = '\0';
dupPtr->length = len;
}
if (typePtr != NULL) {
if (typePtr->dupIntRepProc == NULL) {
dupPtr->internalRep = objPtr->internalRep;
dupPtr->typePtr = typePtr;
} else {
(*typePtr->dupIntRepProc)(objPtr, dupPtr);
}
}
return dupPtr;
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetString --
*
* Returns the string representation byte array pointer for an object.
*
* Results:
* Returns a pointer to the string representation of objPtr. The byte
* array referenced by the returned pointer must not be modified by the
* caller. Furthermore, the caller must copy the bytes if they need to
* retain them since the object's string rep can change as a result of
* other operations.
*
* Side effects:
* May call the object's updateStringProc to update the string
* representation from the internal representation.
*
*----------------------------------------------------------------------
*/
char *
Tcl_GetString(objPtr)
register Tcl_Obj *objPtr; /* Object whose string rep byte pointer
* should be returned. */
{
if (objPtr->bytes != NULL) {
return objPtr->bytes;
}
if (objPtr->typePtr->updateStringProc == NULL) {
panic("UpdateStringProc should not be invoked for type %s",
objPtr->typePtr->name);
}
(*objPtr->typePtr->updateStringProc)(objPtr);
return objPtr->bytes;
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetStringFromObj --
*
* Returns the string representation's byte array pointer and length
* for an object.
*
* Results:
* Returns a pointer to the string representation of objPtr. If
* lengthPtr isn't NULL, the length of the string representation is
* stored at *lengthPtr. The byte array referenced by the returned
* pointer must not be modified by the caller. Furthermore, the
* caller must copy the bytes if they need to retain them since the
* object's string rep can change as a result of other operations.
*
* Side effects:
* May call the object's updateStringProc to update the string
* representation from the internal representation.
*
*----------------------------------------------------------------------
*/
char *
Tcl_GetStringFromObj(objPtr, lengthPtr)
register Tcl_Obj *objPtr; /* Object whose string rep byte pointer
* should be returned. */
register int *lengthPtr; /* If non-NULL, the location where the
* string rep's byte array length should be
* stored. If NULL, no length is stored. */
{
if (objPtr->bytes != NULL) {
if (lengthPtr != NULL) {
*lengthPtr = objPtr->length;
}
return objPtr->bytes;
}
if (objPtr->typePtr->updateStringProc == NULL) {
panic("UpdateStringProc should not be invoked for type %s",
objPtr->typePtr->name);
}
(*objPtr->typePtr->updateStringProc)(objPtr);
if (lengthPtr != NULL) {
*lengthPtr = objPtr->length;
}
return objPtr->bytes;
}
/*
*----------------------------------------------------------------------
*
* Tcl_InvalidateStringRep --
*
* This procedure is called to invalidate an object's string
* representation.
*
* Results:
* None.
*
* Side effects:
* Deallocates the storage for any old string representation, then
* sets the string representation NULL to mark it invalid.
*
*----------------------------------------------------------------------
*/
void
Tcl_InvalidateStringRep(objPtr)
register Tcl_Obj *objPtr; /* Object whose string rep byte pointer
* should be freed. */
{
if (objPtr->bytes != NULL) {
if (objPtr->bytes != tclEmptyStringRep) {
ckfree((char *) objPtr->bytes);
}
objPtr->bytes = NULL;
}
}
/*
*----------------------------------------------------------------------
*
* Tcl_NewBooleanObj --
*
* This procedure is normally called when not debugging: i.e., when
* TCL_MEM_DEBUG is not defined. It creates a new boolean object and
* initializes it from the argument boolean value. A nonzero
* "boolValue" is coerced to 1.
*
* When TCL_MEM_DEBUG is defined, this procedure just returns the
* result of calling the debugging version Tcl_DbNewBooleanObj.
*
* Results:
* The newly created object is returned. This object will have an
* invalid string representation. The returned object has ref count 0.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
#undef Tcl_NewBooleanObj
Tcl_Obj *
Tcl_NewBooleanObj(boolValue)
register int boolValue; /* Boolean used to initialize new object. */
{
return Tcl_DbNewBooleanObj(boolValue, "unknown", 0);
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_NewBooleanObj(boolValue)
register int boolValue; /* Boolean used to initialize new object. */
{
register Tcl_Obj *objPtr;
TclNewObj(objPtr);
objPtr->bytes = NULL;
objPtr->internalRep.longValue = (boolValue? 1 : 0);
objPtr->typePtr = &tclBooleanType;
return objPtr;
}
#endif /* TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_DbNewBooleanObj --
*
* This procedure is normally called when debugging: i.e., when
* TCL_MEM_DEBUG is defined. It creates new boolean objects. It is the
* same as the Tcl_NewBooleanObj procedure above except that it calls
* Tcl_DbCkalloc directly with the file name and line number from its
* caller. This simplifies debugging since then the checkmem command
* will report the correct file name and line number when reporting
* objects that haven't been freed.
*
* When TCL_MEM_DEBUG is not defined, this procedure just returns the
* result of calling Tcl_NewBooleanObj.
*
* Results:
* The newly created object is returned. This object will have an
* invalid string representation. The returned object has ref count 0.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
Tcl_Obj *
Tcl_DbNewBooleanObj(boolValue, file, line)
register int boolValue; /* Boolean used to initialize new object. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
register Tcl_Obj *objPtr;
TclDbNewObj(objPtr, file, line);
objPtr->bytes = NULL;
objPtr->internalRep.longValue = (boolValue? 1 : 0);
objPtr->typePtr = &tclBooleanType;
return objPtr;
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_DbNewBooleanObj(boolValue, file, line)
register int boolValue; /* Boolean used to initialize new object. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
return Tcl_NewBooleanObj(boolValue);
}
#endif /* TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_SetBooleanObj --
*
* Modify an object to be a boolean object and to have the specified
* boolean value. A nonzero "boolValue" is coerced to 1.
*
* Results:
* None.
*
* Side effects:
* The object's old string rep, if any, is freed. Also, any old
* internal rep is freed.
*
*----------------------------------------------------------------------
*/
void
Tcl_SetBooleanObj(objPtr, boolValue)
register Tcl_Obj *objPtr; /* Object whose internal rep to init. */
register int boolValue; /* Boolean used to set object's value. */
{
register Tcl_ObjType *oldTypePtr = objPtr->typePtr;
if (Tcl_IsShared(objPtr)) {
panic("Tcl_SetBooleanObj called with shared object");
}
Tcl_InvalidateStringRep(objPtr);
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) {
oldTypePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.longValue = (boolValue? 1 : 0);
objPtr->typePtr = &tclBooleanType;
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetBooleanFromObj --
*
* Attempt to return a boolean from the Tcl object "objPtr". If the
* object is not already a boolean, an attempt will be made to convert
* it to one.
*
* Results:
* The return value is a standard Tcl object result. If an error occurs
* during conversion, an error message is left in the interpreter's
* result unless "interp" is NULL.
*
* Side effects:
* If the object is not already a boolean, the conversion will free
* any old internal representation.
*
*----------------------------------------------------------------------
*/
int
Tcl_GetBooleanFromObj(interp, objPtr, boolPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
register Tcl_Obj *objPtr; /* The object from which to get boolean. */
register int *boolPtr; /* Place to store resulting boolean. */
{
register int result;
result = SetBooleanFromAny(interp, objPtr);
if (result == TCL_OK) {
*boolPtr = (int) objPtr->internalRep.longValue;
}
return result;
}
/*
*----------------------------------------------------------------------
*
* SetBooleanFromAny --
*
* Attempt to generate a boolean internal form for the Tcl object
* "objPtr".
*
* Results:
* The return value is a standard Tcl result. If an error occurs during
* conversion, an error message is left in the interpreter's result
* unless "interp" is NULL.
*
* Side effects:
* If no error occurs, an integer 1 or 0 is stored as "objPtr"s
* internal representation and the type of "objPtr" is set to boolean.
*
*----------------------------------------------------------------------
*/
static int
SetBooleanFromAny(interp, objPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
register Tcl_Obj *objPtr; /* The object to convert. */
{
Tcl_ObjType *oldTypePtr = objPtr->typePtr;
char *string, *end;
register char c;
char lowerCase[10];
int newBool, length;
register int i;
double dbl;
/*
* Get the string representation. Make it up-to-date if necessary.
*/
string = Tcl_GetStringFromObj(objPtr, &length);
/*
* Copy the string converting its characters to lower case.
*/
for (i = 0; (i < 9) && (i < length); i++) {
c = string[i];
/*
* Weed out international characters so we can safely operate
* on single bytes.
*/
if (c & 0x80) {
goto badBoolean;
}
if (isupper(UCHAR(c))) { /* INTL: ISO only. */
c = (char) UCHAR(tolower(UCHAR(c))); /* INTL: ISO only. */
}
lowerCase[i] = c;
}
lowerCase[i] = 0;
/*
* Parse the string as a boolean. We use an implementation here that
* doesn't report errors in interp if interp is NULL.
*/
c = lowerCase[0];
if ((c == '0') && (lowerCase[1] == '\0')) {
newBool = 0;
} else if ((c == '1') && (lowerCase[1] == '\0')) {
newBool = 1;
} else if ((c == 'y') && (strncmp(lowerCase, "yes", (size_t) length) == 0)) {
newBool = 1;
} else if ((c == 'n') && (strncmp(lowerCase, "no", (size_t) length) == 0)) {
newBool = 0;
} else if ((c == 't') && (strncmp(lowerCase, "true", (size_t) length) == 0)) {
newBool = 1;
} else if ((c == 'f') && (strncmp(lowerCase, "false", (size_t) length) == 0)) {
newBool = 0;
} else if ((c == 'o') && (length >= 2)) {
if (strncmp(lowerCase, "on", (size_t) length) == 0) {
newBool = 1;
} else if (strncmp(lowerCase, "off", (size_t) length) == 0) {
newBool = 0;
} else {
goto badBoolean;
}
} else {
/*
* Still might be a string containing the characters representing an
* int or double that wasn't handled above. This would be a string
* like "27" or "1.0" that is non-zero and not "1". Such a string
* whould result in the boolean value true. We try converting to
* double. If that succeeds and the resulting double is non-zero, we
* have a "true". Note that numbers can't have embedded NULLs.
*/
dbl = strtod(string, &end);
if (end == string) {
goto badBoolean;
}
/*
* Make sure the string has no garbage after the end of the double.
*/
while ((end < (string+length))
&& isspace(UCHAR(*end))) { /* INTL: ISO only */
end++;
}
if (end != (string+length)) {
goto badBoolean;
}
newBool = (dbl != 0.0);
}
/*
* Free the old internalRep before setting the new one. We do this as
* late as possible to allow the conversion code, in particular
* Tcl_GetStringFromObj, to use that old internalRep.
*/
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) {
oldTypePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.longValue = newBool;
objPtr->typePtr = &tclBooleanType;
return TCL_OK;
badBoolean:
if (interp != NULL) {
/*
* Must copy string before resetting the result in case a caller
* is trying to convert the interpreter's result to a boolean.
*/
char buf[100];
sprintf(buf, "expected boolean value but got \"%.50s\"", string);
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp), buf, -1);
}
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* UpdateStringOfBoolean --
*
* Update the string representation for a boolean object.
* Note: This procedure does not free an existing old string rep
* so storage will be lost if this has not already been done.
*
* Results:
* None.
*
* Side effects:
* The object's string is set to a valid string that results from
* the boolean-to-string conversion.
*
*----------------------------------------------------------------------
*/
static void
UpdateStringOfBoolean(objPtr)
register Tcl_Obj *objPtr; /* Int object whose string rep to update. */
{
char *s = ckalloc((unsigned) 2);
s[0] = (char) (objPtr->internalRep.longValue? '1' : '0');
s[1] = '\0';
objPtr->bytes = s;
objPtr->length = 1;
}
/*
*----------------------------------------------------------------------
*
* Tcl_NewDoubleObj --
*
* This procedure is normally called when not debugging: i.e., when
* TCL_MEM_DEBUG is not defined. It creates a new double object and
* initializes it from the argument double value.
*
* When TCL_MEM_DEBUG is defined, this procedure just returns the
* result of calling the debugging version Tcl_DbNewDoubleObj.
*
* Results:
* The newly created object is returned. This object will have an
* invalid string representation. The returned object has ref count 0.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
#undef Tcl_NewDoubleObj
Tcl_Obj *
Tcl_NewDoubleObj(dblValue)
register double dblValue; /* Double used to initialize the object. */
{
return Tcl_DbNewDoubleObj(dblValue, "unknown", 0);
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_NewDoubleObj(dblValue)
register double dblValue; /* Double used to initialize the object. */
{
register Tcl_Obj *objPtr;
TclNewObj(objPtr);
objPtr->bytes = NULL;
objPtr->internalRep.doubleValue = dblValue;
objPtr->typePtr = &tclDoubleType;
return objPtr;
}
#endif /* if TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_DbNewDoubleObj --
*
* This procedure is normally called when debugging: i.e., when
* TCL_MEM_DEBUG is defined. It creates new double objects. It is the
* same as the Tcl_NewDoubleObj procedure above except that it calls
* Tcl_DbCkalloc directly with the file name and line number from its
* caller. This simplifies debugging since then the checkmem command
* will report the correct file name and line number when reporting
* objects that haven't been freed.
*
* When TCL_MEM_DEBUG is not defined, this procedure just returns the
* result of calling Tcl_NewDoubleObj.
*
* Results:
* The newly created object is returned. This object will have an
* invalid string representation. The returned object has ref count 0.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
Tcl_Obj *
Tcl_DbNewDoubleObj(dblValue, file, line)
register double dblValue; /* Double used to initialize the object. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
register Tcl_Obj *objPtr;
TclDbNewObj(objPtr, file, line);
objPtr->bytes = NULL;
objPtr->internalRep.doubleValue = dblValue;
objPtr->typePtr = &tclDoubleType;
return objPtr;
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_DbNewDoubleObj(dblValue, file, line)
register double dblValue; /* Double used to initialize the object. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
return Tcl_NewDoubleObj(dblValue);
}
#endif /* TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_SetDoubleObj --
*
* Modify an object to be a double object and to have the specified
* double value.
*
* Results:
* None.
*
* Side effects:
* The object's old string rep, if any, is freed. Also, any old
* internal rep is freed.
*
*----------------------------------------------------------------------
*/
void
Tcl_SetDoubleObj(objPtr, dblValue)
register Tcl_Obj *objPtr; /* Object whose internal rep to init. */
register double dblValue; /* Double used to set the object's value. */
{
register Tcl_ObjType *oldTypePtr = objPtr->typePtr;
if (Tcl_IsShared(objPtr)) {
panic("Tcl_SetDoubleObj called with shared object");
}
Tcl_InvalidateStringRep(objPtr);
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) {
oldTypePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.doubleValue = dblValue;
objPtr->typePtr = &tclDoubleType;
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetDoubleFromObj --
*
* Attempt to return a double from the Tcl object "objPtr". If the
* object is not already a double, an attempt will be made to convert
* it to one.
*
* Results:
* The return value is a standard Tcl object result. If an error occurs
* during conversion, an error message is left in the interpreter's
* result unless "interp" is NULL.
*
* Side effects:
* If the object is not already a double, the conversion will free
* any old internal representation.
*
*----------------------------------------------------------------------
*/
int
Tcl_GetDoubleFromObj(interp, objPtr, dblPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
register Tcl_Obj *objPtr; /* The object from which to get a double. */
register double *dblPtr; /* Place to store resulting double. */
{
register int result;
if (objPtr->typePtr == &tclDoubleType) {
*dblPtr = objPtr->internalRep.doubleValue;
return TCL_OK;
}
result = SetDoubleFromAny(interp, objPtr);
if (result == TCL_OK) {
*dblPtr = objPtr->internalRep.doubleValue;
}
return result;
}
/*
*----------------------------------------------------------------------
*
* SetDoubleFromAny --
*
* Attempt to generate an double-precision floating point internal form
* for the Tcl object "objPtr".
*
* Results:
* The return value is a standard Tcl object result. If an error occurs
* during conversion, an error message is left in the interpreter's
* result unless "interp" is NULL.
*
* Side effects:
* If no error occurs, a double is stored as "objPtr"s internal
* representation.
*
*----------------------------------------------------------------------
*/
static int
SetDoubleFromAny(interp, objPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
register Tcl_Obj *objPtr; /* The object to convert. */
{
Tcl_ObjType *oldTypePtr = objPtr->typePtr;
char *string, *end;
double newDouble;
int length;
/*
* Get the string representation. Make it up-to-date if necessary.
*/
string = Tcl_GetStringFromObj(objPtr, &length);
/*
* Now parse "objPtr"s string as an double. Numbers can't have embedded
* NULLs. We use an implementation here that doesn't report errors in
* interp if interp is NULL.
*/
errno = 0;
newDouble = strtod(string, &end);
if (end == string) {
badDouble:
if (interp != NULL) {
/*
* Must copy string before resetting the result in case a caller
* is trying to convert the interpreter's result to an int.
*/
char buf[100];
sprintf(buf, "expected floating-point number but got \"%.50s\"",
string);
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp), buf, -1);
}
return TCL_ERROR;
}
if (errno != 0) {
if (interp != NULL) {
TclExprFloatError(interp, newDouble);
}
return TCL_ERROR;
}
/*
* Make sure that the string has no garbage after the end of the double.
*/
while ((end < (string+length))
&& isspace(UCHAR(*end))) { /* INTL: ISO space. */
end++;
}
if (end != (string+length)) {
goto badDouble;
}
/*
* The conversion to double succeeded. Free the old internalRep before
* setting the new one. We do this as late as possible to allow the
* conversion code, in particular Tcl_GetStringFromObj, to use that old
* internalRep.
*/
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) {
oldTypePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.doubleValue = newDouble;
objPtr->typePtr = &tclDoubleType;
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* UpdateStringOfDouble --
*
* Update the string representation for a double-precision floating
* point object. This must obey the current tcl_precision value for
* double-to-string conversions. Note: This procedure does not free an
* existing old string rep so storage will be lost if this has not
* already been done.
*
* Results:
* None.
*
* Side effects:
* The object's string is set to a valid string that results from
* the double-to-string conversion.
*
*----------------------------------------------------------------------
*/
static void
UpdateStringOfDouble(objPtr)
register Tcl_Obj *objPtr; /* Double obj with string rep to update. */
{
char buffer[TCL_DOUBLE_SPACE];
register int len;
Tcl_PrintDouble((Tcl_Interp *) NULL, objPtr->internalRep.doubleValue,
buffer);
len = strlen(buffer);
objPtr->bytes = (char *) ckalloc((unsigned) len + 1);
strcpy(objPtr->bytes, buffer);
objPtr->length = len;
}
/*
*----------------------------------------------------------------------
*
* Tcl_NewIntObj --
*
* If a client is compiled with TCL_MEM_DEBUG defined, calls to
* Tcl_NewIntObj to create a new integer object end up calling the
* debugging procedure Tcl_DbNewLongObj instead.
*
* Otherwise, if the client is compiled without TCL_MEM_DEBUG defined,
* calls to Tcl_NewIntObj result in a call to one of the two
* Tcl_NewIntObj implementations below. We provide two implementations
* so that the Tcl core can be compiled to do memory debugging of the
* core even if a client does not request it for itself.
*
* Integer and long integer objects share the same "integer" type
* implementation. We store all integers as longs and Tcl_GetIntFromObj
* checks whether the current value of the long can be represented by
* an int.
*
* Results:
* The newly created object is returned. This object will have an
* invalid string representation. The returned object has ref count 0.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
#undef Tcl_NewIntObj
Tcl_Obj *
Tcl_NewIntObj(intValue)
register int intValue; /* Int used to initialize the new object. */
{
return Tcl_DbNewLongObj((long)intValue, "unknown", 0);
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_NewIntObj(intValue)
register int intValue; /* Int used to initialize the new object. */
{
register Tcl_Obj *objPtr;
TclNewObj(objPtr);
objPtr->bytes = NULL;
objPtr->internalRep.longValue = (long)intValue;
objPtr->typePtr = &tclIntType;
return objPtr;
}
#endif /* if TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_SetIntObj --
*
* Modify an object to be an integer and to have the specified integer
* value.
*
* Results:
* None.
*
* Side effects:
* The object's old string rep, if any, is freed. Also, any old
* internal rep is freed.
*
*----------------------------------------------------------------------
*/
void
Tcl_SetIntObj(objPtr, intValue)
register Tcl_Obj *objPtr; /* Object whose internal rep to init. */
register int intValue; /* Integer used to set object's value. */
{
register Tcl_ObjType *oldTypePtr = objPtr->typePtr;
if (Tcl_IsShared(objPtr)) {
panic("Tcl_SetIntObj called with shared object");
}
Tcl_InvalidateStringRep(objPtr);
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) {
oldTypePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.longValue = (long) intValue;
objPtr->typePtr = &tclIntType;
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetIntFromObj --
*
* Attempt to return an int from the Tcl object "objPtr". If the object
* is not already an int, an attempt will be made to convert it to one.
*
* Integer and long integer objects share the same "integer" type
* implementation. We store all integers as longs and Tcl_GetIntFromObj
* checks whether the current value of the long can be represented by
* an int.
*
* Results:
* The return value is a standard Tcl object result. If an error occurs
* during conversion or if the long integer held by the object
* can not be represented by an int, an error message is left in
* the interpreter's result unless "interp" is NULL.
*
* Side effects:
* If the object is not already an int, the conversion will free
* any old internal representation.
*
*----------------------------------------------------------------------
*/
int
Tcl_GetIntFromObj(interp, objPtr, intPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
register Tcl_Obj *objPtr; /* The object from which to get a int. */
register int *intPtr; /* Place to store resulting int. */
{
register long l;
int result;
if (objPtr->typePtr != &tclIntType) {
result = SetIntFromAny(interp, objPtr);
if (result != TCL_OK) {
return result;
}
}
l = objPtr->internalRep.longValue;
if (((long)((int)l)) == l) {
*intPtr = (int)objPtr->internalRep.longValue;
return TCL_OK;
}
if (interp != NULL) {
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp),
"integer value too large to represent as non-long integer", -1);
}
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* SetIntFromAny --
*
* Attempt to generate an integer internal form for the Tcl object
* "objPtr".
*
* Results:
* The return value is a standard object Tcl result. If an error occurs
* during conversion, an error message is left in the interpreter's
* result unless "interp" is NULL.
*
* Side effects:
* If no error occurs, an int is stored as "objPtr"s internal
* representation.
*
*----------------------------------------------------------------------
*/
static int
SetIntFromAny(interp, objPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
register Tcl_Obj *objPtr; /* The object to convert. */
{
Tcl_ObjType *oldTypePtr = objPtr->typePtr;
char *string, *end;
int length;
register char *p;
long newLong;
/*
* Get the string representation. Make it up-to-date if necessary.
*/
string = Tcl_GetStringFromObj(objPtr, &length);
/*
* Now parse "objPtr"s string as an int. We use an implementation here
* that doesn't report errors in interp if interp is NULL. Note: use
* strtoul instead of strtol for integer conversions to allow full-size
* unsigned numbers, but don't depend on strtoul to handle sign
* characters; it won't in some implementations.
*/
errno = 0;
for (p = string; isspace(UCHAR(*p)); p++) { /* INTL: ISO space. */
/* Empty loop body. */
}
if (*p == '-') {
p++;
newLong = -((long)strtoul(p, &end, 0));
} else if (*p == '+') {
p++;
newLong = strtoul(p, &end, 0);
} else {
newLong = strtoul(p, &end, 0);
}
if (end == p) {
badInteger:
if (interp != NULL) {
/*
* Must copy string before resetting the result in case a caller
* is trying to convert the interpreter's result to an int.
*/
char buf[100];
sprintf(buf, "expected integer but got \"%.50s\"", string);
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp), buf, -1);
}
return TCL_ERROR;
}
if (errno == ERANGE) {
if (interp != NULL) {
char *s = "integer value too large to represent";
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp), s, -1);
Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", s, (char *) NULL);
}
return TCL_ERROR;
}
/*
* Make sure that the string has no garbage after the end of the int.
*/
while ((end < (string+length))
&& isspace(UCHAR(*end))) { /* INTL: ISO space. */
end++;
}
if (end != (string+length)) {
goto badInteger;
}
/*
* The conversion to int succeeded. Free the old internalRep before
* setting the new one. We do this as late as possible to allow the
* conversion code, in particular Tcl_GetStringFromObj, to use that old
* internalRep.
*/
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) {
oldTypePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.longValue = newLong;
objPtr->typePtr = &tclIntType;
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* UpdateStringOfInt --
*
* Update the string representation for an integer object.
* Note: This procedure does not free an existing old string rep
* so storage will be lost if this has not already been done.
*
* Results:
* None.
*
* Side effects:
* The object's string is set to a valid string that results from
* the int-to-string conversion.
*
*----------------------------------------------------------------------
*/
static void
UpdateStringOfInt(objPtr)
register Tcl_Obj *objPtr; /* Int object whose string rep to update. */
{
char buffer[TCL_INTEGER_SPACE];
register int len;
len = TclFormatInt(buffer, objPtr->internalRep.longValue);
objPtr->bytes = ckalloc((unsigned) len + 1);
strcpy(objPtr->bytes, buffer);
objPtr->length = len;
}
/*
*----------------------------------------------------------------------
*
* Tcl_NewLongObj --
*
* If a client is compiled with TCL_MEM_DEBUG defined, calls to
* Tcl_NewLongObj to create a new long integer object end up calling
* the debugging procedure Tcl_DbNewLongObj instead.
*
* Otherwise, if the client is compiled without TCL_MEM_DEBUG defined,
* calls to Tcl_NewLongObj result in a call to one of the two
* Tcl_NewLongObj implementations below. We provide two implementations
* so that the Tcl core can be compiled to do memory debugging of the
* core even if a client does not request it for itself.
*
* Integer and long integer objects share the same "integer" type
* implementation. We store all integers as longs and Tcl_GetIntFromObj
* checks whether the current value of the long can be represented by
* an int.
*
* Results:
* The newly created object is returned. This object will have an
* invalid string representation. The returned object has ref count 0.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
#undef Tcl_NewLongObj
Tcl_Obj *
Tcl_NewLongObj(longValue)
register long longValue; /* Long integer used to initialize the
* new object. */
{
return Tcl_DbNewLongObj(longValue, "unknown", 0);
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_NewLongObj(longValue)
register long longValue; /* Long integer used to initialize the
* new object. */
{
register Tcl_Obj *objPtr;
TclNewObj(objPtr);
objPtr->bytes = NULL;
objPtr->internalRep.longValue = longValue;
objPtr->typePtr = &tclIntType;
return objPtr;
}
#endif /* if TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_DbNewLongObj --
*
* If a client is compiled with TCL_MEM_DEBUG defined, calls to
* Tcl_NewIntObj and Tcl_NewLongObj to create new integer or
* long integer objects end up calling the debugging procedure
* Tcl_DbNewLongObj instead. We provide two implementations of
* Tcl_DbNewLongObj so that whether the Tcl core is compiled to do
* memory debugging of the core is independent of whether a client
* requests debugging for itself.
*
* When the core is compiled with TCL_MEM_DEBUG defined,
* Tcl_DbNewLongObj calls Tcl_DbCkalloc directly with the file name and
* line number from its caller. This simplifies debugging since then
* the checkmem command will report the caller's file name and line
* number when reporting objects that haven't been freed.
*
* Otherwise, when the core is compiled without TCL_MEM_DEBUG defined,
* this procedure just returns the result of calling Tcl_NewLongObj.
*
* Results:
* The newly created long integer object is returned. This object
* will have an invalid string representation. The returned object has
* ref count 0.
*
* Side effects:
* Allocates memory.
*
*----------------------------------------------------------------------
*/
#ifdef TCL_MEM_DEBUG
Tcl_Obj *
Tcl_DbNewLongObj(longValue, file, line)
register long longValue; /* Long integer used to initialize the
* new object. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
register Tcl_Obj *objPtr;
TclDbNewObj(objPtr, file, line);
objPtr->bytes = NULL;
objPtr->internalRep.longValue = longValue;
objPtr->typePtr = &tclIntType;
return objPtr;
}
#else /* if not TCL_MEM_DEBUG */
Tcl_Obj *
Tcl_DbNewLongObj(longValue, file, line)
register long longValue; /* Long integer used to initialize the
* new object. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
return Tcl_NewLongObj(longValue);
}
#endif /* TCL_MEM_DEBUG */
/*
*----------------------------------------------------------------------
*
* Tcl_SetLongObj --
*
* Modify an object to be an integer object and to have the specified
* long integer value.
*
* Results:
* None.
*
* Side effects:
* The object's old string rep, if any, is freed. Also, any old
* internal rep is freed.
*
*----------------------------------------------------------------------
*/
void
Tcl_SetLongObj(objPtr, longValue)
register Tcl_Obj *objPtr; /* Object whose internal rep to init. */
register long longValue; /* Long integer used to initialize the
* object's value. */
{
register Tcl_ObjType *oldTypePtr = objPtr->typePtr;
if (Tcl_IsShared(objPtr)) {
panic("Tcl_SetLongObj called with shared object");
}
Tcl_InvalidateStringRep(objPtr);
if ((oldTypePtr != NULL) && (oldTypePtr->freeIntRepProc != NULL)) {
oldTypePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.longValue = longValue;
objPtr->typePtr = &tclIntType;
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetLongFromObj --
*
* Attempt to return an long integer from the Tcl object "objPtr". If
* the object is not already an int object, an attempt will be made to
* convert it to one.
*
* Results:
* The return value is a standard Tcl object result. If an error occurs
* during conversion, an error message is left in the interpreter's
* result unless "interp" is NULL.
*
* Side effects:
* If the object is not already an int object, the conversion will free
* any old internal representation.
*
*----------------------------------------------------------------------
*/
int
Tcl_GetLongFromObj(interp, objPtr, longPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
register Tcl_Obj *objPtr; /* The object from which to get a long. */
register long *longPtr; /* Place to store resulting long. */
{
register int result;
if (objPtr->typePtr == &tclIntType) {
*longPtr = objPtr->internalRep.longValue;
return TCL_OK;
}
result = SetIntFromAny(interp, objPtr);
if (result == TCL_OK) {
*longPtr = objPtr->internalRep.longValue;
}
return result;
}
/*
*----------------------------------------------------------------------
*
* Tcl_DbIncrRefCount --
*
* This procedure is normally called when debugging: i.e., when
* TCL_MEM_DEBUG is defined. This checks to see whether or not
* the memory has been freed before incrementing the ref count.
*
* When TCL_MEM_DEBUG is not defined, this procedure just increments
* the reference count of the object.
*
* Results:
* None.
*
* Side effects:
* The object's ref count is incremented.
*
*----------------------------------------------------------------------
*/
void
Tcl_DbIncrRefCount(objPtr, file, line)
register Tcl_Obj *objPtr; /* The object we are registering a
* reference to. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
#ifdef TCL_MEM_DEBUG
if (objPtr->refCount == 0x61616161) {
fprintf(stderr, "file = %s, line = %d\n", file, line);
fflush(stderr);
panic("Trying to increment refCount of previously disposed object.");
}
#endif
++(objPtr)->refCount;
}
/*
*----------------------------------------------------------------------
*
* Tcl_DbDecrRefCount --
*
* This procedure is normally called when debugging: i.e., when
* TCL_MEM_DEBUG is defined. This checks to see whether or not
* the memory has been freed before decrementing the ref count.
*
* When TCL_MEM_DEBUG is not defined, this procedure just decrements
* the reference count of the object.
*
* Results:
* None.
*
* Side effects:
* The object's ref count is incremented.
*
*----------------------------------------------------------------------
*/
void
Tcl_DbDecrRefCount(objPtr, file, line)
register Tcl_Obj *objPtr; /* The object we are releasing a reference
* to. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
#ifdef TCL_MEM_DEBUG
if (objPtr->refCount == 0x61616161) {
fprintf(stderr, "file = %s, line = %d\n", file, line);
fflush(stderr);
panic("Trying to decrement refCount of previously disposed object.");
}
#endif
if (--(objPtr)->refCount <= 0) {
TclFreeObj(objPtr);
}
}
/*
*----------------------------------------------------------------------
*
* Tcl_DbIsShared --
*
* This procedure is normally called when debugging: i.e., when
* TCL_MEM_DEBUG is defined. It tests whether the object has a ref
* count greater than one.
*
* When TCL_MEM_DEBUG is not defined, this procedure just tests
* if the object has a ref count greater than one.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
Tcl_DbIsShared(objPtr, file, line)
register Tcl_Obj *objPtr; /* The object to test for being shared. */
char *file; /* The name of the source file calling this
* procedure; used for debugging. */
int line; /* Line number in the source file; used
* for debugging. */
{
#ifdef TCL_MEM_DEBUG
if (objPtr->refCount == 0x61616161) {
fprintf(stderr, "file = %s, line = %d\n", file, line);
fflush(stderr);
panic("Trying to check whether previously disposed object is shared.");
}
#endif
return ((objPtr)->refCount > 1);
}
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