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/*
*
* t c l - o b j . c - Implementation of the (crazy) Tcl_obj functions
* in the Scheme interpreeter
*
* Copyright © 1997-1999 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
*
*
* Permission to use, copy, modify, distribute,and license this
* software and its documentation for any purpose is hereby granted,
* provided that existing copyright notices are retained in all
* copies and that this notice is included verbatim in any
* distributions. No written agreement, license, or royalty fee is
* required for any of the authorized uses.
* This software is provided ``AS IS'' without express or implied
* warranty.
*
* Author: Erick Gallesio [eg@unice.fr]
* Creation date: 8-Jul-1997 10:33
* Last file update: 3-Sep-1999 20:59 (eg)
*
*/
#include "stk.h"
#ifdef USE_TK
# include "tk-glue.h"
# include "module.h"
#else
# include "tcl-glue.h"
#endif
void Tcl_ResetObjResult(Interp *interp)
{
interp->objResultPtr = STk_create_tcl_object(NULL);
}
#ifdef USE_TK
/*
*----------------------------------------------------------------------
*
* Tcl_CreateObjCommand --
*
* Define a new object-based command in a command table.
*
*----------------------------------------------------------------------
*/
Tcl_Command
Tcl_CreateObjCommand(interp, cmdName, proc, clientData, deleteProc)
Tcl_Interp *interp; /* Token for command interpreter (returned
* by previous call to Tcl_CreateInterp). */
char *cmdName; /* Name of command. If it contains namespace
* qualifiers, the new command is put in the
* specified namespace; otherwise it is put
* in the global namespace. */
Tcl_ObjCmdProc *proc; /* Object-based procedure to associate with
* name. */
ClientData clientData; /* Arbitrary value to pass to object
* procedure. */
Tcl_CmdDeleteProc *deleteProc;
/* If not NULL, gives a procedure to call
* when this command is deleted. */
{
struct Tk_command *res;
res = (struct Tk_command *) Tcl_CreateCommand(interp,
cmdName,
(Tcl_CmdProc *) proc,
clientData,
deleteProc);
res->objproc = 1;
return (Tcl_Command) res;
}
#endif
/*****************************************************************************/
/* Lists */
Tcl_Obj *
Tcl_NewListObj(objc, objv)
int objc; /* Count of objects referenced by objv. */
Tcl_Obj *CONST objv[]; /* An array of pointers to Tcl objects. */
{
register SCM res;
int i;
res = NIL;
if (objc > 0) {
for (i = 0; i < objc; i++)
res = Cons((SCM) objv[i], res);
res = Reverse(res);
}
return STk_create_tcl_object(res);
}
int
Tcl_ListObjLength(interp, listPtr, intPtr)
Tcl_Interp *interp; /* Used to report errors if not NULL. */
register Tcl_Obj *listPtr; /* List object whose #elements to return. */
register int *intPtr; /* The resulting int is stored here. */
{
SCM data = TCLOBJDATA((SCM) listPtr);
if (!data)
TCLOBJDATA((SCM) listPtr) = NIL;
else
if (NCONSP(data) && NNULLP(data))
TCLOBJDATA((SCM) listPtr) = LIST1(data);
*intPtr = STk_llength(data);
return TCL_OK;
}
int
Tcl_ListObjAppendElement(interp, listPtr, objPtr)
Tcl_Interp *interp; /* Used to report errors if not NULL. */
Tcl_Obj *listPtr; /* List object to append objPtr to. */
Tcl_Obj *objPtr; /* Object to append to listPtr's list. */
{
SCM data;
SCM list = (SCM) listPtr;
SCM obj = (SCM) objPtr;
data = TCLOBJDATA(list);
if (!data || NULLP(data))
data = LIST1(obj);
else
if (CONSP(data))
data = STk_append2(data, LIST1(obj));
else
data = Cons(data, LIST1(obj));
TCLOBJDATA(list) = data;
return TCL_OK;
}
int
Tcl_ListObjReplace(interp, listPtr, first, count, objc, objv)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
Tcl_Obj *listPtr; /* List object whose elements to replace. */
int first; /* Index of first element to replace. */
int count; /* Number of elements to replace. */
int objc; /* Number of objects to insert. */
Tcl_Obj *CONST objv[]; /* An array of objc pointers to Tcl objects
* to insert. */
{
SCM data = TCLOBJDATA((SCM) listPtr);
int len;
Tcl_Obj *objs;
if (!data)
data = NIL;
else
if (NCONSP(data) && NNULLP(data))
data = LIST1(data);
len = STk_llength(data);
objs = Tcl_NewListObj(objc, objv);
if (first < 0) first = 0;
if (first >= len) {
data = STk_append2(data, TCLOBJDATA((SCM) objs));
/* Tcl_DecrRefCount(objs); */
}
else {
panic("Problem in Tcl_ListObjReplace");
}
return 0; /* never reached */
}
int
Tcl_ListObjIndex(interp, listPtr, index, objPtrPtr)
Tcl_Interp *interp; /* Used to report errors if not NULL. */
register Tcl_Obj *listPtr; /* List object to index into. */
register int index; /* Index of element to return. */
Tcl_Obj **objPtrPtr; /* The resulting Tcl_Obj* is stored here. */
{
SCM data = TCLOBJDATA((SCM) listPtr);
int len;
if (!data)
data = NIL;
else
if (NCONSP(data) && NNULLP(data))
data = LIST1(data);
len = STk_llength(data);
if ((index < 0) || (index >= len)) {
/* FIXME: Est ce intelligent de retourner NULL? pourquoi pas NIL? */
*objPtrPtr = NULL;
} else {
*objPtrPtr = STk_create_tcl_object(STk_list_ref(data, STk_makeinteger(index)));
}
return TCL_OK;
}
/* This function uses a malloced array for returning the Tcl_Obj pointers
* This is not fully compatible with Tcl, but This function is used only
* for parsing the new font name scheme.
* Should be rewritten if used elsewhere (in particular with long lists)
*/
int
Tcl_ListObjGetElements(interp, listPtr, objcPtr, objvPtr)
Tcl_Interp *interp; /* Used to report errors if not NULL. */
register Tcl_Obj *listPtr; /* List object for which an element array
* is to be returned. */
int *objcPtr; /* Where to store the count of objects
* referenced by objv. */
Tcl_Obj ***objvPtr; /* Where to store the pointer to an array
* of pointers to the list's objects. */
{
static Tcl_Obj *obj[100];
int i, len;
SCM data = TCLOBJDATA((SCM) listPtr);
if (!data)
data = NIL;
else
if (STRINGP(data))
/* We have a string and we want to look at it as a list */
data = STk_convert_Tcl_string2list(CHARS(data));
else
if (NCONSP(data) && NNULLP(data))
data = LIST1(data);
len = STk_llength(data);
if (len > 100)
panic("Too much data in Tcl_ListObjGetElements\n");
for (i = 0; i < len; i++, data=CDR(data))
obj[i] = STk_create_tcl_object(CAR(data));
*objcPtr = len;
*objvPtr = obj;
return TCL_OK;
}
/*****************************************************************************/
/* Strings */
void Tcl_InitStringRep(Tcl_Obj *objPtr, char *bytePtr, int len)
{
TCLOBJDATA((SCM) objPtr) = STk_makestrg(len, bytePtr);
}
Tcl_Obj *
Tcl_NewStringObj(bytes, length)
register char *bytes; /* Points to the first of the length bytes
* used to initialize the new object. */
register int length; /* The number of bytes to copy from "bytes"
* when initializing the new object. If
* negative, use bytes up to the first
* NULL byte. */
{
if (length < 0) length = strlen(bytes);
return STk_create_tcl_object(STk_makestrg(length, bytes));
}
void
Tcl_AppendToObj(objPtr, bytes, length)
register Tcl_Obj *objPtr; /* Points to the object to append to. */
char *bytes; /* Points to the bytes to append to the
* object. */
register int length; /* The number of bytes to append from
* "bytes". If < 0, then append all bytes
* up to NULL byte. */
{
SCM str = TCLOBJDATA((SCM) objPtr);
char *s;
int len;
if (!str || NULLP(str))
str = STk_makestring("");
else
if (NSTRINGP(str))
Err("internal error (Tcl_AppendToObj only accepts strings). It was", str);
if (length < 0) length = strlen(bytes);
len = STRSIZE(str) + length;
s = STk_must_malloc((size_t) len + 1); /* +1 for the null */
sprintf(s, "%s%s", CHARS(str), bytes);
TCLOBJDATA((SCM) objPtr) = STk_makestrg(len, s);
free(s);
}
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. */
{
SCM s = TCLOBJDATA((SCM) objPtr);
if (!s)
s = STk_makestring("");
else
if (NSTRINGP(s)) {
SCM dumb;
char *string;
string = STk_convert_for_Tcl(s, &dumb);
s = STk_makestring(string);
}
if (lengthPtr) *lengthPtr = STRSIZE(s);
return CHARS(s);
}
void
Tcl_SetStringObj(objPtr, bytes, length)
register Tcl_Obj *objPtr; /* Object whose internal rep to init. */
char *bytes; /* Points to the first of the length bytes
* used to initialize the object. */
register int length; /* The number of bytes to copy from "bytes"
* when initializing the object. If
* negative, use bytes up to the first
* NULL byte.*/
{
if (length < 0) length = strlen(bytes);
TCLOBJDATA((SCM) objPtr) = STk_makestrg(length, bytes);
/* old string will be automatically garbaged */
}
void
Tcl_AppendStringsToObj TCL_VARARGS_DEF(Tcl_Obj *,arg1)
{
va_list argList;
register Tcl_Obj *objPtr;
int newLength, oldLength;
register char *string, *dst;
#ifdef STk_CODE
SCM data;
#endif
objPtr = (Tcl_Obj *) TCL_VARARGS_START(Tcl_Obj *,arg1,argList);
#ifdef STk_CODE
data = TCLOBJDATA((SCM) objPtr);
if (!data)
TCLOBJDATA((SCM) objPtr) = data = STk_makestring("");
else
if (NSTRINGP(data)) {
SCM newdata;
STk_convert_for_Tcl(data, &newdata);
TCLOBJDATA((SCM) objPtr) = data = newdata;
}
#else
if (objPtr->typePtr != &tclStringType) {
ConvertToStringType(objPtr);
}
#endif
/*
* Figure out how much space is needed for all the strings, and
* expand the string representation if it isn't big enough. If no
* bytes would be appended, just return.
*/
#ifdef STk_CODE
newLength = oldLength = STRSIZE(data);
#else
newLength = oldLength = objPtr->length;
#endif
while (1) {
string = va_arg(argList, char *);
if (string == NULL) {
break;
}
newLength += strlen(string);
}
if (newLength == oldLength) {
return;
}
#ifdef STk_CODE
CHARS(data) = (char *) STk_must_realloc(CHARS(data),(size_t)newLength+1);
#else
if ((long)newLength > objPtr->internalRep.longValue) {
/*
* There isn't currently enough space in the string
* representation so allocate additional space. If the current
* string representation isn't empty (i.e. it looks like we're
* doing a series of appends) then overallocate the space so
* that we won't have to do as much reallocation in the future.
*/
Tcl_SetObjLength(objPtr,
(objPtr->length == 0) ? newLength : 2*newLength);
}
#endif
/*
* Make a second pass through the arguments, appending all the
* strings to the object.
*/
TCL_VARARGS_START(Tcl_Obj *,arg1,argList);
#ifdef STk_CODE
dst = CHARS(data) + oldLength;
#else
dst = objPtr->bytes + oldLength;
#endif
while (1) {
string = va_arg(argList, char *);
if (string == NULL) {
break;
}
while (*string != 0) {
*dst = *string;
dst++;
string++;
}
}
/*
* Add a null byte to terminate the string. However, be careful:
* it's possible that the object is totally empty (if it was empty
* originally and there was nothing to append). In this case dst is
* NULL; just leave everything alone.
*/
if (dst != NULL) {
*dst = 0;
}
#ifdef STk_CODE
STRSIZE(data) = newLength;
#else
objPtr->length = newLength;
#endif
va_end(argList);
}
/*****************************************************************************/
/* Doubles */
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. */
{
TCLOBJDATA((SCM) objPtr) = STk_makenumber(dblValue);
}
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. */
{
SCM data = TCLOBJDATA((SCM) objPtr);
if (!data)
data = STk_makenumber((double) 0.0);
if (INTEGERP(data) || BIGNUMP(data))
data = STk_exact2inexact(data);
if (FLONUMP(data)) {
*dblPtr = FLONM(data);
return TCL_OK;
}
else {
if (interp != NULL) {
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp),
"expected floating-point number", -1);
}
return TCL_ERROR;
}
}
/*****************************************************************************/
/* Longs */
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. */
{
TCLOBJDATA((SCM) objPtr) = STk_makeinteger(longValue);
}
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. */
{
SCM data = TCLOBJDATA((SCM) objPtr);
if (!data)
*longPtr = 0L;
else
*longPtr = STk_integer_value_no_overflow(data);
if (*longPtr == LONG_MIN) {
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp),
"expected integer number", -1);
return TCL_ERROR;
}
else
return TCL_OK;
}
/*****************************************************************************/
/* Integers (as longs in STk) */
Tcl_Obj *
Tcl_NewIntObj(intValue)
register int intValue; /* Int used to initialize the new object. */
{
return STk_create_tcl_object(STk_makeinteger(intValue));
}
void
Tcl_SetIntObj(objPtr, intValue)
register Tcl_Obj *objPtr; /* Object whose internal rep to init. */
register int intValue; /* Int integer used to initialize the
* object's value. */
{
TCLOBJDATA((SCM) objPtr) = STk_makeinteger(intValue);
}
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. */
{
SCM data = TCLOBJDATA((SCM) objPtr);
if (!data)
*intPtr = 0;
else
*intPtr = STk_integer_value_no_overflow(data);
if (*intPtr == LONG_MIN) {
Tcl_ResetResult(interp);
Tcl_AppendToObj(Tcl_GetObjResult(interp),
"expected integer number", -1);
return TCL_ERROR;
}
else
return TCL_OK;
}
/*****************************************************************************/
/* Booleans */
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. */
{
TCLOBJDATA((SCM) objPtr) = boolValue? Truth: Ntruth;
}
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. */
{
SCM data = TCLOBJDATA((SCM) objPtr);
/* Accept various form of boolean "yes" 1 #t */
if (!data)
*boolPtr = 0;
else
if (STRINGP(data))
Tcl_GetBoolean(interp, CHARS(data), boolPtr);
else
if (INTEGERP(data))
*boolPtr = STk_integer_value_no_overflow(data) != 0;
else
*boolPtr = (data != Ntruth);
return TCL_OK;
}
Tcl_Obj *
Tcl_NewBooleanObj(boolValue)
register int boolValue; /* Boolean used to initialize new object. */
{
return STk_create_tcl_object(boolValue? Truth: Ntruth);
}
/*****************************************************************************/
/* Indexes */
int
Tcl_GetIndexFromObj(interp, objPtr, tablePtr, msg, flags, indexPtr)
Tcl_Interp *interp; /* Used for error reporting if not NULL. */
Tcl_Obj *objPtr; /* Object containing the string to lookup. */
char **tablePtr; /* Array of strings to compare against the
* value of objPtr; last entry must be NULL
* and there must not be duplicate entries. */
char *msg; /* Identifying word to use in error messages. */
int flags; /* 0 or TCL_EXACT */
int *indexPtr; /* Place to store resulting integer index. */
{
int index, length, i, numAbbrev;
char *key, *p1, *p2, **entryPtr;
Tcl_Obj *resultPtr;
#ifndef STk_CODE
/*
* See if there is a valid cached result from a previous lookup.
*/
if ((objPtr->typePtr == &tclIndexType)
&& (objPtr->internalRep.twoPtrValue.ptr1 == (VOID *) tablePtr)) {
*indexPtr = (int) objPtr->internalRep.twoPtrValue.ptr2;
return TCL_OK;
}
#endif
/*
* Lookup the value of the object in the table. Accept unique
* abbreviations unless TCL_EXACT is set in flags.
*/
key = Tcl_GetStringFromObj(objPtr, &length);
index = -1;
numAbbrev = 0;
for (entryPtr = tablePtr, i = 0; *entryPtr != NULL; entryPtr++, i++) {
for (p1 = key, p2 = *entryPtr; *p1 == *p2; p1++, p2++) {
if (*p1 == 0) {
index = i;
goto done;
}
}
if (*p1 == 0) {
/*
* The value is an abbreviation for this entry. Continue
* checking other entries to make sure it's unique. If we
* get more than one unique abbreviation, keep searching to
* see if there is an exact match, but remember the number
* of unique abbreviations and don't allow either.
*/
numAbbrev++;
index = i;
}
}
if ((flags & TCL_EXACT) || (numAbbrev != 1)) {
goto error;
}
done:
#ifndef STk_CODE
if ((objPtr->typePtr != NULL)
&& (objPtr->typePtr->freeIntRepProc != NULL)) {
objPtr->typePtr->freeIntRepProc(objPtr);
}
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) tablePtr;
objPtr->internalRep.twoPtrValue.ptr2 = (VOID *) index;
objPtr->typePtr = &tclIndexType;
#endif
*indexPtr = index;
return TCL_OK;
error:
if (interp != NULL) {
resultPtr = Tcl_GetObjResult(interp);
Tcl_AppendStringsToObj(resultPtr,
(numAbbrev > 1) ? "ambiguous " : "bad ", msg, " \"",
key, "\": must be ", *tablePtr, (char *) NULL);
for (entryPtr = tablePtr+1; *entryPtr != NULL; entryPtr++) {
if (entryPtr[1] == NULL) {
Tcl_AppendStringsToObj(resultPtr, ", or ", *entryPtr,
(char *) NULL);
} else {
Tcl_AppendStringsToObj(resultPtr, ", ", *entryPtr,
(char *) NULL);
}
}
}
return TCL_ERROR;
}
#ifdef USE_TK
/*****************************************************************************/
/* Eval */
/*
* Tcl_EvalObj --
*
* Execute Tcl commands stored in a Tcl object.
*/
int
Tcl_EvalObj(interp, objPtr)
Tcl_Interp *interp; /* Token for command interpreter
* (returned by a previous call to
* Tcl_CreateInterp). */
Tcl_Obj *objPtr; /* Pointer to object containing
* commands to execute. */
{
SCM cmd = TCLOBJDATA((SCM) objPtr);
int res;
PUSH_ERROR_HANDLER
{
SCM expr = STk_convert_tcl_list_to_scheme(cmd);
/* Do as if we had a catch around the expression */
STk_err_handler->context |= ERR_IGNORED;
STk_eval(expr, MOD_ENV(STk_Tk_module));
res = TCL_OK;
}
WHEN_ERROR
{
res = TCL_ERROR;
}
POP_ERROR_HANDLER;
return res;
}
#endif
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