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archie/tcl7.3/tclCmdIL.c

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Intial commit
2024-05-27 16:13:40 +02:00
/*
* tclCmdIL.c --
*
* This file contains the top-level command routines for most of
* the Tcl built-in commands whose names begin with the letters
* I through L. It contains only commands in the generic core
* (i.e. those that don't depend much upon UNIX facilities).
*
* Copyright (c) 1987-1993 The Regents of the University of California.
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
#ifndef lint
static char rcsid[] = "$Header: /user6/ouster/tcl/RCS/tclCmdIL.c,v 1.103 93/10/28 16:19:29 ouster Exp $ SPRITE (Berkeley)";
#endif
#include "tclInt.h"
#include "patchlevel.h"
/*
* The variables below are used to implement the "lsort" command.
* Unfortunately, this use of static variables prevents "lsort"
* from being thread-safe, but there's no alternative given the
* current implementation of qsort. In a threaded environment
* these variables should be made thread-local if possible, or else
* "lsort" needs internal mutual exclusion.
*/
static Tcl_Interp *sortInterp; /* Interpreter for "lsort" command. */
static enum {ASCII, INTEGER, REAL, COMMAND} sortMode;
/* Mode for sorting: compare as strings,
* compare as numbers, or call
* user-defined command for
* comparison. */
static Tcl_DString sortCmd; /* Holds command if mode is COMMAND.
* pre-initialized to hold base of
* command. */
static int sortIncreasing; /* 0 means sort in decreasing order,
* 1 means increasing order. */
static int sortCode; /* Anything other than TCL_OK means a
* problem occurred while sorting; this
* executing a comparison command, so
* the sort was aborted. */
/*
* Forward declarations for procedures defined in this file:
*/
static int SortCompareProc _ANSI_ARGS_((CONST VOID *first,
CONST VOID *second));
/*
*----------------------------------------------------------------------
*
* Tcl_IfCmd --
*
* This procedure is invoked to process the "if" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_IfCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
int i, result, value;
i = 1;
while (1) {
/*
* At this point in the loop, argv and argc refer to an expression
* to test, either for the main expression or an expression
* following an "elseif". The arguments after the expression must
* be "then" (optional) and a script to execute if the expression is
* true.
*/
if (i >= argc) {
Tcl_AppendResult(interp, "wrong # args: no expression after \"",
argv[i-1], "\" argument", (char *) NULL);
return TCL_ERROR;
}
result = Tcl_ExprBoolean(interp, argv[i], &value);
if (result != TCL_OK) {
return result;
}
i++;
if ((i < argc) && (strcmp(argv[i], "then") == 0)) {
i++;
}
if (i >= argc) {
Tcl_AppendResult(interp, "wrong # args: no script following \"",
argv[i-1], "\" argument", (char *) NULL);
return TCL_ERROR;
}
if (value) {
return Tcl_Eval(interp, argv[i]);
}
/*
* The expression evaluated to false. Skip the command, then
* see if there is an "else" or "elseif" clause.
*/
i++;
if (i >= argc) {
return TCL_OK;
}
if ((argv[i][0] == 'e') && (strcmp(argv[i], "elseif") == 0)) {
i++;
continue;
}
break;
}
/*
* Couldn't find a "then" or "elseif" clause to execute. Check now
* for an "else" clause. We know that there's at least one more
* argument when we get here.
*/
if (strcmp(argv[i], "else") == 0) {
i++;
if (i >= argc) {
Tcl_AppendResult(interp,
"wrong # args: no script following \"else\" argument",
(char *) NULL);
return TCL_ERROR;
}
}
return Tcl_Eval(interp, argv[i]);
}
/*
*----------------------------------------------------------------------
*
* Tcl_IncrCmd --
*
* This procedure is invoked to process the "incr" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_IncrCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
int value;
char *oldString, *result;
char newString[30];
if ((argc != 2) && (argc != 3)) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" varName ?increment?\"", (char *) NULL);
return TCL_ERROR;
}
oldString = Tcl_GetVar(interp, argv[1], TCL_LEAVE_ERR_MSG);
if (oldString == NULL) {
return TCL_ERROR;
}
if (Tcl_GetInt(interp, oldString, &value) != TCL_OK) {
Tcl_AddErrorInfo(interp,
"\n (reading value of variable to increment)");
return TCL_ERROR;
}
if (argc == 2) {
value += 1;
} else {
int increment;
if (Tcl_GetInt(interp, argv[2], &increment) != TCL_OK) {
Tcl_AddErrorInfo(interp,
"\n (reading increment)");
return TCL_ERROR;
}
value += increment;
}
sprintf(newString, "%d", value);
result = Tcl_SetVar(interp, argv[1], newString, TCL_LEAVE_ERR_MSG);
if (result == NULL) {
return TCL_ERROR;
}
interp->result = result;
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_InfoCmd --
*
* This procedure is invoked to process the "info" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_InfoCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
register Interp *iPtr = (Interp *) interp;
int length;
char c;
Arg *argPtr;
Proc *procPtr;
Var *varPtr;
Command *cmdPtr;
Tcl_HashEntry *hPtr;
Tcl_HashSearch search;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" option ?arg arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'a') && (strncmp(argv[1], "args", length)) == 0) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " args procname\"", (char *) NULL);
return TCL_ERROR;
}
procPtr = TclFindProc(iPtr, argv[2]);
if (procPtr == NULL) {
infoNoSuchProc:
Tcl_AppendResult(interp, "\"", argv[2],
"\" isn't a procedure", (char *) NULL);
return TCL_ERROR;
}
for (argPtr = procPtr->argPtr; argPtr != NULL;
argPtr = argPtr->nextPtr) {
Tcl_AppendElement(interp, argPtr->name);
}
return TCL_OK;
} else if ((c == 'b') && (strncmp(argv[1], "body", length)) == 0) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" body procname\"", (char *) NULL);
return TCL_ERROR;
}
procPtr = TclFindProc(iPtr, argv[2]);
if (procPtr == NULL) {
goto infoNoSuchProc;
}
iPtr->result = procPtr->command;
return TCL_OK;
} else if ((c == 'c') && (strncmp(argv[1], "cmdcount", length) == 0)
&& (length >= 2)) {
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" cmdcount\"", (char *) NULL);
return TCL_ERROR;
}
sprintf(iPtr->result, "%d", iPtr->cmdCount);
return TCL_OK;
} else if ((c == 'c') && (strncmp(argv[1], "commands", length) == 0)
&& (length >= 4)) {
if (argc > 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" commands [pattern]\"", (char *) NULL);
return TCL_ERROR;
}
for (hPtr = Tcl_FirstHashEntry(&iPtr->commandTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
char *name = Tcl_GetHashKey(&iPtr->commandTable, hPtr);
if ((argc == 3) && !Tcl_StringMatch(name, argv[2])) {
continue;
}
Tcl_AppendElement(interp, name);
}
return TCL_OK;
} else if ((c == 'c') && (strncmp(argv[1], "complete", length) == 0)
&& (length >= 4)) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" complete command\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_CommandComplete(argv[2])) {
interp->result = "1";
} else {
interp->result = "0";
}
return TCL_OK;
} else if ((c == 'd') && (strncmp(argv[1], "default", length)) == 0) {
if (argc != 5) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " default procname arg varname\"",
(char *) NULL);
return TCL_ERROR;
}
procPtr = TclFindProc(iPtr, argv[2]);
if (procPtr == NULL) {
goto infoNoSuchProc;
}
for (argPtr = procPtr->argPtr; ; argPtr = argPtr->nextPtr) {
if (argPtr == NULL) {
Tcl_AppendResult(interp, "procedure \"", argv[2],
"\" doesn't have an argument \"", argv[3],
"\"", (char *) NULL);
return TCL_ERROR;
}
if (strcmp(argv[3], argPtr->name) == 0) {
if (argPtr->defValue != NULL) {
if (Tcl_SetVar((Tcl_Interp *) iPtr, argv[4],
argPtr->defValue, 0) == NULL) {
defStoreError:
Tcl_AppendResult(interp,
"couldn't store default value in variable \"",
argv[4], "\"", (char *) NULL);
return TCL_ERROR;
}
iPtr->result = "1";
} else {
if (Tcl_SetVar((Tcl_Interp *) iPtr, argv[4], "", 0)
== NULL) {
goto defStoreError;
}
iPtr->result = "0";
}
return TCL_OK;
}
}
} else if ((c == 'e') && (strncmp(argv[1], "exists", length) == 0)) {
char *p;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" exists varName\"", (char *) NULL);
return TCL_ERROR;
}
p = Tcl_GetVar((Tcl_Interp *) iPtr, argv[2], 0);
/*
* The code below handles the special case where the name is for
* an array: Tcl_GetVar will reject this since you can't read
* an array variable without an index.
*/
if (p == NULL) {
Tcl_HashEntry *hPtr;
Var *varPtr;
if (strchr(argv[2], '(') != NULL) {
noVar:
iPtr->result = "0";
return TCL_OK;
}
if (iPtr->varFramePtr == NULL) {
hPtr = Tcl_FindHashEntry(&iPtr->globalTable, argv[2]);
} else {
hPtr = Tcl_FindHashEntry(&iPtr->varFramePtr->varTable, argv[2]);
}
if (hPtr == NULL) {
goto noVar;
}
varPtr = (Var *) Tcl_GetHashValue(hPtr);
if (varPtr->flags & VAR_UPVAR) {
varPtr = varPtr->value.upvarPtr;
}
if (!(varPtr->flags & VAR_ARRAY)) {
goto noVar;
}
}
iPtr->result = "1";
return TCL_OK;
} else if ((c == 'g') && (strncmp(argv[1], "globals", length) == 0)) {
char *name;
if (argc > 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" globals [pattern]\"", (char *) NULL);
return TCL_ERROR;
}
for (hPtr = Tcl_FirstHashEntry(&iPtr->globalTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
varPtr = (Var *) Tcl_GetHashValue(hPtr);
if (varPtr->flags & VAR_UNDEFINED) {
continue;
}
name = Tcl_GetHashKey(&iPtr->globalTable, hPtr);
if ((argc == 3) && !Tcl_StringMatch(name, argv[2])) {
continue;
}
Tcl_AppendElement(interp, name);
}
return TCL_OK;
} else if ((c == 'l') && (strncmp(argv[1], "level", length) == 0)
&& (length >= 2)) {
if (argc == 2) {
if (iPtr->varFramePtr == NULL) {
iPtr->result = "0";
} else {
sprintf(iPtr->result, "%d", iPtr->varFramePtr->level);
}
return TCL_OK;
} else if (argc == 3) {
int level;
CallFrame *framePtr;
if (Tcl_GetInt(interp, argv[2], &level) != TCL_OK) {
return TCL_ERROR;
}
if (level <= 0) {
if (iPtr->varFramePtr == NULL) {
levelError:
Tcl_AppendResult(interp, "bad level \"", argv[2],
"\"", (char *) NULL);
return TCL_ERROR;
}
level += iPtr->varFramePtr->level;
}
for (framePtr = iPtr->varFramePtr; framePtr != NULL;
framePtr = framePtr->callerVarPtr) {
if (framePtr->level == level) {
break;
}
}
if (framePtr == NULL) {
goto levelError;
}
iPtr->result = Tcl_Merge(framePtr->argc, framePtr->argv);
iPtr->freeProc = (Tcl_FreeProc *) free;
return TCL_OK;
}
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" level [number]\"", (char *) NULL);
return TCL_ERROR;
} else if ((c == 'l') && (strncmp(argv[1], "library", length) == 0)
&& (length >= 2)) {
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" library\"", (char *) NULL);
return TCL_ERROR;
}
interp->result = getenv("TCL_LIBRARY");
if (interp->result == NULL) {
#ifdef TCL_LIBRARY
interp->result = TCL_LIBRARY;
#else
interp->result = "there is no Tcl library at this installation";
return TCL_ERROR;
#endif
}
return TCL_OK;
} else if ((c == 'l') && (strncmp(argv[1], "locals", length) == 0)
&& (length >= 2)) {
char *name;
if (argc > 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" locals [pattern]\"", (char *) NULL);
return TCL_ERROR;
}
if (iPtr->varFramePtr == NULL) {
return TCL_OK;
}
for (hPtr = Tcl_FirstHashEntry(&iPtr->varFramePtr->varTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
varPtr = (Var *) Tcl_GetHashValue(hPtr);
if (varPtr->flags & (VAR_UNDEFINED|VAR_UPVAR)) {
continue;
}
name = Tcl_GetHashKey(&iPtr->varFramePtr->varTable, hPtr);
if ((argc == 3) && !Tcl_StringMatch(name, argv[2])) {
continue;
}
Tcl_AppendElement(interp, name);
}
return TCL_OK;
} else if ((c == 'p') && (strncmp(argv[1], "patchlevel", length) == 0)
&& (length >= 2)) {
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" patchlevel\"", (char *) NULL);
return TCL_ERROR;
}
sprintf(interp->result, "%d", TCL_PATCH_LEVEL);
return TCL_OK;
} else if ((c == 'p') && (strncmp(argv[1], "procs", length) == 0)
&& (length >= 2)) {
if (argc > 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" procs [pattern]\"", (char *) NULL);
return TCL_ERROR;
}
for (hPtr = Tcl_FirstHashEntry(&iPtr->commandTable, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
char *name = Tcl_GetHashKey(&iPtr->commandTable, hPtr);
cmdPtr = (Command *) Tcl_GetHashValue(hPtr);
if (!TclIsProc(cmdPtr)) {
continue;
}
if ((argc == 3) && !Tcl_StringMatch(name, argv[2])) {
continue;
}
Tcl_AppendElement(interp, name);
}
return TCL_OK;
} else if ((c == 's') && (strncmp(argv[1], "script", length) == 0)) {
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " script\"", (char *) NULL);
return TCL_ERROR;
}
if (iPtr->scriptFile != NULL) {
/*
* Can't depend on iPtr->scriptFile to be non-volatile:
* if this command is returned as the result of the script,
* then iPtr->scriptFile will go away.
*/
Tcl_SetResult(interp, iPtr->scriptFile, TCL_VOLATILE);
}
return TCL_OK;
} else if ((c == 't') && (strncmp(argv[1], "tclversion", length) == 0)) {
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " tclversion\"", (char *) NULL);
return TCL_ERROR;
}
/*
* Note: TCL_VERSION below is expected to be set with a "-D"
* switch in the Makefile.
*/
strcpy(iPtr->result, TCL_VERSION);
return TCL_OK;
} else if ((c == 'v') && (strncmp(argv[1], "vars", length)) == 0) {
Tcl_HashTable *tablePtr;
char *name;
if (argc > 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " vars [pattern]\"", (char *) NULL);
return TCL_ERROR;
}
if (iPtr->varFramePtr == NULL) {
tablePtr = &iPtr->globalTable;
} else {
tablePtr = &iPtr->varFramePtr->varTable;
}
for (hPtr = Tcl_FirstHashEntry(tablePtr, &search);
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
varPtr = (Var *) Tcl_GetHashValue(hPtr);
if (varPtr->flags & VAR_UNDEFINED) {
continue;
}
name = Tcl_GetHashKey(tablePtr, hPtr);
if ((argc == 3) && !Tcl_StringMatch(name, argv[2])) {
continue;
}
Tcl_AppendElement(interp, name);
}
return TCL_OK;
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": should be args, body, cmdcount, commands, ",
"complete, default, ",
"exists, globals, level, library, locals, ",
"patchlevel, procs, script, tclversion, or vars",
(char *) NULL);
return TCL_ERROR;
}
}
/*
*----------------------------------------------------------------------
*
* Tcl_JoinCmd --
*
* This procedure is invoked to process the "join" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_JoinCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
char *joinString;
char **listArgv;
int listArgc, i;
if (argc == 2) {
joinString = " ";
} else if (argc == 3) {
joinString = argv[2];
} else {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" list ?joinString?\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_SplitList(interp, argv[1], &listArgc, &listArgv) != TCL_OK) {
return TCL_ERROR;
}
for (i = 0; i < listArgc; i++) {
if (i == 0) {
Tcl_AppendResult(interp, listArgv[0], (char *) NULL);
} else {
Tcl_AppendResult(interp, joinString, listArgv[i], (char *) NULL);
}
}
ckfree((char *) listArgv);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LindexCmd --
*
* This procedure is invoked to process the "lindex" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_LindexCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
char *p, *element;
int index, size, parenthesized, result;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" list index\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_GetInt(interp, argv[2], &index) != TCL_OK) {
return TCL_ERROR;
}
if (index < 0) {
return TCL_OK;
}
for (p = argv[1] ; index >= 0; index--) {
result = TclFindElement(interp, p, &element, &p, &size,
&parenthesized);
if (result != TCL_OK) {
return result;
}
}
if (size == 0) {
return TCL_OK;
}
if (size >= TCL_RESULT_SIZE) {
interp->result = (char *) ckalloc((unsigned) size+1);
interp->freeProc = (Tcl_FreeProc *) free;
}
if (parenthesized) {
memcpy((VOID *) interp->result, (VOID *) element, size);
interp->result[size] = 0;
} else {
TclCopyAndCollapse(size, element, interp->result);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LinsertCmd --
*
* This procedure is invoked to process the "linsert" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_LinsertCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
char *p, *element, savedChar;
int i, index, count, result, size;
if (argc < 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" list index element ?element ...?\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_GetInt(interp, argv[2], &index) != TCL_OK) {
return TCL_ERROR;
}
/*
* Skip over the first "index" elements of the list, then add
* all of those elements to the result.
*/
size = 0;
element = argv[1];
for (count = 0, p = argv[1]; (count < index) && (*p != 0); count++) {
result = TclFindElement(interp, p, &element, &p, &size, (int *) NULL);
if (result != TCL_OK) {
return result;
}
}
if (*p == 0) {
Tcl_AppendResult(interp, argv[1], (char *) NULL);
} else {
char *end;
end = element+size;
if (element != argv[1]) {
while ((*end != 0) && !isspace(UCHAR(*end))) {
end++;
}
}
savedChar = *end;
*end = 0;
Tcl_AppendResult(interp, argv[1], (char *) NULL);
*end = savedChar;
}
/*
* Add the new list elements.
*/
for (i = 3; i < argc; i++) {
Tcl_AppendElement(interp, argv[i]);
}
/*
* Append the remainder of the original list.
*/
if (*p != 0) {
Tcl_AppendResult(interp, " ", p, (char *) NULL);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_ListCmd --
*
* This procedure is invoked to process the "list" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_ListCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
if (argc >= 2) {
interp->result = Tcl_Merge(argc-1, argv+1);
interp->freeProc = (Tcl_FreeProc *) free;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LlengthCmd --
*
* This procedure is invoked to process the "llength" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_LlengthCmd(dummy, interp, argc, argv)
ClientData dummy; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
int count, result;
char *element, *p;
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" list\"", (char *) NULL);
return TCL_ERROR;
}
for (count = 0, p = argv[1]; *p != 0 ; count++) {
result = TclFindElement(interp, p, &element, &p, (int *) NULL,
(int *) NULL);
if (result != TCL_OK) {
return result;
}
if (*element == 0) {
break;
}
}
sprintf(interp->result, "%d", count);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LrangeCmd --
*
* This procedure is invoked to process the "lrange" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_LrangeCmd(notUsed, interp, argc, argv)
ClientData notUsed; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
int first, last, result;
char *begin, *end, c, *dummy;
int count;
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" list first last\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_GetInt(interp, argv[2], &first) != TCL_OK) {
return TCL_ERROR;
}
if (first < 0) {
first = 0;
}
if ((*argv[3] == 'e') && (strncmp(argv[3], "end", strlen(argv[3])) == 0)) {
last = 1000000;
} else {
if (Tcl_GetInt(interp, argv[3], &last) != TCL_OK) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp,
"expected integer or \"end\" but got \"",
argv[3], "\"", (char *) NULL);
return TCL_ERROR;
}
}
if (first > last) {
return TCL_OK;
}
/*
* Extract a range of fields.
*/
for (count = 0, begin = argv[1]; count < first; count++) {
result = TclFindElement(interp, begin, &dummy, &begin, (int *) NULL,
(int *) NULL);
if (result != TCL_OK) {
return result;
}
if (*begin == 0) {
break;
}
}
for (count = first, end = begin; (count <= last) && (*end != 0);
count++) {
result = TclFindElement(interp, end, &dummy, &end, (int *) NULL,
(int *) NULL);
if (result != TCL_OK) {
return result;
}
}
/*
* Chop off trailing spaces.
*/
while (isspace(UCHAR(end[-1]))) {
end--;
}
c = *end;
*end = 0;
Tcl_SetResult(interp, begin, TCL_VOLATILE);
*end = c;
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LreplaceCmd --
*
* This procedure is invoked to process the "lreplace" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_LreplaceCmd(notUsed, interp, argc, argv)
ClientData notUsed; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
char *p1, *p2, *element, savedChar, *dummy;
int i, first, last, count, result, size;
if (argc < 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" list first last ?element element ...?\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_GetInt(interp, argv[2], &first) != TCL_OK) {
return TCL_ERROR;
}
if (TclGetListIndex(interp, argv[3], &last) != TCL_OK) {
return TCL_ERROR;
}
if (first < 0) {
first = 0;
}
if (last < 0) {
last = 0;
}
if (first > last) {
Tcl_AppendResult(interp, "first index must not be greater than second",
(char *) NULL);
return TCL_ERROR;
}
/*
* Skip over the elements of the list before "first".
*/
size = 0;
element = argv[1];
for (count = 0, p1 = argv[1]; (count < first) && (*p1 != 0); count++) {
result = TclFindElement(interp, p1, &element, &p1, &size,
(int *) NULL);
if (result != TCL_OK) {
return result;
}
}
if (*p1 == 0) {
Tcl_AppendResult(interp, "list doesn't contain element ",
argv[2], (char *) NULL);
return TCL_ERROR;
}
/*
* Skip over the elements of the list up through "last".
*/
for (p2 = p1 ; (count <= last) && (*p2 != 0); count++) {
result = TclFindElement(interp, p2, &dummy, &p2, (int *) NULL,
(int *) NULL);
if (result != TCL_OK) {
return result;
}
}
/*
* Add the elements before "first" to the result. Be sure to
* include quote or brace characters that might terminate the
* last of these elements.
*/
p1 = element+size;
if (element != argv[1]) {
while ((*p1 != 0) && !isspace(UCHAR(*p1))) {
p1++;
}
}
savedChar = *p1;
*p1 = 0;
Tcl_AppendResult(interp, argv[1], (char *) NULL);
*p1 = savedChar;
/*
* Add the new list elements.
*/
for (i = 4; i < argc; i++) {
Tcl_AppendElement(interp, argv[i]);
}
/*
* Append the remainder of the original list.
*/
if (*p2 != 0) {
if (*interp->result == 0) {
Tcl_SetResult(interp, p2, TCL_VOLATILE);
} else {
Tcl_AppendResult(interp, " ", p2, (char *) NULL);
}
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LsearchCmd --
*
* This procedure is invoked to process the "lsearch" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_LsearchCmd(notUsed, interp, argc, argv)
ClientData notUsed; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
#define EXACT 0
#define GLOB 1
#define REGEXP 2
int listArgc;
char **listArgv;
int i, match, mode, index;
mode = GLOB;
if (argc == 4) {
if (strcmp(argv[1], "-exact") == 0) {
mode = EXACT;
} else if (strcmp(argv[1], "-glob") == 0) {
mode = GLOB;
} else if (strcmp(argv[1], "-regexp") == 0) {
mode = REGEXP;
} else {
Tcl_AppendResult(interp, "bad search mode \"", argv[1],
"\": must be -exact, -glob, or -regexp", (char *) NULL);
return TCL_ERROR;
}
} else if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" ?mode? list pattern\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_SplitList(interp, argv[argc-2], &listArgc, &listArgv) != TCL_OK) {
return TCL_ERROR;
}
index = -1;
for (i = 0; i < listArgc; i++) {
match = 0;
switch (mode) {
case EXACT:
match = (strcmp(listArgv[i], argv[argc-1]) == 0);
break;
case GLOB:
match = Tcl_StringMatch(listArgv[i], argv[argc-1]);
break;
case REGEXP:
match = Tcl_RegExpMatch(interp, listArgv[i], argv[argc-1]);
if (match < 0) {
ckfree((char *) listArgv);
return TCL_ERROR;
}
break;
}
if (match) {
index = i;
break;
}
}
sprintf(interp->result, "%d", index);
ckfree((char *) listArgv);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LsortCmd --
*
* This procedure is invoked to process the "lsort" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
int
Tcl_LsortCmd(notUsed, interp, argc, argv)
ClientData notUsed; /* Not used. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
int listArgc, i, c, length;
char **listArgv;
char *command = NULL; /* Initialization needed only to
* prevent compiler warning. */
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" ?-ascii? ?-integer? ?-real? ?-increasing? ?-decreasing?",
" ?-command string? list\"", (char *) NULL);
return TCL_ERROR;
}
/*
* Parse arguments to set up the mode for the sort.
*/
sortInterp = interp;
sortMode = ASCII;
sortIncreasing = 1;
sortCode = TCL_OK;
for (i = 1; i < argc-1; i++) {
length = strlen(argv[i]);
if (length < 2) {
badSwitch:
Tcl_AppendResult(interp, "bad switch \"", argv[i],
"\": must be -ascii, -integer, -real, -increasing",
" -decreasing, or -command", (char *) NULL);
return TCL_ERROR;
}
c = argv[i][1];
if ((c == 'a') && (strncmp(argv[i], "-ascii", length) == 0)) {
sortMode = ASCII;
} else if ((c == 'c') && (strncmp(argv[i], "-command", length) == 0)) {
if (i == argc-2) {
Tcl_AppendResult(interp, "\"-command\" must be",
" followed by comparison command", (char *) NULL);
return TCL_ERROR;
}
sortMode = COMMAND;
command = argv[i+1];
i++;
} else if ((c == 'd')
&& (strncmp(argv[i], "-decreasing", length) == 0)) {
sortIncreasing = 0;
} else if ((c == 'i') && (length >= 4)
&& (strncmp(argv[i], "-increasing", length) == 0)) {
sortIncreasing = 1;
} else if ((c == 'i') && (length >= 4)
&& (strncmp(argv[i], "-integer", length) == 0)) {
sortMode = INTEGER;
} else if ((c == 'r')
&& (strncmp(argv[i], "-real", length) == 0)) {
sortMode = REAL;
} else {
goto badSwitch;
}
}
if (sortMode == COMMAND) {
Tcl_DStringInit(&sortCmd);
Tcl_DStringAppend(&sortCmd, command, -1);
}
if (Tcl_SplitList(interp, argv[argc-1], &listArgc, &listArgv) != TCL_OK) {
return TCL_ERROR;
}
qsort((VOID *) listArgv, listArgc, sizeof (char *), SortCompareProc);
if (sortCode == TCL_OK) {
Tcl_ResetResult(interp);
interp->result = Tcl_Merge(listArgc, listArgv);
interp->freeProc = (Tcl_FreeProc *) free;
}
if (sortMode == COMMAND) {
Tcl_DStringFree(&sortCmd);
}
ckfree((char *) listArgv);
return sortCode;
}
/*
*----------------------------------------------------------------------
*
* SortCompareProc --
*
* This procedure is invoked by qsort to determine the proper
* ordering between two elements.
*
* Results:
* < 0 means first is "smaller" than "second", > 0 means "first"
* is larger than "second", and 0 means they should be treated
* as equal.
*
* Side effects:
* None, unless a user-defined comparison command does something
* weird.
*
*----------------------------------------------------------------------
*/
static int
SortCompareProc(first, second)
CONST VOID *first, *second; /* Elements to be compared. */
{
int order;
char *firstString = *((char **) first);
char *secondString = *((char **) second);
order = 0;
if (sortCode != TCL_OK) {
/*
* Once an error has occurred, skip any future comparisons
* so as to preserve the error message in sortInterp->result.
*/
return order;
}
if (sortMode == ASCII) {
order = strcmp(firstString, secondString);
} else if (sortMode == INTEGER) {
int a, b;
if ((Tcl_GetInt(sortInterp, firstString, &a) != TCL_OK)
|| (Tcl_GetInt(sortInterp, secondString, &b) != TCL_OK)) {
Tcl_AddErrorInfo(sortInterp,
"\n (converting list element from string to integer)");
sortCode = TCL_ERROR;
return order;
}
if (a > b) {
order = 1;
} else if (b > a) {
order = -1;
}
} else if (sortMode == REAL) {
double a, b;
if ((Tcl_GetDouble(sortInterp, firstString, &a) != TCL_OK)
|| (Tcl_GetDouble(sortInterp, secondString, &b) != TCL_OK)) {
Tcl_AddErrorInfo(sortInterp,
"\n (converting list element from string to real)");
sortCode = TCL_ERROR;
return order;
}
if (a > b) {
order = 1;
} else if (b > a) {
order = -1;
}
} else {
int oldLength;
char *end;
/*
* Generate and evaluate a command to determine which string comes
* first.
*/
oldLength = Tcl_DStringLength(&sortCmd);
Tcl_DStringAppendElement(&sortCmd, firstString);
Tcl_DStringAppendElement(&sortCmd, secondString);
sortCode = Tcl_Eval(sortInterp, Tcl_DStringValue(&sortCmd));
Tcl_DStringTrunc(&sortCmd, oldLength);
if (sortCode != TCL_OK) {
Tcl_AddErrorInfo(sortInterp,
"\n (user-defined comparison command)");
return order;
}
/*
* Parse the result of the command.
*/
order = strtol(sortInterp->result, &end, 0);
if ((end == sortInterp->result) || (*end != 0)) {
Tcl_ResetResult(sortInterp);
Tcl_AppendResult(sortInterp,
"comparison command returned non-numeric result",
(char *) NULL);
sortCode = TCL_ERROR;
return order;
}
}
if (!sortIncreasing) {
order = -order;
}
return order;
}
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