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OpenFPGA/libs/EXTERNAL/tcl8.6.12/generic/tclCmdMZ.c

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adding Tcl interface to vpr
2022-06-07 11:15:20 -05:00
/*
* tclCmdMZ.c --
*
* This file contains the top-level command routines for most of the Tcl
* built-in commands whose names begin with the letters M to Z. 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.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
* Copyright (c) 1998-2000 Scriptics Corporation.
* Copyright (c) 2002 ActiveState Corporation.
* Copyright (c) 2003-2009 Donal K. Fellows.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tclInt.h"
#include "tclCompile.h"
#include "tclRegexp.h"
#include "tclStringTrim.h"
static inline Tcl_Obj * During(Tcl_Interp *interp, int resultCode,
Tcl_Obj *oldOptions, Tcl_Obj *errorInfo);
static Tcl_NRPostProc SwitchPostProc;
static Tcl_NRPostProc TryPostBody;
static Tcl_NRPostProc TryPostFinal;
static Tcl_NRPostProc TryPostHandler;
static int UniCharIsAscii(int character);
static int UniCharIsHexDigit(int character);
/*
* Default set of characters to trim in [string trim] and friends. This is a
* UTF-8 literal string containing all Unicode space characters [TIP #413]
*/
const char tclDefaultTrimSet[] =
"\x09\x0A\x0B\x0C\x0D " /* ASCII */
"\xC0\x80" /* nul (U+0000) */
"\xC2\x85" /* next line (U+0085) */
"\xC2\xA0" /* non-breaking space (U+00a0) */
"\xE1\x9A\x80" /* ogham space mark (U+1680) */
"\xE1\xA0\x8E" /* mongolian vowel separator (U+180e) */
"\xE2\x80\x80" /* en quad (U+2000) */
"\xE2\x80\x81" /* em quad (U+2001) */
"\xE2\x80\x82" /* en space (U+2002) */
"\xE2\x80\x83" /* em space (U+2003) */
"\xE2\x80\x84" /* three-per-em space (U+2004) */
"\xE2\x80\x85" /* four-per-em space (U+2005) */
"\xE2\x80\x86" /* six-per-em space (U+2006) */
"\xE2\x80\x87" /* figure space (U+2007) */
"\xE2\x80\x88" /* punctuation space (U+2008) */
"\xE2\x80\x89" /* thin space (U+2009) */
"\xE2\x80\x8A" /* hair space (U+200a) */
"\xE2\x80\x8B" /* zero width space (U+200b) */
"\xE2\x80\xA8" /* line separator (U+2028) */
"\xE2\x80\xA9" /* paragraph separator (U+2029) */
"\xE2\x80\xAF" /* narrow no-break space (U+202f) */
"\xE2\x81\x9F" /* medium mathematical space (U+205f) */
"\xE2\x81\xA0" /* word joiner (U+2060) */
"\xE3\x80\x80" /* ideographic space (U+3000) */
"\xEF\xBB\xBF" /* zero width no-break space (U+feff) */
;
/*
*----------------------------------------------------------------------
*
* Tcl_PwdObjCmd --
*
* This procedure is invoked to process the "pwd" Tcl command. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_PwdObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_Obj *retVal;
if (objc != 1) {
Tcl_WrongNumArgs(interp, 1, objv, NULL);
return TCL_ERROR;
}
retVal = Tcl_FSGetCwd(interp);
if (retVal == NULL) {
return TCL_ERROR;
}
Tcl_SetObjResult(interp, retVal);
Tcl_DecrRefCount(retVal);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_RegexpObjCmd --
*
* This procedure is invoked to process the "regexp" Tcl command. See
* the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_RegexpObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int i, indices, match, about, offset, all, doinline, numMatchesSaved;
int cflags, eflags, stringLength, matchLength;
Tcl_RegExp regExpr;
Tcl_Obj *objPtr, *startIndex = NULL, *resultPtr = NULL;
Tcl_RegExpInfo info;
static const char *const options[] = {
"-all", "-about", "-indices", "-inline",
"-expanded", "-line", "-linestop", "-lineanchor",
"-nocase", "-start", "--", NULL
};
enum options {
REGEXP_ALL, REGEXP_ABOUT, REGEXP_INDICES, REGEXP_INLINE,
REGEXP_EXPANDED,REGEXP_LINE, REGEXP_LINESTOP,REGEXP_LINEANCHOR,
REGEXP_NOCASE, REGEXP_START, REGEXP_LAST
};
indices = 0;
about = 0;
cflags = TCL_REG_ADVANCED;
offset = 0;
all = 0;
doinline = 0;
for (i = 1; i < objc; i++) {
const char *name;
int index;
name = TclGetString(objv[i]);
if (name[0] != '-') {
break;
}
if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", TCL_EXACT,
&index) != TCL_OK) {
goto optionError;
}
switch ((enum options) index) {
case REGEXP_ALL:
all = 1;
break;
case REGEXP_INDICES:
indices = 1;
break;
case REGEXP_INLINE:
doinline = 1;
break;
case REGEXP_NOCASE:
cflags |= TCL_REG_NOCASE;
break;
case REGEXP_ABOUT:
about = 1;
break;
case REGEXP_EXPANDED:
cflags |= TCL_REG_EXPANDED;
break;
case REGEXP_LINE:
cflags |= TCL_REG_NEWLINE;
break;
case REGEXP_LINESTOP:
cflags |= TCL_REG_NLSTOP;
break;
case REGEXP_LINEANCHOR:
cflags |= TCL_REG_NLANCH;
break;
case REGEXP_START: {
int temp;
if (++i >= objc) {
goto endOfForLoop;
}
if (TclGetIntForIndexM(interp, objv[i], 0, &temp) != TCL_OK) {
goto optionError;
}
if (startIndex) {
Tcl_DecrRefCount(startIndex);
}
startIndex = objv[i];
Tcl_IncrRefCount(startIndex);
break;
}
case REGEXP_LAST:
i++;
goto endOfForLoop;
}
}
endOfForLoop:
if ((objc - i) < (2 - about)) {
Tcl_WrongNumArgs(interp, 1, objv,
"?-option ...? exp string ?matchVar? ?subMatchVar ...?");
goto optionError;
}
objc -= i;
objv += i;
/*
* Check if the user requested -inline, but specified match variables; a
* no-no.
*/
if (doinline && ((objc - 2) != 0)) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"regexp match variables not allowed when using -inline", -1));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "REGEXP",
"MIX_VAR_INLINE", NULL);
goto optionError;
}
/*
* Handle the odd about case separately.
*/
if (about) {
regExpr = Tcl_GetRegExpFromObj(interp, objv[0], cflags);
if ((regExpr == NULL) || (TclRegAbout(interp, regExpr) < 0)) {
optionError:
if (startIndex) {
Tcl_DecrRefCount(startIndex);
}
return TCL_ERROR;
}
return TCL_OK;
}
/*
* Get the length of the string that we are matching against so we can do
* the termination test for -all matches. Do this before getting the
* regexp to avoid shimmering problems.
*/
objPtr = objv[1];
stringLength = Tcl_GetCharLength(objPtr);
if (startIndex) {
TclGetIntForIndexM(NULL, startIndex, stringLength, &offset);
Tcl_DecrRefCount(startIndex);
if (offset < 0) {
offset = 0;
}
}
regExpr = Tcl_GetRegExpFromObj(interp, objv[0], cflags);
if (regExpr == NULL) {
return TCL_ERROR;
}
objc -= 2;
objv += 2;
if (doinline) {
/*
* Save all the subexpressions, as we will return them as a list
*/
numMatchesSaved = -1;
} else {
/*
* Save only enough subexpressions for matches we want to keep, expect
* in the case of -all, where we need to keep at least one to know
* where to move the offset.
*/
numMatchesSaved = (objc == 0) ? all : objc;
}
/*
* The following loop is to handle multiple matches within the same source
* string; each iteration handles one match. If "-all" hasn't been
* specified then the loop body only gets executed once. We terminate the
* loop when the starting offset is past the end of the string.
*/
while (1) {
/*
* Pass either 0 or TCL_REG_NOTBOL in the eflags. Passing
* TCL_REG_NOTBOL indicates that the character at offset should not be
* considered the start of the line. If for example the pattern {^} is
* passed and -start is positive, then the pattern will not match the
* start of the string unless the previous character is a newline.
*/
if (offset == 0) {
eflags = 0;
} else if (offset > stringLength) {
eflags = TCL_REG_NOTBOL;
} else if (Tcl_GetUniChar(objPtr, offset-1) == '\n') {
eflags = 0;
} else {
eflags = TCL_REG_NOTBOL;
}
match = Tcl_RegExpExecObj(interp, regExpr, objPtr, offset,
numMatchesSaved, eflags);
if (match < 0) {
return TCL_ERROR;
}
if (match == 0) {
/*
* We want to set the value of the intepreter result only when
* this is the first time through the loop.
*/
if (all <= 1) {
/*
* If inlining, the interpreter's object result remains an
* empty list, otherwise set it to an integer object w/ value
* 0.
*/
if (!doinline) {
Tcl_SetObjResult(interp, Tcl_NewIntObj(0));
}
return TCL_OK;
}
break;
}
/*
* If additional variable names have been specified, return index
* information in those variables.
*/
Tcl_RegExpGetInfo(regExpr, &info);
if (doinline) {
/*
* It's the number of substitutions, plus one for the matchVar at
* index 0
*/
objc = info.nsubs + 1;
if (all <= 1) {
TclNewObj(resultPtr);
}
}
for (i = 0; i < objc; i++) {
Tcl_Obj *newPtr;
if (indices) {
int start, end;
Tcl_Obj *objs[2];
/*
* Only adjust the match area if there was a match for that
* area. (Scriptics Bug 4391/SF Bug #219232)
*/
if (i <= info.nsubs && info.matches[i].start >= 0) {
start = offset + info.matches[i].start;
end = offset + info.matches[i].end;
/*
* Adjust index so it refers to the last character in the
* match instead of the first character after the match.
*/
if (end >= offset) {
end--;
}
} else {
start = -1;
end = -1;
}
objs[0] = Tcl_NewLongObj(start);
objs[1] = Tcl_NewLongObj(end);
newPtr = Tcl_NewListObj(2, objs);
} else {
if (i <= info.nsubs) {
newPtr = Tcl_GetRange(objPtr,
offset + info.matches[i].start,
offset + info.matches[i].end - 1);
} else {
TclNewObj(newPtr);
}
}
if (doinline) {
if (Tcl_ListObjAppendElement(interp, resultPtr, newPtr)
!= TCL_OK) {
Tcl_DecrRefCount(newPtr);
Tcl_DecrRefCount(resultPtr);
return TCL_ERROR;
}
} else {
if (Tcl_ObjSetVar2(interp, objv[i], NULL, newPtr,
TCL_LEAVE_ERR_MSG) == NULL) {
return TCL_ERROR;
}
}
}
if (all == 0) {
break;
}
/*
* Adjust the offset to the character just after the last one in the
* matchVar and increment all to count how many times we are making a
* match. We always increment the offset by at least one to prevent
* endless looping (as in the case: regexp -all {a*} a). Otherwise,
* when we match the NULL string at the end of the input string, we
* will loop indefinately (because the length of the match is 0, so
* offset never changes).
*/
matchLength = (info.matches[0].end - info.matches[0].start);
offset += info.matches[0].end;
/*
* A match of length zero could happen for {^} {$} or {.*} and in
* these cases we always want to bump the index up one.
*/
if (matchLength == 0) {
offset++;
}
all++;
if (offset >= stringLength) {
break;
}
}
/*
* Set the interpreter's object result to an integer object with value 1
* if -all wasn't specified, otherwise it's all-1 (the number of times
* through the while - 1).
*/
if (doinline) {
Tcl_SetObjResult(interp, resultPtr);
} else {
Tcl_SetObjResult(interp, Tcl_NewIntObj(all ? all-1 : 1));
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_RegsubObjCmd --
*
* This procedure is invoked to process the "regsub" Tcl command. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_RegsubObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int idx, result, cflags, all, wlen, wsublen, numMatches, offset;
int start, end, subStart, subEnd, match;
Tcl_RegExp regExpr;
Tcl_RegExpInfo info;
Tcl_Obj *resultPtr, *subPtr, *objPtr, *startIndex = NULL;
Tcl_UniChar ch, *wsrc, *wfirstChar, *wstring, *wsubspec, *wend;
static const char *const options[] = {
"-all", "-nocase", "-expanded",
"-line", "-linestop", "-lineanchor", "-start",
"--", NULL
};
enum options {
REGSUB_ALL, REGSUB_NOCASE, REGSUB_EXPANDED,
REGSUB_LINE, REGSUB_LINESTOP, REGSUB_LINEANCHOR, REGSUB_START,
REGSUB_LAST
};
cflags = TCL_REG_ADVANCED;
all = 0;
offset = 0;
resultPtr = NULL;
for (idx = 1; idx < objc; idx++) {
const char *name;
int index;
name = TclGetString(objv[idx]);
if (name[0] != '-') {
break;
}
if (Tcl_GetIndexFromObj(interp, objv[idx], options, "option",
TCL_EXACT, &index) != TCL_OK) {
goto optionError;
}
switch ((enum options) index) {
case REGSUB_ALL:
all = 1;
break;
case REGSUB_NOCASE:
cflags |= TCL_REG_NOCASE;
break;
case REGSUB_EXPANDED:
cflags |= TCL_REG_EXPANDED;
break;
case REGSUB_LINE:
cflags |= TCL_REG_NEWLINE;
break;
case REGSUB_LINESTOP:
cflags |= TCL_REG_NLSTOP;
break;
case REGSUB_LINEANCHOR:
cflags |= TCL_REG_NLANCH;
break;
case REGSUB_START: {
int temp;
if (++idx >= objc) {
goto endOfForLoop;
}
if (TclGetIntForIndexM(interp, objv[idx], 0, &temp) != TCL_OK) {
goto optionError;
}
if (startIndex) {
Tcl_DecrRefCount(startIndex);
}
startIndex = objv[idx];
Tcl_IncrRefCount(startIndex);
break;
}
case REGSUB_LAST:
idx++;
goto endOfForLoop;
}
}
endOfForLoop:
if (objc-idx < 3 || objc-idx > 4) {
Tcl_WrongNumArgs(interp, 1, objv,
"?-option ...? exp string subSpec ?varName?");
optionError:
if (startIndex) {
Tcl_DecrRefCount(startIndex);
}
return TCL_ERROR;
}
objc -= idx;
objv += idx;
if (startIndex) {
int stringLength = Tcl_GetCharLength(objv[1]);
TclGetIntForIndexM(NULL, startIndex, stringLength, &offset);
Tcl_DecrRefCount(startIndex);
if (offset < 0) {
offset = 0;
}
}
if (all && (offset == 0)
&& (strpbrk(TclGetString(objv[2]), "&\\") == NULL)
&& (strpbrk(TclGetString(objv[0]), "*+?{}()[].\\|^$") == NULL)) {
/*
* This is a simple one pair string map situation. We make use of a
* slightly modified version of the one pair STR_MAP code.
*/
int slen, nocase;
int (*strCmpFn)(const Tcl_UniChar*,const Tcl_UniChar*,unsigned long);
Tcl_UniChar *p, wsrclc;
numMatches = 0;
nocase = (cflags & TCL_REG_NOCASE);
strCmpFn = nocase ? Tcl_UniCharNcasecmp : Tcl_UniCharNcmp;
wsrc = Tcl_GetUnicodeFromObj(objv[0], &slen);
wstring = Tcl_GetUnicodeFromObj(objv[1], &wlen);
wsubspec = Tcl_GetUnicodeFromObj(objv[2], &wsublen);
wend = wstring + wlen - (slen ? slen - 1 : 0);
result = TCL_OK;
if (slen == 0) {
/*
* regsub behavior for "" matches between each character. 'string
* map' skips the "" case.
*/
if (wstring < wend) {
resultPtr = Tcl_NewUnicodeObj(wstring, 0);
Tcl_IncrRefCount(resultPtr);
for (; wstring < wend; wstring++) {
Tcl_AppendUnicodeToObj(resultPtr, wsubspec, wsublen);
Tcl_AppendUnicodeToObj(resultPtr, wstring, 1);
numMatches++;
}
wlen = 0;
}
} else {
wsrclc = Tcl_UniCharToLower(*wsrc);
for (p = wfirstChar = wstring; wstring < wend; wstring++) {
if ((*wstring == *wsrc ||
(nocase && Tcl_UniCharToLower(*wstring)==wsrclc)) &&
(slen==1 || (strCmpFn(wstring, wsrc,
(unsigned long) slen) == 0))) {
if (numMatches == 0) {
resultPtr = Tcl_NewUnicodeObj(wstring, 0);
Tcl_IncrRefCount(resultPtr);
}
if (p != wstring) {
Tcl_AppendUnicodeToObj(resultPtr, p, wstring - p);
p = wstring + slen;
} else {
p += slen;
}
wstring = p - 1;
Tcl_AppendUnicodeToObj(resultPtr, wsubspec, wsublen);
numMatches++;
}
}
if (numMatches) {
wlen = wfirstChar + wlen - p;
wstring = p;
}
}
objPtr = NULL;
subPtr = NULL;
goto regsubDone;
}
regExpr = Tcl_GetRegExpFromObj(interp, objv[0], cflags);
if (regExpr == NULL) {
return TCL_ERROR;
}
/*
* Make sure to avoid problems where the objects are shared. This can
* cause RegExpObj <> UnicodeObj shimmering that causes data corruption.
* [Bug #461322]
*/
if (objv[1] == objv[0]) {
objPtr = Tcl_DuplicateObj(objv[1]);
} else {
objPtr = objv[1];
}
wstring = Tcl_GetUnicodeFromObj(objPtr, &wlen);
if (objv[2] == objv[0]) {
subPtr = Tcl_DuplicateObj(objv[2]);
} else {
subPtr = objv[2];
}
wsubspec = Tcl_GetUnicodeFromObj(subPtr, &wsublen);
result = TCL_OK;
/*
* The following loop is to handle multiple matches within the same source
* string; each iteration handles one match and its corresponding
* substitution. If "-all" hasn't been specified then the loop body only
* gets executed once. We must use 'offset <= wlen' in particular for the
* case where the regexp pattern can match the empty string - this is
* useful when doing, say, 'regsub -- ^ $str ...' when $str might be
* empty.
*/
numMatches = 0;
for ( ; offset <= wlen; ) {
/*
* The flags argument is set if string is part of a larger string, so
* that "^" won't match.
*/
match = Tcl_RegExpExecObj(interp, regExpr, objPtr, offset,
10 /* matches */, ((offset > 0 &&
(wstring[offset-1] != (Tcl_UniChar)'\n'))
? TCL_REG_NOTBOL : 0));
if (match < 0) {
result = TCL_ERROR;
goto done;
}
if (match == 0) {
break;
}
if (numMatches == 0) {
resultPtr = Tcl_NewUnicodeObj(wstring, 0);
Tcl_IncrRefCount(resultPtr);
if (offset > 0) {
/*
* Copy the initial portion of the string in if an offset was
* specified.
*/
Tcl_AppendUnicodeToObj(resultPtr, wstring, offset);
}
}
numMatches++;
/*
* Copy the portion of the source string before the match to the
* result variable.
*/
Tcl_RegExpGetInfo(regExpr, &info);
start = info.matches[0].start;
end = info.matches[0].end;
Tcl_AppendUnicodeToObj(resultPtr, wstring + offset, start);
/*
* Append the subSpec argument to the variable, making appropriate
* substitutions. This code is a bit hairy because of the backslash
* conventions and because the code saves up ranges of characters in
* subSpec to reduce the number of calls to Tcl_SetVar.
*/
wsrc = wfirstChar = wsubspec;
wend = wsubspec + wsublen;
for (ch = *wsrc; wsrc != wend; wsrc++, ch = *wsrc) {
if (ch == '&') {
idx = 0;
} else if (ch == '\\') {
ch = wsrc[1];
if ((ch >= '0') && (ch <= '9')) {
idx = ch - '0';
} else if ((ch == '\\') || (ch == '&')) {
*wsrc = ch;
Tcl_AppendUnicodeToObj(resultPtr, wfirstChar,
wsrc - wfirstChar + 1);
*wsrc = '\\';
wfirstChar = wsrc + 2;
wsrc++;
continue;
} else {
continue;
}
} else {
continue;
}
if (wfirstChar != wsrc) {
Tcl_AppendUnicodeToObj(resultPtr, wfirstChar,
wsrc - wfirstChar);
}
if (idx <= info.nsubs) {
subStart = info.matches[idx].start;
subEnd = info.matches[idx].end;
if ((subStart >= 0) && (subEnd >= 0)) {
Tcl_AppendUnicodeToObj(resultPtr,
wstring + offset + subStart, subEnd - subStart);
}
}
if (*wsrc == '\\') {
wsrc++;
}
wfirstChar = wsrc + 1;
}
if (wfirstChar != wsrc) {
Tcl_AppendUnicodeToObj(resultPtr, wfirstChar, wsrc - wfirstChar);
}
if (end == 0) {
/*
* Always consume at least one character of the input string in
* order to prevent infinite loops.
*/
if (offset < wlen) {
Tcl_AppendUnicodeToObj(resultPtr, wstring + offset, 1);
}
offset++;
} else {
offset += end;
if (start == end) {
/*
* We matched an empty string, which means we must go forward
* one more step so we don't match again at the same spot.
*/
if (offset < wlen) {
Tcl_AppendUnicodeToObj(resultPtr, wstring + offset, 1);
}
offset++;
}
}
if (!all) {
break;
}
}
/*
* Copy the portion of the source string after the last match to the
* result variable.
*/
regsubDone:
if (numMatches == 0) {
/*
* On zero matches, just ignore the offset, since it shouldn't matter
* to us in this case, and the user may have skewed it.
*/
resultPtr = objv[1];
Tcl_IncrRefCount(resultPtr);
} else if (offset < wlen) {
Tcl_AppendUnicodeToObj(resultPtr, wstring + offset, wlen - offset);
}
if (objc == 4) {
if (Tcl_ObjSetVar2(interp, objv[3], NULL, resultPtr,
TCL_LEAVE_ERR_MSG) == NULL) {
result = TCL_ERROR;
} else {
/*
* Set the interpreter's object result to an integer object
* holding the number of matches.
*/
Tcl_SetObjResult(interp, Tcl_NewIntObj(numMatches));
}
} else {
/*
* No varname supplied, so just return the modified string.
*/
Tcl_SetObjResult(interp, resultPtr);
}
done:
if (objPtr && (objv[1] == objv[0])) {
Tcl_DecrRefCount(objPtr);
}
if (subPtr && (objv[2] == objv[0])) {
Tcl_DecrRefCount(subPtr);
}
if (resultPtr) {
Tcl_DecrRefCount(resultPtr);
}
return result;
}
/*
*----------------------------------------------------------------------
*
* Tcl_RenameObjCmd --
*
* This procedure is invoked to process the "rename" Tcl command. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl object result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_RenameObjCmd(
ClientData dummy, /* Arbitrary value passed to the command. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
const char *oldName, *newName;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "oldName newName");
return TCL_ERROR;
}
oldName = TclGetString(objv[1]);
newName = TclGetString(objv[2]);
return TclRenameCommand(interp, oldName, newName);
}
/*
*----------------------------------------------------------------------
*
* Tcl_ReturnObjCmd --
*
* This object-based procedure is invoked to process the "return" Tcl
* command. See the user documentation for details on what it does.
*
* Results:
* A standard Tcl object result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_ReturnObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int code, level;
Tcl_Obj *returnOpts;
/*
* General syntax: [return ?-option value ...? ?result?]
* An even number of words means an explicit result argument is present.
*/
int explicitResult = (0 == (objc % 2));
int numOptionWords = objc - 1 - explicitResult;
if (TCL_ERROR == TclMergeReturnOptions(interp, numOptionWords, objv+1,
&returnOpts, &code, &level)) {
return TCL_ERROR;
}
code = TclProcessReturn(interp, code, level, returnOpts);
if (explicitResult) {
Tcl_SetObjResult(interp, objv[objc-1]);
}
return code;
}
/*
*----------------------------------------------------------------------
*
* Tcl_SourceObjCmd --
*
* This procedure is invoked to process the "source" Tcl command. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl object result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_SourceObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
return Tcl_NRCallObjProc(interp, TclNRSourceObjCmd, dummy, objc, objv);
}
int
TclNRSourceObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
const char *encodingName = NULL;
Tcl_Obj *fileName;
if (objc != 2 && objc !=4) {
Tcl_WrongNumArgs(interp, 1, objv, "?-encoding name? fileName");
return TCL_ERROR;
}
fileName = objv[objc-1];
if (objc == 4) {
static const char *const options[] = {
"-encoding", NULL
};
int index;
if (TCL_ERROR == Tcl_GetIndexFromObj(interp, objv[1], options,
"option", TCL_EXACT, &index)) {
return TCL_ERROR;
}
encodingName = TclGetString(objv[2]);
}
return TclNREvalFile(interp, fileName, encodingName);
}
/*
*----------------------------------------------------------------------
*
* Tcl_SplitObjCmd --
*
* This procedure is invoked to process the "split" Tcl command. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_SplitObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_UniChar ch = 0;
int len;
const char *splitChars;
const char *stringPtr;
const char *end;
int splitCharLen, stringLen;
Tcl_Obj *listPtr, *objPtr;
if (objc == 2) {
splitChars = " \n\t\r";
splitCharLen = 4;
} else if (objc == 3) {
splitChars = TclGetStringFromObj(objv[2], &splitCharLen);
} else {
Tcl_WrongNumArgs(interp, 1, objv, "string ?splitChars?");
return TCL_ERROR;
}
stringPtr = TclGetStringFromObj(objv[1], &stringLen);
end = stringPtr + stringLen;
TclNewObj(listPtr);
if (stringLen == 0) {
/*
* Do nothing.
*/
} else if (splitCharLen == 0) {
Tcl_HashTable charReuseTable;
Tcl_HashEntry *hPtr;
int isNew;
/*
* Handle the special case of splitting on every character.
*
* Uses a hash table to ensure that each kind of character has only
* one Tcl_Obj instance (multiply-referenced) in the final list. This
* is a *major* win when splitting on a long string (especially in the
* megabyte range!) - DKF
*/
Tcl_InitHashTable(&charReuseTable, TCL_ONE_WORD_KEYS);
for ( ; stringPtr < end; stringPtr += len) {
int ucs4;
len = TclUtfToUCS4(stringPtr, &ucs4);
hPtr = Tcl_CreateHashEntry(&charReuseTable, INT2PTR(ucs4), &isNew);
if (isNew) {
TclNewStringObj(objPtr, stringPtr, len);
/*
* Don't need to fiddle with refcount...
*/
Tcl_SetHashValue(hPtr, objPtr);
} else {
objPtr = Tcl_GetHashValue(hPtr);
}
Tcl_ListObjAppendElement(NULL, listPtr, objPtr);
}
Tcl_DeleteHashTable(&charReuseTable);
} else if (splitCharLen == 1) {
char *p;
/*
* Handle the special case of splitting on a single character. This is
* only true for the one-char ASCII case, as one unicode char is > 1
* byte in length.
*/
while (*stringPtr && (p=strchr(stringPtr,(int)*splitChars)) != NULL) {
objPtr = Tcl_NewStringObj(stringPtr, p - stringPtr);
Tcl_ListObjAppendElement(NULL, listPtr, objPtr);
stringPtr = p + 1;
}
TclNewStringObj(objPtr, stringPtr, end - stringPtr);
Tcl_ListObjAppendElement(NULL, listPtr, objPtr);
} else {
const char *element, *p, *splitEnd;
int splitLen;
Tcl_UniChar splitChar = 0;
/*
* Normal case: split on any of a given set of characters. Discard
* instances of the split characters.
*/
splitEnd = splitChars + splitCharLen;
for (element = stringPtr; stringPtr < end; stringPtr += len) {
len = TclUtfToUniChar(stringPtr, &ch);
for (p = splitChars; p < splitEnd; p += splitLen) {
splitLen = TclUtfToUniChar(p, &splitChar);
if (ch == splitChar) {
TclNewStringObj(objPtr, element, stringPtr - element);
Tcl_ListObjAppendElement(NULL, listPtr, objPtr);
element = stringPtr + len;
break;
}
}
}
TclNewStringObj(objPtr, element, stringPtr - element);
Tcl_ListObjAppendElement(NULL, listPtr, objPtr);
}
Tcl_SetObjResult(interp, listPtr);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringFirstCmd --
*
* This procedure is invoked to process the "string first" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringFirstCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_UniChar *needleStr, *haystackStr;
int match, start, needleLen, haystackLen;
if (objc < 3 || objc > 4) {
Tcl_WrongNumArgs(interp, 1, objv,
"needleString haystackString ?startIndex?");
return TCL_ERROR;
}
/*
* We are searching haystackStr for the sequence needleStr.
*/
match = -1;
start = 0;
haystackLen = -1;
needleStr = Tcl_GetUnicodeFromObj(objv[1], &needleLen);
haystackStr = Tcl_GetUnicodeFromObj(objv[2], &haystackLen);
if (objc == 4) {
/*
* If a startIndex is specified, we will need to fast forward to that
* point in the string before we think about a match.
*/
if (TclGetIntForIndexM(interp, objv[3], haystackLen-1,
&start) != TCL_OK){
return TCL_ERROR;
}
/*
* Reread to prevent shimmering problems.
*/
needleStr = Tcl_GetUnicodeFromObj(objv[1], &needleLen);
haystackStr = Tcl_GetUnicodeFromObj(objv[2], &haystackLen);
if (start >= haystackLen) {
goto str_first_done;
} else if (start > 0) {
haystackStr += start;
haystackLen -= start;
} else if (start < 0) {
/*
* Invalid start index mapped to string start; Bug #423581
*/
start = 0;
}
}
/*
* If the length of the needle is more than the length of the haystack, it
* cannot be contained in there so we can avoid searching. [Bug 2960021]
*/
if (needleLen > 0 && needleLen <= haystackLen) {
Tcl_UniChar *p, *end;
end = haystackStr + haystackLen - needleLen + 1;
for (p = haystackStr; p < end; p++) {
/*
* Scan forward to find the first character.
*/
if ((*p == *needleStr) && (TclUniCharNcmp(needleStr, p,
(unsigned long) needleLen) == 0)) {
match = p - haystackStr;
break;
}
}
}
/*
* Compute the character index of the matching string by counting the
* number of characters before the match.
*/
if ((match != -1) && (objc == 4)) {
match += start;
}
str_first_done:
Tcl_SetObjResult(interp, Tcl_NewIntObj(match));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringLastCmd --
*
* This procedure is invoked to process the "string last" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringLastCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_UniChar *needleStr, *haystackStr, *p;
int match, start, needleLen, haystackLen;
if (objc < 3 || objc > 4) {
Tcl_WrongNumArgs(interp, 1, objv,
"needleString haystackString ?startIndex?");
return TCL_ERROR;
}
/*
* We are searching haystackString for the sequence needleString.
*/
match = -1;
start = 0;
haystackLen = -1;
needleStr = Tcl_GetUnicodeFromObj(objv[1], &needleLen);
haystackStr = Tcl_GetUnicodeFromObj(objv[2], &haystackLen);
if (objc == 4) {
/*
* If a startIndex is specified, we will need to restrict the string
* range to that char index in the string
*/
if (TclGetIntForIndexM(interp, objv[3], haystackLen-1,
&start) != TCL_OK){
return TCL_ERROR;
}
/*
* Reread to prevent shimmering problems.
*/
needleStr = Tcl_GetUnicodeFromObj(objv[1], &needleLen);
haystackStr = Tcl_GetUnicodeFromObj(objv[2], &haystackLen);
if (start < 0) {
goto str_last_done;
} else if (start < haystackLen) {
p = haystackStr + start + 1 - needleLen;
} else {
p = haystackStr + haystackLen - needleLen;
}
} else {
p = haystackStr + haystackLen - needleLen;
}
/*
* If the length of the needle is more than the length of the haystack, it
* cannot be contained in there so we can avoid searching. [Bug 2960021]
*/
if (needleLen > 0 && needleLen <= haystackLen) {
for (; p >= haystackStr; p--) {
/*
* Scan backwards to find the first character.
*/
if ((*p == *needleStr) && !memcmp(needleStr, p,
sizeof(Tcl_UniChar) * (size_t)needleLen)) {
match = p - haystackStr;
break;
}
}
}
str_last_done:
Tcl_SetObjResult(interp, Tcl_NewIntObj(match));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringIndexCmd --
*
* This procedure is invoked to process the "string index" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringIndexCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int length, index;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "string charIndex");
return TCL_ERROR;
}
/*
* Get the char length to calulate what 'end' means.
*/
length = Tcl_GetCharLength(objv[1]);
if (TclGetIntForIndexM(interp, objv[2], length-1, &index) != TCL_OK) {
return TCL_ERROR;
}
if ((index >= 0) && (index < length)) {
int ch = TclGetUCS4(objv[1], index);
/*
* If we have a ByteArray object, we're careful to generate a new
* bytearray for a result.
*/
if (TclIsPureByteArray(objv[1])) {
unsigned char uch = UCHAR(ch);
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(&uch, 1));
} else {
char buf[8] = "";
length = TclUCS4ToUtf(ch, buf);
Tcl_SetObjResult(interp, Tcl_NewStringObj(buf, length));
}
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringIsCmd --
*
* This procedure is invoked to process the "string is" Tcl command. See
* the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringIsCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
const char *string1, *end, *stop;
int (*chcomp)(int) = NULL; /* The UniChar comparison function. */
int i, failat = 0, result = 1, strict = 0, index, length1, length2;
Tcl_Obj *objPtr, *failVarObj = NULL;
Tcl_WideInt w;
static const char *const isClasses[] = {
"alnum", "alpha", "ascii", "control",
"boolean", "digit", "double", "entier",
"false", "graph", "integer", "list",
"lower", "print", "punct", "space",
"true", "upper", "wideinteger", "wordchar",
"xdigit", NULL
};
enum isClasses {
STR_IS_ALNUM, STR_IS_ALPHA, STR_IS_ASCII, STR_IS_CONTROL,
STR_IS_BOOL, STR_IS_DIGIT, STR_IS_DOUBLE, STR_IS_ENTIER,
STR_IS_FALSE, STR_IS_GRAPH, STR_IS_INT, STR_IS_LIST,
STR_IS_LOWER, STR_IS_PRINT, STR_IS_PUNCT, STR_IS_SPACE,
STR_IS_TRUE, STR_IS_UPPER, STR_IS_WIDE, STR_IS_WORD,
STR_IS_XDIGIT
};
static const char *const isOptions[] = {
"-strict", "-failindex", NULL
};
enum isOptions {
OPT_STRICT, OPT_FAILIDX
};
if (objc < 3 || objc > 6) {
Tcl_WrongNumArgs(interp, 1, objv,
"class ?-strict? ?-failindex var? str");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[1], isClasses, "class", 0,
&index) != TCL_OK) {
return TCL_ERROR;
}
if (objc != 3) {
for (i = 2; i < objc-1; i++) {
int idx2;
if (Tcl_GetIndexFromObj(interp, objv[i], isOptions, "option", 0,
&idx2) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum isOptions) idx2) {
case OPT_STRICT:
strict = 1;
break;
case OPT_FAILIDX:
if (i+1 >= objc-1) {
Tcl_WrongNumArgs(interp, 2, objv,
"?-strict? ?-failindex var? str");
return TCL_ERROR;
}
failVarObj = objv[++i];
break;
}
}
}
/*
* We get the objPtr so that we can short-cut for some classes by checking
* the object type (int and double), but we need the string otherwise,
* because we don't want any conversion of type occuring (as, for example,
* Tcl_Get*FromObj would do).
*/
objPtr = objv[objc-1];
/*
* When entering here, result == 1 and failat == 0.
*/
switch ((enum isClasses) index) {
case STR_IS_ALNUM:
chcomp = Tcl_UniCharIsAlnum;
break;
case STR_IS_ALPHA:
chcomp = Tcl_UniCharIsAlpha;
break;
case STR_IS_ASCII:
chcomp = UniCharIsAscii;
break;
case STR_IS_BOOL:
case STR_IS_TRUE:
case STR_IS_FALSE:
if ((objPtr->typePtr != &tclBooleanType)
&& (TCL_OK != TclSetBooleanFromAny(NULL, objPtr))) {
if (strict) {
result = 0;
} else {
string1 = TclGetStringFromObj(objPtr, &length1);
result = length1 == 0;
}
} else if (((index == STR_IS_TRUE) &&
objPtr->internalRep.longValue == 0)
|| ((index == STR_IS_FALSE) &&
objPtr->internalRep.longValue != 0)) {
result = 0;
}
break;
case STR_IS_CONTROL:
chcomp = Tcl_UniCharIsControl;
break;
case STR_IS_DIGIT:
chcomp = Tcl_UniCharIsDigit;
break;
case STR_IS_DOUBLE: {
if ((objPtr->typePtr == &tclDoubleType) ||
(objPtr->typePtr == &tclIntType) ||
#ifndef TCL_WIDE_INT_IS_LONG
(objPtr->typePtr == &tclWideIntType) ||
#endif
(objPtr->typePtr == &tclBignumType)) {
break;
}
string1 = TclGetStringFromObj(objPtr, &length1);
if (length1 == 0) {
if (strict) {
result = 0;
}
goto str_is_done;
}
end = string1 + length1;
if (TclParseNumber(NULL, objPtr, NULL, NULL, -1,
(const char **) &stop, 0) != TCL_OK) {
result = 0;
failat = 0;
} else {
failat = stop - string1;
if (stop < end) {
result = 0;
TclFreeIntRep(objPtr);
}
}
break;
}
case STR_IS_GRAPH:
chcomp = Tcl_UniCharIsGraph;
break;
case STR_IS_INT:
if (TCL_OK == TclGetIntFromObj(NULL, objPtr, &i)) {
break;
}
goto failedIntParse;
case STR_IS_ENTIER:
if ((objPtr->typePtr == &tclIntType) ||
#ifndef TCL_WIDE_INT_IS_LONG
(objPtr->typePtr == &tclWideIntType) ||
#endif
(objPtr->typePtr == &tclBignumType)) {
break;
}
string1 = TclGetStringFromObj(objPtr, &length1);
if (length1 == 0) {
if (strict) {
result = 0;
}
goto str_is_done;
}
end = string1 + length1;
if (TclParseNumber(NULL, objPtr, NULL, NULL, -1,
(const char **) &stop, TCL_PARSE_INTEGER_ONLY) == TCL_OK) {
if (stop == end) {
/*
* Entire string parses as an integer.
*/
break;
} else {
/*
* Some prefix parsed as an integer, but not the whole string,
* so return failure index as the point where parsing stopped.
* Clear out the internal rep, since keeping it would leave
* *objPtr in an inconsistent state.
*/
result = 0;
failat = stop - string1;
TclFreeIntRep(objPtr);
}
} else {
/*
* No prefix is a valid integer. Fail at beginning.
*/
result = 0;
failat = 0;
}
break;
case STR_IS_WIDE:
if (TCL_OK == TclGetWideIntFromObj(NULL, objPtr, &w)) {
break;
}
failedIntParse:
string1 = TclGetStringFromObj(objPtr, &length1);
if (length1 == 0) {
if (strict) {
result = 0;
}
goto str_is_done;
}
result = 0;
if (failVarObj == NULL) {
/*
* Don't bother computing the failure point if we're not going to
* return it.
*/
break;
}
end = string1 + length1;
if (TclParseNumber(NULL, objPtr, NULL, NULL, -1,
(const char **) &stop, TCL_PARSE_INTEGER_ONLY) == TCL_OK) {
if (stop == end) {
/*
* Entire string parses as an integer, but rejected by
* Tcl_Get(Wide)IntFromObj() so we must have overflowed the
* target type, and our convention is to return failure at
* index -1 in that situation.
*/
failat = -1;
} else {
/*
* Some prefix parsed as an integer, but not the whole string,
* so return failure index as the point where parsing stopped.
* Clear out the internal rep, since keeping it would leave
* *objPtr in an inconsistent state.
*/
failat = stop - string1;
TclFreeIntRep(objPtr);
}
} else {
/*
* No prefix is a valid integer. Fail at beginning.
*/
failat = 0;
}
break;
case STR_IS_LIST:
/*
* We ignore the strictness here, since empty strings are always
* well-formed lists.
*/
if (TCL_OK == TclListObjLength(NULL, objPtr, &length2)) {
break;
}
if (failVarObj != NULL) {
/*
* Need to figure out where the list parsing failed, which is
* fairly expensive. This is adapted from the core of
* SetListFromAny().
*/
const char *elemStart, *nextElem;
int lenRemain, elemSize;
const char *p;
string1 = TclGetStringFromObj(objPtr, &length1);
end = string1 + length1;
failat = -1;
for (p=string1, lenRemain=length1; lenRemain > 0;
p=nextElem, lenRemain=end-nextElem) {
if (TCL_ERROR == TclFindElement(NULL, p, lenRemain,
&elemStart, &nextElem, &elemSize, NULL)) {
Tcl_Obj *tmpStr;
/*
* This is the simplest way of getting the number of
* characters parsed. Note that this is not the same as
* the number of bytes when parsing strings with non-ASCII
* characters in them.
*
* Skip leading spaces first. This is only really an issue
* if it is the first "element" that has the failure.
*/
while (TclIsSpaceProcM(*p)) {
p++;
}
TclNewStringObj(tmpStr, string1, p-string1);
failat = Tcl_GetCharLength(tmpStr);
TclDecrRefCount(tmpStr);
break;
}
}
}
result = 0;
break;
case STR_IS_LOWER:
chcomp = Tcl_UniCharIsLower;
break;
case STR_IS_PRINT:
chcomp = Tcl_UniCharIsPrint;
break;
case STR_IS_PUNCT:
chcomp = Tcl_UniCharIsPunct;
break;
case STR_IS_SPACE:
chcomp = Tcl_UniCharIsSpace;
break;
case STR_IS_UPPER:
chcomp = Tcl_UniCharIsUpper;
break;
case STR_IS_WORD:
chcomp = Tcl_UniCharIsWordChar;
break;
case STR_IS_XDIGIT:
chcomp = UniCharIsHexDigit;
break;
}
if (chcomp != NULL) {
string1 = TclGetStringFromObj(objPtr, &length1);
if (length1 == 0) {
if (strict) {
result = 0;
}
goto str_is_done;
}
end = string1 + length1;
for (; string1 < end; string1 += length2, failat++) {
int ucs4;
length2 = TclUtfToUCS4(string1, &ucs4);
if (!chcomp(ucs4)) {
result = 0;
break;
}
}
}
/*
* Only set the failVarObj when we will return 0 and we have indicated a
* valid fail index (>= 0).
*/
str_is_done:
if ((result == 0) && (failVarObj != NULL) &&
Tcl_ObjSetVar2(interp, failVarObj, NULL, Tcl_NewIntObj(failat),
TCL_LEAVE_ERR_MSG) == NULL) {
return TCL_ERROR;
}
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
return TCL_OK;
}
static int
UniCharIsAscii(
int character)
{
return (character >= 0) && (character < 0x80);
}
static int
UniCharIsHexDigit(
int character)
{
return (character >= 0) && (character < 0x80) && isxdigit(character);
}
/*
*----------------------------------------------------------------------
*
* StringMapCmd --
*
* This procedure is invoked to process the "string map" Tcl command. See
* the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringMapCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int length1, length2, mapElemc, index;
int nocase = 0, mapWithDict = 0, copySource = 0;
Tcl_Obj **mapElemv, *sourceObj, *resultPtr;
Tcl_UniChar *ustring1, *ustring2, *p, *end;
int (*strCmpFn)(const Tcl_UniChar*, const Tcl_UniChar*, unsigned long);
if (objc < 3 || objc > 4) {
Tcl_WrongNumArgs(interp, 1, objv, "?-nocase? charMap string");
return TCL_ERROR;
}
if (objc == 4) {
const char *string = TclGetStringFromObj(objv[1], &length2);
if ((length2 > 1) &&
strncmp(string, "-nocase", length2) == 0) {
nocase = 1;
} else {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad option \"%s\": must be -nocase", string));
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INDEX", "option",
string, NULL);
return TCL_ERROR;
}
}
/*
* This test is tricky, but has to be that way or you get other strange
* inconsistencies (see test string-10.20 for illustration why!)
*/
if (objv[objc-2]->typePtr == &tclDictType && objv[objc-2]->bytes == NULL){
int i, done;
Tcl_DictSearch search;
/*
* We know the type exactly, so all dict operations will succeed for
* sure. This shortens this code quite a bit.
*/
Tcl_DictObjSize(interp, objv[objc-2], &mapElemc);
if (mapElemc == 0) {
/*
* Empty charMap, just return whatever string was given.
*/
Tcl_SetObjResult(interp, objv[objc-1]);
return TCL_OK;
}
mapElemc *= 2;
mapWithDict = 1;
/*
* Copy the dictionary out into an array; that's the easiest way to
* adapt this code...
*/
mapElemv = TclStackAlloc(interp, sizeof(Tcl_Obj *) * mapElemc);
Tcl_DictObjFirst(interp, objv[objc-2], &search, mapElemv+0,
mapElemv+1, &done);
for (i=2 ; i<mapElemc ; i+=2) {
Tcl_DictObjNext(&search, mapElemv+i, mapElemv+i+1, &done);
}
Tcl_DictObjDone(&search);
} else {
if (TclListObjGetElements(interp, objv[objc-2], &mapElemc,
&mapElemv) != TCL_OK) {
return TCL_ERROR;
}
if (mapElemc == 0) {
/*
* empty charMap, just return whatever string was given.
*/
Tcl_SetObjResult(interp, objv[objc-1]);
return TCL_OK;
} else if (mapElemc & 1) {
/*
* The charMap must be an even number of key/value items.
*/
Tcl_SetObjResult(interp,
Tcl_NewStringObj("char map list unbalanced", -1));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "MAP",
"UNBALANCED", NULL);
return TCL_ERROR;
}
}
/*
* Take a copy of the source string object if it is the same as the map
* string to cut out nasty sharing crashes. [Bug 1018562]
*/
if (objv[objc-2] == objv[objc-1]) {
sourceObj = Tcl_DuplicateObj(objv[objc-1]);
copySource = 1;
} else {
sourceObj = objv[objc-1];
}
ustring1 = Tcl_GetUnicodeFromObj(sourceObj, &length1);
if (length1 == 0) {
/*
* Empty input string, just stop now.
*/
goto done;
}
end = ustring1 + length1;
strCmpFn = (nocase ? Tcl_UniCharNcasecmp : Tcl_UniCharNcmp);
/*
* Force result to be Unicode
*/
resultPtr = Tcl_NewUnicodeObj(ustring1, 0);
if (mapElemc == 2) {
/*
* Special case for one map pair which avoids the extra for loop and
* extra calls to get Unicode data. The algorithm is otherwise
* identical to the multi-pair case. This will be >30% faster on
* larger strings.
*/
int mapLen;
Tcl_UniChar *mapString, u2lc;
ustring2 = Tcl_GetUnicodeFromObj(mapElemv[0], &length2);
p = ustring1;
if ((length2 > length1) || (length2 == 0)) {
/*
* Match string is either longer than input or empty.
*/
ustring1 = end;
} else {
mapString = Tcl_GetUnicodeFromObj(mapElemv[1], &mapLen);
u2lc = (nocase ? Tcl_UniCharToLower(*ustring2) : 0);
for (; ustring1 < end; ustring1++) {
if (((*ustring1 == *ustring2) ||
(nocase&&Tcl_UniCharToLower(*ustring1)==u2lc)) &&
(length2==1 || strCmpFn(ustring1, ustring2,
(unsigned long) length2) == 0)) {
if (p != ustring1) {
Tcl_AppendUnicodeToObj(resultPtr, p, ustring1-p);
p = ustring1 + length2;
} else {
p += length2;
}
ustring1 = p - 1;
Tcl_AppendUnicodeToObj(resultPtr, mapString, mapLen);
}
}
}
} else {
Tcl_UniChar **mapStrings, *u2lc = NULL;
int *mapLens;
/*
* Precompute pointers to the unicode string and length. This saves us
* repeated function calls later, significantly speeding up the
* algorithm. We only need the lowercase first char in the nocase
* case.
*/
mapStrings = TclStackAlloc(interp, mapElemc*2*sizeof(Tcl_UniChar *));
mapLens = TclStackAlloc(interp, mapElemc * 2 * sizeof(int));
if (nocase) {
u2lc = TclStackAlloc(interp, mapElemc * sizeof(Tcl_UniChar));
}
for (index = 0; index < mapElemc; index++) {
mapStrings[index] = Tcl_GetUnicodeFromObj(mapElemv[index],
mapLens+index);
if (nocase && ((index % 2) == 0)) {
u2lc[index/2] = Tcl_UniCharToLower(*mapStrings[index]);
}
}
for (p = ustring1; ustring1 < end; ustring1++) {
for (index = 0; index < mapElemc; index += 2) {
/*
* Get the key string to match on.
*/
ustring2 = mapStrings[index];
length2 = mapLens[index];
if ((length2 > 0) && ((*ustring1 == *ustring2) || (nocase &&
(Tcl_UniCharToLower(*ustring1) == u2lc[index/2]))) &&
/* Restrict max compare length. */
(end-ustring1 >= length2) && ((length2 == 1) ||
!strCmpFn(ustring2, ustring1, length2))) {
if (p != ustring1) {
/*
* Put the skipped chars onto the result first.
*/
Tcl_AppendUnicodeToObj(resultPtr, p, ustring1-p);
p = ustring1 + length2;
} else {
p += length2;
}
/*
* Adjust len to be full length of matched string.
*/
ustring1 = p - 1;
/*
* Append the map value to the unicode string.
*/
Tcl_AppendUnicodeToObj(resultPtr,
mapStrings[index+1], mapLens[index+1]);
break;
}
}
}
if (nocase) {
TclStackFree(interp, u2lc);
}
TclStackFree(interp, mapLens);
TclStackFree(interp, mapStrings);
}
if (p != ustring1) {
/*
* Put the rest of the unmapped chars onto result.
*/
Tcl_AppendUnicodeToObj(resultPtr, p, ustring1 - p);
}
Tcl_SetObjResult(interp, resultPtr);
done:
if (mapWithDict) {
TclStackFree(interp, mapElemv);
}
if (copySource) {
Tcl_DecrRefCount(sourceObj);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringMatchCmd --
*
* This procedure is invoked to process the "string match" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringMatchCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int nocase = 0;
if (objc < 3 || objc > 4) {
Tcl_WrongNumArgs(interp, 1, objv, "?-nocase? pattern string");
return TCL_ERROR;
}
if (objc == 4) {
int length;
const char *string = TclGetStringFromObj(objv[1], &length);
if ((length > 1) &&
strncmp(string, "-nocase", length) == 0) {
nocase = TCL_MATCH_NOCASE;
} else {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad option \"%s\": must be -nocase", string));
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INDEX", "option",
string, NULL);
return TCL_ERROR;
}
}
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(
TclStringMatchObj(objv[objc-1], objv[objc-2], nocase)));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringRangeCmd --
*
* This procedure is invoked to process the "string range" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringRangeCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int length, first, last;
if (objc != 4) {
Tcl_WrongNumArgs(interp, 1, objv, "string first last");
return TCL_ERROR;
}
/*
* Get the length in actual characters; Then reduce it by one because
* 'end' refers to the last character, not one past it.
*/
length = Tcl_GetCharLength(objv[1]) - 1;
if (TclGetIntForIndexM(interp, objv[2], length, &first) != TCL_OK ||
TclGetIntForIndexM(interp, objv[3], length, &last) != TCL_OK) {
return TCL_ERROR;
}
if (first < 0) {
first = 0;
}
if (last >= length) {
last = length;
}
if (last >= first) {
Tcl_SetObjResult(interp, Tcl_GetRange(objv[1], first, last));
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringReptCmd --
*
* This procedure is invoked to process the "string repeat" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringReptCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
const char *string1;
char *string2;
int count, index, length1, length2;
Tcl_Obj *resultPtr;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "string count");
return TCL_ERROR;
}
if (TclGetIntFromObj(interp, objv[2], &count) != TCL_OK) {
return TCL_ERROR;
}
/*
* Check for cases that allow us to skip copying stuff.
*/
if (count == 1) {
Tcl_SetObjResult(interp, objv[1]);
goto done;
} else if (count < 1) {
goto done;
}
string1 = TclGetStringFromObj(objv[1], &length1);
if (length1 <= 0) {
goto done;
}
/*
* Only build up a string that has data. Instead of building it up with
* repeated appends, we just allocate the necessary space once and copy
* the string value in.
*
* We have to worry about overflow [Bugs 714106, 2561746].
* At this point we know 1 <= length1 <= INT_MAX and 2 <= count <= INT_MAX.
* We need to keep 2 <= length2 <= INT_MAX.
*/
if (count > INT_MAX/length1) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"result exceeds max size for a Tcl value (%d bytes)",
INT_MAX));
Tcl_SetErrorCode(interp, "TCL", "MEMORY", NULL);
return TCL_ERROR;
}
length2 = length1 * count;
/*
* Include space for the NUL.
*/
string2 = attemptckalloc(length2 + 1);
if (string2 == NULL) {
/*
* Alloc failed. Note that in this case we try to do an error message
* since this is a case that's most likely when the alloc is large and
* that's easy to do with this API. Note that if we fail allocating a
* short string, this will likely keel over too (and fatally).
*/
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"string size overflow, out of memory allocating %u bytes",
length2 + 1));
Tcl_SetErrorCode(interp, "TCL", "MEMORY", NULL);
return TCL_ERROR;
}
for (index = 0; index < count; index++) {
memcpy(string2 + (length1 * index), string1, length1);
}
string2[length2] = '\0';
/*
* We have to directly assign this instead of using Tcl_SetStringObj (and
* indirectly TclInitStringRep) because that makes another copy of the
* data.
*/
TclNewObj(resultPtr);
resultPtr->bytes = string2;
resultPtr->length = length2;
Tcl_SetObjResult(interp, resultPtr);
done:
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringRplcCmd --
*
* This procedure is invoked to process the "string replace" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringRplcCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_UniChar *ustring;
int first, last, length, end;
if (objc < 4 || objc > 5) {
Tcl_WrongNumArgs(interp, 1, objv, "string first last ?string?");
return TCL_ERROR;
}
ustring = Tcl_GetUnicodeFromObj(objv[1], &length);
end = length - 1;
if (TclGetIntForIndexM(interp, objv[2], end, &first) != TCL_OK ||
TclGetIntForIndexM(interp, objv[3], end, &last) != TCL_OK){
return TCL_ERROR;
}
/*
* The following test screens out most empty substrings as
* candidates for replacement. When they are detected, no
* replacement is done, and the result is the original string,
*/
if ((last < 0) || /* Range ends before start of string */
(first > end) || /* Range begins after end of string */
(last < first)) { /* Range begins after it starts */
/*
* BUT!!! when (end < 0) -- an empty original string -- we can
* have (first <= end < 0 <= last) and an empty string is permitted
* to be replaced.
*/
Tcl_SetObjResult(interp, objv[1]);
} else {
Tcl_Obj *resultPtr;
/*
* We are re-fetching in case the string argument is same value as
* an index argument, and shimmering cost us our ustring.
*/
ustring = Tcl_GetUnicodeFromObj(objv[1], &length);
end = length-1;
if (first < 0) {
first = 0;
}
resultPtr = Tcl_NewUnicodeObj(ustring, first);
if (objc == 5) {
Tcl_AppendObjToObj(resultPtr, objv[4]);
}
if (last < end) {
Tcl_AppendUnicodeToObj(resultPtr, ustring + last + 1,
end - last);
}
Tcl_SetObjResult(interp, resultPtr);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringRevCmd --
*
* This procedure is invoked to process the "string reverse" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringRevCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
if (objc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "string");
return TCL_ERROR;
}
Tcl_SetObjResult(interp, TclStringReverse(objv[1]));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringStartCmd --
*
* This procedure is invoked to process the "string wordstart" Tcl
* command. See the user documentation for details on what it does. Note
* that this command only functions correctly on properly formed Tcl UTF
* strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringStartCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_UniChar ch = 0;
const char *p, *string;
int cur, index, length, numChars;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "string index");
return TCL_ERROR;
}
string = TclGetStringFromObj(objv[1], &length);
numChars = Tcl_NumUtfChars(string, length);
if (TclGetIntForIndexM(interp, objv[2], numChars-1, &index) != TCL_OK) {
return TCL_ERROR;
}
string = TclGetStringFromObj(objv[1], &length);
if (index >= numChars) {
index = numChars - 1;
}
cur = 0;
if (index > 0) {
p = Tcl_UtfAtIndex(string, index);
TclUtfToUniChar(p, &ch);
for (cur = index; cur >= 0; cur--) {
int delta = 0;
const char *next;
if (!Tcl_UniCharIsWordChar(ch)) {
break;
}
next = TclUtfPrev(p, string);
do {
next += delta;
delta = TclUtfToUniChar(next, &ch);
} while (next + delta < p);
p = next;
}
if (cur != index) {
cur += 1;
}
}
Tcl_SetObjResult(interp, Tcl_NewIntObj(cur));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringEndCmd --
*
* This procedure is invoked to process the "string wordend" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringEndCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_UniChar ch = 0;
const char *p, *end, *string;
int cur, index, length, numChars;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "string index");
return TCL_ERROR;
}
string = TclGetStringFromObj(objv[1], &length);
numChars = Tcl_NumUtfChars(string, length);
if (TclGetIntForIndexM(interp, objv[2], numChars-1, &index) != TCL_OK) {
return TCL_ERROR;
}
string = TclGetStringFromObj(objv[1], &length);
if (index < 0) {
index = 0;
}
if (index < numChars) {
p = Tcl_UtfAtIndex(string, index);
end = string+length;
for (cur = index; p < end; cur++) {
p += TclUtfToUniChar(p, &ch);
if (!Tcl_UniCharIsWordChar(ch)) {
break;
}
}
if (cur == index) {
cur++;
}
} else {
cur = numChars;
}
Tcl_SetObjResult(interp, Tcl_NewIntObj(cur));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringEqualCmd --
*
* This procedure is invoked to process the "string equal" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringEqualCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
/*
* Remember to keep code here in some sync with the byte-compiled versions
* in tclExecute.c (INST_STR_EQ, INST_STR_NEQ and INST_STR_CMP as well as
* the expr string comparison in INST_EQ/INST_NEQ/INST_LT/...).
*/
const char *string2;
int length2, i, match, nocase = 0, reqlength = -1;
if (objc < 3 || objc > 6) {
str_cmp_args:
Tcl_WrongNumArgs(interp, 1, objv,
"?-nocase? ?-length int? string1 string2");
return TCL_ERROR;
}
for (i = 1; i < objc-2; i++) {
string2 = TclGetStringFromObj(objv[i], &length2);
if ((length2 > 1) && !strncmp(string2, "-nocase", length2)) {
nocase = 1;
} else if ((length2 > 1)
&& !strncmp(string2, "-length", length2)) {
if (i+1 >= objc-2) {
goto str_cmp_args;
}
i++;
if (TclGetIntFromObj(interp, objv[i], &reqlength) != TCL_OK) {
return TCL_ERROR;
}
} else {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad option \"%s\": must be -nocase or -length",
string2));
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INDEX", "option",
string2, NULL);
return TCL_ERROR;
}
}
/*
* From now on, we only access the two objects at the end of the argument
* array.
*/
objv += objc-2;
match = TclStringCmp(objv[0], objv[1], 0, nocase, reqlength);
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(match ? 0 : 1));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringCmpCmd --
*
* This procedure is invoked to process the "string compare" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringCmpCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
/*
* Remember to keep code here in some sync with the byte-compiled versions
* in tclExecute.c (INST_STR_EQ, INST_STR_NEQ and INST_STR_CMP as well as
* the expr string comparison in INST_EQ/INST_NEQ/INST_LT/...).
*/
int match, nocase, reqlength, status;
status = TclStringCmpOpts(interp, objc, objv, &nocase, &reqlength);
if (status != TCL_OK) {
return status;
}
objv += objc-2;
match = TclStringCmp(objv[0], objv[1], 0, nocase, reqlength);
Tcl_SetObjResult(interp, Tcl_NewIntObj(match));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TclStringCmp --
*
* This is the core of Tcl's string comparison. It only handles byte
* arrays, UNICODE strings and UTF-8 strings correctly.
*
* Results:
* -1 if value1Ptr is less than value2Ptr, 0 if they are equal, or 1 if
* value1Ptr is greater.
*
* Side effects:
* May cause string representations of objects to be allocated.
*
*----------------------------------------------------------------------
*/
int
TclStringCmp(
Tcl_Obj *value1Ptr,
Tcl_Obj *value2Ptr,
int checkEq, /* comparison is only for equality */
int nocase, /* comparison is not case sensitive */
int reqlength) /* requested length; -1 to compare whole
* strings */
{
const char *s1, *s2;
int empty, length, match, s1len, s2len;
memCmpFn_t memCmpFn;
if ((reqlength == 0) || (value1Ptr == value2Ptr)) {
/*
* Always match at 0 chars or if it is the same obj.
*/
return 0;
}
if (!nocase && TclIsPureByteArray(value1Ptr)
&& TclIsPureByteArray(value2Ptr)) {
/*
* Use binary versions of comparisons since that won't cause undue
* type conversions and it is much faster. Only do this if we're
* case-sensitive (which is all that really makes sense with byte
* arrays anyway, and we have no memcasecmp() for some reason... :^)
*/
s1 = (char *) Tcl_GetByteArrayFromObj(value1Ptr, &s1len);
s2 = (char *) Tcl_GetByteArrayFromObj(value2Ptr, &s2len);
memCmpFn = memcmp;
} else if ((value1Ptr->typePtr == &tclStringType)
&& (value2Ptr->typePtr == &tclStringType)) {
/*
* Do a unicode-specific comparison if both of the args are of String
* type. If the char length == byte length, we can do a memcmp. In
* benchmark testing this proved the most efficient check between the
* unicode and string comparison operations.
*/
if (nocase) {
s1 = (char *) Tcl_GetUnicodeFromObj(value1Ptr, &s1len);
s2 = (char *) Tcl_GetUnicodeFromObj(value2Ptr, &s2len);
memCmpFn = (memCmpFn_t)Tcl_UniCharNcasecmp;
} else {
s1len = Tcl_GetCharLength(value1Ptr);
s2len = Tcl_GetCharLength(value2Ptr);
if ((s1len == value1Ptr->length)
&& (value1Ptr->bytes != NULL)
&& (s2len == value2Ptr->length)
&& (value2Ptr->bytes != NULL)) {
s1 = value1Ptr->bytes;
s2 = value2Ptr->bytes;
memCmpFn = memcmp;
} else {
s1 = (char *) Tcl_GetUnicode(value1Ptr);
s2 = (char *) Tcl_GetUnicode(value2Ptr);
if (
#if defined(WORDS_BIGENDIAN) && (TCL_UTF_MAX != 4)
1
#else
checkEq
#endif /* WORDS_BIGENDIAN */
) {
memCmpFn = memcmp;
s1len *= sizeof(Tcl_UniChar);
s2len *= sizeof(Tcl_UniChar);
} else {
memCmpFn = (memCmpFn_t) Tcl_UniCharNcmp;
}
}
}
} else {
/*
* Get the string representations, being careful in case we have
* special empty string objects about.
*/
empty = TclCheckEmptyString(value1Ptr);
if (empty > 0) {
switch (TclCheckEmptyString(value2Ptr)) {
case -1:
s1 = "";
s1len = 0;
s2 = TclGetStringFromObj(value2Ptr, &s2len);
break;
case 0:
return -1;
default: /* avoid warn: `s2` may be used uninitialized */
return 0;
}
} else if (TclCheckEmptyString(value2Ptr) > 0) {
switch (empty) {
case -1:
s2 = "";
s2len = 0;
s1 = TclGetStringFromObj(value1Ptr, &s1len);
break;
case 0:
return 1;
default: /* avoid warn: `s1` may be used uninitialized */
return 0;
}
} else {
s1 = TclGetStringFromObj(value1Ptr, &s1len);
s2 = TclGetStringFromObj(value2Ptr, &s2len);
}
if (!nocase && checkEq) {
/*
* When we have equal-length we can check only for (in)equality.
* We can use memcmp() in all (n)eq cases because we don't need to
* worry about lexical LE/BE variance.
*/
memCmpFn = memcmp;
} else {
/*
* As a catch-all we will work with UTF-8. We cannot use memcmp()
* as that is unsafe with any string containing NUL (\xC0\x80 in
* Tcl's utf rep). We can use the more efficient TclpUtfNcmp2 if
* we are case-sensitive and no specific length was requested.
*/
if ((reqlength < 0) && !nocase) {
memCmpFn = (memCmpFn_t) TclpUtfNcmp2;
} else {
s1len = Tcl_NumUtfChars(s1, s1len);
s2len = Tcl_NumUtfChars(s2, s2len);
memCmpFn = (memCmpFn_t)
(nocase ? Tcl_UtfNcasecmp : Tcl_UtfNcmp);
}
}
}
length = (s1len < s2len) ? s1len : s2len;
if (reqlength > 0 && reqlength < length) {
length = reqlength;
} else if (reqlength < 0) {
/*
* The requested length is negative, so we ignore it by setting it to
* length + 1 so we correct the match var.
*/
reqlength = length + 1;
}
if (checkEq && (s1len != s2len)) {
match = 1; /* This will be reversed below. */
} else {
/*
* The comparison function should compare up to the minimum byte
* length only.
*/
match = memCmpFn(s1, s2, length);
}
if ((match == 0) && (reqlength > length)) {
match = s1len - s2len;
}
return (match > 0) ? 1 : (match < 0) ? -1 : 0;
}
int TclStringCmpOpts(
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[], /* Argument objects. */
int *nocase,
int *reqlength)
{
int i, length;
const char *string;
*reqlength = -1;
*nocase = 0;
if (objc < 3 || objc > 6) {
str_cmp_args:
Tcl_WrongNumArgs(interp, 1, objv,
"?-nocase? ?-length int? string1 string2");
return TCL_ERROR;
}
for (i = 1; i < objc-2; i++) {
string = TclGetStringFromObj(objv[i], &length);
if ((length > 1) && !strncmp(string, "-nocase", length)) {
*nocase = 1;
} else if ((length > 1)
&& !strncmp(string, "-length", length)) {
if (i+1 >= objc-2) {
goto str_cmp_args;
}
i++;
if (TclGetIntFromObj(interp, objv[i], reqlength) != TCL_OK) {
return TCL_ERROR;
}
} else {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad option \"%s\": must be -nocase or -length",
string));
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INDEX", "option",
string, NULL);
return TCL_ERROR;
}
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringCatCmd --
*
* This procedure is invoked to process the "string cat" Tcl command.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringCatCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int i;
Tcl_Obj *objResultPtr;
if (objc < 2) {
/*
* If there are no args, the result is an empty object.
* Just leave the preset empty interp result.
*/
return TCL_OK;
}
if (objc == 2) {
/*
* Other trivial case, single arg, just return it.
*/
Tcl_SetObjResult(interp, objv[1]);
return TCL_OK;
}
objResultPtr = objv[1];
if (Tcl_IsShared(objResultPtr)) {
objResultPtr = Tcl_DuplicateObj(objResultPtr);
}
for(i = 2;i < objc;i++) {
Tcl_AppendObjToObj(objResultPtr, objv[i]);
}
Tcl_SetObjResult(interp, objResultPtr);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringBytesCmd --
*
* This procedure is invoked to process the "string bytelength" Tcl
* command. See the user documentation for details on what it does. Note
* that this command only functions correctly on properly formed Tcl UTF
* strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringBytesCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int length;
if (objc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "string");
return TCL_ERROR;
}
(void) TclGetStringFromObj(objv[1], &length);
Tcl_SetObjResult(interp, Tcl_NewIntObj(length));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringLenCmd --
*
* This procedure is invoked to process the "string length" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringLenCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
if (objc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "string");
return TCL_ERROR;
}
Tcl_SetObjResult(interp, Tcl_NewIntObj(Tcl_GetCharLength(objv[1])));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringLowerCmd --
*
* This procedure is invoked to process the "string tolower" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringLowerCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int length1, length2;
const char *string1;
char *string2;
if (objc < 2 || objc > 4) {
Tcl_WrongNumArgs(interp, 1, objv, "string ?first? ?last?");
return TCL_ERROR;
}
string1 = TclGetStringFromObj(objv[1], &length1);
if (objc == 2) {
Tcl_Obj *resultPtr = Tcl_NewStringObj(string1, length1);
length1 = Tcl_UtfToLower(TclGetString(resultPtr));
Tcl_SetObjLength(resultPtr, length1);
Tcl_SetObjResult(interp, resultPtr);
} else {
int first, last;
const char *start, *end;
Tcl_Obj *resultPtr;
length1 = Tcl_NumUtfChars(string1, length1) - 1;
if (TclGetIntForIndexM(interp,objv[2],length1, &first) != TCL_OK) {
return TCL_ERROR;
}
if (first < 0) {
first = 0;
}
last = first;
if ((objc == 4) && (TclGetIntForIndexM(interp, objv[3], length1,
&last) != TCL_OK)) {
return TCL_ERROR;
}
if (last >= length1) {
last = length1;
}
if (last < first) {
Tcl_SetObjResult(interp, objv[1]);
return TCL_OK;
}
string1 = TclGetStringFromObj(objv[1], &length1);
start = Tcl_UtfAtIndex(string1, first);
end = Tcl_UtfAtIndex(start, last - first + 1);
resultPtr = Tcl_NewStringObj(string1, end - string1);
string2 = TclGetString(resultPtr) + (start - string1);
length2 = Tcl_UtfToLower(string2);
Tcl_SetObjLength(resultPtr, length2 + (start - string1));
Tcl_AppendToObj(resultPtr, end, -1);
Tcl_SetObjResult(interp, resultPtr);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringUpperCmd --
*
* This procedure is invoked to process the "string toupper" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringUpperCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int length1, length2;
const char *string1;
char *string2;
if (objc < 2 || objc > 4) {
Tcl_WrongNumArgs(interp, 1, objv, "string ?first? ?last?");
return TCL_ERROR;
}
string1 = TclGetStringFromObj(objv[1], &length1);
if (objc == 2) {
Tcl_Obj *resultPtr = Tcl_NewStringObj(string1, length1);
length1 = Tcl_UtfToUpper(TclGetString(resultPtr));
Tcl_SetObjLength(resultPtr, length1);
Tcl_SetObjResult(interp, resultPtr);
} else {
int first, last;
const char *start, *end;
Tcl_Obj *resultPtr;
length1 = Tcl_NumUtfChars(string1, length1) - 1;
if (TclGetIntForIndexM(interp,objv[2],length1, &first) != TCL_OK) {
return TCL_ERROR;
}
if (first < 0) {
first = 0;
}
last = first;
if ((objc == 4) && (TclGetIntForIndexM(interp, objv[3], length1,
&last) != TCL_OK)) {
return TCL_ERROR;
}
if (last >= length1) {
last = length1;
}
if (last < first) {
Tcl_SetObjResult(interp, objv[1]);
return TCL_OK;
}
string1 = TclGetStringFromObj(objv[1], &length1);
start = Tcl_UtfAtIndex(string1, first);
end = Tcl_UtfAtIndex(start, last - first + 1);
resultPtr = Tcl_NewStringObj(string1, end - string1);
string2 = TclGetString(resultPtr) + (start - string1);
length2 = Tcl_UtfToUpper(string2);
Tcl_SetObjLength(resultPtr, length2 + (start - string1));
Tcl_AppendToObj(resultPtr, end, -1);
Tcl_SetObjResult(interp, resultPtr);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringTitleCmd --
*
* This procedure is invoked to process the "string totitle" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringTitleCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int length1, length2;
const char *string1;
char *string2;
if (objc < 2 || objc > 4) {
Tcl_WrongNumArgs(interp, 1, objv, "string ?first? ?last?");
return TCL_ERROR;
}
string1 = TclGetStringFromObj(objv[1], &length1);
if (objc == 2) {
Tcl_Obj *resultPtr = Tcl_NewStringObj(string1, length1);
length1 = Tcl_UtfToTitle(TclGetString(resultPtr));
Tcl_SetObjLength(resultPtr, length1);
Tcl_SetObjResult(interp, resultPtr);
} else {
int first, last;
const char *start, *end;
Tcl_Obj *resultPtr;
length1 = Tcl_NumUtfChars(string1, length1) - 1;
if (TclGetIntForIndexM(interp,objv[2],length1, &first) != TCL_OK) {
return TCL_ERROR;
}
if (first < 0) {
first = 0;
}
last = first;
if ((objc == 4) && (TclGetIntForIndexM(interp, objv[3], length1,
&last) != TCL_OK)) {
return TCL_ERROR;
}
if (last >= length1) {
last = length1;
}
if (last < first) {
Tcl_SetObjResult(interp, objv[1]);
return TCL_OK;
}
string1 = TclGetStringFromObj(objv[1], &length1);
start = Tcl_UtfAtIndex(string1, first);
end = Tcl_UtfAtIndex(start, last - first + 1);
resultPtr = Tcl_NewStringObj(string1, end - string1);
string2 = TclGetString(resultPtr) + (start - string1);
length2 = Tcl_UtfToTitle(string2);
Tcl_SetObjLength(resultPtr, length2 + (start - string1));
Tcl_AppendToObj(resultPtr, end, -1);
Tcl_SetObjResult(interp, resultPtr);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringTrimCmd --
*
* This procedure is invoked to process the "string trim" Tcl command.
* See the user documentation for details on what it does. Note that this
* command only functions correctly on properly formed Tcl UTF strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringTrimCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
const char *string1, *string2;
int triml, trimr, length1, length2;
if (objc == 3) {
string2 = TclGetStringFromObj(objv[2], &length2);
} else if (objc == 2) {
string2 = tclDefaultTrimSet;
length2 = strlen(tclDefaultTrimSet);
} else {
Tcl_WrongNumArgs(interp, 1, objv, "string ?chars?");
return TCL_ERROR;
}
string1 = TclGetStringFromObj(objv[1], &length1);
triml = TclTrim(string1, length1, string2, length2, &trimr);
Tcl_SetObjResult(interp,
Tcl_NewStringObj(string1 + triml, length1 - triml - trimr));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringTrimLCmd --
*
* This procedure is invoked to process the "string trimleft" Tcl
* command. See the user documentation for details on what it does. Note
* that this command only functions correctly on properly formed Tcl UTF
* strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringTrimLCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
const char *string1, *string2;
int trim, length1, length2;
if (objc == 3) {
string2 = TclGetStringFromObj(objv[2], &length2);
} else if (objc == 2) {
string2 = tclDefaultTrimSet;
length2 = strlen(tclDefaultTrimSet);
} else {
Tcl_WrongNumArgs(interp, 1, objv, "string ?chars?");
return TCL_ERROR;
}
string1 = TclGetStringFromObj(objv[1], &length1);
trim = TclTrimLeft(string1, length1, string2, length2);
Tcl_SetObjResult(interp, Tcl_NewStringObj(string1+trim, length1-trim));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* StringTrimRCmd --
*
* This procedure is invoked to process the "string trimright" Tcl
* command. See the user documentation for details on what it does. Note
* that this command only functions correctly on properly formed Tcl UTF
* strings.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
StringTrimRCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
const char *string1, *string2;
int trim, length1, length2;
if (objc == 3) {
string2 = TclGetStringFromObj(objv[2], &length2);
} else if (objc == 2) {
string2 = tclDefaultTrimSet;
length2 = strlen(tclDefaultTrimSet);
} else {
Tcl_WrongNumArgs(interp, 1, objv, "string ?chars?");
return TCL_ERROR;
}
string1 = TclGetStringFromObj(objv[1], &length1);
trim = TclTrimRight(string1, length1, string2, length2);
Tcl_SetObjResult(interp, Tcl_NewStringObj(string1, length1-trim));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TclInitStringCmd --
*
* This procedure creates the "string" Tcl command. See the user
* documentation for details on what it does. Note that this command only
* functions correctly on properly formed Tcl UTF strings.
*
* Also note that the primary methods here (equal, compare, match, ...)
* have bytecode equivalents. You will find the code for those in
* tclExecute.c. The code here will only be used in the non-bc case (like
* in an 'eval').
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
Tcl_Command
TclInitStringCmd(
Tcl_Interp *interp) /* Current interpreter. */
{
static const EnsembleImplMap stringImplMap[] = {
{"bytelength", StringBytesCmd, TclCompileBasic1ArgCmd, NULL, NULL, 0},
{"cat", StringCatCmd, TclCompileStringCatCmd, NULL, NULL, 0},
{"compare", StringCmpCmd, TclCompileStringCmpCmd, NULL, NULL, 0},
{"equal", StringEqualCmd, TclCompileStringEqualCmd, NULL, NULL, 0},
{"first", StringFirstCmd, TclCompileStringFirstCmd, NULL, NULL, 0},
{"index", StringIndexCmd, TclCompileStringIndexCmd, NULL, NULL, 0},
{"is", StringIsCmd, TclCompileStringIsCmd, NULL, NULL, 0},
{"last", StringLastCmd, TclCompileStringLastCmd, NULL, NULL, 0},
{"length", StringLenCmd, TclCompileStringLenCmd, NULL, NULL, 0},
{"map", StringMapCmd, TclCompileStringMapCmd, NULL, NULL, 0},
{"match", StringMatchCmd, TclCompileStringMatchCmd, NULL, NULL, 0},
{"range", StringRangeCmd, TclCompileStringRangeCmd, NULL, NULL, 0},
{"repeat", StringReptCmd, TclCompileBasic2ArgCmd, NULL, NULL, 0},
{"replace", StringRplcCmd, TclCompileStringReplaceCmd, NULL, NULL, 0},
{"reverse", StringRevCmd, TclCompileBasic1ArgCmd, NULL, NULL, 0},
{"tolower", StringLowerCmd, TclCompileStringToLowerCmd, NULL, NULL, 0},
{"toupper", StringUpperCmd, TclCompileStringToUpperCmd, NULL, NULL, 0},
{"totitle", StringTitleCmd, TclCompileStringToTitleCmd, NULL, NULL, 0},
{"trim", StringTrimCmd, TclCompileStringTrimCmd, NULL, NULL, 0},
{"trimleft", StringTrimLCmd, TclCompileStringTrimLCmd, NULL, NULL, 0},
{"trimright", StringTrimRCmd, TclCompileStringTrimRCmd, NULL, NULL, 0},
{"wordend", StringEndCmd, TclCompileBasic2ArgCmd, NULL, NULL, 0},
{"wordstart", StringStartCmd, TclCompileBasic2ArgCmd, NULL, NULL, 0},
{NULL, NULL, NULL, NULL, NULL, 0}
};
return TclMakeEnsemble(interp, "string", stringImplMap);
}
/*
*----------------------------------------------------------------------
*
* Tcl_SubstObjCmd --
*
* This procedure is invoked to process the "subst" Tcl command. See the
* user documentation for details on what it does. This command relies on
* Tcl_SubstObj() for its implementation.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
TclSubstOptions(
Tcl_Interp *interp,
int numOpts,
Tcl_Obj *const opts[],
int *flagPtr)
{
static const char *const substOptions[] = {
"-nobackslashes", "-nocommands", "-novariables", NULL
};
enum {
SUBST_NOBACKSLASHES, SUBST_NOCOMMANDS, SUBST_NOVARS
};
int i, flags = TCL_SUBST_ALL;
for (i = 0; i < numOpts; i++) {
int optionIndex;
if (Tcl_GetIndexFromObj(interp, opts[i], substOptions, "option", 0,
&optionIndex) != TCL_OK) {
return TCL_ERROR;
}
switch (optionIndex) {
case SUBST_NOBACKSLASHES:
flags &= ~TCL_SUBST_BACKSLASHES;
break;
case SUBST_NOCOMMANDS:
flags &= ~TCL_SUBST_COMMANDS;
break;
case SUBST_NOVARS:
flags &= ~TCL_SUBST_VARIABLES;
break;
default:
Tcl_Panic("Tcl_SubstObjCmd: bad option index to SubstOptions");
}
}
*flagPtr = flags;
return TCL_OK;
}
int
Tcl_SubstObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
return Tcl_NRCallObjProc(interp, TclNRSubstObjCmd, dummy, objc, objv);
}
int
TclNRSubstObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int flags;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv,
"?-nobackslashes? ?-nocommands? ?-novariables? string");
return TCL_ERROR;
}
if (TclSubstOptions(interp, objc-2, objv+1, &flags) != TCL_OK) {
return TCL_ERROR;
}
return Tcl_NRSubstObj(interp, objv[objc-1], flags);
}
/*
*----------------------------------------------------------------------
*
* Tcl_SwitchObjCmd --
*
* This object-based procedure is invoked to process the "switch" Tcl
* command. See the user documentation for details on what it does.
*
* Results:
* A standard Tcl object result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_SwitchObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
return Tcl_NRCallObjProc(interp, TclNRSwitchObjCmd, dummy, objc, objv);
}
int
TclNRSwitchObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
int i,j, index, mode, foundmode, splitObjs, numMatchesSaved;
int noCase, patternLength;
const char *pattern;
Tcl_Obj *stringObj, *indexVarObj, *matchVarObj;
Tcl_Obj *const *savedObjv = objv;
Tcl_RegExp regExpr = NULL;
Interp *iPtr = (Interp *) interp;
int pc = 0;
int bidx = 0; /* Index of body argument. */
Tcl_Obj *blist = NULL; /* List obj which is the body */
CmdFrame *ctxPtr; /* Copy of the topmost cmdframe, to allow us
* to mess with the line information */
/*
* If you add options that make -e and -g not unique prefixes of -exact or
* -glob, you *must* fix TclCompileSwitchCmd's option parser as well.
*/
static const char *const options[] = {
"-exact", "-glob", "-indexvar", "-matchvar", "-nocase", "-regexp",
"--", NULL
};
enum options {
OPT_EXACT, OPT_GLOB, OPT_INDEXV, OPT_MATCHV, OPT_NOCASE, OPT_REGEXP,
OPT_LAST
};
typedef int (*strCmpFn_t)(const char *, const char *);
strCmpFn_t strCmpFn = strcmp;
mode = OPT_EXACT;
foundmode = 0;
indexVarObj = NULL;
matchVarObj = NULL;
numMatchesSaved = 0;
noCase = 0;
for (i = 1; i < objc-2; i++) {
if (TclGetString(objv[i])[0] != '-') {
break;
}
if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0,
&index) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum options) index) {
/*
* General options.
*/
case OPT_LAST:
i++;
goto finishedOptions;
case OPT_NOCASE:
strCmpFn = TclUtfCasecmp;
noCase = 1;
break;
/*
* Handle the different switch mode options.
*/
default:
if (foundmode) {
/*
* Mode already set via -exact, -glob, or -regexp.
*/
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad option \"%s\": %s option already found",
TclGetString(objv[i]), options[mode]));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH",
"DOUBLEOPT", NULL);
return TCL_ERROR;
}
foundmode = 1;
mode = index;
break;
/*
* Check for TIP#75 options specifying the variables to write
* regexp information into.
*/
case OPT_INDEXV:
i++;
if (i >= objc-2) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"missing variable name argument to %s option",
"-indexvar"));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH",
"NOVAR", NULL);
return TCL_ERROR;
}
indexVarObj = objv[i];
numMatchesSaved = -1;
break;
case OPT_MATCHV:
i++;
if (i >= objc-2) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"missing variable name argument to %s option",
"-matchvar"));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH",
"NOVAR", NULL);
return TCL_ERROR;
}
matchVarObj = objv[i];
numMatchesSaved = -1;
break;
}
}
finishedOptions:
if (objc - i < 2) {
Tcl_WrongNumArgs(interp, 1, objv,
"?-option ...? string ?pattern body ...? ?default body?");
return TCL_ERROR;
}
if (indexVarObj != NULL && mode != OPT_REGEXP) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"%s option requires -regexp option", "-indexvar"));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH",
"MODERESTRICTION", NULL);
return TCL_ERROR;
}
if (matchVarObj != NULL && mode != OPT_REGEXP) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"%s option requires -regexp option", "-matchvar"));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH",
"MODERESTRICTION", NULL);
return TCL_ERROR;
}
stringObj = objv[i];
objc -= i + 1;
objv += i + 1;
bidx = i + 1; /* First after the match string. */
/*
* If all of the pattern/command pairs are lumped into a single argument,
* split them out again.
*
* TIP #280: Determine the lines the words in the list start at, based on
* the same data for the list word itself. The cmdFramePtr line
* information is manipulated directly.
*/
splitObjs = 0;
if (objc == 1) {
Tcl_Obj **listv;
blist = objv[0];
if (TclListObjGetElements(interp, objv[0], &objc, &listv) != TCL_OK){
return TCL_ERROR;
}
/*
* Ensure that the list is non-empty.
*/
if (objc < 1) {
Tcl_WrongNumArgs(interp, 1, savedObjv,
"?-option ...? string {?pattern body ...? ?default body?}");
return TCL_ERROR;
}
objv = listv;
splitObjs = 1;
}
/*
* Complain if there is an odd number of words in the list of patterns and
* bodies.
*/
if (objc % 2) {
Tcl_ResetResult(interp);
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"extra switch pattern with no body", -1));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH", "BADARM",
NULL);
/*
* Check if this can be due to a badly placed comment in the switch
* block.
*
* The following is an heuristic to detect the infamous "comment in
* switch" error: just check if a pattern begins with '#'.
*/
if (splitObjs) {
for (i=0 ; i<objc ; i+=2) {
if (TclGetString(objv[i])[0] == '#') {
Tcl_AppendToObj(Tcl_GetObjResult(interp),
", this may be due to a comment incorrectly"
" placed outside of a switch body - see the"
" \"switch\" documentation", -1);
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH",
"BADARM", "COMMENT?", NULL);
break;
}
}
}
return TCL_ERROR;
}
/*
* Complain if the last body is a continuation. Note that this check
* assumes that the list is non-empty!
*/
if (strcmp(TclGetString(objv[objc-1]), "-") == 0) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"no body specified for pattern \"%s\"",
TclGetString(objv[objc-2])));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "SWITCH", "BADARM",
"FALLTHROUGH", NULL);
return TCL_ERROR;
}
for (i = 0; i < objc; i += 2) {
/*
* See if the pattern matches the string.
*/
pattern = TclGetStringFromObj(objv[i], &patternLength);
if ((i == objc - 2) && (*pattern == 'd')
&& (strcmp(pattern, "default") == 0)) {
Tcl_Obj *emptyObj = NULL;
/*
* If either indexVarObj or matchVarObj are non-NULL, we're in
* REGEXP mode but have reached the default clause anyway. TIP#75
* specifies that we set the variables to empty lists (== empty
* objects) in that case.
*/
if (indexVarObj != NULL) {
TclNewObj(emptyObj);
if (Tcl_ObjSetVar2(interp, indexVarObj, NULL, emptyObj,
TCL_LEAVE_ERR_MSG) == NULL) {
return TCL_ERROR;
}
}
if (matchVarObj != NULL) {
if (emptyObj == NULL) {
TclNewObj(emptyObj);
}
if (Tcl_ObjSetVar2(interp, matchVarObj, NULL, emptyObj,
TCL_LEAVE_ERR_MSG) == NULL) {
return TCL_ERROR;
}
}
goto matchFound;
}
switch (mode) {
case OPT_EXACT:
if (strCmpFn(TclGetString(stringObj), pattern) == 0) {
goto matchFound;
}
break;
case OPT_GLOB:
if (Tcl_StringCaseMatch(TclGetString(stringObj),pattern,noCase)) {
goto matchFound;
}
break;
case OPT_REGEXP:
regExpr = Tcl_GetRegExpFromObj(interp, objv[i],
TCL_REG_ADVANCED | (noCase ? TCL_REG_NOCASE : 0));
if (regExpr == NULL) {
return TCL_ERROR;
} else {
int matched = Tcl_RegExpExecObj(interp, regExpr, stringObj, 0,
numMatchesSaved, 0);
if (matched < 0) {
return TCL_ERROR;
} else if (matched) {
goto matchFoundRegexp;
}
}
break;
}
}
return TCL_OK;
matchFoundRegexp:
/*
* We are operating in REGEXP mode and we need to store information about
* what we matched in some user-nominated arrays. So build the lists of
* values and indices to write here. [TIP#75]
*/
if (numMatchesSaved) {
Tcl_RegExpInfo info;
Tcl_Obj *matchesObj, *indicesObj = NULL;
Tcl_RegExpGetInfo(regExpr, &info);
if (matchVarObj != NULL) {
TclNewObj(matchesObj);
} else {
matchesObj = NULL;
}
if (indexVarObj != NULL) {
TclNewObj(indicesObj);
}
for (j=0 ; j<=info.nsubs ; j++) {
if (indexVarObj != NULL) {
Tcl_Obj *rangeObjAry[2];
if (info.matches[j].end > 0) {
rangeObjAry[0] = Tcl_NewLongObj(info.matches[j].start);
rangeObjAry[1] = Tcl_NewLongObj(info.matches[j].end-1);
} else {
TclNewIntObj(rangeObjAry[1], -1);
rangeObjAry[0] = rangeObjAry[1];
}
/*
* Never fails; the object is always clean at this point.
*/
Tcl_ListObjAppendElement(NULL, indicesObj,
Tcl_NewListObj(2, rangeObjAry));
}
if (matchVarObj != NULL) {
Tcl_Obj *substringObj;
substringObj = Tcl_GetRange(stringObj,
info.matches[j].start, info.matches[j].end-1);
/*
* Never fails; the object is always clean at this point.
*/
Tcl_ListObjAppendElement(NULL, matchesObj, substringObj);
}
}
if (indexVarObj != NULL) {
if (Tcl_ObjSetVar2(interp, indexVarObj, NULL, indicesObj,
TCL_LEAVE_ERR_MSG) == NULL) {
/*
* Careful! Check to see if we have allocated the list of
* matched strings; if so (but there was an error assigning
* the indices list) we have a potential memory leak because
* the match list has not been written to a variable. Except
* that we'll clean that up right now.
*/
if (matchesObj != NULL) {
Tcl_DecrRefCount(matchesObj);
}
return TCL_ERROR;
}
}
if (matchVarObj != NULL) {
if (Tcl_ObjSetVar2(interp, matchVarObj, NULL, matchesObj,
TCL_LEAVE_ERR_MSG) == NULL) {
/*
* Unlike above, if indicesObj is non-NULL at this point, it
* will have been written to a variable already and will hence
* not be leaked.
*/
return TCL_ERROR;
}
}
}
/*
* We've got a match. Find a body to execute, skipping bodies that are
* "-".
*/
matchFound:
ctxPtr = TclStackAlloc(interp, sizeof(CmdFrame));
*ctxPtr = *iPtr->cmdFramePtr;
if (splitObjs) {
/*
* We have to perform the GetSrc and other type dependent handling of
* the frame here because we are munging with the line numbers,
* something the other commands like if, etc. are not doing. Them are
* fine with simply passing the CmdFrame through and having the
* special handling done in 'info frame', or the bc compiler
*/
if (ctxPtr->type == TCL_LOCATION_BC) {
/*
* Type BC => ctxPtr->data.eval.path is not used.
* ctxPtr->data.tebc.codePtr is used instead.
*/
TclGetSrcInfoForPc(ctxPtr);
pc = 1;
/*
* The line information in the cmdFrame is now a copy we do not
* own.
*/
}
if (ctxPtr->type == TCL_LOCATION_SOURCE && ctxPtr->line[bidx] >= 0) {
int bline = ctxPtr->line[bidx];
ctxPtr->line = ckalloc(objc * sizeof(int));
ctxPtr->nline = objc;
TclListLines(blist, bline, objc, ctxPtr->line, objv);
} else {
/*
* This is either a dynamic code word, when all elements are
* relative to themselves, or something else less expected and
* where we have no information. The result is the same in both
* cases; tell the code to come that it doesn't know where it is,
* which triggers reversion to the old behavior.
*/
int k;
ctxPtr->line = ckalloc(objc * sizeof(int));
ctxPtr->nline = objc;
for (k=0; k < objc; k++) {
ctxPtr->line[k] = -1;
}
}
}
for (j = i + 1; ; j += 2) {
if (j >= objc) {
/*
* This shouldn't happen since we've checked that the last body is
* not a continuation...
*/
Tcl_Panic("fall-out when searching for body to match pattern");
}
if (strcmp(TclGetString(objv[j]), "-") != 0) {
break;
}
}
/*
* TIP #280: Make invoking context available to switch branch.
*/
Tcl_NRAddCallback(interp, SwitchPostProc, INT2PTR(splitObjs), ctxPtr,
INT2PTR(pc), (ClientData) pattern);
return TclNREvalObjEx(interp, objv[j], 0, ctxPtr, splitObjs ? j : bidx+j);
}
static int
SwitchPostProc(
ClientData data[], /* Data passed from Tcl_NRAddCallback above */
Tcl_Interp *interp, /* Tcl interpreter */
int result) /* Result to return*/
{
/* Unpack the preserved data */
int splitObjs = PTR2INT(data[0]);
CmdFrame *ctxPtr = data[1];
int pc = PTR2INT(data[2]);
const char *pattern = data[3];
int patternLength = strlen(pattern);
/*
* Clean up TIP 280 context information
*/
if (splitObjs) {
ckfree(ctxPtr->line);
if (pc && (ctxPtr->type == TCL_LOCATION_SOURCE)) {
/*
* Death of SrcInfo reference.
*/
Tcl_DecrRefCount(ctxPtr->data.eval.path);
}
}
/*
* Generate an error message if necessary.
*/
if (result == TCL_ERROR) {
int limit = 50;
int overflow = (patternLength > limit);
Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf(
"\n (\"%.*s%s\" arm line %d)",
(overflow ? limit : patternLength), pattern,
(overflow ? "..." : ""), Tcl_GetErrorLine(interp)));
}
TclStackFree(interp, ctxPtr);
return result;
}
/*
*----------------------------------------------------------------------
*
* Tcl_ThrowObjCmd --
*
* This procedure is invoked to process the "throw" 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_ThrowObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_Obj *options;
int len;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "type message");
return TCL_ERROR;
}
/*
* The type must be a list of at least length 1.
*/
if (Tcl_ListObjLength(interp, objv[1], &len) != TCL_OK) {
return TCL_ERROR;
} else if (len < 1) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"type must be non-empty list", -1));
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "THROW", "BADEXCEPTION",
NULL);
return TCL_ERROR;
}
/*
* Now prepare the result options dictionary. We use the list API as it is
* slightly more convenient.
*/
TclNewLiteralStringObj(options, "-code error -level 0 -errorcode");
Tcl_ListObjAppendElement(NULL, options, objv[1]);
/*
* We're ready to go. Fire things into the low-level result machinery.
*/
Tcl_SetObjResult(interp, objv[2]);
return Tcl_SetReturnOptions(interp, options);
}
/*
*----------------------------------------------------------------------
*
* Tcl_TimeObjCmd --
*
* This object-based procedure is invoked to process the "time" Tcl
* command. See the user documentation for details on what it does.
*
* Results:
* A standard Tcl object result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_TimeObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_Obj *objPtr;
Tcl_Obj *objs[4];
int i, result;
int count;
double totalMicroSec;
#ifndef TCL_WIDE_CLICKS
Tcl_Time start, stop;
#else
Tcl_WideInt start, stop;
#endif
if (objc == 2) {
count = 1;
} else if (objc == 3) {
result = TclGetIntFromObj(interp, objv[2], &count);
if (result != TCL_OK) {
return result;
}
} else {
Tcl_WrongNumArgs(interp, 1, objv, "command ?count?");
return TCL_ERROR;
}
objPtr = objv[1];
i = count;
#ifndef TCL_WIDE_CLICKS
Tcl_GetTime(&start);
#else
start = TclpGetWideClicks();
#endif
while (i-- > 0) {
result = TclEvalObjEx(interp, objPtr, 0, NULL, 0);
if (result != TCL_OK) {
return result;
}
}
#ifndef TCL_WIDE_CLICKS
Tcl_GetTime(&stop);
totalMicroSec = ((double) (stop.sec - start.sec)) * 1.0e6
+ (stop.usec - start.usec);
#else
stop = TclpGetWideClicks();
totalMicroSec = ((double) TclpWideClicksToNanoseconds(stop - start))/1.0e3;
#endif
if (count <= 1) {
/*
* Use int obj since we know time is not fractional. [Bug 1202178]
*/
objs[0] = Tcl_NewWideIntObj((count <= 0) ? 0 : (Tcl_WideInt)totalMicroSec);
} else {
objs[0] = Tcl_NewDoubleObj(totalMicroSec/count);
}
/*
* Construct the result as a list because many programs have always parsed
* as such (extracting the first element, typically).
*/
TclNewLiteralStringObj(objs[1], "microseconds");
TclNewLiteralStringObj(objs[2], "per");
TclNewLiteralStringObj(objs[3], "iteration");
Tcl_SetObjResult(interp, Tcl_NewListObj(4, objs));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* Tcl_TimeRateObjCmd --
*
* This object-based procedure is invoked to process the "timerate" Tcl
* command.
*
* This is similar to command "time", except the execution limited by
* given time (in milliseconds) instead of repetition count.
*
* Example:
* timerate {after 5} 1000; # equivalent to: time {after 5} [expr 1000/5]
*
* Results:
* A standard Tcl object result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_TimeRateObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
static double measureOverhead = 0;
/* global measure-overhead */
double overhead = -1; /* given measure-overhead */
Tcl_Obj *objPtr;
int result, i;
Tcl_Obj *calibrate = NULL, *direct = NULL;
TclWideMUInt count = 0; /* Holds repetition count */
Tcl_WideInt maxms = WIDE_MIN;
/* Maximal running time (in milliseconds) */
TclWideMUInt maxcnt = WIDE_MAX;
/* Maximal count of iterations. */
TclWideMUInt threshold = 1; /* Current threshold for check time (faster
* repeat count without time check) */
TclWideMUInt maxIterTm = 1; /* Max time of some iteration as max
* threshold, additionally avoiding divide to
* zero (i.e., never < 1) */
unsigned short factor = 50; /* Factor (4..50) limiting threshold to avoid
* growth of execution time. */
Tcl_WideInt start, middle, stop;
#ifndef TCL_WIDE_CLICKS
Tcl_Time now;
#endif /* !TCL_WIDE_CLICKS */
static const char *const options[] = {
"-direct", "-overhead", "-calibrate", "--", NULL
};
enum options {
TMRT_EV_DIRECT, TMRT_OVERHEAD, TMRT_CALIBRATE, TMRT_LAST
};
NRE_callback *rootPtr;
ByteCode *codePtr = NULL;
for (i = 1; i < objc - 1; i++) {
int index;
if (Tcl_GetIndexFromObj(NULL, objv[i], options, "option", TCL_EXACT,
&index) != TCL_OK) {
break;
}
if (index == TMRT_LAST) {
i++;
break;
}
switch (index) {
case TMRT_EV_DIRECT:
direct = objv[i];
break;
case TMRT_OVERHEAD:
if (++i >= objc - 1) {
goto usage;
}
if (Tcl_GetDoubleFromObj(interp, objv[i], &overhead) != TCL_OK) {
return TCL_ERROR;
}
break;
case TMRT_CALIBRATE:
calibrate = objv[i];
break;
}
}
if (i >= objc || i < objc - 3) {
usage:
Tcl_WrongNumArgs(interp, 1, objv,
"?-direct? ?-calibrate? ?-overhead double? "
"command ?time ?max-count??");
return TCL_ERROR;
}
objPtr = objv[i++];
if (i < objc) { /* max-time */
result = Tcl_GetWideIntFromObj(interp, objv[i++], &maxms);
if (result != TCL_OK) {
return result;
}
if (i < objc) { /* max-count*/
Tcl_WideInt v;
result = Tcl_GetWideIntFromObj(interp, objv[i], &v);
if (result != TCL_OK) {
return result;
}
maxcnt = (v > 0) ? v : 0;
}
}
/*
* If we are doing calibration.
*/
if (calibrate) {
/*
* If no time specified for the calibration.
*/
if (maxms == WIDE_MIN) {
Tcl_Obj *clobjv[6];
Tcl_WideInt maxCalTime = 5000;
double lastMeasureOverhead = measureOverhead;
clobjv[0] = objv[0];
i = 1;
if (direct) {
clobjv[i++] = direct;
}
clobjv[i++] = objPtr;
/*
* Reset last measurement overhead.
*/
measureOverhead = (double) 0;
/*
* Self-call with 100 milliseconds to warm-up, before entering the
* calibration cycle.
*/
TclNewLongObj(clobjv[i], 100);
Tcl_IncrRefCount(clobjv[i]);
result = Tcl_TimeRateObjCmd(NULL, interp, i + 1, clobjv);
Tcl_DecrRefCount(clobjv[i]);
if (result != TCL_OK) {
return result;
}
i--;
clobjv[i++] = calibrate;
clobjv[i++] = objPtr;
/*
* Set last measurement overhead to max.
*/
measureOverhead = (double) UWIDE_MAX;
/*
* Run the calibration cycle until it is more precise.
*/
maxms = -1000;
do {
lastMeasureOverhead = measureOverhead;
TclNewLongObj(clobjv[i], (int) maxms);
Tcl_IncrRefCount(clobjv[i]);
result = Tcl_TimeRateObjCmd(NULL, interp, i + 1, clobjv);
Tcl_DecrRefCount(clobjv[i]);
if (result != TCL_OK) {
return result;
}
maxCalTime += maxms;
/*
* Increase maxms for more precise calibration.
*/
maxms -= -maxms / 4;
/*
* As long as new value more as 0.05% better
*/
} while ((measureOverhead >= lastMeasureOverhead
|| measureOverhead / lastMeasureOverhead <= 0.9995)
&& maxCalTime > 0);
return result;
}
if (maxms == 0) {
/*
* Reset last measurement overhead
*/
measureOverhead = 0;
Tcl_SetObjResult(interp, Tcl_NewLongObj(0));
return TCL_OK;
}
/*
* If time is negative, make current overhead more precise.
*/
if (maxms > 0) {
/*
* Set last measurement overhead to max.
*/
measureOverhead = (double) UWIDE_MAX;
} else {
maxms = -maxms;
}
}
if (maxms == WIDE_MIN) {
maxms = 1000;
}
if (overhead == -1) {
overhead = measureOverhead;
}
/*
* Ensure that resetting of result will not smudge the further
* measurement.
*/
Tcl_ResetResult(interp);
/*
* Compile object if needed.
*/
if (!direct) {
if (TclInterpReady(interp) != TCL_OK) {
return TCL_ERROR;
}
codePtr = TclCompileObj(interp, objPtr, NULL, 0);
TclPreserveByteCode(codePtr);
}
/*
* Get start and stop time.
*/
#ifdef TCL_WIDE_CLICKS
start = middle = TclpGetWideClicks();
/*
* Time to stop execution (in wide clicks).
*/
stop = start + (maxms * 1000 / TclpWideClickInMicrosec());
#else
Tcl_GetTime(&now);
start = now.sec;
start *= 1000000;
start += now.usec;
middle = start;
/*
* Time to stop execution (in microsecs).
*/
stop = start + maxms * 1000;
#endif /* TCL_WIDE_CLICKS */
/*
* Start measurement.
*/
if (maxcnt > 0) {
while (1) {
/*
* Evaluate a single iteration.
*/
count++;
if (!direct) { /* precompiled */
rootPtr = TOP_CB(interp);
/*
* Use loop optimized TEBC call (TCL_EVAL_DISCARD_RESULT): it's a part of
* iteration, this way evaluation will be more similar to a cycle (also
* avoids extra overhead to set result to interp, etc.)
*/
((Interp *)interp)->evalFlags |= TCL_EVAL_DISCARD_RESULT;
result = TclNRExecuteByteCode(interp, codePtr);
result = TclNRRunCallbacks(interp, result, rootPtr);
} else { /* eval */
result = TclEvalObjEx(interp, objPtr, 0, NULL, 0);
}
/*
* Allow break and continue from measurement cycle (used for
* conditional stop and flow control of iterations).
*/
switch (result) {
case TCL_OK:
break;
case TCL_BREAK:
/*
* Force stop immediately.
*/
threshold = 1;
maxcnt = 0;
/* FALLTHRU */
case TCL_CONTINUE:
result = TCL_OK;
break;
default:
goto done;
}
/*
* Don't check time up to threshold.
*/
if (--threshold > 0) {
continue;
}
/*
* Check stop time reached, estimate new threshold.
*/
#ifdef TCL_WIDE_CLICKS
middle = TclpGetWideClicks();
#else
Tcl_GetTime(&now);
middle = now.sec;
middle *= 1000000;
middle += now.usec;
#endif /* TCL_WIDE_CLICKS */
if (middle >= stop || count >= maxcnt) {
break;
}
/*
* Don't calculate threshold by few iterations, because sometimes
* first iteration(s) can be too fast or slow (cached, delayed
* clean up, etc).
*/
if (count < 10) {
threshold = 1;
continue;
}
/*
* Average iteration time in microsecs.
*/
threshold = (middle - start) / count;
if (threshold > maxIterTm) {
maxIterTm = threshold;
/*
* Iterations seem to be longer.
*/
if (threshold > maxIterTm * 2) {
factor *= 2;
if (factor > 50) {
factor = 50;
}
} else {
if (factor < 50) {
factor++;
}
}
} else if (factor > 4) {
/*
* Iterations seem to be shorter.
*/
if (threshold < (maxIterTm / 2)) {
factor /= 2;
if (factor < 4) {
factor = 4;
}
} else {
factor--;
}
}
/*
* As relation between remaining time and time since last check,
* maximal some % of time (by factor), so avoid growing of the
* execution time if iterations are not consistent, e.g. was
* continuously on time).
*/
threshold = ((stop - middle) / maxIterTm) / factor + 1;
if (threshold > 100000) { /* fix for too large threshold */
threshold = 100000;
}
/*
* Consider max-count
*/
if (threshold > maxcnt - count) {
threshold = maxcnt - count;
}
}
}
{
Tcl_Obj *objarr[8], **objs = objarr;
TclWideMUInt usec, val;
int digits;
/*
* Absolute execution time in microseconds or in wide clicks.
*/
usec = (TclWideMUInt)(middle - start);
#ifdef TCL_WIDE_CLICKS
/*
* convert execution time (in wide clicks) to microsecs.
*/
usec *= TclpWideClickInMicrosec();
#endif /* TCL_WIDE_CLICKS */
if (!count) { /* no iterations - avoid divide by zero */
objs[0] = objs[2] = objs[4] = Tcl_NewWideIntObj(0);
goto retRes;
}
/*
* If not calibrating...
*/
if (!calibrate) {
/*
* Minimize influence of measurement overhead.
*/
if (overhead > 0) {
/*
* Estimate the time of overhead (microsecs).
*/
TclWideMUInt curOverhead = overhead * count;
if (usec > curOverhead) {
usec -= curOverhead;
} else {
usec = 0;
}
}
} else {
/*
* Calibration: obtaining new measurement overhead.
*/
if (measureOverhead > ((double) usec) / count) {
measureOverhead = ((double) usec) / count;
}
objs[0] = Tcl_NewDoubleObj(measureOverhead);
TclNewLiteralStringObj(objs[1], "\xC2\xB5s/#-overhead"); /* mics */
objs += 2;
}
val = usec / count; /* microsecs per iteration */
if (val >= 1000000) {
objs[0] = Tcl_NewWideIntObj(val);
} else {
if (val < 10) {
digits = 6;
} else if (val < 100) {
digits = 4;
} else if (val < 1000) {
digits = 3;
} else if (val < 10000) {
digits = 2;
} else {
digits = 1;
}
objs[0] = Tcl_ObjPrintf("%.*f", digits, ((double) usec)/count);
}
objs[2] = Tcl_NewWideIntObj(count); /* iterations */
/*
* Calculate speed as rate (count) per sec
*/
if (!usec) {
usec++; /* Avoid divide by zero. */
}
if (count < (WIDE_MAX / 1000000)) {
val = (count * 1000000) / usec;
if (val < 100000) {
if (val < 100) {
digits = 3;
} else if (val < 1000) {
digits = 2;
} else {
digits = 1;
}
objs[4] = Tcl_ObjPrintf("%.*f",
digits, ((double) (count * 1000000)) / usec);
} else {
objs[4] = Tcl_NewWideIntObj(val);
}
} else {
objs[4] = Tcl_NewWideIntObj((count / usec) * 1000000);
}
retRes:
/*
* Estimated net execution time (in millisecs).
*/
if (!calibrate) {
if (usec >= 1) {
objs[6] = Tcl_ObjPrintf("%.3f", (double)usec / 1000);
} else {
objs[6] = Tcl_NewWideIntObj(0);
}
TclNewLiteralStringObj(objs[7], "net-ms");
}
/*
* Construct the result as a list because many programs have always
* parsed as such (extracting the first element, typically).
*/
TclNewLiteralStringObj(objs[1], "\xC2\xB5s/#"); /* mics/# */
TclNewLiteralStringObj(objs[3], "#");
TclNewLiteralStringObj(objs[5], "#/sec");
Tcl_SetObjResult(interp, Tcl_NewListObj(8, objarr));
}
done:
if (codePtr != NULL) {
TclReleaseByteCode(codePtr);
}
return result;
}
/*
*----------------------------------------------------------------------
*
* Tcl_TryObjCmd, TclNRTryObjCmd --
*
* This procedure is invoked to process the "try" Tcl command. See the
* user documentation (or TIP #329) for details on what it does.
*
* Results:
* A standard Tcl object result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_TryObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
return Tcl_NRCallObjProc(interp, TclNRTryObjCmd, dummy, objc, objv);
}
int
TclNRTryObjCmd(
ClientData clientData, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
Tcl_Obj *bodyObj, *handlersObj, *finallyObj = NULL;
int i, bodyShared, haveHandlers, dummy, code;
static const char *const handlerNames[] = {
"finally", "on", "trap", NULL
};
enum Handlers {
TryFinally, TryOn, TryTrap
};
/*
* Parse the arguments. The handlers are passed to subsequent callbacks as
* a Tcl_Obj list of the 5-tuples like (type, returnCode, errorCodePrefix,
* bindVariables, script), and the finally script is just passed as it is.
*/
if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv,
"body ?handler ...? ?finally script?");
return TCL_ERROR;
}
bodyObj = objv[1];
TclNewObj(handlersObj);
bodyShared = 0;
haveHandlers = 0;
for (i=2 ; i<objc ; i++) {
int type;
Tcl_Obj *info[5];
if (Tcl_GetIndexFromObj(interp, objv[i], handlerNames, "handler type",
0, &type) != TCL_OK) {
Tcl_DecrRefCount(handlersObj);
return TCL_ERROR;
}
switch ((enum Handlers) type) {
case TryFinally: /* finally script */
if (i < objc-2) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"finally clause must be last", -1));
Tcl_DecrRefCount(handlersObj);
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRY", "FINALLY",
"NONTERMINAL", NULL);
return TCL_ERROR;
} else if (i == objc-1) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"wrong # args to finally clause: must be"
" \"... finally script\"", -1));
Tcl_DecrRefCount(handlersObj);
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRY", "FINALLY",
"ARGUMENT", NULL);
return TCL_ERROR;
}
finallyObj = objv[++i];
break;
case TryOn: /* on code variableList script */
if (i > objc-4) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"wrong # args to on clause: must be \"... on code"
" variableList script\"", -1));
Tcl_DecrRefCount(handlersObj);
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRY", "ON",
"ARGUMENT", NULL);
return TCL_ERROR;
}
if (TclGetCompletionCodeFromObj(interp, objv[i+1],
&code) != TCL_OK) {
Tcl_DecrRefCount(handlersObj);
return TCL_ERROR;
}
info[2] = NULL;
goto commonHandler;
case TryTrap: /* trap pattern variableList script */
if (i > objc-4) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"wrong # args to trap clause: "
"must be \"... trap pattern variableList script\"",
-1));
Tcl_DecrRefCount(handlersObj);
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRY", "TRAP",
"ARGUMENT", NULL);
return TCL_ERROR;
}
code = 1;
if (Tcl_ListObjLength(NULL, objv[i+1], &dummy) != TCL_OK) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad prefix '%s': must be a list",
Tcl_GetString(objv[i+1])));
Tcl_DecrRefCount(handlersObj);
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRY", "TRAP",
"EXNFORMAT", NULL);
return TCL_ERROR;
}
info[2] = objv[i+1];
commonHandler:
if (Tcl_ListObjLength(interp, objv[i+2], &dummy) != TCL_OK) {
Tcl_DecrRefCount(handlersObj);
return TCL_ERROR;
}
info[0] = objv[i]; /* type */
TclNewIntObj(info[1], code); /* returnCode */
if (info[2] == NULL) { /* errorCodePrefix */
TclNewObj(info[2]);
}
info[3] = objv[i+2]; /* bindVariables */
info[4] = objv[i+3]; /* script */
bodyShared = !strcmp(TclGetString(objv[i+3]), "-");
Tcl_ListObjAppendElement(NULL, handlersObj,
Tcl_NewListObj(5, info));
haveHandlers = 1;
i += 3;
break;
}
}
if (bodyShared) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"last non-finally clause must not have a body of \"-\"", -1));
Tcl_DecrRefCount(handlersObj);
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRY", "BADFALLTHROUGH",
NULL);
return TCL_ERROR;
}
if (!haveHandlers) {
Tcl_DecrRefCount(handlersObj);
handlersObj = NULL;
}
/*
* Execute the body.
*/
Tcl_NRAddCallback(interp, TryPostBody, handlersObj, finallyObj,
(ClientData)objv, INT2PTR(objc));
return TclNREvalObjEx(interp, bodyObj, 0,
((Interp *) interp)->cmdFramePtr, 1);
}
/*
*----------------------------------------------------------------------
*
* During --
*
* This helper function patches together the updates to the interpreter's
* return options that are needed when things fail during the processing
* of a handler or finally script for the [try] command.
*
* Returns:
* The new option dictionary.
*
*----------------------------------------------------------------------
*/
static inline Tcl_Obj *
During(
Tcl_Interp *interp,
int resultCode, /* The result code from the just-evaluated
* script. */
Tcl_Obj *oldOptions, /* The old option dictionary. */
Tcl_Obj *errorInfo) /* An object to append to the errorinfo and
* release, or NULL if nothing is to be added.
* Designed to be used with Tcl_ObjPrintf. */
{
Tcl_Obj *during, *options;
if (errorInfo != NULL) {
Tcl_AppendObjToErrorInfo(interp, errorInfo);
}
options = Tcl_GetReturnOptions(interp, resultCode);
TclNewLiteralStringObj(during, "-during");
Tcl_IncrRefCount(during);
Tcl_DictObjPut(interp, options, during, oldOptions);
Tcl_DecrRefCount(during);
Tcl_IncrRefCount(options);
Tcl_DecrRefCount(oldOptions);
return options;
}
/*
*----------------------------------------------------------------------
*
* TryPostBody --
*
* Callback to handle the outcome of the execution of the body of a 'try'
* command.
*
*----------------------------------------------------------------------
*/
static int
TryPostBody(
ClientData data[],
Tcl_Interp *interp,
int result)
{
Tcl_Obj *resultObj, *options, *handlersObj, *finallyObj, *cmdObj, **objv;
int i, dummy, code, objc;
int numHandlers = 0;
handlersObj = data[0];
finallyObj = data[1];
objv = data[2];
objc = PTR2INT(data[3]);
cmdObj = objv[0];
/*
* Check for limits/rewinding, which override normal trapping behaviour.
*/
if (((Interp*) interp)->execEnvPtr->rewind || Tcl_LimitExceeded(interp)) {
Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf(
"\n (\"%s\" body line %d)", TclGetString(cmdObj),
Tcl_GetErrorLine(interp)));
if (handlersObj != NULL) {
Tcl_DecrRefCount(handlersObj);
}
return TCL_ERROR;
}
/*
* Basic processing of the outcome of the script, including adding of
* errorinfo trace.
*/
if (result == TCL_ERROR) {
Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf(
"\n (\"%s\" body line %d)", TclGetString(cmdObj),
Tcl_GetErrorLine(interp)));
}
resultObj = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(resultObj);
options = Tcl_GetReturnOptions(interp, result);
Tcl_IncrRefCount(options);
Tcl_ResetResult(interp);
/*
* Handle the results.
*/
if (handlersObj != NULL) {
int found = 0;
Tcl_Obj **handlers, **info;
Tcl_ListObjGetElements(NULL, handlersObj, &numHandlers, &handlers);
for (i=0 ; i<numHandlers ; i++) {
Tcl_Obj *handlerBodyObj;
Tcl_ListObjGetElements(NULL, handlers[i], &dummy, &info);
if (!found) {
Tcl_GetIntFromObj(NULL, info[1], &code);
if (code != result) {
continue;
}
/*
* When processing an error, we must also perform list-prefix
* matching of the errorcode list. However, if this was an
* 'on' handler, the list that we are matching against will be
* empty.
*/
if (code == TCL_ERROR) {
Tcl_Obj *errorCodeName, *errcode, **bits1, **bits2;
int len1, len2, j;
TclNewLiteralStringObj(errorCodeName, "-errorcode");
Tcl_DictObjGet(NULL, options, errorCodeName, &errcode);
Tcl_DecrRefCount(errorCodeName);
Tcl_ListObjGetElements(NULL, info[2], &len1, &bits1);
if (Tcl_ListObjGetElements(NULL, errcode, &len2,
&bits2) != TCL_OK) {
continue;
}
if (len2 < len1) {
continue;
}
for (j=0 ; j<len1 ; j++) {
if (strcmp(TclGetString(bits1[j]),
TclGetString(bits2[j])) != 0) {
/*
* Really want 'continue outerloop;', but C does
* not give us that.
*/
goto didNotMatch;
}
}
}
found = 1;
}
/*
* Now we need to scan forward over "-" bodies. Note that we've
* already checked that the last body is not a "-", so this search
* will terminate successfully.
*/
if (!strcmp(TclGetString(info[4]), "-")) {
continue;
}
/*
* Bind the variables. We already know this is a list of variable
* names, but it might be empty.
*/
Tcl_ResetResult(interp);
result = TCL_ERROR;
Tcl_ListObjLength(NULL, info[3], &dummy);
if (dummy > 0) {
Tcl_Obj *varName;
Tcl_ListObjIndex(NULL, info[3], 0, &varName);
if (Tcl_ObjSetVar2(interp, varName, NULL, resultObj,
TCL_LEAVE_ERR_MSG) == NULL) {
Tcl_DecrRefCount(resultObj);
goto handlerFailed;
}
Tcl_DecrRefCount(resultObj);
if (dummy > 1) {
Tcl_ListObjIndex(NULL, info[3], 1, &varName);
if (Tcl_ObjSetVar2(interp, varName, NULL, options,
TCL_LEAVE_ERR_MSG) == NULL) {
goto handlerFailed;
}
}
} else {
/*
* Dispose of the result to prevent a memleak. [Bug 2910044]
*/
Tcl_DecrRefCount(resultObj);
}
/*
* Evaluate the handler body and process the outcome. Note that we
* need to keep the kind of handler for debugging purposes, and in
* any case anything we want from info[] must be extracted right
* now because the info[] array is about to become invalid. There
* is very little refcount handling here however, since we know
* that the objects that we still want to refer to now were input
* arguments to [try] and so are still on the Tcl value stack.
*/
handlerBodyObj = info[4];
Tcl_NRAddCallback(interp, TryPostHandler, objv, options, info[0],
INT2PTR((finallyObj == NULL) ? 0 : objc - 1));
Tcl_DecrRefCount(handlersObj);
return TclNREvalObjEx(interp, handlerBodyObj, 0,
((Interp *) interp)->cmdFramePtr, 4*i + 5);
handlerFailed:
resultObj = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(resultObj);
options = During(interp, result, options, NULL);
break;
didNotMatch:
continue;
}
/*
* No handler matched; get rid of the list of handlers.
*/
Tcl_DecrRefCount(handlersObj);
}
/*
* Process the finally clause.
*/
if (finallyObj != NULL) {
Tcl_NRAddCallback(interp, TryPostFinal, resultObj, options, cmdObj,
NULL);
return TclNREvalObjEx(interp, finallyObj, 0,
((Interp *) interp)->cmdFramePtr, objc - 1);
}
/*
* Install the correct result/options into the interpreter and clean up
* any temporary storage.
*/
result = Tcl_SetReturnOptions(interp, options);
Tcl_DecrRefCount(options);
Tcl_SetObjResult(interp, resultObj);
Tcl_DecrRefCount(resultObj);
return result;
}
/*
*----------------------------------------------------------------------
*
* TryPostHandler --
*
* Callback to handle the outcome of the execution of a handler of a
* 'try' command.
*
*----------------------------------------------------------------------
*/
static int
TryPostHandler(
ClientData data[],
Tcl_Interp *interp,
int result)
{
Tcl_Obj *resultObj, *cmdObj, *options, *handlerKindObj, **objv;
Tcl_Obj *finallyObj;
int finallyIndex;
objv = data[0];
options = data[1];
handlerKindObj = data[2];
finallyIndex = PTR2INT(data[3]);
cmdObj = objv[0];
finallyObj = finallyIndex ? objv[finallyIndex] : 0;
/*
* Check for limits/rewinding, which override normal trapping behaviour.
*/
if (((Interp*) interp)->execEnvPtr->rewind || Tcl_LimitExceeded(interp)) {
options = During(interp, result, options, Tcl_ObjPrintf(
"\n (\"%s ... %s\" handler line %d)",
TclGetString(cmdObj), TclGetString(handlerKindObj),
Tcl_GetErrorLine(interp)));
Tcl_DecrRefCount(options);
return TCL_ERROR;
}
/*
* The handler result completely substitutes for the result of the body.
*/
resultObj = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(resultObj);
if (result == TCL_ERROR) {
options = During(interp, result, options, Tcl_ObjPrintf(
"\n (\"%s ... %s\" handler line %d)",
TclGetString(cmdObj), TclGetString(handlerKindObj),
Tcl_GetErrorLine(interp)));
} else {
Tcl_DecrRefCount(options);
options = Tcl_GetReturnOptions(interp, result);
Tcl_IncrRefCount(options);
}
/*
* Process the finally clause if it is present.
*/
if (finallyObj != NULL) {
Interp *iPtr = (Interp *) interp;
Tcl_NRAddCallback(interp, TryPostFinal, resultObj, options, cmdObj,
NULL);
/* The 'finally' script is always the last argument word. */
return TclNREvalObjEx(interp, finallyObj, 0, iPtr->cmdFramePtr,
finallyIndex);
}
/*
* Install the correct result/options into the interpreter and clean up
* any temporary storage.
*/
result = Tcl_SetReturnOptions(interp, options);
Tcl_DecrRefCount(options);
Tcl_SetObjResult(interp, resultObj);
Tcl_DecrRefCount(resultObj);
return result;
}
/*
*----------------------------------------------------------------------
*
* TryPostFinal --
*
* Callback to handle the outcome of the execution of the finally script
* of a 'try' command.
*
*----------------------------------------------------------------------
*/
static int
TryPostFinal(
ClientData data[],
Tcl_Interp *interp,
int result)
{
Tcl_Obj *resultObj, *options, *cmdObj;
resultObj = data[0];
options = data[1];
cmdObj = data[2];
/*
* If the result wasn't OK, we need to adjust the result options.
*/
if (result != TCL_OK) {
Tcl_DecrRefCount(resultObj);
resultObj = NULL;
if (result == TCL_ERROR) {
options = During(interp, result, options, Tcl_ObjPrintf(
"\n (\"%s ... finally\" body line %d)",
TclGetString(cmdObj), Tcl_GetErrorLine(interp)));
} else {
Tcl_Obj *origOptions = options;
options = Tcl_GetReturnOptions(interp, result);
Tcl_IncrRefCount(options);
Tcl_DecrRefCount(origOptions);
}
}
/*
* Install the correct result/options into the interpreter and clean up
* any temporary storage.
*/
result = Tcl_SetReturnOptions(interp, options);
Tcl_DecrRefCount(options);
if (resultObj != NULL) {
Tcl_SetObjResult(interp, resultObj);
Tcl_DecrRefCount(resultObj);
}
return result;
}
/*
*----------------------------------------------------------------------
*
* Tcl_WhileObjCmd --
*
* This procedure is invoked to process the "while" Tcl command. See the
* user documentation for details on what it does.
*
* With the bytecode compiler, this procedure is only called when a
* command name is computed at runtime, and is "while" or the name to
* which "while" was renamed: e.g., "set z while; $z {$i<100} {}"
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
int
Tcl_WhileObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
return Tcl_NRCallObjProc(interp, TclNRWhileObjCmd, dummy, objc, objv);
}
int
TclNRWhileObjCmd(
ClientData dummy, /* Not used. */
Tcl_Interp *interp, /* Current interpreter. */
int objc, /* Number of arguments. */
Tcl_Obj *const objv[]) /* Argument objects. */
{
ForIterData *iterPtr;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "test command");
return TCL_ERROR;
}
/*
* We reuse [for]'s callback, passing a NULL for the 'next' script.
*/
TclSmallAllocEx(interp, sizeof(ForIterData), iterPtr);
iterPtr->cond = objv[1];
iterPtr->body = objv[2];
iterPtr->next = NULL;
iterPtr->msg = "\n (\"while\" body line %d)";
iterPtr->word = 2;
TclNRAddCallback(interp, TclNRForIterCallback, iterPtr, NULL,
NULL, NULL);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TclListLines --
*
* ???
*
* Results:
* Filled in array of line numbers?
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
TclListLines(
Tcl_Obj *listObj, /* Pointer to obj holding a string with list
* structure. Assumed to be valid. Assumed to
* contain n elements. */
int line, /* Line the list as a whole starts on. */
int n, /* #elements in lines */
int *lines, /* Array of line numbers, to fill. */
Tcl_Obj *const *elems) /* The list elems as Tcl_Obj*, in need of
* derived continuation data */
{
const char *listStr = Tcl_GetString(listObj);
const char *listHead = listStr;
int i, length = strlen(listStr);
const char *element = NULL, *next = NULL;
ContLineLoc *clLocPtr = TclContinuationsGet(listObj);
int *clNext = (clLocPtr ? &clLocPtr->loc[0] : NULL);
for (i = 0; i < n; i++) {
TclFindElement(NULL, listStr, length, &element, &next, NULL, NULL);
TclAdvanceLines(&line, listStr, element);
/* Leading whitespace */
TclAdvanceContinuations(&line, &clNext, element - listHead);
if (elems && clNext) {
TclContinuationsEnterDerived(elems[i], element-listHead, clNext);
}
lines[i] = line;
length -= (next - listStr);
TclAdvanceLines(&line, element, next);
/* Element */
listStr = next;
if (*element == 0) {
/* ASSERT i == n */
break;
}
}
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/