1387 lines
38 KiB
C
1387 lines
38 KiB
C
/*
|
||
* tclParse.c --
|
||
*
|
||
* This file contains a collection of procedures that are used
|
||
* to parse Tcl commands or parts of commands (like quoted
|
||
* strings or nested sub-commands).
|
||
*
|
||
* Copyright (c) 1987-1993 The Regents of the University of California.
|
||
* Copyright (c) 1994-1996 Sun Microsystems, Inc.
|
||
*
|
||
* See the file "license.terms" for information on usage and redistribution
|
||
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
*
|
||
* SCCS: @(#) tclParse.c 1.50 96/03/02 14:46:55
|
||
*/
|
||
|
||
#include "tclInt.h"
|
||
#include "tclPort.h"
|
||
|
||
/*
|
||
* The following table assigns a type to each character. Only types
|
||
* meaningful to Tcl parsing are represented here. The table is
|
||
* designed to be referenced with either signed or unsigned characters,
|
||
* so it has 384 entries. The first 128 entries correspond to negative
|
||
* character values, the next 256 correspond to positive character
|
||
* values. The last 128 entries are identical to the first 128. The
|
||
* table is always indexed with a 128-byte offset (the 128th entry
|
||
* corresponds to a 0 character value).
|
||
*/
|
||
|
||
char tclTypeTable[] = {
|
||
/*
|
||
* Negative character values, from -128 to -1:
|
||
*/
|
||
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
|
||
/*
|
||
* Positive character values, from 0-127:
|
||
*/
|
||
|
||
TCL_COMMAND_END, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_SPACE, TCL_COMMAND_END, TCL_SPACE,
|
||
TCL_SPACE, TCL_SPACE, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_SPACE, TCL_NORMAL, TCL_QUOTE, TCL_NORMAL,
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||
TCL_DOLLAR, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_COMMAND_END,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_OPEN_BRACKET,
|
||
TCL_BACKSLASH, TCL_COMMAND_END, TCL_NORMAL, TCL_NORMAL,
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||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_OPEN_BRACE,
|
||
TCL_NORMAL, TCL_CLOSE_BRACE, TCL_NORMAL, TCL_NORMAL,
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||
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/*
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* Large unsigned character values, from 128-255:
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||
*/
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||
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TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
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TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
|
||
TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL,
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};
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/*
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* Function prototypes for procedures local to this file:
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||
*/
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static char * QuoteEnd _ANSI_ARGS_((char *string, int term));
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||
static char * ScriptEnd _ANSI_ARGS_((char *p, int nested));
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||
static char * VarNameEnd _ANSI_ARGS_((char *string));
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||
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/*
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*----------------------------------------------------------------------
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||
*
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||
* Tcl_Backslash --
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||
*
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* Figure out how to handle a backslash sequence.
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*
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* Results:
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||
* The return value is the character that should be substituted
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||
* in place of the backslash sequence that starts at src. If
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||
* readPtr isn't NULL then it is filled in with a count of the
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* number of characters in the backslash sequence.
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*
|
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* Side effects:
|
||
* None.
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||
*
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||
*----------------------------------------------------------------------
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||
*/
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||
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char
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Tcl_Backslash(src, readPtr)
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char *src; /* Points to the backslash character of
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* a backslash sequence. */
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int *readPtr; /* Fill in with number of characters read
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* from src, unless NULL. */
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{
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register char *p = src+1;
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char result;
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||
int count;
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||
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count = 2;
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switch (*p) {
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case 'a':
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result = 0x7; /* Don't say '\a' here, since some compilers */
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||
break; /* don't support it. */
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||
case 'b':
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result = '\b';
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break;
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case 'f':
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result = '\f';
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break;
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||
case 'n':
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result = '\n';
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break;
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case 'r':
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result = '\r';
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break;
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case 't':
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result = '\t';
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break;
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case 'v':
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result = '\v';
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break;
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||
case 'x':
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if (isxdigit(UCHAR(p[1]))) {
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||
char *end;
|
||
|
||
result = (char) strtoul(p+1, &end, 16);
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count = end - src;
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} else {
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count = 2;
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||
result = 'x';
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||
}
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break;
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case '\n':
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do {
|
||
p++;
|
||
} while ((*p == ' ') || (*p == '\t'));
|
||
result = ' ';
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||
count = p - src;
|
||
break;
|
||
case 0:
|
||
result = '\\';
|
||
count = 1;
|
||
break;
|
||
default:
|
||
if (isdigit(UCHAR(*p))) {
|
||
result = (char)(*p - '0');
|
||
p++;
|
||
if (!isdigit(UCHAR(*p))) {
|
||
break;
|
||
}
|
||
count = 3;
|
||
result = (char)((result << 3) + (*p - '0'));
|
||
p++;
|
||
if (!isdigit(UCHAR(*p))) {
|
||
break;
|
||
}
|
||
count = 4;
|
||
result = (char)((result << 3) + (*p - '0'));
|
||
break;
|
||
}
|
||
result = *p;
|
||
count = 2;
|
||
break;
|
||
}
|
||
|
||
if (readPtr != NULL) {
|
||
*readPtr = count;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TclParseQuotes --
|
||
*
|
||
* This procedure parses a double-quoted string such as a
|
||
* quoted Tcl command argument or a quoted value in a Tcl
|
||
* expression. This procedure is also used to parse array
|
||
* element names within parentheses, or anything else that
|
||
* needs all the substitutions that happen in quotes.
|
||
*
|
||
* Results:
|
||
* The return value is a standard Tcl result, which is
|
||
* TCL_OK unless there was an error while parsing the
|
||
* quoted string. If an error occurs then interp->result
|
||
* contains a standard error message. *TermPtr is filled
|
||
* in with the address of the character just after the
|
||
* last one successfully processed; this is usually the
|
||
* character just after the matching close-quote. The
|
||
* fully-substituted contents of the quotes are stored in
|
||
* standard fashion in *pvPtr, null-terminated with
|
||
* pvPtr->next pointing to the terminating null character.
|
||
*
|
||
* Side effects:
|
||
* The buffer space in pvPtr may be enlarged by calling its
|
||
* expandProc.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TclParseQuotes(interp, string, termChar, flags, termPtr, pvPtr)
|
||
Tcl_Interp *interp; /* Interpreter to use for nested command
|
||
* evaluations and error messages. */
|
||
char *string; /* Character just after opening double-
|
||
* quote. */
|
||
int termChar; /* Character that terminates "quoted" string
|
||
* (usually double-quote, but sometimes
|
||
* right-paren or something else). */
|
||
int flags; /* Flags to pass to nested Tcl_Eval calls. */
|
||
char **termPtr; /* Store address of terminating character
|
||
* here. */
|
||
ParseValue *pvPtr; /* Information about where to place
|
||
* fully-substituted result of parse. */
|
||
{
|
||
register char *src, *dst, c;
|
||
|
||
src = string;
|
||
dst = pvPtr->next;
|
||
|
||
while (1) {
|
||
if (dst == pvPtr->end) {
|
||
/*
|
||
* Target buffer space is about to run out. Make more space.
|
||
*/
|
||
|
||
pvPtr->next = dst;
|
||
(*pvPtr->expandProc)(pvPtr, 1);
|
||
dst = pvPtr->next;
|
||
}
|
||
|
||
c = *src;
|
||
src++;
|
||
if (c == termChar) {
|
||
*dst = '\0';
|
||
pvPtr->next = dst;
|
||
*termPtr = src;
|
||
return TCL_OK;
|
||
} else if (CHAR_TYPE(c) == TCL_NORMAL) {
|
||
copy:
|
||
*dst = c;
|
||
dst++;
|
||
continue;
|
||
} else if (c == '$') {
|
||
int length;
|
||
char *value;
|
||
|
||
value = Tcl_ParseVar(interp, src-1, termPtr);
|
||
if (value == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
src = *termPtr;
|
||
length = strlen(value);
|
||
if ((pvPtr->end - dst) <= length) {
|
||
pvPtr->next = dst;
|
||
(*pvPtr->expandProc)(pvPtr, length);
|
||
dst = pvPtr->next;
|
||
}
|
||
strcpy(dst, value);
|
||
dst += length;
|
||
continue;
|
||
} else if (c == '[') {
|
||
int result;
|
||
|
||
pvPtr->next = dst;
|
||
result = TclParseNestedCmd(interp, src, flags, termPtr, pvPtr);
|
||
if (result != TCL_OK) {
|
||
return result;
|
||
}
|
||
src = *termPtr;
|
||
dst = pvPtr->next;
|
||
continue;
|
||
} else if (c == '\\') {
|
||
int numRead;
|
||
|
||
src--;
|
||
*dst = Tcl_Backslash(src, &numRead);
|
||
dst++;
|
||
src += numRead;
|
||
continue;
|
||
} else if (c == '\0') {
|
||
Tcl_ResetResult(interp);
|
||
sprintf(interp->result, "missing %c", termChar);
|
||
*termPtr = string-1;
|
||
return TCL_ERROR;
|
||
} else {
|
||
goto copy;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TclParseNestedCmd --
|
||
*
|
||
* This procedure parses a nested Tcl command between
|
||
* brackets, returning the result of the command.
|
||
*
|
||
* Results:
|
||
* The return value is a standard Tcl result, which is
|
||
* TCL_OK unless there was an error while executing the
|
||
* nested command. If an error occurs then interp->result
|
||
* contains a standard error message. *TermPtr is filled
|
||
* in with the address of the character just after the
|
||
* last one processed; this is usually the character just
|
||
* after the matching close-bracket, or the null character
|
||
* at the end of the string if the close-bracket was missing
|
||
* (a missing close bracket is an error). The result returned
|
||
* by the command is stored in standard fashion in *pvPtr,
|
||
* null-terminated, with pvPtr->next pointing to the null
|
||
* character.
|
||
*
|
||
* Side effects:
|
||
* The storage space at *pvPtr may be expanded.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TclParseNestedCmd(interp, string, flags, termPtr, pvPtr)
|
||
Tcl_Interp *interp; /* Interpreter to use for nested command
|
||
* evaluations and error messages. */
|
||
char *string; /* Character just after opening bracket. */
|
||
int flags; /* Flags to pass to nested Tcl_Eval. */
|
||
char **termPtr; /* Store address of terminating character
|
||
* here. */
|
||
register ParseValue *pvPtr; /* Information about where to place
|
||
* result of command. */
|
||
{
|
||
int result, length, shortfall;
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
iPtr->evalFlags = flags | TCL_BRACKET_TERM;
|
||
result = Tcl_Eval(interp, string);
|
||
*termPtr = iPtr->termPtr;
|
||
if (result != TCL_OK) {
|
||
/*
|
||
* The increment below results in slightly cleaner message in
|
||
* the errorInfo variable (the close-bracket will appear).
|
||
*/
|
||
|
||
if (**termPtr == ']') {
|
||
*termPtr += 1;
|
||
}
|
||
return result;
|
||
}
|
||
(*termPtr) += 1;
|
||
length = strlen(iPtr->result);
|
||
shortfall = length + 1 - (pvPtr->end - pvPtr->next);
|
||
if (shortfall > 0) {
|
||
(*pvPtr->expandProc)(pvPtr, shortfall);
|
||
}
|
||
strcpy(pvPtr->next, iPtr->result);
|
||
pvPtr->next += length;
|
||
Tcl_FreeResult(iPtr);
|
||
iPtr->result = iPtr->resultSpace;
|
||
iPtr->resultSpace[0] = '\0';
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TclParseBraces --
|
||
*
|
||
* This procedure scans the information between matching
|
||
* curly braces.
|
||
*
|
||
* Results:
|
||
* The return value is a standard Tcl result, which is
|
||
* TCL_OK unless there was an error while parsing string.
|
||
* If an error occurs then interp->result contains a
|
||
* standard error message. *TermPtr is filled
|
||
* in with the address of the character just after the
|
||
* last one successfully processed; this is usually the
|
||
* character just after the matching close-brace. The
|
||
* information between curly braces is stored in standard
|
||
* fashion in *pvPtr, null-terminated with pvPtr->next
|
||
* pointing to the terminating null character.
|
||
*
|
||
* Side effects:
|
||
* The storage space at *pvPtr may be expanded.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TclParseBraces(interp, string, termPtr, pvPtr)
|
||
Tcl_Interp *interp; /* Interpreter to use for nested command
|
||
* evaluations and error messages. */
|
||
char *string; /* Character just after opening bracket. */
|
||
char **termPtr; /* Store address of terminating character
|
||
* here. */
|
||
register ParseValue *pvPtr; /* Information about where to place
|
||
* result of command. */
|
||
{
|
||
int level;
|
||
register char *src, *dst, *end;
|
||
register char c;
|
||
|
||
src = string;
|
||
dst = pvPtr->next;
|
||
end = pvPtr->end;
|
||
level = 1;
|
||
|
||
/*
|
||
* Copy the characters one at a time to the result area, stopping
|
||
* when the matching close-brace is found.
|
||
*/
|
||
|
||
while (1) {
|
||
c = *src;
|
||
src++;
|
||
if (dst == end) {
|
||
pvPtr->next = dst;
|
||
(*pvPtr->expandProc)(pvPtr, 20);
|
||
dst = pvPtr->next;
|
||
end = pvPtr->end;
|
||
}
|
||
*dst = c;
|
||
dst++;
|
||
if (CHAR_TYPE(c) == TCL_NORMAL) {
|
||
continue;
|
||
} else if (c == '{') {
|
||
level++;
|
||
} else if (c == '}') {
|
||
level--;
|
||
if (level == 0) {
|
||
dst--; /* Don't copy the last close brace. */
|
||
break;
|
||
}
|
||
} else if (c == '\\') {
|
||
int count;
|
||
|
||
/*
|
||
* Must always squish out backslash-newlines, even when in
|
||
* braces. This is needed so that this sequence can appear
|
||
* anywhere in a command, such as the middle of an expression.
|
||
*/
|
||
|
||
if (*src == '\n') {
|
||
dst[-1] = Tcl_Backslash(src-1, &count);
|
||
src += count - 1;
|
||
} else {
|
||
(void) Tcl_Backslash(src-1, &count);
|
||
while (count > 1) {
|
||
if (dst == end) {
|
||
pvPtr->next = dst;
|
||
(*pvPtr->expandProc)(pvPtr, 20);
|
||
dst = pvPtr->next;
|
||
end = pvPtr->end;
|
||
}
|
||
*dst = *src;
|
||
dst++;
|
||
src++;
|
||
count--;
|
||
}
|
||
}
|
||
} else if (c == '\0') {
|
||
Tcl_SetResult(interp, "missing close-brace", TCL_STATIC);
|
||
*termPtr = string-1;
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
*dst = '\0';
|
||
pvPtr->next = dst;
|
||
*termPtr = src;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TclParseWords --
|
||
*
|
||
* This procedure parses one or more words from a command
|
||
* string and creates argv-style pointers to fully-substituted
|
||
* copies of those words.
|
||
*
|
||
* Results:
|
||
* The return value is a standard Tcl result.
|
||
*
|
||
* *argcPtr is modified to hold a count of the number of words
|
||
* successfully parsed, which may be 0. At most maxWords words
|
||
* will be parsed. If 0 <= *argcPtr < maxWords then it
|
||
* means that a command separator was seen. If *argcPtr
|
||
* is maxWords then it means that a command separator was
|
||
* not seen yet.
|
||
*
|
||
* *TermPtr is filled in with the address of the character
|
||
* just after the last one successfully processed in the
|
||
* last word. This is either the command terminator (if
|
||
* *argcPtr < maxWords), the character just after the last
|
||
* one in a word (if *argcPtr is maxWords), or the vicinity
|
||
* of an error (if the result is not TCL_OK).
|
||
*
|
||
* The pointers at *argv are filled in with pointers to the
|
||
* fully-substituted words, and the actual contents of the
|
||
* words are copied to the buffer at pvPtr.
|
||
*
|
||
* If an error occurrs then an error message is left in
|
||
* interp->result and the information at *argv, *argcPtr,
|
||
* and *pvPtr may be incomplete.
|
||
*
|
||
* Side effects:
|
||
* The buffer space in pvPtr may be enlarged by calling its
|
||
* expandProc.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TclParseWords(interp, string, flags, maxWords, termPtr, argcPtr, argv, pvPtr)
|
||
Tcl_Interp *interp; /* Interpreter to use for nested command
|
||
* evaluations and error messages. */
|
||
char *string; /* First character of word. */
|
||
int flags; /* Flags to control parsing (same values as
|
||
* passed to Tcl_Eval). */
|
||
int maxWords; /* Maximum number of words to parse. */
|
||
char **termPtr; /* Store address of terminating character
|
||
* here. */
|
||
int *argcPtr; /* Filled in with actual number of words
|
||
* parsed. */
|
||
char **argv; /* Store addresses of individual words here. */
|
||
register ParseValue *pvPtr; /* Information about where to place
|
||
* fully-substituted word. */
|
||
{
|
||
register char *src, *dst;
|
||
register char c;
|
||
int type, result, argc;
|
||
char *oldBuffer; /* Used to detect when pvPtr's buffer gets
|
||
* reallocated, so we can adjust all of the
|
||
* argv pointers. */
|
||
|
||
src = string;
|
||
oldBuffer = pvPtr->buffer;
|
||
dst = pvPtr->next;
|
||
for (argc = 0; argc < maxWords; argc++) {
|
||
argv[argc] = dst;
|
||
|
||
/*
|
||
* Skip leading space.
|
||
*/
|
||
|
||
skipSpace:
|
||
c = *src;
|
||
type = CHAR_TYPE(c);
|
||
while (type == TCL_SPACE) {
|
||
src++;
|
||
c = *src;
|
||
type = CHAR_TYPE(c);
|
||
}
|
||
|
||
/*
|
||
* Handle the normal case (i.e. no leading double-quote or brace).
|
||
*/
|
||
|
||
if (type == TCL_NORMAL) {
|
||
normalArg:
|
||
while (1) {
|
||
if (dst == pvPtr->end) {
|
||
/*
|
||
* Target buffer space is about to run out. Make
|
||
* more space.
|
||
*/
|
||
|
||
pvPtr->next = dst;
|
||
(*pvPtr->expandProc)(pvPtr, 1);
|
||
dst = pvPtr->next;
|
||
}
|
||
|
||
if (type == TCL_NORMAL) {
|
||
copy:
|
||
*dst = c;
|
||
dst++;
|
||
src++;
|
||
} else if (type == TCL_SPACE) {
|
||
goto wordEnd;
|
||
} else if (type == TCL_DOLLAR) {
|
||
int length;
|
||
char *value;
|
||
|
||
value = Tcl_ParseVar(interp, src, termPtr);
|
||
if (value == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
src = *termPtr;
|
||
length = strlen(value);
|
||
if ((pvPtr->end - dst) <= length) {
|
||
pvPtr->next = dst;
|
||
(*pvPtr->expandProc)(pvPtr, length);
|
||
dst = pvPtr->next;
|
||
}
|
||
strcpy(dst, value);
|
||
dst += length;
|
||
} else if (type == TCL_COMMAND_END) {
|
||
if ((c == ']') && !(flags & TCL_BRACKET_TERM)) {
|
||
goto copy;
|
||
}
|
||
|
||
/*
|
||
* End of command; simulate a word-end first, so
|
||
* that the end-of-command can be processed as the
|
||
* first thing in a new word.
|
||
*/
|
||
|
||
goto wordEnd;
|
||
} else if (type == TCL_OPEN_BRACKET) {
|
||
pvPtr->next = dst;
|
||
result = TclParseNestedCmd(interp, src+1, flags, termPtr,
|
||
pvPtr);
|
||
if (result != TCL_OK) {
|
||
return result;
|
||
}
|
||
src = *termPtr;
|
||
dst = pvPtr->next;
|
||
} else if (type == TCL_BACKSLASH) {
|
||
int numRead;
|
||
|
||
*dst = Tcl_Backslash(src, &numRead);
|
||
|
||
/*
|
||
* The following special check allows a backslash-newline
|
||
* to be treated as a word-separator, as if the backslash
|
||
* and newline had been collapsed before command parsing
|
||
* began.
|
||
*/
|
||
|
||
if (src[1] == '\n') {
|
||
src += numRead;
|
||
goto wordEnd;
|
||
}
|
||
src += numRead;
|
||
dst++;
|
||
} else {
|
||
goto copy;
|
||
}
|
||
c = *src;
|
||
type = CHAR_TYPE(c);
|
||
}
|
||
} else {
|
||
|
||
/*
|
||
* Check for the end of the command.
|
||
*/
|
||
|
||
if (type == TCL_COMMAND_END) {
|
||
if (flags & TCL_BRACKET_TERM) {
|
||
if (c == '\0') {
|
||
Tcl_SetResult(interp, "missing close-bracket",
|
||
TCL_STATIC);
|
||
return TCL_ERROR;
|
||
}
|
||
} else {
|
||
if (c == ']') {
|
||
goto normalArg;
|
||
}
|
||
}
|
||
goto done;
|
||
}
|
||
|
||
/*
|
||
* Now handle the special cases: open braces, double-quotes,
|
||
* and backslash-newline.
|
||
*/
|
||
|
||
pvPtr->next = dst;
|
||
if (type == TCL_QUOTE) {
|
||
result = TclParseQuotes(interp, src+1, '"', flags,
|
||
termPtr, pvPtr);
|
||
} else if (type == TCL_OPEN_BRACE) {
|
||
result = TclParseBraces(interp, src+1, termPtr, pvPtr);
|
||
} else if ((type == TCL_BACKSLASH) && (src[1] == '\n')) {
|
||
/*
|
||
* This code is needed so that a backslash-newline at the
|
||
* very beginning of a word is treated as part of the white
|
||
* space between words and not as a space within the word.
|
||
*/
|
||
|
||
src += 2;
|
||
goto skipSpace;
|
||
} else {
|
||
goto normalArg;
|
||
}
|
||
if (result != TCL_OK) {
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
* Back from quotes or braces; make sure that the terminating
|
||
* character was the end of the word.
|
||
*/
|
||
|
||
c = **termPtr;
|
||
if ((c == '\\') && ((*termPtr)[1] == '\n')) {
|
||
/*
|
||
* Line is continued on next line; the backslash-newline
|
||
* sequence turns into space, which is OK. No need to do
|
||
* anything here.
|
||
*/
|
||
} else {
|
||
type = CHAR_TYPE(c);
|
||
if ((type != TCL_SPACE) && (type != TCL_COMMAND_END)) {
|
||
if (*src == '"') {
|
||
Tcl_SetResult(interp,
|
||
"extra characters after close-quote",
|
||
TCL_STATIC);
|
||
} else {
|
||
Tcl_SetResult(interp,
|
||
"extra characters after close-brace",
|
||
TCL_STATIC);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
src = *termPtr;
|
||
dst = pvPtr->next;
|
||
}
|
||
|
||
/*
|
||
* We're at the end of a word, so add a null terminator. Then
|
||
* see if the buffer was re-allocated during this word. If so,
|
||
* update all of the argv pointers.
|
||
*/
|
||
|
||
wordEnd:
|
||
*dst = '\0';
|
||
dst++;
|
||
if (oldBuffer != pvPtr->buffer) {
|
||
int i;
|
||
|
||
for (i = 0; i <= argc; i++) {
|
||
argv[i] = pvPtr->buffer + (argv[i] - oldBuffer);
|
||
}
|
||
oldBuffer = pvPtr->buffer;
|
||
}
|
||
}
|
||
|
||
done:
|
||
pvPtr->next = dst;
|
||
*termPtr = src;
|
||
*argcPtr = argc;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TclExpandParseValue --
|
||
*
|
||
* This procedure is commonly used as the value of the
|
||
* expandProc in a ParseValue. It uses malloc to allocate
|
||
* more space for the result of a parse.
|
||
*
|
||
* Results:
|
||
* The buffer space in *pvPtr is reallocated to something
|
||
* larger, and if pvPtr->clientData is non-zero the old
|
||
* buffer is freed. Information is copied from the old
|
||
* buffer to the new one.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclExpandParseValue(pvPtr, needed)
|
||
register ParseValue *pvPtr; /* Information about buffer that
|
||
* must be expanded. If the clientData
|
||
* in the structure is non-zero, it
|
||
* means that the current buffer is
|
||
* dynamically allocated. */
|
||
int needed; /* Minimum amount of additional space
|
||
* to allocate. */
|
||
{
|
||
int newSpace;
|
||
char *new;
|
||
|
||
/*
|
||
* Either double the size of the buffer or add enough new space
|
||
* to meet the demand, whichever produces a larger new buffer.
|
||
*/
|
||
|
||
newSpace = (pvPtr->end - pvPtr->buffer) + 1;
|
||
if (newSpace < needed) {
|
||
newSpace += needed;
|
||
} else {
|
||
newSpace += newSpace;
|
||
}
|
||
new = (char *) ckalloc((unsigned) newSpace);
|
||
|
||
/*
|
||
* Copy from old buffer to new, free old buffer if needed, and
|
||
* mark new buffer as malloc-ed.
|
||
*/
|
||
|
||
memcpy((VOID *) new, (VOID *) pvPtr->buffer,
|
||
(size_t) (pvPtr->next - pvPtr->buffer));
|
||
pvPtr->next = new + (pvPtr->next - pvPtr->buffer);
|
||
if (pvPtr->clientData != 0) {
|
||
ckfree(pvPtr->buffer);
|
||
}
|
||
pvPtr->buffer = new;
|
||
pvPtr->end = new + newSpace - 1;
|
||
pvPtr->clientData = (ClientData) 1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclWordEnd --
|
||
*
|
||
* Given a pointer into a Tcl command, find the end of the next
|
||
* word of the command.
|
||
*
|
||
* Results:
|
||
* The return value is a pointer to the last character that's part
|
||
* of the word pointed to by "start". If the word doesn't end
|
||
* properly within the string then the return value is the address
|
||
* of the null character at the end of the string.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
char *
|
||
TclWordEnd(start, nested, semiPtr)
|
||
char *start; /* Beginning of a word of a Tcl command. */
|
||
int nested; /* Zero means this is a top-level command.
|
||
* One means this is a nested command (close
|
||
* bracket is a word terminator). */
|
||
int *semiPtr; /* Set to 1 if word ends with a command-
|
||
* terminating semi-colon, zero otherwise.
|
||
* If NULL then ignored. */
|
||
{
|
||
register char *p;
|
||
int count;
|
||
|
||
if (semiPtr != NULL) {
|
||
*semiPtr = 0;
|
||
}
|
||
|
||
/*
|
||
* Skip leading white space (backslash-newline must be treated like
|
||
* white-space, except that it better not be the last thing in the
|
||
* command).
|
||
*/
|
||
|
||
for (p = start; ; p++) {
|
||
if (isspace(UCHAR(*p))) {
|
||
continue;
|
||
}
|
||
if ((p[0] == '\\') && (p[1] == '\n')) {
|
||
if (p[2] == 0) {
|
||
return p+2;
|
||
}
|
||
continue;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* Handle words beginning with a double-quote or a brace.
|
||
*/
|
||
|
||
if (*p == '"') {
|
||
p = QuoteEnd(p+1, '"');
|
||
if (*p == 0) {
|
||
return p;
|
||
}
|
||
p++;
|
||
} else if (*p == '{') {
|
||
int braces = 1;
|
||
while (braces != 0) {
|
||
p++;
|
||
while (*p == '\\') {
|
||
(void) Tcl_Backslash(p, &count);
|
||
p += count;
|
||
}
|
||
if (*p == '}') {
|
||
braces--;
|
||
} else if (*p == '{') {
|
||
braces++;
|
||
} else if (*p == 0) {
|
||
return p;
|
||
}
|
||
}
|
||
p++;
|
||
}
|
||
|
||
/*
|
||
* Handle words that don't start with a brace or double-quote.
|
||
* This code is also invoked if the word starts with a brace or
|
||
* double-quote and there is garbage after the closing brace or
|
||
* quote. This is an error as far as Tcl_Eval is concerned, but
|
||
* for here the garbage is treated as part of the word.
|
||
*/
|
||
|
||
while (1) {
|
||
if (*p == '[') {
|
||
p = ScriptEnd(p+1, 1);
|
||
if (*p == 0) {
|
||
return p;
|
||
}
|
||
p++;
|
||
} else if (*p == '\\') {
|
||
if (p[1] == '\n') {
|
||
/*
|
||
* Backslash-newline: it maps to a space character
|
||
* that is a word separator, so the word ends just before
|
||
* the backslash.
|
||
*/
|
||
|
||
return p-1;
|
||
}
|
||
(void) Tcl_Backslash(p, &count);
|
||
p += count;
|
||
} else if (*p == '$') {
|
||
p = VarNameEnd(p);
|
||
if (*p == 0) {
|
||
return p;
|
||
}
|
||
p++;
|
||
} else if (*p == ';') {
|
||
/*
|
||
* Include the semi-colon in the word that is returned.
|
||
*/
|
||
|
||
if (semiPtr != NULL) {
|
||
*semiPtr = 1;
|
||
}
|
||
return p;
|
||
} else if (isspace(UCHAR(*p))) {
|
||
return p-1;
|
||
} else if ((*p == ']') && nested) {
|
||
return p-1;
|
||
} else if (*p == 0) {
|
||
if (nested) {
|
||
/*
|
||
* Nested commands can't end because of the end of the
|
||
* string.
|
||
*/
|
||
return p;
|
||
}
|
||
return p-1;
|
||
} else {
|
||
p++;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* QuoteEnd --
|
||
*
|
||
* Given a pointer to a string that obeys the parsing conventions
|
||
* for quoted things in Tcl, find the end of that quoted thing.
|
||
* The actual thing may be a quoted argument or a parenthesized
|
||
* index name.
|
||
*
|
||
* Results:
|
||
* The return value is a pointer to the last character that is
|
||
* part of the quoted string (i.e the character that's equal to
|
||
* term). If the quoted string doesn't terminate properly then
|
||
* the return value is a pointer to the null character at the
|
||
* end of the string.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static char *
|
||
QuoteEnd(string, term)
|
||
char *string; /* Pointer to character just after opening
|
||
* "quote". */
|
||
int term; /* This character will terminate the
|
||
* quoted string (e.g. '"' or ')'). */
|
||
{
|
||
register char *p = string;
|
||
int count;
|
||
|
||
while (*p != term) {
|
||
if (*p == '\\') {
|
||
(void) Tcl_Backslash(p, &count);
|
||
p += count;
|
||
} else if (*p == '[') {
|
||
for (p++; *p != ']'; p++) {
|
||
p = TclWordEnd(p, 1, (int *) NULL);
|
||
if (*p == 0) {
|
||
return p;
|
||
}
|
||
}
|
||
p++;
|
||
} else if (*p == '$') {
|
||
p = VarNameEnd(p);
|
||
if (*p == 0) {
|
||
return p;
|
||
}
|
||
p++;
|
||
} else if (*p == 0) {
|
||
return p;
|
||
} else {
|
||
p++;
|
||
}
|
||
}
|
||
return p-1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* VarNameEnd --
|
||
*
|
||
* Given a pointer to a variable reference using $-notation, find
|
||
* the end of the variable name spec.
|
||
*
|
||
* Results:
|
||
* The return value is a pointer to the last character that
|
||
* is part of the variable name. If the variable name doesn't
|
||
* terminate properly then the return value is a pointer to the
|
||
* null character at the end of the string.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static char *
|
||
VarNameEnd(string)
|
||
char *string; /* Pointer to dollar-sign character. */
|
||
{
|
||
register char *p = string+1;
|
||
|
||
if (*p == '{') {
|
||
for (p++; (*p != '}') && (*p != 0); p++) {
|
||
/* Empty loop body. */
|
||
}
|
||
return p;
|
||
}
|
||
while (isalnum(UCHAR(*p)) || (*p == '_')) {
|
||
p++;
|
||
}
|
||
if ((*p == '(') && (p != string+1)) {
|
||
return QuoteEnd(p+1, ')');
|
||
}
|
||
return p-1;
|
||
}
|
||
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ScriptEnd --
|
||
*
|
||
* Given a pointer to the beginning of a Tcl script, find the end of
|
||
* the script.
|
||
*
|
||
* Results:
|
||
* The return value is a pointer to the last character that's part
|
||
* of the script pointed to by "p". If the command doesn't end
|
||
* properly within the string then the return value is the address
|
||
* of the null character at the end of the string.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static char *
|
||
ScriptEnd(p, nested)
|
||
char *p; /* Script to check. */
|
||
int nested; /* Zero means this is a top-level command.
|
||
* One means this is a nested command (the
|
||
* last character of the script must be
|
||
* an unquoted ]). */
|
||
{
|
||
int commentOK = 1;
|
||
int length;
|
||
|
||
while (1) {
|
||
while (isspace(UCHAR(*p))) {
|
||
if (*p == '\n') {
|
||
commentOK = 1;
|
||
}
|
||
p++;
|
||
}
|
||
if ((*p == '#') && commentOK) {
|
||
do {
|
||
if (*p == '\\') {
|
||
/*
|
||
* If the script ends with backslash-newline, then
|
||
* this command isn't complete.
|
||
*/
|
||
|
||
if ((p[1] == '\n') && (p[2] == 0)) {
|
||
return p+2;
|
||
}
|
||
Tcl_Backslash(p, &length);
|
||
p += length;
|
||
} else {
|
||
p++;
|
||
}
|
||
} while ((*p != 0) && (*p != '\n'));
|
||
continue;
|
||
}
|
||
p = TclWordEnd(p, nested, &commentOK);
|
||
if (*p == 0) {
|
||
return p;
|
||
}
|
||
p++;
|
||
if (nested) {
|
||
if (*p == ']') {
|
||
return p;
|
||
}
|
||
} else {
|
||
if (*p == 0) {
|
||
return p-1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_ParseVar --
|
||
*
|
||
* Given a string starting with a $ sign, parse off a variable
|
||
* name and return its value.
|
||
*
|
||
* Results:
|
||
* The return value is the contents of the variable given by
|
||
* the leading characters of string. If termPtr isn't NULL,
|
||
* *termPtr gets filled in with the address of the character
|
||
* just after the last one in the variable specifier. If the
|
||
* variable doesn't exist, then the return value is NULL and
|
||
* an error message will be left in interp->result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
char *
|
||
Tcl_ParseVar(interp, string, termPtr)
|
||
Tcl_Interp *interp; /* Context for looking up variable. */
|
||
register char *string; /* String containing variable name.
|
||
* First character must be "$". */
|
||
char **termPtr; /* If non-NULL, points to word to fill
|
||
* in with character just after last
|
||
* one in the variable specifier. */
|
||
|
||
{
|
||
char *name1, *name1End, c, *result;
|
||
register char *name2;
|
||
#define NUM_CHARS 200
|
||
char copyStorage[NUM_CHARS];
|
||
ParseValue pv;
|
||
|
||
/*
|
||
* There are three cases:
|
||
* 1. The $ sign is followed by an open curly brace. Then the variable
|
||
* name is everything up to the next close curly brace, and the
|
||
* variable is a scalar variable.
|
||
* 2. The $ sign is not followed by an open curly brace. Then the
|
||
* variable name is everything up to the next character that isn't
|
||
* a letter, digit, or underscore. If the following character is an
|
||
* open parenthesis, then the information between parentheses is
|
||
* the array element name, which can include any of the substitutions
|
||
* permissible between quotes.
|
||
* 3. The $ sign is followed by something that isn't a letter, digit,
|
||
* or underscore: in this case, there is no variable name, and "$"
|
||
* is returned.
|
||
*/
|
||
|
||
name2 = NULL;
|
||
string++;
|
||
if (*string == '{') {
|
||
string++;
|
||
name1 = string;
|
||
while (*string != '}') {
|
||
if (*string == 0) {
|
||
Tcl_SetResult(interp, "missing close-brace for variable name",
|
||
TCL_STATIC);
|
||
if (termPtr != 0) {
|
||
*termPtr = string;
|
||
}
|
||
return NULL;
|
||
}
|
||
string++;
|
||
}
|
||
name1End = string;
|
||
string++;
|
||
} else {
|
||
name1 = string;
|
||
while (isalnum(UCHAR(*string)) || (*string == '_')) {
|
||
string++;
|
||
}
|
||
if (string == name1) {
|
||
if (termPtr != 0) {
|
||
*termPtr = string;
|
||
}
|
||
return "$";
|
||
}
|
||
name1End = string;
|
||
if (*string == '(') {
|
||
char *end;
|
||
|
||
/*
|
||
* Perform substitutions on the array element name, just as
|
||
* is done for quotes.
|
||
*/
|
||
|
||
pv.buffer = pv.next = copyStorage;
|
||
pv.end = copyStorage + NUM_CHARS - 1;
|
||
pv.expandProc = TclExpandParseValue;
|
||
pv.clientData = (ClientData) NULL;
|
||
if (TclParseQuotes(interp, string+1, ')', 0, &end, &pv)
|
||
!= TCL_OK) {
|
||
char msg[200];
|
||
int length;
|
||
|
||
length = string-name1;
|
||
if (length > 100) {
|
||
length = 100;
|
||
}
|
||
sprintf(msg, "\n (parsing index for array \"%.*s\")",
|
||
length, name1);
|
||
Tcl_AddErrorInfo(interp, msg);
|
||
result = NULL;
|
||
name2 = pv.buffer;
|
||
if (termPtr != 0) {
|
||
*termPtr = end;
|
||
}
|
||
goto done;
|
||
}
|
||
Tcl_ResetResult(interp);
|
||
string = end;
|
||
name2 = pv.buffer;
|
||
}
|
||
}
|
||
if (termPtr != 0) {
|
||
*termPtr = string;
|
||
}
|
||
|
||
if (((Interp *) interp)->noEval) {
|
||
return "";
|
||
}
|
||
c = *name1End;
|
||
*name1End = 0;
|
||
result = Tcl_GetVar2(interp, name1, name2, TCL_LEAVE_ERR_MSG);
|
||
*name1End = c;
|
||
|
||
done:
|
||
if ((name2 != NULL) && (pv.buffer != copyStorage)) {
|
||
ckfree(pv.buffer);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_CommandComplete --
|
||
*
|
||
* Given a partial or complete Tcl command, this procedure
|
||
* determines whether the command is complete in the sense
|
||
* of having matched braces and quotes and brackets.
|
||
*
|
||
* Results:
|
||
* 1 is returned if the command is complete, 0 otherwise.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_CommandComplete(cmd)
|
||
char *cmd; /* Command to check. */
|
||
{
|
||
char *p;
|
||
|
||
if (*cmd == 0) {
|
||
return 1;
|
||
}
|
||
p = ScriptEnd(cmd, 0);
|
||
return (*p != 0);
|
||
}
|