diff options
Diffstat (limited to 'generic/tclCompCmds.c')
| -rw-r--r-- | generic/tclCompCmds.c | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c index ef1d91f..91ffe13 100644 --- a/generic/tclCompCmds.c +++ b/generic/tclCompCmds.c @@ -6,11 +6,12 @@ * * Copyright (c) 1997-1998 Sun Microsystems, Inc. * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved. + * Copyright (c) 2002 ActiveState Corporation. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclCompCmds.c,v 1.23 2002/01/30 02:50:46 hobbs Exp $ + * RCS: @(#) $Id: tclCompCmds.c,v 1.24 2002/02/07 01:04:00 hobbs Exp $ */ #include "tclInt.h" @@ -2227,12 +2228,19 @@ TclCompileRegexpCmd(interp, parsePtr, envPtr) * If it has a '-', it could be an incorrectly formed regexp command. */ varTokenPtr = varTokenPtr + (varTokenPtr->numComponents + 1); - if ((varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) - || (*(varTokenPtr[1].start) == '-')) { - return TCL_OUT_LINE_COMPILE; - } str = varTokenPtr[1].start; len = varTokenPtr[1].size; + if ((varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) || (*str == '-')) { + return TCL_OUT_LINE_COMPILE; + } + + if (len == 0) { + /* + * The semantics of regexp are always match on re == "". + */ + TclEmitPush(TclRegisterLiteral(envPtr, "1", 1, 0), envPtr); + return TCL_OK; + } /* * On the first (pattern) arg, check to see if any RE special characters @@ -2241,7 +2249,24 @@ TclCompileRegexpCmd(interp, parsePtr, envPtr) * range. If -nocase was specified, we can't do this because INST_STR_EQ * has no support for nocase. */ - if ((len > 1) && (str[0] == '^') && (str[len-1] == '$')) { + + if (Tcl_RegExpCompile(NULL, str) == NULL) { + /* + * This is a bad RE. Let it complain at runtime. + */ + return TCL_OUT_LINE_COMPILE; + } +#if 0 + if ((len > 2) && (*str == '.') && (str[1] == '*')) { + str += 2; len -= 2; + } + if ((len > 2) && (str[len-3] != '\\') + && (str[len-2] == '.') && (str[len-1] == '*')) { + len -= 2; + } +#endif + if ((len > 1) && (str[0] == '^') && (str[len-1] == '$') + && (str[len-2] != '\\')) { /* * It appears and exact search was requested (ie ^foo$), so strip * off the special chars and signal exactMatch. |