diff options
Diffstat (limited to 'generic')
| -rw-r--r-- | generic/tclCompCmds.c | 93 |
1 files changed, 64 insertions, 29 deletions
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c index dfab488..ef1d91f 100644 --- a/generic/tclCompCmds.c +++ b/generic/tclCompCmds.c @@ -10,7 +10,7 @@ * 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 1.22 2002/01/29 02:40:50 hobbs Exp $ + * RCS: @(#) $Id: tclCompCmds.c,v 1.23 2002/01/30 02:50:46 hobbs Exp $ */ #include "tclInt.h" @@ -2176,28 +2176,63 @@ TclCompileRegexpCmd(interp, parsePtr, envPtr) { Tcl_Token *varTokenPtr; /* Pointer to the Tcl_Token representing * the parse of the RE or string */ - int length, code, exactMatch; + int i, len, code, exactMatch, nocase; char c, *str; - if (parsePtr->numWords != 3) { - /* We are only interested in compiling simple regexp cases. */ + /* + * We are only interested in compiling simple regexp cases. + * Currently supported compile cases are: + * regexp ?-nocase? ?--? staticString $var + * regexp ?-nocase? ?--? {^staticString$} $var + */ + if (parsePtr->numWords < 3) { return TCL_OUT_LINE_COMPILE; } - varTokenPtr = parsePtr->tokenPtr + (parsePtr->tokenPtr->numComponents + 1); - if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - /* Not a simple string - punt to runtime. */ + nocase = 0; + varTokenPtr = parsePtr->tokenPtr; + + /* + * We only look for -nocase and -- as options. Everything else + * gets pushed to runtime execution. This is different than regexp's + * runtime option handling, but satisfies our stricter needs. + */ + for (i = 1; i < parsePtr->numWords - 2; i++) { + varTokenPtr = varTokenPtr + (varTokenPtr->numComponents + 1); + if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { + /* Not a simple string - punt to runtime. */ + return TCL_OUT_LINE_COMPILE; + } + str = varTokenPtr[1].start; + len = varTokenPtr[1].size; + if ((len == 2) && (str[0] == '-') && (str[1] == '-')) { + i++; + break; + } else if ((len > 1) + && (strncmp(str, "-nocase", (unsigned) len) == 0)) { + nocase = 1; + } else { + /* Not an option we recognize. */ + return TCL_OUT_LINE_COMPILE; + } + } + + if ((parsePtr->numWords - i) != 2) { + /* We don't support capturing to variables */ return TCL_OUT_LINE_COMPILE; } - str = varTokenPtr[1].start; - length = varTokenPtr[1].size; - if (*str == '-') { - /* - * Looks like it may be an option. With 3 args, this is an - * incorrect call, but we punt on it here. - */ + + /* + * Get the regexp string. If it is not a simple string, punt to runtime. + * 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; /* * On the first (pattern) arg, check to see if any RE special characters @@ -2206,37 +2241,37 @@ TclCompileRegexpCmd(interp, parsePtr, envPtr) * range. If -nocase was specified, we can't do this because INST_STR_EQ * has no support for nocase. */ - if ((length > 1) && (str[0] == '^') && (str[length-1] == '$')) { + if ((len > 1) && (str[0] == '^') && (str[len-1] == '$')) { /* * It appears and exact search was requested (ie ^foo$), so strip * off the special chars and signal exactMatch. */ - str++; length -= 2; + str++; len -= 2; exactMatch = 1; } else { exactMatch = 0; } - c = str[length]; - str[length] = '\0'; + c = str[len]; + str[len] = '\0'; if (strpbrk(str, "*+?{}()[].\\|^$") != NULL) { - str[length] = c; + str[len] = c; /* We don't do anything with REs with special chars yet. */ return TCL_OUT_LINE_COMPILE; } - str[length] = c; + str[len] = c; if (exactMatch) { - TclEmitPush(TclRegisterLiteral(envPtr, str, length, 0), envPtr); + TclEmitPush(TclRegisterLiteral(envPtr, str, len, 0), envPtr); } else { /* * This needs to find the substring anywhere in the string, so * use string match and *foo*. */ - char *newStr = ckalloc((unsigned) length + 3); - newStr[0] = '*'; - strncpy(newStr + 1, str, (size_t) length); - newStr[length+1] = '*'; - newStr[length+2] = '\0'; - TclEmitPush(TclRegisterLiteral(envPtr, newStr, length+2, 0), envPtr); + char *newStr = ckalloc((unsigned) len + 3); + newStr[0] = '*'; + strncpy(newStr + 1, str, (size_t) len); + newStr[len+1] = '*'; + newStr[len+2] = '\0'; + TclEmitPush(TclRegisterLiteral(envPtr, newStr, len+2, 0), envPtr); ckfree((char *) newStr); } @@ -2255,10 +2290,10 @@ TclCompileRegexpCmd(interp, parsePtr, envPtr) } } - if (exactMatch) { + if (exactMatch && !nocase) { TclEmitOpcode(INST_STR_EQ, envPtr); } else { - TclEmitInstInt1(INST_STR_MATCH, 0 /* nocase */, envPtr); + TclEmitInstInt1(INST_STR_MATCH, nocase, envPtr); } return TCL_OK; |