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/* Copyright (c) 1990 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Regular expression parsing routines. |
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* |
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* External symbols declared in standard.h |
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*/ |
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|
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <ctype.h> |
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/* |
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* rexpr.c - regular expression parser (ala grep) |
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#define memcpy(to,from,len) bcopy(from,to,len) |
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#endif |
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static int advance(), cclass(); |
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|
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static char expbuf[ESIZE]; |
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static int iflag; |
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static int circf; |
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if ((c = *sp++) == '\0') |
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return(-1); |
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if (c == '<') { |
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*ep++ = CBRC; |
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if (ep == expbuf || ep[-1] != CBRC) |
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*ep++ = CBRC; |
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continue; |
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} |
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if (c == '>') { |
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char * |
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expsave() /* save compiled string */ |
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{ |
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extern char *malloc(); |
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register char *ep; |
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if (explen == 0) |
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return(NULL); |
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if ((ep = malloc(explen+3)) == NULL) |
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if ((ep = (char *)malloc(explen+3)) == NULL) |
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return(NULL); |
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ep[0] = iflag; |
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ep[1] = circf; |
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return(ep); |
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} |
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void |
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expset(ep) /* install saved string */ |
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register char *ep; |
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{ |
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} |
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char * |
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eindex(sp) /* find the expression in str */ |
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eindex(sp) /* find the expression in string sp */ |
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register char *sp; |
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{ |
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if (circf) { |
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if (advance(sp, expbuf)) |
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return(sp); |
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/* check for match at beginning of line, watch CBRC */ |
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if (advance(sp, expbuf[0]==CBRC ? expbuf+1 : expbuf)) |
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return(sp); |
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if (circf) |
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return(NULL); |
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} |
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/* fast check for first character */ |
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if (expbuf[0]==CCHR) { |
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register c = expbuf[1]; |
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do { |
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while (*++sp) |
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if (same(*sp, c) && advance(sp, expbuf)) |
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return(sp); |
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} while (*sp++); |
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return(NULL); |
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} |
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/* regular algorithm */ |
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do { |
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while (*++sp) |
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if (advance(sp, expbuf)) |
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return(sp); |
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} while (*sp++); |
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return(NULL); |
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} |
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return(0); |
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case CBRC: |
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if (lp == expbuf) |
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continue; |
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if ((isalnum(*lp) || *lp == '_') && !(isalnum(lp[-1]) || lp[-1] == '_')) |
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continue; |
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return (0); |
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cclass(set, c, af) |
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register char *set; |
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register c; |
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int af; |
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{ |
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register n; |
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