pier 01/06/25 18:37:57 Added: service/native replace.c Log: Full UNIX service implementation checkin Revision Changes Path 1.1 jakarta-tomcat-4.0/service/native/replace.c Index: replace.c =================================================================== /* ========================================================================= * * * * The Apache Software License, Version 1.1 * * * * Copyright (c) 1999-2001 The Apache Software Foundation. * * All rights reserved. * * * * ========================================================================= * * * * Redistribution and use in source and binary forms, with or without modi- * * fication, are permitted provided that the following conditions are met: * * * * 1. Redistributions of source code must retain the above copyright notice * * notice, this list of conditions and the following disclaimer. * * * * 2. Redistributions in binary form must reproduce the above copyright * * notice, this list of conditions and the following disclaimer in the * * documentation and/or other materials provided with the distribution. * * * * 3. The end-user documentation included with the redistribution, if any, * * must include the following acknowlegement: * * * * "This product includes software developed by the Apache Software * * Foundation <http://www.apache.org/>." * * * * Alternately, this acknowlegement may appear in the software itself, if * * and wherever such third-party acknowlegements normally appear. * * * * 4. The names "The Jakarta Project", "WebApp", and "Apache Software * * Foundation" must not be used to endorse or promote products derived * * from this software without prior written permission. For written * * permission, please contact <[EMAIL PROTECTED]>. * * * * 5. Products derived from this software may not be called "Apache" nor may * * "Apache" appear in their names without prior written permission of the * * Apache Software Foundation. * * * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES * * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * * THE APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY * * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * * POSSIBILITY OF SUCH DAMAGE. * * * * ========================================================================= * * * * This software consists of voluntary contributions made by many indivi- * * duals on behalf of the Apache Software Foundation. For more information * * on the Apache Software Foundation, please see <http://www.apache.org/>. * * * * ========================================================================= */ /* @version $Id: replace.c,v 1.1 2001/06/26 01:37:56 pier Exp $ */ #include "jsvc.h" /* Replace all occurrences of a string in another */ int replace(char *new, int len, char *old, char *mch, char *rpl) { char *tmp; int count; int shift; int nlen; int olen; int mlen; int rlen; int x; /* The new buffer is NULL, fail */ if (new==NULL) return(-1); /* The length of the buffer is less than zero, fail */ if (len<0) return(-2); /* The old buffer is NULL, fail */ if (old==NULL) return(-3); /* The string to be matched is NULL or empty, simply copy */ if ((mch==NULL)||(strlen(mch)==0)) { olen=strlen(old); if (len<=olen) return(olen+1); strcpy(new,old); return(0); } /* The string to be replaced is NULL, assume it's an empty string */ if (rpl==NULL) rpl=""; /* Evaluate some lengths */ olen=strlen(old); mlen=strlen(mch); rlen=strlen(rpl); /* Calculate how many times the mch string appears in old */ tmp=old; count=0; while((tmp=strstr(tmp,mch))!=NULL) { count++; tmp+=mlen; } /* We have no matches, simply copy */ if (count==0) { olen=strlen(old); if (len<=olen) return(olen+1); strcpy(new,old); return(0); } /* Calculate how big the buffer must be to hold the translation and of how many bytes we need to shift the data */ shift=rlen-mlen; nlen=olen+(shift*count); // printf("Count=%d Shift= %d OLen=%d NLen=%d\n",count,shift,olen,nlen); /* Check if we have enough size in the buffer */ if (nlen>=len) return(nlen+1); /* Copy over the old buffer in the new one (save memory) */ strcpy(new,old); /* Start replacing */ tmp=new; while((tmp=strstr(tmp,mch))!=NULL) { /* If shift is > 0 we need to move data from right to left */ if (shift>0) { for (x=(strlen(tmp)+shift);x>shift;x--) { // printf("src %c(%d) dst %c(%d)\n", // tmp[x-shift],tmp[x-shift],tmp[x],tmp[x]); tmp[x]=tmp[x-shift]; } /* If shift is < 0 we need to move data from left to right */ } else if (shift<0) { for (x=mlen;x<strlen(tmp)-shift;x++) { // printf("src %c(%d) dst %c(%d)\n", // tmp[x],tmp[x],tmp[x+shift],tmp[x+shift]); tmp[x+shift]=tmp[x]; } } /* If shift is = 0 we don't have to shift data */ strncpy(tmp,rpl,rlen); tmp+=rlen; // printf("\"%s\"\n",tmp); } return(0); }
