/******************************************************************************/ /* */ /* X r d C n s X r e f . c c */ /* */ /* (c) 2009 by the Board of Trustees of the Leland Stanford, Jr., University */ /* All Rights Reserved */ /* Produced by Andrew Hanushevsky for Stanford University under contract */ /* DE-AC02-76-SFO0515 with the Department of Energy */ /* */ /* This file is part of the XRootD software suite. */ /* */ /* XRootD is free software: you can redistribute it and/or modify it under */ /* the terms of the GNU Lesser General Public License as published by the */ /* Free Software Foundation, either version 3 of the License, or (at your */ /* option) any later version. */ /* */ /* XRootD is distributed in the hope that it will be useful, but WITHOUT */ /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */ /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */ /* License for more details. */ /* */ /* You should have received a copy of the GNU Lesser General Public License */ /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */ /* COPYING (GPL license). If not, see . */ /* */ /* The copyright holder's institutional names and contributor's names may not */ /* be used to endorse or promote products derived from this software without */ /* specific prior written permission of the institution or contributor. */ /******************************************************************************/ #include "XrdCns/XrdCnsXref.hh" /******************************************************************************/ /* G l o b a l s */ /******************************************************************************/ char *XrdCnsXref::xIndex = (char *)"0123456789:;<=>?@" "ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`" "abcdefghijklmnopqrstuvwxyz{|}~"; /******************************************************************************/ /* C o n s t r u c t o r */ /******************************************************************************/ XrdCnsXref::XrdCnsXref(const char *dflt, int MTProt) { memset(yTable, 0, sizeof(yTable)); isMT = MTProt; if (dflt) Default(dflt); availIdx = 1; } /******************************************************************************/ /* D e s t r u c t o r */ /******************************************************************************/ XrdCnsXref::~XrdCnsXref() { int i; for (i = 0; i < yTSize; i++) if (yTable[i]) free(yTable[i]); } /******************************************************************************/ /* A d d */ /******************************************************************************/ char XrdCnsXref::Add(const char *kval, char idx) { XrdSysMutexHelper xHelp(isMT ? &xMutex : 0); char *oldx, *xKey = strdup(kval); int i, j; // If a character was specified, try to use it. // if (idx) {if ((i = c2i(idx)) < 0) {free(xKey); return 0;}} else if ((oldx = xTable.Find(xKey))) {free(xKey); return *oldx;} else if ((i = availI()) < 0) {free(xKey); return 0;} // Try to add the new entry // if (!(oldx = xTable.Add(xKey, xIndex+i, 0, Hash_keep))) yTable[i] = xKey; else if (*oldx != idx) {if ((j = c2i(*oldx)) >= 0) {if (yTable[j]) {xTable.Del(yTable[j]); free(yTable[j]); yTable[j] = 0;} xTable.Rep(xKey, xIndex+i, 0, Hash_keep); yTable[j] = xKey; } } else free(xKey); // Return the assigned character index // return xIndex[i]; } /******************************************************************************/ /* D e f a u l t */ /******************************************************************************/ char XrdCnsXref::Default(const char *kval) { return (kval ? Add(kval, xIndex[0]) : xIndex[0]); } /******************************************************************************/ /* K e y */ /******************************************************************************/ char *XrdCnsXref::Key(char idc) { XrdSysMutexHelper xHelp(isMT ? &xMutex : 0); int i = c2i(idc); if (i >= 0 && yTable[i]) return yTable[i]; return yTable[0]; } /******************************************************************************/ /* F i n d */ /******************************************************************************/ char XrdCnsXref::Find(const char *kval) { XrdSysMutexHelper xHelp(isMT ? &xMutex : 0); char *xdat; return ((xdat = xTable.Find(kval)) ? *xdat : char(0)); } /******************************************************************************/ /* P r i v a t e M e t h o d s */ /******************************************************************************/ /******************************************************************************/ /* Private: A v a i l I */ /******************************************************************************/ int XrdCnsXref::availI() { int idn; for (idn = availIdx; idn < yTSize; idn++) if (!yTable[idn]) {availIdx = idn+1; return idn;} return -1; } /******************************************************************************/ /* Private: c 2 i */ /******************************************************************************/ int XrdCnsXref::c2i(char xCode) { int n = static_cast(xCode); return (n <= 127 ? xCode - '0' : -1); }