soltools/cpp/_nlist.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include "cpp.h"
  24
  25 extern int Cplusplus;
  26 Nlist *kwdefined;
  27 char wd[128];
  28
  29 /*
  30     ER: Table was made extra large, because there seems to be a problem with the
  31     chaining. An nlist->next is sometimes overwritten somewhere, which
  32     results in a SIGSEGV. I canceled the GDB with watchpoint after 2 days, though...
  33     It works this way for now...
  34  */
  35 #define NLSIZE 15000
  36
  37 static Nlist *nlist[NLSIZE];
  38
  39 struct kwtab
  40 {
  41     char * const kw;
  42     int const val;
  43     int const flag;
  44 };
  45
  46 static const struct kwtab kwtab[] =
  47 {
  48         {"if", KIF, ISKW},
  49         {"ifdef", KIFDEF, ISKW},
  50         {"ifndef", KIFNDEF, ISKW},
  51         {"elif", KELIF, ISKW},
  52         {"else", KELSE, ISKW},
  53         {"endif", KENDIF, ISKW},
  54         {"include", KINCLUDE, ISKW},
  55         {"include_next", KINCLUDENEXT, ISKW},
  56         {"import", KIMPORT, ISKW},
  57         {"define", KDEFINE, ISKW},
  58         {"undef", KUNDEF, ISKW},
  59         {"line", KLINE, ISKW},
  60         {"error", KERROR, ISKW},
  61         {"pragma", KPRAGMA, ISKW},
  62         {"ident", KIDENT, ISKW},
  63         {"eval", KEVAL, ISKW},
  64         {"defined", KDEFINED, ISDEFINED + ISUNCHANGE},
  65         {"machine", KMACHINE, ISDEFINED + ISUNCHANGE},
  66         {"__LINE__", KLINENO, ISMAC + ISUNCHANGE},
  67         {"__FILE__", KFILE, ISMAC + ISUNCHANGE},
  68         {"__DATE__", KDATE, ISMAC + ISUNCHANGE},
  69         {"__TIME__", KTIME, ISMAC + ISUNCHANGE},
  70         {"__STDC__", KSTDC, ISUNCHANGE},
  71         {NULL, 0, 0}
  72 };
  73
  74 unsigned long namebit[077 + 1];
  75
  76 void
  77     setup_kwtab(void)
  78 {
  79     struct kwtab const *kp;
  80     Nlist *np;
  81     Token t;
  82     static Token deftoken[1] = {{NAME, 0, 7, (uchar *) "defined", 0}};
  83     static Tokenrow deftr = {deftoken, deftoken, deftoken + 1, 1};
  84
  85     for (kp = kwtab; kp->kw; kp++)
  86     {
  87         t.t = (uchar *) kp->kw;
  88         t.len = strlen(kp->kw);
  89         np = lookup(&t, 1);
  90         np->flag = (char) kp->flag;
  91         np->val = (char) kp->val;
  92         if (np->val == KDEFINED)
  93         {
  94             kwdefined = np;
  95             np->val = NAME;
  96             np->vp = &deftr;
  97             np->ap = NULL;
  98         }
  99     }
 100 }
 101
 102 Nlist *
 103     lookup(Token * tp, int install)
 104 {
 105     unsigned int h;
 106     Nlist *np;
 107     uchar *cp, *cpe;
 108
 109     h = 0;
 110     for (cp = tp->t, cpe = cp + tp->len; cp < cpe;)
 111         h += *cp++;
 112     h %= NLSIZE;
 113     np = nlist[h];
 114     while (np)
 115     {
 116         if (*tp->t == *np->name && tp->len == (unsigned int)np->len
 117             && strncmp((char *)tp->t, (char *)np->name, tp->len) == 0)
 118             return np;
 119         np = np->next;
 120     }
 121     if (install)
 122     {
 123         np = new(Nlist);
 124         np->vp = NULL;
 125         np->ap = NULL;
 126         np->flag = 0;
 127         np->val = 0;
 128         np->len = tp->len;
 129         np->name = newstring(tp->t, tp->len, 0);
 130         np->next = nlist[h];
 131         nlist[h] = np;
 132         quickset(tp->t[0], tp->len > 1 ? tp->t[1] : 0);
 133         return np;
 134     }
 135     return NULL;
 136 }
 137
 138 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */