soltools/mkdepend/cppsetup.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* $XConsortium: cppsetup.c,v 1.13 94/04/17 20:10:32 gildea Exp $ */
   3 /*
   4
   5 Copyright (c) 1993, 1994  X Consortium
   6
   7 Permission is hereby granted, free of charge, to any person obtaining a copy
   8 of this software and associated documentation files (the "Software"), to deal
   9 in the Software without restriction, including without limitation the rights
  10 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 copies of the Software, and to permit persons to whom the Software is
  12 furnished to do so, subject to the following conditions:
  13
  14 The above copyright notice and this permission notice shall be included in
  15 all copies or substantial portions of the Software.
  16
  17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  20 X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23
  24 Except as contained in this notice, the name of the X Consortium shall not be
  25 used in advertising or otherwise to promote the sale, use or other dealings
  26 in this Software without prior written authorization from the X Consortium.
  27
  28 */
  29
  30 #include "def.h"
  31
  32 #ifdef  CPP
  33 /*
  34  * This file is strictly for the sake of cpy.y and yylex.c (if
  35  * you indeed have the source for cpp).
  36  */
  37 #define IB 1
  38 #define SB 2
  39 #define NB 4
  40 #define CB 8
  41 #define QB 16
  42 #define WB 32
  43 #define SALT '#'
  44 #if pdp11 | vax | ns16000 | mc68000 | ibm032
  45 #define COFF 128
  46 #else
  47 #define COFF 0
  48 #endif
  49 /*
  50  * These variables used by cpy.y and yylex.c
  51  */
  52 extern char *outp, *inp, *newp, *pend;
  53 extern char *ptrtab;
  54 extern char fastab[];
  55 extern char slotab[];
  56
  57 /*
  58  * cppsetup
  59  */
  60 struct filepointer  *currentfile;
  61 struct inclist      *currentinc;
  62
  63 cppsetup(line, filep, inc)
  64     register char   *line;
  65     register struct filepointer *filep;
  66     register struct inclist     *inc;
  67 {
  68     register char *p, savec;
  69     static boolean setupdone = FALSE;
  70     boolean value;
  71
  72     if (!setupdone) {
  73         cpp_varsetup();
  74         setupdone = TRUE;
  75     }
  76
  77     currentfile = filep;
  78     currentinc = inc;
  79     inp = newp = line;
  80     for (p=newp; *p; p++)
  81         ;
  82
  83     /*
  84      * put a newline back on the end, and set up pend, etc.
  85      */
  86     *p++ = '\n';
  87     savec = *p;
  88     *p = '\0';
  89     pend = p;
  90
  91     ptrtab = slotab+COFF;
  92     *--inp = SALT;
  93     outp=inp;
  94     value = yyparse();
  95     *p = savec;
  96     return(value);
  97 }
  98
  99 pperror(tag, x0,x1,x2,x3,x4)
 100     int tag,x0,x1,x2,x3,x4;
 101 {
 102     warning("\"%s\", line %d: ", currentinc->i_file, currentfile->f_line);
 103     warning(x0,x1,x2,x3,x4);
 104 }
 105
 106
 107 yyerror(s)
 108     register char   *s;
 109 {
 110     fatalerr("Fatal error: %s\n", s);
 111 }
 112 #else /* not CPP */
 113
 114 #include "ifparser.h"
 115 struct _parse_data {
 116     struct filepointer *filep;
 117     struct inclist *inc;
 118     const char *line;
 119 };
 120
 121 static const char *
 122 _my_if_errors (ip, cp, expecting)
 123     IfParser *ip;
 124     const char *cp;
 125     const char *expecting;
 126 {
 127 #ifdef DEBUG_MKDEPEND
 128     struct _parse_data *pd = (struct _parse_data *) ip->data;
 129     int lineno = pd->filep->f_line;
 130     char *filename = pd->inc->i_file;
 131     char prefix[300];
 132     int prefixlen;
 133     int i;
 134
 135     sprintf (prefix, "\"%s\":%d", filename, lineno);
 136     prefixlen = strlen(prefix);
 137     fprintf (stderr, "%s:  %s", prefix, pd->line);
 138     i = cp - pd->line;
 139     if (i > 0 && pd->line[i-1] != '\n') {
 140     putc ('\n', stderr);
 141     }
 142     for (i += prefixlen + 3; i > 0; i--) {
 143     putc (' ', stderr);
 144     }
 145     fprintf (stderr, "^--- expecting %s\n", expecting);
 146 #endif /* DEBUG_MKDEPEND */
 147     (void)ip;
 148     (void)cp;
 149     (void)expecting;
 150     return NULL;
 151 }
 152
 153
 154 #define MAXNAMELEN 256
 155
 156 char *
 157 _lookup_variable (var, len)
 158     const char *var;
 159     int len;
 160 {
 161     char tmpbuf[MAXNAMELEN + 1];
 162
 163     if (len > MAXNAMELEN)
 164     return 0;
 165
 166     strncpy (tmpbuf, var, len);
 167     tmpbuf[len] = '\0';
 168     return isdefined(tmpbuf);
 169 }
 170
 171
 172 static int
 173 _my_eval_defined (ip, var, len)
 174     IfParser *ip;
 175     const char *var;
 176     int len;
 177 {
 178     (void)ip;
 179     if (_lookup_variable (var, len))
 180     return 1;
 181     else
 182     return 0;
 183 }
 184
 185 #define isvarfirstletter(ccc) (isalpha(ccc) || (ccc) == '_')
 186
 187 static int
 188 _my_eval_variable (ip, var, len)
 189     IfParser *ip;
 190     const char *var;
 191     int len;
 192 {
 193     char *s;
 194
 195     (void)ip;
 196
 197     s = _lookup_variable (var, len);
 198     if (!s)
 199     return 0;
 200     do {
 201     var = s;
 202     if (!isvarfirstletter(*var))
 203         break;
 204     s = _lookup_variable (var, strlen(var));
 205     } while (s);
 206
 207     return atoi(var);
 208 }
 209
 210
 211 int cppsetup(line, filep, inc)
 212     register char   *line;
 213     register struct filepointer *filep;
 214     register struct inclist     *inc;
 215 {
 216     IfParser ip;
 217     struct _parse_data pd;
 218     int val = 0;
 219
 220     pd.filep = filep;
 221     pd.inc = inc;
 222     pd.line = line;
 223     ip.funcs.handle_error = _my_if_errors;
 224     ip.funcs.eval_defined = _my_eval_defined;
 225     ip.funcs.eval_variable = _my_eval_variable;
 226     ip.data = (char *) &pd;
 227
 228     (void) ParseIfExpression (&ip, line, &val);
 229     if (val)
 230     return IF;
 231     else
 232     return IFFALSE;
 233 }
 234 #endif /* CPP */
 235
 236 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */