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 <ctype.h>
  31
  32 #include "def.h"
  33
  34 #ifdef  CPP
  35 /*
  36  * This file is strictly for the sake of cpy.y and yylex.c (if
  37  * you indeed have the source for cpp).
  38  */
  39 #define IB 1
  40 #define SB 2
  41 #define NB 4
  42 #define CB 8
  43 #define QB 16
  44 #define WB 32
  45 #define SALT '#'
  46 #if pdp11 | vax | ns16000 | mc68000 | ibm032
  47 #define COFF 128
  48 #else
  49 #define COFF 0
  50 #endif
  51 /*
  52  * These variables used by cpy.y and yylex.c
  53  */
  54 extern char *outp, *inp, *newp, *pend;
  55 extern char *ptrtab;
  56 extern char fastab[];
  57 extern char slotab[];
  58
  59 /*
  60  * cppsetup
  61  */
  62 struct filepointer  *currentfile;
  63 struct inclist      *currentinc;
  64
  65 cppsetup(line, filep, inc)
  66     char   *line;
  67     struct filepointer *filep;
  68     struct inclist     *inc;
  69 {
  70     char *p, savec;
  71     static boolean setupdone = FALSE;
  72     boolean value;
  73
  74     if (!setupdone) {
  75         cpp_varsetup();
  76         setupdone = TRUE;
  77     }
  78
  79     currentfile = filep;
  80     currentinc = inc;
  81     inp = newp = line;
  82     for (p=newp; *p; p++)
  83         ;
  84
  85     /*
  86      * put a newline back on the end, and set up pend, etc.
  87      */
  88     *p++ = '\n';
  89     savec = *p;
  90     *p = '\0';
  91     pend = p;
  92
  93     ptrtab = slotab+COFF;
  94     *--inp = SALT;
  95     outp=inp;
  96     value = yyparse();
  97     *p = savec;
  98     return value;
  99 }
 100
 101 pperror(tag, x0,x1,x2,x3,x4)
 102     int tag,x0,x1,x2,x3,x4;
 103 {
 104     warning("\"%s\", line %d: ", currentinc->i_file, currentfile->f_line);
 105     warning(x0,x1,x2,x3,x4);
 106 }
 107
 108
 109 yyerror(s)
 110     char   *s;
 111 {
 112     fatalerr("Fatal error: %s\n", s);
 113 }
 114 #else /* not CPP */
 115
 116 #include "ifparser.h"
 117
 118 static const char *
 119 my_if_errors (IfParser *ip, const char *cp, const char *expecting)
 120 {
 121 #ifdef DEBUG_MKDEPEND
 122     struct parse_data *pd = (struct parse_data *) ip->data;
 123     int lineno = pd->filep->f_line;
 124     char *filename = pd->inc->i_file;
 125     char prefix[300];
 126     int prefixlen;
 127     int i;
 128
 129     sprintf (prefix, "\"%s\":%d", filename, lineno);
 130     prefixlen = strlen(prefix);
 131     fprintf (stderr, "%s:  %s", prefix, pd->line);
 132     i = cp - pd->line;
 133     if (i > 0 && pd->line[i-1] != '\n') {
 134     putc ('\n', stderr);
 135     }
 136     for (i += prefixlen + 3; i > 0; i--) {
 137     putc (' ', stderr);
 138     }
 139     fprintf (stderr, "^--- expecting %s\n", expecting);
 140 #endif /* DEBUG_MKDEPEND */
 141     (void)ip;
 142     (void)cp;
 143     (void)expecting;
 144     return NULL;
 145 }
 146
 147
 148 #define MAXNAMELEN 256
 149
 150 static char *
 151 lookup_variable (const char *var, size_t len)
 152 {
 153     char tmpbuf[MAXNAMELEN + 1];
 154
 155     if (len > MAXNAMELEN)
 156         return NULL;
 157
 158     strncpy (tmpbuf, var, len);
 159     tmpbuf[len] = '\0';
 160     return isdefined(tmpbuf);
 161 }
 162
 163
 164 static int
 165 my_eval_defined (IfParser *ip, const char *var, size_t len)
 166 {
 167     (void)ip;
 168     if (lookup_variable (var, len))
 169         return 1;
 170     else
 171         return 0;
 172 }
 173
 174 #define isvarfirstletter(ccc) (isalpha((unsigned char)(ccc)) || (ccc) == '_')
 175
 176 static int
 177 my_eval_variable (IfParser *ip, const char *var, size_t len)
 178 {
 179     char *s;
 180
 181     (void)ip;
 182
 183     s = lookup_variable (var, len);
 184     if (!s)
 185         return 0;
 186     do {
 187       var = s;
 188       if (!isvarfirstletter(*var))
 189         break;
 190       s = lookup_variable (var, strlen(var));
 191     } while (s);
 192
 193     return atoi(var);
 194 }
 195
 196
 197 int cppsetup(char const *line)
 198 {
 199     IfParser ip;
 200     int val = 0;
 201
 202     ip.funcs.handle_error = my_if_errors;
 203     ip.funcs.eval_defined = my_eval_defined;
 204     ip.funcs.eval_variable = my_eval_variable;
 205
 206     (void) ParseIfExpression (&ip, line, &val);
 207     if (val)
 208       return IF;
 209     else
 210       return IFFALSE;
 211 }
 212 #endif /* CPP */
 213
 214 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */