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     char   *line;
  65     struct filepointer *filep;
  66     struct inclist     *inc;
  67 {
  68     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     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 (IfParser *ip, const char *cp, const char *expecting)
 123 {
 124 #ifdef DEBUG_MKDEPEND
 125     struct parse_data *pd = (struct parse_data *) ip->data;
 126     int lineno = pd->filep->f_line;
 127     char *filename = pd->inc->i_file;
 128     char prefix[300];
 129     int prefixlen;
 130     int i;
 131
 132     sprintf (prefix, "\"%s\":%d", filename, lineno);
 133     prefixlen = strlen(prefix);
 134     fprintf (stderr, "%s:  %s", prefix, pd->line);
 135     i = cp - pd->line;
 136     if (i > 0 && pd->line[i-1] != '\n') {
 137     putc ('\n', stderr);
 138     }
 139     for (i += prefixlen + 3; i > 0; i--) {
 140     putc (' ', stderr);
 141     }
 142     fprintf (stderr, "^--- expecting %s\n", expecting);
 143 #endif /* DEBUG_MKDEPEND */
 144     (void)ip;
 145     (void)cp;
 146     (void)expecting;
 147     return NULL;
 148 }
 149
 150
 151 #define MAXNAMELEN 256
 152
 153 static char *
 154 lookup_variable (const char *var, size_t len)
 155 {
 156     char tmpbuf[MAXNAMELEN + 1];
 157
 158     if (len > MAXNAMELEN)
 159         return NULL;
 160
 161     strncpy (tmpbuf, var, len);
 162     tmpbuf[len] = '\0';
 163     return isdefined(tmpbuf);
 164 }
 165
 166
 167 static int
 168 my_eval_defined (IfParser *ip, const char *var, size_t len)
 169 {
 170     (void)ip;
 171     if (lookup_variable (var, len))
 172         return 1;
 173     else
 174         return 0;
 175 }
 176
 177 #define isvarfirstletter(ccc) (isalpha(ccc) || (ccc) == '_')
 178
 179 static int
 180 my_eval_variable (IfParser *ip, const char *var, size_t len)
 181 {
 182     char *s;
 183
 184     (void)ip;
 185
 186     s = lookup_variable (var, len);
 187     if (!s)
 188         return 0;
 189     do {
 190       var = s;
 191       if (!isvarfirstletter(*var))
 192         break;
 193       s = lookup_variable (var, strlen(var));
 194     } while (s);
 195
 196     return atoi(var);
 197 }
 198
 199
 200 int cppsetup(char *line, struct filepointer *filep, struct inclist *inc)
 201 {
 202     IfParser ip;
 203     struct parse_data pd;
 204     int val = 0;
 205
 206     pd.filep = filep;
 207     pd.inc = inc;
 208     pd.line = line;
 209     ip.funcs.handle_error = my_if_errors;
 210     ip.funcs.eval_defined = my_eval_defined;
 211     ip.funcs.eval_variable = my_eval_variable;
 212     ip.data = (char *) &pd;
 213
 214     (void) ParseIfExpression (&ip, line, &val);
 215     if (val)
 216       return IF;
 217     else
 218       return IFFALSE;
 219 }
 220 #endif /* CPP */
 221
 222 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */