mdw@git.distorted.org.uk Git - fwd/blob - scan.h

   1 /* -*-c-*-
   2  *
   3  * $Id: scan.h,v 1.1 1999/07/01 08:56:23 mdw Exp $
   4  *
   5  * Character scanners
   6  *
   7  * (c) 1999 Mark Wooding
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the `fw' port forwarder.
  13  *
  14  * `fw' is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * `fw' is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with `fw'; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: scan.h,v $
  32  * Revision 1.1  1999/07/01 08:56:23  mdw
  33  * Initial revision
  34  *
  35  */
  36
  37 #ifndef SCAN_H
  38 #define SCAN_H
  39
  40 #ifdef __cplusplus
  41   extern "C" {
  42 #endif
  43
  44 /*----- Header files ------------------------------------------------------*/
  45
  46 #include <stdio.h>
  47
  48 #include <mLib/dstr.h>
  49
  50 /*----- Data structures ---------------------------------------------------*/
  51
  52 /* --- A configuration scanner --- */
  53
  54 typedef struct scan_ops {
  55   int (*scan)(void */*p*/);             /* Character scan function */
  56   void (*unscan)(int /*ch*/, void */*p*/); /* Character pushback function */
  57 } scan_ops;
  58
  59 typedef struct scanner {
  60   scan_ops *ops;                        /* Pointer to scanner operations */
  61   const char *src;                      /* Name of this source */
  62   int line;                             /* Current line number */
  63   int t;                                /* Token type */
  64   dstr d;                               /* Current token value */
  65 } scanner;
  66
  67 /*----- Scanners provided -------------------------------------------------*/
  68
  69 /* --- The @argv@ scanner --- */
  70
  71 typedef struct scan_argvctx {
  72   scanner sc;                           /* Scanner base structure */
  73   char *p;                              /* Pointer to next character */
  74   char **pp;                            /* Pointer to next string */
  75   int ch;                               /* Pushback character */
  76 } scan_argvctx;
  77
  78 extern void scan_argvinit(scan_argvctx */*c*/, char **/*pp*/);
  79
  80 /* --- The file scanner --- */
  81
  82 typedef struct scan_filectx {
  83   scanner sc;                           /* Scanner base structure */
  84   FILE *fp;                             /* Stream pointer */
  85 } scan_filectx;
  86
  87 extern void scan_fileinit(scan_filectx */*c*/,
  88                           FILE */*fp*/, const char */*file*/);
  89
  90 /*----- That's all, folks -------------------------------------------------*/
  91
  92 #ifdef __cplusplus
  93   }
  94 #endif
  95
  96 #endif