WINGs/menuparser.h

   1 /* menuparser.h
   2  *
   3  *  Copyright (c) 2012 Christophe Curis
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef _MENUPARSER_H_INCLUDED
  21 #define _MENUPARSER_H_INCLUDED
  22
  23 /*
  24  * This file is not part of WINGs public API
  25  *
  26  * It defines internal things for the Menu Parser, the public API is
  27  * located in WINGs/WUtil.h as usual
  28  */
  29
  30 #define MAXLINE              1024
  31 #define MAX_NESTED_INCLUDES  16  // To avoid infinite includes case
  32 #define MAX_NESTED_MACROS    24  // To avoid infinite loop inside macro expansions
  33 #define MAX_MACRO_ARG_COUNT  32  // Limited by design
  34
  35 typedef struct w_parser_macro WParserMacro;
  36
  37 typedef void WParserMacroFunction(WParserMacro *this, WMenuParser parser);
  38
  39 struct w_menu_parser {
  40         WMenuParser include_file;
  41         WMenuParser parent_file;
  42         const char *include_default_paths;
  43         const char *file_name;
  44         FILE *file_handle;
  45         int line_number;
  46         WParserMacro *macros;
  47         struct {
  48                 /* Conditional text parsing is implemented using a stack of the
  49                         skip states for each nested #if */
  50                 int depth;
  51                 struct {
  52                         Bool skip;
  53                         char name[8];
  54                         int line;
  55                 } stack[32];
  56         } cond;
  57         char *rd;
  58         char line_buffer[MAXLINE];
  59 };
  60
  61 struct w_parser_macro {
  62         WParserMacro *next;
  63         char name[64];
  64         WParserMacroFunction *function;
  65         int arg_count;
  66 #ifdef DEBUG
  67         int usage_count;
  68 #endif
  69         unsigned char value[MAXLINE * 4];
  70 };
  71
  72 Bool menu_parser_skip_spaces_and_comments(WMenuParser parser);
  73
  74 void menu_parser_register_preset_macros(WMenuParser parser);
  75
  76 void menu_parser_define_macro(WMenuParser parser);
  77
  78 void menu_parser_free_macros(WMenuParser parser);
  79
  80 WParserMacro *menu_parser_find_macro(WMenuParser parser, const char *name);
  81
  82 void menu_parser_expand_macro(WMenuParser parser, WParserMacro *macro);
  83
  84 int isnamechr(char ch); // Check if char is valid character for a macro name
  85
  86 #endif /* _MENUPARSER_H_INCLUDED */