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This adds support for defining new macros, with or without parameters, which when found afterwards in the text are replaced by their definition. The complex analysis for arguments replacement is done at macro definition time, so it is done only once and the macro expansion will be fast. The macro-related functions have been placed in their own file because it is quite a complex task and we do not want filesize to explode, it is always better to keep things human-sized.
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* menuparser.h
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*
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* Copyright (c) 2012 Christophe Curis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _MENUPARSER_H_INCLUDED
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#define _MENUPARSER_H_INCLUDED
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/*
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* This file is not part of WINGs public API
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*
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* It defines internal things for the Menu Parser, the public API is
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* located in WINGs/WUtil.h as usual
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*/
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#define MAXLINE 1024
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#define MAX_NESTED_INCLUDES 16 // To avoid infinite includes case
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#define MAX_NESTED_MACROS 24 // To avoid infinite loop inside macro expansions
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#define MAX_MACRO_ARG_COUNT 32 // Limited by design
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typedef struct w_parser_macro WParserMacro;
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typedef void WParserMacroFunction(WParserMacro *this, WMenuParser parser);
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struct w_menu_parser {
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WMenuParser include_file;
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WMenuParser parent_file;
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const char *include_default_paths;
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const char *file_name;
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FILE *file_handle;
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int line_number;
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WParserMacro *macros;
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char *rd;
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char line_buffer[MAXLINE];
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};
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struct w_parser_macro {
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WParserMacro *next;
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char name[64];
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WParserMacroFunction *function;
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int arg_count;
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#ifdef DEBUG
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int usage_count;
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#endif
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unsigned char value[MAXLINE * 4];
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};
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Bool menu_parser_skip_spaces_and_comments(WMenuParser parser);
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void menu_parser_define_macro(WMenuParser parser);
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void menu_parser_free_macros(WMenuParser parser);
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WParserMacro *menu_parser_find_macro(WMenuParser parser, const char *name);
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void menu_parser_expand_macro(WMenuParser parser, WParserMacro *macro,
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char *write_buf, int write_buf_size);
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int isnamechr(char ch); // Check if char is valid character for a macro name
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#endif /* _MENUPARSER_H_INCLUDED */
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