yasm/libyasm/parser.h

/* $Id: parser.h,v 1.4 2001/09/16 04:49:46 peter Exp $
 * Parser module interface header file
 *
 *  Copyright (C) 2001  Peter Johnson
 *
 *  This file is part of YASM.
 *
 *  YASM is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  YASM is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef YASM_PARSER_H
#define YASM_PARSER_H

/* Interface to the parser module(s) -- the "front end" of the assembler */
typedef struct parser_s {
    /* one-line description of the parser */
    char *name;

    /* keyword used to select parser on the command line */
    char *keyword;

    /* NULL-terminated list of preprocessors that are valid to use with this
     * parser.  The raw preprocessor (raw_preproc) should always be in this
     * list so it's always possible to have no preprocessing done.
     */
    preproc **preprocs;

    /* Current preprocessor (set to the default at compile time) */
    preproc *current_pp;

    /* Main entrance point for the parser.
     *
     * The parser needs access to both the object format module (for format-
     * specific directives and segment names), and the preprocessor
     * (it uses current_pp as set either at compile-time or by parser_setpp).
     *
     * This function also takes the FILE * to the initial starting file, but
     * not the filename (which is in a global variable and is not
     * parser-specific).
     *
     * This function returns the starting section of a linked list of sections
     * (whatever was in the file).
     */
    sectionhead *(*doparse) (struct parser_s *p, objfmt *of, FILE *f);
} parser;

/* Generic functions for all parsers - implemented in src/parser.c */

/* Sets current_pp within p by searching the preprocs list for a preproc
 * matching pp_keyword.  Returns nonzero if no match was found.
 */
int parser_setpp(parser *p, const char *pp_keyword);

/* Lists preprocessors available for p.  Calls printfunc with the name
 * and keyword of each available preprocessor.
 */
void parser_listpp(parser *p,
		   void (*printfunc) (const char *name, const char *keyword));

/* Finds a parser based on its keyword.  Returns NULL if no match was found.
 */
parser *find_parser(const char *keyword);

/* Lists all available parsers.  Calls printfunc with the name and keyword
 * of each available parser.
 */
void list_parsers(void (*printfunc) (const char *name, const char *keyword));

/* Available parsers */
extern parser nasm_parser;

#endif