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fgen.h revision 1.2 
      1 /*
      2  * fgen.h -- stuff for the fcode tokenizer.
      3  *
      4  * Copyright (c) 1998 Eduardo Horvath.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Eduardo Horvath.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software withough specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /* Type of a Cell */
     34 typedef long Cell;
     35 
     36 /* Token from the scanner. */
     37 struct tok {
     38 	int type;
     39 	char *text;
     40 };
     41 
     42 #define TOKEN struct tok
     43 #define YY_DECL TOKEN* yylex __P((void))
     44 
     45 #define FCODE	0xF00DBABE
     46 #define MACRO	0xFEEDBABE
     47 
     48 /* Defined fcode and string. */
     49 struct fcode {
     50 	char *name;
     51 	long num;
     52 	int type;
     53 	struct fcode *l;
     54 	struct fcode *r;
     55 };
     56 
     57 /* macro instruction as separate words */
     58 struct macro {
     59 	char *name;
     60 	char *equiv;
     61 	int type;
     62 	struct macro *l;
     63 	struct macro *r;
     64 };
     65 
     66 /*
     67  * FCode header -- assumes big-endian machine,
     68  *	otherwise the bits need twiddling.
     69  */
     70 struct fcode_header {
     71 	char	header;
     72 	char	format;
     73 	short	checksum;
     74 	int	length;
     75 };
     76 
     77 /* Tokenizer tokens */
     78 enum toktypes {
     79 	TOK_OCTAL = 8,
     80 	TOK_DECIMAL = 10,
     81 	TOK_HEX = 16,
     82 
     83 	TOK_NUMBER,
     84 	TOK_STRING_LIT,
     85 	TOK_C_LIT,
     86 	TOK_PSTRING,
     87 	TOK_TOKENIZE,
     88 	TOK_COMMENT,
     89 	TOK_ENDCOMMENT,
     90 	TOK_COLON,
     91 	TOK_SEMICOLON,
     92 	TOK_TOSTRING,
     93 
     94 	/* These are special */
     95 	TOK_AGAIN,
     96 	TOK_ALIAS,
     97 	TOK_GETTOKEN,
     98 	TOK_ASCII,
     99 	TOK_BEGIN,
    100 	TOK_BUFFER,
    101 	TOK_CASE,
    102 	TOK_CONSTANT,
    103 	TOK_CONTROL,
    104 	TOK_CREATE,
    105 	TOK_DEFER,
    106 	TOK_DO,
    107 	TOK_ELSE,
    108 	TOK_ENDCASE,
    109 	TOK_ENDOF,
    110 	TOK_EXTERNAL,
    111 	TOK_FIELD,
    112 	TOK_HEADERLESS,
    113 	TOK_HEADERS,
    114 	TOK_IF,
    115 	TOK_LEAVE,
    116 	TOK_LOOP,
    117 	TOK_OF,
    118 	TOK_REPEAT,
    119 	TOK_THEN,
    120 	TOK_TO,
    121 	TOK_UNTIL,
    122 	TOK_VALUE,
    123 	TOK_VARIABLE,
    124 	TOK_WHILE,
    125 	TOK_OFFSET16,
    126 
    127 	/* Tokenizer directives */
    128 	TOK_BEGTOK,
    129 	TOK_EMIT_BYTE,
    130 	TOK_ENDTOK,
    131 	TOK_FLOAD,
    132 
    133 	TOK_OTHER
    134 };
    135