fatbase

portable OpenBSD tools
git clone git://git.2f30.org/fatbase
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bcode.h (2195B)

      1 /*	$OpenBSD: bcode.h,v 1.7 2012/11/07 11:06:14 otto Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
      5  *
      6  * Permission to use, copy, modify, and distribute this software for any
      7  * purpose with or without fee is hereby granted, provided that the above
      8  * copyright notice and this permission notice appear in all copies.
      9  *
     10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     17  */
     18 
     19 #include <sys/types.h>
     20 #include <openssl/bn.h>
     21 
     22 
     23 struct number {
     24 	BIGNUM	*number;
     25 	u_int	scale;
     26 };
     27 
     28 enum stacktype {
     29 	BCODE_NONE,
     30 	BCODE_NUMBER,
     31 	BCODE_STRING
     32 };
     33 
     34 enum bcode_compare {
     35 	BCODE_EQUAL,
     36 	BCODE_NOT_EQUAL,
     37 	BCODE_LESS,
     38 	BCODE_NOT_LESS,
     39 	BCODE_GREATER,
     40 	BCODE_NOT_GREATER
     41 };
     42 
     43 struct array;
     44 
     45 struct value {
     46 	union {
     47 		struct number	*num;
     48 		char		*string;
     49 	} u;
     50 	struct array	*array;
     51 	enum stacktype	type;
     52 };
     53 
     54 struct array {
     55 	struct value	*data;
     56 	size_t		size;
     57 };
     58 
     59 struct stack {
     60 	struct value	*stack;
     61 	ssize_t		sp;
     62 	size_t		size;
     63 };
     64 
     65 struct source;
     66 
     67 struct vtable {
     68 	int	(*readchar)(struct source *);
     69 	void	(*unreadchar)(struct source *);
     70 	char	*(*readline)(struct source *);
     71 	void	(*free)(struct source *);
     72 };
     73 
     74 struct source {
     75 	struct vtable	*vtable;
     76 	union {
     77 			FILE *stream;
     78 			struct {
     79 				u_char *buf;
     80 				size_t pos;
     81 			} string;
     82 	} u;
     83 	int		lastchar;
     84 };
     85 
     86 void			init_bmachine(bool);
     87 void			reset_bmachine(struct source *);
     88 u_int			bmachine_scale(void);
     89 void			scale_number(BIGNUM *, int);
     90 void			normalize(struct number *, u_int);
     91 void			eval(void);
     92 void			pn(const char *, const struct number *);
     93 void			pbn(const char *, const BIGNUM *);
     94 void			negate(struct number *);
     95 void			split_number(const struct number *, BIGNUM *, BIGNUM *);
     96 void			bmul_number(struct number *, struct number *,
     97 			    struct number *, u_int scale);