c3761c3848
comparing to zero. - Fix fractional number exponentiation, especially for negative exponents. Obtained from: OpenBSD
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/* $FreeBSD$ */
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/* $OpenBSD: bcode.h,v 1.5 2006/01/16 08:09:25 otto Exp $ */
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/*
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* Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <openssl/bn.h>
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struct number {
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BIGNUM *number;
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u_int scale;
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};
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enum stacktype {
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BCODE_NONE,
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BCODE_NUMBER,
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BCODE_STRING
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};
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enum bcode_compare {
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BCODE_EQUAL,
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BCODE_NOT_EQUAL,
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BCODE_LESS,
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BCODE_NOT_LESS,
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BCODE_GREATER,
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BCODE_NOT_GREATER
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};
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struct array;
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struct value {
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union {
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struct number *num;
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char *string;
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} u;
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struct array *array;
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enum stacktype type;
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};
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struct array {
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struct value *data;
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size_t size;
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};
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struct stack {
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struct value *stack;
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ssize_t size;
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ssize_t sp;
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};
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struct source;
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struct vtable {
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int (*readchar)(struct source *);
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void (*unreadchar)(struct source *);
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char *(*readline)(struct source *);
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void (*free)(struct source *);
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};
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struct source {
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union {
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struct {
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u_char *buf;
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size_t pos;
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} string;
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FILE *stream;
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} u;
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struct vtable *vtable;
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int lastchar;
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};
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void init_bmachine(bool);
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void reset_bmachine(struct source *);
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u_int bmachine_scale(void);
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void scale_number(BIGNUM *, int);
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void normalize(struct number *, u_int);
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void eval(void);
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void pn(const char *, const struct number *);
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void pbn(const char *, const BIGNUM *);
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void negate(struct number *);
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void split_number(const struct number *, BIGNUM *, BIGNUM *);
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void bmul_number(struct number *, struct number *,
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struct number *, u_int);
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