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Annotation of src/usr.bin/dc/bcode.h, Revision 1.2

1.2     ! otto        1: /*     $OpenBSD$       */
        !             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:
1.1       otto       19: #include <sys/types.h>
                     20: #include <ssl/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:        int             sp;
                     62:        int             size;
                     63: };
                     64:
                     65: struct source;
                     66:
                     67: struct vtable {
                     68:        int     (*readchar)(struct source *);
                     69:        int     (*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(void);
                     87: void                   reset_bmachine(struct source *);
                     88: void                   scale_number(BIGNUM *, int);
                     89: void                   normalize(struct number *, u_int);
                     90: void                   eval(void);
                     91: void                   pn(const char *, const struct number *);
                     92: void                   pbn(const char *, const BIGNUM *);
                     93: void                   negate(struct number *);
                     94: void                   split_number(const struct number *, BIGNUM *, BIGNUM *);
                     95: void                   bmul_number(struct number *, struct number *,
                     96:                            struct number *);
                     97:
                     98: extern BIGNUM          zero;