1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/* $OpenBSD: db_hangman.c,v 1.32 2015/03/14 03:38:46 jsg Exp $ */
/*
* Copyright (c) 1996 Theo de Raadt, Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_output.h>
#include <dev/cons.h>
#define ABC_ISCLR(c) sabc->abc[(c)-'a']==0
#define ABC_ISWRONG(c) sabc->abc[(c)-'a']=='_'
#define ABC_SETWRONG(c) (sabc->abc[(c)-'a']='_')
#define ABC_SETRIGHT(c) (sabc->abc[(c)-'a']='+')
#define ABC_CLR() memset(sabc->abc,0,sizeof sabc->abc)
struct _abc {
char abc[26+2]; /* for int32 alignment */
};
#define TOLOWER(c) ((c)|0x20)
#define ISLOWALPHA(c) ('a'<=(c) && (c)<='z')
#define ISALPHA(c) ISLOWALPHA(TOLOWER(c))
void db_hang(int, char *, struct _abc *);
u_long db_plays, db_guesses;
static const char hangpic[]=
"\n88888\r\n"
"9 7 6\r\n"
"97 5\r\n"
"9 423\r\n"
"9 2\r\n"
"9 1 0\r\n"
"9\r\n"
"9 ";
static const char substchar[]="\\/|\\/O|/-|";
struct db_hang_forall_arg {
int cnt;
db_sym_t sym;
};
/*
* Horrible abuse of the forall function, but we're not in a hurry.
*/
static void db_hang_forall(db_symtab_t *, db_sym_t, char *, char *, int,
void *);
static void
db_hang_forall(db_symtab_t *stab, db_sym_t sym, char *name, char *suff, int pre,
void *varg)
{
struct db_hang_forall_arg *arg = (struct db_hang_forall_arg *)varg;
if (arg->cnt-- == 0)
arg->sym = sym;
}
static __inline char *
db_randomsym(size_t *lenp)
{
extern db_symtab_t db_symtabs[];
db_symtab_t *stab;
int nsymtabs, nsyms;
char *p, *q;
struct db_hang_forall_arg dfa;
for (nsymtabs = 0; db_symtabs[nsymtabs].name != NULL; nsymtabs++)
;
if (nsymtabs == 0)
return (NULL);
stab = &db_symtabs[arc4random_uniform(nsymtabs)];
dfa.cnt = 0;
X_db_forall(stab, db_hang_forall, &dfa);
nsyms = -dfa.cnt;
if (nsyms == 0)
return (NULL);
dfa.cnt = arc4random_uniform(nsyms);
X_db_forall(stab, db_hang_forall, &dfa);
q = db_qualify(dfa.sym, stab->name);
/* don't show symtab name if there are less than 3 of 'em */
if (nsymtabs < 3)
while (*q++ != ':');
/* strlen(q) && ignoring underscores and colons */
for ((*lenp) = 0, p = q; *p; p++)
if (ISALPHA(*p))
(*lenp)++;
return (q);
}
void
db_hang(int tries, char *word, struct _abc *sabc)
{
const char *p;
int i;
int c;
#ifdef ABC_BITMASK
int m;
#endif
for (p = hangpic; *p; p++)
cnputc((*p >= '0' && *p <= '9') ? ((tries <= (*p) - '0') ?
substchar[(*p) - '0'] : ' ') : *p);
for (p = word; *p; p++) {
c = TOLOWER(*p);
cnputc(ISLOWALPHA(c) && ABC_ISCLR(c) ? '-' : *p);
}
#ifdef ABC_WRONGSTR
db_printf(" (%s)\r", ABC_WRONGSTR);
#else
db_printf(" (");
#ifdef ABC_BITMASK
m = sabc->wrong;
for (i = 'a'; i <= 'z'; ++i, m >>= 1)
if (m&1)
cnputc(i);
#else
for (i = 'a'; i <= 'z'; ++i)
if (ABC_ISWRONG(i))
cnputc(i);
#endif
db_printf(")\r");
#endif
}
void
db_hangman(db_expr_t addr, int haddr, db_expr_t count, char *modif)
{
char *word;
size_t tries;
size_t len;
struct _abc sabc[1];
int skill;
if (modif[0] != 's' || (skill = modif[1] - '0') > 9U)
skill = 3;
word = NULL;
tries = 0;
for (;;) {
if (word == NULL) {
ABC_CLR();
tries = skill + 1;
word = db_randomsym(&len);
if (word == NULL)
break;
db_plays++;
}
{
int c;
db_hang(tries, word, sabc);
c = cngetc();
c = TOLOWER(c);
if (ISLOWALPHA(c) && ABC_ISCLR(c)) {
char *p;
size_t n;
/* strchr(word,c) */
for (n = 0, p = word; *p ; p++)
if (TOLOWER(*p) == c)
n++;
if (n) {
ABC_SETRIGHT(c);
len -= n;
} else {
ABC_SETWRONG(c);
tries--;
}
}
}
if (tries && len)
continue;
if (!tries && skill > 2) {
char *p = word;
for (; *p; p++)
if (ISALPHA(*p))
ABC_SETRIGHT(TOLOWER(*p));
}
if (tries)
db_guesses++;
db_hang(tries, word, sabc);
db_printf("\nScore: %lu/%lu\n", db_plays, db_guesses);
word = NULL;
if (tries)
break;
}
}
|