projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 47870e12 | 1 | /* |
| d66c7090 KB |
2 | * Copyright (c) 1988, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 47870e12 KB |
4 | * |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Guy Harris. | |
| 7 | * | |
| a6547b1d | 8 | * %sccs.include.redist.c% |
| 47870e12 KB |
9 | */ |
| 10 | ||
| 11 | #ifndef lint | |
| d66c7090 KB |
12 | static char copyright[] = |
| 13 | "@(#) Copyright (c) 1988, 1993\n\ | |
| 14 | The Regents of the University of California. All rights reserved.\n"; | |
| 47870e12 KB |
15 | #endif /* not lint */ |
| 16 | ||
| 17 | #ifndef lint | |
| d66c7090 | 18 | static char sccsid[] = "@(#)ching.cno.c 8.1 (Berkeley) %G%"; |
| 47870e12 KB |
19 | #endif /* not lint */ |
| 20 | ||
| 21 | /* | |
| 22 | * cno - Read a question, cast a change, and output the line values to the | |
| 23 | * standard output for processing by "phx". | |
| 24 | */ | |
| 25 | #include <stdio.h> | |
| 26 | #include "ching.h" | |
| 27 | ||
| 28 | long now; /* current time */ | |
| 29 | ||
| 30 | unsigned seed; /* seed for random number generator */ | |
| 31 | unsigned getrand(); | |
| 32 | ||
| 33 | char *change(); | |
| 34 | char string[6+1]; /* where the actual change string is put */ | |
| 35 | ||
| 36 | int table[2][2][2] = { | |
| 37 | { { OYIN, YYANG,}, { YYANG, YYIN,} }, | |
| 38 | { { YYANG, YYIN,}, { YYIN, OYANG,} }, | |
| 39 | }; | |
| 40 | ||
| 41 | main() | |
| 42 | { | |
| 43 | FILE *logf; | |
| 44 | ||
| 45 | time(&now); | |
| 46 | seed = (int)now + getquest() + getgid() + getuid() + getpid(); /* randomize */ | |
| 47 | printf("%s\n", change()); | |
| 47870e12 KB |
48 | } |
| 49 | ||
| 50 | /* | |
| 51 | * Hash the question by adding all the characters together. | |
| 52 | */ | |
| 53 | int | |
| 54 | getquest() | |
| 55 | { | |
| 56 | int result; | |
| 57 | register int c; | |
| 58 | ||
| 59 | result = 0; | |
| 60 | while ((c = getchar()) != EOF) | |
| 61 | result += c; | |
| 62 | return(result); | |
| 63 | } | |
| 64 | ||
| 65 | /* | |
| 66 | * Get a set of six lines making up a change. | |
| 67 | */ | |
| 68 | char * | |
| 69 | change() | |
| 70 | { | |
| 71 | register int i; | |
| 72 | ||
| 73 | for (i = 0; i < 6; i++) | |
| 74 | string[i] = table[getrnum()&01][getrnum()&01][getrnum()&01] + '0'; | |
| 75 | string[i] = '\0'; | |
| 76 | return(string); | |
| 77 | } | |
| 78 | ||
| 79 | /* | |
| 80 | * Get a number more random than what getrand() gives. | |
| 81 | */ | |
| 82 | getrnum() | |
| 83 | { | |
| 84 | return((getrand())>>(getrand()%17)); | |
| 85 | } | |
| 86 | ||
| 87 | /* | |
| 88 | * Get a random number. | |
| 89 | */ | |
| 90 | unsigned | |
| 91 | getrand() | |
| 92 | { | |
| 93 | return(seed = (seed*13077) + 6925); | |
| 94 | } |