comparison: core/protocols/zephyr/et_name.c
core/protocols/zephyr/et_name.c
- changeset 14253
- b63ebf84c42b
- parent 12424
- af82a40f2488
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| 14252:d10dda2777a9 | 14253:b63ebf84c42b |
|---|---|
| 1 /* | |
| 2 * Copyright 1987 by MIT Student Information Processing Board | |
| 3 * | |
| 4 * For copyright info, see mit-sipb-copyright.h. | |
| 5 */ | |
| 6 | |
| 7 #include <sysdep.h> | |
| 8 | |
| 9 | |
| 10 #define ERRCODE_RANGE 8 /* # of bits to shift table number */ | |
| 11 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */ | |
| 12 | |
| 13 | |
| 14 static const char char_set[] = | |
| 15 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; | |
| 16 | |
| 17 /* Prototypes for -Wmissing-prototypes */ | |
| 18 const char * error_table_name(int num); | |
| 19 const char * error_table_name_r(int num, char *buf); | |
| 20 | |
| 21 const char * error_table_name_r(int num, char *buf) | |
| 22 { | |
| 23 int ch; | |
| 24 int i; | |
| 25 char *p; | |
| 26 | |
| 27 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */ | |
| 28 p = buf; | |
| 29 num >>= ERRCODE_RANGE; | |
| 30 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */ | |
| 31 num &= 077777777; | |
| 32 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */ | |
| 33 for (i = 4; i >= 0; i--) { | |
| 34 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1); | |
| 35 if (ch != 0) | |
| 36 *p++ = char_set[ch-1]; | |
| 37 } | |
| 38 *p = '\0'; | |
| 39 return(buf); | |
| 40 } | |
| 41 | |
| 42 const char * error_table_name(int num) | |
| 43 { | |
| 44 static char buf[6]; | |
| 45 | |
| 46 return(error_table_name_r(num, buf)); | |
| 47 } | |
| 48 |
