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44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
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/*
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* Copyright 1987 by MIT Student Information Processing Board
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*
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* For copyright info, see mit-sipb-copyright.h.
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*/
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#include "error_table.h"
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#include "mit-sipb-copyright.h"
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#include "internal.h"
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#ifndef lint
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static const char copyright[] =
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"Copyright 1987,1988 by Student Information Processing Board, Massachusetts Institute of Technology";
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static const char rcsid_et_name_c[] =
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"$Header: et_name.c,v 1.7 89/01/01 06:14:56 raeburn Exp $";
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#endif
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static const char char_set[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
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static char buf[6];
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const char * error_table_name(num)
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int num;
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{
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int ch;
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int i;
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char *p;
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/* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
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p = buf;
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num >>= ERRCODE_RANGE;
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/* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
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num &= 077777777;
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/* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
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for (i = 4; i >= 0; i--) {
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ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
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if (ch != 0)
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*p++ = char_set[ch-1];
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}
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*p = '\0';
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return(buf);
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}
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