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add error_table_name

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@4835 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1998-05-02 20:12:59 +00:00
parent 058476c9ce
commit d49dfdd8b6
1 changed files with 30 additions and 0 deletions
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30
lib/com_err/com_err.c
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@@ -135,3 +135,33 @@ reset_com_err_hook (void)
{
return set_com_err_hook(NULL);
}
#define ERRCODE_RANGE 8 /* # of bits to shift table number */
#define BITS_PER_CHAR 6 /* # bits to shift per character in name */
static const char char_set[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
static char buf[6];
const char *
error_table_name(int num)
{
int ch;
int i;
char *p;
/* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
p = buf;
num >>= ERRCODE_RANGE;
/* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
num &= 077777777;
/* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
for (i = 4; i >= 0; i--) {
ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
if (ch != 0)
*p++ = char_set[ch-1];
}
*p = '\0';
return(buf);
}