HGKeeper

* For copyright info, see mit-sipb-copyright.h.

#include <sysdep.h>

#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_";

/* Prototypes for -Wmissing-prototypes */

const char * error_table_name(int num);

const char * error_table_name_r(int num, char *buf);

const char * error_table_name_r(int num, char *buf)

{

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);

}

const char * error_table_name(int num)

{

static char buf[6];

return(error_table_name_r(num, buf));

}