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/*
* Copyright 1997 by Massachusetts Institute of Technology
*
* Copyright 1987, 1988 by MIT Student Information Processing Board
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for any purpose and without fee is
* hereby granted, provided that the above copyright notice
* appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation,
* and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
* used in advertising or publicity pertaining to distribution
* of the software without specific, written prior permission.
* M.I.T. and the M.I.T. S.I.P.B. make no representations about
* the suitability of this software for any purpose. It is
* provided "as is" without express or implied warranty.
*/
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <string.h>
#include "com_err.h"
#include "error_table.h"
#if defined(_MSDOS) || defined(_WIN32)
#define HAVE_STRERROR
#endif
#ifdef _MACINTOSH
#define sys_nerr 100
#endif
#if !defined(HAVE_STRERROR) && !defined(SYS_ERRLIST_DECLARED)
extern char const * const sys_errlist[];
extern const int sys_nerr;
#endif
static char buffer[ET_EBUFSIZ];
#ifndef unix
static struct et_list * _et_list = (struct et_list *) NULL;
#else
/* Old interface compatibility */
struct et_list * _et_list = (struct et_list *) NULL;
#endif
KRB5_DLLIMP const char FAR * KRB5_CALLCONV error_message(code)
long code;
{
unsigned long offset;
unsigned long l_offset;
struct et_list *et;
unsigned long table_num;
int started = 0;
unsigned int divisor = 100;
char *cp;
l_offset = (unsigned long)code & ((1<<ERRCODE_RANGE)-1);
offset = l_offset;
table_num = (unsigned long)code - l_offset;
if (!table_num) {
if (code == 0)
goto oops;
#ifdef HAVE_STRERROR
cp = strerror(offset);
if (cp)
return cp;
goto oops;
#else
#ifdef HAVE_SYS_ERRLIST
if (offset < sys_nerr)
return(sys_errlist[offset]);
else
goto oops;
#else
goto oops;
#endif /* HAVE_SYS_ERRLIST */
#endif /* HAVE_STRERROR */
}
et = _et_list;
while (et) {
if (et->table->base == table_num) {
/* This is the right table */
if (et->table->n_msgs <= offset)
break;
return(et->table->msgs[offset]);
}
et = et->next;
}
#if defined(_MSDOS) || defined(_WIN32)
/*
* WinSock errors exist in the 10000 and 11000 ranges
* but might not appear if WinSock is not initialized
*/
if (code < 12000) {
table_num = 0;
offset = code;
divisor = 10000;
}
#endif
#ifdef _WIN32
{
LPVOID msgbuf;
if (! FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL /* lpSource */,
(DWORD) code,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &msgbuf,
(DWORD) 0 /*sizeof(buffer)*/,
NULL /* va_list */ )) {
/*
* WinSock errors exist in the 10000 and 11000 ranges
* but might not appear if WinSock is not initialized
*/
if (code < 12000) {
table_num = 0;
offset = code;
divisor = 10000;
}
goto oops;
} else {
strncpy(buffer, msgbuf, sizeof(buffer));
buffer[sizeof(buffer)-1] = '\0';
cp = buffer + strlen(buffer) - 1;
if (*cp == '\n') *cp-- = '\0';
if (*cp == '\r') *cp-- = '\0';
if (*cp == '.') *cp-- = '\0';
LocalFree(msgbuf);
return buffer;
}
}
#endif
oops:
cp = buffer;
strcpy(cp, "Unknown code ");
cp += sizeof("Unknown code ") - 1;
if (table_num) {
error_table_name_r(table_num, cp);
while (*cp)
cp++;
*cp++ = ' ';
}
while (divisor > 1) {
if (started || offset >= divisor) {
*cp++ = '0' + offset / divisor;
offset %= divisor;
started++;
}
divisor /= 10;
}
*cp++ = '0' + offset;
*cp = '\0';
return(buffer);
}
KRB5_DLLIMP errcode_t KRB5_CALLCONV
add_error_table(et)
const struct error_table FAR * et;
{
struct et_list *el = _et_list;
#ifdef _MSDOS
static struct et_list etl[32];
static int etl_used = 0;
#endif
while (el) {
if (el->table->base == et->base)
return EEXIST;
el = el->next;
}
#ifdef _MSDOS
/*
* Win16 applications cannot call malloc while the DLL is being
* initialized... To get around this, we pre-allocate an array
* sufficient to hold several error tables.
*/
if (etl_used < sizeof(etl)/sizeof(struct et_list))
el = &etl[etl_used++];
else
#endif
if (!(el = (struct et_list *)malloc(sizeof(struct et_list))))
return ENOMEM;
el->table = et;
el->next = _et_list;
_et_list = el;
return 0;
}
KRB5_DLLIMP errcode_t KRB5_CALLCONV
remove_error_table(et)
const struct error_table FAR * et;
{
struct et_list *el = _et_list;
struct et_list *el2 = 0;
while (el) {
if (el->table->base == et->base) {
if (el2) /* Not the beginning of the list */
el2->next = el->next;
else
_et_list = el->next;
(void) free(el);
return 0;
}
el2 = el;
el = el->next;
}
return ENOENT;
}
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