mach_error_string.c [plain text]
#include <limits.h>
#include <mach/boolean.h>
#include <mach/error.h>
#include <mach/mach_error.h>
#include "errorlib.h"
#include "externs.h"
static void do_compat(mach_error_t *);
static void
do_compat(mach_error_t *org_err)
{
mach_error_t err = *org_err;
if ((-200 < err) && (err <= -100))
err = -(err + 100) | IPC_SEND_MOD;
else if ((-300 < err) && (err <= -200))
err = -(err + 200) | IPC_RCV_MOD;
else if ((-400 < err) && (err <= -300))
err = -(err + 300) | MACH_IPC_MIG_MOD;
else if ((1000 <= err) && (err < 1100))
err = (err - 1000) | SERV_NETNAME_MOD;
else if ((1600 <= err) && (err < 1700))
err = (err - 1600) | SERV_ENV_MOD;
else if ((27600 <= err) && (err < 27700))
err = (err - 27600) | SERV_EXECD_MOD;
*org_err = err;
}
static int
err_sparse_mapit(int old, const struct error_sparse_map *map_table, int mapcnt)
{
boolean_t found = FALSE;
int ret = 0, i;
for (i = 0; i < mapcnt; i++) {
struct error_sparse_map entry = map_table[i];
if (entry.start <= old && old <= entry.end) {
ret += old - entry.start;
found = TRUE;
break;
}
ret += entry.end - entry.start + 1;
}
return (found)? ret : INT_MAX;
}
char *
mach_error_type(mach_error_t err)
{
const struct error_system *sys_p;
int sub, system;
do_compat( &err );
system = err_get_system(err);
sys_p = &_mach_errors[system];
sub = err_get_sub(err);
if (system <= err_max_system && sys_p->map_table)
sub = err_sparse_mapit(sub, sys_p->map_table, sys_p->map_count);
if (system > err_max_system || sub >= sys_p->max_sub)
return((char *)"(?/?)");
return (char *) (sys_p->subsystem[sub].subsys_name);
}
boolean_t mach_error_full_diag = FALSE;
__private_extern__ char *
mach_error_string_int(mach_error_t err, boolean_t *diag)
{
const struct error_system *sys_p;
const struct error_subsystem *sub_p;
int sub, system, code;
do_compat( &err );
system = err_get_system(err);
sys_p = &_mach_errors[system];
sub = err_get_sub(err);
code = err_get_code(err);
*diag = TRUE;
if (system > err_max_system)
return((char *)"(?/?) unknown error system");
else if (sys_p->map_table)
sub = err_sparse_mapit(sub, sys_p->map_table, sys_p->map_count);
if (sub >= sys_p->max_sub)
return((char *)sys_p->bad_sub);
sub_p = &sys_p->subsystem[sub];
if (sub_p->map_table)
code = err_sparse_mapit(code, sub_p->map_table, sub_p->map_count);
if (code >= sub_p->max_code)
return ((char *)NO_SUCH_ERROR);
*diag = mach_error_full_diag;
return( (char *)sub_p->codes[code] );
}
char *
mach_error_string(mach_error_t err)
{
boolean_t diag;
return mach_error_string_int( err, &diag );
}