gambas-source-code/main/gbx/gb_error.c

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/***************************************************************************
gb_error.c
Errors management routines
(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
***************************************************************************/
#define __GB_ERROR_C
#include "gb_common.h"
#include <stdarg.h>
#include <ctype.h>
/* In OpenBSD, strcpy is replaced with strlcpy, which is defined in string.h header */
#ifdef OS_OPENBSD
#include <string.h>
#endif
#include "gb_buffer.h"
#include "gb_error.h"
#include "gbx_debug.h"
#include "gbx_exec.h"
#include "gbx_api.h"
PUBLIC ERROR_INFO ERROR_info = { 0 };
static int _lock = 0;
static const char *_message[64] =
{
/* 0 E_UNKNOWN */ "Unknown error",
/* 1 E_MEMORY */ "Out of memory",
/* 2 E_CLASS */ "Cannot load class '&1': &2&3",
/* 3 E_STACK */ "Stack overflow",
/* 4 E_NEPARAM */ "Not enough arguments",
/* 5 E_TMPARAM */ "Too many arguments",
/* 6 E_TYPE */ "Type mismatch: wanted &1, got &2 instead",
/* 7 E_OVERFLOW */ "Overflow",
/* 8 E_ILLEGAL */ "Illegal instruction",
/* 9 E_NFUNC */ "Not a function",
/* 10 E_CSTATIC */ "Class '&1' is not creatable",
/* 11 E_NSYMBOL */ "Unknown symbol '&1' in class '&2'",
/* 12 E_NOBJECT */ "Not an object",
/* 13 E_NULL */ "Null object",
/* 14 E_STATIC */ "'&1.&2' is static",
/* 15 E_NREAD */ "'&1.&2' is write only",
/* 16 E_NWRITE */ "'&1.&2' is read only",
/* 17 E_NPROPERTY */ "'&1.&2' is not a property",
/* 18 E_NRETURN */ "No return value",
/* 19 E_MATH*/ "Mathematic error",
/* 20 E_ARG */ "Bad argument",
/* 21 E_BOUND */ "Out of bounds",
/* 22 E_NDIM */ "Bad number of dimensions",
/* 23 E_NARRAY */ "Not an array",
/* 24 E_MAIN */ "No startup method",
/* 25 E_NNEW */ "No instanciation method",
/* 26 E_ZERO */ "Division by zero",
/* 27 E_LIBRARY */ "Cannot load component '&1': &2",
/* 28 E_EVENT */ "Bad event handler in &1.&2(): &3",
/* 29 E_IOBJECT */ "Invalid object",
/* 30 E_ENUM */ "Not an enumeration",
/* 31 E_UCONV */ "Unsupported string conversion",
/* 32 E_CONV */ "Bad string conversion",
/* 33 E_DATE */ "Invalid date",
/* 34 E_BADPATH */ "Invalid path",
/* 35 E_OPEN */ "Cannot open file '&1': &2",
/* 36 E_PROJECT */ "Bad project file: line &1: &2",
/* 37 E_FULL */ "Device is full",
/* 38 E_EXIST */ "File already exists", /* &1 */
/* 39 E_EOF */ "End of file",
/* 40 E_FORMAT */ "Bad format string",
/* 41 E_DYNAMIC */ "'&1.&2' is not static",
/* 42 E_SYSTEM */ "System error. &1",
/* 43 E_ACCESS */ "Access forbidden",
/* 44 E_TOOLONG */ "File name is too long",
/* 45 E_NEXIST */ "File or directory does not exist", /* &1 */
/* 46 E_DIR */ "File is a directory", /* &1 */
/* 47 E_READ */ "Read error",
/* 48 E_WRITE */ "Write error",
/* 49 E_NDIR */ "Not a directory: &1",
/* 50 E_REGEXP */ "Bad regular expression: &1",
/* 51 E_ARCH */ "Bad archive: &1: &2",
/* 52 E_REGISTER */ "Cannot register class '&1'",
/* 53 E_CLOSED */ "Stream is closed",
/* 54 E_VIRTUAL */ "Bad use of virtual class",
/* 55 E_STOP */ "STOP instruction encountered",
/* 56 E_STRING */ "Too many simultaneous new strings",
/* 57 E_EVAL */ "Bad expression: &1",
/* 58 E_LOCK */ "File is locked",
/* 59 E_PARENT */ "No parent class",
/* 60 E_EXTLIB */ "Cannot find dynamic library '&1': &2",
/* 61 E_EXTSYM */ "Cannot find symbol '&2' in dynamic library '&1'",
NULL
};
static ERROR_CONTEXT *_current = NULL;
PUBLIC void ERROR_lock()
{
_lock++;
}
PUBLIC void ERROR_unlock()
{
_lock--;
}
static void ERROR_reset()
{
ERROR_info.code = 0;
DEBUG_free_backtrace(&ERROR_info.backtrace);
}
PUBLIC void ERROR_clear()
{
if (_lock)
return;
ERROR_reset();
}
PUBLIC void ERROR_enter(ERROR_CONTEXT *err)
{
CLEAR(err);
err->prev = _current;
_current = err;
}
PUBLIC void ERROR_leave(ERROR_CONTEXT *err)
{
if (err->prev != ERROR_LEAVE_DONE)
{
_current = err->prev;
err->prev = ERROR_LEAVE_DONE;
}
}
PUBLIC const char *ERROR_get(void)
{
/*
if (code > 0 && code < 256)
return strerror(code);
else
return ERROR_Message[code - 256];
*/
return strerror(errno);
}
PUBLIC void ERROR_define(const char *pattern, char *arg[])
{
int n;
uchar c;
boolean subst;
void _add_char(uchar c)
{
if (n >= MAX_ERROR_MSG)
return;
if (c && c < ' ' && c != '\n')
c = ' ';
ERROR_info.msg[n++] = c;
}
void _add_string(const char *s)
{
if (!s)
s = "";
while (*s)
{
_add_char(*s);
s++;
}
}
ERROR_clear();
if ((long)pattern >= 0 && (long)pattern < 256)
{
ERROR_info.code = (long)pattern;
pattern = _message[(long)pattern];
}
else if ((long)pattern == E_ABORT)
{
ERROR_info.code = E_ABORT;
pattern = "";
}
else
ERROR_info.code = E_CUSTOM;
n = 0;
if (arg)
{
subst = FALSE;
for (;;)
{
c = *pattern++;
if (c == 0)
break;
if (subst)
{
if (c >= '1' && c <= '4')
_add_string(arg[c - '1']);
else
{
_add_char('&');
_add_char(c);
}
subst = FALSE;
}
else
{
if (c == '&')
subst = TRUE;
else
_add_char(c);
}
}
}
else
{
_add_string(pattern);
}
_add_char(0);
ERROR_info.cp = CP;
ERROR_info.fp = FP;
ERROR_info.pc = PC;
if (EXEC_debug || (CP && CP->debug))
{
DEBUG_free_backtrace(&ERROR_info.backtrace);
ERROR_info.backtrace = DEBUG_backtrace();
}
}
PUBLIC void PROPAGATE()
{
ERROR_CONTEXT *err;
/*
if (_must_free_index)
{
for (i = 0; i < _must_free_index; i++)
OBJECT_UNREF(&_must_free[i], "PROPAGATE");
_must_free_index = 0;
}
*/
if (_current == NULL)
ERROR_panic("Cannot propagate error. No error handler.");
err = _current;
ERROR_leave(_current);
longjmp(err->env, 1);
}
/*
PUBLIC void ERROR(long code, ...)
{
va_list args;
int i;
char *arg[4];
va_start(args, code);
for (i = 0; i < 4; i++)
arg[i] = va_arg(args, char *);
ERROR_define((char *)code, arg);
}
*/
/*
static void throw(long code, va_list args)
{
int i;
char *arg[4];
for (i = 0; i < 4; i++)
arg[i] = va_arg(args, char *);
ERROR_define((char *)code, arg);
PROPAGATE();
}
*/
PUBLIC void THROW(long code, ...)
{
va_list args;
int i;
char *arg[4];
va_start(args, code);
for (i = 0; i < 4; i++)
arg[i] = va_arg(args, char *);
ERROR_define((char *)code, arg);
PROPAGATE();
}
PUBLIC void THROW_SYSTEM(int err, const char *path)
{
switch(err)
{
case ENOENT:
THROW(E_NEXIST, path);
case EISDIR:
THROW(E_DIR, path);
case ENOTDIR:
THROW(E_NDIR, path);
case ENOMEM:
THROW(E_MEMORY);
case EACCES:
THROW(E_ACCESS);
case ENAMETOOLONG:
THROW(E_TOOLONG);
case ENOSPC:
THROW(E_FULL);
case EEXIST:
THROW(E_EXIST, path);
default:
THROW(E_SYSTEM, strerror(err));
}
}
/*
PUBLIC void THROW_LIBRARY()
{
int n;
char buf[512];
char *msg = GAMBAS_Error;
if (FP != NULL)
{
sprintf(buf, "[%s] ", TRACE_get_current_position());
add_error_message(buf, FALSE);
}
sprintf(buf, "#%d: ", E_FROMLIB);
add_error_message(buf, FALSE);
if ((long)msg > 0 && (long)msg < 255)
n = snprintf(buf, sizeof(buf), ERROR_Message[(long)msg]);
else
n = snprintf(buf, sizeof(buf), msg);
ERROR_code = E_FROMLIB;
throw_error(msg);
}
*/
PUBLIC void ERROR_panic(const char *error, ...)
{
va_list args;
va_start(args, error);
fflush(NULL);
fprintf(stderr, "\n"
"** INTERNAL ERROR **\n"
);
vfprintf(stderr, error, args);
fprintf(stderr, "\n");
if (ERROR_info.code)
{
fprintf(stderr, "\n");
ERROR_print();
fprintf(stderr, "\n");
}
fprintf(stderr, "** Program aborting... Sorry... :-(\n\n");
/*abort();*/
_exit(1);
}
PUBLIC void ERROR_print_at(FILE *where, bool msgonly, bool newline)
{
if (!ERROR_info.code)
return;
if (!msgonly)
{
if (ERROR_info.cp && ERROR_info.fp && ERROR_info.pc)
fprintf(where, "%s: ", DEBUG_get_position(ERROR_info.cp, ERROR_info.fp, ERROR_info.pc));
else
fprintf(where, "ERROR: ");
/*if (ERROR_info.code > 0 && ERROR_info.code < 256)
fprintf(where, "%ld:", ERROR_info.code);*/
if (ERROR_info.code > 0)
fprintf(where, "#%ld: ", ERROR_info.code);
}
fprintf(where, "%s", ERROR_info.msg);
if (newline)
fputc('\n', where);
}
PUBLIC void ERROR_print(void)
{
static bool lock = FALSE;
DEBUG_BACKTRACE *bt = ERROR_info.backtrace;
ERROR_print_at(stderr, FALSE, TRUE);
if (bt)
{
int i;
for(i = 0; i < ARRAY_count(bt); i++)
fprintf(stderr, "%d: %s\n", i, DEBUG_get_position(bt[i].cp, bt[i].fp, bt[i].pc));
}
if (EXEC_main_hook_done && !EXEC_debug && EXEC_Hook.error && !lock)
{
lock = TRUE;
GAMBAS_DoNotRaiseEvent = TRUE;
HOOK(error)(ERROR_info.code, ERROR_info.msg, DEBUG_get_position(ERROR_info.cp, ERROR_info.fp, ERROR_info.pc));
lock = FALSE;
}
}
PUBLIC void ERROR_save(ERROR_INFO *save)
{
save->code = ERROR_info.code;
save->cp = ERROR_info.cp;
save->fp = ERROR_info.fp;
save->pc = ERROR_info.pc;
save->backtrace = ERROR_info.backtrace;
ERROR_info.backtrace = NULL;
#ifdef OS_OPENBSD
strlcpy(save->msg, ERROR_info.msg, MAX_ERROR_MSG+1);
#else
strcpy(save->msg, ERROR_info.msg);
#endif
}
PUBLIC void ERROR_restore(ERROR_INFO *save)
{
ERROR_reset();
ERROR_info.code = save->code;
ERROR_info.cp = save->cp;
ERROR_info.cp = save->fp;
ERROR_info.pc = save->pc;
ERROR_info.backtrace = save->backtrace;
save->backtrace = NULL;
#ifdef OS_OPENBSD
strlcpy(ERROR_info.msg, save->msg, MAX_ERROR_MSG+1);
#else
strcpy(ERROR_info.msg, save->msg);
#endif
}