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/* err.c - Runtime error reporting functions
* Written by Jim Dunleavy <jim.dunleavy@erha.ie>
*
* This file is part of Frotz.
*
* Frotz 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 2 of the License, or
* (at your option) any later version.
*
* Frotz 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "frotz.h"
/* Define stuff for stricter Z-code error checking, for the generic
Unix/DOS/etc terminal-window interface. Feel free to change the way
player prefs are specified, or replace report_zstrict_error()
completely if you want to change the way errors are reported. */
/* int err_report_mode = ERR_DEFAULT_REPORT_MODE; */
static int error_count[ERR_NUM_ERRORS];
static char *err_messages[] = {
"Text buffer overflow",
"Store out of dynamic memory",
"Division by zero",
"Illegal object",
"Illegal attribute",
"No such property",
"Stack overflow",
"Call to illegal address",
"Call to non-routine",
"Stack underflow",
"Illegal opcode",
"Bad stack frame",
"Jump to illegal address",
"Can't save while in interrupt",
"Nesting stream #3 too deep",
"Illegal window",
"Illegal window property",
"Print at illegal address",
"@jin called with object 0",
"@get_child called with object 0",
"@get_parent called with object 0",
"@get_sibling called with object 0",
"@get_prop_addr called with object 0",
"@get_prop called with object 0",
"@put_prop called with object 0",
"@clear_attr called with object 0",
"@set_attr called with object 0",
"@test_attr called with object 0",
"@move_object called moving object 0",
"@move_object called moving into object 0",
"@remove_object called with object 0",
"@get_next_prop called with object 0"
};
static void print_long (unsigned long value, int base);
/*
* init_err
*
* Initialise error reporting.
*
*/
void init_err (void)
{
int i;
/* Initialize the counters. */
for (i = 0; i < ERR_NUM_ERRORS; i++)
error_count[i] = 0;
}
/*
* runtime_error
*
* An error has occurred. Ignore it, pass it to os_fatal or report
* it according to err_report_mode.
*
* errnum : Numeric code for error (1 to ERR_NUM_ERRORS)
*
*/
void runtime_error (int errnum)
{
int wasfirst;
if (errnum <= 0 || errnum > ERR_NUM_ERRORS)
return;
if (f_setup.err_report_mode == ERR_REPORT_FATAL
|| (!f_setup.ignore_errors && errnum <= ERR_MAX_FATAL)) {
flush_buffer ();
os_fatal (err_messages[errnum - 1]);
return;
}
wasfirst = (error_count[errnum - 1] == 0);
error_count[errnum - 1]++;
if ((f_setup.err_report_mode == ERR_REPORT_ALWAYS)
|| (f_setup.err_report_mode == ERR_REPORT_ONCE && wasfirst)) {
long pc;
GET_PC (pc);
print_string ("Warning: ");
print_string (err_messages[errnum - 1]);
print_string (" (PC = ");
print_long (pc, 16);
print_char (')');
if (f_setup.err_report_mode == ERR_REPORT_ONCE) {
print_string (" (will ignore further occurrences)");
} else {
print_string (" (occurence ");
print_long (error_count[errnum - 1], 10);
print_char (')');
}
new_line ();
}
} /* report_error */
/*
* print_long
*
* Print an unsigned 32bit number in decimal or hex.
*
*/
static void print_long (unsigned long value, int base)
{
unsigned long i;
char c;
for (i = (base == 10 ? 1000000000 : 0x10000000); i != 0; i /= base)
if (value >= i || i == 1) {
c = (value / i) % base;
print_char (c + (c <= 9 ? '0' : 'a' - 10));
}
}/* print_long */
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