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/*
 *  R.app : a Cocoa front end to: "R A Computer Language for Statistical Data Analysis"
 *  
 *  R.app Copyright notes:
 *                     Copyright (C) 2004-5  The R Foundation
 *                     written by Stefano M. Iacus and Simon Urbanek
 *
 *                  
 *  R Copyright notes:
 *                     Copyright (C) 1995-1996   Robert Gentleman and Ross Ihaka
 *                     Copyright (C) 1998-2001   The R Development Core Team
 *                     Copyright (C) 2002-2004   The R Foundation
 *
 *  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 2 of the License, 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.
 *
 *  A copy of the GNU General Public License is available via WWW at
 *  http://www.gnu.org/copyleft/gpl.html.  You can also obtain it by
 *  writing to the Free Software Foundation, Inc., 59 Temple Place,
 *  Suite 330, Boston, MA  02111-1307  USA.
 *
 *  Created by Simon Urbanek on 4/14/05.
 *  $Id: GlobalExHandler.m 4647 2007-07-19 21:30:22Z urbaneks $
 */

#import "GlobalExHandler.h"
#include <unistd.h>
#import "RGUI.h"

@implementation GlobalExHandler

- (id) init
{
    self = [super init];
    if (self) {
        [[NSExceptionHandler defaultExceptionHandler] setDelegate:self];
        SLog(@"[GlobalExHandler.init - ready to track exceptions]");
    }
    return self;
}

- (void) dealloc {
    [[NSExceptionHandler defaultExceptionHandler] setDelegate:nil];
    [super dealloc];
}

- (BOOL)exceptionHandler:(NSExceptionHandler *)sender shouldLogException:(NSException *)exception mask:(unsigned int)aMask  // mask is NSLog<exception type>Mask, exception's userInfo has stack trace for key NSStackTraceKey
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSString *stack = [[exception userInfo] objectForKey:NSStackTraceKey];
    NSTask *ls=[[NSTask alloc] init];
    NSString *pid = [[NSNumber numberWithInt:getpid()] stringValue];
    NSMutableArray *args = [NSMutableArray arrayWithCapacity:20];
    
    NSLog(@"Logged exception %@ with trace %@", exception, stack);
    if ([[NSFileManager defaultManager] fileExistsAtPath:@"/usr/bin/atos"]) {
        BOOL lastWasNewline = NO;
        NSPipe *sop = [[NSPipe alloc] init];
        NSFileHandle *soh = [sop fileHandleForReading];
        NSLog(@"Calling atos to retrieve symbols, please wait!");
        [args addObject:@"-p"];
        [args addObject:pid];
        [args addObjectsFromArray:[stack componentsSeparatedByString:@" "]];
        
        [ls setLaunchPath:@"/usr/bin/atos"];
        [ls setArguments:args];
        [ls setStandardOutput:sop];
        [ls launch];
        while ([ls isRunning]) {
            NSData *data = [soh availableData];
            if (data && [data length]>0) { /* remove empty lines in the trace */
                const char *c = [data bytes], *d = c, *cs = [data bytes] + [data length];
                if (*c == '\n' && lastWasNewline) d=++c;
                while (*d && d < cs) {
                    if (*d=='\n' && d + 1 < cs && d[1]=='\n') {
                        int l = d - c;
                        while (d < cs && *d=='\n') d++;
                        fwrite(c, 1, l+1, stderr);
                        c=d;
                    } else d++;
                }
                if (c < cs && *c && d-c)
                    fwrite(c, 1, d-c, stderr);
                lastWasNewline = (*(cs-1) == '\n') ? YES : NO;
            }
        }
        [ls release];
        [sop release];
    } else
    NSLog(@"Unable to find atos - symbols can't be dumped!");
    [pool release];

    return NO;
}

- (BOOL)exceptionHandler:(NSExceptionHandler *)sender shouldHandleException:(NSException *)exception mask:(unsigned int)aMask   // mask is NSHandle<exception type>Mask, exception's userInfo has stack trace for key
{
    return NO;
}

@end