Hex-View/HexViewModel.m at master · azzmosphere/Hex-View · GitHub

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/*
 *========================================================
 *  HexViewModel.m
 *  Hex View
 *
 *  Created by Aaron Spiteri on 7/03/11.
 *  Copyright 2011 __MyCompanyName__. All rights reserved.
 *========================================================
 */

#import "HexViewModel.h"

@implementation HexViewModel
@synthesize  fileError, filePath, fbuffer;

/*
 *========================================================
 *
 * Class constructor.
 *========================================================
 */
-(HexViewModel *) initWithFilePath: (NSString *) filePathIn {
    self = [super init];
    if( self ){
        self.filePath = filePathIn;
    }
    return self;
}

/*
 *========================================================
 *
 * checkFile
 *
 * Check the file for any potential problems using the
 * file manager,  also prime the file for opening by
 * setting encoding type and other attributes required.
 *========================================================
 */
-(BOOL) checkFile {
    NSFileManager *filemgr = [NSFileManager defaultManager];
    if ([filemgr fileExistsAtPath: self.filePath ] == NO){
        self.fileError = [self.filePath stringByAppendingString:@": file does not exist"];
        return NO;
    }
    else if([filemgr isReadableFileAtPath: self.filePath ] == NO){
        self.fileError = [self.filePath stringByAppendingString:@": can not be read"];
        return NO;
    }
    return YES;
}

/*
 *========================================================
 * getFileError
 *========================================================
 */
-(NSString *) getFileError {
    return self.fileError;
}

/*
 *========================================================
 * getBuffer
 *
 * Return the contents of the read file as ASCII text
 *========================================================
 */
-(NSString *)getBufferAsHex: (id)prog {
    NSString  *sout = nil;
    int i =0, *lary = calloc(1,sizeof(int)), byteCount = 0, pOffset = BYTE_SIZE;
    char *cFileName = calloc(PATH_MAX,BYTESZ);

    [filePath getCString: cFileName maxLength: PATH_MAX encoding: NSNonLossyASCIIStringEncoding];

    if((i = getFileAsInt(cFileName, &lary,&byteCount)) != 0){
        fileError = [NSString stringWithCString: strerror(i)];
        return nil;
    }

    for(;i < byteCount;i ++){
        if(sout == nil){
            sout = [NSString stringWithFormat:@HEXFORMAT, lary[i]];
        }
        else {
            sout = [sout stringByAppendingFormat:@HEXFORMAT, lary[i]];
        }
        if(i >= pOffset){
            @try{
                [prog setDoubleValue:100*i/(double)byteCount];
                [prog displayIfNeeded];
            }@finally {
                // do nothing
            }
            pOffset += POFFSET;
        }
    }
    return sout;
}

/*
 *========================================================
 * setProgressMeter
 *
 * Set the progress meter, or try too.
 *========================================================
 */


@end