Source/NSXMLElementAdditions.m

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 2007 - 2011, Blue Static <http://www.bluestatic.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
   6  * General Public License as published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
  10  * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with this program; if not,
  14  * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  15  */
  16
  17 #import <Cocoa/Cocoa.h>
  18
  19 #import "AppDelegate.h"
  20 #include "modp_b64.h"
  21
  22 @interface NSXMLElement (GDBpAdditions_Private)
  23 - (NSString*)internalName;
  24 - (NSString*)internalBase64DecodedValue;
  25 - (void)recursiveBase64DecodedValue:(NSMutableString*)stringBuilder
  26                               depth:(NSUInteger)depth;
  27 @end
  28
  29 @implementation NSXMLElement (GDBpAdditions)
  30
  31 /**
  32  * Returns whether or not this node has any children
  33  */
  34 - (BOOL)isLeaf
  35 {
  36   return ([[[self attributeForName:@"children"] stringValue] intValue] == 0);
  37 }
  38
  39 /**
  40  * Returns the "name" attribute.
  41  */
  42 - (NSString*)internalName
  43 {
  44   return [[self attributeForName:@"name"] stringValue];
  45 }
  46
  47 /**
  48  * Does the actual work of decoding base64.
  49  */
  50 - (NSString*)internalBase64DecodedValue
  51 {
  52   // The value of the node is base64 encoded.
  53   if ([[[self attributeForName:@"encoding"] stringValue] isEqualToString:@"base64"]) {
  54     const char* src = [[self stringValue] UTF8String];
  55     NSUInteger srclen = [[self stringValue] length];
  56
  57     int destlen = modp_b64_decode_len(srclen);
  58     char* dest = malloc(destlen);
  59     memset(dest, 0, destlen);
  60
  61     modp_b64_decode(dest, src, srclen);
  62
  63     NSString* ret = nil;
  64     if (dest) {
  65       ret = [NSString stringWithUTF8String:dest];
  66       free(dest);
  67     }
  68     return ret;
  69   }
  70
  71   // The value is just a normal string.
  72   return [self stringValue];
  73 }
  74
  75 /**
  76  * Returns the value of the property
  77  */
  78 - (NSString*)base64DecodedValue
  79 {
  80   if (![self isLeaf]) {
  81     // For non-leaf nodes, display the object structure by recursively printing
  82     // the base64-decoded values.
  83     NSMutableString* mutableString = [[NSMutableString alloc] initWithString:@"(\n"];
  84     [self recursiveBase64DecodedValue:mutableString depth:1];
  85     [mutableString appendString:@")"];
  86     return [mutableString autorelease];
  87   }
  88
  89   return [self internalBase64DecodedValue];
  90 }
  91
  92 /**
  93  * Recursively builds a print_r()-style output by attaching the data to
  94  * |stringBuilder| with indent level specified by |depth|.
  95  */
  96 - (void)recursiveBase64DecodedValue:(NSMutableString*)stringBuilder
  97                               depth:(NSUInteger)depth
  98 {
  99   // Create the indention string for this level.
 100   NSString* indent = [@"" stringByPaddingToLength:depth withString:@"\t" startingAtIndex:0];
 101
 102   if ([self isLeaf]) {
 103     // If this is a leaf node, simply append the key=>value pair.
 104     [stringBuilder appendFormat:@"%@%@\t=>\t%@\n", indent, [self internalName], [self internalBase64DecodedValue]];
 105   } else {
 106     // If this node has children, increase the depth and recurse.
 107     [stringBuilder appendFormat:@"%@%@\t=>\t(\n", indent, [self internalName]];
 108     for (NSXMLElement* elm in [self children]) {
 109       [elm recursiveBase64DecodedValue:stringBuilder depth:depth + 1];
 110     }
 111     [stringBuilder appendFormat:@"%@)\n", indent];
 112   }
 113 }
 114
 115 @end