Source/VariableNode.m

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 2010, 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 "VariableNode.h"
  18
  19 #import "AppDelegate.h"
  20 #include "base64.h"
  21
  22 // Private Properties //////////////////////////////////////////////////////////
  23
  24 @interface VariableNode ()
  25
  26 @property (copy) NSString* name;
  27 @property (copy) NSString* fullName;
  28 @property (copy) NSString* className;
  29 @property (copy) NSString* type;
  30 @property (copy) NSString* value;
  31 @property (retain) NSMutableArray* children;
  32
  33 // Takes an XML node and computes the value.
  34 - (NSString*)decodeValueForNode:(NSXMLElement*)node;
  35
  36 @end
  37
  38 ////////////////////////////////////////////////////////////////////////////////
  39
  40 @implementation VariableNode
  41
  42 @synthesize name = name_;
  43 @synthesize fullName = fullName_;
  44 @synthesize className = className_;
  45 @synthesize type = type_;
  46 @synthesize value = value_;
  47 @synthesize children = children_;
  48 @synthesize childCount = childCount_;
  49
  50 - (id)initWithXMLNode:(NSXMLElement*)node
  51 {
  52   if (self = [super init]) {
  53     self.name       = [[node attributeForName:@"name"] stringValue];
  54     self.fullName   = [[node attributeForName:@"fullName"] stringValue];
  55     self.className  = [[node attributeForName:@"className"] stringValue];
  56     self.type       = [[node attributeForName:@"type"] stringValue];
  57     self.value      = [self decodeValueForNode:node];
  58     self.children   = [NSMutableArray array];
  59     if ([node children]) {
  60       [self setChildrenFromXMLChildren:[node children]];
  61     }
  62     childCount_     = [[[node attributeForName:@"numchildren"] stringValue] integerValue];
  63   }
  64   return self;
  65 }
  66
  67 - (void)dealloc
  68 {
  69   self.name = nil;
  70   self.fullName = nil;
  71   self.className = nil;
  72   self.type = nil;
  73   self.value = nil;
  74   self.children = nil;
  75   [super dealloc];
  76 }
  77
  78 - (void)setChildrenFromXMLChildren:(NSArray*)children
  79 {
  80   for (NSXMLElement* child in children) {
  81     VariableNode* node = [[VariableNode alloc] initWithXMLNode:child];
  82     [children_ addObject:[node autorelease]];
  83   }
  84 }
  85
  86 - (NSArray*)dynamicChildren
  87 {
  88   NSArray* children = self.children;
  89   if (![self isLeaf] && [children count] < 1) {
  90     // If this node has children but they haven't been loaded from the backend,
  91     // request them asynchronously.
  92     [[AppDelegate instance].debugger fetchProperty:self.fullName forNode:self];
  93   }
  94   return children;
  95 }
  96
  97 - (BOOL)isLeaf
  98 {
  99   return (self.childCount == 0);
 100 }
 101
 102 - (NSString*)displayType
 103 {
 104   if (self.className != nil) {
 105     return [NSString stringWithFormat:@"%@ (%@)", self.className, self.type];
 106   }
 107   return self.type;
 108 }
 109
 110 // Private /////////////////////////////////////////////////////////////////////
 111
 112 - (NSString*)decodeValueForNode:(NSXMLElement*)node
 113 {
 114   // Non-leaf nodes do not have a value:
 115   //   https://www.bluestatic.org/bugs/showreport.php?bugid=168
 116   if (![self isLeaf]) {
 117     return @"...";
 118   }
 119
 120   // The value of the node is base64 encoded.
 121   if ([[[node attributeForName:@"encoding"] stringValue] isEqualToString:@"base64"]) {
 122     const char* str = [[node stringValue] UTF8String];
 123     int strlen = [[node stringValue] length];
 124
 125     char* data;
 126     size_t datalen;
 127
 128     if (!base64_decode_alloc(str, strlen, &data, &datalen))
 129       NSLog(@"error in converting %@ from base64", self);
 130
 131     NSString* ret = nil;
 132     if (data) {
 133       ret = [NSString stringWithUTF8String:data];
 134       free(data);
 135     }
 136
 137     return ret;
 138   }
 139
 140   // The value is just a normal string.
 141   return [node stringValue];
 142 }
 143
 144 @end