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Get root index from the binary property list data and use this to return the root object.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@29449 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Fred Kiefer 2010-01-30 12:47:50 +00:00
parent e06564cf1b
commit 3f8bdadc33
2 changed files with 31 additions and 12 deletions
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37
Source/NSPropertyList.m
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@ -418,8 +418,9 @@ extern BOOL GSScanDouble(unichar*, unsigned, double*);
NSData *data;
unsigned offset_size; // Number of bytes per table entry
unsigned index_size; // Number of bytes per table entry
unsigned object_count; // Number of objects
unsigned root_index; // Index of root object
unsigned table_start; // Start address of object table
unsigned table_len; // Length of object table
}
- (id) initWithData: (NSData*)plData
@ -2676,9 +2677,9 @@ GSPropertyListMake(id obj, NSDictionary *loc, BOOL xml,
}
- (id) initWithData: (NSData*)plData
mutability: (NSPropertyListMutabilityOptions)m;
mutability: (NSPropertyListMutabilityOptions)m
{
unsigned length;
unsigned length;
length = [plData length];
if (length < 32)
@ -2687,35 +2688,46 @@ GSPropertyListMake(id obj, NSDictionary *loc, BOOL xml,
}
else
{
unsigned char postfix[32];
unsigned char postfix[32];
// FIXME: Get more of the details
[plData getBytes: postfix range: NSMakeRange(length-32, 32)];
[plData getBytes: postfix range: NSMakeRange(length - 32, 32)];
offset_size = postfix[6];
index_size = postfix[7];
// FIXME: Looks like the following are actually 8 byte values.
// But taking the lower 4 bytes is currently sufficient.
object_count = (postfix[12] << 24) + (postfix[13] << 16)
+ (postfix[14] << 8) + postfix[15];
root_index = (postfix[20] << 24) + (postfix[21] << 16)
+ (postfix[22] << 8) + postfix[23];
table_start = (postfix[28] << 24) + (postfix[29] << 16)
+ (postfix[30] << 8) + postfix[31];
if (offset_size < 1 || offset_size > 4)
{
[NSException raise: NSGenericException
format: @"Unknown table size %d", offset_size];
unsigned saved = offset_size;
DESTROY(self); // Bad format
[NSException raise: NSGenericException
format: @"Unknown offset size %d", saved];
}
else if (index_size < 1 || index_size > 4)
{
unsigned saved = offset_size;
unsigned saved = index_size;
DESTROY(self); // Bad format
[NSException raise: NSGenericException
format: @"Unknown table size %d", saved];
}
else if (root_index >= object_count)
{
DESTROY(self); // Bad format
}
else if (table_start > length - 32)
{
DESTROY(self); // Bad format
}
else
{
table_len = length - table_start - 32;
ASSIGN(data, plData);
_bytes = (const unsigned char*)[data bytes];
mutability = m;
@ -2727,7 +2739,7 @@ GSPropertyListMake(id obj, NSDictionary *loc, BOOL xml,
- (unsigned long) offsetForIndex: (unsigned)index
{
if (index > table_len)
if (index >= object_count)
{
[NSException raise: NSRangeException
format: @"Object table index out of bounds %d.", index];
@ -2853,7 +2865,7 @@ GSPropertyListMake(id obj, NSDictionary *loc, BOOL xml,
- (id) rootObject
{
return [self objectAtIndex: 0];
return [self objectAtIndex: root_index];
}
- (id) objectAtIndex: (NSUInteger)index
@ -3430,6 +3442,7 @@ GSPropertyListMake(id obj, NSDictionary *loc, BOOL xml,
meta[13] = (len >> 16) % 256;
meta[14] = (len >> 8) % 256;
meta[15] = len % 256;
// root index is always 0, no need to write it
meta[28] = (table_start >> 24);
meta[29] = (table_start >> 16) % 256;
meta[30] = (table_start >> 8) % 256;