react-native/React/CxxBridge/NSDataBigString.mm

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/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "NSDataBigString.h"
namespace facebook {
namespace react {
static NSData *ensureNullTerminated(NSData *source)
{
if (!source || source.length == 0) {
return nil;
}
NSUInteger sourceLength = source.length;
unsigned char lastByte;
[source getBytes:&lastByte range:NSMakeRange(sourceLength - 1, 1)];
// TODO: bundles from the packager should always include a NULL byte
// or we should we relax this requirement and only read as much from the
// buffer as length indicates
if (lastByte == '\0') {
return source;
} else {
NSMutableData *data = [source mutableCopy];
unsigned char nullByte = '\0';
[data appendBytes:&nullByte length:1];
return data;
}
}
NSDataBigString::NSDataBigString(NSData *data)
{
m_length = [data length];
m_data = ensureNullTerminated(data);
}
} }