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BC Soft Errors

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Reviewed By: javache

Differential Revision: D4131340

fbshipit-source-id: b0827fc99d94985fbbb2a1b03ddc4d6feab10bff
This commit is contained in:
Ashok Menon
2016-11-11 05:21:37 -08:00
committed by Facebook Github Bot
parent 7a073d3b13
commit 8288bc2006
5 changed files with 63 additions and 21 deletions
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28
React/Base/RCTJavaScriptLoader.h
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@@ -24,25 +24,33 @@ typedef NS_ENUM(NSInteger) {
} RCTScriptTag;
/**
* RCTMagicNumber
* RCTBundleHeader
*
* RAM bundles and BC bundles begin with magic numbers. For RAM bundles this is
* 4 bytes, for BC bundles this is 8 bytes. This structure holds the first 8
* RAM bundles and BC bundles begin with headers. For RAM bundles this is
* 4 bytes, for BC bundles this is 12 bytes. This structure holds the first 12
* bytes from a bundle in a way that gives access to that information.
*/
typedef union {
uint64_t allBytes;
uint32_t first4;
uint64_t first8;
} RCTMagicNumber;
// `allBytes` is the first field so that zero-initializing the union fills
// it completely with zeroes. Without it, only the first field of the union
// gets zero-initialized.
uint32_t allBytes[3];
uint32_t RAMMagic;
struct {
uint64_t BCMagic;
uint32_t BCVersion;
};
} RCTBundleHeader;
/**
* RCTParseMagicNumber
* RCTParseTypeFromHeader
*
* Takes the first 8 bytes of a bundle, and returns a tag describing the
* bundle's format.
*/
RCT_EXTERN RCTScriptTag RCTParseMagicNumber(RCTMagicNumber magic);
RCT_EXTERN RCTScriptTag RCTParseTypeFromHeader(RCTBundleHeader header);
extern NSString *const RCTJavaScriptLoaderErrorDomain;
@@ -52,6 +60,7 @@ NS_ENUM(NSInteger) {
RCTJavaScriptLoaderErrorFailedReadingFile = 3,
RCTJavaScriptLoaderErrorFailedStatingFile = 3,
RCTJavaScriptLoaderErrorURLLoadFailed = 3,
RCTJavaScriptLoaderErrorBCVersion = 4,
RCTJavaScriptLoaderErrorCannotBeLoadedSynchronously = 1000,
};
@@ -80,6 +89,7 @@ typedef void (^RCTSourceLoadBlock)(NSError *error, NSData *source, int64_t sourc
* RCTJavaScriptLoaderErrorDomain and the code RCTJavaScriptLoaderErrorCannotBeLoadedSynchronously.
*/
+ (NSData *)attemptSynchronousLoadOfBundleAtURL:(NSURL *)scriptURL
runtimeBCVersion:(int32_t)runtimeBCVersion
sourceLength:(int64_t *)sourceLength
error:(NSError **)error;