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ComposedImageReader.class.st
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ComposedImageReader.class.st
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Class {
#name : #ComposedImageReader,
#superclass : #AbstractComposedImageAccess,
#category : #'VMMaker-ImageFormat'
}
{ #category : #reading }
ComposedImageReader >> endOfSTON: file [
"This method consume 2 chars from file and return they are equivalent to '\n}'"
| charLeft charRight |
charLeft := self fgetc: file.
charRight := self fgetc: file.
^ (self isEndOfLine: charLeft) and: [ charRight = $} ]
]
{ #category : #reading }
ComposedImageReader >> readDataFromFileName: fullFileName startingAt: startingAddress bytes: bytesToRead [
<inline: true>
<var: #file type: #sqImageFile>
| file bytes |
file := self
sqImageFile: fullFileName
Open: 'rb'.
bytesToRead > 0 ifTrue:[
bytes := self
sq: startingAddress
Image: (self sizeof: #char)
File: bytesToRead
Read: file]
ifFalse: [ bytes := 0 ].
self sqImageFileClose: file.
^ bytes
]
{ #category : #reading }
ComposedImageReader >> readFieldsSTONFrom: file into: aStruct [
<inline: true>
<var: #fieldName declareC: 'char fieldName[255]'>
<var: #fieldValue type: #'long long'>
| fieldName fieldValue |
self simulationOnly: [
fieldName := ValueHolder new.
fieldValue := ValueHolder new ].
"Initialize the Struct with zeros"
aStruct
withFieldsDo: [ :fn :fv | aStruct setField: fn to: 0 ]
separatedBy: [ ].
"This solution does NOT WORK with STON file without fields (empty STON)"
[
self
fscanf: file
_: self fieldFormat
_: fieldName
_: (self cCoerce: (self addressOf: fieldValue) to: #'sqInt*').
aStruct setField: (self contentsOf: fieldName) to: (self contentsOf: fieldValue).
self endOfSTON: file
] whileFalse
]
{ #category : #reading }
ComposedImageReader >> readHeadSTONFrom: file into: aStruct [
<inline: true>
<var: #structName declareC: 'char structName[255]'>
| structName |
self simulationOnly: [ structName := ValueHolder new ].
self fscanf: file _: self headFormat _: structName.
self simulationOnly: [
aStruct withStructNameDo: [ :name |
self assert: name = (self contentsOf: structName) ] ]
]
{ #category : #api }
ComposedImageReader >> readHeaderFromImage: imageFileName [
<inline: true>
<var: #imageFileName type: 'char *'>
<var: #file type: #sqImageFile>
<var: #buffer declareC: 'char buffer[255]'>
<var: #header type: #SpurImageHeaderStruct>
<var: #headerPtr type: #'SpurImageHeaderStruct *'>
| header buffer file headerPtr |
self simulationOnly: [
buffer := nil.
header:= SpurImageHeaderStruct new
].
file := self sqImageFile: (self headerFileNameinImage: imageFileName into: buffer bufferSize: 255) Open: 'r'.
file
ifNil: [
self logError: 'Could not open header file: %s'
_: buffer.
interpreter ioExitWithErrorCode: 1 ].
headerPtr := self addressOf: header.
self readSTONFrom: file into: headerPtr.
self extractImageVersionFrom: (header imageFormat) into: headerPtr.
self sqImageFileClose: file.
^ header
]
{ #category : #api }
ComposedImageReader >> readImageNamed: imageName [
<var: #imageName declareC: 'char *imageName'>
<var: #aHeader type: #'SpurImageHeaderStruct'>
<api>
| aHeader |
objectMemory ensureAuxiliarStructures.
aHeader := self readHeaderFromImage: imageName.
self loadHeaderToMemory: aHeader.
interpreter allocateMemoryForImage: imageName withHeader: aHeader.
^ 0 "Must return sqInt"
]
{ #category : #reading }
ComposedImageReader >> readMetadataFromFileName: fullFileName [
<inline: true>
<var: #file type: #sqImageFile>
<var: #metadata type: #ComposedMetadataStruct>
<var: #metadataPointer type: #'ComposedMetadataStruct *'>
| metadata file metadataPointer |
self simulationOnly: [ metadata := ComposedMetadataStruct new ].
file := self
sqImageFile: fullFileName
Open: 'r'.
"Needed because addressOf: miss the parameter type"
metadataPointer := self addressOf: metadata.
self readSTONFrom: file into: metadataPointer.
self sqImageFileClose: file.
^ metadata
]
{ #category : #'perm - space' }
ComposedImageReader >> readPermanentSpaceDataFromImage: imageFileName startingAt: startingAddress bytes: bytesToRead [
^ self
readDataFromFileName: (self permSpaceDataFileInImage: imageFileName)
startingAt: startingAddress
bytes: bytesToRead
]
{ #category : #'perm - space' }
ComposedImageReader >> readPermanentSpaceFromImageFile: imageFileName header: aHeader [
<inline: false>
<var: #aHeader type: #SpurImageHeaderStruct>
<var: #permSpaceMetadata type: #ComposedMetadataStruct>
<var: #bytesRead type: #'size_t'>
<var: #dataSize type: #'size_t'>
<var: #oldBase type: #'void*'>
<var: #newBase type: #'void*'>
| newBase permSpaceMetadata oldBase dataSize bytesRead |
(self fileExists: (self permSpaceMetadataFileNameInImage: imageFileName))
ifFalse: [ ^ 0 ].
permSpaceMetadata := self readPermanentSpaceMetadataFromImage: imageFileName.
oldBase := permSpaceMetadata startAddress.
dataSize := permSpaceMetadata dataSize.
(objectMemory getMemoryMap ensureAtLeastPermSpaceOf: dataSize)
ifFalse: [ interpreter error: 'Could not allocate PermSpace' ].
newBase := objectMemory getMemoryMap permSpaceStart.
newBase ~= oldBase ifTrue: [
self logError: 'Expecting Base %p Got %p' _: oldBase _: newBase.
interpreter unableToReadImageError ].
bytesRead := self
readPermanentSpaceDataFromImage: imageFileName
startingAt: (self pointerForOop: newBase)
bytes: dataSize.
objectMemory setPermSpaceFreeStart: (objectMemory getMemoryMap permSpaceStart + dataSize).
"Check bytes read"
bytesRead ~= dataSize ifTrue: [
self logError: 'Expecting %lld Got %lld' _: dataSize _: bytesRead.
interpreter unableToReadImageError ].
^ bytesRead
]
{ #category : #'perm - space' }
ComposedImageReader >> readPermanentSpaceMetadataFromImage: imageFileName [
^ self readMetadataFromFileName: (self permSpaceMetadataFileNameInImage: imageFileName)
]
{ #category : #reading }
ComposedImageReader >> readSTONFrom: file into: aStruct [
<inline: true>
self readHeadSTONFrom: file into: aStruct.
self readFieldsSTONFrom: file into: aStruct
]
{ #category : #segments }
ComposedImageReader >> readSegmentData: segmentIndex fromImage: imageFileName startingAt: startingAddress bytes: bytesToRead [
^ self
readDataFromFileName: (self segmentDataFile: segmentIndex inImage: imageFileName)
startingAt: startingAddress
bytes: bytesToRead
]
{ #category : #segments }
ComposedImageReader >> readSegmentMetadata: segmentIndex fromImage: imageFileName [
^ self readMetadataFromFileName: (self segmentMetadataFile: segmentIndex inImage: imageFileName)
]
{ #category : #segments }
ComposedImageReader >> readSegmentsFromImageFile: imageFileName header: aHeader [
<inline: false>
<var: 'segInfo' type: #'SpurSegmentInfo *'>
<var: 'aHeader' type: #SpurImageHeaderStruct>
<var: #segmentMetadata type: #ComposedMetadataStruct>
<var: #bytesRead type: #'size_t'>
<var: #totalBytesRead type: #'size_t'>
<var: #segmentSize type: #'size_t'>
| bytesRead totalBytesRead segmentSize oldBase newBase segmentIndex segmentMetadata |
self prepareSegmentsToRead.
"segment sizes include the two-header-word bridge at the end of each segment."
segmentIndex := 0.
totalBytesRead := 0.
newBase := objectMemory getMemoryMap oldSpaceStart.
[
segmentMetadata := self readSegmentMetadata: segmentIndex fromImage: imageFileName.
oldBase := segmentMetadata startAddress.
segmentSize := segmentMetadata dataSize.
segmentManager withNewSegmentDo: [ :segInfo |
segInfo
segStart: oldBase;
segSize: segmentSize;
swizzle: newBase - oldBase ].
bytesRead := self
readSegmentData: segmentIndex
fromImage: imageFileName
startingAt: (self pointerForOop: newBase)
bytes: segmentSize.
bytesRead > 0 ifTrue: [ totalBytesRead := totalBytesRead + bytesRead ].
"Check segment bytes read"
bytesRead ~= segmentSize ifTrue: [
self logError: 'Expecting %lld Got %lld' _: segmentSize _: bytesRead.
interpreter unableToReadImageError ].
"The next segment will override the bridge of this segment"
newBase := newBase + segmentSize - objectMemory bridgeSize.
"Move to (maybe) next segment"
segmentIndex := segmentIndex + 1.
self existSegment: segmentIndex inImage: imageFileName.
] whileTrue.
self finalizeSegmentsRead: totalBytesRead newBase: newBase.
^ totalBytesRead
]
{ #category : #testing }
ComposedImageReader >> validateContent: imageFile [
"Contains header metadata and AT LEAST one segment (data & metadata)"
<doNotGenerate>
{ 'header.ston'. 'seg0.ston'. 'seg0.data' } do: [ :fileName |
self assert: (imageFile hasChildrenMatching: fileName) ]
]