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FFIGen.pck.st
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FFIGen.pck.st
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'From Cuis 5.0 [latest update: #3866] on 12 October 2019 at 7:17:51 pm'!
'Description Automatic FFI generator from c2ffi.
Author: Mariano Montone <marianomontone@gmail.com>
See: https://github.com/rpav/c2ffi'!
!provides: 'FFIGen' 1 26!
!requires: 'FFI' 1 33 nil!
!requires: 'JSON' 1 19 nil!
SystemOrganization addCategory: #FFIGen!
!classDefinition: #FFIGenerator category: #FFIGen!
Object subclass: #FFIGenerator
instanceVariableNames: 'libraryName className categoryName outputFile inputFile autogeneratedMessage json outputStream removePrefix'
classVariableNames: ''
poolDictionaries: ''
category: 'FFIGen'!
!classDefinition: 'FFIGenerator class' category: #FFIGen!
FFIGenerator class
instanceVariableNames: ''!
!classDefinition: #SimpleFFIGenerator category: #FFIGen!
FFIGenerator subclass: #SimpleFFIGenerator
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'FFIGen'!
!classDefinition: 'SimpleFFIGenerator class' category: #FFIGen!
SimpleFFIGenerator class
instanceVariableNames: ''!
!classDefinition: #SmalltalkWriter category: #FFIGen!
Object subclass: #SmalltalkWriter
instanceVariableNames: 'stream indentation indentSize'
classVariableNames: ''
poolDictionaries: ''
category: 'FFIGen'!
!classDefinition: 'SmalltalkWriter class' category: #FFIGen!
SmalltalkWriter class
instanceVariableNames: ''!
!SimpleFFIGenerator commentStamp: 'MM 10/11/2019 23:11:17' prior: 0!
Opinionated FFI generator.
Examples:
SimpleFFIGenerator new
inputFile: '/home/marian/src/Cuis/mold/cairo-ffi.json';
outputFile: '/home/marian/src/Cuis/mold/CairoFFI.st';
className: #CairoFFI;
categoryName: 'Cairo';
libraryName: 'libcairo';
removePrefix: 'cairo_';
generate.
SimpleFFIGenerator new
inputFile: '/home/marian/src/Cuis/mold/nanovg-ffi.json';
outputFile: '/home/marian/src/Cuis/mold/NanoVGFFI.st';
className: #NanoVG;
categoryName: 'NanoVG';
libraryName: 'nanovg';
removePrefix: 'nvg';
generate.!
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 18:51:16'!
autogeneratedMessage
"Answer the value of autogeneratedMessage"
^ autogeneratedMessage! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 18:51:16'!
autogeneratedMessage: anObject
"Set the value of autogeneratedMessage"
autogeneratedMessage _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 18:48:00'!
categoryName
"Answer the value of categoryName"
^ categoryName! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 18:48:00'!
categoryName: anObject
"Set the value of categoryName"
categoryName _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 18:48:00'!
className: anObject
"Set the value of className"
className _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 16:46:42'!
inputFile
"Answer the value of inputFile"
^ inputFile! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 16:46:42'!
inputFile: anObject
"Set the value of inputFile"
inputFile _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 23:06:50'!
json
"Answer the value of json"
^ json! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 23:06:50'!
json: anObject
"Set the value of json"
json _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 16:45:52'!
libraryName
"Answer the value of libraryName"
^ libraryName! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 16:45:52'!
libraryName: anObject
"Set the value of libraryName"
libraryName _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 16:45:52'!
outputFile
"Answer the value of outputFile"
^ outputFile! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 16:45:52'!
outputFile: anObject
"Set the value of outputFile"
outputFile _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 23:06:50'!
outputStream
"Answer the value of outputStream"
^ outputStream! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 23:06:50'!
outputStream: anObject
"Set the value of outputStream"
outputStream _ anObject! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 23:06:50'!
removePrefix
"Answer the value of removePrefix"
^ removePrefix! !
!FFIGenerator methodsFor: 'accessing' stamp: 'MM 10/11/2019 23:06:50'!
removePrefix: anObject
"Set the value of removePrefix"
removePrefix _ anObject! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 20:20:42'!
asCamelCase: aString
"Answer a new String, without any whitespace, and with words capitalized (Except for the first one)
' how do you do? ' asCamelCase
"
^ String streamContents: [ :outStream | | inStream capitalize wroteSome |
wroteSome _ false.
capitalize _ false.
inStream _ aString readStream.
[ inStream atEnd ] whileFalse: [ | c |
c _ inStream next.
c = $_
ifTrue: [ capitalize _ true ]
ifFalse: [
capitalize & wroteSome ifTrue: [ c _ c asUppercase ].
outStream nextPut: c.
wroteSome _ true.
capitalize _ false ]]]! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:05:26'!
finishGeneration: aStream
! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:36:16'!
generate
json _ Json readFrom: inputFile asFileEntry readStream.
outputFile asFileEntry writeStreamDo: [:s |
outputStream _ SmalltalkWriter on: s.
json explore.
self startGeneration: outputStream.
json do: [:val | |methodName|
methodName _ ('generate', val tag capitalized, ':on:') asSymbol.
self perform: methodName withArguments: {val. outputStream}].
self finishGeneration: outputStream.
s contents asText edit.
s close].! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:04:04'!
generateEnum: definition on: aStream! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:01:13'!
generateFunction: aFunction on: aStream
! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:03:39'!
generateStruct: definition on: aStream! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:01:41'!
generateTypedef: aTypedef on: aStream! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:04:21'!
generateUnion: definition on: aStream! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 23:09:29'!
initialize
autogeneratedMessage _ 'This was autogenerated by FFIGen'.
removePrefix _ ''! !
!FFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:17:55'!
startGeneration: aStream
! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 22:54:05'!
findType: aType
^ json detect: [:x | x name = aType] ifNone: [self error: 'Invalid type: ', aType] ! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/12/2019 18:58:21'!
generateEnum: definition on: aStream
definition fields do: [:field |
self generateEnumValue: field on: aStream]! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/12/2019 19:06:49'!
generateEnumValue: anEnumValue on: aStream
aStream wl: '!!', className, ' class methodsFor: ''ffi-enums'' !!';
wl: (self asCamelCase: anEnumValue name asLowercase capitalized);
wl: '"', autogeneratedMessage , '"'; newLine;
indentedDo: [
aStream wl: '^ ', anEnumValue value asString, ' !! !! ']! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 22:25:25'!
generateFunction: aFunction on: aStream
|returnType|
returnType _ aFunction at: 'return-type'.
aStream wl: '!!', className, ' class methodsFor: ''ffi-functions'' !!';
wl: (self methodDefFor: aFunction);
indentedDo: [
aStream wl: '"', autogeneratedMessage , '"'; newLine;
w: '<cdecl: ';
w: (self getFFIType: returnType).
aStream w: ' ''', aFunction name , ''' ('.
aFunction parameters do: [:param |
aStream nextPutAll: (self getFFIType: param type).
aStream nextPut: Character space].
aStream wl: ') module: ''', libraryName, '''>';
wl: '^ self externalCallFailed !! !!'; newLine]
! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 22:33:05'!
getFFIPointerType: aType
^ (self getFFIType: aType type) , '*'! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/12/2019 19:17:47'!
getFFIType: aType
|typeSymbol|
typeSymbol _ aType tag allButFirst asString asSymbol.
^ typeSymbol caseOf: {
[#int] -> ['long'].
[#void] -> ['void'].
[#'unsigned-int'] -> ['ushort'].
[#'unsigned-long'] -> ['ulong'].
[#float] -> ['float'].
[#double] -> ['double'].
[#char] -> ['schar'].
[#'unsigned-char'] -> ['char'].
[#pointer] -> [self getFFIPointerType: aType].
} otherwise: [self getNonPrimitiveFFIType: aType]
! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 22:59:58'!
getNonPrimitiveFFIType: aType
"^ aType tag"
"Simplifcation: An object pointer or an enum"
|type|
type _ self findType: aType tag.
type tag = 'typedef' ifTrue: [type _ type type].
^ type tag caseOf: {
[':enum'] -> ['ushort'].
[':struct'] -> ['void'].
['enum'] -> ['ushort'].
['struct'] -> ['void'].
[':function-pointer'] -> ['void*']}
otherwise: [self getFFIType: type]! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/12/2019 19:07:24'!
methodDefFor: aFunction
^ (String streamContents: [:s |
s nextPutAll: (self asCamelCase: (aFunction name withoutPrefix: removePrefix) uncapitalized) .
aFunction parameters ifNotEmpty: [
s nextPutAll: ': ', (self asCamelCase: aFunction parameters first name).
aFunction parameters allButFirst do: [:param |
s nextPutAll: ' ', (self asCamelCase: param name), ': ', (self asCamelCase: param name)]
]]) asSymbol! !
!SimpleFFIGenerator methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 20:02:20'!
startGeneration: aStream
aStream w: '!!classDefinition: #', className, ' category: #', categoryName, '!!'; newLine.
aStream wl: 'Object subclass: #', className;
indentedDo: [
aStream wl: 'instanceVariableNames: ''''';
wl: 'classVariableNames: ''''';
wl: 'poolDictionaries: ''''';
wl: 'category: ''', categoryName, '''!!'; newLine; newLine].
aStream w: '!!classDefinition: #', className, ' class category: #', categoryName, '!!'; newLine.
aStream wl: className, ' class instanceVariableNames: '''' !!'; newLine; newLine. ! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:21:37'!
cr
self newLine! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:23:35'!
indent
indentation timesRepeat: [stream nextPut: Character space].! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:23:40'!
indentedDo: aBlock
indentation _ indentation + indentSize.
self indent.
aBlock value.
indentation _ indentation - indentSize! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:13:12'!
initialize: aStream
stream _ aStream.
indentation _ 0.
indentSize _ 4.! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:23:30'!
newLine
stream newLine.
self indent.! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:11:07'!
nextPut: aChar
stream nextPut: aChar! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:20:17'!
nextPutAll: aString
stream nextPutAll: aString! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:13:27'!
w: aString
self writeString: aString! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:14:42'!
wl: aString
self writeLine: aString! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:21:45'!
writeLine: aString
stream nextPutAll: aString. self newLine.! !
!SmalltalkWriter methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:13:54'!
writeString: aString
stream nextPutAll: aString! !
!SmalltalkWriter class methodsFor: 'as yet unclassified' stamp: 'MM 10/11/2019 19:10:42'!
on: aStream
^ self new initialize: aStream! !