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fix: type encoding for Objective-C (#53)
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* fix: type encoding for Objective-C

* Update type_encoding.go

* fix: comment `!`, `^`, and `b`

* chore: vector references

* chore: _Float16 references

* chore: integer comments
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@t0rr3sp3dr0
t0rr3sp3dr0 authored May 2, 2024
1 parent a84fb95 commit 1989b18
Showing 1 changed file with 47 additions and 34 deletions.
81 changes: 47 additions & 34 deletions types/objc/type_encoding.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,42 +6,55 @@ import (
"unicode"
)

// ref - https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtTypeEncodings.html
// References:
// 01. https://clang.llvm.org/docs/LanguageExtensions.html#half-precision-floating-point
// 02. https://clang.llvm.org/docs/LanguageExtensions.html#vectors-and-extended-vectors
// 03. https://developer.apple.com/documentation/objectivec/bool#discussion
// 04. https://developer.apple.com/documentation/xcode/writing-arm64-code-for-apple-platforms#Handle-data-types-and-data-alignment-properly
// 05. https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtTypeEncodings.html#//apple_ref/doc/uid/TP40008048-CH100-SW1
// 06. https://developer.apple.com/library/archive/documentation/Darwin/Conceptual/64bitPorting/transition/transition.html#//apple_ref/doc/uid/TP40001064-CH207-SW1
// 07. https://gcc.gnu.org/onlinedocs/gcc/Half-Precision.html
// 08. https://gcc.gnu.org/onlinedocs/gcc/Vector-Extensions.html
// 09. https://github.com/apple-oss-distributions/clang/blob/rel/clang-800/src/tools/clang/include/clang/AST/DeclBase.h#L173-L200
// 10. https://github.com/apple-oss-distributions/clang/blob/rel/clang-800/src/tools/clang/include/clang/AST/DeclObjC.h#L698-L727
// 11. https://github.com/apple-oss-distributions/clang/blob/rel/clang-800/src/tools/clang/lib/AST/ASTContext.cpp#L5452-L5518
// 12. https://github.com/apple-oss-distributions/objc4/blob/rel/objc4-906/runtime/runtime.h#L1856-L1900
// 13. https://github.com/apple-oss-distributions/objc4/blob/rel/objc4-838/runtime/hashtable2.h#L251-L294
// 14. https://github.com/gcc-mirror/gcc/blob/releases/gcc-13.2.0/gcc/doc/objc.texi
// 15. https://github.com/gcc-mirror/gcc/blob/releases/gcc-13.2.0/gcc/objc/objc-encoding.cc
// 16. https://github.com/gcc-mirror/gcc/blob/releases/gcc-13.2.0/libobjc/objc/runtime.h#L83-L139

var typeEncoding = map[string]string{
"": "", // Nothing
"!": "/* vector */", // TODO: review
"#": "Class", // Objective-C Class
"%": "const char *", // TODO: review
"*": "char *", // C String
":": "SEL", // Objective-C Selector
"?": "void * /* unknown */", // Unknown (likely a C Function and unlikely an Objective-C Block)
"@": "id", // Objective-C Pointer
"@?": "id /* block */", // Objective-C Block Pointer
"B": "_Bool", // C Boolean
"C": "unsigned char", // Unsigned C Character
"D": "long double", // Extended-Precision C Floating-Point
"I": "unsigned int", // Unsigned C Integer
"L": "unsigned long", // Unsigned C Long Integer
"Q": "unsigned long long", // Unsigned C Long-Long Integer
"S": "unsigned short", // Unsigned C Short Integer
"T": "unsigned __int128", // Unsigned C 128-bit Integer
"^": "*", // C Pointer
"^?": "void * /* function */", // C Function Pointer
"b": ":", // C Bit Field
"c": "char", // Signed C Character or Objective-C Boolean
"d": "double", // Double-Precision C Floating-Point
"f": "float", // Single-Precision C Floating-Point
"i": "int", // Signed C Integer
"l": "long", // Signed C Long Integer
"q": "long long", // Signed C Long-Long Integer
"s": "short", // Signed C Short Integer
"t": "__int128", // Signed C 128-bit Integer
"v": "void", // C Void
// "%": "NXAtom", // TODO: review
// "Z": "int32", // TODO: review
// "w": "wchar_t", // TODO: review
// "z": "size_t", // TODO: review
"": "", // Nothing
" ": "_Float16", // Half-Precision C Floating-Point (LLVM only)
"#": "Class", // Objective-C Class
"%": "const char * /* NXAtom */", // Objective-C NXAtom (legacy Objective-C runtime only)
"*": "char *", // C String
":": "SEL", // Objective-C Selector
"?": "void * /* unknown */", // Unknown (likely a C Function and unlikely an Objective-C Block)
"@": "id", // Objective-C Pointer
"@?": "id /* block */", // Objective-C Block Pointer
"B": "_Bool", // C Boolean or Objective-C Boolean (on ARM and PowerPC)
"C": "unsigned char", // Unsigned C Character
"D": "long double", // Extended-Precision C Floating-Point (64 bits on ARM, 80 bits on Intel, and 128 bits on PowerPC)
"I": "unsigned int", // Unsigned C Integer
"L": "unsigned int32_t", // Unsigned C Long Integer (fixed to 32 bits)
"Q": "unsigned long long", // Unsigned C Long-Long Integer
"S": "unsigned short", // Unsigned C Short Integer
"T": "unsigned __int128", // Unsigned C 128-bit Integer
"^?": "void * /* function */", // C Function Pointer
"c": "signed char", // Signed C Character (fixed signedness) or Objective-C Boolean (on Intel)
"d": "double", // Double-Precision C Floating-Point
"f": "float", // Single-Precision C Floating-Point
"i": "int", // Signed C Integer
"l": "int32_t", // Signed C Long Integer (fixed to 32 bits)
"q": "long long", // Signed C Long-Long Integer
"s": "short", // Signed C Short Integer
"t": "__int128", // Signed C 128-bit Integer
"v": "void", // C Void
// "!": "", // GNU Vector (LLVM Vector is unrepresented)
// "^": "", // C Pointer
// "b": "", // C Bit Field
// "(": "", // C Union Begin
// ")": "", // C Union End
// "[": "", // C Array Begin
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