mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
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291 lines
9.4 KiB
C
291 lines
9.4 KiB
C
/** @file
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OcTemplateLib
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Copyright (c) 2018, vit9696
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All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef OC_TEMPLATE_LIB_H
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#define OC_TEMPLATE_LIB_H
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#include <Library/BaseMemoryLib.h>
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//
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// Common structor prototype.
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//
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typedef
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VOID
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(*OC_STRUCTOR) (
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VOID *Ptr,
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UINT32 Size
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);
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//
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// Private primitives for type generations
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//
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#define PRIV_OC_STRUCTOR_IGNORE(...)
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#define PRIV_OC_STRUCTOR_EXPAND(...) __VA_ARGS__
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#define PRIV_OC_SELECT_NEXT_INNER(Dummy, Next, ...) Next
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//
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// Without this layer of indirection, MSVC evaluates __VA_ARGS__ early and
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// PRIV_OC_SELECT_NEXT_INNER receives only two arguments, the second always
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// being Unused as per PRIV_OC_SELECT_NEXT.
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//
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#define PRIV_OC_SELECT_NEXT_INNER_INDIR(...) PRIV_OC_SELECT_NEXT_INNER __VA_ARGS__
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#define PRIV_OC_SELECT_NEXT(...) PRIV_OC_SELECT_NEXT_INNER_INDIR((__VA_ARGS__, Unused))
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#define PRIV_OC_REMOVE_NEXT(...) , do { } while (0),
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#define PRIV_OC_DECLARE_STRUCT_MEMBER(Type, Name, Suffix, Constructor, Destructor) \
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Type Name Suffix;
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#define PRIV_OC_CONSTRUCT_STRUCT_MEMBER(Type, Name, Suffix, Constructor, Destructor) \
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.Name = Constructor,
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#define PRIV_OC_DESTRUCT_STRUCT_MEMBER(Type, Name, Suffix, Constructor, Destructor) \
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PRIV_OC_SELECT_NEXT(PRIV_OC_REMOVE_NEXT Destructor, Destructor(&Obj->Name, sizeof (Type Suffix)));
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#define PRIV_OC_INVOKE_DESTRUCTOR(Destructor, Obj, Size) \
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PRIV_OC_SELECT_NEXT(PRIV_OC_REMOVE_NEXT Destructor, Destructor(Obj, Size))
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#define PRIV_NO_KEY_TYPE UINT8
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//
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// Declare structure type NAME. Construction and destruction interfaces will also be
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// available with corresponding prototypes:
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// VOID NAME_CONSTRUCT(Void *Ptr, UINTN Size);
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// VOID NAME_DESTRUCT(Void *Ptr, UINTN Size);
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//
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// Field information will be retrieved from NAME_FIELDS X-Macro, written as follows:
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#if 0
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#define NAME_FIELDS(_, __) \
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_(Type, Name, Type Suffix, __(Constant Initializer), Destructor Function) \
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_(Type, Name, Type Suffix, OC_CONSTR(Type, _, __), OC_DESTR(Type))
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#endif
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//
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#define OC_DECLARE(Name) \
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typedef struct Name ## _ { \
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Name ## _FIELDS (PRIV_OC_DECLARE_STRUCT_MEMBER, PRIV_OC_STRUCTOR_IGNORE) \
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} Name; \
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VOID Name ## _CONSTRUCT(VOID *Ptr, UINT32 Size); \
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VOID Name ## _DESTRUCT(VOID *Ptr, UINT32 Size);
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//
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// Generate constructors and destructors for structure type NAME.
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// Second argument permits to do extra actions prior to field destruction.
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// Pass () to the second argument to ignore this option.
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//
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#define OC_STRUCTORS(Name, Destructor) \
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VOID Name ## _CONSTRUCT(VOID *Ptr, UINT32 Size) { \
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STATIC Name Obj = { \
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Name ## _FIELDS(PRIV_OC_CONSTRUCT_STRUCT_MEMBER, PRIV_OC_STRUCTOR_EXPAND) \
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}; \
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CopyMem (Ptr, &Obj, sizeof (Name)); \
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} \
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VOID Name ## _DESTRUCT(VOID *Ptr, UINT32 Size) { \
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Name *Obj = (Name *) Ptr; (VOID) Obj; \
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PRIV_OC_INVOKE_DESTRUCTOR(Destructor, Obj, sizeof (Name)); \
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Name ## _FIELDS(PRIV_OC_DESTRUCT_STRUCT_MEMBER, PRIV_OC_STRUCTOR_EXPAND) \
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}
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//
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// Use previously defined structure constructor or destructor
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// FIXME: We need to use these recursively, and normally one would implement
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// it with deferred execution, like this:
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// #define OC_CONSTR_REAL(A, _, __) ({A ## _FIELDS(_, __)})
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// #define OC_CONSTR_REAL_ID() OC_CONSTR_REAL
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// #define OC_CONSTR DEFER(OC_CONSTR_REAL_ID)()
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// However, this will not work in this exact case, as _, which itself is a macro,
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// changes the expansion order. The right fix here is to entirely remove the mess
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// and use external tool for template generation.
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//
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#define OC_CONSTR(A, _, __) {A ## _FIELDS(_, __)}
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#define OC_CONSTR1(A, _, __) {A ## _FIELDS(_, __)}
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#define OC_CONSTR2(A, _, __) {A ## _FIELDS(_, __)}
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#define OC_CONSTR3(A, _, __) {A ## _FIELDS(_, __)}
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#define OC_CONSTR5(A, _, __) {A ## _FIELDS(_, __)}
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#define OC_DESTR(A) A ## _DESTRUCT
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//
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// Generate array-like blob (string, data, metadata) of type Type,
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// Count static size, MaxSize is real size, and default value Default.
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//
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#define OC_BLOB(Type, Count, Default, _, __) \
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_(UINT32 , Size , , 0 , OcZeroField ) \
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_(UINT32 , MaxSize , , sizeof (Type Count) , OcZeroField ) \
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_(Type * , DynValue , , NULL , OcFreePointer ) \
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_(Type , Value , Count , __(Default) , () )
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#define OC_BLOB_STRUCTORS(Name) \
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OC_STRUCTORS(Name, ())
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#define OC_BLOB_CONSTR(Type, Constructor, SizeConstructor, _, __) \
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__({.Size = SizeConstructor, .MaxSize = sizeof (((Type *)0)->Value), .DynValue = NULL, .Value = Constructor})
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//
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// Generate map-like container with key elements of type KeyType, OC_BLOB derivative,
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// value types of Type constructed by Constructor and destructed by Destructor:
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#if 0
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#define CONT_FIELDS(_, __) \
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OC_MAP (KEY, ELEM, _, __)
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OC_DECLARE (CONT)
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#endif
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//
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#define OC_MAP(KeyType, Type, _, __) \
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_(UINT32 , Count , , 0 , () ) \
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_(UINT32 , AllocCount , , 0 , () ) \
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_(OC_STRUCTOR , Construct , , Type ## _CONSTRUCT , () ) \
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_(OC_STRUCTOR , Destruct , , Type ## _DESTRUCT , () ) \
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_(Type ** , Values , , NULL , () ) \
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_(UINT32 , ValueSize , , sizeof (Type) , () ) \
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_(UINT32 , KeySize , , sizeof (KeyType) , () ) \
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_(OC_STRUCTOR , KeyConstruct , , KeyType ## _CONSTRUCT , () ) \
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_(OC_STRUCTOR , KeyDestruct , , KeyType ## _DESTRUCT , () ) \
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_(KeyType ** , Keys , , NULL , () )
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#define OC_MAP_STRUCTORS(Name) \
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OC_STRUCTORS(Name, OcFreeMap)
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//
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// Generate array-like container with elements of type Type, constructed
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// by Constructor and destructed by Destructor.
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#if 0
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#define CONT_FIELDS(_, __) \
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OC_ARRAY (ELEM, _, __)
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OC_DECLARE (CONT)
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#endif
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//
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#define OC_ARRAY(Type, _, __) \
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_(UINT32 , Count , , 0 , () ) \
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_(UINT32 , AllocCount , , 0 , () ) \
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_(OC_STRUCTOR , Construct , , Type ## _CONSTRUCT , () ) \
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_(OC_STRUCTOR , Destruct , , Type ## _DESTRUCT , () ) \
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_(Type ** , Values , , NULL , () ) \
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_(UINT32 , ValueSize , , sizeof (Type) , () )
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#define OC_ARRAY_STRUCTORS(Name) \
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OC_STRUCTORS(Name, OcFreeArray)
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//
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// Free dynamically allocated memory if non NULL.
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// Note, that the first argument is actually VOID **.
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//
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VOID
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OcFreePointer (
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VOID *Pointer,
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UINT32 Size
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);
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//
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// Zero field memory.
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//
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VOID
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OcZeroField (
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VOID *Pointer,
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UINT32 Size
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);
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//
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// Do not invoke any actions at destruction.
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//
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VOID
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OcDestructEmpty (
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VOID *Pointer,
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UINT32 Size
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);
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//
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// OC_MAP-like destructor.
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//
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VOID
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OcFreeMap (
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VOID *Pointer,
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UINT32 Size
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);
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//
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// OC_ARRAY-like destructor.
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//
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VOID
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OcFreeArray (
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VOID *Pointer,
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UINT32 Size
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);
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//
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// Prepare memory for blob at Pointer to contain Size bytes.
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// Assignable size may be returned via OutSize.
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// This method guarantees not to overwrite "Default" value,
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// but may destroy the previous value.
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// NULL is returned on allocation failure.
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//
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VOID *
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OcBlobAllocate (
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VOID *Pointer,
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UINT32 Size,
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UINT32 **OutSize OPTIONAL
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);
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//
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// Obtain blob value
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//
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#define OC_BLOB_GET(Blob) (((Blob)->DynValue) != NULL ? ((Blob)->DynValue) : ((Blob)->Value))
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//
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// Insert new empty element into the OC_MAP or OC_ARRAY, depending
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// on Key value.
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//
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BOOLEAN
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OcListEntryAllocate (
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VOID *Pointer,
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VOID **Value,
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VOID **Key
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);
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//
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// Some useful generic types
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// OC_STRING - implements support for resizable ASCII strings.
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// OC_DATA - implements support for resizable data blobs.
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// OC_ASSOC - implements support for maps with ASCII keys and data values.
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//
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#define OC_STRING_FIELDS(_, __) \
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OC_BLOB (CHAR8, [64], {0}, _, __)
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OC_DECLARE (OC_STRING)
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#define OC_STRING_CONSTR(Constructor, _, __) \
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OC_BLOB_CONSTR (OC_STRING, __(Constructor), sizeof (Constructor), _, __)
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#define OC_ESTRING_CONSTR(_, __) \
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OC_BLOB_CONSTR (OC_STRING, __(""), 0, _, __)
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#define OC_DATA_FIELDS(_, __) \
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OC_BLOB (UINT8, [64], {0}, _, __)
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OC_DECLARE (OC_DATA)
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#define OC_EDATA_CONSTR(_, __) \
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OC_BLOB_CONSTR (OC_DATA, __({0}), 0, _, __)
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#define OC_DATA_CONSTR(Constructor, _, __) \
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OC_BLOB_CONSTR (OC_DATA, __(Constructor), sizeof ((UINT8[]) Constructor), _, __)
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#define OC_ASSOC_FIELDS(_, __) \
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OC_MAP (OC_STRING, OC_DATA, _, __)
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OC_DECLARE (OC_ASSOC)
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#endif // OC_TEMPLATE_LIB_H
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