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|
#![allow(unused_macros)]
// vendored from the cfg-if crate to avoid breaking ctest
macro_rules! cfg_if {
// match if/else chains with a final `else`
($(
if #[cfg($($meta:meta),*)] { $($it:item)* }
) else * else {
$($it2:item)*
}) => {
cfg_if! {
@__items
() ;
$( ( ($($meta),*) ($($it)*) ), )*
( () ($($it2)*) ),
}
};
// match if/else chains lacking a final `else`
(
if #[cfg($($i_met:meta),*)] { $($i_it:item)* }
$(
else if #[cfg($($e_met:meta),*)] { $($e_it:item)* }
)*
) => {
cfg_if! {
@__items
() ;
( ($($i_met),*) ($($i_it)*) ),
$( ( ($($e_met),*) ($($e_it)*) ), )*
( () () ),
}
};
// Internal and recursive macro to emit all the items
//
// Collects all the negated cfgs in a list at the beginning and after the
// semicolon is all the remaining items
(@__items ($($not:meta,)*) ; ) => {};
(@__items ($($not:meta,)*) ; ( ($($m:meta),*) ($($it:item)*) ), $($rest:tt)*) => {
// Emit all items within one block, applying an appropriate #[cfg]. The
// #[cfg] will require all `$m` matchers specified and must also negate
// all previous matchers.
cfg_if! { @__apply cfg(all($($m,)* not(any($($not),*)))), $($it)* }
// Recurse to emit all other items in `$rest`, and when we do so add all
// our `$m` matchers to the list of `$not` matchers as future emissions
// will have to negate everything we just matched as well.
cfg_if! { @__items ($($not,)* $($m,)*) ; $($rest)* }
};
// Internal macro to Apply a cfg attribute to a list of items
(@__apply $m:meta, $($it:item)*) => {
$(#[$m] $it)*
};
}
macro_rules! stack {
($t:ident) => {
cfg_if! {
if #[cfg(ossl110)] {
pub enum $t {}
} else {
#[repr(C)]
pub struct $t {
pub stack: $crate::_STACK,
}
}
}
};
}
// openssl changes `*mut` to `*const` in certain parameters in certain versions;
// in C this is ABI and (mostly) API compatible.
//
// We need to handle this explicitly, and this macro helps annotate which
// parameter got converted in which version.
//
// Input is:
// extern "C" {
// #[attributes...]
// pub fn name(args) -> rettype; // `-> rettype` optional
// // more functions...
// }
//
// This macro replaces `#[const_ptr_if(...)]` in types with `*const` or `*mut`
// (depending on the inner cfg flags)
//
// Walks through all argument and return types, but only finds inner types of
// `*const` and `*mut`; doesn't walk arrays or generics.
//
// NOTE: can't abstract `pub` as `$fn_vis:vis`, as ctest macro handling doesn't
// support it (old syntax crate). But we really only need `pub` anyway.
//
// NOTE: ctest seams to simply ignore macros it can't expand (whatever the
// reason)
macro_rules! const_ptr_api {
// ----------------------------------------------------------------
// (partialarg): partial argument, waiting for "final" argument type
// MAGIC PART 1: hande conditional const ptr in argument type
( (partialarg)
{ $(#[$fn_attr:meta])* pub fn $fn_name:ident }
$args_packed:tt
[ $($part_arg:tt)* ]
[ #[const_ptr_if( $($cfg:tt)* )] $($arg_rem:tt)* ]
$ret_packed:tt
) => {
const_ptr_api!( (partialarg) { #[cfg($($cfg)*)] $(#[$fn_attr])* pub fn $fn_name } $args_packed [ $($part_arg)* *const ] [ $($arg_rem)* ] $ret_packed );
const_ptr_api!( (partialarg) { #[cfg(not($($cfg)*))] $(#[$fn_attr])* pub fn $fn_name } $args_packed [ $($part_arg)* *mut ] [ $($arg_rem)* ] $ret_packed );
};
// continue partial argument with `*mut` pointer (might need special const handling in inner type)
( (partialarg)
$def_packed:tt
$args_packed:tt
[ $($part_arg:tt)* ]
[ *mut $($arg_rem:tt)* ]
$ret_packed:tt
) => {
const_ptr_api!( (partialarg) $def_packed $args_packed [ $($part_arg)* *mut ] [ $($arg_rem)* ] $ret_packed );
};
// continue partial argument with `*const` pointer (might need special const handling in inner type)
( (partialarg)
$def_packed:tt
$args_packed:tt
[ $($part_arg:tt)* ]
[ *const $($arg_rem:tt)* ]
$ret_packed:tt
) => {
const_ptr_api!( (partialarg) $def_packed $args_packed [ $($part_arg)* *const ] [ $($arg_rem)* ] $ret_packed );
};
// finish partial argument with trailing comma
( (partialarg)
$def_packed:tt
{ $($args_tt:tt)* }
[ $($part_arg:tt)* ]
[ $arg_ty:ty, $($arg_rem:tt)* ]
$ret_packed:tt
) => {
const_ptr_api!( (parseargs) $def_packed { $($args_tt)* { $($part_arg)* $arg_ty } } [ $($arg_rem)* ] $ret_packed );
};
// finish final partial argument (no trailing comma)
( (partialarg)
$def_packed:tt
{ $($args_tt:tt)* }
[ $($part_arg:tt)* ]
[ $arg_ty:ty ]
$ret_packed:tt
) => {
const_ptr_api!( (parseargs) $def_packed { $($args_tt)* { $($part_arg)* $arg_ty } } [ ] $ret_packed );
};
// ----------------------------------------------------------------
// (parseargs): parsing arguments
// start next argument
( (parseargs)
$def_packed:tt
$args_packed:tt
[ $arg_name:ident : $($arg_rem:tt)* ]
$ret_packed:tt
) => {
const_ptr_api!( (partialarg) $def_packed $args_packed [ $arg_name: ] [ $($arg_rem)* ] $ret_packed );
};
// end of arguments, there is a return type; start parsing it
( (parseargs)
$def_packed:tt
$args_packed:tt
[ ]
[ -> $($rem:tt)* ]
) => {
const_ptr_api!( (partialret) $def_packed $args_packed [] [ $($rem)* ] );
};
// end of arguments, no return type
( (parseargs)
$def_packed:tt
$args_packed:tt
[ ]
[ ]
) => {
const_ptr_api!( (generate) $def_packed $args_packed { () } );
};
// ----------------------------------------------------------------
// (partialret): have partial return type, waiting for final return type
// MAGIC PART 2: hande conditional const ptr in return type
( (partialret)
{ $(#[$fn_attr:meta])* pub fn $fn_name:ident }
$args_packed:tt
[ $($part_ret:tt)* ]
[ #[const_ptr_if( $($cfg:tt)* )] $($rem:tt)* ]
) => {
const_ptr_api!( (partialret) { #[cfg($($cfg)*)] $(#[$fn_attr])* pub fn $fn_name } $args_packed [ $($part_ret)* *const ] [ $($rem)* ] );
const_ptr_api!( (partialret) { #[cfg(not($($cfg)*))] $(#[$fn_attr])* pub fn $fn_name } $args_packed [ $($part_ret)* *mut ] [ $($rem)* ] );
};
// `* mut` part in return type; continue parsing to find inner conditional const ptr
( (partialret)
$def_packed:tt
$args_packed:tt
[ $($part_ret:tt)* ]
[ *mut $($rem:tt)* ]
) => {
const_ptr_api!( (partialret) $def_packed $args_packed [ $($part_ret)* *mut ] [ $($rem)* ] );
};
// `* const` part in return type; continue parsing to find inner conditional const ptr
( (partialret)
$def_packed:tt
$args_packed:tt
[ $($part_ret:tt)* ]
[ *const $($rem:tt)* ]
) => {
const_ptr_api!( (partialret) $def_packed $args_packed [ $($part_ret)* *const ] [ $($rem)* ] );
};
// final part of return type
( (partialret)
$def_packed:tt
$args_packed:tt
[ $($part_ret:tt)* ]
[ $ret_ty:ty ]
) => {
const_ptr_api!( (generate) $def_packed $args_packed { $($part_ret)* $ret_ty } );
};
// ----------------------------------------------------------------
// generate
( (generate)
{ $(#[$fn_attr:meta])* pub fn $fn_name:ident }
{ $({ $arg_name:ident: $($arg_ty:tt)* })* }
{ $ret_ty:ty }
) => {
extern "C" {
$(#[$fn_attr])*
pub fn $fn_name( $(
$arg_name: $($arg_ty)*
),* ) -> $ret_ty;
}
};
// ----------------------------------------------------------------
// (fn): gather tokens for return type until ";"
// found end; start parsing current function, and parse remaining functions
( (fn)
$def_packed:tt
$arg_tts_packed:tt
$ret_packed:tt
[ ; $($rem:tt)* ]
) => {
const_ptr_api!( (parseargs) $def_packed {} $arg_tts_packed $ret_packed );
const_ptr_api!( (extern) [ $($rem)* ] );
};
// not ";" - all other tokens are part of the return type.
// don't expand return type yet; otherwise we'd have to remember in which branch `rem` needs
// to be used to parse further functions.
( (fn)
$def_packed:tt
$arg_tts_packed:tt
[ $($ret_tt:tt)* ]
[ $tt:tt $($rem:tt)* ]
) => {
const_ptr_api!( (fn) $def_packed $arg_tts_packed [ $($ret_tt)* $tt ] [ $($rem)* ] );
};
// ----------------------------------------------------------------
// (extern): in extern block, find next function
// try to split into functions as fast as possible to reduce recursion depth
( (extern) [
$(#[$fn_attr:meta])*
pub fn $fn_name:ident( $($arg_rem:tt)* ) $($rem:tt)*
] ) => {
const_ptr_api!( (fn)
{ $(#[$fn_attr])* pub fn $fn_name } [ $($arg_rem)* ] [] [ $($rem)* ]
);
};
// end of extern block
( (extern) [] ) => {};
// ----------------------------------------------------------------
// macro start; find extern block
( extern "C" { $($rem:tt)* } ) => {
const_ptr_api!( (extern) [ $($rem)* ] );
};
}
|
