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//! Standalone environment for WebAssembly using Cranelift. Provides functions to translate
//! `get_global`, `set_global`, `memory.size`, `memory.grow`, `call_indirect` that hardcode in
//! the translation the base addresses of regions of memory that will hold the globals, tables and
//! linear memories.

#![deny(missing_docs, trivial_numeric_casts, unused_extern_crates)]
#![warn(unused_import_braces)]
#![cfg_attr(feature = "clippy", plugin(clippy(conf_file = "../../clippy.toml")))]
#![cfg_attr(
    feature = "cargo-clippy",
    allow(clippy::new_without_default, clippy::new_without_default)
)]
#![cfg_attr(
    feature = "cargo-clippy",
    warn(
        clippy::float_arithmetic,
        clippy::mut_mut,
        clippy::nonminimal_bool,
        clippy::option_map_unwrap_or,
        clippy::option_map_unwrap_or_else,
        clippy::print_stdout,
        clippy::unicode_not_nfc,
        clippy::use_self
    )
)]

mod address_map;
mod compilation;
mod data_structures;
mod func_environ;
mod module;
mod module_environ;
mod tunables;
mod vmoffsets;

mod cache;

pub mod cranelift;
#[cfg(feature = "lightbeam")]
pub mod lightbeam;

pub use crate::address_map::{
    FunctionAddressMap, InstructionAddressMap, ModuleAddressMap, ModuleMemoryOffset,
    ModuleVmctxInfo, ValueLabelsRanges,
};
pub use crate::cache::create_new_config as cache_create_new_config;
pub use crate::cache::CacheConfig;
pub use crate::compilation::{
    Compilation, CompileError, CompiledFunction, Compiler, Relocation, RelocationTarget,
    Relocations, StackMapInformation, StackMaps, TrapInformation, Traps,
};
pub use crate::cranelift::Cranelift;
pub use crate::data_structures::*;
pub use crate::func_environ::BuiltinFunctionIndex;
#[cfg(feature = "lightbeam")]
pub use crate::lightbeam::Lightbeam;
pub use crate::module::{
    EntityIndex, MemoryPlan, MemoryStyle, Module, ModuleLocal, TableElements, TablePlan, TableStyle,
};
pub use crate::module_environ::{
    translate_signature, DataInitializer, DataInitializerLocation, FunctionBodyData,
    ModuleEnvironment, ModuleTranslation,
};
pub use crate::tunables::Tunables;
pub use crate::vmoffsets::{TargetSharedSignatureIndex, VMOffsets, INTERRUPTED};

/// WebAssembly page sizes are defined to be 64KiB.
pub const WASM_PAGE_SIZE: u32 = 0x10000;

/// The number of pages we can have before we run out of byte index space.
pub const WASM_MAX_PAGES: u32 = 0x10000;

/// Version number of this crate.
pub const VERSION: &str = env!("CARGO_PKG_VERSION");

pub(crate) fn reference_type(
    wasm_ty: cranelift_wasm::WasmType,
    pointer_type: ir::Type,
) -> ir::Type {
    match wasm_ty {
        cranelift_wasm::WasmType::FuncRef => pointer_type,
        cranelift_wasm::WasmType::ExternRef => match pointer_type {
            ir::types::I32 => ir::types::R32,
            ir::types::I64 => ir::types::R64,
            _ => panic!("unsupported pointer type"),
        },
        _ => panic!("unsupported Wasm reference type"),
    }
}

/// Iterates through all `LibCall` members and all runtime exported functions.
#[macro_export]
macro_rules! for_each_libcall {
    ($op:ident) => {
        $op![
            (UdivI64, wasmtime_i64_udiv),
            (UdivI64, wasmtime_i64_udiv),
            (SdivI64, wasmtime_i64_sdiv),
            (UremI64, wasmtime_i64_urem),
            (SremI64, wasmtime_i64_srem),
            (IshlI64, wasmtime_i64_ishl),
            (UshrI64, wasmtime_i64_ushr),
            (SshrI64, wasmtime_i64_sshr),
            (CeilF32, wasmtime_f32_ceil),
            (FloorF32, wasmtime_f32_floor),
            (TruncF32, wasmtime_f32_trunc),
            (NearestF32, wasmtime_f32_nearest),
            (CeilF64, wasmtime_f64_ceil),
            (FloorF64, wasmtime_f64_floor),
            (TruncF64, wasmtime_f64_trunc),
            (NearestF64, wasmtime_f64_nearest)
        ];
    };
}