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//! Data structures to provide transformation of the source
// addresses of a WebAssembly module into the native code.

use crate::lib::std::vec::Vec;
use crate::sourceloc::SourceLoc;

/// Single source location to generated address mapping.
#[derive(rkyv::Serialize, rkyv::Deserialize, rkyv::Archive, Debug, Clone, PartialEq, Eq)]
pub struct InstructionAddressMap {
    /// Original source location.
    pub srcloc: SourceLoc,

    /// Generated instructions offset.
    pub code_offset: usize,

    /// Generated instructions length.
    pub code_len: usize,
}

/// Function and its instructions addresses mappings.
#[derive(
    rkyv::Serialize, rkyv::Deserialize, rkyv::Archive, Debug, Clone, PartialEq, Eq, Default,
)]
pub struct FunctionAddressMap {
    /// Instructions maps.
    /// The array is sorted by the InstructionAddressMap::code_offset field.
    pub instructions: Vec<InstructionAddressMap>,

    /// Function start source location (normally declaration).
    pub start_srcloc: SourceLoc,

    /// Function end source location.
    pub end_srcloc: SourceLoc,

    /// Generated function body offset if applicable, otherwise 0.
    pub body_offset: usize,

    /// Generated function body length.
    pub body_len: usize,
}