dotscope 0.6.0

A high-performance, cross-platform framework for analyzing and reverse engineering .NET PE executables
Documentation 
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//! `ImportScope` table loader for metadata processing
//!
//! This module provides the [`ImportScopeLoader`] implementation for processing
//! `ImportScope` table data during metadata loading. The loader handles parallel
//! processing and integration with the broader loader context.

use crate::{
    metadata::{
        diagnostics::DiagnosticCategory,
        loader::{LoaderContext, MetadataLoader},
        tables::TableId,
    },
    Result,
};

/// Loader for the `ImportScope` metadata table
///
/// Implements [`MetadataLoader`] to process the `ImportScope` table (0x35)
/// which defines the import scopes that organize imported namespaces and types
/// in Portable PDB format. Import scopes enable hierarchical organization of
/// debugging information for namespace resolution and type lookup.
///
/// # Processing Strategy
///
/// The loader uses parallel processing to efficiently handle import scope entries,
/// resolving blob heap references to decode import declarations and building the
/// complete scope hierarchy for runtime debugging support.
///
/// # Dependencies
///
/// This loader depends on the #Blob heap being available in the loader context
/// for resolving import declarations and nested scope data.
///
/// # Reference
/// * [Portable PDB Format - ImportScope Table](https://github.com/dotnet/core/blob/main/Documentation/diagnostics/portable_pdb.md#importscope-table-0x35)
pub struct ImportScopeLoader;

impl MetadataLoader for ImportScopeLoader {
    fn load(&self, context: &LoaderContext) -> Result<()> {
        let (Some(header), Some(blobs)) = (context.meta, context.blobs) else {
            return Ok(());
        };
        let Some(table) = header.table::<crate::metadata::tables::ImportScopeRaw>() else {
            return Ok(());
        };

        table.par_iter().try_for_each(|row| {
            let token_msg = || format!("import scope 0x{:08x}", row.token.value());

            let Some(import_scope) =
                context.handle_result(row.to_owned(blobs), DiagnosticCategory::Table, token_msg)?
            else {
                return Ok(());
            };

            context
                .import_scope
                .insert(import_scope.token, import_scope);
            Ok(())
        })
    }

    fn table_id(&self) -> Option<TableId> {
        Some(TableId::ImportScope)
    }

    fn dependencies(&self) -> &'static [TableId] {
        &[]
    }
}