using System.Text;

namespace X86Disassembler.PE.Parsers;

/// <summary>
/// Parser for section headers in a PE file
/// </summary>
public class SectionHeaderParser : IParser<SectionHeader>
{
    /// <summary>
    /// Parse a section header from the binary reader
    /// </summary>
    /// <param name="reader">The binary reader positioned at the start of the section header</param>
    /// <returns>The parsed section header</returns>
    public SectionHeader Parse(BinaryReader reader)
    {
        SectionHeader header = new SectionHeader();
        
        // Read section name (8 bytes)
        byte[] nameBytes = reader.ReadBytes(8);
        // Convert to string, removing any null characters
        header.Name = Encoding.ASCII.GetString(nameBytes).TrimEnd('\0');
        
        header.VirtualSize = reader.ReadUInt32();
        header.VirtualAddress = reader.ReadUInt32();
        header.SizeOfRawData = reader.ReadUInt32();
        header.PointerToRawData = reader.ReadUInt32();
        header.PointerToRelocations = reader.ReadUInt32();
        header.PointerToLinenumbers = reader.ReadUInt32();
        header.NumberOfRelocations = reader.ReadUInt16();
        header.NumberOfLinenumbers = reader.ReadUInt16();
        header.Characteristics = reader.ReadUInt32();
        
        return header;
    }
}