// Generated file -- DO NOT MODIFY.
#include "{{file}}.h"

namespace {

const uint64_t header_size = 24;  // 4x uint32, 1x uint64

struct ExtPointer {
  uint32_t offset;
  uint32_t length;
};

void CheckHeader(const glcr::ByteBuffer& bytes) {
  // TODO: Check ident.
  // TODO: Parse core size.
  // TODO: Parse extension size.
  // TODO: Check CRC32
  // TODO: Parse options.
}

void WriteHeader(glcr::ByteBuffer& bytes, uint64_t offset, uint32_t core_size, uint32_t extension_size) {
  bytes.WriteAt<uint32_t>(offset + 0, 0xDEADBEEF);  // TODO: Chose a more unique ident sequence.
  bytes.WriteAt<uint32_t>(offset + 4, core_size);
  bytes.WriteAt<uint32_t>(offset + 8, extension_size);
  bytes.WriteAt<uint32_t>(offset + 12, 0); // TODO: Calculate CRC32.
  bytes.WriteAt<uint64_t>(offset + 16, 0); // TODO: Add options.
}

}  // namespace

{%- for message in messages %}
void {{message.name}}::ParseFromBytes(const glcr::ByteBuffer& bytes, uint64_t offset) {
  CheckHeader(bytes);

{%- for field in message.fields %}
  // Parse {{field.name}}.
{%- if field.type == Type.U64 %}
  set_{{field.name}}(bytes.At<uint64_t>(offset + header_size + (8 * {{loop.index0}})));
{%- elif field.type == Type.I64 %}
  set_{{field.name}}(bytes.At<int64_t>(offset + header_size + (8 * {{loop.index0}})));
{%- elif field.type == Type.STRING %}
  auto {{field.name}}_pointer = bytes.At<ExtPointer>(offset + header_size + (8 * {{loop.index0}}));

  set_{{field.name}}(bytes.StringAt(offset + {{field.name}}_pointer.offset, {{field.name}}_pointer.length));
{%- elif field.type == Type.CAPABILITY %}
  // FIXME: Implement in-buffer capabilities for inprocess serialization.
  set_{{field.name}}(0);
{%- else %}
  // TODO: Unimplemented parsing {{field.type}}
{%- endif %}
{%- endfor %}
}

void {{message.name}}::ParseFromBytes(const glcr::ByteBuffer& bytes, uint64_t offset, const glcr::CapBuffer& caps) {
  CheckHeader(bytes);

{%- for field in message.fields %}
  // Parse {{field.name}}.
{%- if field.type == Type.U64 %}
  set_{{field.name}}(bytes.At<uint64_t>(offset + header_size + (8 * {{loop.index0}})));
{%- elif field.type == Type.I64 %}
  set_{{field.name}}(bytes.At<int64_t>(offset + header_size + (8 * {{loop.index0}})));
{%- elif field.type == Type.STRING %}
  auto {{field.name}}_pointer = bytes.At<ExtPointer>(offset + header_size + (8 * {{loop.index0}}));

  set_{{field.name}}(bytes.StringAt(offset + {{field.name}}_pointer.offset, {{field.name}}_pointer.length));
{%- elif field.type == Type.CAPABILITY %}
  uint64_t {{field.name}}_ptr = bytes.At<uint64_t>(offset + header_size + (8 * {{loop.index0}}));

  set_{{field.name}}(caps.At({{field.name}}_ptr));
{%- else %}
  // TODO: Unimplemented parsing {{field.type}}
{%- endif %}
{%- endfor %}
}

uint64_t {{message.name}}::SerializeToBytes(glcr::ByteBuffer& bytes, uint64_t offset) const {
  uint32_t next_extension = header_size + 8 * {{ message.fields | length }};
  const uint32_t core_size = next_extension;

{%- for field in message.fields %}
  // Write {{field.name}}.
{%- if field.type == Type.U64 %}
  bytes.WriteAt<uint64_t>(offset + header_size + (8 * {{loop.index0}}), {{field.name}}());
{%- elif field.type == Type.I64 %}
  bytes.WriteAt<int64_t>(offset + header_size + (8 * {{loop.index0}}), {{field.name}}());
{%- elif field.type == Type.STRING %}
  ExtPointer {{field.name}}_ptr{
    .offset = next_extension,
    // FIXME: Check downcast of str length.
    .length = (uint32_t){{field.name}}().length(),
  };

  bytes.WriteStringAt(offset + next_extension, {{field.name}}());
  next_extension += {{field.name}}_ptr.length;

  bytes.WriteAt<ExtPointer>(offset + header_size + (8 * {{loop.index0}}), {{field.name}}_ptr);
{%- elif field.type == Type.CAPABILITY %}
  // FIXME: Implement inbuffer capabilities.
  bytes.WriteAt<uint64_t>(offset + header_size + (8 * {{loop.index0}}), 0);
{%- else %}
  // TODO: Unimplemented serialization {{field.type}}
{%- endif %}
{%- endfor %}

  // The next extension pointer is the length of the message. 
  WriteHeader(bytes, offset, core_size, next_extension);

  return next_extension;
}

uint64_t {{message.name}}::SerializeToBytes(glcr::ByteBuffer& bytes, uint64_t offset, glcr::CapBuffer& caps) const {
  uint32_t next_extension = header_size + 8 * {{ message.fields | length}};
  const uint32_t core_size = next_extension;
  uint64_t next_cap = 0;

{%- for field in message.fields %}
  // Write {{field.name}}.
{%- if field.type == Type.U64 %}
  bytes.WriteAt<uint64_t>(offset + header_size + (8 * {{loop.index0}}), {{field.name}}());
{%- elif field.type == Type.I64 %}
  bytes.WriteAt<int64_t>(offset + header_size + (8 * {{loop.index0}}), {{field.name}}());
{%- elif field.type == Type.STRING %}
  ExtPointer {{field.name}}_ptr{
    .offset = next_extension,
    // FIXME: Check downcast of str length.
    .length = (uint32_t){{field.name}}().length(),
  };

  bytes.WriteStringAt(offset + next_extension, {{field.name}}());
  next_extension += {{field.name}}_ptr.length;

  bytes.WriteAt<ExtPointer>(offset + header_size + (8 * {{loop.index0}}), {{field.name}}_ptr);
{%- elif field.type == Type.CAPABILITY %}
  caps.WriteAt(next_cap, {{field.name}}());
  bytes.WriteAt<uint64_t>(offset + header_size + (8 * {{loop.index0}}), next_cap++);
{%- else %}
  // TODO: Unimplemented serialization {{field.type}}
{%- endif %}
{%- endfor %}

  // The next extension pointer is the length of the message. 
  WriteHeader(bytes, offset, core_size, next_extension);

  return next_extension;
}
{%- endfor %}