# Copyright 2020 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

import("//build_overrides/pigweed.gni")

import("$dir_pw_arduino_build/arduino.gni")
import("$dir_pw_bloat/bloat.gni")
import("$dir_pw_build/facade.gni")
import("$dir_pw_build/module_config.gni")
import("$dir_pw_build/target_types.gni")
import("$dir_pw_docgen/docs.gni")
import("$dir_pw_fuzzer/fuzzer.gni")
import("$dir_pw_protobuf_compiler/proto.gni")
import("$dir_pw_unit_test/test.gni")
import("backend.gni")

declare_args() {
  # The build target that overrides the default configuration options for this
  # module. This should point to a source set that provides defines through a
  # public config (which may -include a file or add defines directly).
  pw_tokenizer_CONFIG = pw_build_DEFAULT_MODULE_CONFIG
}

config("public_include_path") {
  include_dirs = [ "public" ]
  visibility = [ ":*" ]
}

config("linker_script") {
  inputs = [ "pw_tokenizer_linker_sections.ld" ]

  # Automatically add the tokenizer linker sections when cross-compiling or
  # building for Linux. macOS and Windows executables are not supported.
  if (current_os == "" || current_os == "freertos") {
    ldflags = [
      "-T",
      rebase_path("pw_tokenizer_linker_sections.ld", root_build_dir),
    ]
  } else if (current_os == "linux" && !pw_toolchain_OSS_FUZZ_ENABLED) {
    # When building for Linux, the linker provides a default linker script.
    # The add_tokenizer_sections_to_default_script.ld wrapper includes the
    # pw_tokenizer_linker_sections.ld script in a way that appends to the the
    # default linker script instead of overriding it.
    ldflags = [
      "-T",
      rebase_path("add_tokenizer_sections_to_default_script.ld",
                  root_build_dir),
    ]
    lib_dirs = [ "." ]

    inputs += [ "add_tokenizer_sections_to_default_script.ld" ]
  }
  visibility = [ ":*" ]
}

pw_source_set("config") {
  public = [ "public/pw_tokenizer/config.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [ pw_tokenizer_CONFIG ]
}

pw_source_set("pw_tokenizer") {
  public_configs = [ ":public_include_path" ]
  all_dependent_configs = [ ":linker_script" ]
  public_deps = [
    ":config",
    "$dir_pw_containers:to_array",
    dir_pw_polyfill,
    dir_pw_preprocessor,
    dir_pw_span,
  ]
  deps = [ dir_pw_varint ]
  public = [
    "public/pw_tokenizer/encode_args.h",
    "public/pw_tokenizer/hash.h",
    "public/pw_tokenizer/tokenize.h",
  ]
  sources = [
    "encode_args.cc",
    "hash.cc",
    "public/pw_tokenizer/internal/argument_types.h",
    "public/pw_tokenizer/internal/argument_types_macro_4_byte.h",
    "public/pw_tokenizer/internal/argument_types_macro_8_byte.h",
    "public/pw_tokenizer/internal/pw_tokenizer_65599_fixed_length_128_hash_macro.h",
    "public/pw_tokenizer/internal/pw_tokenizer_65599_fixed_length_256_hash_macro.h",
    "public/pw_tokenizer/internal/pw_tokenizer_65599_fixed_length_80_hash_macro.h",
    "public/pw_tokenizer/internal/pw_tokenizer_65599_fixed_length_96_hash_macro.h",
    "public/pw_tokenizer/internal/tokenize_string.h",
    "tokenize.cc",
  ]
  friend = [ ":*" ]
}

# As a temporary workaround, if no backend is set, use an empty test backend so
# that the test can define the handler function.
# TODO(hepler): Switch this to a facade test when available.
if (pw_tokenizer_GLOBAL_HANDLER_BACKEND == "" &&
    pw_tokenizer_GLOBAL_HANDLER_WITH_PAYLOAD_BACKEND == "") {
  # This is an empty library to use as the backend for global_handler and
  # global_handler_with_payload tests.
  pw_source_set("test_backend") {
    visibility = [ ":*" ]
  }

  pw_tokenizer_GLOBAL_HANDLER_BACKEND = ":test_backend"
  pw_tokenizer_GLOBAL_HANDLER_WITH_PAYLOAD_BACKEND = ":test_backend"

  enable_global_handler_test = true
} else {
  enable_global_handler_test = false
}

pw_facade("global_handler") {
  backend = pw_tokenizer_GLOBAL_HANDLER_BACKEND

  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_tokenizer/tokenize_to_global_handler.h" ]
  sources = [ "tokenize_to_global_handler.cc" ]
  public_deps = [ ":pw_tokenizer" ]
}

pw_facade("global_handler_with_payload") {
  backend = pw_tokenizer_GLOBAL_HANDLER_WITH_PAYLOAD_BACKEND

  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_tokenizer/tokenize_to_global_handler_with_payload.h" ]
  sources = [ "tokenize_to_global_handler_with_payload.cc" ]
  public_deps = [ ":pw_tokenizer" ]
}

pw_source_set("base64") {
  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_tokenizer/base64.h" ]
  sources = [ "base64.cc" ]
  public_deps = [
    ":pw_tokenizer",
    "$dir_pw_string:string",
    dir_pw_base64,
    dir_pw_preprocessor,
  ]
}

pw_source_set("decoder") {
  public_configs = [ ":public_include_path" ]
  public_deps = [ dir_pw_span ]
  deps = [
    "$dir_pw_bytes:bit",
    dir_pw_bytes,
    dir_pw_varint,
  ]
  public = [
    "public/pw_tokenizer/detokenize.h",
    "public/pw_tokenizer/token_database.h",
  ]
  sources = [
    "decode.cc",
    "detokenize.cc",
    "public/pw_tokenizer/internal/decode.h",
    "token_database.cc",
  ]
  friend = [ ":*" ]
}

# Executable for generating test data for the C++ and Python detokenizers. This
# target should only be built for the host.
pw_executable("generate_decoding_test_data") {
  deps = [
    ":decoder",
    ":pw_tokenizer",
    dir_pw_varint,
  ]
  sources = [ "generate_decoding_test_data.cc" ]
}

# Executable for generating a test ELF file for elf_reader_test.py. A host
# version of this binary is checked in for use in elf_reader_test.py.
pw_executable("elf_reader_test_binary") {
  deps = [
    ":pw_tokenizer",
    "$dir_pw_varint",
  ]
  sources = [ "py/elf_reader_test_binary.c" ]
  ldflags = [ "-Wl,--unresolved-symbols=ignore-all" ]  # main is not defined
}

pw_test_group("tests") {
  tests = [
    ":argument_types_test",
    ":base64_test",
    ":decode_test",
    ":detokenize_fuzzer",
    ":detokenize_test",
    ":global_handlers_test",
    ":hash_test",
    ":simple_tokenize_test",
    ":token_database_fuzzer",
    ":token_database_test",
    ":tokenize_test",
  ]
  group_deps = [ "$dir_pw_preprocessor:tests" ]
}

pw_test("argument_types_test") {
  sources = [
    "argument_types_test.cc",
    "argument_types_test_c.c",
    "pw_tokenizer_private/argument_types_test.h",
  ]
  deps = [ ":pw_tokenizer" ]

  if (pw_arduino_build_CORE_PATH != "") {
    remove_configs = [ "$dir_pw_build:strict_warnings" ]
  }
}

pw_test("base64_test") {
  sources = [ "base64_test.cc" ]
  deps = [
    ":base64",
    dir_pw_span,
  ]
}

pw_test("decode_test") {
  sources = [
    "decode_test.cc",
    "pw_tokenizer_private/tokenized_string_decoding_test_data.h",
    "pw_tokenizer_private/varint_decoding_test_data.h",
  ]
  deps = [
    ":decoder",
    "$dir_pw_varint",
  ]

  # TODO(tonymd): This fails on Teensyduino 1.54 beta core. It may be related to
  # linking in stl functions. Will debug when 1.54 is released.
  enable_if = pw_build_EXECUTABLE_TARGET_TYPE != "arduino_executable"
}

pw_test("detokenize_test") {
  sources = [ "detokenize_test.cc" ]
  deps = [ ":decoder" ]

  # TODO(tonymd): This fails on Teensyduino 1.54 beta core. It may be related to
  # linking in stl functions. Will debug when 1.54 is released.
  enable_if = pw_build_EXECUTABLE_TARGET_TYPE != "arduino_executable"
}

pw_test("global_handlers_test") {
  sources = [
    "global_handlers_test.cc",
    "global_handlers_test_c.c",
    "pw_tokenizer_private/tokenize_test.h",
  ]
  deps = [
    ":global_handler",
    ":global_handler_with_payload",
  ]

  # TODO(hepler): Switch this to a facade test when available.
  enable_if = enable_global_handler_test
}

pw_test("hash_test") {
  sources = [
    "hash_test.cc",
    "pw_tokenizer_private/generated_hash_test_cases.h",
  ]
  deps = [ ":pw_tokenizer" ]
}

pw_test("simple_tokenize_test") {
  sources = [ "simple_tokenize_test.cc" ]
  deps = [
    ":global_handler",
    ":global_handler_with_payload",
    ":pw_tokenizer",
  ]
}

pw_test("token_database_test") {
  sources = [ "token_database_test.cc" ]
  deps = [ ":decoder" ]
}

pw_test("tokenize_test") {
  sources = [
    "pw_tokenizer_private/tokenize_test.h",
    "tokenize_test.cc",
    "tokenize_test_c.c",
  ]
  deps = [
    ":pw_tokenizer",
    "$dir_pw_varint",
  ]
}

pw_fuzzer("token_database_fuzzer") {
  sources = [ "token_database_fuzzer.cc" ]
  deps = [
    ":decoder",
    "$dir_pw_fuzzer",
    "$dir_pw_preprocessor",
    dir_pw_span,
  ]
}

pw_fuzzer("detokenize_fuzzer") {
  sources = [ "detokenize_fuzzer.cc" ]
  deps = [
    ":decoder",
    "$dir_pw_fuzzer",
    "$dir_pw_preprocessor",
  ]
}

pw_proto_library("proto") {
  sources = [ "options.proto" ]
  prefix = "pw_tokenizer/proto"
  python_package = "py"
}

declare_args() {
  # pw_JAVA_NATIVE_INTERFACE_INCLUDE_DIRS specifies the paths to use for
  # building Java Native Interface libraries. If no paths are provided, targets
  # that require JNI may not build correctly.
  #
  # Example JNI include paths for a Linux system:
  #
  #   pw_JAVA_NATIVE_INTERFACE_INCLUDE_DIRS = [
  #     "/usr/local/buildtools/java/jdk/include/",
  #     "/usr/local/buildtools/java/jdk/include/linux",
  #   ]
  #
  pw_JAVA_NATIVE_INTERFACE_INCLUDE_DIRS = []
}

# Create a shared library for the tokenizer JNI wrapper. The include paths for
# the JNI headers must be available in the system or provided with the
# pw_JAVA_NATIVE_INTERFACE_INCLUDE_DIRS variable.
pw_shared_library("detokenizer_jni") {
  public_configs = [ ":public_include_path" ]
  include_dirs = pw_JAVA_NATIVE_INTERFACE_INCLUDE_DIRS
  sources = [ "java/dev/pigweed/tokenizer/detokenizer.cc" ]
  public_deps = [
    ":decoder",
    "$dir_pw_preprocessor",
  ]
  deps = [ dir_pw_span ]
}

pw_doc_group("docs") {
  sources = [
    "docs.rst",
    "proto.rst",
  ]
  inputs = [ "py/pw_tokenizer/encode.py" ]
  report_deps = [ ":tokenizer_size_report" ]
}

# Pigweed tokenizer size report.
pw_size_diff("tokenizer_size_report") {
  title = "Pigweed tokenizer size report"
  binaries = [
    {
      target = "size_report:tokenize_string"
      base = "size_report:tokenize_string_base"
      label = "tokenize a string"
    },
    {
      target = "size_report:tokenize_string_expr"
      base = "size_report:tokenize_string_expr_base"
      label = "tokenize a string expression"
    },
  ]
}