// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "flutter/shell/platform/linux/testing/fl_test.h"

static uint8_t hex_digit_to_int(char value) {
  if (value >= '0' && value <= '9')
    return value - '0';
  else if (value >= 'a' && value <= 'f')
    return value - 'a' + 10;
  else if (value >= 'F' && value <= 'F')
    return value - 'A' + 10;
  else
    return 0;
}

static uint8_t parse_hex8(const gchar* hex_string) {
  if (hex_string[0] == '\0')
    return 0x00;
  return hex_digit_to_int(hex_string[0]) << 4 | hex_digit_to_int(hex_string[1]);
}

GBytes* hex_string_to_bytes(const gchar* hex_string) {
  GByteArray* buffer = g_byte_array_new();
  for (int i = 0; hex_string[i] != '\0' && hex_string[i + 1] != '\0'; i += 2) {
    uint8_t value = parse_hex8(hex_string + i);
    g_byte_array_append(buffer, &value, 1);
  }
  return g_byte_array_free_to_bytes(buffer);
}

gchar* bytes_to_hex_string(GBytes* bytes) {
  GString* hex_string = g_string_new("");
  size_t data_length;
  const uint8_t* data =
      static_cast<const uint8_t*>(g_bytes_get_data(bytes, &data_length));
  for (size_t i = 0; i < data_length; i++)
    g_string_append_printf(hex_string, "%02x", data[i]);
  return g_string_free(hex_string, FALSE);
}