org.robolectric.res.android.ResourceUtils Maven / Gradle / Ivy

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package org.robolectric.res.android;

// transliterated from
// https://android.googlesource.com/platform/frameworks/base/+/android-9.0.0_r12/libs/androidfw/include/androidfw/ResourceUtils.h
// and
// https://android.googlesource.com/platform/frameworks/base/+/android-9.0.0_r12/libs/androidfw/ResourceUtils.cpp
class ResourceUtils {
  // Extracts the package, type, and name from a string of the format: [[package:]type/]name
  // Validation must be performed on each extracted piece.
  // Returns false if there was a syntax error.
  //  boolean ExtractResourceName(String& str, String* out_package, String* out_type,
  //                           String* out_entry);

  static int fix_package_id(int resid, int package_id) {
    return (resid & 0x00ffffff) | (package_id << 24);
  }

  static int get_package_id(int resid) {
    //    return static_cast((resid >> 24) & 0x000000ff);
    return resid >>> 24;
  }

  // The type ID is 1-based, so if the returned value is 0 it is invalid.
  static int get_type_id(int resid) {
    //    return static_cast((resid >> 16) & 0x000000ff);
    return (resid & 0x00FF0000) >>> 16;
  }

  static int get_entry_id(int resid) {
    //    return static_cast(resid & 0x0000ffff);
    return (short) (resid & 0x0000FFFF);
  }

  static boolean is_internal_resid(int resid) {
    return (resid & 0xffff0000) != 0 && (resid & 0x00ff0000) == 0;
  }

  static boolean is_valid_resid(int resid) {
    return (resid & 0x00ff0000) != 0 && (resid & 0xff000000) != 0;
  }

  static int make_resid(byte package_id, byte type_id, short entry_id) {
    //    return (static_cast(package_id) << 24) | (static_cast(type_id) << 16) |
    //        entry_id;
    return package_id << 24 | type_id << 16 | entry_id;
  }

  //   bool ExtractResourceName(const StringPiece& str, StringPiece* out_package, StringPiece*
  // out_type,
  //                          StringPiece* out_entry) {
  //   *out_package = "";
  //   *out_type = "";
  //   bool has_package_separator = false;
  //   bool has_type_separator = false;
  //   const char* start = str.data();
  //   const char* end = start + str.size();
  //   const char* current = start;
  //   while (current != end) {
  //     if (out_type->size() == 0 && *current == '/') {
  //       has_type_separator = true;
  //       out_type->assign(start, current - start);
  //       start = current + 1;
  //     } else if (out_package->size() == 0 && *current == ':') {
  //       has_package_separator = true;
  //       out_package->assign(start, current - start);
  //       start = current + 1;
  //     }
  //     current++;
  //   }
  //   out_entry->assign(start, end - start);
  //
  //   return !(has_package_separator && out_package->empty()) &&
  //          !(has_type_separator && out_type->empty());
  // }

  static boolean ExtractResourceName(
      String str, Ref out_package, Ref out_type, final Ref out_entry) {
    out_package.set("");
    out_type.set("");
    boolean has_package_separator = false;
    boolean has_type_separator = false;
    int start = 0;
    int end = start + str.length();
    int current = start;
    while (current != end) {
      if (out_type.get().length() == 0 && str.charAt(current) == '/') {
        has_type_separator = true;
        out_type.set(str.substring(start, current));
        start = current + 1;
      } else if (out_package.get().length() == 0 && str.charAt(current) == ':') {
        has_package_separator = true;
        out_package.set(str.substring(start, current));
        start = current + 1;
      }
      current++;
    }
    out_entry.set(str.substring(start, end));

    return !(has_package_separator && out_package.get().isEmpty())
        && !(has_type_separator && out_type.get().isEmpty());
  }
}