bool ResTable_config::match()

in libresource/ResourceTypes.cpp [2444:2580]
120 lines of code
61 McCabe index (conditional complexity)

bool ResTable_config::match(const ResTable_config& settings) const {
    if (imsi != 0) {
        if (mcc != 0 && mcc != settings.mcc) {
            return false;
        }
        if (mnc != 0 && mnc != settings.mnc) {
            return false;
        }
    }
    if (locale != 0) {
        // Don't consider the script & variants when deciding matches.
        //
        // If we two configs differ only in their script or language, they
        // can be weeded out in the isMoreSpecificThan test.
        if (language[0] != 0
            && (language[0] != settings.language[0]
                || language[1] != settings.language[1])) {
            return false;
        }

        if (country[0] != 0
            && (country[0] != settings.country[0]
                || country[1] != settings.country[1])) {
            return false;
        }
    }

    if (screenConfig != 0) {
        const int layoutDir = screenLayout&MASK_LAYOUTDIR;
        const int setLayoutDir = settings.screenLayout&MASK_LAYOUTDIR;
        if (layoutDir != 0 && layoutDir != setLayoutDir) {
            return false;
        }

        const int screenSize = screenLayout&MASK_SCREENSIZE;
        const int setScreenSize = settings.screenLayout&MASK_SCREENSIZE;
        // Any screen sizes for larger screens than the setting do not
        // match.
        if (screenSize != 0 && screenSize > setScreenSize) {
            return false;
        }

        const int screenLong = screenLayout&MASK_SCREENLONG;
        const int setScreenLong = settings.screenLayout&MASK_SCREENLONG;
        if (screenLong != 0 && screenLong != setScreenLong) {
            return false;
        }

        const int uiModeType = uiMode&MASK_UI_MODE_TYPE;
        const int setUiModeType = settings.uiMode&MASK_UI_MODE_TYPE;
        if (uiModeType != 0 && uiModeType != setUiModeType) {
            return false;
        }

        const int uiModeNight = uiMode&MASK_UI_MODE_NIGHT;
        const int setUiModeNight = settings.uiMode&MASK_UI_MODE_NIGHT;
        if (uiModeNight != 0 && uiModeNight != setUiModeNight) {
            return false;
        }

        if (smallestScreenWidthDp != 0
                && smallestScreenWidthDp > settings.smallestScreenWidthDp) {
            return false;
        }
    }
    if (screenSizeDp != 0) {
        if (screenWidthDp != 0 && screenWidthDp > settings.screenWidthDp) {
            if (kDebugTableSuperNoisy) {
                ALOGI("Filtering out width %d in requested %d", screenWidthDp,
                        settings.screenWidthDp);
            }
            return false;
        }
        if (screenHeightDp != 0 && screenHeightDp > settings.screenHeightDp) {
            if (kDebugTableSuperNoisy) {
                ALOGI("Filtering out height %d in requested %d", screenHeightDp,
                        settings.screenHeightDp);
            }
            return false;
        }
    }
    if (screenType != 0) {
        if (orientation != 0 && orientation != settings.orientation) {
            return false;
        }
        // density always matches - we can scale it.  See isBetterThan
        if (touchscreen != 0 && touchscreen != settings.touchscreen) {
            return false;
        }
    }
    if (input != 0) {
        const int keysHidden = inputFlags&MASK_KEYSHIDDEN;
        const int setKeysHidden = settings.inputFlags&MASK_KEYSHIDDEN;
        if (keysHidden != 0 && keysHidden != setKeysHidden) {
            // For compatibility, we count a request for KEYSHIDDEN_NO as also
            // matching the more recent KEYSHIDDEN_SOFT.  Basically
            // KEYSHIDDEN_NO means there is some kind of keyboard available.
            if (kDebugTableSuperNoisy) {
                ALOGI("Matching keysHidden: have=%d, config=%d\n", keysHidden, setKeysHidden);
            }
            if (keysHidden != KEYSHIDDEN_NO || setKeysHidden != KEYSHIDDEN_SOFT) {
                if (kDebugTableSuperNoisy) {
                    ALOGI("No match!");
                }
                return false;
            }
        }
        const int navHidden = inputFlags&MASK_NAVHIDDEN;
        const int setNavHidden = settings.inputFlags&MASK_NAVHIDDEN;
        if (navHidden != 0 && navHidden != setNavHidden) {
            return false;
        }
        if (keyboard != 0 && keyboard != settings.keyboard) {
            return false;
        }
        if (navigation != 0 && navigation != settings.navigation) {
            return false;
        }
    }
    if (screenSize != 0) {
        if (screenWidth != 0 && screenWidth > settings.screenWidth) {
            return false;
        }
        if (screenHeight != 0 && screenHeight > settings.screenHeight) {
            return false;
        }
    }
    if (version != 0) {
        if (sdkVersion != 0 && sdkVersion > settings.sdkVersion) {
            return false;
        }
        if (minorVersion != 0 && minorVersion != settings.minorVersion) {
            return false;
        }
    }
    return true;
}