C++ CPtr::length方法代码示例

String::CPtr percentDecode(String::CPtr str, String::Encoding enc) {
    if (!str || str->isEmpty())
        return String::create();

    Size len = str->length() + 1;
    char* decoded = new char[len];
    Size size = percentDecode(decoded, len, str->toStdString().c_str());
    String::CPtr res;
    switch (enc) {
    case String::UTF8:
        res = String::create(decoded, enc, size);
        break;
    case String::UTF16:
    case String::UTF16BE:
    case String::UTF16LE:
        res = String::create(decoded, enc, size >> 1);
        break;
    case String::UTF32:
    case String::UTF32BE:
    case String::UTF32LE:
        res = String::create(decoded, enc, size >> 2);
        break;
    default:
        assert(false);
        res = String::null();
    }
    delete[] decoded;
    return res;
}

static inline Size indexOfSep(String::CPtr str, Size from) {
    assert(str);
    Size len = str->length();
    for (Size i = from; i < len; i++) {
        if (isSep(str->charAt(i))) return i;
    }
    return NO_POS;
}

String::CPtr dirname(String::CPtr path) {
    LIBJ_STATIC_SYMBOL_DEF(symCurrent, ".");

    if (!path) return symCurrent;

    path = trimSeps(path);
    String::CPtr base = basename(path);
    Size baseLen = base->length();
    Size pathLen = path->length();
    if (baseLen == pathLen) {
        return symCurrent;
    } else {
        Size sepPos = pathLen - baseLen - 1;
        assert(isSep(path->charAt(sepPos)));
        if (sepPos) {
            return path->substring(0, sepPos);
        } else {
            return path->substring(0, 1);
        }
    }
}

String::CPtr percentEncode(String::CPtr str, String::Encoding enc) {
    static const Boolean isBigEndian = endian() == BIG;

    if (!str || str->length() == 0)
        return String::create();

    Buffer::Ptr buf;
    switch (enc) {
    case String::UTF8:
        buf = Buffer::create(str, Buffer::UTF8);
        break;
    case String::UTF16:
        if (isBigEndian) {
            buf = Buffer::create(str, Buffer::UTF16BE);
        } else {
            buf = Buffer::create(str, Buffer::UTF16LE);
        }
        break;
    case String::UTF16BE:
        buf = Buffer::create(str, Buffer::UTF16BE);
        break;
    case String::UTF16LE:
        buf = Buffer::create(str, Buffer::UTF16LE);
        break;
    case String::UTF32:
        if (isBigEndian) {
            buf = Buffer::create(str, Buffer::UTF32BE);
        } else {
            buf = Buffer::create(str, Buffer::UTF32LE);
        }
        break;
    case String::UTF32BE:
        buf = Buffer::create(str, Buffer::UTF32BE);
        break;
    case String::UTF32LE:
        buf = Buffer::create(str, Buffer::UTF32LE);
        break;
    default:
        assert(false);
        buf = Buffer::null();
    }
    Size sourceLen = buf->length();
    const char* source = static_cast<const char*>(buf->data());
    Size encodedLen = sourceLen * 3 + 1;
    char* encoded = new char[encodedLen];
    percentEncode(encoded, encodedLen, source, sourceLen);
    String::CPtr res = String::create(encoded);
    delete[] encoded;
    return res;
}

static inline String::CPtr trimSeps(String::CPtr str) {
    assert(str);
    Size len = str->length();
    if (!len) return str;

    Size i = len - 1;
    while (1) {
        if (!isSep(str->charAt(i))) {
            return str->substring(0, i + 1);
        }
        if (i) {
            i--;
        } else {
            break;
        }
    }
    return str->substring(0, 1);
}

static inline Size lastIndexOfSep(String::CPtr str, Size from = NO_POS) {
    assert(str);
    Size len = str->length();
    if (!len) return NO_POS;

    if (from >= len) from = len - 1;

    Size i = from;
    while (1) {
        if (isSep(str->charAt(i))) return i;
        if (i) {
            i--;
        } else {
            break;
        }
    }
    return NO_POS;
}

String::CPtr normalize(String::CPtr path) {
    LIBJ_STATIC_SYMBOL_DEF(symCurrent, ".");
    LIBJ_STATIC_SYMBOL_DEF(symParent,  "..");
    LIBJ_STATIC_SYMBOL_DEF(symNull,    "null");

    if (!path) return symNull;

    Boolean absolute = false;
    Boolean endsWithSep = false;
    typedef TypedJsArray<String::CPtr> StringArray;
    StringArray::Ptr dirs = StringArray::create();
    Size len = path->length();
    for (Size i = 0; i < len;) {
        Size idx = indexOfSep(path, i);
        if (idx == 0) {
            absolute = true;
        } else if (idx != i) {
            String::CPtr dir;
            if (idx == NO_POS) {
                dir = path->substring(i);
            } else {
                dir = path->substring(i, idx);
            }
            if (dir->equals(symParent)) {
                Size numDirs = dirs->size();
                if (numDirs > 0 &&
                    !dirs->getTyped(numDirs - 1)->equals(symParent)) {
                    dirs->removeTyped(numDirs - 1);
                } else {
                    dirs->addTyped(dir);
                }
            } else if (!dir->equals(symCurrent)) {
                dirs->addTyped(dir);
            }
        }

        if (idx == NO_POS) {
            endsWithSep = false;
            i = len;
        } else {
            endsWithSep = true;
            i = idx + 1;
        }
    }

    StringBuilder::Ptr normal = StringBuilder::create();
    if (absolute)
        normal->appendChar(SEP);
    Size numDirs = dirs->size();
    for (Size i = 0; i < numDirs; i++) {
        if (i) normal->appendChar(SEP);
        normal->appendStr(dirs->getTyped(i));
    }
    if (numDirs > 0 && endsWithSep)
        normal->appendChar(SEP);
    if (normal->length() == 0) {
        return symCurrent;
    } else {
        return normal->toString();
    }
}