Function ReadString

code/AssetLib/SIB/SIBImporter.cpp:174–197

Reads a UTF-16LE string and returns it at UTF-8.

// Reads a UTF-16LE string and returns it at UTF-8.
static aiString ReadString(StreamReaderLE *stream, uint32_t numWChars) {
    if (nullptr == stream || 0 == numWChars) {
        return aiString();
    }

    // Allocate buffers (max expansion is 1 byte -> 4 bytes for UTF-8)
    std::vector<unsigned char> str;
    str.reserve(numWChars * 4 + 1);
    uint16_t *temp = new uint16_t[numWChars];
    for (uint32_t n = 0; n < numWChars; ++n) {
        temp[n] = stream->GetU2();
    }

    // Convert it and NUL-terminate.
    const uint16_t *start(temp), *end(temp + numWChars);
    utf8::utf16to8(start, end, back_inserter(str));
    str[str.size() - 1] = '\0';

    // Return the final string.
    aiString result = aiString((const char *)&str[0]);
    delete[] temp;

    return result;
}

// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.