ImGui text with inline color changes

const char ColorMarkerStart = '{';
const char ColorMarkerEnd = '}';

bool ProcessInlineHexColor( const char* start, const char* end, ImVec4& color )
{
    const int hexCount = ( int )( end - start );
    if( hexCount == 6 || hexCount == 8 )
    {
        char hex[9];
        strncpy( hex, start, hexCount );
        hex[hexCount] = 0;

        unsigned int hexColor = 0;
        if( sscanf( hex, "%x", &hexColor ) > 0 )
        {
            color.x = static_cast< float >( ( hexColor & 0x00FF0000 ) >> 16 ) / 255.0f;
            color.y = static_cast< float >( ( hexColor & 0x0000FF00 ) >> 8  ) / 255.0f;
            color.z = static_cast< float >( ( hexColor & 0x000000FF )       ) / 255.0f;
            color.w = 1.0f;

            if( hexCount == 8 )
            {
                color.w = static_cast< float >( ( hexColor & 0xFF000000 ) >> 24 ) / 255.0f;
            }

            return true;
        }
    }

    return false;
}

void TextWithColors( const char* fmt, ... )
{
    char tempStr[4096];

    va_list argPtr;
    va_start( argPtr, fmt );
    _vsnprintf( tempStr, sizeof( tempStr ), fmt, argPtr );
    va_end( argPtr );
    tempStr[sizeof( tempStr ) - 1] = '\0';

    bool pushedColorStyle = false;
    const char* textStart = tempStr;
    const char* textCur = tempStr;
    while( textCur < ( tempStr + sizeof( tempStr ) ) && *textCur != '\0' )
    {
        if( *textCur == ColorMarkerStart )
        {
            // Print accumulated text
            if( textCur != textStart )
            {
                ImGui::TextUnformatted( textStart, textCur );
                ImGui::SameLine( 0.0f, 0.0f );
            }

            // Process color code
            const char* colorStart = textCur + 1;
            do
            {
                ++textCur;
            }
            while( *textCur != '\0' && *textCur != ColorMarkerEnd );

            // Change color
            if( pushedColorStyle )
            {
                ImGui::PopStyleColor();
                pushedColorStyle = false;
            }

            ImVec4 textColor;
            if( ProcessInlineHexColor( colorStart, textCur, textColor ) )
            {
                ImGui::PushStyleColor( ImGuiCol_Text, textColor );
                pushedColorStyle = true;
            }

            textStart = textCur + 1;
        }
        else if( *textCur == '\n' )
        {
            // Print accumulated text an go to next line
            ImGui::TextUnformatted( textStart, textCur );
            textStart = textCur + 1;
        }

        ++textCur;
    }

    if( textCur != textStart )
    {
        ImGui::TextUnformatted( textStart, textCur );
    }
    else
    {
        ImGui::NewLine();
    }

    if( pushedColorStyle )
    {
        ImGui::PopStyleColor();
    }
}