From 0fa146ab7f5246050be8d9b983cdec2cbafb766b Mon Sep 17 00:00:00 2001 From: Richard Knight Date: Tue, 24 Aug 2021 22:50:36 +0100 Subject: initial --- include/handling.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 include/handling.h (limited to 'include') diff --git a/include/handling.h b/include/handling.h new file mode 100644 index 0000000..706ffb1 --- /dev/null +++ b/include/handling.h @@ -0,0 +1,54 @@ +/* + handling.h + Copyright (C) 2021 Richard Knight + + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + + */ +#include + +const char* handleIdentifier = "::hnd%d"; + + +/* + * Obtain global object of typename from global variables by handle + */ +template +T* getHandle(csnd::Csound* csound, MYFLT handle) { + char buffer[32]; + snprintf(buffer, 32, handleIdentifier, (int)handle); + return (T*) csound->query_global_variable(buffer); +} + + +/* + * Create global object of typename in global variables, returning handle + */ +template +MYFLT createHandle(csnd::Csound* csound, T** data) { + char buffer[32]; + int handle = 0; + snprintf(buffer, 32, handleIdentifier, handle); + while ((*data = (T*) csound->query_global_variable(buffer)) != NULL) { + snprintf(buffer, 32, handleIdentifier, ++handle); + } + csound->create_global_variable(buffer, sizeof(T)); + *data = (T*) csound->query_global_variable(buffer); + + return FL(handle); +} + + -- cgit v1.2.3