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/* Implementing buffer protocol typemaps */
/* %pybuffer_mutable_binary(TYPEMAP, SIZE)
*
* Macro for functions accept mutable buffer pointer with a size.
* This can be used for both input and output. For example:
*
* %pybuffer_mutable_binary(char *buff, int size);
* void foo(char *buff, int size) {
* for(int i=0; i<size; ++i)
* buff[i]++;
* }
*/
%define %pybuffer_mutable_binary(TYPEMAP, SIZE)
%typemap(in) (TYPEMAP, SIZE) {
int res; Py_ssize_t size = 0; void *buf = 0;
Py_buffer view;
res = PyObject_GetBuffer($input, &view, PyBUF_WRITABLE);
size = view.len;
buf = view.buf;
PyBuffer_Release(&view);
if (res < 0) {
PyErr_Clear();
%argument_fail(res, "(TYPEMAP, SIZE)", $symname, $argnum);
}
$1 = ($1_ltype) buf;
$2 = ($2_ltype) (size/sizeof($*1_type));
}
%enddef
/* %pybuffer_mutable_string(TYPEMAP)
*
* Macro for functions accept mutable zero terminated string pointer.
* This can be used for both input and output. For example:
*
* %pybuffer_mutable_string(char *str);
* void foo(char *str) {
* while(*str) {
* *str = toupper(*str);
* str++;
* }
*/
%define %pybuffer_mutable_string(TYPEMAP)
%typemap(in) (TYPEMAP) {
int res; void *buf = 0;
Py_buffer view;
res = PyObject_GetBuffer($input, &view, PyBUF_WRITABLE);
buf = view.buf;
PyBuffer_Release(&view);
if (res < 0) {
PyErr_Clear();
%argument_fail(res, "(TYPEMAP)", $symname, $argnum);
}
$1 = ($1_ltype) buf;
}
%enddef
/* pybuffer_binary(TYPEMAP, SIZE)
*
* Macro for functions accept read only buffer pointer with a size.
* This must be used for input. For example:
*
* %pybuffer_binary(char *buff, int size);
* int foo(char *buff, int size) {
* int count = 0;
* for(int i=0; i<size; ++i)
* if (0==buff[i]) count++;
* return count;
* }
*/
%define %pybuffer_binary(TYPEMAP, SIZE)
%typemap(in) (TYPEMAP, SIZE) {
int res; Py_ssize_t size = 0; const void *buf = 0;
Py_buffer view;
res = PyObject_GetBuffer($input, &view, PyBUF_CONTIG_RO);
size = view.len;
buf = view.buf;
PyBuffer_Release(&view);
if (res < 0) {
PyErr_Clear();
%argument_fail(res, "(TYPEMAP, SIZE)", $symname, $argnum);
}
$1 = ($1_ltype) buf;
$2 = ($2_ltype) (size / sizeof($*1_type));
}
%enddef
/* %pybuffer_string(TYPEMAP)
*
* Macro for functions accept read only zero terminated string pointer.
* This can be used for input. For example:
*
* %pybuffer_string(char *str);
* int foo(char *str) {
* int count = 0;
* while(*str) {
* if (isalnum(*str))
* count++;
* str++;
* }
*/
%define %pybuffer_string(TYPEMAP)
%typemap(in) (TYPEMAP) {
int res; const void *buf = 0;
Py_buffer view;
res = PyObject_GetBuffer($input, &view, PyBUF_CONTIG_RO);
buf = view.buf;
PyBuffer_Release(&view);
if (res < 0) {
%argument_fail(res, "(TYPEMAP)", $symname, $argnum);
}
$1 = ($1_ltype) buf;
}
%enddef