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mraajs.i: add i2c read/write function typemaps

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2015-01-06 11:11:00 +00:00
parent 23fca714e1
commit f14654a120
1 changed files with 40 additions and 0 deletions
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40
src/javascript/mraajs.i
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@@ -2,4 +2,44 @@
%feature("autodoc", "3");
%array_class(uint8_t, uint8Array);
%inline %{
#include <node_buffer.h>
%}
// i2c write()
%typemap(in) (const uint8_t *data, int length) {
$1 = (uint8_t*) node::Buffer::Data($input);
$2 = node::Buffer::Length($input);
}
%newobject I2c::read(uint8_t *data, int length);
%typemap(in) (uint8_t *data, int length) {
int x;
int ecode = SWIG_AsVal_int($input, &x);
if (!SWIG_IsOK(ecode)) {
SWIG_exception_fail(SWIG_ArgError(ecode), "Expected an int");
}
$2 = x;
if ($2 < 0) {
SWIG_exception_fail(SWIG_ERROR, "Positive integer expected");
SWIGV8_RETURN(v8::Undefined());
}
$1 = (uint8_t*) malloc($2 * sizeof(uint8_t));
}
%typemap(argout) (uint8_t *data, int length) {
if (result < 0) { /* Check for I/O error */
free($1);
SWIG_exception_fail(SWIG_ERROR, "I2c write failed");
SWIGV8_RETURN(v8::Undefined());
}
// Append output value $1 to $result
// return the v8::handle of the node_buffer
$result = node::Buffer::New((char*) $1, result)->handle_;
free($1);
}
%include ../mraa.i