diff options
Diffstat (limited to 'src/libs/sig/ops_sub.c')
-rw-r--r-- | src/libs/sig/ops_sub.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/libs/sig/ops_sub.c b/src/libs/sig/ops_sub.c new file mode 100644 index 0000000..15fed1b --- /dev/null +++ b/src/libs/sig/ops_sub.c @@ -0,0 +1,54 @@ +#include <assert.h> + +#include "sig.h" + + +typedef struct ops_sub_ctxt_t { + sig_t *a, *b; +} ops_sub_ctxt_t; + + +static size_t ops_sub_size(va_list ap) +{ + return sizeof(ops_sub_ctxt_t); +} + + +static void ops_sub_init(void *context, va_list ap) +{ + ops_sub_ctxt_t *ctxt = context; + + assert(ctxt); + + ctxt->a = va_arg(ap, sig_t *); + ctxt->b = va_arg(ap, sig_t *); +} + + +static void ops_sub_destroy(void *context) +{ + ops_sub_ctxt_t *ctxt = context; + + assert(ctxt); + + sig_free(ctxt->a); + sig_free(ctxt->b); +} + + +static float ops_sub_output(void *context, unsigned ticks_ms) +{ + ops_sub_ctxt_t *ctxt = context; + + assert(ctxt); + + return sig_output(ctxt->a, ticks_ms) - sig_output(ctxt->b, ticks_ms); +} + + +sig_ops_t sig_ops_sub = { + .size = ops_sub_size, + .init = ops_sub_init, + .destroy = ops_sub_destroy, + .output = ops_sub_output, +}; |