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-rw-r--r--src/libs/sig/ops_inv.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/src/libs/sig/ops_inv.c b/src/libs/sig/ops_inv.c
new file mode 100644
index 0000000..abb1102
--- /dev/null
+++ b/src/libs/sig/ops_inv.c
@@ -0,0 +1,52 @@
+#include <assert.h>
+
+#include "sig.h"
+
+
+typedef struct ops_inv_ctxt_t {
+ sig_t *x;
+} ops_inv_ctxt_t;
+
+
+static size_t ops_inv_size(va_list ap)
+{
+ return sizeof(ops_inv_ctxt_t);
+}
+
+
+static void ops_inv_init(void *context, va_list ap)
+{
+ ops_inv_ctxt_t *ctxt = context;
+
+ assert(ctxt);
+
+ ctxt->x = va_arg(ap, sig_t *);
+}
+
+
+static void ops_inv_destroy(void *context)
+{
+ ops_inv_ctxt_t *ctxt = context;
+
+ assert(ctxt);
+
+ sig_free(ctxt->x);
+}
+
+
+static float ops_inv_output(void *context, unsigned ticks_ms)
+{
+ ops_inv_ctxt_t *ctxt = context;
+
+ assert(ctxt);
+
+ return -sig_output(ctxt->x, ticks_ms);
+}
+
+
+sig_ops_t sig_ops_inv = {
+ .size = ops_inv_size,
+ .init = ops_inv_init,
+ .destroy = ops_inv_destroy,
+ .output = ops_inv_output,
+};
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