output/null: Add a null module that discards all data.

[libsigrok.git] / src / output / output.c

diff --git a/src/output/output.c b/src/output/output.c
index 04f3054cf1deafeb7674e2fda07adc5c7a926fbb..c6c2d7206cbb2fce828177546659a13284127258 100644 (file)
--- a/src/output/output.c
+++ b/src/output/output.c
@@ -17,8 +17,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <config.h>
 #include <string.h>
-#include "libsigrok.h"
+#include <libsigrok/libsigrok.h>
 #include "libsigrok-internal.h"
 
 /** @cond PRIVATE */
@@ -37,7 +38,7 @@
  * Output module handling.
  *
  * libsigrok supports several output modules for file formats such as binary,
- * VCD, gnuplot, and so on. It provides an output API that frontends can use.
+ * VCD, csv, and so on. It provides an output API that frontends can use.
  * New output modules can be added/implemented in libsigrok without having
  * to change the frontends at all.
  *
@@ -58,12 +59,12 @@ extern SR_PRIV struct sr_output_module output_ascii;
 extern SR_PRIV struct sr_output_module output_binary;
 extern SR_PRIV struct sr_output_module output_vcd;
 extern SR_PRIV struct sr_output_module output_ols;
-extern SR_PRIV struct sr_output_module output_gnuplot;
 extern SR_PRIV struct sr_output_module output_chronovu_la8;
 extern SR_PRIV struct sr_output_module output_csv;
 extern SR_PRIV struct sr_output_module output_analog;
 extern SR_PRIV struct sr_output_module output_srzip;
 extern SR_PRIV struct sr_output_module output_wav;
+extern SR_PRIV struct sr_output_module output_null;
 /* @endcond */
 
 static const struct sr_output_module *output_module_list[] = {
@@ -71,7 +72,6 @@ static const struct sr_output_module *output_module_list[] = {
        &output_binary,
        &output_bits,
        &output_csv,
-       &output_gnuplot,
        &output_hex,
        &output_ols,
        &output_vcd,
@@ -79,6 +79,7 @@ static const struct sr_output_module *output_module_list[] = {
        &output_analog,
        &output_srzip,
        &output_wav,
+       &output_null,
        NULL,
 };
 
@@ -156,6 +157,18 @@ SR_API const char *const *sr_output_extensions_get(
        return omod->exts;
 }
 
+/*
+ * Checks whether a given flag is set.
+ *
+ * @see sr_output_flag
+ * @since 0.4.0
+ */
+SR_API gboolean sr_output_test_flag(const struct sr_output_module *omod,
+               uint64_t flag)
+{
+       return (flag & omod->flags);
+}
+
 /**
  * Return the output module with the specified ID, or NULL if no module
  * with that id is found.
@@ -271,7 +284,8 @@ SR_API const struct sr_output *sr_output_new(const struct sr_output_module *omod
                                /* Pass option along. */
                                gvt = g_variant_get_type(mod_opts[i].def);
                                if (!g_variant_is_of_type(value, gvt)) {
-                                       sr_err("Invalid type for '%s' option.", key);
+                                       sr_err("Invalid type for '%s' option.",
+                                               (char *)key);
                                        g_free(op);
                                        return NULL;
                                }
@@ -289,7 +303,8 @@ SR_API const struct sr_output *sr_output_new(const struct sr_output_module *omod
                        g_hash_table_iter_init(&iter, options);
                        while (g_hash_table_iter_next(&iter, &key, &value)) {
                                if (!g_hash_table_lookup(new_opts, key)) {
-                                       sr_err("Output module '%s' has no option '%s'", omod->id, key);
+                                       sr_err("Output module '%s' has no option '%s'",
+                                               omod->id, (char *)key);
                                        g_hash_table_destroy(new_opts);
                                        g_free(op);
                                        return NULL;