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

This is useful for testing purposes.

diff --git a/Makefile.am b/Makefile.am
index 4929b2832c5a7b3c36293af50b048f71d0e05bce..707e796aab023152db81dc07466c1ab1affbfcc9 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -77,7 +77,8 @@ libsigrok_la_SOURCES += \
        src/input/raw_analog.c \
        src/input/trace32_ad.c \
        src/input/vcd.c \
-       src/input/wav.c
+       src/input/wav.c \
+       src/input/null.c
 
 # Output modules
 libsigrok_la_SOURCES += \

diff --git a/src/input/input.c b/src/input/input.c
index 3db29ffefdee1669795a5ebd854be4ca6eb36d74..2f2f3db829eb0b938100ab27f6b9765f2a161b15 100644 (file)
--- a/src/input/input.c
+++ b/src/input/input.c
@@ -66,6 +66,7 @@ extern SR_PRIV struct sr_input_module input_trace32_ad;
 extern SR_PRIV struct sr_input_module input_vcd;
 extern SR_PRIV struct sr_input_module input_wav;
 extern SR_PRIV struct sr_input_module input_raw_analog;
+extern SR_PRIV struct sr_input_module input_null;
 /* @endcond */
 
 static const struct sr_input_module *input_module_list[] = {
@@ -76,6 +77,7 @@ static const struct sr_input_module *input_module_list[] = {
        &input_vcd,
        &input_wav,
        &input_raw_analog,
+       &input_null,
        NULL,
 };
 

diff --git a/src/input/null.c b/src/input/null.c
new file mode 100644 (file)
index 0000000..031b553
--- /dev/null
+++ b/src/input/null.c
@@ -0,0 +1,59 @@
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2018 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <libsigrok/libsigrok.h>
+#include "libsigrok-internal.h"
+
+#define LOG_PREFIX "input/null"
+
+static int init(struct sr_input *in, GHashTable *options)
+{
+       (void)in;
+       (void)options;
+
+       return SR_OK;
+}
+
+static int receive(struct sr_input *in, GString *buf)
+{
+       (void)in;
+       (void)buf;
+
+       return SR_OK;
+}
+
+static int end(struct sr_input *in)
+{
+       (void)in;
+
+       return SR_OK;
+}
+
+SR_PRIV struct sr_input_module input_null = {
+       .id = "null",
+       .name = "Null",
+       .desc = "Null input (discards all input)",
+       .exts = NULL,
+       .options = NULL,
+       .init = init,
+       .receive = receive,
+       .end = end,
+       .reset = NULL,
+};