1 files changed, 45 insertions, 16 deletions
diff --git a/client/main.cpp b/client/main.cpp
index 7a05049..30d7045 100644
--- a/client/main.cpp
+++ b/client/main.cpp
@@ -1,25 +1,54 @@
 #include <cstdio>
-#include <string>
-
-#include "puzbusv1.pb.h"
-
-int main() {
-	GOOGLE_PROTOBUF_VERIFY_VERSION;
-
-	puzbus::I2CMsg test_msg;
+#include <cstdlib>
+#include <cstring>
+#include <unistd.h>
+
+#include "puzbusv1.h"
+
+int send_message() {
+	const char* data = "Test message data!";
+	struct pb_msg output = {
+		.addr = 0x39,
+		.data = (char*) data,
+		.length = strlen(data),
+	};
+
+	char* packed;
+	size_t size;
+	if (!pb_write(&output, &packed, &size)) {
+		printf("error writing!\n");
+		return 1;
+	}
 
-	test_msg.set_address(0x39);
-	test_msg.set_data("Test message data!");
+	fwrite(packed, sizeof(packed[0]), size, stdout);
+	fflush(stdout);
 
-	std::string output;
-	test_msg.SerializeToString(&output);
+	return 0;
+}
 
-	printf("output[%lu]:\n", output.size());
-	for (size_t i = 0; i < output.size(); i++) {
-		printf("%02x ", output[i]);
+int read_message() {
+	freopen(NULL, "rb", stdin); // allow binary on stdin
+	struct pb_msg input;
+	
+	char buf[8]; // extremely small buffer to test chunked message parsing
+	size_t bytes = 0;
+	while ((bytes = fread(buf, sizeof(buf[0]), sizeof(buf), stdin)) > 0) {
+		if (!pb_read(&input, buf, bytes)) continue;
+
+		printf("address: 0x%02x\n", input.addr);
+		printf("data:    \"%.*s\"\n", input.length, input.data);
+		free(input.data);
+		return 0;
 	}
-	printf("\n");
 
+	return 1;
+}
+
+int main() {
+	if (!isatty(fileno(stdout))) return send_message();
+	if (!isatty(fileno(stdin))) return read_message();
+	
+	printf("please pipe some data in or out to use this program\n");
 	return 0;
 }