From 5efd704aad4fd706286a274c469a3b9681d490c3 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Sat, 27 Apr 2024 11:43:26 +1000
Subject: [PATCH] test: added parse_tlog

for performance testing
---
 generator/C/test/posix/Makefile     |  3 ++
 generator/C/test/posix/parse_tlog.c | 59 +++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 generator/C/test/posix/parse_tlog.c

diff --git a/generator/C/test/posix/Makefile b/generator/C/test/posix/Makefile
index f1b993fcd..12794da0d 100644
--- a/generator/C/test/posix/Makefile
+++ b/generator/C/test/posix/Makefile
@@ -50,3 +50,6 @@ testmav2.0_minimal: testmav.c
 
 sha256_test: sha256_test.c
 	$(CC) $(CFLAGS) -I../../include_v2.0 -o $@ sha256_test.c
+
+parse_tlog: parse_tlog.c
+	$(CC) $(CFLAGS) -I../../include_v2.0 -I../../include_v2.0/minimal -o $@ parse_tlog.c
diff --git a/generator/C/test/posix/parse_tlog.c b/generator/C/test/posix/parse_tlog.c
new file mode 100644
index 000000000..160a4f367
--- /dev/null
+++ b/generator/C/test/posix/parse_tlog.c
@@ -0,0 +1,59 @@
+/*
+  parse a tlog, for performance testing
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <assert.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define MAVLINK_USE_CONVENIENCE_FUNCTIONS
+#define MAVLINK_USE_MESSAGE_INFO
+#define MAVLINK_COMM_NUM_BUFFERS 2
+
+// this trick allows us to make mavlink_message_t as small as possible
+// for this dialect, which saves some memory
+#include <version.h>
+#define MAVLINK_MAX_PAYLOAD_LEN MAVLINK_MAX_DIALECT_PAYLOAD_SIZE
+
+#include <mavlink_types.h>
+static mavlink_system_t mavlink_system = {42,11,};
+
+#define MAVLINK_ASSERT(x) assert(x)
+static void comm_send_ch(mavlink_channel_t chan, uint8_t c) {}
+
+#include <mavlink.h>
+
+int main(int argc, const char *argv[])
+{
+    if (argc < 2) {
+	printf("Usage: parse_tlog FILENAME\n");
+	exit(1);
+    }
+    const char *filename = argv[1];
+    int fd = open(filename, O_RDONLY);
+    if (fd == -1) {
+	perror(filename);
+	exit(1);
+    }
+    mavlink_channel_t chan = MAVLINK_COMM_0;
+    char c;
+    uint32_t msg_count = 0;
+    mavlink_message_t last_msg;
+    mavlink_status_t status;
+
+    while (read(fd, &c, 1) == 1) {
+	if (mavlink_parse_char(chan, c, &last_msg, &status)) {
+	    msg_count++;
+	}
+    }
+    printf("parsed %u messages\n", (unsigned)msg_count);
+
+    return 0;
+}
+