1 files changed, 52 insertions, 0 deletions
diff --git a/common.h b/common.h
new file mode 100644
index 0000000..60d8984
--- /dev/null
+++ b/common.h
@@ -0,0 +1,52 @@
+#ifndef COMMON_H
+#define COMMON_H
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <wchar.h>
+
+#define AUTHOR_LEN 13
+#define TIMESTAMP_LEN 9
+// port to listen on
+#define PORT 9983
+// buffer size for holding data received from recv()
+// TODO: choose a good size
+#define STREAM_BUF 1024
+// max data received in one recv() call on serverfd
+// TODO: choose a good size
+#define STREAM_LIMIT 1024
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+typedef int64_t s64;
+
+struct Message {
+    u8 author[AUTHOR_LEN];
+    u8 timestamp[TIMESTAMP_LEN];
+    // includes null terminator
+    u16 text_len;
+    wchar_t *text;
+} typedef Message;
+
+#define MESSAGELEN(m) (AUTHOR_LEN + TIMESTAMP_LEN + sizeof(m.text_len)*sizeof(wchar_t) + m.text_len)
+#define MESSAGELENP(m) (AUTHOR_LEN + TIMESTAMP_LEN + sizeof(m->text_len) + m->text_len*(sizeof(wchar_t)))
+
+void message_timestamp(u8 str[TIMESTAMP_LEN])
+{
+    time_t now;
+    struct tm *ltime;
+    time(&now);
+    ltime = localtime(&now);
+    strftime((char *)str, TIMESTAMP_LEN, "%H:%M:%S", ltime);
+}
+
+#endif