Major refactoring

lib/basic.h

@@ -0,0 +1,61 @@
+#ifndef BASIC_INCLUDED
+#define BASIC_INCLUDED
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct {
+    char data[32];
+} SHA256;
+
+typedef struct {
+    uint32_t data;
+} IPv4;
+
+typedef struct {
+    uint16_t data[8];
+} IPv6;
+
+typedef struct {
+    union {
+        IPv4 ipv4;
+        IPv6 ipv6;
+    };
+    bool is_ipv4;
+    uint16_t port;
+} Address;
+
+typedef struct {
+    char *ptr;
+    int   len;
+} string;
+
+typedef uint64_t Time;
+#define INVALID_TIME ((Time) -1)
+
+#define S(X) ((string) { (X), (int) sizeof(X)-1 })
+
+#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
+
+#define UNREACHABLE __builtin_trap();
+
+bool streq(string s1, string s2);
+
+Time get_current_time(void);
+void nearest_deadline(Time *a, Time b);
+int  deadline_to_timeout(Time deadline, Time current_time);
+
+bool   getargb(int argc, char **argv, char *name);
+string getargs(int argc, char **argv, char *name, char *fallback);
+int    getargi(int argc, char **argv, char *name, int fallback);
+
+void append_hex_as_str(char *out, SHA256 hash);
+
+bool addr_eql(Address a, Address b);
+bool addr_lower(Address a, Address b);
+
+int parse_addr_arg(char *arg, Address *out);
+void addr_sort(Address *addrs, int count);
+
+#endif // BASIC_INCLUDED