Split project over multiple files

src/basic.c

@@ -0,0 +1,60 @@
+#ifdef _WIN32
+#else
+#include <time.h>
+#endif
+
+#include "basic.h"
+
+bool streq(string s1, string s2)
+{
+    if (s1.len != s2.len)
+        return false;
+    for (int i = 0; i < s1.len; i++)
+        if (s1.ptr[i] != s2.ptr[i])
+            return false;
+    return true;
+}
+
+// Returns the current time in milliseconds since
+// an unspecified time in the past (useful to calculate
+// elapsed time intervals)
+Time get_current_time(void)
+{
+#ifdef _WIN32
+    {
+        int64_t count;
+        int64_t freq;
+        int ok;
+
+        ok = QueryPerformanceCounter((LARGE_INTEGER*) &count);
+        if (!ok) return INVALID_TIME;
+
+        ok = QueryPerformanceFrequency((LARGE_INTEGER*) &freq);
+        if (!ok) return INVALID_TIME;
+
+        uint64_t res = 1000 * (double) count / freq;
+        return res;
+    }
+#else
+    {
+        struct timespec time;
+
+        if (clock_gettime(CLOCK_REALTIME, &time))
+            return INVALID_TIME;
+
+        uint64_t res;
+
+        uint64_t sec = time.tv_sec;
+        if (sec > UINT64_MAX / 1000000000)
+            return INVALID_TIME;
+        res = sec * 1000;
+
+        uint64_t nsec = time.tv_nsec;
+        if (res > UINT64_MAX - nsec)
+            return INVALID_TIME;
+        res += nsec / 1000000;
+
+        return res;
+    }
+#endif
+}