1 files changed, 86 insertions, 0 deletions
diff --git a/chad/experimental/timespec.c b/chad/experimental/timespec.c
new file mode 100644
index 0000000..dbcca82
--- /dev/null
+++ b/chad/experimental/timespec.c
@@ -0,0 +1,86 @@
+#include <chad/experimental/timespec.h>
+
+/* --- conversion --- */
+
+f64 timespec_to_f64(timespec_t ts)
+{ return (f64) ts.tv_sec + ((f64) ts.tv_nsec / TIMESPEC_HZ); }
+
+f32 timespec_to_f32(timespec_t ts)
+{ return (f32) ts.tv_sec + ((f32) ts.tv_nsec / TIMESPEC_HZ); }
+
+double timespec_to_double(timespec_t ts)
+{ return (double) ts.tv_sec + ((double) ts.tv_nsec / TIMESPEC_HZ); }
+
+float timespec_to_float(timespec_t ts)
+{ return (float) ts.tv_sec + ((float) ts.tv_nsec / TIMESPEC_HZ); }
+
+/* --- from --- */
+
+void f64_from_timespec(timespec_t ts, f64 * r)
+{ *r = (f64) ts.tv_sec + ((f64) ts.tv_nsec / TIMESPEC_HZ); }
+
+void f32_from_timespec(timespec_t ts, f32 * r)
+{ *r = (f32) ts.tv_sec + ((f32) ts.tv_nsec / TIMESPEC_HZ); }
+
+void double_from_timespec(timespec_t ts, double * r)
+{ *r = (double) ts.tv_sec + ((double) ts.tv_nsec / TIMESPEC_HZ); }
+
+void float_from_timespec(timespec_t ts, float * r)
+{ *r = (float) ts.tv_sec + ((float) ts.tv_nsec / TIMESPEC_HZ); }
+
+/* --- math --- */
+
+timespec_t timespec_add(timespec_t a, timespec_t b) {
+  a.tv_sec += b.tv_sec;
+  a.tv_nsec += b.tv_nsec;
+  if (a.tv_nsec >= TIMESPEC_HZ) {
+    a.tv_sec++;
+    a.tv_nsec -= TIMESPEC_HZ;
+  }
+  return a;
+}
+
+timespec_t timespec_sub(timespec_t a, timespec_t b) {
+  a.tv_sec -= b.tv_sec;
+  a.tv_nsec -= b.tv_nsec;
+  if (a.tv_nsec < 0) {
+    a.tv_sec--;
+    a.tv_nsec += TIMESPEC_HZ;
+  }
+  return a;
+}
+
+int timespec_cmp(timespec_t a, timespec_t b) {
+  return a.tv_sec > b.tv_sec ?
+    (1) :
+    a.tv_sec < b.tv_sec ?
+    (-1) :
+    (
+      a.tv_nsec > b.tv_nsec ?
+      (1) :
+      a.tv_nsec < b.tv_nsec ?
+      (-1) : 0
+      );
+}
+
+timespec_t timespec_max(timespec_t a, timespec_t b) {
+  return a.tv_sec > b.tv_sec ?
+    a :
+    a.tv_sec < b.tv_sec ?
+    b :
+    (
+      a.tv_nsec > b.tv_nsec ?
+      a : b
+      );
+}
+
+timespec_t timespec_min(timespec_t a, timespec_t b) {
+  return a.tv_sec < b.tv_sec ?
+    a :
+    a.tv_sec > b.tv_sec ?
+    b :
+    (
+      a.tv_nsec < b.tv_nsec ?
+      a : b
+      );
+}