From 952af7e7f9a0cc7fd511ae84440a99b6add3ec9f Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Tue, 10 May 2022 18:25:11 +0100
Subject: [PATCH] Added time() and clock()

---
 CMakeLists.txt                      |  2 +-
 photon/libc/include/time.h          | 24 ++++++++++++++++++++++++
 photon/libc/sys/horizon/__time.h    |  9 +++++++++
 photon/libc/sys/horizon/sys/_time.h |  6 ++++++
 photon/libc/sys/horizon/time.c      | 19 +++++++++++++++++++
 photon/libc/time/clock.c            |  7 +++++++
 photon/libc/time/gmtime.c           |  0
 photon/libc/time/localtime.c        |  0
 photon/libc/time/mktime.c           |  0
 photon/libc/time/strftime.c         |  0
 photon/libc/time/time.c             | 12 ++++++++++++
 11 files changed, 78 insertions(+), 1 deletion(-)
 create mode 100644 photon/libc/sys/horizon/__time.h
 create mode 100644 photon/libc/sys/horizon/sys/_time.h
 create mode 100644 photon/libc/sys/horizon/time.c
 create mode 100644 photon/libc/time/clock.c
 create mode 100644 photon/libc/time/gmtime.c
 create mode 100644 photon/libc/time/localtime.c
 create mode 100644 photon/libc/time/mktime.c
 create mode 100644 photon/libc/time/strftime.c
 create mode 100644 photon/libc/time/time.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f639a5..6eacaaa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,7 @@ set(CMAKE_EXE_LINKER_FLAGS
 
 set(malloc_impl dlmalloc)
 set(photon_libc_sources "")
-set(generic_dirs string stdio stdlib errno internal ctype wchar)
+set(generic_dirs string stdio stdlib errno internal ctype wchar time)
 
 message(STATUS "Memory allocator: ${malloc_impl}")
 
diff --git a/photon/libc/include/time.h b/photon/libc/include/time.h
index c0aa0b3..69241f4 100644
--- a/photon/libc/include/time.h
+++ b/photon/libc/include/time.h
@@ -1,11 +1,35 @@
 #ifndef TIME_H_
 #define TIME_H_
 
+#include <stddef.h>
 #include <sys/types.h>
+#include <sys/_time.h>
+
+#define CLOCKS_PER_SEC __SYS_CLOCKS_PER_SEC
 
 struct timespec {
     time_t tv_sec;
     long tv_nsec;
 };
 
+struct tm {
+    int tm_sec;
+    int tm_min;
+    int tm_hour;
+    int tm_mday;
+    int tm_mon;
+    int tm_year;
+    int tm_wday;
+    int tm_yday;
+    int tm_isdst;
+};
+
+extern clock_t clock(void);
+extern time_t time(time_t *p);
+
+extern struct tm *gmtime(const time_t *timer);
+extern struct tm *localtime(const time_t *timer);
+extern time_t mktime(struct tm *timeptr);
+extern size_t strftime(char *str, size_t max, const char *format, const struct tm *timeptr);
+
 #endif
diff --git a/photon/libc/sys/horizon/__time.h b/photon/libc/sys/horizon/__time.h
new file mode 100644
index 0000000..48fe832
--- /dev/null
+++ b/photon/libc/sys/horizon/__time.h
@@ -0,0 +1,9 @@
+#ifndef SYS_HORIZON___TIME_H_
+#define SYS_HORIZON___TIME_H_
+
+#include <time.h>
+
+extern clock_t __sys_clock(void);
+extern time_t __sys_time(void);
+
+#endif
diff --git a/photon/libc/sys/horizon/sys/_time.h b/photon/libc/sys/horizon/sys/_time.h
new file mode 100644
index 0000000..293b20a
--- /dev/null
+++ b/photon/libc/sys/horizon/sys/_time.h
@@ -0,0 +1,6 @@
+#ifndef SYS_HORIZON___TIME_H_
+#define SYS_HORIZON___TIME_H_
+
+#define __SYS_CLOCKS_PER_SEC 1000000000
+
+#endif
diff --git a/photon/libc/sys/horizon/time.c b/photon/libc/sys/horizon/time.c
new file mode 100644
index 0000000..984b367
--- /dev/null
+++ b/photon/libc/sys/horizon/time.c
@@ -0,0 +1,19 @@
+#include <magenta/types.h>
+#include <magenta/clock.h>
+#include <time.h>
+
+clock_t __sys_clock(void)
+{
+    mx_time_val_t v;
+    mx_clock_get_time(MX_CLOCK_MONOTONIC, &v);
+
+    return (v.sec * CLOCKS_PER_SEC) + v.nsec;
+}
+
+time_t __sys_time(void)
+{
+    mx_time_val_t v;
+    mx_clock_get_time(MX_CLOCK_REALTIME, &v);
+
+    return v.sec;
+}
diff --git a/photon/libc/time/clock.c b/photon/libc/time/clock.c
new file mode 100644
index 0000000..2e95bb6
--- /dev/null
+++ b/photon/libc/time/clock.c
@@ -0,0 +1,7 @@
+#include <time.h>
+#include <__time.h>
+
+clock_t clock(void)
+{
+    return __sys_clock();
+}
diff --git a/photon/libc/time/gmtime.c b/photon/libc/time/gmtime.c
new file mode 100644
index 0000000..e69de29
diff --git a/photon/libc/time/localtime.c b/photon/libc/time/localtime.c
new file mode 100644
index 0000000..e69de29
diff --git a/photon/libc/time/mktime.c b/photon/libc/time/mktime.c
new file mode 100644
index 0000000..e69de29
diff --git a/photon/libc/time/strftime.c b/photon/libc/time/strftime.c
new file mode 100644
index 0000000..e69de29
diff --git a/photon/libc/time/time.c b/photon/libc/time/time.c
new file mode 100644
index 0000000..4a38ab2
--- /dev/null
+++ b/photon/libc/time/time.c
@@ -0,0 +1,12 @@
+#include <time.h>
+#include <__time.h>
+
+time_t time(time_t *p)
+{
+    time_t out = __sys_time();
+    if (p) {
+        *p = out;
+    }
+
+    return out;
+}