From bce12afbf6e10e0216a87ba15c246b446fc810e1 Mon Sep 17 00:00:00 2001
From: "Kirill A. Korinsky" <kirill@korins.ky>
Date: Thu, 8 Sep 2022 21:28:04 +0200
Subject: [PATCH] Implement `timespec_get`

---
 README.md                       |  4 ++--
 include/MacportsLegacySupport.h |  3 +++
 include/time.h                  | 15 +++++++++++++++
 src/time.c                      | 18 ++++++++++++++++++
 4 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 7746098..18c0d7a 100644
--- a/README.md
+++ b/README.md
@@ -85,8 +85,8 @@ Wrapped headers and replaced functions are:
   </tr>
   <tr>
     <td><code>time.h</code></td>
-    <td>Adds <code>clock_gettime</code> function (macOS10.11). Declares <code>asctime_r</code>, <code>ctime_r</code>, <code>gmtime_r</code>, and <code>localtime_r</code> functions that are otherwise hidden in the presence of <code>_ANSI_SOURCE</code>, <code>_POSIX_C_SOURCE</code>, or <code>_XOPEN_SOURCE</code> (OSX10.4)</td>
-    <td>OSX10.4(11)</td>
+    <td>Adds functions <code>clock_gettime</code>(macOS10.11) and <code>timespec_get</code>(macOS10.14). Defines <code>TIME_UTC</code> (macOS10.14). Declares <code>asctime_r</code>, <code>ctime_r</code>, <code>gmtime_r</code>, and <code>localtime_r</code> functions that are otherwise hidden in the presence of <code>_ANSI_SOURCE</code>, <code>_POSIX_C_SOURCE</code>, or <code>_XOPEN_SOURCE</code> (OSX10.4)</td>
+    <td>OSX10.4(11,14)</td>
   </tr>
   <tr>
     <td><code>wchar.h</code></td>
diff --git a/include/MacportsLegacySupport.h b/include/MacportsLegacySupport.h
index 09b0e8e..4e0c4ee 100644
--- a/include/MacportsLegacySupport.h
+++ b/include/MacportsLegacySupport.h
@@ -44,6 +44,9 @@
 /* clock_gettime */
 #define __MP_LEGACY_SUPPORT_GETTIME__         (__APPLE__ && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101200)
 
+/* timespec_get */
+#define __MP_LEGACY_SUPPORT_TIMESPEC_GET__    (__APPLE__ && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500)
+
 /* **at calls */
 #define __MP_LEGACY_SUPPORT_ATCALLS__         (__APPLE__ && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101000)
 
diff --git a/include/time.h b/include/time.h
index 8cbd86b..5ea5974 100644
--- a/include/time.h
+++ b/include/time.h
@@ -61,4 +61,19 @@ __MP__END_DECLS
 
 #endif /* _MP_LEGACY_SUPPORT_GETTIME__ */
 
+/* Legacy implementation of timespec */
+#if __MP_LEGACY_SUPPORT_TIMESPEC_GET__
+
+#ifndef TIME_UTC
+#define TIME_UTC	1	/* time elapsed since epoch */
+#endif
+
+__MP__BEGIN_DECLS
+
+extern int timespec_get(struct timespec *ts, int base);
+
+__MP__END_DECLS
+
+#endif /* __MP_LEGACY_SUPPORT_TIMESPEC_GET__ */
+
 #endif /* _MACPORTS_TIME_H_ */
diff --git a/src/time.c b/src/time.c
index 0e92654..bda2743 100644
--- a/src/time.c
+++ b/src/time.c
@@ -85,3 +85,21 @@ int clock_gettime( int clk_id, struct timespec *ts )
 */
 
 #endif
+
+#if __MP_LEGACY_SUPPORT_TIMESPEC_GET__
+
+int timespec_get(struct timespec *ts, int base)
+{
+  switch (base) {
+    case TIME_UTC:
+      if (clock_gettime(CLOCK_REALTIME, ts) == -1)
+        return 0;
+
+      return base;
+
+    default:
+      return 0;
+  }
+}
+
+#endif