1 files changed, 95 insertions, 0 deletions

diff --git a/src/time64_limits.h b/src/time64_limits.h
new file mode 100644
index 0000000..91079af
--- /dev/null
+++ b/src/time64_limits.h
@@ -0,0 +1,95 @@
+/*
+   Maximum and minimum inputs your system's respective time functions
+   can correctly handle.  time64.h will use your system functions if
+   the input falls inside these ranges and corresponding USE_SYSTEM_*
+   constant is defined.
+*/
+
+#ifndef TIME64_LIMITS_H
+#define TIME64_LIMITS_H
+
+/* Max/min for localtime() */
+#define SYSTEM_LOCALTIME_MAX     2147483647
+#define SYSTEM_LOCALTIME_MIN    -2147483647-1
+
+/* Max/min for gmtime() */
+#define SYSTEM_GMTIME_MAX        2147483647
+#define SYSTEM_GMTIME_MIN       -2147483647-1
+
+/* Max/min for mktime() */
+static const struct tm SYSTEM_MKTIME_MAX = {
+    7,
+    14,
+    19,
+    18,
+    0,
+    138,
+    1,
+    17,
+    0
+#ifdef HAVE_TM_TM_GMTOFF
+    ,-28800
+#endif
+#ifdef HAVE_TM_TM_ZONE
+    ,(char*)"PST"
+#endif
+};
+
+static const struct tm SYSTEM_MKTIME_MIN = {
+    52,
+    45,
+    12,
+    13,
+    11,
+    1,
+    5,
+    346,
+    0
+#ifdef HAVE_TM_TM_GMTOFF
+    ,-28800
+#endif
+#ifdef HAVE_TM_TM_ZONE
+    ,(char*)"PST"
+#endif
+};
+
+/* Max/min for timegm() */
+#ifdef HAVE_TIMEGM
+static const struct tm SYSTEM_TIMEGM_MAX = {
+    7,
+    14,
+    3,
+    19,
+    0,
+    138,
+    2,
+    18,
+    0
+    #ifdef HAVE_TM_TM_GMTOFF
+        ,0
+    #endif
+    #ifdef HAVE_TM_TM_ZONE
+        ,(char*)"UTC"
+    #endif
+};
+
+static const struct tm SYSTEM_TIMEGM_MIN = {
+    52,
+    45,
+    20,
+    13,
+    11,
+    1,
+    5,
+    346,
+    0
+    #ifdef HAVE_TM_TM_GMTOFF
+        ,0
+    #endif
+    #ifdef HAVE_TM_TM_ZONE
+        ,(char*)"UTC"
+    #endif
+};
+#endif /* HAVE_TIMEGM */
+
+#endif /* TIME64_LIMITS_H */