add libc building to agbcc.

1 files changed, 67 insertions, 0 deletions

diff --git a/libc/time/gmtime.c b/libc/time/gmtime.c
new file mode 100644
index 0000000..4f5bbe4
--- /dev/null
+++ b/libc/time/gmtime.c
@@ -0,0 +1,67 @@
+/*
+ * gmtime.c
+ * Original Author:	G. Haley
+ *
+ * Converts the calendar time pointed to by tim_p into a broken-down time
+ * expressed as Greenwich Mean Time (GMT). Returns a pointer to a structure
+ * containing the broken-down time, or a null pointer if GMT is not
+ * available.
+ */
+
+/*
+FUNCTION
+<<gmtime>>---convert time to UTC traditional form
+
+INDEX
+	gmtime
+
+ANSI_SYNOPSIS
+	#include <time.h>
+	struct tm *gmtime(const time_t *<[clock]>);
+	struct tm *gmtime_r(const time_t *<[clock]>, struct tm *<[res]>);
+
+TRAD_SYNOPSIS
+	#include <time.h>
+	struct tm *gmtime(<[clock]>)
+	const time_t *<[clock]>;
+	struct tm *gmtime_r(<[clock]>, <[res]>)
+	const time_t *<[clock]>;
+	struct tm *<[res]>;
+
+DESCRIPTION
+<<gmtime>> assumes the time at <[clock]> represents a local time.
+<<gmtime>> converts it to UTC (Universal Coordinated Time, also known in some
+countries as GMT, Greenwich Mean time), then converts the
+representation from the arithmetic representation to
+the traditional representation defined by <<struct tm>>.
+
+<<gmtime>> constructs the traditional time representation in static
+storage; each call to <<gmtime>> or <<localtime>> will overwrite the
+information generated by previous calls to either function.
+
+RETURNS
+A pointer to the traditional time representation (<<struct tm>>).
+
+PORTABILITY
+ANSI C requires <<gmtime>>.
+
+<<gmtime>> requires no supporting OS subroutines.
+*/
+
+#include <stdlib.h>
+#include <time.h>
+
+#define _GMT_OFFSET 0
+
+#ifndef _REENT_ONLY
+
+struct tm *
+_DEFUN (gmtime, (tim_p),
+	_CONST time_t * tim_p)
+{
+  time_t tim = *tim_p + _GMT_OFFSET;
+
+  return (localtime (&tim));
+}
+
+#endif