From 50db0db06a5569f60d29342dc0b8e11a5928725f Mon Sep 17 00:00:00 2001
From: Anna Schumaker <Anna@NoWheyCreamery.com>
Date: Fri, 12 Aug 2016 15:20:23 -0400
Subject: [PATCH] core/date: Add functions for reading and writing date stamps

The date stamp is a single value that represents year, month, and day.
This should be slightly easier than working with three separate values.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
---
 core/date.c         | 13 +++++++++++++
 include/core/date.h |  2 ++
 tests/core/date.c   | 10 ++++++++++
 3 files changed, 25 insertions(+)

diff --git a/core/date.c b/core/date.c
index 289983e9..ce2f4c16 100644
--- a/core/date.c
+++ b/core/date.c
@@ -3,6 +3,7 @@
  */
 #include <core/date.h>
 #include <core/string.h>
+#include <endian.h>
 #include <time.h>
 
 
@@ -28,11 +29,23 @@ void date_read(struct file *f, struct date *date)
 	file_readf(f, "%u %u %u", &date->d_year, &date->d_month, &date->d_day);
 }
 
+void date_read_stamp(struct file *f, struct date *date)
+{
+	uint32_t stamp;
+	file_readf(f, "%u", &stamp);
+	date->d_stamp = be32toh(stamp);
+}
+
 void date_write(struct file *f, struct date *date)
 {
 	file_writef(f, "%u %u %u", date->d_year, date->d_month, date->d_day);
 }
 
+void date_write_stamp(struct file *f, struct date *date)
+{
+	file_writef(f, "%u", htobe32(date->d_stamp));
+}
+
 gchar *date_string(const struct date *date)
 {
 	struct tm tm = {
diff --git a/include/core/date.h b/include/core/date.h
index d9879f53..77186560 100644
--- a/include/core/date.h
+++ b/include/core/date.h
@@ -28,9 +28,11 @@ void date_today(struct date *);
 
 /* Read the date from file. */
 void date_read(struct file *, struct date *);
+void date_read_stamp(struct file *, struct date *);
 
 /* Write the date to file. */
 void date_write(struct file *, struct date *);
+void date_write_stamp(struct file *, struct date *);
 
 /*
  * Convert the date into a string.
diff --git a/tests/core/date.c b/tests/core/date.c
index 90d7ba14..332115a3 100644
--- a/tests/core/date.c
+++ b/tests/core/date.c
@@ -35,6 +35,11 @@ void test_date()
 	g_assert_cmpuint(date.d_month, ==, today->tm_mon  +    1);
 	g_assert_cmpuint(date.d_day,   ==, today->tm_mday);
 	date_write(&f, &date);
+	file_writef(&f, "\n");
+
+	date_set(&date, 1992, 10, 05);
+	g_assert_cmpuint(date.d_stamp, ==, 84543432);
+	date_write_stamp(&f, &date);
 
 	file_close(&f);
 	file_open(&f, OPEN_READ);
@@ -51,6 +56,11 @@ void test_date()
 	g_assert_cmpuint(date.d_year,  ==, today->tm_year + 1900);
 	g_assert_cmpuint(date.d_month, ==, today->tm_mon  +    1);
 	g_assert_cmpuint(date.d_day,   ==, today->tm_mday);
+
+	date_read_stamp(&f, &date);
+	g_assert_cmpuint(date.d_year,  ==, 1992);
+	g_assert_cmpuint(date.d_month, ==,   10);
+	g_assert_cmpuint(date.d_day,   ==,    5);
 	file_close(&f);
 }