From d798c5e56a5da2dbce60a64e94fb605ea4d730df Mon Sep 17 00:00:00 2001
From: Nathan Fisher <nfisher.sr@gmail.com>
Date: Mon, 5 Feb 2024 19:12:51 -0500
Subject: [PATCH] Add conversion to timestamps

---
 datetime.c      | 45 +++++++++++++++++++++++++++++++++++++++++++--
 include/epoch.h |  9 +++++++--
 test/Makefile   | 42 +-----------------------------------------
 3 files changed, 51 insertions(+), 45 deletions(-)

diff --git a/datetime.c b/datetime.c
index fc72225..b8a3472 100644
--- a/datetime.c
+++ b/datetime.c
@@ -1,5 +1,46 @@
 #include "epoch.h"
+#include <stdint.h>
+#include <time.h>
 
-int32_t dateTimeGetYear(DateTime *dt) {
-    return dt->year.year;
+int32_t dateTimeGetYear(DateTime *self) {
+    return self->year.year;
+}
+
+int64_t dateTimeGetTimestampNaive(DateTime *self) {
+    int64_t seconds = 0;
+    Year    year    = (Year){ .tag = normalYear, .year = 1970 };
+    Month   month   = January;
+    int32_t oldyear = yearGetInner(&self->year);
+
+    if (oldyear < 1970) {
+        while (yearGetInner(&year) > oldyear) {
+            yearDecrement(&year);
+            seconds -= yearGetSeconds(&year);
+        }
+    } else if (oldyear > 1970) {
+        while (yearGetInner(&year) < oldyear) {
+            seconds += yearGetSeconds(&year);
+            yearIncrement(&year);
+        }
+    }
+    while (month < self->month) {
+        seconds += monthGetSeconds(month, &self->year);
+        monthIncrement(&month);
+    }
+    seconds += ((int64_t)self->day - 1) * SECONDS_PER_DAY;
+    seconds += (int64_t)self->hour * SECONDS_PER_HOUR;
+    seconds += (int64_t)self->minute * 60;
+    seconds += (int64_t)self->second;
+    return seconds;
+}
+
+int64_t dateTimeGetTimestamp(DateTime *self) {
+    int64_t seconds = dateTimeGetTimestampNaive(self);
+    seconds += timezoneAsSeconds(&self->zone);
+    return seconds;
+}
+
+void dateTimeGetTimeval(DateTime *self, struct timespec * ts) {
+    ts->tv_nsec = self->nanoseconds;
+    ts->tv_sec  = (time_t)dateTimeGetTimestamp(self);
 }
diff --git a/include/epoch.h b/include/epoch.h
index ad9d7a2..3d44757 100644
--- a/include/epoch.h
+++ b/include/epoch.h
@@ -70,7 +70,7 @@ typedef struct {
     uint8_t  hour;
     uint8_t  minute;
     uint8_t  second;
-    int64_t  microseconds;
+    int64_t  nanoseconds;
     TimeZone zone;
 } DateTime;
 
@@ -81,7 +81,7 @@ typedef enum {
     HourPrecision,
     MinutePrecision,
     SecondPrecision,
-    MicrosecondPrecision,
+    NanoSecondPrecision,
 } datetimePrecision;
 
 void yearNew(Year *year, int32_t inner);
@@ -105,5 +105,10 @@ int parseWeekday(const char *s);
 
 int offsetNew(TzOffset *offs, offsetSign sign, uint8_t hours, uint8_t minutes);
 void printTz(TimeZone *zone);
+int64_t timezoneAsSeconds(TimeZone *tz);
+
+int32_t dateTimeGetYear(DateTime *self);
+int64_t dateTimeGetTimestampNaive(DateTime *self);
+int64_t dateTimeGetTimestamp(DateTime *self);
 
 #endif // !LIBEPOCH_H
diff --git a/test/Makefile b/test/Makefile
index 1b492c1..0c22812 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -33,49 +33,9 @@
 include ../config.mk
 
 CFLAGS     += -I../include
-LDLIBS     += ../libhaggis.a
+LDLIBS     += ../libepoch.a
 LDLIBS     += $(LIBS)
 
-tests      += store_u16
-tests      += load_u16
-tests      += store_u32
-tests      += load_u32
-tests      += store_u64
-tests      += load_u64
-tests      += store_header
-tests      += check_header
-tests      += store_device
-tests      += load_device
-tests      += store_md5
-tests      += load_md5
-tests      += store_sha1
-tests      += load_sha1
-tests      += store_sha256
-tests      += load_sha256
-tests      += init_file_md5
-tests      += init_file_sha1
-tests      += init_file_sha256
-tests      += store_file_md5
-tests      += load_file_md5
-tests      += store_file_sha1
-tests      += load_file_sha1
-tests      += store_file_sha256
-tests      += load_file_sha256
-tests      += fnv1a_hash_inode
-tests      += fnv1a_hash_str
-tests      += linkmap_init
-tests      += linkmap_put
-tests      += create_dir_node
-tests      += create_symlink_node
-tests      += create_fifo_node
-tests      += create_dev_node
-tests      += create_file_node
-tests      += mq_push_pop
-tests      += extract_dev_node
-tests      += extract_dir_node
-tests      += extract_fifo_node
-tests      += extract_file_node
-tests      += extract_symlink_node
 tests      += extract_hardlink_node
 
 total      != echo $(tests) | wc -w | awk '{ print $$1 }'