From 0a595d68cd69c365da98c58babf2217bd501615d Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal@nekernel.org>
Date: Fri, 18 Apr 2025 12:35:28 +0200
Subject: kernel, HeFS (IMP): time algorithm.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>
---
 dev/kernel/FSKit/HeFS.h | 71 +++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 66 insertions(+), 5 deletions(-)

(limited to 'dev/kernel/FSKit')

diff --git a/dev/kernel/FSKit/HeFS.h b/dev/kernel/FSKit/HeFS.h
index 6e529ce4..8fdf933e 100644
--- a/dev/kernel/FSKit/HeFS.h
+++ b/dev/kernel/FSKit/HeFS.h
@@ -77,7 +77,7 @@ inline constexpr UInt16 kHeFSFileKindCount		  = 0x08;
 
 /// @brief HeFS blocks are array containing sparse blocks of data.
 /// @details The blocks are used to store the data of a file. Each block is a pointer to a block of data on the disk.
-inline constexpr UInt16 kHeFSBlockCount = 0x06;
+inline constexpr UInt16 kHeFSBlockCount = 0x10;
 
 struct PACKED HeFS_BOOT_NODE final
 {
@@ -103,9 +103,13 @@ struct PACKED HeFS_BOOT_NODE final
 /// @details Used to keep track of the INode, INodeDir allocation status.
 typedef Kernel::UInt64 ATime;
 
-inline constexpr ATime kHeFSTimeInvalid	= 0x0000000000000000;
-inline constexpr ATime kHeFSTimeMax	= 0xFFFFFFFFFFFFFFFF;
+inline constexpr ATime kHeFSTimeInvalid = 0x0000000000000000;
+inline constexpr ATime kHeFSTimeMax		= 0xFFFFFFFFFFFFFFFF;
 
+/// @brief HeFS index node.
+/// @details This structure is used to store the file information of a file.
+/// @note The index node is a special type of INode that contains the file information.
+/// @note The index node is used to store the file information of a file.
 struct PACKED HeFS_INDEX_NODE final
 {
 	Kernel::Utf16Char fName[kHeFSFileNameLen];
@@ -126,11 +130,14 @@ struct PACKED HeFS_INDEX_NODE final
 
 	Kernel::UInt64 fBlockRecoveryStart[kHeFSBlockCount];
 	Kernel::UInt64 fBlockRecoveryEnd[kHeFSBlockCount];
-	
+
 	/// @brief Red-black tree pointers.
 	Kernel::Lba fNext, fPrev, fChild, fParent;
 };
 
+/// @brief HeFS directory node.
+/// @details This structure is used to store the directory information of a file.
+/// @note The directory node is a special type of INode that contains the directory entries.
 struct PACKED HeFS_INDEX_NODE_DIRECTORY final
 {
 	Kernel::Utf16Char fName[kHeFSFileNameLen];
@@ -149,4 +156,58 @@ struct PACKED HeFS_INDEX_NODE_DIRECTORY final
 
 	/// @brief Red-black tree pointers.
 	Kernel::Lba fNext, fPrev, fChild, fParent;
-};
\ No newline at end of file
+};
+
+namespace Kernel::Detail
+{
+	/// @brief HeFS get year from ATime.
+	/// @param raw_atime the raw ATime value.
+	/// @return the year value.
+	/// @note The year is stored in the upper 32 bits of the ATime value.
+	inline UInt32 hefs_year_get(ATime raw_atime) noexcept
+	{
+		return (raw_atime & 0x00000000FFFFFFFF) >> 32;
+	}
+
+	/// @brief HeFS get month from ATime.
+	/// @param raw_atime the raw ATime value.
+	/// @return the month value.
+	/// @note The month is stored in the upper 24 bits of the ATime value.
+	inline UInt32 hefs_month_get(ATime raw_atime) noexcept
+	{
+		return (raw_atime & 0x00000000FFFFFFFF) >> 24;
+	}
+
+	/// @brief HeFS get day from ATime.
+	/// @param raw_atime the raw ATime value.
+	/// @return the day value.
+	/// @note The day is stored in the upper 16 bits of the ATime value.
+	inline UInt32 hefs_day_get(ATime raw_atime) noexcept
+	{
+		return (raw_atime & 0x00000000FFFFFFFF) >> 16;
+	}
+
+	/// @brief HeFS get hour from ATime.
+	/// @param raw_atime the raw ATime value.
+	/// @return the hour value.
+	/// @note The hour is stored in the upper 8 bits of the ATime value.
+	inline UInt32 hefs_hour_get(ATime raw_atime) noexcept
+	{
+		return (raw_atime & 0x00000000FFFFFFFF) >> 8;
+	}
+
+	/// @brief HeFS get minute from ATime.
+	/// @param raw_atime the raw ATime value.
+	/// @return the minute value.
+	/// @note The minute is stored in the lower 8 bits of the ATime value.
+	inline UInt32 hefs_minute_get(ATime raw_atime) noexcept
+	{
+		return (raw_atime & 0x00000000FFFFFFFF);
+	}
+
+	inline constexpr UInt32 kHeFSBaseYear = 1970;
+	inline constexpr UInt32 kHeFSBaseMonth = 1;
+	inline constexpr UInt32 kHeFSBaseDay = 1;
+	inline constexpr UInt32 kHeFSBaseHour = 0;
+	inline constexpr UInt32 kHeFSBaseMinute = 0;
+} // namespace Kernel::Detail
\ No newline at end of file
-- 
cgit v1.2.3