3 files changed, 241 insertions, 0 deletions
diff --git a/include/ocl/utility/cgi.hpp b/include/ocl/utility/cgi.hpp
new file mode 100644
index 0000000..8849c2d
--- /dev/null
+++ b/include/ocl/utility/cgi.hpp
@@ -0,0 +1,79 @@
+/*
+ * File: cgi.hpp
+ * Author: Amlal El Mahrouss,
+ * Copyright 2023-2025, Amlal El Mahrouss, Licensed under the Boost Software License.
+ */
+
+#ifndef _OCL_CGI_HPP
+#define _OCL_CGI_HPP
+
+#include <io/print.hpp>
+#include <core/chunk_string.hpp>
+#include <sstream>
+#include <format>
+
+namespace ocl
+{
+	namespace cgi
+	{
+		/// @brief CGI Writer class, writes to stdout; as CGI expects.
+		template <typename char_type = char>
+		class basic_writer
+		{
+		private:
+			basic_writer& eval_(const basic_chunk_string<char_type>& mime, const basic_chunk_string<char_type>& ss) noexcept
+			{
+				std::basic_stringstream<char_type> ss_out;
+
+				ss_out << std::format("Content-Type: {}\r\n", mime.str());
+				ss_out << std::format("Server: {}\r\n", "OCL/1.0");
+				ss_out << std::format("Content-Length: {}\r\n\r\n", ss.str().size());
+				ss_out << ss.str();
+
+				io::print(ss_out.str());
+
+				return *this;
+			}
+
+		public:
+			explicit basic_writer() = default;
+			virtual ~basic_writer() = default;
+
+			basic_writer& operator=(const basic_writer&) = default;
+			basic_writer(const basic_writer&)			 = default;
+
+		public:
+			friend void operator<<(basic_writer& self, const basic_chunk_string<char_type>& ss_in)
+			{
+				self = self.eval_("text/plain", ss_in);
+			}
+
+			basic_writer& binary(const basic_chunk_string<char_type>& ss_in)
+			{
+				return this->eval_("application/octet-stream", ss_in);
+			}
+
+			basic_writer& html(const basic_chunk_string<char_type>& ss_in)
+			{
+				return this->eval_("text/html", ss_in);
+			}
+
+			basic_writer& xml(const basic_chunk_string<char_type>& ss_in)
+			{
+				return this->eval_("application/xml", ss_in);
+			}
+
+			basic_writer& json(const basic_chunk_string<char_type>& ss_in)
+			{
+				return this->eval_("application/json", ss_in);
+			}
+
+			basic_writer& js(const basic_chunk_string<char_type>& ss_in)
+			{
+				return this->eval_("text/javascript", ss_in);
+			}
+		};
+	} // namespace cgi
+} // namespace ocl
+
+#endif // ifndef _OCL_CGI_HPP
diff --git a/include/ocl/utility/crc32.hpp b/include/ocl/utility/crc32.hpp
new file mode 100644
index 0000000..2bcab29
--- /dev/null
+++ b/include/ocl/utility/crc32.hpp
@@ -0,0 +1,81 @@
+/*
+ * File: crc32.hpp
+ * Purpose: CRC32 module.
+ * Author: Amlal El Mahrouss,
+ * Copyright 2025, Amlal El Mahrouss, Licensed under the Boost Software License.
+ */
+
+#ifndef _OCL_CRC32_HPP
+#define _OCL_CRC32_HPP
+
+#include <cstdint>
+#include <string>
+#include <cstddef>
+
+/// @brief Crc32 implementation in C++
+/// @author Amlal EL Mahrouss (amlal@nekernel.org)
+
+namespace ocl::crc32
+{
+	namespace detail
+	{
+		inline constexpr const std::uint16_t crc_sz_ = 256U;
+
+		inline std::uint32_t crc_array_[crc_sz_] = {
+			0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+			0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+			0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+			0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+			0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+			0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+			0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+			0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+			0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+			0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+			0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+			0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+			0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+			0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+			0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+			0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+			0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+			0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+			0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+			0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+			0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+			0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+			0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+			0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+			0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+			0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+			0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+			0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+			0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+			0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+			0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+			0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d};
+
+		template <typename char_type>
+		inline std::uint32_t
+		crc32(const char_type* in, size_t len) noexcept
+		{
+			if (!in || *in == 0)
+				return 0;
+
+			std::uint32_t crc = 0xffffffff;
+
+			while ((len--) > 0)
+				crc = (crc >> 8) ^ crc_array_[(crc ^ *(in++)) & 0xFF];
+
+			return ~crc;
+		}
+	} // namespace detail
+
+	template <typename char_type = char>
+	inline std::uint32_t hash(const std::basic_string<char_type>& in)
+	{
+		return detail::crc32(in.c_str(), in.size());
+	}
+} // namespace ocl::crc32
+
+#endif // !_OCL_CRC32_HPP
+\ No newline at end of file
diff --git a/include/ocl/utility/embfs.hpp b/include/ocl/utility/embfs.hpp
new file mode 100644
index 0000000..8a716ce
--- /dev/null
+++ b/include/ocl/utility/embfs.hpp
@@ -0,0 +1,81 @@
+/*
+ * File: embfs.hpp
+ * Purpose: Embedded File System.
+ * Author: Amlal El Mahrouss (amlal@nekernel.org)
+ * Copyright 2025, Amlal El Mahrouss, Licensed under the Boost Software License.
+ */
+
+#ifndef _OCL_EMBFS_HPP
+#define _OCL_EMBFS_HPP
+
+#include <cstdint>
+#include <cstddef>
+
+/// @brief A filesystem designed for tiny storage medias.
+/// @author Amlal EL Mahrouss (amlal@nekernel.org)
+
+namespace ocl::embfs
+{
+	namespace traits
+	{
+		struct embfs_superblock;
+		struct embfs_inode;
+
+		inline constexpr const size_t _superblock_name_len	  = 16;
+		inline constexpr const size_t _superblock_reserve_len = 462;
+
+		inline constexpr const size_t _inode_name_len	= 128;
+		inline constexpr const size_t _inode_arr_len	= 12;
+		inline constexpr const size_t _inode_lookup_len = 8;
+
+#if defined(EMBFS_28BIT_LBA)
+		typedef std::uint32_t lba_t;
+#elif defined(EMBFS_48BIT_LBA)
+		typedef std::uint64_t lba_t;
+#else
+		typedef std::uint32_t lba_t;
+#endif
+
+		typedef std::int16_t sword_t;
+
+		typedef std::int32_t sdword_t;
+
+		typedef std::uint8_t utf8_char_t;
+
+		/// @brief Superblock data structure
+		struct embfs_superblock
+		{
+			sword_t		s_block_mag;
+			sdword_t	s_num_inodes;
+			sdword_t	s_part_size;
+			sdword_t	s_part_used;
+			sdword_t	s_version;
+			sword_t		s_sector_sz;
+			lba_t		s_inode_start;
+			lba_t		s_inode_end;
+			utf8_char_t s_name[_superblock_name_len];
+			utf8_char_t s_reserved[_superblock_reserve_len];
+		};
+
+		/// @brief Indexed node structure.
+		/// @brief i_name file name
+		/// @brief i_size_virt, i_size_phys: virtual and physical (sector count) size.
+		/// @brief i_offset direct block pointer.
+		/// @brief i_checksum crc32 checksum.
+		/// @brief i_flags_perms flags and permissions
+		/// @brief i_acl_* ACL to keep track of inode allocation status.
+		struct embfs_inode
+		{
+			utf8_char_t i_name[_inode_name_len];
+			sword_t		i_size_virt, i_size_phys;
+			lba_t		i_offset[_inode_lookup_len];
+			sword_t		i_checksum, i_flags_perms;
+			lba_t		i_acl_creat, i_acl_edit, i_acl_delet;
+		};
+
+		/// @brief Indexed node linear array.
+		typedef embfs_inode embfs_inode_arr_t[_inode_arr_len];
+	} // namespace traits
+} // namespace ocl::embfs
+
+#endif // ifndef _OCL_EMBFS_HPP
+\ No newline at end of file