io changes

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.20)
 include(cmake/color.cmake)
-set(BLT_VERSION 5.2.40)
+set(BLT_VERSION 5.2.41)
 
 set(BLT_TARGET BLT)
 

include/blt/fs/cstdio_wrappers.h

@@ -0,0 +1,56 @@
+#pragma once
+/*
+ *  Copyright (C) 2024  Brett Terpstra
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef BLT_FS_CSTDIO_WRAPPERS_H
+#define BLT_FS_CSTDIO_WRAPPERS_H
+
+#include <blt/fs/fwddecl.h>
+
+namespace blt::fs
+{
+    class file_reader_t final : public reader_t
+    {
+    public:
+        explicit file_reader_t(void* file): m_file(file)
+        {
+        }
+
+        i64 read(char* buffer, size_t bytes) override;
+
+    private:
+        void* m_file;
+    };
+
+    class file_writer_t final : public writer_t
+    {
+    public:
+        explicit file_writer_t(void* file): m_file(file)
+        {
+        }
+
+        i64 write(const char* buffer, size_t bytes) override;
+
+        i64 tell() override;
+
+        void seek(i64 offset, seek_origin origin = seek_origin::seek_set) override;
+    private:
+        void* m_file;
+    };
+}
+
+#endif //BLT_FS_CSTDIO_WRAPPERS_H

include/blt/fs/fwddecl.h

@@ -57,6 +57,16 @@ namespace blt::fs
 	class writer_t
 	{
 	public:
+		enum class seek_origin
+		{
+			// Seek from current position
+			seek_cur = SEEK_CUR,
+			// Seek from end of file. Not valid on binary streams
+			seek_end = SEEK_END,
+			// Seek from start of file
+			seek_set = SEEK_SET
+		};
+
 		virtual ~writer_t() = default;
 		explicit writer_t() = default;
 
@@ -71,6 +81,15 @@ namespace blt::fs
 		*/
 		virtual i64 write(const char* buffer, size_t bytes) = 0;
 
+		virtual i64 tell()
+		{
+			return 0;
+		}
+
+		virtual void seek(i64 offset, seek_origin origin = seek_origin::seek_set)
+		{
+		}
+
 		i64 write(const void* buffer, const size_t bytes)
 		{
 			return this->write(static_cast<const char*>(buffer), bytes);

include/blt/fs/stream_wrappers.h

@@ -33,10 +33,6 @@ namespace blt::fs
 	public:
 		explicit fstream_reader_t(std::istream& stream);
 
-		explicit fstream_reader_t(fstream_reader_t& copy) = delete;
-
-		fstream_reader_t& operator=(const fstream_reader_t& copy) = delete;
-
 		i64 read(char* buffer, size_t bytes) override;
 
 	private:
@@ -48,14 +44,14 @@ namespace blt::fs
 	public:
 		explicit fstream_writer_t(std::ostream& stream);
 
-		explicit fstream_writer_t(fstream_writer_t& copy) = delete;
-
-		fstream_writer_t& operator=(const fstream_writer_t& copy) = delete;
-
 		i64 write(const char* buffer, size_t bytes) override;
 
 		void flush() override;
 
+		i64 tell() override;
+
+		void seek(i64 offset, seek_origin origin = seek_origin::seek_set) override;
+
 		virtual ~fstream_writer_t() override // NOLINT
 		{
 			flush();

src/blt/fs/cstdio_wrappers.cpp

@@ -0,0 +1,42 @@
+/*
+ *  <Short Description>
+ *  Copyright (C) 2025  Brett Terpstra
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <cstdio>
+#include <blt/fs/cstdio_wrappers.h>
+
+namespace blt::fs
+{
+    i64 file_reader_t::read(char* buffer, const size_t bytes)
+    {
+        return fread(buffer, bytes, 1, static_cast<FILE*>(m_file));
+    }
+
+    i64 file_writer_t::write(const char* buffer, const size_t bytes)
+    {
+        return fwrite(buffer, bytes, 1, static_cast<FILE*>(m_file));
+    }
+
+    i64 file_writer_t::tell()
+    {
+        return ftell(static_cast<FILE*>(m_file));
+    }
+
+    void file_writer_t::seek(const i64 offset, const seek_origin origin)
+    {
+        fseek(static_cast<FILE*>(m_file), offset, static_cast<int>(origin));
+    }
+}

src/blt/fs/stream_wrappers.cpp

@@ -42,4 +42,25 @@ namespace blt::fs
 	{
 		m_stream->flush();
 	}
+
+	i64 fstream_writer_t::tell()
+	{
+		return m_stream->tellp();
+	}
+
+	void fstream_writer_t::seek(const i64 offset, const seek_origin origin)
+	{
+		switch (origin)
+		{
+		case seek_origin::seek_cur:
+			m_stream->seekp(offset, std::ios_base::cur);
+			break;
+		case seek_origin::seek_end:
+			m_stream->seekp(offset, std::ios_base::end);
+			break;
+		case seek_origin::seek_set:
+			m_stream->seekp(offset, std::ios_base::beg);
+			break;
+		}
+	}
 }