From aa1eb39e9266c51082ed2d8744e97ad674b6496c Mon Sep 17 00:00:00 2001
From: "leleraffa97@hotmail.it" <leleraffa97@hotmail.it>
Date: Thu, 31 Aug 2017 16:56:06 +0200
Subject: File system interface Basic file system implementation Path
 resolution work in progress

---
 sw/z80/kernel/include/fs/fd.h | 102 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 sw/z80/kernel/include/fs/fd.h

(limited to 'sw/z80/kernel/include/fs/fd.h')

diff --git a/sw/z80/kernel/include/fs/fd.h b/sw/z80/kernel/include/fs/fd.h
new file mode 100644
index 0000000..d2fea2a
--- /dev/null
+++ b/sw/z80/kernel/include/fs/fd.h
@@ -0,0 +1,102 @@
+#ifndef __FD_H__
+#define __FD_H__
+
+#include "types.h"
+
+#define FD_MAX 32
+
+#define OPEN_READ       0x1
+#define OPEN_WRITE      0x2 
+#define OPEN_BIN        0x4
+#define OPEN_APPEND     0x8
+#define OPEN_ERASE      0x10
+#define OPEN_DIR        0x20
+#define OPEN_LINK       0x40
+
+#define LS_ALL       0x1
+
+/* declare dirent, not include */
+#ifndef __DIRENT_H__
+struct dirent;
+#endif
+
+/* set of operations callback for fd */
+struct fd_operations
+{
+    size_t (*readline)(inode_t, fsize_t, char *, char term);
+    size_t (*print)(inode_t, fsize_t, const char *);
+    size_t (*append)(inode_t, fsize_t*, const char *);
+
+    size_t (*read)(inode_t, fsize_t, void *, size_t);
+    size_t (*write)(inode_t, fsize_t, const void *, size_t);
+    size_t (*bin_append)(inode_t, fsize_t*, const void *, size_t);
+
+    size_t (*ls)(inode_t, struct dirent *, uint8_t);
+    size_t (*find)(inode_t, struct dirent *, const char *);
+    int8_t (*mkdir)(inode_t, const char *);
+    int8_t (*rmdir)(inode_t, const char *);
+    int8_t (*touch)(inode_t, const char *);
+    int8_t (*rm)(inode_t, const char *);
+    int8_t (*ln)(inode_t, const char *, const char *);
+
+    int8_t (*special)(inode_t, void *, size_t);
+};
+
+/* file descriptor */
+struct file_desc
+{
+    inode_t                 inode;  // inode pointed
+    fsize_t                 seek;   // virtual seek
+    devsize_t               begin;  // beginning of blocks
+    struct fd_operations    opers;  // bound operations
+};
+
+/* bitmap of used file descriptors */
+extern struct uint8_t fd_bmap[FD_TABLE_SIZE / 8];
+
+/* table of file descriptors */
+extern struct file_desc fd_table[FD_TABLE_SIZE];
+
+/* returns a free file descriptor */
+int8_t __fd_new();
+
+/* opens a file streaming of the cwd */
+int8_t __open_c_inode(uint8_t flags);
+
+/* opens a file streaming by a path */
+int8_t open(const char *path, uint8_t flags); 
+
+/* list content of directory */
+size_t ls(int8_t fd, struct dirent *buf, uint8_t all);
+
+/* find name through the directory entries */
+size_t find(int8_t fd, struct dirent *buf, const char *name);
+
+/* creates a new directory inside fd with the specified name */
+int8_t mkdir(int8_t fd, const char *name);
+
+/* creates a new file inside fd with the specified name */
+int8_t touch(int8_t fd, const char *name);
+
+/* creates a new symlink inside fd with the specified name */
+int8_t ln(int8_t fd, const char *name);
+
+/* change virtual seek position of the fd */
+int8_t seek(int8_t fd, fsize_t pos);
+
+/* reads a string from the fd until the terminator is reached */
+size_t readline(int8_t fd, char *buf, char term);
+
+/* writes a string into the fd */
+int8_t print(int8_t fd, const char *str);
+
+/* reads n bytes from the fd */
+size_t read(int8_t fd, void *buf, size_t n);
+
+/* writes n bytes into the fd */
+int8_t write(int8_t fd, const void *buf, size_t n);
+
+/* frees fd space */
+void close(int8_t fd);
+
+#endif  // __FD_H__
-- 
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