CARPLAY版本整理

MXC_A27-PCB4.5-270T/FreeRTOS-Plus/FreeRTOS-FAT/include/ff_sys.h

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+/*
+ * FreeRTOS+FAT V2.3.3
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ *  ff_sys.h
+ *
+ *  This module allow to map several separate file-sub-systems into a root directory
+ *
+ *  For instance, a system with 3 sub sytems:
+ *
+ *      /flash :  NAND flash driver
+ *      /ram   :  RAM-disk driver
+ *      /      :  SD-card driver
+ *
+ *  In this example, the SD-card driver handles ALL files and directories which
+ *  do not match /flash/ * or /ram/ *
+ *
+ *  Now for instance a file call "/flash/etc/network.ini"
+ *  will be stored as "/etc/network.ini" on the NAND drive
+ *
+ *  This module along with ff_stdio.c make translations between absolute
+ *  and relative paths
+ */
+
+#ifndef FF_SYS_H
+    #define FF_SYS_H
+
+    #ifdef __cplusplus
+        extern "C" {
+    #endif
+
+    typedef struct FILE_SUB_SYSTEM
+    {
+        char pcPath[ 16 ];
+        BaseType_t xPathlen;
+        FF_IOManager_t * pxManager;
+    } FF_SubSystem_t;
+
+    typedef struct FF_DIR_HANDLER
+    {
+        union
+        {
+            struct
+            {
+                unsigned
+                    bEndOfDir : 1,
+                    bFirstCalled : 1,
+                    bIsValid : 1,
+                    bAddDotEntries : 2;
+            } bits;
+            unsigned uFlags;
+        } u;
+
+        /*
+         * path will contain the relative path. It will be used when calling +FAT functions
+         * like FF_FindFirst() / FF_FindNext()
+         * For instance, for "/flash/etc" path will become "/etc"
+         */
+        const char * pcPath;
+        FF_IOManager_t * pxManager; /* Will point to handler of this partition. */
+        BaseType_t xFSIndex;        /* The index of this entry, where 0 always means: the root system. */
+    } FF_DirHandler_t;
+
+/*
+ * Initialise (clear) the file system table
+ * This will also called by FF_FS_Add()
+ */
+    void FF_FS_Init( void );
+
+/*
+ * Add a file system
+ * The path must be absolute, e.g. start with a slash
+ * The second argument is the FF_Disk_t structure that is handling the driver
+ */
+    int FF_FS_Add( const char * pcPath,
+                   FF_Disk_t * pxDisk );
+
+/*
+ * Remove a file system
+ * which ws earlier added by ff_fs_ad()
+ */
+    void FF_FS_Remove( const char * pcPath );
+
+/*
+ * Internally used by ff_stdio:
+ * The ff_dir_handler helps to iterate through a mounte directory
+ *
+ * FF_FS_Find() will find a ff_dir_handler for a given path
+ */
+    int FF_FS_Find( const char * pcPath,
+                    FF_DirHandler_t * pxHandler );
+
+/*
+ * For internal use:
+ * Get the file system information, based on an index
+ */
+    int FF_FS_Get( int iIndex,
+                   FF_SubSystem_t * pxSystem );
+
+/*
+ * Returns the number of registered
+ * file systems
+ */
+    int FF_FS_Count( void );
+
+    #ifdef __cplusplus
+        } /* extern "C" */
+    #endif
+
+#endif /* FF_SYS_H */