Made the memory backend, should somewhat work

includes/miniffs.h

@@ -10,6 +10,15 @@
 #define MINIFFS_H
 
 #include <stdint.h>
+#include <stdbool.h>
+
+#define MINIFFS_VERSION_MAJOR (1)
+#define MINIFFS_VERSION_MINOR (0)
+#define MINIFFS_FILENAME_LENGTH (8)
+#define MINIFFS_EXTENSION_LENGTH (3)
+
+/* the full name is FILENAME + '.' + EXTENSION */
+#define MINIFFS_FULLNAME_LENGTH (MINIFFS_FILENAME_LENGTH + MINIFFS_EXTENSION_LENGTH + 1)
 
 /*
  * The pack(1) may not be needed, but better be safe than sorry to
@@ -18,8 +27,8 @@
 #pragma pack(1)
 typedef struct fileentry_t
 {
-    char name[8];
-    char ext[3];
+    char name[MINIFFS_FILENAME_LENGTH];
+    char ext[MINIFFS_EXTENSION_LENGTH];
     uint32_t size;
     uint32_t offset;
 } fileentry_t;
@@ -27,6 +36,10 @@ typedef struct fileentry_t
 typedef struct miniffs_header_t
 {
     uint32_t magic;
+    uint8_t fs_version_major;
+    uint8_t fs_version_minor;
+    uint8_t fs_filename_len;
+    uint8_t fs_extention_len;
     uint32_t entry_count;
     fileentry_t fent[];
 } miniffs_header_t;
@@ -49,9 +62,9 @@ typedef struct file_t
 } file_t;
 
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#define MAKE4(_a, _b, _c, _d) (((_a) & 0xFF) << 24) | (((_b) & 0xFF) << 16) | (((_c) & 0xFF) << 8) | ((_d) & 0xFF)
+#define MAKE4(_a, _b, _c, _d) ((((_a) & 0xFF) << 24) | (((_b) & 0xFF) << 16) | (((_c) & 0xFF) << 8) | ((_d) & 0xFF))
 #else
-#define MAKE4(_d, _c, _b, _a) (((_a) & 0xFF) << 24) | (((_b) & 0xFF) << 16) | (((_c) & 0xFF) << 8) | ((_d) & 0xFF)
+#define MAKE4(_d, _c, _b, _a) ((((_a) & 0xFF) << 24) | (((_b) & 0xFF) << 16) | (((_c) & 0xFF) << 8) | ((_d) & 0xFF))
 #endif
 #define MINIFFS_MAGIC MAKE4('M', 'F', 'F', 'S')
 
@@ -67,18 +80,23 @@ enum {
  */
 
 /* miniffs_openfs is backend specific and will be found in the backend header file */
-file_t *miniffs_open(miniffs_t *fs, char *filename);                  /***< Open a file */
-int miniffs_close(file_t *file);                                      /***< Close a file */
-void *miniffs_map(file_t *file);                                      /***< Map a file to memory */
-int miniffs_read(void *ptr, size_t size, size_t nmemb, file_t *file); /***< Read bytes from a file */
-int miniffs_seek(file_t *file, size_t offset, int whence);            /***< Set position in a file */
-size_t miniffs_tell(file_t *file);                                    /***< Get current position in a file*/
+file_t *miniffs_open(miniffs_t *fs, char *filename);                         /***< Open a file */
+int miniffs_close(file_t *file);                                             /***< Close a file */
+void *miniffs_map(file_t *file);                                             /***< Map a file to memory */
+int miniffs_read_blocks(void *ptr, size_t size, size_t nmemb, file_t *file); /***< Read blocks of bytes from a file */
+uint8_t miniffs_read(file_t *file);                                          /***< Read a single byte from a file */
+int miniffs_seek(file_t *file, size_t offset, int whence);                   /***< Set position in a file */
+size_t miniffs_tell(file_t *file);                                           /***< Get current position in a file*/
 
 typedef enum miniffs_error_t
 {
     MINIFFS_NOERROR = 0,
     MINIFFS_INVALID_FS,
+    MINIFFS_INVALID_NAME,
+    MINIFFS_INVALID_PARAMS,
     MINIFFS_FILE_NOT_FOUND,
+    MINIFFS_ALLOCATION_ERROR,
+    MINIFFS_END_OF_FILE,
     //MINIFFS_,
 } miniffs_error_t;
 
@@ -99,9 +117,10 @@ int miniffs_closefs(miniffs_t *fs);
 /*
  * Function that are private to the library
  */
-int miniffs_checkfs(miniffs_t *fs);
+bool miniffs_isvalidfs(miniffs_t *fs);
 fileentry_t *miniffs_findfile(miniffs_t *fs, char *filename);
-
+void miniffs_seterror(miniffs_error_t err);
+void *miniffs_getfileaddr(miniffs_t *fs, fileentry_t *fent);
 #endif /* __miniffs_internal */
 
 #endif /* MINIFFS_H */

includes/platform/file.h

@@ -15,8 +15,8 @@
 #ifdef BUILD_HOST_TOOLS
 typedef struct fs_fent_t
 {
-    char name[8];
-    char ext[3];
+    char name[MINIFFS_FILENAME_LENGTH];
+    char ext[MINIFFS_EXTENSION_LENGTH];
     bool deleted;
     bool mapped;
     uint32_t size;
@@ -27,6 +27,7 @@ typedef struct fs_fent_t
 typedef struct miniffs_t
 {
     miniffs_header_t *header;
+
 #ifdef BUILD_HOST_TOOLS
     uint32_t file_count;        /***< Number of valid files in the list */
     uint32_t file_list_count;   /***< Number of items in the list */
@@ -35,9 +36,11 @@ typedef struct miniffs_t
 #endif
 } miniffs_t;
 
-size_t host_map_file(char *filename, char **dest);
-void host_unmap_file(char **dest, size_t length);
-
 miniffs_t *miniffs_openfs(char *host_file); /***< Open a MiniFFS filesystem */
 
+#ifdef __miniffs_internal
+size_t host_map_file(char *filename, char **dest);
+void host_unmap_file(char **dest, size_t length);
+#endif
+
 #endif /* MINIFFS_PLATFORM_FILE_H */

includes/platform/memory.h

@@ -15,4 +15,6 @@ typedef struct miniffs_t
     void *memoryOffset;
 } miniffs_t;
 
+miniffs_t *miniffs_openfs(uintptr_t address); /***< Open a MiniFFS filesystem */
+
 #endif /* MINIFFS_PLATFORM_MEMORY_H */