Merge remote-tracking branch 'origin/main' into LCD_API

project/Core/Inc/llfs.h

@@ -2,6 +2,7 @@
  * @file llfs.h
  * @brief Linked List Filesystem header (llfs)
  * @author Lorenz C.
+ * @version 0.1.1
  */
 
 #ifndef LLFS_H
@@ -30,20 +31,25 @@ struct llfs_data_file {
     const struct llfs_data_file* next;
 };
 
+/**
+ * @brief Initialize the llfs filesystem
+ * @note This function should be called before any other llfs function or POSIX file operation (e.g. fopen, fread, ...)
+ * @return 0 on success
+ */
+int8_t llfs_init(void);
+
 /**
  * @brief Get a list of files in the filesystem
  * Get a list of all the files in the filesystem.
  *
- * Use the filter to filter out files with a filename that do not match the filter. (e.g. "*.txt" or "*.png|*.jpg") (not
- * implemented yet) Multiple filters can be used by separating them with a pipe (|).
+ * Use the filter to filter out files with a filename that do not match the file extension filter.
  *
  * The following members of the llfs_file_t struct are set: name, len and data. @ref llfs_file_t
  *
- * @todo Implement file filter
  *
  * @param[out] file_list A pointer to an array of llfs_file_t to store the files in @ref llfs_file_t
  * @param[in] max_files The maximum number of files to return (size of file_list)
- * @param[in] filter A string with file extensions to filter out. (e.g. "*.txt" or "*.png|*.jpg")
+ * @param[in] filter A string with the file extensions to filter out. (e.g. "*.txt" or "*.png")
  * @return The number of files returned
  */
 size_t llfs_file_list(llfs_file_t* file_list, size_t max_files, char* filter);
@@ -58,4 +64,23 @@ size_t llfs_file_list(llfs_file_t* file_list, size_t max_files, char* filter);
  */
 llfs_file_t* llfs_file_open(const char* name);
 
+/**
+ * @brief Iterate over all files in the filesystem
+ * For each call (with the same mem pointer) the next file in the filesystem is returned.
+ * The first call should be with mem = NULL.
+ * If a filter is specified, only files with a filename that matches the filter are returned.
+ *
+ * @param[in, out] mem A pointer to a void* that is used internally to keep track of the current file
+ * @param[in] filter  A string with file extension to filter out. (e.g. "*.txt" or "*.png")
+ * @return The next file in the filesystem or NULL if there are no more files @ref llfs_file_t
+ */
+llfs_file_t* llfs_next_file(void** mem, char* filter);
+
+/**
+ * @brief Get the number of files in the filesystem
+ *
+ * @return The number of files in the filesystem
+ */
+size_t llfs_file_count(void);
+
 #endif // LLFS_H