forked from len0rd/rockbox
d1c294c17d
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7039 a1c6a512-1295-4272-9138-f99709370657
84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
#ifndef __FILE_H__
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#define __FILE_H__
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#include "config.h"
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#include <stdio.h>
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#include <stdint.h>
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struct file_entry {
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char* name; // song name
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uint32_t hash;
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uint32_t song; // pointer to song
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uint32_t rundb; // pointer to rundb
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struct file_size {
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uint32_t name_len; // must be mulitple of 4
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} size;
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unsigned char flag; // flags
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};
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struct file_entry* new_file_entry(const uint32_t name_len);
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/* Creates a new file_entry with the specified sizes
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* Returns a pointer to the structure on success,
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* NULL on failure
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*/
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int file_entry_destruct(struct file_entry *e);
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/* Destructs the given file_entry and free()'s it's memory
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* returns 0 on success, 1 on failure
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*/
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inline int file_entry_resize(struct file_entry *e, const uint32_t name_len);
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/* Change the size of the entry
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* returns 0 on succes, 1 on failure
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*/
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int file_entry_serialize(FILE *fd, const struct file_entry *e);
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/* Serializes the entry in the file at the current position
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* returns 0 on success, 1 on failure
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*/
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int file_entry_unserialize(struct file_entry* *e, FILE *fd);
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/* Unserializes an entry from file into a new structure
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* The address of the structure is saved into *e
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* returns 0 on success
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* 1 on malloc() failure
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* 2 on fread() failure
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*/
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int file_entry_write(FILE *fd, struct file_entry *e, struct file_size *s);
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/* Writes the entry to file in the final form
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* returns 0 (0) on success, 1 (1) on failure
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*/
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inline int file_entry_compare(const struct file_entry *a, const struct file_entry *b);
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/* Compares 2 entries
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* When a < b it returns <0
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* a = b 0
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* a > b >0
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*/
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struct file_size* new_file_size();
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/* Creates a new size structure
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* returns a pointer to the structure on success,
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* NULL on failure
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*/
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inline uint32_t file_size_get_length(const struct file_size *size);
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/* Calculates the length of the entry when written by file_entry_write()
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* returns the length on success, 0xffffffff on failure
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*/
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inline int file_size_max(struct file_size *s, const struct file_entry *e);
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/* Updates the file_size structure to contain the maximal lengths of either
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* the original entry in s, or the entry e
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* returns 0 on success, 1 on failure
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*/
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int file_size_destruct(struct file_size *s);
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/* destructs the file_size structure
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* returns 0 on success, 1 on failure
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*/
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#endif
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