janwas
80057a82e5
improve CPU brand string detection wposix: no more ONCE during init (not thread-safe). also remove redundant round_up fold string_s into secure_crt vfs: small fixes+commenting improvements while calling VFS back into memory This was SVN commit r5054.
125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
/**
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* =========================================================================
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* File : vfs_tree.h
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* Project : 0 A.D.
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* Description : the actual 'filesystem' and its tree of directories.
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#ifndef INCLUDED_VFS_TREE
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#define INCLUDED_VFS_TREE
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class TFile; // must come before vfs_mount.h
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class TDir;
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#include "file.h" // DirEnt
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#include "vfs_mount.h" // Mount
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namespace ERR
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{
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const LibError TNODE_NOT_FOUND = -110600;
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// attemped to treat a file as directory or vice versa.
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const LibError TNODE_WRONG_TYPE = -110601;
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}
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// establish a root node and prepare node_allocator for use.
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extern void tree_init();
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// shut down entirely; destroys node_allocator. any further use after this
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// requires another tree_init.
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extern void tree_shutdown();
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extern void tree_display();
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// empty all directories and free their memory.
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// however, node_allocator's DynArray still remains initialized and
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// the root directory is usable (albeit empty).
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// use when remounting.
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extern void tree_clear();
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extern time_t tree_most_recent_mtime();
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// attempt to add <fn> to <dir>, storing its attributes.
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// overrides previously existing files of the same name if the new one
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// is more important, determined via priority and file location.
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// called by zip_cb and add_ent.
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//
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// note: if "priority" is the same, replace!
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// this makes sure mods/patches etc. actually replace files.
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extern LibError tree_add_file(TDir* td, const char* name, const Mount* m,
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off_t size, time_t mtime, uintptr_t memento);
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extern LibError tree_add_dir(TDir* dir, const char* name, TDir** ptd);
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enum TreeLookupFlags
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{
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LF_CREATE_MISSING = 1,
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LF_START_DIR = 2
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};
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// pass back file information for <path> (relative to VFS root).
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//
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// if <flags> & LF_CREATE_MISSING, the file is added to VFS unless
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// a higher-priority file of the same name already exists
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// (used by VFile_reload when opening for writing).
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//
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// output params are only valid if INFO::OK is returned.
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extern LibError tree_lookup(const char* path, TFile** ptf, uint flags = 0);
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// starting at VFS root, traverse <path> and pass back information
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// for its last directory component.
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//
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// if <flags> & LF_CREATE_MISSING, all missing subdirectory components are
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// added to the VFS.
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// if <flags> & LF_START_DIR, traversal starts at *ptd
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// (used when looking up paths relative to a mount point).
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//
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// <path> can be to a file or dir (in which case it must end in '/',
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// to make sure the last component is treated as a directory).
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//
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// output params are only valid if INFO::OK is returned.
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extern LibError tree_lookup_dir(const char* V_path, TDir** ptd, uint flags = 0);
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// iterate over all components in V_dir_path (must reference a directory,
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// i.e. end in slash). for any that are missing, add them with the
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// specified mount point. this is useful for mounting directories.
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//
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// passes back the last directory encountered.
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extern LibError tree_add_path(const char* V_dir_path, const Mount* m, TDir** ptd);
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extern LibError tree_dir_open(const char* V_dir_path, DirIterator* di);
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extern LibError tree_dir_next_ent(DirIterator* di, DirEnt* ent);
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extern LibError tree_dir_close(DirIterator* di);
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// given a file that is stored on disk and its VFS path,
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// return its OS path (for use with file.cpp).
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// used by vfs_realpath and VFile_reopen.
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extern LibError tree_realpath(TFile* tf, const char* V_path, char* P_real_path);
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extern LibError tree_stat(const TFile* tf, struct stat* s);
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extern const Mount* tfile_get_mount(const TFile* tf);
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extern uintptr_t tfile_get_memento(const TFile* tf);
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extern const char* tfile_get_atom_fn(const TFile* tf);
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extern void tfile_set_mount(TFile* tf, const Mount* m);
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extern void tree_update_file(TFile* tf, off_t size, time_t mtime);
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struct RealDir;
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extern RealDir* tree_get_real_dir(TDir* td);
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// for use in vfs_mount
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extern void tree_lock();
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extern void tree_unlock();
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#endif // #ifndef INCLUDED_VFS_TREE
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