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FileID: implement FileID struct

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`FileID` should encapsulate `st_dev` and `st_ino`. It is a new abstraction
used to check if two files are the same. `FileID`s will be embeded inside
other struts like `buf_t` or `ff_visited_T`, where a full `FileInfo` would be
to big.
This commit is contained in:
Stefan Hoffmann
2014-05-10 11:49:25 +02:00
parent 8a85b37253
commit 4a22fb06b9
4 changed files with 152 additions and 7 deletions
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63
src/nvim/os/fs.c
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@@ -345,8 +345,69 @@ bool os_get_file_info_fd(int file_descriptor, FileInfo *file_info)
/// Compare the inodes of two FileInfos
///
/// @return `true` if the two FileInfos represent the same file.
bool os_file_info_id_equal(FileInfo *file_info_1, FileInfo *file_info_2)
bool os_file_info_id_equal(const FileInfo *file_info_1,
const FileInfo *file_info_2)
{
return file_info_1->stat.st_ino == file_info_2->stat.st_ino
&& file_info_1->stat.st_dev == file_info_2->stat.st_dev;
}
/// Get the `FileID` of a `FileInfo`
///
/// @param file_info Pointer to the `FileInfo`
/// @param[out] file_id Pointer to a `FileID`
void os_file_info_get_id(const FileInfo *file_info, FileID *file_id)
{
file_id->inode = file_info->stat.st_ino;
file_id->device_id = file_info->stat.st_dev;
}
/// Get the inode of a `FileInfo`
///
/// @deprecated Use `FileID` instead, this function is only needed in memline.c
/// @param file_info Pointer to the `FileInfo`
/// @return the inode number
uint64_t os_file_info_get_inode(const FileInfo *file_info)
{
return file_info->stat.st_ino;
}
/// Get the `FileID` for a given path
///
/// @param path Path to the file.
/// @param[out] file_info Pointer to a `FileID` to fill in.
/// @return `true` on sucess, `false` for failure.
bool os_get_file_id(const char *path, FileID *file_id)
{
uv_stat_t statbuf;
if (os_stat((char_u *)path, &statbuf) == OK) {
file_id->inode = statbuf.st_ino;
file_id->device_id = statbuf.st_dev;
return true;
}
return false;
}
/// Check if two `FileID`s are equal
///
/// @param file_id_1 Pointer to first `FileID`
/// @param file_id_2 Pointer to second `FileID`
/// @return `true` if the two `FileID`s represent te same file.
bool os_file_id_equal(const FileID *file_id_1, const FileID *file_id_2)
{
return file_id_1->inode == file_id_2->inode
&& file_id_1->device_id == file_id_2->device_id;
}
/// Check if a `FileID` is equal to a `FileInfo`
///
/// @param file_id Pointer to a `FileID`
/// @param file_info Pointer to a `FileInfo`
/// @return `true` if the `FileID` and the `FileInfo` represent te same file.
bool os_file_id_equal_file_info(const FileID *file_id,
const FileInfo *file_info)
{
return file_id->inode == file_info->stat.st_ino
&& file_id->device_id == file_info->stat.st_dev;
}