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win: include dirs: add some docs, minor refactor

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This commit is contained in:
Avi Halachmi (:avih) 2015-11-08 16:26:20 +02:00
parent 37e815eee1
commit 951c23f257
1 changed files with 18 additions and 4 deletions
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22
libtcc.c
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@ -1510,6 +1510,20 @@ LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
}
/* Windows stat* ( https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx ):
* - st_gid, st_ino, st_uid: only valid on "unix" file systems (not FAT, NTFS, etc)
* - st_atime, st_ctime: not valid on FAT, valid on NTFS.
* - Other fields should be reasonably compatible (and S_ISDIR should work).
*
* BY_HANDLE_FILE_INFORMATION ( https://msdn.microsoft.com/en-us/library/windows/desktop/aa363788%28v=vs.85%29.aspx ):
* - File index (combined nFileIndexHigh and nFileIndexLow) _may_ change when the file is opened.
* - But on NTFS: it's guaranteed to be the same value until the file is deleted.
* - On windows server 2012 there's a 128b file id, and the 64b one via
* nFileIndex* is not guaranteed to be unique.
*
* - MS Docs suggest to that volume number with the file index could be used to
* check if two handles refer to the same file.
*/
#ifndef _WIN32
typedef struct stat file_info_t;
#else
@ -1524,11 +1538,11 @@ int get_file_info(const char *fname, file_info_t *out_info)
int rv = 1;
HANDLE h = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE)
return rv;
rv = !GetFileInformationByHandle(h, out_info);
CloseHandle(h);
if (h != INVALID_HANDLE_VALUE) {
rv = !GetFileInformationByHandle(h, out_info);
CloseHandle(h);
}
return rv;
#endif
}