[Emacs-diffs] Changes to emacs/lib-src/ntlib.c,v

[Eli Zaretskii]

CVSROOT:        /cvsroot/emacs
Module name:    emacs
Changes by:     Eli Zaretskii <eliz>    08/05/09 20:37:04

Index: ntlib.c
===================================================================
RCS file: /cvsroot/emacs/emacs/lib-src/ntlib.c,v
retrieving revision 1.16
retrieving revision 1.17
diff -u -b -r1.16 -r1.17
--- ntlib.c     8 Jan 2008 20:46:21 -0000       1.16
+++ ntlib.c     9 May 2008 20:37:04 -0000       1.17
@@ -27,6 +27,9 @@
 #include <stdio.h>
 #include <time.h>
 #include <direct.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
 
 #include "ntlib.h"
 
@@ -210,5 +213,149 @@
   return _chdir (path);
 }
 
+static FILETIME utc_base_ft;
+static long double utc_base;
+static int init = 0;
+
+static time_t
+convert_time (FILETIME ft)
+{
+  long double ret;
+
+  if (CompareFileTime (&ft, &utc_base_ft) < 0)
+    return 0;
+
+  ret = (long double) ft.dwHighDateTime
+    * 4096.0L * 1024.0L * 1024.0L + ft.dwLowDateTime;
+  ret -= utc_base;
+  return (time_t) (ret * 1e-7L);
+}
+
+static int
+is_exec (const char * name)
+{
+  char * p = strrchr (name, '.');
+  return
+    (p != NULL
+     && (stricmp (p, ".exe") == 0 ||
+        stricmp (p, ".com") == 0 ||
+        stricmp (p, ".bat") == 0 ||
+        stricmp (p, ".cmd") == 0));
+}
+
+#define IS_DIRECTORY_SEP(x) ((x) == '/' || (x) == '\\')
+
+/* We need this because nt/inc/sys/stat.h defines struct stat that is
+   incompatible with the MS run-time libraries.  */
+int
+stat (const char * path, struct stat * buf)
+{
+  WIN32_FIND_DATA wfd;
+  HANDLE fh;
+  int permission;
+  int len;
+  int rootdir = FALSE;
+  char *name = alloca (FILENAME_MAX);
+
+  if (!init)
+    {
+      /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
+      SYSTEMTIME st;
+
+      st.wYear = 1970;
+      st.wMonth = 1;
+      st.wDay = 1;
+      st.wHour = 0;
+      st.wMinute = 0;
+      st.wSecond = 0;
+      st.wMilliseconds = 0;
+
+      SystemTimeToFileTime (&st, &utc_base_ft);
+      utc_base = (long double) utc_base_ft.dwHighDateTime
+       * 4096.0L * 1024.0L * 1024.0L + utc_base_ft.dwLowDateTime;
+      init = 1;
+    }
+
+  if (path == NULL || buf == NULL || *path == '\0')
+    {
+      errno = EFAULT;
+      return -1;
+    }
+  if (_mbspbrk (path, "*?|<>\""))
+    {
+      errno = ENOENT;
+      return -1;
+    }
+
+  strcpy (name, path);
+  /* Remove trailing directory separator, unless name is the root
+     directory of a drive in which case ensure there is a trailing
+     separator. */
+  len = strlen (name);
+  rootdir = IS_DIRECTORY_SEP (name[0])
+    || (len == 3 && name[1] == ':' && IS_DIRECTORY_SEP (name[2]));
+  if (rootdir)
+    {
+      if (GetDriveType (name) < 2)
+       {
+         errno = ENOENT;
+         return -1;
+       }
+      memset (&wfd, 0, sizeof (wfd));
+      wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY;
+      wfd.ftCreationTime = utc_base_ft;
+      wfd.ftLastAccessTime = utc_base_ft;
+      wfd.ftLastWriteTime = utc_base_ft;
+      strcpy (wfd.cFileName, name);
+    }
+  else
+    {
+      if (IS_DIRECTORY_SEP (name[len-1]))
+       name[len - 1] = 0;
+
+      fh = FindFirstFile (name, &wfd);
+      if (fh == INVALID_HANDLE_VALUE)
+       {
+         errno = ENOENT;
+         return -1;
+       }
+      FindClose (fh);
+    }
+  buf->st_mode = (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ?
+    S_IFDIR : S_IFREG;
+  buf->st_nlink = 1;
+  buf->st_ino = 0;
+
+  if (name[0] && name[1] == ':')
+    buf->st_dev = tolower (name[0]) - 'a' + 1;
+  else
+    buf->st_dev = _getdrive ();
+  buf->st_rdev = buf->st_dev;
+
+  buf->st_size = wfd.nFileSizeLow;
+
+  /* Convert timestamps to Unix format. */
+  buf->st_mtime = convert_time (wfd.ftLastWriteTime);
+  buf->st_atime = convert_time (wfd.ftLastAccessTime);
+  if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
+  buf->st_ctime = convert_time (wfd.ftCreationTime);
+  if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
+
+  /* determine rwx permissions */
+  if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
+    permission = S_IREAD;
+  else
+    permission = S_IREAD | S_IWRITE;
+
+  if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+    permission |= S_IEXEC;
+  else if (is_exec (name))
+    permission |= S_IEXEC;
+
+  buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
+
+  return 0;
+}
+
 /* arch-tag: 7b63fb83-70ee-4124-8822-54e53e5d0773
    (do not change this comment) */