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Mail Archives: djgpp-workers/2014/04/22/07:11:50

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Tue, 22 Apr 2014 04:11:36 -0700 (PDT)
Date: Tue, 22 Apr 2014 14:11:36 +0300
Message-ID: <CAA2C=vBuWHmVNrRAcGDSXYLc8Eg_xsyMVszPzrxqHGrpVq2vmw@mail.gmail.com>
Subject: [PATCH] break xstat.c into pieces
From: Ozkan Sezer <sezeroz AT gmail DOT com>
To: djgpp-workers <djgpp-workers AT delorie DOT com>
Reply-To: djgpp-workers AT delorie DOT com 

--047d7bdc1750ec2e8504f79fadc6
Content-Type: text/plain; charset=UTF-8

The following patch breaks xstat.c into smaller pieces, so that, e.g.
mkdir() doesn't pull in unnecessary dependencies such as ctime.o.

For previous discussions, see:
http://www.delorie.com/djgpp/mail-archives/browse.cgi?p=djgpp-workers/2009/09/26/21:32:54
http://www.delorie.com/djgpp/mail-archives/browse.cgi?p=djgpp-workers/2014/04/21/17:23:29
http://www.delorie.com/djgpp/mail-archives/browse.cgi?p=djgpp-workers/2014/04/21/18:23:14

--
O.S.

Index: src/libc/posix/sys/stat/makefile
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/posix/sys/stat/makefile,v
retrieving revision 1.5
diff -u -p -r1.5 makefile
--- src/libc/posix/sys/stat/makefile	8 Mar 2003 00:41:17 -0000	1.5
+++ src/libc/posix/sys/stat/makefile	22 Apr 2014 10:51:10 -0000
@@ -18,5 +18,8 @@ SRC += st_loss.c
 SRC += stat.c
 SRC += umask.c
 SRC += xstat.c
+SRC += xstatbit.c
+SRC += xftimest.c
+SRC += xgetftim.c

 include $(TOP)/../makefile.inc
Index: src/libc/posix/sys/stat/xstat.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/posix/sys/stat/xstat.c,v
retrieving revision 1.8
diff -u -p -r1.8 xstat.c
--- src/libc/posix/sys/stat/xstat.c	10 Mar 2012 18:03:11 -0000	1.8
+++ src/libc/posix/sys/stat/xstat.c	22 Apr 2014 10:51:10 -0000
@@ -6,7 +6,6 @@
  *
  * Internal assist functions which are common to stat(), fstat() and lstat().
  *
- *
  * Copyright (c) 1994-96 Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
  *
  * This software may be used freely as long as the above copyright
@@ -32,90 +31,9 @@

 static int xstat_count = -1;

-/* Some fields of struct stat are expensive to compute under DOS,
-   because they require multiple disk accesses.  Fortunately, many
-   DOS programs don't care about these.  To leave both pedants (like
-   me) and performance-oriented guys happy, a variable is provided
-   which controls which expensive fields should be computed.  To get
-   the fastest stat() for your program, clear the bits for only those
-   features you need and set the others.
-
-   This improvement was suggested by Charles Sandmann
-   <sandmann AT clio DOT rice DOT edu> and DJ Delorie <dj AT delorie DOT com>.  */
-
-/* Please see the header file sys/stat.h for the definitions of _STAT_*. */
-
-/* Should we bother about executables at all? */
-#define _STAT_EXECBIT       (_STAT_EXEC_EXT | _STAT_EXEC_MAGIC)
-
-/* By default, all the bits are reset (including as yet unused ones), so
-   people who don't care will transparently have the full version.  */
-unsigned short _djstat_flags;
-
-/* As we depend on undocumented DOS features, we could fail in some
-   incompatible environment or future DOS versions.  If we do, the
-   following variable will have some of its bits set.  Each bit
-   describes a single feature which we tried to use and failed.
-   The function _djstat_describe_lossage() may be called to print a
-   human-readable description of the bits which were set by the last
-   call to f?stat().  This should make debugging f?stat() failures
-   in an unanticipated environment a lot easier.
-
-   This improvement was suggested by Charles Sandmann
-   <sandmann AT clio DOT rice DOT edu>.  */
-
-unsigned short _djstat_fail_bits;
-
 /* ----------------------------------------------------------------------- */

-/* Convert file date and time to time_t value suitable for
-   struct stat fields.  */
-
-time_t
-_file_time_stamp(unsigned int dos_ftime)
-{
-  struct tm file_tm;
-
-  memset(&file_tm, 0, sizeof(struct tm));
-  file_tm.tm_isdst = -1;    /* let mktime() determine if DST is in effect */
-
-  file_tm.tm_sec  = (dos_ftime & 0x1f) * 2;
-  file_tm.tm_min  = (dos_ftime >>  5) & 0x3f;
-  file_tm.tm_hour = (dos_ftime >> 11) & 0x1f;
-  file_tm.tm_mday = (dos_ftime >> 16) & 0x1f;
-  file_tm.tm_mon  = ((dos_ftime >> 21) & 0x0f) - 1; /* 0 = January */
-  file_tm.tm_year = (dos_ftime >> 25) + 80;
-
-  return mktime(&file_tm);
-}
-
-/* Get time stamp of a DOS file packed as a 32-bit int.
- * This does what Borland's getftime() does, except it doesn't
- * pollute the application namespace and returns an int instead
- * of struct ftime with packed bit-fields.
- */
-
-
-int
-_getftime(int fhandle, unsigned int *dos_ftime)
-{
-  __dpmi_regs regs;
-
-  regs.x.ax = 0x5700;
-  regs.x.bx = fhandle;
-  __dpmi_int(0x21, &regs);
-
-  if (regs.x.flags & 1)
-  {
-    errno = __doserr_to_errno(regs.x.ax);
-    return -1;
-  }
-
-  *dos_ftime = ((unsigned int)regs.x.dx << 16) + (unsigned int)regs.x.cx;
-
-  return 0;
-}
-
+#ifndef NO_ST_BLKSIZE
 /* Cache the cluster size (aka block size) for each drive letter, so we can
  * populate the st_blksize of struct stat easily. The cluster size is
  * measured in bytes.
@@ -190,6 +108,7 @@ _get_cached_blksize (const char *path)

   return cache_blksize[d];
 }
+#endif /* NO_ST_BLKSIZE */

 /* Invent an inode number for those files which don't have valid DOS
  * cluster number.  These could be: devices like /dev/nul; empty
Index: src/libc/posix/sys/stat/xstat.h
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/posix/sys/stat/xstat.h,v
retrieving revision 1.6
diff -u -p -r1.6 xstat.h
--- src/libc/posix/sys/stat/xstat.h	17 Oct 2002 23:00:25 -0000	1.6
+++ src/libc/posix/sys/stat/xstat.h	22 Apr 2014 10:51:10 -0000
@@ -52,6 +52,8 @@ extern long             __filelength(int
 extern int              _is_remote_handle(int);
 extern void             _djstat_describe_lossage(FILE *);
 extern int              _getftime(int, unsigned int *);
+#ifndef NO_ST_BLKSIZE
 extern blksize_t        _get_cached_blksize (const char *path);
+#endif

 #endif  /* __XSTAT_H */

--- /dev/null
+++ src/libc/posix/sys/stat/xstatbit.c	22 Apr 2014 10:51:10 -0000
@@ -0,0 +1,42 @@
+/* Copyright (C) 2012 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
+
+#include <libc/stubs.h>
+#include <sys/stat.h>
+#include "xstat.h"
+
+/* Some fields of struct stat are expensive to compute under DOS,
+   because they require multiple disk accesses.  Fortunately, many
+   DOS programs don't care about these.  To leave both pedants (like
+   me) and performance-oriented guys happy, a variable is provided
+   which controls which expensive fields should be computed.  To get
+   the fastest stat() for your program, clear the bits for only those
+   features you need and set the others.
+
+   This improvement was suggested by Charles Sandmann
+   <sandmann AT clio DOT rice DOT edu> and DJ Delorie <dj AT delorie DOT com>.  */
+
+/* Please see the header file sys/stat.h for the definitions of _STAT_*. */
+
+/* Should we bother about executables at all? */
+#define _STAT_EXECBIT       (_STAT_EXEC_EXT | _STAT_EXEC_MAGIC)
+
+/* By default, all the bits are reset (including as yet unused ones), so
+   people who don't care will transparently have the full version.  */
+unsigned short _djstat_flags;
+
+/* As we depend on undocumented DOS features, we could fail in some
+   incompatible environment or future DOS versions.  If we do, the
+   following variable will have some of its bits set.  Each bit
+   describes a single feature which we tried to use and failed.
+   The function _djstat_describe_lossage() may be called to print a
+   human-readable description of the bits which were set by the last
+   call to f?stat().  This should make debugging f?stat() failures
+   in an unanticipated environment a lot easier.
+
+   This improvement was suggested by Charles Sandmann
+   <sandmann AT clio DOT rice DOT edu>.  */
+
+unsigned short _djstat_fail_bits;
+

--- /dev/null
+++ src/libc/posix/sys/stat/xgetftim.c	22 Apr 2014 10:51:10 -0000
@@ -0,0 +1,51 @@
+/* Copyright (C) 2012 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
+
+/*
+ * Internal assist functions which are common to stat(), fstat() and lstat().
+ *
+ * Copyright (c) 1994-96 Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
+ *
+ * This software may be used freely as long as the above copyright
+ * notice is left intact.  There is no warranty on this software.
+ *
+ */
+
+#include <libc/stubs.h>
+#include <errno.h>
+#include <dos.h>
+#include <dpmi.h>
+#include <libc/farptrgs.h>
+#include <libc/dosio.h>
+#include <libc/bss.h>
+
+#include "xstat.h"
+
+/* Get time stamp of a DOS file packed as a 32-bit int.
+ * This does what Borland's getftime() does, except it doesn't
+ * pollute the application namespace and returns an int instead
+ * of struct ftime with packed bit-fields.
+ */
+
+
+int
+_getftime(int fhandle, unsigned int *dos_ftime)
+{
+  __dpmi_regs regs;
+
+  regs.x.ax = 0x5700;
+  regs.x.bx = fhandle;
+  __dpmi_int(0x21, &regs);
+
+  if (regs.x.flags & 1)
+  {
+    errno = __doserr_to_errno(regs.x.ax);
+    return -1;
+  }
+
+  *dos_ftime = ((unsigned int)regs.x.dx << 16) + (unsigned int)regs.x.cx;
+
+  return 0;
+}
+

--- /dev/null
+++ src/libc/posix/sys/stat/xftimest.c	22 Apr 2014 10:51:10 -0000
@@ -0,0 +1,41 @@
+/* Copyright (C) 2012 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
+
+/*
+ * Internal assist functions which are common to stat(), fstat() and lstat().
+ *
+ * Copyright (c) 1994-96 Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
+ *
+ * This software may be used freely as long as the above copyright
+ * notice is left intact.  There is no warranty on this software.
+ *
+ */
+
+#include <libc/stubs.h>
+#include <string.h>
+#include <time.h>
+
+#include "xstat.h"
+
+/* Convert file date and time to time_t value suitable for
+   struct stat fields.  */
+
+time_t
+_file_time_stamp(unsigned int dos_ftime)
+{
+  struct tm file_tm;
+
+  memset(&file_tm, 0, sizeof(struct tm));
+  file_tm.tm_isdst = -1;    /* let mktime() determine if DST is in effect */
+
+  file_tm.tm_sec  = (dos_ftime & 0x1f) * 2;
+  file_tm.tm_min  = (dos_ftime >>  5) & 0x3f;
+  file_tm.tm_hour = (dos_ftime >> 11) & 0x1f;
+  file_tm.tm_mday = (dos_ftime >> 16) & 0x1f;
+  file_tm.tm_mon  = ((dos_ftime >> 21) & 0x0f) - 1; /* 0 = January */
+  file_tm.tm_year = (dos_ftime >> 25) + 80;
+
+  return mktime(&file_tm);
+}
+

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