DJGPP support added

ChangeLog

@@ -1,3 +1,31 @@
+2002-02-13  Guerrero, Juan Manuel  <st001906@hrz1.hrz.tu-darmstadt.de>
+
+	* doc/bison.texinfo:  Add DJGPP specific information about
+	file name extensions used on different file systems.
+
+	* src/files.c (output_files): MSDOS conditional removed.
+	New macro EXT_TYPE will provide at runtime the appropiate
+	output file extension.
+	(skeleton_find) [MSDOS]: __DJGPP__ conditional added to
+	inhibit the use of DOSish code.  POSIX like behaviour.
+
+	* src/getargs.c [AS_FILE_NAME]: __DJGPP__ conditional added.
+	Check at runtime if LFN-API (case preserving) is available or not.
+	Do not unconditionly convert upper case strings in lower case strings.
+
+	* src/system.h [MSDOS] [__GO32__]: __DJGPP__ conditional added.
+	__GO32__ is obsolete and its use is deprecated.
+	[MSDOS]: __DJGPP__ conditional added.  Use pathconf
+	to choose POSIX or DOS file extensions at run time.
+	[MSDOS] [__DJGPP__]: New macro EXT_TYPE.  If LFN-API is
+	available, the src or header file extension (.c or .h) will be
+	added to the output file name. If no LFN-API is available no src
+	or header file extension will be added to the output file name.
+	[MSDOS] [!__DJGPP__]: New macro EXT_TYPE. Src file and header
+        file extension will never be added to the output file name.
+	[!MSDOS]: New macro EXT_TYPE. Src file and header file
+	extensions will always be added to the output file name.
+
 2002-02-11  Akim Demaille  <akim@epita.fr>
 
 	* tests/regression.at (%nonassoc and eof): Don't include non

NEWS

@@ -3,6 +3,8 @@ Bison News
 
 Changes in version 1.33a:
 
+* DJGPP support added.
+
 * Fix portability problems within the test suite.
 
 Changes in version 1.33, 2002-02-07:

doc/bison.texinfo

@@ -304,6 +304,8 @@ Invoking Bison
 * Bison Options::     All the options described in detail,
 			in alphabetical order by short options.
 * Option Cross Key::  Alphabetical list of long options.
+* Extension Limitations Under DOS::  Bison output files extension differences
+					depending on the DOS/Windows file system flavour used.
 * VMS Invocation::    Bison command syntax on VMS.
 
 Copying This Manual
@@ -5047,6 +5049,8 @@ will produce @file{output.c++} and @file{outfile.h++}.
 			in alphabetical order by short options.
 * Environment Variables::  Variables which affect Bison execution.
 * Option Cross Key::  Alphabetical list of long options.
+* Extension Limitations Under DOS::  Bison output files extension differences
+					depending on the DOS/Windows file system flavour used.
 * VMS Invocation::    Bison command syntax on VMS.
 @end menu
 
@@ -5244,6 +5248,39 @@ the corresponding short option.
 @end example
 @end ifinfo
 
+@node Extension Limitations Under DOS
+@section Extension Limitations under DOS
+@cindex extension limitations under DOS
+@cindex DOS
+
+On DOS/Windows 9X systems the file name extensions of the output files,
+like @file{.tab.c}, that may be used depend on the file system in use.
+The plain DOS file system has limited file name length, does not allow
+the use of a set of certain illicit characters and does not allow more
+than a single dot in the file name.
+
+The DJGPP port of @code{bison} will detect at runtime if (LFN) long file name
+support is available or not.  LFN support will be available in a DOS session
+under Windows 9X and successors.  Windows NT 4.0 needs a special LFN driver
+(@file(ntlfn08b.zip) or later available at any simtelnet mirror in the /v2misc
+dir) for proper LFN support in a DOS session.  If LFN support is available the
+DJGPP port of @code{bison} will use the standard POSIX file name extensions
+of the output files.  If LFN support is not available, then the DJGPP port
+of @code{bison} will use DOS specific file name extensions.
+
+@noindent This table summarizes the used extensions:
+
+@multitable @columnfractions 0.1 0.45 0.45
+@item @tab LFN extension (Win9X) @tab SFN extension (plain DOS)
+@item @tab @file{.tab.c} @tab @file{_tab.c}
+@item @tab @file{.tab.h} @tab @file{_tab.h}
+@item @tab @file{.tab.cpp} @tab @file{_tab.cpp}
+@item @tab @file{.tab.hpp} @tab @file{_tab.hpp}
+@item @tab @file{.output} @tab @file{.out}
+@item @tab @file{.stype.h} @tab @file{.sth}
+@item @tab @file{.guard.c} @tab @file{.guc}
+@end multitable
+
 @node VMS Invocation
 @section Invoking Bison under VMS
 @cindex invoking Bison under VMS

src/files.c

@@ -214,7 +214,7 @@ skeleton_find (const char *envvar, const char *skeleton_name)
 {
   const char *res = getenv (envvar);
 
-#if defined (MSDOS) || defined (_WIN32)
+#if (defined (MSDOS) && !defined(__DJGPP__)) || defined (_WIN32)
   const char *cp = getenv ("INIT");
   if (!res)
     {
@@ -249,7 +249,7 @@ skeleton_find (const char *envvar, const char *skeleton_name)
 	  strcpy (res + (cp - program_name), skel_name);
 	}
     }
-#endif /* defined (MSDOS) || defined (_WIN32) */
+#endif /* (defined (MSDOS) && !defined (__DJGPP__)) || defined (_WIN32) */
   if (!res)
     res = skeleton_name;
 
@@ -452,9 +452,7 @@ compute_output_file_names (void)
   spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT);
 
   attrsfile = stringappend (short_base_name, EXT_STYPE_H);
-#ifndef MSDOS
+  attrsfile = stringappend (attrsfile, EXT_TYPE (header_extension));
-  attrsfile = stringappend (attrsfile, header_extension);
-#endif /* MSDOS */
 
 }
 
@@ -523,9 +521,7 @@ output_files (void)
       obstack_save (&attrs_obstack, attrsfile);
       obstack_free (&attrs_obstack, NULL);
       temp_name = stringappend (short_base_name, EXT_GUARD_C);
-#ifndef MSDOS
+      temp_name = stringappend (temp_name, EXT_TYPE (src_extension));
-      temp_name = stringappend (temp_name, src_extension);
-#endif /* MSDOS */
       obstack_save (&guard_obstack, temp_name);
       obstack_free (&guard_obstack, NULL);
     }

src/getargs.c

@@ -160,10 +160,15 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 | Process the options.  |
 `----------------------*/
 
-/* Under DOS, there is no difference on the case.  This can be
+/* Under plain DOS, there is no difference on the case.  This can be
    troublesome when looking for `.tab' etc.  */
 #ifdef MSDOS
-# define AS_FILE_NAME(File) (strlwr (File), (File))
+# if defined (__DJGPP__)
+/* Windows 9X and successors are case sensitive. */
+#  define AS_FILE_NAME(File) ((pathconf ((File), _PC_NAME_MAX) > 12) ? (File) : (strlwr (File), (File)))
+# else
+#  define AS_FILE_NAME(File) (strlwr (File), (File))
+# endif
 #else
 # define AS_FILE_NAME(File) (File)
 #endif

src/system.h

@@ -239,7 +239,7 @@ do {								\
 # define	MINSHORT	-32768
 #endif
 
-#if defined (MSDOS) && !defined (__GO32__)
+#if defined (MSDOS) && !defined (__GO32__) && !defined (__DJGPP__)
 # define	BITS_PER_WORD	16
 # define MAXTABLE	16383
 #else
@@ -261,19 +261,31 @@ do {								\
 # define EXT_OUTPUT	".output"
 # define EXT_STYPE_H	"_stype"
 # define EXT_GUARD_C	"_guard"
+# define EXT_TYPE(ext)	(ext)
 #else /* ! VMS */
 # ifdef MSDOS
-   /* MS DOS. */
+#  if defined (__DJGPP__)
-#  define EXT_TAB	"_tab"
+    /* DJGPP */
-#  define EXT_OUTPUT	".out"
+#   define EXT_TAB         	((pathconf (NULL, _PC_NAME_MAX) > 12) ? ".tab"    : "_tab")
-#  define EXT_STYPE_H	".sth"
+#   define EXT_OUTPUT      	((pathconf (NULL, _PC_NAME_MAX) > 12) ? ".output" : ".out")
-#  define EXT_GUARD_C	".guc"
+#   define EXT_STYPE_H     	((pathconf (NULL, _PC_NAME_MAX) > 12) ? ".stype"  : ".sth")
+#   define EXT_GUARD_C     	((pathconf (NULL, _PC_NAME_MAX) > 12) ? ".guard"  : ".guc")
+#   define EXT_TYPE(ext)	((pathconf (NULL, _PC_NAME_MAX) > 12) ? (ext)     : "")
+#  else /* ! __DJGPP__ */
+    /* MS DOS. */
+#   define EXT_TAB		"_tab"
+#   define EXT_OUTPUT		".out"
+#   define EXT_STYPE_H		".sth"
+#   define EXT_GUARD_C		".guc"
+#   define EXT_TYPE(ext)	""
+#  endif
 # else /* ! MSDOS */
   /* Standard. */
 #  define EXT_TAB	".tab"
 #  define EXT_OUTPUT	".output"
 #  define EXT_STYPE_H	".stype"
 #  define EXT_GUARD_C	".guard"
+#  define EXT_TYPE(ext)	(ext)
 # endif /* ! MSDOS */
 #endif /* ! VMS */