X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/cfe5fbc0a12e2ed5c5b35125b0ff276a940b79f2..27110317b8a2d2a4008e41be26e2f0c76416cbc8:/src/files.c

diff --git a/src/files.c b/src/files.c
index e032d650..235deb03 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1,117 +1,81 @@
 /* Open and close files for bison,
-   Copyright (C) 1984, 1986, 1989, 1992 Free Software Foundation, Inc.
+   Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
 
-This file is part of Bison, the GNU Compiler Compiler.
+   This file is part of Bison, the GNU Compiler Compiler.
 
-Bison is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+   Bison is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
 
-Bison is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+   Bison is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
 
-You should have received a copy of the GNU General Public License
-along with Bison; see the file COPYING.  If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with Bison; see the file COPYING.  If not, write to the Free
+   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
 
 
 #include "system.h"
-
-#if defined (VMS) & !defined (__VMS_POSIX)
-#include <ssdef.h>
-#define unlink delete
-#ifndef XPFILE
-#define XPFILE "GNU_BISON:[000000]BISON.SIMPLE"
-#endif
-#ifndef XPFILE1
-#define XPFILE1 "GNU_BISON:[000000]BISON.HAIRY"
-#endif
-#endif
-
-#if defined (_MSC_VER)
-#ifndef XPFILE
-#define XPFILE "c:/usr/local/lib/bison.simple"
-#endif
-#ifndef XPFILE1
-#define XPFILE1 "c:/usr/local/lib/bison.hairy"
-#endif
-#endif
-
-#include <stdio.h>
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
+#include "getargs.h"
 #include "files.h"
-#include "alloc.h"
+#include "xalloc.h"
 #include "gram.h"
 #include "complain.h"
 
 FILE *finput = NULL;
 FILE *foutput = NULL;
-FILE *fdefines = NULL;
-FILE *ftable = NULL;
-FILE *fattrs = NULL;
 FILE *fguard = NULL;
-FILE *faction = NULL;
-FILE *fparser = NULL;
+
+struct obstack action_obstack;
+struct obstack attrs_obstack;
+struct obstack table_obstack;
+struct obstack defines_obstack;
 
 /* File name specified with -o for the output file, or 0 if no -o.  */
 char *spec_outfile;
 
 char *infile;
-char *outfile;
-char *defsfile;
-char *tabfile;
 char *attrsfile;
 char *guardfile;
-char *actfile;
-char *tmpattrsfile;
-char *tmptabfile;
-char *tmpdefsfile;
 
-extern int noparserflag;
+static char *base_name;
+static char *short_base_name;
 
-extern char	*mktemp();	/* So the compiler won't complain */
-extern char	*getenv();
-
-char *stringappend PARAMS((char *, int, char *));
-void openfiles PARAMS((void));
-void open_extra_files PARAMS((void));
-
-extern char *program_name;
-extern int verboseflag;
-extern int definesflag;
-int fixed_outfiles = 0;
 
+/*--------------------------.
+| Is SUFFIX ending STRING?  |
+`--------------------------*/
 
-char *
-stringappend (char *string1, int end1, char *string2)
+static int
+strsuffix (const char *string, const char *suffix)
 {
-  register char *ostring;
-  register char *cp, *cp1;
-  register int i;
-
-  cp = string2;  i = 0;
-  while (*cp++) i++;
-
-  ostring = NEW2(i+end1+1, char);
+  size_t string_len = strlen (string);
+  size_t suffix_len = strlen (suffix);
+  if (suffix_len <= string_len)
+    return !strcmp (string + string_len - suffix_len, suffix);
+  else
+    return 0;
+}
 
-  cp = ostring;
-  cp1 = string1;
-  for (i = 0; i < end1; i++)
-    *cp++ = *cp1++;
 
-  cp1 = string2;
-  while ((*cp++ = *cp1++))
-    ;
+/*-----------------------------------------------------------------.
+| Return a newly allocated string composed of the concatenation of |
+| STRING1, and STRING2.                                            |
+`-----------------------------------------------------------------*/
 
-  return ostring;
+static char *
+stringappend (const char *string1, const char *string2)
+{
+  size_t len = strlen (string1) + strlen (string2);
+  char *res = XMALLOC (char, len + 1);
+  char *cp;
+  cp = stpcpy (res, string1);
+  cp = stpcpy (cp, string2);
+  return res;
 }
 
 /*-----------------------------------------------------------------.
@@ -119,10 +83,10 @@ stringappend (char *string1, int end1, char *string2)
 | if fails.                                                        |
 `-----------------------------------------------------------------*/
 
-static FILE *
-tryopen (char *name, char *mode)
+FILE *
+xfopen (const char *name, const char *mode)
 {
-  FILE	*ptr;
+  FILE *ptr;
 
   ptr = fopen (name, mode);
   if (!ptr)
@@ -135,8 +99,8 @@ tryopen (char *name, char *mode)
 | Try to close file PTR, and print an error message if fails.  |
 `-------------------------------------------------------------*/
 
-static int
-tryclose (FILE *ptr)
+int
+xfclose (FILE *ptr)
 {
   int result;
 
@@ -149,311 +113,186 @@ tryclose (FILE *ptr)
 
   return result;
 }
-
-/* JF this has been hacked to death.  Nowaday it sets up the file names for
-   the output files, and opens the tmp files and the parser */
-void
-openfiles (void)
+
+/*--------------------------------------------------.
+| Save the content of the obstack OBS in FILENAME.  |
+`--------------------------------------------------*/
+
+static void
+obstack_save (struct obstack *obs, const char *filename)
 {
-  char *name_base;
-#ifdef MSDOS
-  register char *cp;
-#endif
-  char *filename;
-  int base_length;
-  int short_base_length;
-
-#if defined (VMS) & !defined (__VMS_POSIX)
-  char *tmp_base = "sys$scratch:b_";
-#else
-  char *tmp_base = "/tmp/b.";
-#endif
-  int tmp_len;
+  FILE *out = xfopen (filename, "w");
+  size_t size = obstack_object_size (obs);
+  fwrite (obstack_finish (obs), 1, size, out);
+  xfclose (out);
+}
+
+
+/*------------------------------------------------------------------.
+| Return the path to the skeleton which locaction might be given in |
+| ENVVAR, otherwise return SKELETON.                                |
+`------------------------------------------------------------------*/
+
+const char *
+skeleton_find (const char *envvar, const char *skeleton)
+{
+  const char *res = getenv (envvar);
 
 #ifdef MSDOS
-  tmp_base = getenv ("TMP");
-  if (tmp_base == 0)
-    tmp_base = "";
-  strlwr (infile);
-#endif /* MSDOS */
+  const char *cp;
 
-#if (defined(_WIN32) && !defined(__CYGWIN32__))
-  tmp_base = getenv ("TEMP");		/* Windows95 defines this ... */
-  if (tmp_base == 0)
-    tmp_base = getenv ("Temp");		/* ... while NT prefers this */
-  if (tmp_base == 0)
-    tmp_base = "";
-  strlwr (infile);
-#endif /* _WIN32 && !__CYGWIN32__ */
+  /* File doesn't exist in current directory; try in INIT directory.  */
+  if (!res && (cp = getenv ("INIT")))
+    {
+      res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2);
+      sprintf (res, "%s%c%s", cp, '/', skeleton);
+    }
+#endif /* !MSDOS */
 
-#if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__))
-  {
-    char *tmp_ptr = getenv("TMPDIR");
+  if (!res)
+    res = skeleton;
 
-    if (tmp_ptr != 0)
-      tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b.");
-  }
-#endif  /* unix || __unix || __unix__ */
+  return res;
+}
 
-  tmp_len = strlen (tmp_base);
+
+/*----------------------------------------.
+| Compute BASE_NAME and SHORT_BASE_NAME.  |
+`----------------------------------------*/
 
+/* FIXME: Should use xstrndup. */
+
+static void
+compute_base_names (void)
+{
+  size_t base_length;
+  size_t short_base_length;
+
+  /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c),
+     BASE_NAME and SHORT_BASE_NAME are `foo'.
+
+     If --output=foo.tab.c was specified, BASE_NAME is `foo.tab' and
+     SHORT_BASE_NAME is `foo'.
+
+     The precise -o name will be used for FTABLE.  For other output
+     files, remove the ".c" or ".tab.c" suffix.  */
   if (spec_outfile)
     {
-      /* -o was specified.  The precise -o name will be used for ftable.
-	 For other output files, remove the ".c" or ".tab.c" suffix.  */
-      name_base = spec_outfile;
 #ifdef MSDOS
-      strlwr (name_base);
+      strlwr (spec_outfile);
 #endif /* MSDOS */
       /* BASE_LENGTH includes ".tab" but not ".c".  */
-      base_length = strlen (name_base);
-      if (!strcmp (name_base + base_length - 2, ".c"))
+      base_length = strlen (spec_outfile);
+      if (strsuffix (spec_outfile, ".c"))
 	base_length -= 2;
       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
       short_base_length = base_length;
-      if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
+      if (strsuffix (spec_outfile, ".tab") || strsuffix (spec_outfile, "_tab"))
 	short_base_length -= 4;
-      else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
-	short_base_length -= 4;
-    }
-  else if (spec_file_prefix)
-    {
-      /* -b was specified.  Construct names from it.  */
-      /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
-      short_base_length = strlen (spec_file_prefix);
-      /* Count room for `.tab'.  */
-      base_length = short_base_length + 4;
-      name_base = (char *) xmalloc (base_length + 1);
-      /* Append `.tab'.  */
-      strcpy (name_base, spec_file_prefix);
-#ifdef VMS
-      strcat (name_base, "_tab");
-#else
-      strcat (name_base, ".tab");
-#endif
-#ifdef MSDOS
-      strlwr (name_base);
-#endif /* MSDOS */
-    }
-  else
-    {
-      /* -o was not specified; compute output file name from input
-	 or use y.tab.c, etc., if -y was specified.  */
-
-      name_base = fixed_outfiles ? "y.y" : infile;
-
-      /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
+      base_name = strndup (spec_outfile, base_length);
+      short_base_name = strndup (spec_outfile, short_base_length);
 
-      base_length = strlen (name_base);
-      if (!strcmp (name_base + base_length - 2, ".y"))
-	base_length -= 2;
-      short_base_length = base_length;
-
-#ifdef VMS
-      name_base = stringappend(name_base, short_base_length, "_tab");
-#else
-#ifdef MSDOS
-      name_base = stringappend(name_base, short_base_length, "_tab");
-#else
-      name_base = stringappend(name_base, short_base_length, ".tab");
-#endif /* not MSDOS */
-#endif
-      base_length = short_base_length + 4;
+      return;
     }
 
-  finput = tryopen(infile, "r");
+  /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME
+     are `foo'.
 
-  if (! noparserflag)
+     Construct names from it.  */
+  if (spec_file_prefix)
     {
-      filename = getenv("BISON_SIMPLE");
 #ifdef MSDOS
-      /* File doesn't exist in current directory; try in INIT directory.  */
-      cp = getenv("INIT");
-      if (filename == 0 && cp != NULL)
-        {
-          filename = xmalloc(strlen(cp) + strlen(PFILE) + 2);
-          strcpy(filename, cp);
-          cp = filename + strlen(filename);
-          *cp++ = '/';
-          strcpy(cp, PFILE);
-        }
+      strlwr (spec_file_prefix);
 #endif /* MSDOS */
-      fparser = tryopen(filename ? filename : PFILE, "r");
-    }
+      short_base_name = xstrdup (spec_file_prefix);
 
-  if (verboseflag)
-    {
-#ifdef MSDOS
-      outfile = stringappend(name_base, short_base_length, ".out");
-#else
-      /* We used to use just .out if spec_name_prefix (-p) was used,
-	 but that conflicts with Posix.  */
-      outfile = stringappend(name_base, short_base_length, ".output");
-#endif
-      foutput = tryopen(outfile, "w");
-    }
+      base_name = XMALLOC (char,
+			   strlen (short_base_name) + strlen (EXT_TAB) + 1);
+      stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
 
-  if (noparserflag)
-    {
-      /* use permanent name for actions file */
-      actfile = stringappend(name_base, short_base_length, ".act");
-      faction = tryopen(actfile, "w");
+      return;
     }
 
-#ifdef MSDOS
-  if (! noparserflag)
-    actfile = mktemp(stringappend(tmp_base, tmp_len, "acXXXXXX"));
-  tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "atXXXXXX"));
-  tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "taXXXXXX"));
-  tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "deXXXXXX"));
-#else
-  if (! noparserflag)
-    actfile = mktemp(stringappend(tmp_base, tmp_len, "act.XXXXXX"));
-  tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "attrs.XXXXXX"));
-  tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "tab.XXXXXX"));
-  tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "defs.XXXXXX"));
-#endif /* not MSDOS */
-
-  if (! noparserflag)
-    faction = tryopen(actfile, "w+");
-  fattrs = tryopen(tmpattrsfile,"w+");
-  ftable = tryopen(tmptabfile, "w+");
-
-  if (definesflag)
-    {
-      defsfile = stringappend(name_base, base_length, ".h");
-      fdefines = tryopen(tmpdefsfile, "w+");
-    }
+  /* If neither -o nor --file-prefix were specified, and the input
+     file is foo.y, BASE_NAME is `foo.tab', and SHORT_BASE_NAME is
+     `foo'.
 
-#if !(defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
-  if (! noparserflag)
-    unlink(actfile);
-  unlink(tmpattrsfile);
-  unlink(tmptabfile);
-  unlink(tmpdefsfile);
-#endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
+     If --yacc is used, do as if the input file was `y.y'.  */
+  {
+    const char *name_base = yacc_flag ? "y.y" : infile;
 
-	/* These are opened by `done' or `open_extra_files', if at all */
-  if (spec_outfile)
-    tabfile = spec_outfile;
-  else
-    tabfile = stringappend(name_base, base_length, ".c");
+    /* BASE_LENGTH gets length of BASE_NAME, sans ".y" suffix if any.  */
 
-#ifdef VMS
-  attrsfile = stringappend(name_base, short_base_length, "_stype.h");
-  guardfile = stringappend(name_base, short_base_length, "_guard.c");
-#else
-#ifdef MSDOS
-  attrsfile = stringappend(name_base, short_base_length, ".sth");
-  guardfile = stringappend(name_base, short_base_length, ".guc");
-#else
-  attrsfile = stringappend(name_base, short_base_length, ".stype.h");
-  guardfile = stringappend(name_base, short_base_length, ".guard.c");
-#endif /* not MSDOS */
-#endif /* not VMS */
-}
+    base_length = strlen (name_base);
+    if (strsuffix (name_base, ".y"))
+      base_length -= 2;
+    short_base_length = base_length;
+    short_base_name = strndup (name_base, short_base_length);
 
+    base_name = XMALLOC (char,
+			 strlen (short_base_name) + strlen (EXT_TAB) + 1);
+    stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
 
+    return;
+  }
+}
 
-/* open the output files needed only for the semantic parser.
-This is done when %semantic_parser is seen in the declarations section.  */
+/*-----------------------------------------------------------------.
+| Open the input file.  Look for the skeletons.  Find the names of |
+| the output files.  Prepare the obstacks.                         |
+`-----------------------------------------------------------------*/
 
 void
-open_extra_files (void)
+open_files (void)
 {
-  FILE *ftmp;
-  int c;
-  char *filename;
-#ifdef MSDOS
-  char *cp;
-#endif
-
-  tryclose(fparser);
+  compute_base_names ();
 
-  if (! noparserflag)
-    {
-      filename = (char *) getenv ("BISON_HAIRY");
-#ifdef MSDOS
-      /* File doesn't exist in current directory; try in INIT directory.  */
-      cp = getenv("INIT");
-      if (filename == 0 && cp != NULL)
-        {
-          filename = xmalloc(strlen(cp) + strlen(PFILE1) + 2);
-          strcpy(filename, cp);
-          cp = filename + strlen(filename);
-          *cp++ = '/';
-          strcpy(cp, PFILE1);
-        }
-#endif
-      fparser= tryopen(filename ? filename : PFILE1, "r");
-    }
+  finput = xfopen (infile, "r");
 
-		/* JF change from inline attrs file to separate one */
-  ftmp = tryopen(attrsfile, "w");
-  rewind(fattrs);
-  while((c=getc(fattrs))!=EOF)	/* Thank god for buffering */
-    putc(c,ftmp);
-  tryclose(fattrs);
-  fattrs=ftmp;
+  if (verbose_flag)
+    /* We used to use just .out if spec_name_prefix (-p) was used, but
+       that conflicts with Posix.  */
+    foutput = xfopen (stringappend (base_name, EXT_OUTPUT), "w");
 
-  fguard = tryopen(guardfile, "w");
+  attrsfile = stringappend (short_base_name, EXT_STYPE_H);
+  guardfile = stringappend (short_base_name, EXT_GUARD_C);
 
+  /* Initialize the obstacks. */
+  obstack_init (&action_obstack);
+  obstack_init (&attrs_obstack);
+  obstack_init (&table_obstack);
+  obstack_init (&defines_obstack);
 }
 
+
+
+/*-----------------------------------------------------.
+| Close the open files, produce all the output files.  |
+`-----------------------------------------------------*/
+
 void
-done (void)
+output_files (void)
 {
-  tryclose(faction);
-  tryclose(fattrs);
-  tryclose(fguard);
-  tryclose(finput);
-  tryclose(fparser);
-  tryclose(foutput);
-
-  /* JF write out the output file */
-  if (!complain_message_count && ftable)
-    {
-      FILE *ftmp;
-      register int c;
-
-      ftmp=tryopen(tabfile, "w");
-      rewind(ftable);
-      while((c=getc(ftable)) != EOF)
-        putc(c,ftmp);
-      tryclose(ftmp);
-      tryclose(ftable);
-
-      if (definesflag)
-        {
-          ftmp = tryopen(defsfile, "w");
-          fflush(fdefines);
-          rewind(fdefines);
-          while((c=getc(fdefines)) != EOF)
-            putc(c,ftmp);
-          tryclose(ftmp);
-          tryclose(fdefines);
-        }
-    }
+  xfclose (fguard);
+  xfclose (finput);
+  xfclose (foutput);
+
+  /* Output the main file.  */
+  if (spec_outfile)
+    obstack_save (&table_obstack, spec_outfile);
+  else
+    obstack_save (&table_obstack,  stringappend (base_name, ".c"));
+
+  /* Output the header file if wanted. */
+  if (defines_flag)
+    obstack_save (&defines_obstack, stringappend (base_name, ".h"));
+
+  /* If we output only the table, dump the actions in ACTFILE. */
+  if (no_parser_flag)
+    obstack_save (&action_obstack, stringappend (short_base_name, ".act"));
 
-#if defined (VMS) & !defined (__VMS_POSIX)
-  if (faction && ! noparserflag)
-    delete(actfile);
-  if (fattrs)
-    delete(tmpattrsfile);
-  if (ftable)
-    delete(tmptabfile);
-/* Don't call exit again, we're in atexit ().
-  if (!complain_message_count)
-    sys$exit(SS$_NORMAL);
-  sys$exit(SS$_ABORT); */
-#else
-#if (defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
-  if (actfile && ! noparserflag) unlink(actfile);
-  if (tmpattrsfile) unlink(tmpattrsfile);
-  if (tmptabfile) unlink(tmptabfile);
-  if (tmpdefsfile) unlink(tmpdefsfile);
-#endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
-/* Don't call exit again, we're in atexit ().
-  exit (complain_message_count ? 1 : 0); */
-#endif /* not VMS, or __VMS_POSIX */
+  /* If we produced a semantic parser ATTRS_OBSTACK must be dumped
+     into its own file, ATTTRSFILE.  */
+  if (semantic_parser)
+    obstack_save (&attrs_obstack, attrsfile);
 }