X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1916f98ef86a1b73986f3f0ab709cccc4afb8f9e..c0cac722f7e5d7498528a67a37477cdf9ed1745c:/src/files.c

diff --git a/src/files.c b/src/files.c
index 1d23b887..c4c223d3 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1,5 +1,6 @@
 /* Open and close files for bison,
-   Copyright (C) 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
+   Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -20,88 +21,82 @@
 
 
 #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 "getargs.h"
 #include "files.h"
-#include "xalloc.h"
 #include "gram.h"
+#include "error.h"
 #include "complain.h"
 
+/* From basename.c.  Almost a lie, as it returns a char *. */
+const char *base_name PARAMS ((char const *name));
+
 FILE *finput = NULL;
-FILE *foutput = NULL;
-FILE *fdefines = NULL;
-FILE *ftable = NULL;
-FILE *fattrs = NULL;
-FILE *fguard = NULL;
-FILE *faction = NULL;
-FILE *fparser = NULL;
-
-/* File name specified with -o for the output file, or 0 if no -o.  */
-char *spec_outfile;
-
-char *infile;
-char *attrsfile;
-
-static char *outfile;
-static char *defsfile;
-static char *tabfile;
-static char *guardfile;
-static char *actfile;
-static char *tmpattrsfile;
-static char *tmptabfile;
-static char *tmpdefsfile;
-
-extern char *mktemp ();		/* So the compiler won't complain */
-extern char *getenv ();
-
-extern char *program_name;
-
 
-static char *
-stringappend (const char *string1, int end1, const char *string2)
-{
-  register char *ostring;
-  register char *cp;
-  register const char *cp1;
-  register int i;
+struct obstack pre_prologue_obstack;
+struct obstack post_prologue_obstack;
+
+/* Initializing some values below (such SPEC_NAME_PREFIX to `yy') is
+   tempting, but don't do that: for the time being our handling of the
+   %directive vs --option leaves precedence to the options by deciding
+   that if a %directive sets a variable which is really set (i.e., not
+   NULL), then the %directive is ignored.  As a result, %name-prefix,
+   for instance, will not be honored.  */
+
+char *spec_outfile = NULL;	/* for -o. */
+char *spec_file_prefix = NULL;	/* for -b. */
+const char *spec_name_prefix = NULL;	/* for -p. */
+char *spec_verbose_file = NULL;   /* for --verbose. */
+char *spec_graph_file = NULL;   /* for -g. */
+char *spec_defines_file = NULL; /* for --defines. */
+char *parser_file_name = NULL;
+
+char *infile = NULL;
+
+static char *full_base_name = NULL;
+
+/* Prefix used to generate output file names.  */
+char *short_base_name = NULL;
 
-  cp1 = string2;
-  i = 0;
-  while (*cp1++)
-    i++;
+/* Infix used to generate output file names (i.e., `.tab', or `_tab',
+   or `').  */
+char *output_infix = NULL;
 
-  ostring = XCALLOC (char, i + end1 + 1);
+/* C source file extension (the parser source).  */
+const char *src_extension = NULL;
+/* Header file extension (if option ``-d'' is specified).  */
+const char *header_extension = NULL;
+
+
+/*--------------------------.
+| Is SUFFIX ending STRING?  |
+`--------------------------*/
 
-  cp = ostring;
-  cp1 = string1;
-  for (i = 0; i < end1; i++)
-    *cp++ = *cp1++;
+int
+strsuffix (const char *string, const char *suffix)
+{
+  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;
+}
 
-  cp1 = string2;
-  while ((*cp++ = *cp1++))
-    ;
 
-  return ostring;
+/*-----------------------------------------------------------------.
+| Return a newly allocated string composed of the concatenation of |
+| STRING1, and STRING2.                                            |
+`-----------------------------------------------------------------*/
+
+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;
 }
 
 /*-----------------------------------------------------------------.
@@ -109,7 +104,7 @@ stringappend (const char *string1, int end1, const char *string2)
 | if fails.                                                        |
 `-----------------------------------------------------------------*/
 
-static FILE *
+FILE *
 xfopen (const char *name, const char *mode)
 {
   FILE *ptr;
@@ -125,7 +120,7 @@ xfopen (const char *name, const char *mode)
 | Try to close file PTR, and print an error message if fails.  |
 `-------------------------------------------------------------*/
 
-static int
+int
 xfclose (FILE *ptr)
 {
   int result;
@@ -140,318 +135,206 @@ xfclose (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
-open_files (void)
+
+/*----------------------------------------------------------------.
+| Compute BASE_NAME, SHORT_BASE_NAME and output files extensions. |
+`----------------------------------------------------------------*/
+
+/* Replace all characters FROM by TO in the string IN.
+   and returns a new allocated string.  */
+static char *
+tr (const char *in, char from, char to)
 {
-  char *name_base;
-#ifdef MSDOS
-  register char *cp;
-#endif
-  char *filename;
-  int base_length;
-  int short_base_length;
-
-#if defined (VMS) & !defined (__VMS_POSIX)
-  const char *tmp_base = "sys$scratch:b_";
-#else
-  const char *tmp_base = "/tmp/b.";
-#endif
-  int tmp_len;
-
-#ifdef MSDOS
-  tmp_base = getenv ("TMP");
-  if (tmp_base == 0)
-    tmp_base = "";
-  strlwr (infile);
-#endif /* MSDOS */
-
-#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__ */
-
-#if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__))
-  {
-    char *tmp_ptr = getenv ("TMPDIR");
-
-    if (tmp_ptr != 0)
-      tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b.");
-  }
-#endif /* unix || __unix || __unix__ */
-
-  tmp_len = strlen (tmp_base);
+  char *temp;
+  char *out;
+
+  out = XMALLOC (char, strlen (in) + 1);
+
+  for (temp = out; *in; in++, out++)
+    if (*in == from)
+      *out = to;
+    else
+      *out = *in;
+  *out = 0;
+  return (temp);
+}
 
-  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);
-#endif /* MSDOS */
-      /* BASE_LENGTH includes ".tab" but not ".c".  */
-      base_length = strlen (name_base);
-      if (!strcmp (name_base + base_length - 2, ".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))
-	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 = XMALLOC (char, 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.  */
-
-      static char FIXED_NAME_BASE[] = "y.y";
-
-      name_base = yaccflag ? FIXED_NAME_BASE : infile;
-
-      /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
-
-      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;
-    }
+/* Computes extensions from the grammar file extension. */
+static void
+compute_exts_from_gf (const char *ext)
+{
+  src_extension = tr (ext, 'y', 'c');
+  src_extension = tr (src_extension, 'Y', 'C');
+  header_extension = tr (ext, 'y', 'h');
+  header_extension = tr (header_extension, 'Y', 'H');
+}
 
-  finput = xfopen (infile, "r");
+/* Computes extensions from the given c source file extension. */
+static void
+compute_exts_from_src (const char *ext)
+{
+  /* We use this function when the user specifies `-o' or `--output',
+     so the extenions must be computed unconditionally from the file name
+     given by this option.  */
+  src_extension = xstrdup (ext);
+  header_extension = tr (ext, 'c', 'h');
+  header_extension = tr (header_extension, 'C', 'H');
+}
 
-  if (!noparserflag)
-    {
-      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 (char, strlen (cp) + strlen (PFILE) + 2);
-	  strcpy (filename, cp);
-	  cp = filename + strlen (filename);
-	  *cp++ = '/';
-	  strcpy (cp, PFILE);
-	}
-#endif /* MSDOS */
-      fparser = xfopen (filename ? filename : PFILE, "r");
-    }
 
-  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 = xfopen (outfile, "w");
-    }
+/* Decompose FILENAME in four parts: *BASE, *TAB, and *EXT, the fourth
+   part, (the directory) is ranging from FILENAME to the char before
+   *BASE, so we don't need an additional parameter.
 
-  if (noparserflag)
-    {
-      /* use permanent name for actions file */
-      actfile = stringappend (name_base, short_base_length, ".act");
-      faction = xfopen (actfile, "w");
-    }
+   *EXT points to the last period in the basename, or NULL if none.
 
-#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 = xfopen (actfile, "w+");
-  fattrs = xfopen (tmpattrsfile, "w+");
-  ftable = xfopen (tmptabfile, "w+");
-
-  if (definesflag)
-    {
-      defsfile = stringappend (name_base, base_length, ".h");
-      fdefines = xfopen (tmpdefsfile, "w+");
-    }
+   If there is no *EXT, *TAB is NULL.  Otherwise, *TAB points to
+   `.tab' or `_tab' if present right before *EXT, or is NULL. *TAB
+   cannot be equal to *BASE.
 
-#if !(defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
-  if (!noparserflag)
-    unlink (actfile);
-  unlink (tmpattrsfile);
-  unlink (tmptabfile);
-  unlink (tmpdefsfile);
-#endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
+   None are allocated, they are simply pointers to parts of FILENAME.
+   Examples:
 
-  /* 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");
-
-#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 */
-}
+   '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT =
+   '.c'
 
+   'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c'
 
+   'tab.c' -> *BASE = 'tab.c', *TAB = NULL, *EXT = '.c'
 
-/*--------------------------------------------------------------------.
-| Open the output files needed only for the semantic parser.  This    |
-| is done when %semantic_parser is seen in the declarations section.  |
-`--------------------------------------------------------------------*/
+   '.tab.c' -> *BASE = '.tab.c', *TAB = NULL, *EXT = '.c'
 
-void
-open_extra_files (void)
+   'foo.tab' -> *BASE = 'foo.tab', *TAB = NULL, *EXT = '.tab'
+
+   'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL
+
+   'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL.  */
+
+static void
+filename_split (const char *filename,
+		const char **base, const char **tab, const char **ext)
 {
-  FILE *ftmp;
-  int c;
-  char *filename;
-#ifdef MSDOS
-  char *cp;
-#endif
+  *base = base_name (filename);
+
+  /* Look for the extension, i.e., look for the last dot. */
+  *ext = strrchr (*base, '.');
+  *tab = NULL;
+
+  /* If there is an exentension, check if there is a `.tab' part right
+     before.  */
+  if (*ext
+      && (*ext - *base) > (int) strlen (".tab")
+      && (!strncmp (*ext - strlen (".tab"), ".tab", strlen (".tab"))
+	  || !strncmp (*ext - strlen ("_tab"), "_tab", strlen ("_tab"))))
+    *tab = *ext - strlen (".tab");
+}
+
 
-  xfclose (fparser);
+/* FIXME: Should use xstrndup. */
 
-  if (!noparserflag)
+static void
+compute_base_names (void)
+{
+  const char *base, *tab, *ext;
+
+  /* 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)
     {
-      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_split (spec_outfile, &base, &tab, &ext);
+
+      /* The full base name goes up the EXT, excluding it. */
+      full_base_name =
+	xstrndup (spec_outfile,
+		  (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));
+
+      /* The short base name goes up to TAB, excluding it.  */
+      short_base_name =
+	xstrndup (spec_outfile,
+		  (strlen (spec_outfile)
+		   - (tab ? strlen (tab) : (ext ? strlen (ext) : 0))));
+
+      if (tab)
+	output_infix = xstrndup (tab,
+				 (strlen (tab) - (ext ? strlen (ext) : 0)));
+
+      if (ext)
+	compute_exts_from_src (ext);
+    }
+
+  /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab'
+     and SHORT_BASE_NAME = `foo'.
+
+     Construct names from it.  */
+  else
+    {
+      if (spec_file_prefix)
 	{
-	  filename = XMALLOC (char, strlen (cp) + strlen (PFILE1) + 2);
-	  strcpy (filename, cp);
-	  cp = filename + strlen (filename);
-	  *cp++ = '/';
-	  strcpy (cp, PFILE1);
+	  /* If --file-prefix=foo was specified, SHORT_BASE_NAME =
+	     `foo'.  */
+	  short_base_name = xstrdup (spec_file_prefix);
+	}
+      else if (yacc_flag)
+	{
+	  /* If --yacc, then the output is `y.tab.c'. */
+	  short_base_name = xstrdup ("y");
+	}
+      else
+	{
+	  /* Otherwise, the short base name is computed from the input
+	     grammar: `foo/bar.yy' => `bar'.  */
+	  filename_split (infile, &base, &tab, &ext);
+	  short_base_name =
+	    xstrndup (base,
+		      (strlen (base) - (ext ? strlen (ext) : 0)));
 	}
-#endif
-      fparser = xfopen (filename ? filename : PFILE1, "r");
-    }
 
-  /* JF change from inline attrs file to separate one */
-  ftmp = xfopen (attrsfile, "w");
-  rewind (fattrs);
-  while ((c = getc (fattrs)) != EOF)	/* Thank god for buffering */
-    putc (c, ftmp);
-  xfclose (fattrs);
-  fattrs = ftmp;
+      /* In these cases, always append `.tab'. */
+      output_infix = xstrdup (EXT_TAB);
 
-  fguard = xfopen (guardfile, "w");
+      full_base_name = XMALLOC (char,
+				strlen (short_base_name)
+				+ strlen (EXT_TAB) + 1);
+      stpcpy (stpcpy (full_base_name, short_base_name), EXT_TAB);
 
+      /* Computes the extensions from the grammar file name.  */
+      filename_split (infile, &base, &tab, &ext);
+      if (ext && !yacc_flag)
+	compute_exts_from_gf (ext);
+    }
 }
 
+/*-------------------------------------------------------.
+| Close the open files, compute the output files names.  |
+`-------------------------------------------------------*/
+
 void
-done (void)
+compute_output_file_names (void)
 {
-  xfclose (faction);
-  xfclose (fattrs);
-  xfclose (fguard);
-  xfclose (finput);
-  xfclose (fparser);
-  xfclose (foutput);
-
-  /* JF write out the output file */
-  if (!complain_message_count && ftable)
-    {
-      FILE *ftmp;
-      register int c;
+  compute_base_names ();
 
-      ftmp = xfopen (tabfile, "w");
-      rewind (ftable);
-      while ((c = getc (ftable)) != EOF)
-	putc (c, ftmp);
-      xfclose (ftmp);
-      xfclose (ftable);
+  /* If not yet done. */
+  if (!src_extension)
+    src_extension = ".c";
+  if (!header_extension)
+    header_extension = ".h";
 
-      if (definesflag)
-	{
-	  ftmp = xfopen (defsfile, "w");
-	  fflush (fdefines);
-	  rewind (fdefines);
-	  while ((c = getc (fdefines)) != EOF)
-	    putc (c, ftmp);
-	  xfclose (ftmp);
-	  xfclose (fdefines);
-	}
-    }
+  parser_file_name =
+    spec_outfile ? spec_outfile : stringappend (full_base_name, src_extension);
+
+  /* It the defines filename if not given, we create it.  */
+  if (!spec_defines_file)
+    spec_defines_file = stringappend (full_base_name, header_extension);
+
+  /* It the graph filename if not given, we create it.  */
+  if (!spec_graph_file)
+    spec_graph_file = stringappend (short_base_name, ".vcg");
 
-#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 */
+  spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT);
 }