X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d33cb3ae09c2bed6df2ef950f5aa14ceba428d8b..63951be29fcb8e21146a9377176d53d509c575ca:/src/files.c?ds=sidebyside

diff --git a/src/files.c b/src/files.c
index dd3ec818..f698c7e9 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1,39 +1,38 @@
-/* Open and close files for bison,
-   Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
-   Free Software Foundation, Inc.
+/* Open and close files for Bison.
+
+   Copyright (C) 1984, 1986, 1989, 1992, 2000-2012 Free Software
+   Foundation, Inc.
 
    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.
+   This program 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 3 of the License, 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.
+   This program 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.  */
-
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include <config.h>
 #include "system.h"
-#include "getargs.h"
-#include "files.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 (char const *name);
 
-FILE *finput = NULL;
+#include <error.h>
+#include <dirname.h>
+#include <get-errno.h>
+#include <quote.h>
+#include <quotearg.h>
+#include <stdio-safer.h>
+#include <xstrndup.h>
 
-struct obstack pre_prologue_obstack;
-struct obstack post_prologue_obstack;
+#include "complain.h"
+#include "files.h"
+#include "getargs.h"
+#include "gram.h"
 
 /* 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
@@ -42,60 +41,60 @@ struct obstack post_prologue_obstack;
    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 const *spec_outfile = NULL;       /* for -o. */
+char const *spec_file_prefix = NULL;   /* for -b. */
+char const *spec_name_prefix = NULL;   /* for -p. */
+char *spec_verbose_file = NULL;  /* for --verbose. */
+char *spec_graph_file = NULL;    /* for -g. */
+char *spec_xml_file = NULL;      /* for -x. */
+char *spec_defines_file = NULL;  /* for --defines. */
+char *parser_file_name;
 
-char *infile = NULL;
+/* All computed output file names.  */
+static char **file_names = NULL;
+static int file_names_count = 0;
 
-static char *full_base_name = NULL;
+uniqstr grammar_file = NULL;
+uniqstr current_file = NULL;
 
-/* Prefix used to generate output file names.  */
-char *short_base_name = NULL;
+/* If --output=dir/foo.c was specified,
+   DIR_PREFIX is `dir/' and ALL_BUT_EXT and ALL_BUT_TAB_EXT are `dir/foo'.
 
-/* Infix used to generate output file names (i.e., `.tab', or `_tab',
-   or `').  */
-char *output_infix = NULL;
+   If --output=dir/foo.tab.c was specified, DIR_PREFIX is `dir/',
+   ALL_BUT_EXT is `dir/foo.tab', and ALL_BUT_TAB_EXT is `dir/foo'.
 
-/* 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;
-
+   If --output was not specified but --file-prefix=dir/foo was specified,
+   ALL_BUT_EXT = `foo.tab' and ALL_BUT_TAB_EXT = `foo'.
 
-/*--------------------------.
-| Is SUFFIX ending STRING?  |
-`--------------------------*/
+   If neither --output nor --file was specified but the input grammar
+   is name dir/foo.y, ALL_BUT_EXT and ALL_BUT_TAB_EXT are `foo'.
 
-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;
-}
+   If neither --output nor --file was specified, DIR_PREFIX is the
+   empty string (meaning the current directory); otherwise it is
+   `dir/'.  */
 
+char *all_but_ext;
+static char *all_but_tab_ext;
+char *dir_prefix;
 
+/* C source file extension (the parser source).  */
+static char *src_extension = NULL;
+/* Header file extension (if option ``-d'' is specified).  */
+static char *header_extension = NULL;
+
 /*-----------------------------------------------------------------.
 | Return a newly allocated string composed of the concatenation of |
-| STRING1, and STRING2.                                            |
+| STR1, and STR2.                                                  |
 `-----------------------------------------------------------------*/
 
-char*
-stringappend (const char *string1, const char *string2)
+static char *
+concat2 (char const *str1, char const *str2)
 {
-  size_t len = strlen (string1) + strlen (string2);
-  char *res = XMALLOC (char, len + 1);
+  size_t len = strlen (str1) + strlen (str2);
+  char *res = xmalloc (len + 1);
   char *cp;
-  cp = stpcpy (res, string1);
-  cp = stpcpy (cp, string2);
+  cp = stpcpy (res, str1);
+  cp = stpcpy (cp, str2);
   return res;
 }
 
@@ -109,9 +108,10 @@ xfopen (const char *name, const char *mode)
 {
   FILE *ptr;
 
-  ptr = fopen (name, mode);
+  ptr = fopen_safer (name, mode);
   if (!ptr)
-    error (2, errno, _("cannot open file `%s'"), name);
+    error (EXIT_FAILURE, get_errno (),
+           _("%s: cannot open"), quotearg_colon (name));
 
   return ptr;
 }
@@ -120,56 +120,45 @@ xfopen (const char *name, const char *mode)
 | Try to close file PTR, and print an error message if fails.  |
 `-------------------------------------------------------------*/
 
-int
+void
 xfclose (FILE *ptr)
 {
-  int result;
-
   if (ptr == NULL)
-    return 0;
+    return;
 
-  result = fclose (ptr);
-  if (result == EOF)
-    error (2, errno, _("cannot close file"));
+  if (ferror (ptr))
+    error (EXIT_FAILURE, 0, _("input/output error"));
 
-  return result;
+  if (fclose (ptr) != 0)
+    error (EXIT_FAILURE, get_errno (), _("cannot close file"));
 }
 
 
-/*----------------------------------------------------------------.
-| 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 *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);
-}
+/*------------------------------------------------------------------.
+| Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. |
+`------------------------------------------------------------------*/
 
-/* Computes extensions from the grammar file extension. */
+/* Compute 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');
+  if (strcmp (ext, ".y") == 0)
+    {
+      src_extension = xstrdup (language->src_extension);
+      header_extension = xstrdup (language->header_extension);
+    }
+  else
+    {
+      src_extension = xstrdup (ext);
+      header_extension = xstrdup (ext);
+      tr (src_extension, 'y', 'c');
+      tr (src_extension, 'Y', 'C');
+      tr (header_extension, 'y', 'h');
+      tr (header_extension, 'Y', 'H');
+    }
 }
 
-/* Computes extensions from the given c source file extension. */
+/* Compute extensions from the given c source file extension.  */
 static void
 compute_exts_from_src (const char *ext)
 {
@@ -177,13 +166,14 @@ compute_exts_from_src (const char *ext)
      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');
+  header_extension = xstrdup (ext);
+  tr (header_extension, 'c', 'h');
+  tr (header_extension, 'C', 'H');
 }
 
 
-/* Decompose FILENAME in four parts: *BASE, *TAB, and *EXT, the fourth
-   part, (the directory) is ranging from FILENAME to the char before
+/* Decompose FILE_NAME in four parts: *BASE, *TAB, and *EXT, the fourth
+   part, (the directory) is ranging from FILE_NAME to the char before
    *BASE, so we don't need an additional parameter.
 
    *EXT points to the last period in the basename, or NULL if none.
@@ -192,7 +182,7 @@ compute_exts_from_src (const char *ext)
    `.tab' or `_tab' if present right before *EXT, or is NULL. *TAB
    cannot be equal to *BASE.
 
-   None are allocated, they are simply pointers to parts of FILENAME.
+   None are allocated, they are simply pointers to parts of FILE_NAME.
    Examples:
 
    '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT =
@@ -211,130 +201,196 @@ compute_exts_from_src (const char *ext)
    'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL.  */
 
 static void
-filename_split (const char *filename,
-		const char **base, const char **tab, const char **ext)
+file_name_split (const char *file_name,
+		 const char **base, const char **tab, const char **ext)
 {
-  *base = base_name (filename);
+  *base = last_component (file_name);
 
   /* Look for the extension, i.e., look for the last dot. */
-  *ext = strrchr (*base, '.');
+  *ext = mbsrchr (*base, '.');
   *tab = NULL;
 
-  /* If there is an exentension, check if there is a `.tab' part right
+  /* If there is an extension, 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");
+  if (*ext)
+    {
+      size_t baselen = *ext - *base;
+      size_t dottablen = 4;
+      if (dottablen < baselen
+	  && (strncmp (*ext - dottablen, ".tab", dottablen) == 0
+	      || strncmp (*ext - dottablen, "_tab", dottablen) == 0))
+	*tab = *ext - dottablen;
+    }
 }
 
 
-/* FIXME: Should use xstrndup. */
-
 static void
-compute_base_names (void)
+compute_file_name_parts (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'.
+  /* Compute ALL_BUT_EXT and ALL_BUT_TAB_EXT from SPEC_OUTFILE
+     or GRAMMAR_FILE.
 
      The precise -o name will be used for FTABLE.  For other output
      files, remove the ".c" or ".tab.c" suffix.  */
   if (spec_outfile)
     {
-      filename_split (spec_outfile, &base, &tab, &ext);
+      file_name_split (spec_outfile, &base, &tab, &ext);
+      dir_prefix = xstrndup (spec_outfile, base - spec_outfile);
 
-      /* The full base name goes up the EXT, excluding it. */
-      full_base_name =
+      /* ALL_BUT_EXT goes up the EXT, excluding it. */
+      all_but_ext =
 	xstrndup (spec_outfile,
 		  (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));
 
-      /* The short base name goes up to TAB, excluding it.  */
-      short_base_name =
+      /* ALL_BUT_TAB_EXT goes up to TAB, excluding it.  */
+      all_but_tab_ext =
 	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
     {
+      file_name_split (grammar_file, &base, &tab, &ext);
+
       if (spec_file_prefix)
 	{
-	  /* If --file-prefix=foo was specified, SHORT_BASE_NAME =
-	     `foo'.  */
-	  short_base_name = xstrdup (spec_file_prefix);
+	  /* If --file-prefix=foo was specified, ALL_BUT_TAB_EXT = `foo'.  */
+	  dir_prefix =
+            xstrndup (spec_file_prefix,
+                      last_component (spec_file_prefix) - spec_file_prefix);
+	  all_but_tab_ext = xstrdup (spec_file_prefix);
 	}
       else if (yacc_flag)
 	{
-	  /* If --yacc, then the output is `y.tab.c'. */
-	  short_base_name = xstrdup ("y");
+	  /* If --yacc, then the output is `y.tab.c'.  */
+	  dir_prefix = xstrdup ("");
+	  all_but_tab_ext = xstrdup ("y");
 	}
       else
 	{
-	  /* Otherwise, the short base name is computed from the input
+	  /* Otherwise, ALL_BUT_TAB_EXT 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)));
+	  dir_prefix = xstrdup ("");
+	  all_but_tab_ext =
+	    xstrndup (base, (strlen (base) - (ext ? strlen (ext) : 0)));
 	}
 
-      /* In these cases, always append `.tab'. */
-      output_infix = xstrdup (EXT_TAB);
-
-      full_base_name = XMALLOC (char,
-				strlen (short_base_name)
-				+ strlen (EXT_TAB) + 1);
-      stpcpy (stpcpy (full_base_name, short_base_name), EXT_TAB);
+      if (language->add_tab)
+        all_but_ext = concat2 (all_but_tab_ext, TAB_EXT);
+      else
+        all_but_ext = xstrdup (all_but_tab_ext);
 
-      /* Computes the extensions from the grammar file name.  */
-      filename_split (infile, &base, &tab, &ext);
+      /* Compute the extensions from the grammar file name.  */
       if (ext && !yacc_flag)
 	compute_exts_from_gf (ext);
     }
 }
 
-/*-------------------------------------------------------.
-| Close the open files, compute the output files names.  |
-`-------------------------------------------------------*/
+
+/* Compute the output file names.  Warn if we detect conflicting
+   outputs to the same file.  */
 
 void
 compute_output_file_names (void)
 {
-  compute_base_names ();
+  compute_file_name_parts ();
 
   /* If not yet done. */
   if (!src_extension)
-    src_extension = ".c";
+    src_extension = xstrdup (".c");
   if (!header_extension)
-    header_extension = ".h";
+    header_extension = xstrdup (".h");
 
   parser_file_name =
-    spec_outfile ? spec_outfile : stringappend (full_base_name, src_extension);
+    (spec_outfile
+     ? xstrdup (spec_outfile)
+     : concat2 (all_but_ext, src_extension));
+
+  if (defines_flag)
+    {
+      if (! spec_defines_file)
+	spec_defines_file = concat2 (all_but_ext, header_extension);
+    }
 
-  /* It the defines filename if not given, we create it.  */
-  if (!spec_defines_file)
-    spec_defines_file = stringappend (full_base_name, header_extension);
+  if (graph_flag)
+    {
+      if (! spec_graph_file)
+	spec_graph_file = concat2 (all_but_tab_ext, ".dot");
+      output_file_name_check (&spec_graph_file);
+    }
 
-  /* It the graph filename if not given, we create it.  */
-  if (!spec_graph_file)
-    spec_graph_file = stringappend (short_base_name, ".vcg");
+  if (xml_flag)
+    {
+      if (! spec_xml_file)
+	spec_xml_file = concat2 (all_but_tab_ext, ".xml");
+      output_file_name_check (&spec_xml_file);
+    }
 
-  spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT);
+  if (report_flag)
+    {
+      if (!spec_verbose_file)
+        spec_verbose_file = concat2 (all_but_tab_ext, OUTPUT_EXT);
+      output_file_name_check (&spec_verbose_file);
+    }
+
+  free (all_but_tab_ext);
+  free (src_extension);
+  free (header_extension);
+}
+
+void
+output_file_name_check (char **file_name)
+{
+  bool conflict = false;
+  if (0 == strcmp (*file_name, grammar_file))
+    {
+      complain (_("refusing to overwrite the input file %s"),
+                quote (*file_name));
+      conflict = true;
+    }
+  else
+    {
+      int i;
+      for (i = 0; i < file_names_count; i++)
+        if (0 == strcmp (file_names[i], *file_name))
+          {
+            warn (_("conflicting outputs to file %s"),
+                  quote (*file_name));
+            conflict = true;
+          }
+    }
+  if (conflict)
+    {
+      free (*file_name);
+      *file_name = strdup ("/dev/null");
+    }
+  else
+    {
+      file_names = xnrealloc (file_names, ++file_names_count,
+                              sizeof *file_names);
+      file_names[file_names_count-1] = xstrdup (*file_name);
+    }
+}
+
+void
+output_file_names_free (void)
+{
+  free (all_but_ext);
+  free (spec_verbose_file);
+  free (spec_graph_file);
+  free (spec_xml_file);
+  free (spec_defines_file);
+  free (parser_file_name);
+  free (dir_prefix);
+  {
+    int i;
+    for (i = 0; i < file_names_count; i++)
+      free (file_names[i]);
+  }
+  free (file_names);
 }