gnulib: update

[bison.git] / src / files.c

diff --git a/src/files.c b/src/files.c
index c6aca4534804f5589468cb4a74b683a7e504add6..3c913b6bfc6ff298c216fe7804b9a3f4fa62d71f 100644 (file)
--- a/src/files.c
+++ b/src/files.c
@@ -1,7 +1,7 @@
 /* Open and close files for Bison.
 
 /* Open and close files for Bison.
 

-   Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
-   2005, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1986, 1989, 1992, 2000-2015 Free Software
+   Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -25,6 +25,7 @@
 #include <dirname.h>
 #include <get-errno.h>
 #include <quote.h>
 #include <dirname.h>
 #include <get-errno.h>
 #include <quote.h>

+#include <quotearg.h>

 #include <stdio-safer.h>
 #include <xstrndup.h>
 
 #include <stdio-safer.h>
 #include <xstrndup.h>
 


@@ -33,7 +34,7 @@
 #include "getargs.h"
 #include "gram.h"
 
 #include "getargs.h"
 #include "gram.h"
 

-/* Initializing some values below (such SPEC_NAME_PREFIX to `yy') is
+/* 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
    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


@@ -50,27 +51,36 @@ char *spec_defines_file = NULL;  /* for --defines. */
 char *parser_file_name;
 
 /* All computed output file names.  */
 char *parser_file_name;
 
 /* All computed output file names.  */

-static char **file_names = NULL;
-static int file_names_count = 0;
+typedef struct generated_file
+{
+  /** File name.  */
+  char *name;
+  /** Whether is a generated source file (e.g., *.c, *.java...), as
+      opposed to the report file (e.g., *.output).  When late errors
+      are detected, generated source files are removed.  */
+  bool is_source;
+} generated_file;
+static generated_file *generated_files = NULL;
+static int generated_files_size = 0;

 
 uniqstr grammar_file = NULL;
 uniqstr current_file = NULL;
 
 /* If --output=dir/foo.c was specified,
 
 uniqstr grammar_file = NULL;
 uniqstr current_file = NULL;
 
 /* If --output=dir/foo.c was specified,

-   DIR_PREFIX is `dir/' and ALL_BUT_EXT and ALL_BUT_TAB_EXT are `dir/foo'.
+   DIR_PREFIX is 'dir/' and ALL_BUT_EXT and ALL_BUT_TAB_EXT are 'dir/foo'.

 
 

-   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'.
+   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'.

 
    If --output was not specified but --file-prefix=dir/foo was specified,
 
    If --output was not specified but --file-prefix=dir/foo was specified,

-   ALL_BUT_EXT = `foo.tab' and ALL_BUT_TAB_EXT = `foo'.
+   ALL_BUT_EXT = 'foo.tab' and ALL_BUT_TAB_EXT = 'foo'.

 
    If neither --output nor --file was specified but the input grammar
 
    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'.
+   is name dir/foo.y, ALL_BUT_EXT and ALL_BUT_TAB_EXT are 'foo'.

 
    If neither --output nor --file was specified, DIR_PREFIX is the
    empty string (meaning the current directory); otherwise it is
 
    If neither --output nor --file was specified, DIR_PREFIX is the
    empty string (meaning the current directory); otherwise it is

-   `dir/'.  */
+   'dir/'.  */

 
 char *all_but_ext;
 static char *all_but_tab_ext;
 
 char *all_but_ext;
 static char *all_but_tab_ext;


@@ -78,7 +88,7 @@ char *dir_prefix;
 
 /* C source file extension (the parser source).  */
 static char *src_extension = NULL;
 
 /* C source file extension (the parser source).  */
 static char *src_extension = NULL;

-/* Header file extension (if option ``-d'' is specified).  */
+/* Header file extension (if option '`-d'' is specified).  */

 static char *header_extension = NULL;
 \f
 /*-----------------------------------------------------------------.
 static char *header_extension = NULL;
 \f
 /*-----------------------------------------------------------------.


@@ -109,7 +119,8 @@ xfopen (const char *name, const char *mode)
 
   ptr = fopen_safer (name, mode);
   if (!ptr)
 
   ptr = fopen_safer (name, mode);
   if (!ptr)

-    error (EXIT_FAILURE, get_errno (), _("cannot open file `%s'"), name);
+    error (EXIT_FAILURE, get_errno (),
+           _("%s: cannot open"), quotearg_colon (name));

 
   return ptr;
 }
 
   return ptr;
 }


@@ -125,31 +136,34 @@ xfclose (FILE *ptr)
     return;
 
   if (ferror (ptr))
     return;
 
   if (ferror (ptr))

-    error (EXIT_FAILURE, 0, _("I/O error"));
+    error (EXIT_FAILURE, 0, _("input/output error"));

 
   if (fclose (ptr) != 0)
     error (EXIT_FAILURE, get_errno (), _("cannot close file"));
 }
 \f
 
 
   if (fclose (ptr) != 0)
     error (EXIT_FAILURE, get_errno (), _("cannot close file"));
 }
 \f
 

+FILE *
+xfdopen (int fd, char const *mode)
+{
+  FILE *res = fdopen (fd, mode);
+  if (! res)
+    error (EXIT_FAILURE, get_errno (),
+           /* On a separate line to please the "unmarked_diagnostics"
+              syntax-check. */
+           "fdopen");
+  return res;
+}
+

 /*------------------------------------------------------------------.
 | Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. |
 `------------------------------------------------------------------*/
 
 /*------------------------------------------------------------------.
 | Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. |
 `------------------------------------------------------------------*/
 

-/* In the string S, replace all characters FROM by TO.  */
-static void
-tr (char *s, char from, char to)
-{
-  for (; *s; s++)
-    if (*s == from)
-      *s = to;
-}
-

 /* Compute extensions from the grammar file extension.  */
 static void
 compute_exts_from_gf (const char *ext)
 {
 /* Compute extensions from the grammar file extension.  */
 static void
 compute_exts_from_gf (const char *ext)
 {

-  if (strcmp (ext, ".y") == 0)
+  if (STREQ (ext, ".y"))

     {
       src_extension = xstrdup (language->src_extension);
       header_extension = xstrdup (language->header_extension);
     {
       src_extension = xstrdup (language->src_extension);
       header_extension = xstrdup (language->header_extension);


@@ -186,7 +200,7 @@ compute_exts_from_src (const char *ext)
    *EXT points to the last period in the basename, or NULL if none.
 
    If there is no *EXT, *TAB is NULL.  Otherwise, *TAB points to
    *EXT points to the last period in the basename, or NULL if none.
 
    If there is no *EXT, *TAB is NULL.  Otherwise, *TAB points to

-   `.tab' or `_tab' if present right before *EXT, or is NULL. *TAB
+   '.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 FILE_NAME.
    cannot be equal to *BASE.
 
    None are allocated, they are simply pointers to parts of FILE_NAME.


@@ -209,7 +223,7 @@ compute_exts_from_src (const char *ext)
 
 static void
 file_name_split (const char *file_name,
 
 static void
 file_name_split (const char *file_name,

-                const char **base, const char **tab, const char **ext)
+                 const char **base, const char **tab, const char **ext)

 {
   *base = last_component (file_name);
 
 {
   *base = last_component (file_name);
 


@@ -217,16 +231,15 @@ file_name_split (const char *file_name,
   *ext = strrchr (*base, '.');
   *tab = NULL;
 
   *ext = strrchr (*base, '.');
   *tab = NULL;
 

-  /* If there is an extension, check if there is a `.tab' part right
+  /* If there is an extension, check if there is a '.tab' part right

      before.  */
   if (*ext)
     {
       size_t baselen = *ext - *base;
      before.  */
   if (*ext)
     {
       size_t baselen = *ext - *base;

-      size_t dottablen = 4;
+      size_t dottablen = sizeof (TAB_EXT) - 1;

       if (dottablen < baselen
       if (dottablen < baselen

-         && (strncmp (*ext - dottablen, ".tab", dottablen) == 0
-             || strncmp (*ext - dottablen, "_tab", dottablen) == 0))
-       *tab = *ext - dottablen;
+          && STRPREFIX_LIT (TAB_EXT, *ext - dottablen))
+        *tab = *ext - dottablen;

     }
 }
 
     }
 }
 


@@ -248,42 +261,44 @@ compute_file_name_parts (void)
 
       /* ALL_BUT_EXT goes up the EXT, excluding it. */
       all_but_ext =
 
       /* ALL_BUT_EXT goes up the EXT, excluding it. */
       all_but_ext =

-       xstrndup (spec_outfile,
-                 (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));
+        xstrndup (spec_outfile,
+                  (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));

 
       /* ALL_BUT_TAB_EXT goes up to TAB, excluding it.  */
       all_but_tab_ext =
 
       /* 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))));
+        xstrndup (spec_outfile,
+                  (strlen (spec_outfile)
+                   - (tab ? strlen (tab) : (ext ? strlen (ext) : 0))));

 
       if (ext)
 
       if (ext)

-       compute_exts_from_src (ext);
+        compute_exts_from_src (ext);

     }
   else
     {
       file_name_split (grammar_file, &base, &tab, &ext);
 
       if (spec_file_prefix)
     }
   else
     {
       file_name_split (grammar_file, &base, &tab, &ext);
 
       if (spec_file_prefix)

-       {
-         /* If --file-prefix=foo was specified, ALL_BUT_TAB_EXT = `foo'.  */
-         dir_prefix = xstrndup (grammar_file, base - grammar_file);
-         all_but_tab_ext = 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)
       else if (yacc_flag)

-       {
-         /* If --yacc, then the output is `y.tab.c'.  */
-         dir_prefix = xstrdup ("");
-         all_but_tab_ext = xstrdup ("y");
-       }
+        {
+          /* If --yacc, then the output is 'y.tab.c'.  */
+          dir_prefix = xstrdup ("");
+          all_but_tab_ext = xstrdup ("y");
+        }

       else
       else

-       {
-         /* Otherwise, ALL_BUT_TAB_EXT is computed from the input
-            grammar: `foo/bar.yy' => `bar'.  */
-         dir_prefix = xstrdup ("");
-         all_but_tab_ext =
-           xstrndup (base, (strlen (base) - (ext ? strlen (ext) : 0)));
-       }
+        {
+          /* Otherwise, ALL_BUT_TAB_EXT is computed from the input
+             grammar: 'foo/bar.yy' => 'bar'.  */
+          dir_prefix = xstrdup ("");
+          all_but_tab_ext =
+            xstrndup (base, (strlen (base) - (ext ? strlen (ext) : 0)));
+        }

 
       if (language->add_tab)
         all_but_ext = concat2 (all_but_tab_ext, TAB_EXT);
 
       if (language->add_tab)
         all_but_ext = concat2 (all_but_tab_ext, TAB_EXT);


@@ -292,7 +307,7 @@ compute_file_name_parts (void)
 
       /* Compute the extensions from the grammar file name.  */
       if (ext && !yacc_flag)
 
       /* Compute the extensions from the grammar file name.  */
       if (ext && !yacc_flag)

-       compute_exts_from_gf (ext);
+        compute_exts_from_gf (ext);

     }
 }
 
     }
 }
 


@@ -319,27 +334,28 @@ compute_output_file_names (void)
   if (defines_flag)
     {
       if (! spec_defines_file)
   if (defines_flag)
     {
       if (! spec_defines_file)

-       spec_defines_file = concat2 (all_but_ext, header_extension);
+        spec_defines_file = concat2 (all_but_ext, header_extension);

     }
 
   if (graph_flag)
     {
       if (! spec_graph_file)
     }
 
   if (graph_flag)
     {
       if (! spec_graph_file)

-       spec_graph_file = concat2 (all_but_tab_ext, ".dot");
-      output_file_name_check (spec_graph_file);
+        spec_graph_file = concat2 (all_but_tab_ext, ".dot");
+      output_file_name_check (&spec_graph_file, false);

     }
 
   if (xml_flag)
     {
       if (! spec_xml_file)
     }
 
   if (xml_flag)
     {
       if (! spec_xml_file)

-       spec_xml_file = concat2 (all_but_tab_ext, ".xml");
-      output_file_name_check (spec_xml_file);
+        spec_xml_file = concat2 (all_but_tab_ext, ".xml");
+      output_file_name_check (&spec_xml_file, false);

     }
 
   if (report_flag)
     {
     }
 
   if (report_flag)
     {

-      spec_verbose_file = concat2 (all_but_tab_ext, OUTPUT_EXT);
-      output_file_name_check (spec_verbose_file);
+      if (!spec_verbose_file)
+        spec_verbose_file = concat2 (all_but_tab_ext, OUTPUT_EXT);
+      output_file_name_check (&spec_verbose_file, false);

     }
 
   free (all_but_tab_ext);
     }
 
   free (all_but_tab_ext);


@@ -348,16 +364,48 @@ compute_output_file_names (void)
 }
 
 void
 }
 
 void

-output_file_name_check (char const *file_name)
+output_file_name_check (char **file_name, bool source)

 {
 {

-  {
-    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));
-  }
-  file_names = xnrealloc (file_names, ++file_names_count, sizeof *file_names);
-  file_names[file_names_count-1] = xstrdup (file_name);
+  bool conflict = false;
+  if (STREQ (*file_name, grammar_file))
+    {
+      complain (NULL, complaint, _("refusing to overwrite the input file %s"),
+                quote (*file_name));
+      conflict = true;
+    }
+  else
+    {
+      int i;
+      for (i = 0; i < generated_files_size; i++)
+        if (STREQ (generated_files[i].name, *file_name))
+          {
+            complain (NULL, Wother, _("conflicting outputs to file %s"),
+                      quote (generated_files[i].name));
+            conflict = true;
+          }
+    }
+  if (conflict)
+    {
+      free (*file_name);
+      *file_name = strdup ("/dev/null");
+    }
+  else
+    {
+      generated_files = xnrealloc (generated_files, ++generated_files_size,
+                                   sizeof *generated_files);
+      generated_files[generated_files_size-1].name = xstrdup (*file_name);
+      generated_files[generated_files_size-1].is_source = source;
+    }
+}
+
+void
+unlink_generated_sources (void)
+{
+  int i;
+  for (i = 0; i < generated_files_size; i++)
+    if (generated_files[i].is_source)
+      /* Ignore errors.  The file might not even exist.  */
+      unlink (generated_files[i].name);

 }
 
 void
 }
 
 void


@@ -372,8 +420,8 @@ output_file_names_free (void)
   free (dir_prefix);
   {
     int i;
   free (dir_prefix);
   {
     int i;

-    for (i = 0; i < file_names_count; i++)
-      free (file_names[i]);
+    for (i = 0; i < generated_files_size; i++)
+      free (generated_files[i].name);

   }
   }

-  free (file_names);
+  free (generated_files);

 }
 }