portability: fix spawning on at least FreeBSD 8 and FreeBSD 9.

[bison.git] / src / complain.c

diff --git a/src/complain.c b/src/complain.c
index 7428a4af2f50c95493116348e7d83930f5a94c7b..f7900af45fb8e2ece805d32c4057ce041c0941bb 100644 (file)
--- a/src/complain.c
+++ b/src/complain.c
@@ -1,12 +1,12 @@
 /* Declaration for error-reporting function for Bison.
 
-   Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006
-   Free Software Foundation, Inc.
+   Copyright (C) 2000-2002, 2004-2006, 2009-2010 Free Software
+   Foundation, Inc.
 
-   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 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.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -14,9 +14,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
-   USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Based on error.c and error.h,
    written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
@@ -30,11 +28,8 @@
 #include "files.h"
 #include "getargs.h"
 
-/* The calling program should define program_name and set it to the
-   name of the executing program.  */
-extern char *program_name;
-
 bool complaint_issued;
+static unsigned *indent_ptr = 0;
 
 \f
 
@@ -52,17 +47,27 @@ error_message (location *loc,
               const char *prefix,
               const char *message, va_list args)
 {
+  unsigned pos = 0;
+
   if (loc)
-    location_print (stderr, *loc);
+    pos += location_print (stderr, *loc);
   else
-    fputs (current_file ? current_file : program_name, stderr);
-  fputs (": ", stderr);
+    pos += fprintf(stderr, "%s", current_file ? current_file : program_name);
+  pos += fprintf(stderr, ": ");
+
+  if (indent_ptr)
+    {
+      if (!*indent_ptr)
+        *indent_ptr = pos;
+      else if (*indent_ptr > pos)
+        fprintf (stderr, "%*s", *indent_ptr - pos, "");
+      indent_ptr = 0;
+    }
 
   if (prefix)
     fprintf (stderr, "%s: ", prefix);
 
   vfprintf (stderr, message, args);
-  va_end (args);
   putc ('\n', stderr);
   fflush (stderr);
 }
@@ -73,6 +78,7 @@ error_message (location *loc,
   va_list args;                                        \
   va_start (args, Message);                    \
   error_message (Loc, Prefix, Message, args);  \
+  va_end (args);                               \
 }
 
 
@@ -99,6 +105,15 @@ warn_at (location loc, const char *message, ...)
   ERROR_MESSAGE (&loc, _("warning"), message);
 }
 
+void
+warn_at_indent (location loc, unsigned *indent,
+                const char *message, ...)
+{
+  set_warning_issued ();
+  indent_ptr = indent;
+  ERROR_MESSAGE (&loc, _("warning"), message);
+}
+
 void
 warn (const char *message, ...)
 {
@@ -118,6 +133,15 @@ complain_at (location loc, const char *message, ...)
   complaint_issued = true;
 }
 
+void
+complain_at_indent (location loc, unsigned *indent,
+                    const char *message, ...)
+{
+  indent_ptr = indent;
+  ERROR_MESSAGE (&loc, NULL, message);
+  complaint_issued = true;
+}
+
 void
 complain (const char *message, ...)
 {
@@ -126,6 +150,27 @@ complain (const char *message, ...)
 }
 
 
+/*--------------------------------------------------------------.
+| An incompatibility with POSIX Yacc: mapped either to warn* or |
+| complain* depending on yacc_flag.                             |
+`--------------------------------------------------------------*/
+
+void
+yacc_at (location loc, const char *message, ...)
+{
+  if (yacc_flag)
+    {
+      ERROR_MESSAGE (&loc, NULL, message);
+      complaint_issued = true;
+    }
+  else if (warnings_flag & warnings_yacc)
+    {
+      set_warning_issued ();
+      ERROR_MESSAGE (&loc, _("warning"), message);
+    }
+}
+
+
 /*-------------------------------------------------.
 | A severe error has occurred, we cannot proceed.  |
 `-------------------------------------------------*/