+/* Declaration for error-reporting function for Bison.
+ Copyright (C) 2000 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 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 this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ USA. */
+
+/* Based on error.c and error.h,
+ written by David MacKenzie <djm@gnu.ai.mit.edu>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+
+#if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
+# if __STDC__
+# include <stdarg.h>
+# define VA_START(args, lastarg) va_start(args, lastarg)
+# else
+# include <varargs.h>
+# define VA_START(args, lastarg) va_start(args)
+# endif
+#else
+# define va_alist a1, a2, a3, a4, a5, a6, a7, a8
+# define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
+#endif
+
+#if STDC_HEADERS || _LIBC
+# include <stdlib.h>
+# include <string.h>
+#else
+void exit ();
+#endif
+
+#include "complain.h"
+
+#ifndef _
+# define _(String) String
+#endif
+
+#ifdef _LIBC
+/* In the GNU C library, there is a predefined variable for this. */
+# define program_name program_invocation_name
+#else /* not _LIBC */
+/* The calling program should define program_name and set it to the
+ name of the executing program. */
+extern char *program_name;
+#endif
+
+/* This variable is incremented each time `warn' is called. */
+unsigned int warn_message_count;
+
+/* This variable is incremented each time `complain' is called. */
+unsigned int complain_message_count;
+
+/* Sometimes we want to have at most one error per line. This
+ variable controls whether this mode is selected or not. */
+int error_one_per_line;
+\f
+/*--------------------------------.
+| Report a warning, and proceed. |
+`--------------------------------*/
+
+void
+#if defined VA_START && __STDC__
+warn (const char *message, ...)
+#else
+warn (message, va_alist)
+ char *message;
+ va_dcl
+#endif
+{
+#ifdef VA_START
+ va_list args;
+#endif
+
+ if (error_one_per_line)
+ {
+ static const char *old_infile;
+ static unsigned int old_lineno;
+
+ if (old_lineno == lineno &&
+ (infile == old_infile || !strcmp (old_infile, infile)))
+ /* Simply return and print nothing. */
+ return;
+
+ old_infile = infile;
+ old_lineno = lineno;
+ }
+
+ fflush (stdout);
+ if (infile != NULL)
+ fprintf (stderr, "%s:%d: ", infile, lineno);
+ else
+ fprintf (stderr, "%s:", program_name);
+
+ fputs (_("warning: "), stderr);
+
+#ifdef VA_START
+ VA_START (args, message);
+ vfprintf (stderr, message, args);
+ va_end (args);
+#else
+ fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
+#endif
+
+ ++warn_message_count;
+ putc ('\n', stderr);
+ fflush (stderr);
+}
+\f
+/*-----------------------------------------------------------.
+| An error has occurred, but we can proceed, and die later. |
+`-----------------------------------------------------------*/
+
+void
+#if defined VA_START && __STDC__
+complain (const char *message, ...)
+#else
+complain (message, va_alist)
+ char *message;
+ va_dcl
+#endif
+{
+#ifdef VA_START
+ va_list args;
+#endif
+
+ if (error_one_per_line)
+ {
+ static const char *old_infile;
+ static unsigned int old_lineno;
+
+ if (old_lineno == lineno &&
+ (infile == old_infile || !strcmp (old_infile, infile)))
+ /* Simply return and print nothing. */
+ return;
+
+ old_infile = infile;
+ old_lineno = lineno;
+ }
+
+ fflush (stdout);
+ if (infile != NULL)
+ fprintf (stderr, "%s:%d: ", infile, lineno);
+ else
+ fprintf (stderr, "%s:", program_name);
+
+#ifdef VA_START
+ VA_START (args, message);
+ vfprintf (stderr, message, args);
+ va_end (args);
+#else
+ fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
+#endif
+
+ ++complain_message_count;
+ putc ('\n', stderr);
+ fflush (stderr);
+}
+\f
+/*-------------------------------------------------.
+| A severe error has occurred, we cannot proceed. |
+`-------------------------------------------------*/
+
+void
+#if defined VA_START && __STDC__
+fatal (const char *message, ...)
+#else
+fatal (message, va_alist)
+ char *message;
+ va_dcl
+#endif
+{
+#ifdef VA_START
+ va_list args;
+#endif
+
+ fflush (stdout);
+ if (infile != NULL)
+ fprintf (stderr, "%s:%d: ", infile, lineno);
+ else
+ fprintf (stderr, "%s:", program_name);
+
+ fputs (_("fatal error: "), stderr);
+
+#ifdef VA_START
+ VA_START (args, message);
+ vfprintf (stderr, message, args);
+ va_end (args);
+#else
+ fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
+#endif
+ putc ('\n', stderr);
+ fflush (stderr);
+ exit (1);
+}
+\f
+/*------------------------------------------------------------------.
+| A severe error has occurred, we cannot proceed. Exit with STATUS, |
+| and report the error message of the errno ERRNUM. |
+`------------------------------------------------------------------*/
+
+void
+#if defined VA_START && __STDC__
+error (int status, int errnum,
+ const char *message, ...)
+#else
+error (status, errnum, message, va_alist)
+ int status;
+ int errnum;
+ char *message;
+ va_dcl
+#endif
+{
+#ifdef VA_START
+ va_list args;
+#endif
+
+ fflush (stdout);
+ if (infile != NULL)
+ fprintf (stderr, "%s:%d: ", infile, lineno);
+ else
+ fprintf (stderr, "%s:", program_name);
+
+ fputs (_("fatal error: "), stderr);
+
+#ifdef VA_START
+ VA_START (args, message);
+ vfprintf (stderr, message, args);
+ va_end (args);
+#else
+ fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
+#endif
+
+ if (errnum)
+ {
+#if defined HAVE_STRERROR_R || _LIBC
+ char errbuf[1024];
+# if HAVE_WORKING_STRERROR_R || _LIBC
+ fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));
+# else
+ /* Don't use __strerror_r's return value because on some systems
+ (at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */
+ __strerror_r (errnum, errbuf, sizeof errbuf);
+ fprintf (stderr, ": %s", errbuf);
+# endif
+#else
+ fprintf (stderr, ": %s", strerror (errnum));
+#endif
+ }
+ putc ('\n', stderr);
+ fflush (stderr);
+ if (status)
+ exit (status);
+}
projects / bison.git / commitdiff
