home *** CD-ROM | disk | FTP | other *** search
- /* Provides a useful variable-length argument error handling abstraction.
-
- Copyright (C) 1989 Free Software Foundation, Inc.
- written by Douglas C. Schmidt (schmidt@ics.uci.edu)
-
- This file is part of GNU GPERF.
-
- GNU GPERF 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 1, or (at your option)
- any later version.
-
- GNU GPERF 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 GNU GPERF; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <stdio.h>
- #include <std.h>
- #include <stdarg.h>
- #include "std-err.h"
- #include "trace.h"
-
- char * Std_Err::program_name;
-
- /* Sets name of program. */
-
- void
- Std_Err::set_program_name (char *prog_name)
- {
- T (Trace t ("Std_Err::set_program_name");)
- program_name = prog_name;
- }
-
- /* Valid Options (prefixed by '%', as in printf format strings) include:
- 'a': exit the program at this point (var-argument is the exit status!)
- 'c': print a character
- 'd': print a decimal number
- 'e': call the function pointed to by the corresponding argument
- 'f','g': print a double
- 'n': print the name of the program (NULL if not set in constructor or elsewhere)
- 'p': print out the appropriate errno value from sys_errlist
- 's': print out a character string
- '%': print out a single percent sign, '%' */
-
- void
- Std_Err::report_error (char *format, ...)
- {
- T (Trace t ("Std_Err::report_error");)
- extern int errno, sys_nerr;
- extern char *sys_errlist[];
- typedef void (*PTF)();
- va_list argp;
-
- va_start (argp, format);
- for ( ; *format; format++)
- {
- if (*format != '%')
- putc (*format, stderr);
- else
- {
- switch (*++format)
- {
- case '%' : putc ('%', stderr); break;
- case 'a' : exit (va_arg (argp, int));
- case 'c' : putc (va_arg (argp, int), stderr); break;
- case 'd' : fprintf (stderr, "%d", va_arg (argp, int)); break;
- case 'e' : (*va_arg (argp, PTF))(); break;
- case 'f' : fprintf (stderr, "%g", va_arg (argp, double)); break;
- case 'n' : fputs (program_name ? program_name : "error", stderr); break;
- case 'p' :
- if (errno >= 0 && errno < sys_nerr)
- fprintf (stderr, "%s: %s", va_arg (argp, char *), sys_errlist[errno]);
- else
- fprintf (stderr, "<unknown error> %d", errno);
- break;
- case 's' : fputs (va_arg (argp, char *), stderr); break;
- }
- }
- }
- va_end (argp);
- }
-