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/*
* error.c: Error handling
*
* Written by: Stefan Frank
* Ullrich Hafner
*
* Credits: Modelled after variable argument routines from Jef
* Poskanzer's pbmplus package.
*
* This file is part of FIASCO («F»ractal «I»mage «A»nd «S»equence «CO»dec)
* Copyright (C) 1994-2000 Ullrich Hafner <hafner@bigfoot.de>
"int dummy = " change to int dummy; dummy =" for Netpbm to avoid
unused variable warning.
*/
/*
* $Date: 2000/06/14 20:49:37 $
* $Author: hafner $
* $Revision: 5.1 $
* $State: Exp $
*/
#define _ERROR_C
#include "config.h"
#include <stdio.h>
#include <errno.h>
#include <stdarg.h>
#define VA_START(args, lastarg) va_start(args, lastarg)
#include <string.h>
#if HAVE_SETJMP_H
# include <setjmp.h>
#endif /* HAVE_SETJMP_H */
#include "types.h"
#include "macros.h"
#include "error.h"
#include "misc.h"
#include "fiasco.h"
/*****************************************************************************
local variables
*****************************************************************************/
static fiasco_verbosity_e verboselevel = FIASCO_SOME_VERBOSITY;
static char *error_message = NULL;
#if HAVE_SETJMP_H
jmp_buf env;
#endif /* HAVE_SETJMP_H */
/*****************************************************************************
public code
*****************************************************************************/
void
set_error (const char *format, ...)
/*
* Set error text to given string.
*/
{
va_list args;
unsigned len = 0;
const char *str = format;
VA_START (args, format);
len = strlen (format);
while ((str = strchr (str, '%')))
{
str++;
if (*str == 's')
{
char *vstring = va_arg (args, char *);
len += strlen (vstring);
}
else if (*str == 'd')
{
int dummy;
dummy = va_arg (args, int);
len += 10;
}
else if (*str == 'c')
{
int dummy;
dummy = va_arg (args, int);
len += 1;
}
else
return;
str++;
}
va_end(args);
VA_START (args, format);
if (error_message)
Free (error_message);
error_message = Calloc (len, sizeof (char));
vsprintf (error_message, format, args);
va_end (args);
}
void
error (const char *format, ...)
/*
* Set error text to given string.
*/
{
va_list args;
unsigned len = 0;
const char *str = format;
VA_START (args, format);
len = strlen (format);
while ((str = strchr (str, '%')))
{
str++;
if (*str == 's')
{
char *vstring = va_arg (args, char *);
len += strlen (vstring);
}
else if (*str == 'd')
{
int dummy;
dummy = va_arg (args, int);
len += 10;
}
else if (*str == 'c')
{
int dummy;
dummy = va_arg (args, int);
len += 1;
}
else
{
#if HAVE_SETJMP_H
longjmp (env, 1);
#else /* not HAVE_SETJMP_H */
exit (1);
#endif /* HAVE_SETJMP_H */
};
str++;
}
va_end(args);
VA_START (args, format);
if (error_message)
Free (error_message);
error_message = Calloc (len, sizeof (char));
vsprintf (error_message, format, args);
va_end (args);
#if HAVE_SETJMP_H
longjmp (env, 1);
#else /* not HAVE_SETJMP_H */
exit (1);
#endif /* HAVE_SETJMP_H */
}
const char *
fiasco_get_error_message (void)
/*
* Return value:
* Last error message of FIASCO library.
*/
{
return error_message ? error_message : "";
}
const char *
get_system_error (void)
{
return strerror (errno);
}
void
file_error (const char *filename)
/*
* Print file error message and exit.
*
* No return value.
*/
{
error ("File `%s': I/O Error - %s.", filename, get_system_error ());
}
void
warning (const char *format, ...)
/*
* Issue a warning and continue execution.
*
* No return value.
*/
{
va_list args;
VA_START (args, format);
if (verboselevel == FIASCO_NO_VERBOSITY)
return;
fprintf (stderr, "Warning: ");
vfprintf (stderr, format, args);
fputc ('\n', stderr);
va_end (args);
}
void
message (const char *format, ...)
/*
* Print a message to stderr.
*/
{
va_list args;
VA_START (args, format);
if (verboselevel == FIASCO_NO_VERBOSITY)
return;
vfprintf (stderr, format, args);
fputc ('\n', stderr);
va_end (args);
}
void
debug_message (const char *format, ...)
/*
* Print a message to stderr.
*/
{
va_list args;
VA_START (args, format);
if (verboselevel < FIASCO_ULTIMATE_VERBOSITY)
return;
fprintf (stderr, "*** ");
vfprintf (stderr, format, args);
fputc ('\n', stderr);
va_end (args);
}
void
info (const char *format, ...)
/*
* Print a message to stderr. Do not append a newline.
*/
{
va_list args;
VA_START (args, format);
if (verboselevel == FIASCO_NO_VERBOSITY)
return;
vfprintf (stderr, format, args);
fflush (stderr);
va_end (args);
}
void
fiasco_set_verbosity (fiasco_verbosity_e level)
{
verboselevel = level;
}
fiasco_verbosity_e
fiasco_get_verbosity (void)
{
return verboselevel;
}
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