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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 (Fractal Image And Sequence COdec)
* Copyright (C) 1994-2000 Ullrich Hafner
*/
#define _ERROR_C
#include "config.h"
#include <stdbool.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 * const format, ...) {
/*----------------------------------------------------------------------------
Set error text to given string.
-----------------------------------------------------------------------------*/
va_list args;
unsigned len;
bool error;
const char * str;
VA_START (args, format);
/* Compute how long the error text will be: 'len' */
for (len = strlen(format), str = &format[0], error = false;
*str && !error; ) {
str = strchr(str, '%');
if (*str) {
++str; /* Move past % */
if (*str == 's') {
char * const vstring = va_arg (args, char *);
len += strlen(vstring);
} else if (*str == 'd') {
(void)va_arg(args, int);
len += 10;
} else if (*str == 'c') {
(void)va_arg(args, int);
len += 1;
} else
error = true;
if (!error)
++str;
}
}
va_end(args);
if (!error) {
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 * const format, ...) {
/*----------------------------------------------------------------------------
Set error text to given string.
-----------------------------------------------------------------------------*/
va_list args;
unsigned len;
const char * str;
len = 0; /* initial value */
str = &format[0]; /* initial value */
VA_START (args, format);
len = strlen (format);
while ((str = strchr (str, '%'))) {
++str;
if (*str == 's') {
char * const vstring = va_arg (args, char *);
len += strlen(vstring);
} else if (*str == 'd') {
(void)va_arg(args, int);
len += 10;
} else if (*str == 'c') {
(void)va_arg(args, int);
len += 1;
} else {
#if HAVE_SETJMP_H
longjmp(env, 1);
#else
exit(1);
#endif
};
++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
exit(1);
#endif
}
const char *
fiasco_get_error_message(void) {
/*----------------------------------------------------------------------------
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 * const filename) {
/*----------------------------------------------------------------------------
Print file error message and exit.
-----------------------------------------------------------------------------*/
error("File `%s': I/O Error - %s.", filename, get_system_error ());
}
void
warning(const char * const format, ...) {
/*----------------------------------------------------------------------------
Issue a warning.
-----------------------------------------------------------------------------*/
va_list args;
VA_START (args, format);
if (verboselevel == FIASCO_NO_VERBOSITY) {
/* User doesn't want warnings */
} else {
fprintf (stderr, "Warning: ");
vfprintf (stderr, format, args);
fputc ('\n', stderr);
}
va_end (args);
}
void
message(const char * const format, ...) {
/*----------------------------------------------------------------------------
Print a message to Standard Error
-----------------------------------------------------------------------------*/
va_list args;
VA_START (args, format);
if (verboselevel == FIASCO_NO_VERBOSITY) {
/* User doesn't want messages */
} else {
vfprintf (stderr, format, args);
fputc ('\n', stderr);
}
va_end (args);
}
void
debug_message(const char * const format, ...) {
/*----------------------------------------------------------------------------
Print a message to Standard Error if debug messages are enabled.
-----------------------------------------------------------------------------*/
va_list args;
VA_START (args, format);
if (verboselevel >= FIASCO_ULTIMATE_VERBOSITY) {
fprintf (stderr, "*** ");
vfprintf (stderr, format, args);
fputc ('\n', stderr);
}
va_end (args);
}
void
info(const char * const format, ...) {
/*----------------------------------------------------------------------------
Print a message to stderr. Do not append a newline.
-----------------------------------------------------------------------------*/
va_list args;
VA_START (args, format);
if (verboselevel == FIASCO_NO_VERBOSITY) {
/* User doesn't want informational messages */
} else {
vfprintf (stderr, format, args);
fflush (stderr);
}
va_end (args);
}
void
fiasco_set_verbosity(fiasco_verbosity_e const level) {
verboselevel = level;
}
fiasco_verbosity_e
fiasco_get_verbosity(void) {
return verboselevel;
}
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