transmission/libtransmission/error.c

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/*
* This file Copyright (C) 2013-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
* $Id$
*/
#include <assert.h>
#include "transmission.h"
#include "error.h"
#include "utils.h"
tr_error *
tr_error_new (int code,
const char * message_format,
...)
{
tr_error * error;
va_list args;
assert (message_format != NULL);
va_start (args, message_format);
error = tr_error_new_valist (code, message_format, args);
va_end (args);
return error;
}
tr_error *
tr_error_new_literal (int code,
const char * message)
{
tr_error * error;
assert (message != NULL);
error = tr_new (tr_error, 1);
error->code = code;
error->message = tr_strdup (message);
return error;
}
tr_error *
tr_error_new_valist (int code,
const char * message_format,
va_list args)
{
tr_error * error;
assert (message_format != NULL);
error = tr_new (tr_error, 1);
error->code = code;
error->message = tr_strdup_vprintf (message_format, args);
return error;
}
void
tr_error_free (tr_error * error)
{
if (error == NULL)
return;
tr_free (error->message);
tr_free (error);
}
void
tr_error_set (tr_error ** error,
int code,
const char * message_format,
...)
{
va_list args;
if (error == NULL)
return;
assert (*error == NULL);
assert (message_format != NULL);
va_start (args, message_format);
*error = tr_error_new_valist (code, message_format, args);
va_end (args);
}
void
tr_error_set_literal (tr_error ** error,
int code,
const char * message)
{
if (error == NULL)
return;
assert (*error == NULL);
assert (message != NULL);
*error = tr_error_new_literal (code, message);
}
void
tr_error_propagate (tr_error ** new_error,
tr_error ** old_error)
{
assert (old_error != NULL);
assert (*old_error != NULL);
if (new_error != NULL)
{
assert (*new_error == NULL);
*new_error = *old_error;
*old_error = NULL;
}
else
{
tr_error_clear (old_error);
}
}
void
tr_error_clear (tr_error ** error)
{
if (error == NULL)
return;
tr_error_free (*error);
*error = NULL;
}
static void
error_prefix_valist (tr_error ** error,
const char * prefix_format,
va_list args)
{
char * prefix;
char * new_message;
assert (error != NULL);
assert (*error != NULL);
assert (prefix_format != NULL);
prefix = tr_strdup_vprintf (prefix_format, args);
new_message = tr_strdup_printf ("%s%s", prefix, (*error)->message);
tr_free ((*error)->message);
(*error)->message = new_message;
tr_free (prefix);
}
void
tr_error_prefix (tr_error ** error,
const char * prefix_format,
...)
{
va_list args;
assert (prefix_format != NULL);
if (error == NULL || *error == NULL)
return;
va_start (args, prefix_format);
error_prefix_valist (error, prefix_format, args);
va_end (args);
}
void
tr_error_propagate_prefixed (tr_error ** new_error,
tr_error ** old_error,
const char * prefix_format,
...)
{
va_list args;
assert (prefix_format != NULL);
tr_error_propagate (new_error, old_error);
if (new_error == NULL)
return;
va_start (args, prefix_format);
error_prefix_valist (new_error, prefix_format, args);
va_end (args);
}