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.
*
*/
#include <assert.h>
#include "transmission.h"
#include "error.h"
#include "utils.h"
tr_error* tr_error_new(int code, char const* 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, char const* 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, char const* 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, char const* 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, char const* 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, char const* 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, char const* 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, char const* 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);
}