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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "avro/errors.h"
/* 4K should be enough, right? */
#define AVRO_ERROR_SIZE 4096
/*
* To support the avro_prefix_error function, we keep two string buffers
* around. The AVRO_CURRENT_ERROR points at the buffer that's holding
* the current error message. avro_prefix error writes into the other
* buffer, and then swaps them.
*/
struct avro_error_data_t {
char AVRO_ERROR1[AVRO_ERROR_SIZE];
char AVRO_ERROR2[AVRO_ERROR_SIZE];
char *AVRO_CURRENT_ERROR;
char *AVRO_OTHER_ERROR;
};
#if defined THREADSAFE
#if ( defined __unix__ || defined __unix )
#include <pthread.h>
static pthread_key_t error_data_key;
static pthread_once_t error_data_key_once = PTHREAD_ONCE_INIT;
static void make_error_data_key()
{
pthread_key_create(&error_data_key, free);
}
#elif defined _WIN32
#include <Windows.h>
static __declspec( thread ) struct avro_error_data_t TLS_ERROR_DATA = { "", "", NULL, NULL };
#endif /* unix||_unix||_WIN32 */
#endif /* THREADSAFE */
static struct avro_error_data_t *
avro_get_error_data(void)
{
#if defined THREADSAFE
#if defined __unix__ || defined __unix
pthread_once(&error_data_key_once, make_error_data_key);
struct avro_error_data_t *ERROR_DATA =
(struct avro_error_data_t*) pthread_getspecific(error_data_key);
if (!ERROR_DATA) {
ERROR_DATA = (struct avro_error_data_t*) malloc(sizeof(struct avro_error_data_t));
pthread_setspecific(error_data_key, ERROR_DATA);
ERROR_DATA->AVRO_ERROR1[0] = '\0';
ERROR_DATA->AVRO_ERROR2[0] = '\0';
ERROR_DATA->AVRO_CURRENT_ERROR = ERROR_DATA->AVRO_ERROR1;
ERROR_DATA->AVRO_OTHER_ERROR = ERROR_DATA->AVRO_ERROR2;
}
return ERROR_DATA;
#elif defined _WIN32
if ( TLS_ERROR_DATA.AVRO_CURRENT_ERROR == NULL )
{
//first usage of the ERROR_DATA, initialize 'current' and 'other' pointers.
TLS_ERROR_DATA.AVRO_CURRENT_ERROR = TLS_ERROR_DATA.AVRO_ERROR1;
TLS_ERROR_DATA.AVRO_OTHER_ERROR = TLS_ERROR_DATA.AVRO_ERROR2;
}
return &TLS_ERROR_DATA;
#endif /* UNIX and WIN32 threadsafe handling */
#else /* not thread-safe */
static struct avro_error_data_t ERROR_DATA = {
/* .AVRO_ERROR1 = */ {'\0'},
/* .AVRO_ERROR2 = */ {'\0'},
/* .AVRO_CURRENT_ERROR = */ ERROR_DATA.AVRO_ERROR1,
/* .AVRO_OTHER_ERROR = */ ERROR_DATA.AVRO_ERROR2,
};
return &ERROR_DATA;
#endif
}
void
avro_set_error(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vsnprintf(avro_get_error_data()->AVRO_CURRENT_ERROR, AVRO_ERROR_SIZE, fmt, args);
va_end(args);
//fprintf(stderr, "--- %s\n", AVRO_CURRENT_ERROR);
}
void
avro_prefix_error(const char *fmt, ...)
{
struct avro_error_data_t *ERROR_DATA = avro_get_error_data();
/*
* First render the prefix into OTHER_ERROR.
*/
va_list args;
va_start(args, fmt);
int bytes_written = vsnprintf(ERROR_DATA->AVRO_OTHER_ERROR, AVRO_ERROR_SIZE, fmt, args);
va_end(args);
/*
* Then concatenate the existing error onto the end.
*/
if (bytes_written < AVRO_ERROR_SIZE) {
strncpy(&ERROR_DATA->AVRO_OTHER_ERROR[bytes_written], ERROR_DATA->AVRO_CURRENT_ERROR,
AVRO_ERROR_SIZE - bytes_written);
ERROR_DATA->AVRO_OTHER_ERROR[AVRO_ERROR_SIZE-1] = '\0';
}
/*
* Swap the two error pointers.
*/
char *tmp;
tmp = ERROR_DATA->AVRO_OTHER_ERROR;
ERROR_DATA->AVRO_OTHER_ERROR = ERROR_DATA->AVRO_CURRENT_ERROR;
ERROR_DATA->AVRO_CURRENT_ERROR = tmp;
//fprintf(stderr, "+++ %s\n", AVRO_CURRENT_ERROR);
}
const char *avro_strerror(void)
{
return avro_get_error_data()->AVRO_CURRENT_ERROR;
}
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