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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
*
* http://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 <Thrift.h>
#include <cstring>
#include <cstdlib>
#include <boost/lexical_cast.hpp>
#include <stdarg.h>
#include <stdio.h>
namespace apache { namespace thrift {
TOutput GlobalOutput;
void TOutput::printf(const char *message, ...) {
// Try to reduce heap usage, even if printf is called rarely.
static const int STACK_BUF_SIZE = 256;
char stack_buf[STACK_BUF_SIZE];
va_list ap;
va_start(ap, message);
int need = vsnprintf(stack_buf, STACK_BUF_SIZE, message, ap);
va_end(ap);
if (need < STACK_BUF_SIZE) {
f_(stack_buf);
return;
}
char *heap_buf = (char*)malloc((need+1) * sizeof(char));
if (heap_buf == NULL) {
// Malloc failed. We might as well print the stack buffer.
f_(stack_buf);
return;
}
va_start(ap, message);
int rval = vsnprintf(heap_buf, need+1, message, ap);
va_end(ap);
// TODO(shigin): inform user
if (rval != -1) {
f_(heap_buf);
}
free(heap_buf);
}
void TOutput::perror(const char *message, int errno_copy) {
std::string out = message + strerror_s(errno_copy);
f_(out.c_str());
}
std::string TOutput::strerror_s(int errno_copy) {
#ifndef HAVE_STRERROR_R
return "errno = " + boost::lexical_cast<std::string>(errno_copy);
#else // HAVE_STRERROR_R
char b_errbuf[1024] = { '\0' };
#ifdef STRERROR_R_CHAR_P
char *b_error = strerror_r(errno_copy, b_errbuf, sizeof(b_errbuf));
#else
char *b_error = b_errbuf;
int rv = strerror_r(errno_copy, b_errbuf, sizeof(b_errbuf));
if (rv == -1) {
// strerror_r failed. omgwtfbbq.
return "XSI-compliant strerror_r() failed with errno = " +
boost::lexical_cast<std::string>(errno_copy);
}
#endif
// Can anyone prove that explicit cast is probably not necessary
// to ensure that the string object is constructed before
// b_error becomes invalid?
return std::string(b_error);
#endif // HAVE_STRERROR_R
}
}} // apache::thrift
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