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/********************* */
/*! \file exception.cpp
** \verbatim
** Top contributors (to current version):
** Tim King, Morgan Deters, Andres Noetzli
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
** in the top-level source directory and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief CVC4's exception base class and some associated utilities
**
** CVC4's exception base class and some associated utilities.
**/
#include "base/exception.h"
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include "base/check.h"
using namespace std;
namespace CVC4 {
thread_local LastExceptionBuffer* LastExceptionBuffer::s_currentBuffer = nullptr;
LastExceptionBuffer::LastExceptionBuffer() : d_contents(nullptr) {}
LastExceptionBuffer::~LastExceptionBuffer() {
if(d_contents != nullptr){
free(d_contents);
d_contents = nullptr;
}
}
void LastExceptionBuffer::setContents(const char* string) {
if(d_contents != nullptr){
free(d_contents);
d_contents = nullptr;
}
if(string != nullptr){
d_contents = strdup(string);
}
}
const char* IllegalArgumentException::s_header = "Illegal argument detected";
std::string IllegalArgumentException::formatVariadic() {
return std::string();
}
std::string IllegalArgumentException::formatVariadic(const char* format, ...) {
va_list args;
va_start(args, format);
int n = 512;
char* buf = nullptr;
for (int i = 0; i < 2; ++i){
Assert(n > 0);
delete[] buf;
buf = new char[n];
va_list args_copy;
va_copy(args_copy, args);
int size = vsnprintf(buf, n, format, args);
va_end(args_copy);
if(size >= n){
buf[n-1] = '\0';
n = size + 1;
} else {
break;
}
}
// buf is not nullptr is an invariant.
// buf is also 0 terminated.
Assert(buf != nullptr);
std::string result(buf);
delete [] buf;
va_end(args);
return result;
}
std::string IllegalArgumentException::format_extra(const char* condStr, const char* argDesc){
return ( std::string("`") + argDesc + "' is a bad argument"
+ (*condStr == '\0' ? std::string() :
( std::string("; expected ") +
condStr + " to hold" )) );
}
void IllegalArgumentException::construct(const char* header, const char* extra,
const char* function, const char* tail) {
// try building the exception msg with a smallish buffer first,
// then with a larger one if sprintf tells us to.
int n = 512;
char* buf;
for(;;) {
buf = new char[n];
int size;
if(extra == nullptr) {
size = snprintf(buf, n, "%s\n%s\n%s",
header, function, tail);
} else {
size = snprintf(buf, n, "%s\n%s\n\n %s\n%s",
header, function, extra, tail);
}
if(size < n) {
break;
} else {
// size >= n
// try again with a buffer that's large enough
n = size + 1;
delete [] buf;
}
}
setMessage(string(buf));
#ifdef CVC4_DEBUG
LastExceptionBuffer* buffer = LastExceptionBuffer::getCurrent();
if(buffer != nullptr){
if(buffer->getContents() == nullptr) {
buffer->setContents(buf);
}
}
#endif /* CVC4_DEBUG */
delete [] buf;
}
void IllegalArgumentException::construct(const char* header, const char* extra,
const char* function) {
// try building the exception msg with a smallish buffer first,
// then with a larger one if sprintf tells us to.
int n = 256;
char* buf;
for(;;) {
buf = new char[n];
int size;
if(extra == nullptr) {
size = snprintf(buf, n, "%s.\n%s\n",
header, function);
} else {
size = snprintf(buf, n, "%s.\n%s\n\n %s\n",
header, function, extra);
}
if(size < n) {
break;
} else {
// try again with a buffer that's large enough
n = size + 1;
delete [] buf;
}
}
setMessage(string(buf));
#ifdef CVC4_DEBUG
LastExceptionBuffer* buffer = LastExceptionBuffer::getCurrent();
if(buffer != nullptr){
if(buffer->getContents() == nullptr) {
buffer->setContents(buf);
}
}
#endif /* CVC4_DEBUG */
delete [] buf;
}
} /* namespace CVC4 */
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