lean2/src/util/script_exception.cpp

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/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#include <sstream>
#include <string>
#include <cstdlib>
#include "util/thread.h"
#include "util/debug.h"
#include "util/script_exception.h"
namespace lean {
script_exception::script_exception(char const * lua_error) {
lean_assert(lua_error);
std::string fname;
std::string line;
std::string msg;
int state = 0;
char const * it = lua_error;
while (*it) {
if (state == 0) {
if (*it == ':') {
state = 1;
} else {
fname += *it;
}
} else if (state == 1) {
if (*it == ':') {
state = 2;
} else {
line += *it;
}
} else {
msg += *it;
}
it++;
}
if (state != 2) {
// failed to decode Lua error message
m_source = source::Unknown;
m_msg = lua_error;
} else {
if (fname == "[string \"...\"]") {
m_source = source::String;
} else {
m_source = source::File;
m_file = fname;
}
m_line = atoi(line.c_str());
m_msg = msg;
}
}
script_exception::~script_exception() {
}
char const * script_exception::get_file_name() const {
lean_assert(get_source() == source::File);
return m_file.c_str();
}
unsigned script_exception::get_line() const {
lean_assert(get_source() != source::Unknown);
return m_line;
}
char const * script_exception::get_msg() const noexcept {
return exception::what();
}
char const * script_exception::what() const noexcept {
static LEAN_THREAD_LOCAL std::string buffer;
std::ostringstream strm;
char const * msg = get_msg();
char const * space = msg && *msg == ' ' ? "" : " ";
switch (get_source()) {
case source::String: strm << "[string]:" << get_line() << ":" << space << get_msg(); break;
case source::File: strm << get_file_name() << ":" << get_line() << ":" << space << get_msg(); break;
case source::Unknown: return get_msg();
}
buffer = strm.str();
return buffer.c_str();
}
script_nested_exception::script_nested_exception(source s, std::string f, unsigned l, std::shared_ptr<exception> const & ex):
script_exception(s, f, l, "Lean exception"),
m_exception(ex) {
lean_assert(ex);
}
script_nested_exception::~script_nested_exception() {}
char const * script_nested_exception::what() const noexcept {
std::string super_what = script_exception::what();
std::string nested_what = get_exception().what();
{
static LEAN_THREAD_LOCAL std::string buffer;
std::ostringstream strm;
strm << super_what << "\n" << nested_what;
buffer = strm.str();
return buffer.c_str();
}
}
}