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sli_interpreter.cpp
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#include "sli_interpreter.h"
#include "sli_module.h"
#include "sli_nametype.h"
#include "sli_dicttype.h"
#include "sli_functiontype.h"
#include "sli_string.h"
#include "sli_stringtype.h"
#include "compose.hpp"
#include "sli_numerics.h"
#include "sli_parser.h"
#include "sli_control.h"
#include "sli_math.h"
#include "sli_stack.h"
#include "sli_typecheck.h"
#include "sli_trietype.h"
#include <time.h>
/* BeginDocumentation
Name: Pi - Value of the constant Pi= 3.1415...
Synopsis: Pi -> double
Description: Pi yields an approximation with a precision of 12 digits.
Author: Diesmann, Hehl
FirstVersion: 10.6.99
References:
SeeAlso: E, sin, cos
*/
/* BeginDocumentation
Name: E - Value of the Euler constant E=2.718...
Synopsis: E -> double
Description: E is the result of the builtin function std::exp(1).
The precision of this value is therefore system-dependent.
Author: Diesmann, Hehl
FirstVersion: 10.6.99
SeeAlso: exp
*/
/* BeginDocumentation
Name: errordict - pushes error dictionary on operand stack
Synopsis: errordict -> dict
Description:
Pushes the dictionary object errordict on the operand stack.
errordict is not an operator; it is a name in systemdict associated
with the dictionary object.
The flag newerror helps to distinguish
between interrupts caused by call of
stop and interrupts raised by raiseerror.
The name command contains the name of the command which
caused the most recent error.
The flag recordstacks decides whether the state of the interpreter
is saved on error.
If reckordstacks is true, the following state objects are saved
Operand stack -> ostack
Dictionary stack -> dstack
Execution stack -> estack
Parameters: none
Examples: errordict info -> shows errordict
Remarks: commented 1.4.1999, Diesmann
SeeAlso: raiseerror, raiseagain, info
References: The Red Book 2nd. ed. p. 408
*/
namespace sli3
{
int signalflag =0;
SLIInterpreter::SLIInterpreter()
:
mark_name("mark"),
iparse_name("::parse"),
iparsestdin_name("::parsestdin"),
ilookup_name("::lookup"),
ipop_name("::pop"),
iiterate_name("::executeprocedure"),
iloop_name("::loop"),
irepeat_name("::repeat"),
ifor_name("::for"),
iforallarray_name("::forall_a"),
iforallindexedarray_name("::forallindexed_a"),
iforallindexedstring_name("::forallindexed_s"),
iforallstring_name("::forall_s"),
pi_name("Pi"),
e_name("E"),
stop_name("stop"),
end_name("end"),
EndSymbol("EndSymbol"),
null_name("null"),
true_name("true"),
false_name("false"),
istopped_name("::stopped"),
systemdict_name("systemdict"),
userdict_name("userdict"),
errordict_name("errordict"),
quitbyerror_name("quitbyerror"),
newerror_name("newerror"),
errorname_name("errorname"),
commandname_name("commandname"),
signo_name("sys_signo"),
recordstacks_name("recordstacks"),
estack_name("estack"),
ostack_name("ostack"),
dstack_name("dstack"),
commandstring_name("moduleinitializers"),
interpreter_name("SLIInterpreter::execute"),
ArgumentTypeError("ArgumentType"),
StackUnderflowError("StackUnderflow"),
UndefinedNameError("UndefinedName"),
WriteProtectedError("WriteProtected"),
DivisionByZeroError("DivisionByZero"),
RangeCheckError("RangeCheck"),
PositiveIntegerExpectedError("PositiveIntegerExpected"),
BadIOError("BadIO"),
StringStreamExpectedError("StringStreamExpected"),
CycleGuardError("AllowedCyclesExceeded"),
SystemSignal("SystemSignal"),
BadErrorHandler("BadErrorHandler"),
KernelError("KernelError"),
InternalKernelError("InternalKernelError"),
is_initialized_(false),
debug_mode_(false),
show_stack_(false),
show_backtrace_(false),
catch_errors_(false),
opt_tailrecursion_(true),
cycle_guard_(false),
call_depth_(0),
max_call_depth_(10),
cycle_count_(0),
cycle_restriction_(0),
verbosity_level_(M_INFO),
system_dict_(0),
user_dict_(0),
status_dict_(0),
error_dict_(0),
parser_(0),
operand_stack_(1000),
execution_stack_(1000),
types_()
{
init();
parser_= new Parser();
}
SLIInterpreter::~SLIInterpreter()
{
for(size_t m=0; m<modules_.size(); ++m)
delete modules_[m];
operand_stack_.clear();
execution_stack_.clear();
dictionary_stack_.clear();
// Types must be deleted *after* all tokens are deleted.
// otherwhise the Token desctructor will crash.
for(size_t t=0; t<types_.size();++t)
delete types_[t];
}
void SLIInterpreter::init()
{
init_types();
init_message_tags();
init_dictionaries();
init_internal_functions();
Token dict(types_[sli3::dictionarytype]);
dict.data_.dict_val=user_dict_;
dictionary_stack_.push(dict);
}
void SLIInterpreter::init_types()
{
types_.resize(num_sli_types,0);
/*
The order in which these types are created must match the
order in which the lables in the enum typeid (sli_type.h) are
defined.
*/
types_[sli3::nulltype]=(new OperatorType<sli3::nulltype>(this,"nulltype"));
types_[sli3::anytype]=(new OperatorType<sli3::anytype>(this,"anytype"));
types_[sli3::integertype]=(new IntegerType(this,"integertype",sli3::integertype));
types_[sli3::doubletype]=(new DoubleType(this,"doubletype",sli3::doubletype));
types_[sli3::booltype]=(new BoolType(this,"booltype",sli3::booltype));
types_[sli3::literaltype]=(new LiteralType(this,"literaltype",sli3::literaltype));
types_[sli3::marktype]=(new MarkType(this,"marktype",sli3::marktype));
types_[sli3::nametype]=(new NameType(this,"nametype",sli3::nametype));
types_[sli3::symboltype]=(new SymbolType(this,"symboltype",sli3::symboltype));
types_[sli3::stringtype]=(new StringType(this,"stringtype",sli3::stringtype));
types_[sli3::arraytype]=(new ArrayType(this,"arraytype",sli3::arraytype));
types_[sli3::litproceduretype]=(new LitprocedureType(this,"litproceduretype",sli3::litproceduretype));
types_[sli3::proceduretype]=(new ProcedureType(this,"proceduretype",sli3::proceduretype));
types_[sli3::dictionarytype]=(new DictionaryType(this,"dictionarytype",sli3::dictionarytype));
types_[sli3::functiontype]=(new FunctionType(this,"functiontype",sli3::functiontype));
types_[sli3::iiteratetype]=(new OperatorType<sli3::iiteratetype>(this,"proc_continue"));
types_[sli3::irepeattype]=(new OperatorType<sli3::irepeattype>(this,"repeat_continue"));
types_[sli3::ifortype]=(new OperatorType<sli3::ifortype>(this,"for_continue"));
types_[sli3::quittype]=(new OperatorType<sli3::quittype>(this,"quit"));
types_[sli3::iforalltype]=(new OperatorType<sli3::iforalltype>(this,"forall_continue"));
types_[sli3::trietype]=(new TrieType(this,"trietype", sli3::trietype));
}
void SLIInterpreter::init_message_tags()
{
message_tag_.clear();
message_tag_.reserve(sli3::num_message_levels);
message_tag_.push_back("M_ALL");
message_tag_.push_back("M_DEBUG");
message_tag_.push_back("M_STATUS");
message_tag_.push_back("M_INFO");
message_tag_.push_back("M_WARNING");
message_tag_.push_back("M_ERROR");
message_tag_.push_back("M_FATAL");
message_tag_.push_back("M_QUIET");
}
void SLIInterpreter::init_dictionaries()
{
system_dict_= new Dictionary();
error_dict_= new Dictionary();
user_dict_= new Dictionary();
status_dict_= new Dictionary();
Token dict(types_[sli3::dictionarytype]);
dict.data_.dict_val=system_dict_;
system_dict_->insert(Name("systemdict"),dict);
dictionary_stack_.push(dict);
dictionary_stack_.set_basedict();
dict.data_.dict_val=error_dict_;
system_dict_->insert(Name("errordict"),dict);
dict.data_.dict_val=user_dict_;
system_dict_->insert(Name("userdict"),dict);
dict.data_.dict_val=status_dict_;
system_dict_->insert(Name("statusdict"),dict);
for (unsigned int t_id=sli3::nulltype; t_id < sli3::symboltype; ++t_id)
{
SLIType *type=types_[t_id];
if(type == 0)
continue;
Name t_name=type->get_typename();
system_dict_->insert(t_name, new_token<sli3::integertype>(t_id));
}
dict.type_=0; // This prevents the token data from being cleared.
}
void SLIInterpreter::init_internal_functions(void)
{
createcommand(iparse_name, &iparsefunction);
createcommand(iparsestdin_name, &iparsestdinfunction);
createcommand(ilookup_name, &ilookupfunction);
createcommand(ipop_name, &ilookupfunction);
createcommand(iiterate_name, &iiteratefunction);
createcommand(iloop_name, &iloopfunction);
system_dict_->insert(irepeat_name, Token(types_[sli3::irepeattype]));
system_dict_->insert(Name("quit"), Token(types_[sli3::quittype]));
system_dict_->insert(iforallarray_name, Token(types_[sli3::iforalltype]));
createcommand(ifor_name, &iforfunction);
createcommand(iforallindexedstring_name,
&iforallindexedstringfunction);
createcommand(iforallindexedarray_name,
&iforallindexedarrayfunction);
createcommand(iforallstring_name,&iforallstringfunction);
createcommand("]", &arraycreatefunction);
// createcommand(">>", &dictcreatefunction);
createdouble(pi_name, numerics::pi);
createdouble(e_name, numerics::e);
init_slicontrol(this);
init_slistack(this);
init_slimath(this);
init_slitypecheck(this);
system_dict_->info(std::cerr);
}
int SLIInterpreter::startup()
{
int exitcode=EXIT_SUCCESS;
if (! is_initialized_ and execution_stack_.load()>0)
{
exitcode=execute_();
is_initialized_=true;
}
return exitcode;
}
void SLIInterpreter::clear_parser_context()
{
if(parser_)
parser_->clear_context();
}
Token SLIInterpreter::read_token(std::istream &in)
{
Token t;
if( not parser_->readToken(*this,in, t))
throw SyntaxError();
return t;
}
Name SLIInterpreter::get_current_name(void) const
{
if(execution_stack_.top().is_of_type(sli3::functiontype))
return execution_stack_.top().data_.func_val->get_name();
// TrieDatum *trie=dynamic_cast<TrieDatum *>(EStack.top().datum());
// if (trie !=NULL)
// return(trie->getname());
return interpreter_name;
}
void SLIInterpreter::raiseerror(Name err)
{
Name caller=get_current_name();
execution_stack_.pop();
raiseerror(caller, err);
}
void SLIInterpreter::raiseerror(char const err[])
{
raiseerror(Name(err));
}
void SLIInterpreter::raiseerror(std::exception &err)
{
Name caller=get_current_name();
Name command_n("command");
assert(error_dict_ != NULL);
error_dict_->insert(command_n,execution_stack_.top()); // store the func/trie that caused the error.
// SLIException provide addtional information
SLIException * slierr =
dynamic_cast<SLIException * >(&err);
if ( slierr )
{
// err is a SLIException
error_dict_->insert(Name("message"), new_token<sli3::stringtype>(slierr->message()));
raiseerror(caller, slierr->what());
}
else
{
// plain std::exception: turn what() output into message
error_dict_->insert(Name("message"), new_token<sli3::stringtype>(std::string(err.what())));
raiseerror(caller, "C++Exception");
}
}
void SLIInterpreter::raiseerror(Name cmd, Name err)
{
// All error related symbols are now in their correct dictionary,
// the error dictionary $errordict ( see Bug #4)
assert(error_dict_ != NULL);
if(error_dict_->lookup(newerror_name)== false)
{
error_dict_->insert(newerror_name, new_token<sli3::booltype>(true));
error_dict_->insert(errorname_name,new_token<sli3::literaltype>(err));
error_dict_->insert(commandname_name,new_token<sli3::literaltype>(cmd));
if(error_dict_->lookup(recordstacks_name)== true)
{
TokenArray old_dict_stack;
dictionary_stack_.toArray(*this, old_dict_stack);
error_dict_->insert(estack_name, new_token<sli3::arraytype>(execution_stack_.toArray()));
error_dict_->insert(ostack_name, new_token<sli3::arraytype>(operand_stack_.toArray()));
error_dict_->insert(dstack_name, new_token<sli3::arraytype>(old_dict_stack));
}
operand_stack_.push(new_token<sli3::literaltype>(cmd));
execution_stack_.push(baselookup(stop_name));
}
else // There might be an error in the error-handler
{
error_dict_->insert(newerror_name,new_token<sli3::booltype>(false));
raiseerror(Name("raiserror"), BadErrorHandler);
return;
}
}
void SLIInterpreter::raiseagain(void)
{
assert(error_dict_ != NULL);
if(error_dict_->known(commandname_name))
{
Token cmd_t =error_dict_->lookup(commandname_name);
error_dict_->insert(newerror_name,new_token<sli3::booltype>(true));
operand_stack_.push(cmd_t);
execution_stack_.push(baselookup(stop_name));
}
else
raiseerror(Name("raiseagain"), BadErrorHandler);
}
void SLIInterpreter::raisesignal(int sig)
{
Name caller=get_current_name();
error_dict_->insert(signo_name, new_token<sli3::integertype>(sig));
raiseerror(caller,SystemSignal);
}
void SLIInterpreter::print_error(Token cmd)
{
// Declare the variables where the information
// about the error is stored.
std::string errorname;
std::ostringstream msg;
// Read errorname from dictionary.
if(error_dict_->known(errorname_name))
{
errorname = std::string(error_dict_->lookup(errorname_name));
}
// Find the correct message for the errorname.
// If errorname is equal to SystemError no message string
// is printed. The if-else branching below follows the
// syntax of the lib/sli/sli-init.sli function
// /:print_error
if(errorname == "SystemError")
{
}
else if(errorname == "BadErrorHandler")
{
msg << ": The error handler of a stopped context "
<< "contained itself an error.";
}
else
{
// Read a pre-defined message from dictionary.
if(error_dict_->known(Name("message")))
{
msg << error_dict_->lookup(Name("message"));
error_dict_->erase(Name("message"));
}
// Print command information for error command.
if(error_dict_->known(Name("command")))
{
Token command = error_dict_->lookup(Name("command"));
error_dict_->erase(Name("command"));
// Command information is only printed if the
// command is of trietype
//if(command.datum() != NULL)
//{
// if(command->gettypename() ==
// Name("trietype"))
// {
// msg << "\n\nCandidates for " << command
// << " are:\n";
// TrieDatum *trie=
// dynamic_cast<TrieDatum *>(command.datum());
// assert(trie != NULL);
// trie->get().info(msg);
// }
//}
}
}
// Error message header is defined as "$errorname in $cmd"
std::string from = std::string(cmd);
// Print error.
message(M_ERROR, from.c_str(), msg.str().c_str(), errorname.c_str());
}
int SLIInterpreter::execute(const std::string &cmdline)
{
int exitcode=startup();
if(exitcode !=EXIT_SUCCESS)
return -1;
operand_stack_.push(new_token<sli3::stringtype>(cmdline));
execution_stack_.push(new_token<sli3::nametype>(Name("evalstring")));
return execute_(); // run the interpreter
}
int SLIInterpreter::execute(int v)
{
startup();
execution_stack_.push(new_token<sli3::quittype>());
execution_stack_.push(new_token<sli3::nametype>(Name("::parsestdin")));
switch(v)
{
case 0:
return execute_(); // run the interpreter
case 1:
return execute_debug_(); // run the interpreter in debug mode
case 2:
return execute_dispatch_();
default:
return -1;
}
}
int SLIInterpreter::execute_(size_t exitlevel)
{
int exitcode=0;
if(sli3::signalflag !=0)
{
return sli3::unknown_error;
}
try
{
do { //loop1 this double loop to keep the try/catch outside the inner loop
try
{
while(!sli3::signalflag and execution_stack_.load() > exitlevel) // loop 2
{
++cycle_count_;
if(cycle_guard_ and cycle_count_ > cycle_restriction_)
{
return 0;
}
execution_stack_.top().execute();
}
}
catch(std::exception &exc)
{
//message(M_FATAL, "SLIInterpreter","A C++ library exception was caught.");
raiseerror(exc);
}
} while(execution_stack_.load() > exitlevel);
}
catch(std::exception &e)
{
message(M_FATAL, "SLIInterpreter","A C++ library exception occured.");
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
message(M_FATAL, "SLIInterpreter",e.what());
terminate(sli3::exception);
}
catch(...)
{
message(M_FATAL, "SLIInterpreter","An unknown c++ exception occured.");
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
terminate(sli3::exception);
}
// Token &exit_tk= status_dict_->lookup(Name("exitcode")); // This throws an exception if the entry is not found.
// exitcode = exit_tk.data_.long_val;
// if (exitcode != 0)
// error_dict_->insert(quitbyerror_name,new_token<sli3::booltype>(true));
return exitcode;
}
int SLIInterpreter::execute_debug_(size_t exitlevel)
{
int exitcode;
if(sli3::signalflag !=0)
{
return sli3::unknown_error;
}
try
{
do { //loop1 this double loop to keep the try/catch outside the inner loop
try
{
while(!sli3::signalflag and execution_stack_.load() > exitlevel) // loop 2
{
++cycle_count_;
if(cycle_guard_ and cycle_count_ > cycle_restriction_)
{
return 0;
}
if(operand_stack_.load()>0)
operand_stack_.dump(std::cerr);
execution_stack_.top().execute();
}
}
catch(std::exception &exc)
{
message(M_ERROR, "SLIInterpreter","A C++ library exception was caught.");
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
message(M_ERROR, "SLIInterpreter",exc.what());
//raiseerror(exc);
execution_stack_.pop();
}
} while(execution_stack_.load() > exitlevel);
}
catch(std::exception &e)
{
message(M_FATAL, "SLIInterpreter","A C++ library exception occured.");
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
message(M_FATAL, "SLIInterpreter",e.what());
terminate(sli3::exception);
}
catch(...)
{
message(M_FATAL, "SLIInterpreter","An unknown c++ exception occured.");
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
terminate(sli3::exception);
}
Token &exit_tk= status_dict_->lookup(Name("exitcode")); // This throws an exception if the entry is not found.
exitcode = exit_tk.data_.long_val;
if (exitcode != 0)
error_dict_->insert(quitbyerror_name,new_token<sli3::booltype>(true));
return exitcode;
}
int SLIInterpreter::execute_dispatch_(size_t)
{
int exitcode=0;
const Name exitcode_name("exitcode");
const Token null_val=new_token<sli3::integertype>(0);
SLIType* iiterate_t=types_[sli3::iiteratetype];
SLIType* proc_type= types_[sli3::proceduretype];
(*status_dict_)[exitcode_name]=null_val;
if(sli3::signalflag !=0)
{
return sli3::unknown_error;
}
try
{
while (true)
{
try
{
++cycle_count_;
/*
- The following switch handles most of the interpreter's internal functions.
- Placing them all in one large piece of code allows the compiler to better optimize
the code.
- The case lables are the type ids which are in strict ascending order. This allows the
compiler to contruct a jump table.
- Not all case lables have break statements, but continue to the next label.
- Some case-lables use gotos to implement loops that depend on the stack contents.
Since we must use break to exit the case-label, we cannot use loops without awkward
rechecks of the loop's exit condition.
- quit is now also implemented as an operator.
*/
switch(execution_stack_.top().type_->get_typeid())
{
/*
We first send all plain data types to the operand stack.
*/
case sli3::integertype:
case sli3::doubletype:
case sli3::booltype:
case sli3::literaltype:
case sli3::marktype:
case sli3::stringtype:
case sli3::arraytype:
case sli3::dictionarytype:
operand_stack_.push(execution_stack_.top());
execution_stack_.pop();
break;
/*
Next we deal with the executable types.
*/
case sli3::nametype:
{
const Token &t=lookup(execution_stack_.top().data_.long_val);
if(t.is_executable())
execution_stack_.top()=t;
else
{
operand_stack_.push(t);
execution_stack_.pop();
}
break;
}
case sli3::trietype:
{
const Token &t=execution_stack_.top().data_.trie_val->lookup(operand_stack_);
if(t.is_executable())
execution_stack_.top()=t;
else
{
operand_stack_.push(t);
execution_stack_.pop();
}
break;
}
case sli3::litproceduretype:
execution_stack_.top().type_=proc_type;
operand_stack_.push(execution_stack_.top());
execution_stack_.pop();
break;
case sli3::functiontype:
execution_stack_.top().data_.func_val->execute(this);
break;
case sli3::proceduretype:
execution_stack_.push(null_val);
execution_stack_.push(iiterate_t);
case sli3::iiteratetype:
{
TokenArray *proc= execution_stack_.pick(2).data_.array_val;
start_iterate:
// pos must be re-assigned in each iteration, because
// Estack().push() may re-allocate its storage in which case
// the reference would be invalidated.
long &pos= execution_stack_.pick(1).data_.long_val;
if(proc->index_is_valid(pos))
{
const Token &t=proc->get(pos++);
if(not t.is_executable())
{
operand_stack_.push(t);
if(not proc->index_is_valid(pos))
{
execution_stack_.pop(3);
break;
}
goto start_iterate;
}
if(not proc->index_is_valid(pos))
{
proc->add_reference();
execution_stack_.pick(2)=t;
proc->remove_reference();
execution_stack_.pop(2);
break;
}
execution_stack_.push(t);
break;
}
// This point is only reached for empty procedures
execution_stack_.pop(3);
break;
}
case sli3::irepeattype:
{
TokenArray *proc= execution_stack_.pick(2).data_.array_val;
start_repeat:
// pos must be re-assigned in each iteration, because
// Estack().push() may re-allocate its storage in which case
// the reference would be invalidated.
long &pos= execution_stack_.pick(1).data_.long_val;
if( proc->index_is_valid(pos))
{
const Token &t=proc->get(pos);
++pos;
if( t.is_executable())
{
execution_stack_.push(t);
break;
}
operand_stack_.push(t);
goto start_repeat; // we must use goto here, so that break exits the case label rather than the while loop.
}
long &lc=execution_stack_.pick(3).data_.long_val;
if( lc > 0 )
{
pos=0; // reset procedure iterator
--lc;
}
else
{
execution_stack_.pop(5);
}
break;
}
case sli3::ifortype:
{
TokenArray *proc= execution_stack_.pick(2).data_.array_val;
start_for:
// pos must be re-assigned in each iteration, because
// Estack().push() may re-allocate its storage in which case
// the reference would be invalidated.
long &pos=execution_stack_.pick(1).data_.long_val;
if(proc->index_is_valid(pos))
{
const Token &t=proc->get(pos);
++pos;
if(t.is_executable())
{
execution_stack_.push(t);
break;
}
operand_stack_.push(t);
goto start_for; // We use goto so that 'break' exits 'case' rather than 'while'
}
long &count=execution_stack_.pick(3).data_.long_val;
long &lim=execution_stack_.pick(4).data_.long_val;
long &inc=execution_stack_.pick(5).data_.long_val;
if(( (inc> 0) && (count <= lim)) ||
( (inc< 0) && (count >= lim)))
{
pos=0; // reset procedure interator
operand_stack_.push(execution_stack_.pick(3)); // push counter to user
count += inc; // then increment it
break;
}
else
execution_stack_.pop(7);
break;
}
case sli3::iforalltype:
{
TokenArray *proc= execution_stack_.pick(2).data_.array_val;
start_forall:
// pos must be re-assigned in each iteration, because
// Estack().push() may re-allocate its storage in which case
// the reference would be invalidated.
long &pos=execution_stack_.pick(1).data_.long_val;
if( proc->index_is_valid(pos))
{
const Token &t= proc->get(pos);
++pos;
if( t.is_executable())
{
execution_stack_.push(t);
break;
}
operand_stack_.push(t);
goto start_forall;
}
TokenArray *ad= execution_stack_.pick(4).data_.array_val;
long &idx=execution_stack_.pick(3).data_.long_val;
if(ad->index_is_valid(idx))
{
pos=0; // reset procedure interator
operand_stack_.push(ad->get(idx)); // push object to user
++idx;
}
else
{
execution_stack_.pop(6);
}
break;
}
case sli3::quittype:
goto exit_interpreter;
default:
execution_stack_.top().execute();
}
}
catch(std::exception &exc)
{
message(M_ERROR, "SLIInterpreter","A C++ library exception was caught.");
message(M_ERROR, "SLIInterpreter",exc.what());
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
//raiseerror(exc);
execution_stack_.pop();
}
}// while(true);
}
catch(std::exception &e)
{
message(M_FATAL, "SLIInterpreter","A C++ library exception occured.");
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
message(M_FATAL, "SLIInterpreter",e.what());
terminate(sli3::exception);
}
catch(...)
{
message(M_FATAL, "SLIInterpreter","An unknown c++ exception occured.");
operand_stack_.dump(std::cerr);
execution_stack_.dump(std::cerr);
terminate(sli3::exception);
}
exit_interpreter:
Token exit_tk=(*status_dict_)["exitcode"];
exitcode = exit_tk.data_.long_val;
if (exitcode != 0)
error_dict_->insert(quitbyerror_name,new_token<sli3::booltype>(true));
return exitcode;
}
void SLIInterpreter::createdouble(Name n, double val)
{
dictionary_stack_.def(n, new_token<sli3::doubletype>(val));
}
/** Define a function in the current dictionary.
* This function defines a SLI function in the current dictionary.
* Note that you may also pass a string as the first argument, as
* there is an implicit type conversion operator from string to Name.
* Use the Name when a name object for this function already
* exists.
*/
void SLIInterpreter::createcommand(Name n, SLIFunction *fn)
{
if ( dictionary_stack_.known(n) )
throw NamingConflict("A function called '" + std::string(n.toString())
+ "' exists already.\n"
"Please choose a different name!");
Token t(types_[sli3::functiontype]);
t.data_.func_val= fn;
fn->set_name(n);
dictionary_stack_.def(n, t);
}
/**
Define a constant in the current dictionary.
This function defines a SLI constant in the current dictionary.
Note that you may also pass a string as the first argument, as
there is an implicit type conversion operator from string to Name.
Use the Name when a name object for this function already
exists.
*/
void SLIInterpreter::createconstant(Name n, Token const & val)
{
dictionary_stack_.def(n, val);
}
void SLIInterpreter::set_verbosity(int l)
{
verbosity_level_ = l;
}
int SLIInterpreter::verbosity(void) const
{
return verbosity_level_;
}
void SLIInterpreter::terminate(int returnvalue)
{
if (returnvalue == -1)
{
returnvalue = sli3::fatal;
}
message(sli3::M_FATAL, "SLIInterpreter","Exiting.");
delete this;
std::exit(returnvalue);
}
void SLIInterpreter::message(int level, const char from[],
const char text[],
const char errorname[]) const
{
#ifdef HAVE_PTHREADS
static Mutex barrier;
barrier.lock(); // Only one thread may write at a time.
#endif
if(level >= verbosity_level_)
{
if (level >= M_FATAL)
{
// Take care that std::cerr and std::cout don't
// send output to the same source. This would
// lead to duplication of the message.
message(std::cout, message_tag_[M_FATAL].c_str(), from, text, errorname);
}
else if (level >= M_ERROR)
{
message(std::cout, message_tag_[M_ERROR].c_str(), from, text, errorname);
}