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program.cpp
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program.cpp
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// program.cpp
// Revision 14-mar-2012
#include "program.h"
#include "keyword.h"
#include "error.h"
#include "sysvar.h"
#include "util.h"
using util::to_string;
#include "trace.h"
#include <string>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cctype>
#include <sstream>
using std::string;
// For debugging.
using std::cerr;
using std::endl;
using std::flush;
#include <cassert>
#define ASSERT assert
#include <string.h>
#ifndef USE_HASH_MAP
#include <map>
#define MAP std::map
#else
#if __GNUC__ < 3
#include <hash_map>
#define N_MAP std
#else
#include <ext/hash_map>
#define N_MAP __gnu_cxx
#endif
#define MAP N_MAP::hash_map
namespace N_MAP {
template <> struct hash <std::string>
{
hash () : hashstr (hash <const char *> () ) { }
size_t operator () (const std::string & str) const
{ return hashstr (str.c_str () ); }
private:
hash <const char *> hashstr;
};
} // namespace N_MAP
#endif
#ifdef __BORLANDC__
#pragma warn -inl
#endif
namespace sysvar= blassic::sysvar;
using namespace blassic::file;
//**********************************************************
// Program
//**********************************************************
Program::Program ()
{
}
Program::~Program ()
{
}
//**********************************************************
// Auxiliar
//**********************************************************
namespace {
typedef size_t Position;
inline BlLineNumber getLineNumber (const BlChar * p)
{
return peek32 (p);
}
inline BlLineNumber getLineNumberAt (const BlChar * p)
{
return peek32 (p);
}
inline void setLineNumber (BlChar * p, BlLineNumber n)
{
poke32 (p, n);
}
inline BlLineLength getLineLength (BlChar * p)
{
return peek32 (p);
}
inline BlLineLength getLineLengthAt (BlChar * p)
{
return peek32 (p + sizeof (BlLineNumber) );
}
inline void setLineLength (BlChar * p, BlLineLength n)
{
poke32 (p, n);
}
inline BlChar * getLineContentAt (BlChar * p)
{
return p + sizeof (BlLineNumber) + sizeof (BlLineLength);
}
inline BlChar * getNextLineAt (BlChar * p)
{
return p + getLineLengthAt (p) +
sizeof (BlLineNumber) + sizeof (BlLineLength);
}
inline void getLineAt (BlChar * p, CodeLine & codeline)
{
codeline.assign (getLineContentAt (p),
getLineNumberAt (p),
getLineLengthAt (p) );
}
// Used in renum.
typedef MAP <BlLineNumber, BlLineNumber> MapLine;
} // namespace
//**********************************************************
// ProgramImpl
//**********************************************************
//#define OLD_LABEL_CACHE
//#define CACHE_ALL_LINES
class ProgramImpl : public Program {
public:
ProgramImpl ();
~ProgramImpl ();
BlChar * programptr () { return program; }
BlLineNumber getlabel (const std::string & str);
CodeLine getfirstline ();
void getnextline (CodeLine & codeline);
void getline (BlLineNumber num, CodeLine & codeline);
void getline (ProgramPos pos, CodeLine & codeline);
void do_insert (const CodeLine & codeline);
void insert (const CodeLine & codeline);
void deletelines (BlLineNumber iniline, BlLineNumber endline);
void listline (const CodeLine & codeline, BlFile & out) const;
void list (BlLineNumber iniline, BlLineNumber endline,
BlFile & out) const;
void save (const std::string & name) const;
void load (const std::string & name);
void load (std::istream & is);
void merge (const std::string & name,
BlLineNumber inidel, BlLineNumber enddel);
void renew ();
void renum (BlLineNumber blnNew, BlLineNumber blnOld,
BlLineNumber blnInc, BlLineNumber blnStop);
private:
BlChar * program;
typedef size_t ProgSize;
ProgSize size;
static const size_t BLOCK= 16 * 1024;
static size_t blockrounded (size_t size);
void resize (ProgSize newsize);
void transfer_content (ProgramImpl & other);
//typedef MAP <BlLineNumber, Position> linecache_t;
typedef MAP <BlLineNumber, BlChar *> linecache_t;
linecache_t linecache;
typedef MAP <string, BlLineNumber> labelcache_t;
labelcache_t labelcache;
public:
// Public to allow use for LabelCacheGuard.
void clear_label_cache ();
private:
void clear_cache ();
#ifndef NDEBUG
size_t linecache_hits;
size_t linecache_fails;
size_t labelcache_hits;
size_t labelcache_fails;
#endif
#ifndef OLD_LABEL_CACHE
bool labelcache_inited;
void generate_label_cache ();
#endif
#ifdef CACHE_ALL_LINES
bool line_cache_inited;
void generate_line_cache ();
#endif
void changeline (Position pos, const MapLine & mapline);
void setlabel (const std::string & label, CodeLine & codeline);
void getlineinpos (Position pos, CodeLine & codeline) const;
CodeLine getlineinpos (Position pos) const;
Position nextline (Position pos) const;
BlLineLength sizeline (Position) const;
BlLineNumber numline (Position pos) const;
const BlChar * linecontent (Position pos) const;
BlChar * linecontent (Position pos);
void loadtext (std::istream & is);
void loadbinary (std::istream & is);
};
ProgramImpl::ProgramImpl () :
program (0),
size (0)
#ifndef NDEBUG
,
linecache_hits (0),
linecache_fails (0),
labelcache_hits (0),
labelcache_fails (0)
#endif
#ifndef OLD_LABEL_CACHE
,
labelcache_inited (false)
#endif
#ifdef CACHE_ALL_LINES
,
line_cache_inited (false)
#endif
{
TRACEFUNC (tr, "ProgramImpl::ProgramImpl");
resize (0);
}
ProgramImpl::~ProgramImpl ()
{
TRACEFUNC (tr, "ProgramImpl::~ProgramImpl");
if (program)
free (program);
#ifndef NDEBUG
std::ostringstream oss;
oss << "Line cache: hits " << linecache_hits <<
", fails " << linecache_fails <<
" Label cache: hits " << labelcache_hits <<
", fails " << labelcache_fails;
TRMESSAGE (tr, oss.str () );
#endif
}
Program * newProgram ()
{
return new ProgramImpl;
}
namespace {
class ProgramTail {
BlLineNumber n;
BlLineLength l;
ProgramTail ()
{
setLineNumber (reinterpret_cast <BlChar *> (& n),
LineEndProgram);
setLineLength (reinterpret_cast <BlChar *> (& l), 0);
}
public:
static const ProgramTail tail;
};
const ProgramTail ProgramTail::tail;
} // namespace
inline size_t ProgramImpl::blockrounded (size_t size)
{
return ( (size + sizeof (ProgramTail) + BLOCK - 1) / BLOCK) * BLOCK;
}
void ProgramImpl::resize (ProgSize newsize)
{
// No need to clear cache here, the callers
// must do it.
ProgSize newblock= blockrounded (newsize);
if (newblock != blockrounded (size) || ! program)
{
BlChar * newprog=
(BlChar *) realloc (program, newblock);
if (! newprog)
throw ErrOutMemory;
program= newprog;
}
size= newsize;
memcpy (program + size, & ProgramTail::tail, sizeof (ProgramTail) );
}
void ProgramImpl::transfer_content (ProgramImpl & other)
{
// No need to clear cache here, the callers
// must do it.
if (this == & other)
{
ASSERT (0);
throw ErrBlassicInternal;
}
program= other.program;
size= other.size;
other.program= NULL;
other.size= 0;
}
void ProgramImpl::renew ()
{
TRACEFUNC (tr, "ProgramImpl::renew");
clear_cache ();
resize (0);
}
inline BlLineLength ProgramImpl::sizeline (Position pos) const
{
BlChar * aux= program + pos + sizeof (BlLineNumber);
return getLineLength (aux);
}
inline Position ProgramImpl::nextline (Position pos) const
{
return pos + sizeline (pos) +
sizeof (BlLineNumber) + sizeof (BlLineLength);
}
inline BlLineNumber ProgramImpl::numline (Position pos) const
{
return getLineNumber (program + pos);
}
inline const BlChar * ProgramImpl::linecontent (Position pos) const
{
return program + pos + sizeof (BlLineNumber) + sizeof (BlLineLength);
}
inline BlChar * ProgramImpl::linecontent (Position pos)
{
return program + pos + sizeof (BlLineNumber) + sizeof (BlLineLength);
}
inline CodeLine ProgramImpl::getfirstline ()
{
//if (size == 0)
// return CodeLine ();
return CodeLine (
//program + sizeof (BlLineNumber) + sizeof (BlLineLength),
linecontent (0),
numline (0), sizeline (0) );
}
inline void ProgramImpl::getnextline (CodeLine & codeline)
{
//if (codeline.number () == 0)
if (codeline.number () == LineDirectCommand)
{
//codeline.assign (0, 0, 0);
codeline.assign (0, LineEndProgram, 0);
return;
}
#if 0
Position pos= codeline.content () - program;
pos+= codeline.length ();
if (pos >= size)
{
//codeline.assign (0, 0, 0);
codeline.assign (0, LineEndProgram, 0);
return;
}
codeline.assign (linecontent (pos), numline (pos), sizeline (pos) );
#else
// Testing a micro optimization.
BlChar * p= const_cast <BlChar *>
(codeline.content () + codeline.length () );
//codeline.assign (p + sizeof (BlLineNumber) + sizeof (BlLineLength),
// getLineNumber (p),
// getLineLength (p + sizeof (BlLineNumber) ) );
getLineAt (p, codeline);
#endif
}
void ProgramImpl::clear_label_cache ()
{
TRACEFUNC (tr, "ProgramImpl::clear_label_cache");
labelcache.clear ();
#ifndef OLD_LABEL_CACHE
labelcache_inited= false;
#endif
}
void ProgramImpl::clear_cache ()
{
TRACEFUNC (tr, "ProgramImpl::clear_cache");
clear_label_cache ();
linecache.clear ();
#ifdef CACHE_ALL_LINES
line_cache_inited= false;
#endif
}
void ProgramImpl::setlabel (const std::string & label,
CodeLine & codeline)
{
BlLineNumber n (codeline.number () );
#if 0
labelcache [label]= n;
#else
std::pair <labelcache_t::iterator, bool> r =
labelcache.insert (std::make_pair (label, n) );
if (! r.second)
{
if (showdebuginfo () )
cerr << "Duplicate label '" << label <<
"' in lines " << r.first->second <<
" and " << n <<
endl;
throw ErrDuplicateLabel;
}
#endif
// Put it in the line number cache, to avoid one search.
#ifndef CACHE_ALL_LINES
//linecache [n]= codeline.content () - program
// - sizeof (BlLineNumber)
// - sizeof (BlLineLength);
linecache [n]= const_cast <BlChar *> (codeline.content () ) -
sizeof (BlLineNumber) - sizeof (BlLineLength);
#endif
}
#ifdef OLD_LABEL_CACHE
inline BlLineNumber ProgramImpl::getlabel (const std::string & label)
{
labelcache_t::iterator it= labelcache.find (label);
if (it != labelcache.end () )
{
#ifndef NDEBUG
++labelcache_hits;
#endif
return it->second;
}
else
{
#ifndef NDEBUG
++labelcache_fails;
#endif
}
CodeLine codeline= getfirstline ();
CodeLine::Token token;
//while (codeline.number () != 0)
while (codeline.number () != LineEndProgram)
{
codeline.gettoken (token);
if (token.code == keyLABEL)
{
codeline.gettoken (token);
if (label == token.str)
{
setlabel (label, codeline);
return codeline.number ();
}
}
getnextline (codeline);
}
//return 0;
return LineEndProgram;
}
#else
// New label cache
namespace {
class LabelCacheGuard {
public:
LabelCacheGuard (ProgramImpl & pin);
~LabelCacheGuard ();
void release ();
private:
ProgramImpl & pi;
bool released;
};
LabelCacheGuard::LabelCacheGuard (ProgramImpl & pin) :
pi (pin),
released (false)
{ }
LabelCacheGuard::~LabelCacheGuard ()
{
if (! released)
pi.clear_label_cache ();
}
void LabelCacheGuard::release ()
{
released= true;
}
} // namespace
void ProgramImpl::generate_label_cache ()
{
TRACEFUNC (tr, "ProgramImpl::generate_label_cache");
LabelCacheGuard guard (* this);
CodeLine codeline= getfirstline ();
CodeLine::Token token;
while (codeline.number () != LineEndProgram)
{
codeline.gettoken (token);
if (token.code == keyLABEL)
{
codeline.gettoken (token);
if (token.code != keyIDENTIFIER)
{
if (showdebuginfo () )
cerr << "Invalid LABEL "
"in line " <<
codeline.number () <<
endl;
throw ErrSyntax;
}
setlabel (token.str, codeline);
}
getnextline (codeline);
}
guard.release ();
labelcache_inited= true;
}
inline BlLineNumber ProgramImpl::getlabel (const std::string & label)
{
if (! labelcache_inited)
{
#ifndef NDEBUG
++labelcache_fails;
#endif
generate_label_cache ();
}
labelcache_t::iterator it= labelcache.find (label);
if (it != labelcache.end () )
{
#ifndef NDEBUG
++labelcache_hits;
#endif
return it->second;
}
else
{
#ifndef NDEBUG
++labelcache_fails;
#endif
//return 0;
return LineEndProgram;
}
}
#endif
#if 0
inline BlLineNumber ProgramImpl::getnextnum (CodeLine & line)
{
if (line.number () == 0)
return 0;
Position pos= line.content () - program;
pos+= line.length ();
if (pos >= size)
return 0;
return numline (pos);
}
#endif
inline void ProgramImpl::getlineinpos (Position pos, CodeLine & codeline)
const
{
codeline.assign (linecontent (pos), numline (pos), sizeline (pos) );
}
CodeLine ProgramImpl::getlineinpos (Position pos) const
{
return CodeLine
(linecontent (pos), numline (pos), sizeline (pos) );
}
#ifdef CACHE_ALL_LINES
void ProgramImpl::generate_line_cache ()
{
TRACEFUNC (tr, "ProgramImpl::generate_line_cache");
//for (Position pos= 0; pos < size; pos= nextline (pos) )
//{
// linecache [numline (pos) ]= pos;
//}
for (BlChar * p= program; ; p= getNextLineAt (p) )
{
BlLineNumber n= getLineNumberAt (p);
linecache [n]= p;
// The end mark is also included in the cache.
if (n > BlMaxLineNumber)
break;
}
line_cache_inited= true;
}
#endif
inline void ProgramImpl::getline (BlLineNumber num, CodeLine & codeline)
{
//TRACEFUNC (tr, "ProgramImpl::getline");
#ifdef CACHE_ALL_LINES
if (! line_cache_inited)
generate_line_cache ();
#endif
//Position pos= 0;
BlChar * p= program;
if (num != LineBeginProgram)
{
#ifndef CACHE_ALL_LINES
linecache_t::iterator it= linecache.find (num);
if (it != linecache.end () )
{
//pos= it->second;
p= it->second;
#ifndef NDEBUG
++linecache_hits;
#endif
}
else
{
#ifndef NDEBUG
++linecache_fails;
//TRMESSAGE (tr, "Line " + to_string (num) +
// " missing in cache");
#endif
//while (pos < size && numline (pos) < num)
// pos= nextline (pos);
//if (pos >= size)
//{
// codeline.assign (0, LineEndProgram, 0);
// return;
//}
while (getLineNumberAt (p) < num)
p= getNextLineAt (p);
//linecache [num]= pos;
linecache [num]= p;
}
#else
linecache_t::iterator it= linecache.lower_bound (num);
// if (it == linecache.end () )
// {
// #ifndef NDEBUG
// ++linecache_fails;
// #endif
// //codeline.assign (0, 0, 0);
// codeline.assign (0, LineEndProgram, 0);
// return;
// }
#ifndef NDEBUG
++linecache_hits;
#endif
//pos= it->second;
p= it->second;
#endif
}
//getlineinpos (pos, codeline);
getLineAt (p, codeline);
}
void ProgramImpl::getline (ProgramPos pos, CodeLine & codeline)
{
BlLineNumber n= pos.getnum ();
getline (n, codeline);
if (codeline.number () == n)
{
BlChunk ch= pos.getchunk ();
if (ch != 0)
codeline.gotochunk (ch);
}
}
void ProgramImpl::do_insert (const CodeLine & codeline)
{
Position pos= 0;
while (pos < size && numline (pos) < codeline.number () )
pos= nextline (pos);
const BlChar * strnew= codeline.content ();
BlLineLength linesize= codeline.length () +
sizeof (BlLineNumber) + sizeof (BlLineLength);
//#define USE_PADDING
#ifdef USE_PADDING
BlLineLength paddedsize= linesize;
unsigned int pad= linesize % 4;
if (pad > 0)
{
pad= 4 - pad;
paddedsize+= pad;
}
#endif
//unsigned long osize= size;
ProgSize newsize= size;
#ifndef USE_PADDING
Position destpos= pos + linesize;
#else
Position destpos= pos + paddedsize;
#endif
Position origpos;
if (pos < size && numline (pos) == codeline.number () )
{
origpos= nextline (pos);
//destpos= pos + sizenew;
newsize+= codeline.length () - sizeline (pos);
//size+= codeline.length () - sizeline (pos);
}
else
{
origpos= pos;
//destpos= pos + sizenew;
#ifndef USE_PADDING
newsize+= linesize;
//size+= linesize;
#else
newsize+= paddedsize;
//size+= paddedsize;
#endif
}
if (destpos > origpos)
{
ASSERT (newsize > size);
//ASSERT (size > osize);
#if 0
size_t newblock= blockrounded (size);
if (newblock != blockrounded (osize) )
{
unsigned char * newprog=
(unsigned char *) realloc (program, newblock);
if (! newprog)
throw ErrOutMemory;
program= newprog;
}
#else
ProgSize osize= size;
resize (newsize);
#endif
if (pos < osize)
{
memmove (program + destpos,
program + origpos,
osize - origpos);
}
}
else if (destpos < origpos)
{
ASSERT (newsize < size);
//ASSERT (size < osize);
memmove (program + destpos,
program + origpos,
size - origpos);
//osize - origpos);
#if 0
size_t newblock= blockrounded (size);
if (newblock != blockrounded (osize) )
{
unsigned char * newprog=
(unsigned char *) realloc (program, newblock);
if (! newprog)
throw ErrOutMemory;
program= newprog;
}
#else
resize (newsize);
#endif
}
setLineNumber (program + pos, codeline.number () );
#ifndef USE_PADDING
setLineLength (program + pos + sizeof (BlLineNumber),
codeline.length () );
#else
setLineLength (program + pos + sizeof (BlLineNumber),
codeline.length () + pad);
#endif
memcpy (linecontent (pos), strnew, codeline.length () );
#ifdef USE_PADDING
if (pad > 0)
memset (linecontent (pos) + codeline.length (), 0, pad);
#endif
}
void ProgramImpl::insert (const CodeLine & codeline)
{
clear_cache ();
do_insert (codeline);
}
void ProgramImpl::deletelines
(BlLineNumber iniline, BlLineNumber endline)
{
TRACEFUNC (tr, "ProgramImpl::deletelines");
if ( (iniline > BlMaxLineNumber && iniline != LineBeginProgram) ||
(endline > BlMaxLineNumber && endline != LineEndProgram) )
{
ASSERT (false);
throw ErrBlassicInternal;
}
if (iniline == LineBeginProgram && endline == LineEndProgram)
{
renew ();
}
else
{
// Evaluate initial position.
Position pos= 0;
if (iniline != LineBeginProgram)
{
while (pos < size && numline (pos) < iniline)
pos= nextline (pos);
}
if (pos >= size)
return;
// Evaluate final position.
Position posend= pos;
while (posend < size && numline (posend) <= endline)
posend= nextline (posend);
if (posend == pos)
return;
#if 0
cout << "Deleting from " << numline (pos) << " to ";
if (posend < size)
cout << "(not including) " << numline (posend);
else
cout << "the end";
cout << endl;
#endif
if (posend < size)
memmove (program + pos,
program + posend,
size - posend);
//size_t osize= size;
//size-= posend - pos;
ProgSize newsize= size - posend + pos;
if (newsize > 0)
{
clear_cache ();
#if 0
size_t newblock= blockrounded (newsize);
if (newblock != blockrounded (size) )
realloc (program, newblock);
#else
resize (newsize);
#endif
}
else
{
renew ();
}
}
}
void ProgramImpl::listline (const CodeLine & codeline, BlFile & out)
const
{
BlLineNumber number= codeline.number ();
BlLineLength linesize= codeline.length ();
out << /*std::setw (7) << */ number << ' ';
const BlChar * aux= codeline.content ();
std::string line;
for (unsigned long i= 0; i < linesize; ++i)
{
unsigned char c= aux [i];
if (c == '\0') // Skip garbage
break;
if (iskey (c) )
{
BlCode s= c;
s<<= 8;
s|= aux [++i];
line+= decodekeyword (s);
}
else if (c == INTEGER_PREFIX)
{
//BlInteger n;
//n= * (BlInteger *) (aux + i + 1);
BlInteger n= peek32 (aux + i + 1);
std::ostringstream oss;
oss << n;
line+= oss.str ();
i+= 4;
}
else if (c == '"')
{
line+= c;
while ( (c= aux [++i]) != 0)
if (c == '"')
line+= "\"\"";
else
line+= c;
line+= '"';
}
else if (c == '\t')
{
const size_t l= line.size ();
line.insert (l, 8 - l % 8, ' ');
}
else
line+= c;
}
out << line;
out.endline ();
}
void ProgramImpl::list
(BlLineNumber iniline, BlLineNumber endline, BlFile & out) const