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gzdoom-gles/src/c_expr.cpp
Randy Heit c8cdb52863 - Removed generational garbage collection from the string pool because it didn't 
actually work.
- Turned the list of TabCommands into a TArray because I saw lots of console
  commands in the memory leak report at exit. Then I realized those were actually
  key bindings, so I changed the Bindings and DoubleBindings arrays into FString
  arrays.
- Fixed: FStringCVar was missing a destructor.
- Added TArray::Insert().
- Fixed: TArray::Delete() used memmove().
- Renamed Malloc(), Realloc(), and Calloc() to M_Malloc(), M_Realloc(), and
  M_Calloc() so that the debug versions can be defined as macros.
- Enabled the CRT's memory leak detection in WinMain().
- Moved contents of PO_DeInit() into P_FreeLevelData().
- Removed "PolyBlockMap = NULL;" from P_SetupLevel(), because the P_FreeLevelData()
  call it makes next does the exact same thing, but also freeing it if needed.
- Fixed: Unneeded memcpy in UnpackUserCmd() when ucmd and basis are the same


SVN r75 (trunk)
2006-05-04 03:49:46 +00:00

811 lines
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/*
** c_expr.cpp
** Console commands dealing with mathematical expressions
**
**---------------------------------------------------------------------------
** Copyright 1998-2005 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
// HEADER FILES ------------------------------------------------------------
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "c_dispatch.h"
#include "c_cvars.h"
// MACROS ------------------------------------------------------------------
// TYPES -------------------------------------------------------------------
enum EProductionType
{
PROD_String, PROD_Double
};
struct FProduction
{
EProductionType Type;
};
struct FStringProd : public FProduction
{
char Value[1];
};
struct FDoubleProd : public FProduction
{
double Value;
};
struct FProducer
{
char Token[4];
FProduction *(*DoubleProducer) (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *(*StringProducer) (FStringProd *prod1, FStringProd *prod2);
};
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
bool IsFloat (const char *str);
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
static FProduction *ParseExpression (FCommandLine &argv, int &parsept);
static const char *IsNum (const char *str);
static FStringProd *NewStringProd (const char *str);
static FStringProd *NewStringProd (size_t len);
static FDoubleProd *NewDoubleProd (double val);
static FStringProd *DoubleToString (FProduction *prod);
static FDoubleProd *StringToDouble (FProduction *prod);
void MaybeStringCoerce (FProduction *&prod1, FProduction *&prod2);
void MustStringCoerce (FProduction *&prod1, FProduction *&prod2);
void DoubleCoerce (FProduction *&prod1, FProduction *&prod2);
FProduction *ProdAddDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdAddStr (FStringProd *prod1, FStringProd *prod2);
FProduction *ProdSubDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdMulDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdDivDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdModDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdPowDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdLTDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdLTEDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdGTDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdGTEDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdEqDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdNeqDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdXorDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdAndDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdOrDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdLAndDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdLOrDbl (FDoubleProd *prod1, FDoubleProd *prod2);
FProduction *ProdLTStr (FStringProd *prod1, FStringProd *prod2);
FProduction *ProdLTEStr (FStringProd *prod1, FStringProd *prod2);
FProduction *ProdGTStr (FStringProd *prod1, FStringProd *prod2);
FProduction *ProdGTEStr (FStringProd *prod1, FStringProd *prod2);
FProduction *ProdEqStr (FStringProd *prod1, FStringProd *prod2);
FProduction *ProdNeqStr (FStringProd *prod1, FStringProd *prod2);
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
// PUBLIC DATA DEFINITIONS -------------------------------------------------
// PRIVATE DATA DEFINITIONS ------------------------------------------------
static FProducer Producers[] =
{
{ "+", ProdAddDbl, ProdAddStr },
{ "-", ProdSubDbl, NULL },
{ "*", ProdMulDbl, NULL },
{ "/", ProdDivDbl, NULL },
{ "%", ProdModDbl, NULL },
{ "^", ProdPowDbl, NULL },
{ "<", ProdLTDbl, ProdLTStr },
{ "<=", ProdLTEDbl, ProdLTEStr },
{ ">", ProdGTDbl, ProdGTStr },
{ ">=", ProdGTEDbl, ProdGTEStr },
{ "=", ProdEqDbl, ProdEqStr },
{ "==", ProdEqDbl, ProdEqStr },
{ "!=", ProdNeqDbl, ProdNeqStr },
{ "<>", ProdNeqDbl, ProdNeqStr },
{ "xor", ProdXorDbl, NULL },
{ "&", ProdAndDbl, NULL },
{ "|", ProdOrDbl, NULL },
{ "&&", ProdLAndDbl, NULL },
{ "||", ProdLOrDbl, NULL }
};
// CODE --------------------------------------------------------------------
//==========================================================================
//
// ParseExpression
//
// Builds a production from an expression. The supported syntax is LISP-like
// but without parentheses.
//
//==========================================================================
static FProduction *ParseExpression (FCommandLine &argv, int &parsept)
{
if (parsept >= argv.argc())
return NULL;
const char *token = argv[parsept++];
FProduction *prod1 = NULL, *prod2 = NULL, *prod3 = NULL;
if (IsFloat (token))
{
return NewDoubleProd (atof(token));
}
else if (stricmp (token, "true") == 0)
{
return NewDoubleProd (1.0);
}
else if (stricmp (token, "false") == 0)
{
return NewDoubleProd (0.0);
}
else
{
for (size_t i = 0; i < countof(Producers); ++i)
{
if (strcmp (Producers[i].Token, token) == 0)
{
prod1 = ParseExpression (argv, parsept);
prod2 = ParseExpression (argv, parsept);
if (prod1 == NULL || prod2 == NULL)
{
goto missing;
}
if (Producers[i].StringProducer == NULL)
{
DoubleCoerce (prod1, prod2);
}
else if (Producers[i].DoubleProducer == NULL)
{
MustStringCoerce (prod1, prod2);
}
else
{
MaybeStringCoerce (prod1, prod2);
}
if (prod1->Type == PROD_String)
{
prod3 = Producers[i].StringProducer ((FStringProd *)prod1, (FStringProd *)prod2);
}
else
{
prod3 = Producers[i].DoubleProducer ((FDoubleProd *)prod1, (FDoubleProd *)prod2);
}
goto done;
}
}
if (strcmp ("!", token) == 0)
{
prod1 = ParseExpression (argv, parsept);
if (prod1 == NULL)
{
goto missing;
}
if (prod1->Type == PROD_String)
{
prod1 = StringToDouble (prod1);
}
prod3 = NewDoubleProd (!static_cast<FDoubleProd *>(prod1)->Value);
goto done;
}
return NewStringProd (token);
}
missing:
Printf ("Missing argument to %s\n", token);
done:
if (prod2 != NULL) free (prod2);
if (prod1 != NULL) free (prod1);
return prod3;
}
//==========================================================================
//
// IsFloat
//
//==========================================================================
bool IsFloat (const char *str)
{
const char *pt;
if (*str == '+' || *str == '-')
str++;
if (*str == '.')
{
pt = str;
}
else
{
pt = IsNum (str);
if (pt == NULL)
return false;
}
if (*pt == '.')
{
pt = IsNum (pt+1);
if (pt == NULL)
return false;
}
if (*pt == 'e' || *pt == 'E')
{
pt++;
if (*pt == '+' || *pt == '-')
pt++;
pt = IsNum (pt);
}
return pt != NULL && *pt == 0;
}
//==========================================================================
//
// IsNum
//
//==========================================================================
static const char *IsNum (const char *str)
{
const char *start = str;
while (*str)
{
if (*str >= '0' && *str <= '9')
str++;
else
break;
}
return (str > start) ? str : NULL;
}
//==========================================================================
//
// NewStringProd (from a string)
//
//==========================================================================
static FStringProd *NewStringProd (const char *str)
{
FStringProd *prod = (FStringProd *)M_Malloc (sizeof(FStringProd)+strlen(str));
prod->Type = PROD_String;
strcpy (prod->Value, str);
return prod;
}
//==========================================================================
//
// NewStringProd (from a length)
//
//==========================================================================
static FStringProd *NewStringProd (size_t len)
{
FStringProd *prod = (FStringProd *)M_Malloc (sizeof(FStringProd)+len);
prod->Type = PROD_String;
prod->Value[0] = 0;
return prod;
}
//==========================================================================
//
// NewDoubleProd
//
//==========================================================================
static FDoubleProd *NewDoubleProd (double val)
{
FDoubleProd *prod = (FDoubleProd *)M_Malloc (sizeof(FDoubleProd));
prod->Type = PROD_Double;
prod->Value = val;
return prod;
}
//==========================================================================
//
// DoubleToString
//
//==========================================================================
static FStringProd *DoubleToString (FProduction *prod)
{
char buf[128];
FStringProd *newprod;
sprintf (buf, "%g", static_cast<FDoubleProd *>(prod)->Value);
newprod = NewStringProd (buf);
free (prod);
return newprod;
}
//==========================================================================
//
// StringToDouble
//
//==========================================================================
static FDoubleProd *StringToDouble (FProduction *prod)
{
FDoubleProd *newprod;
newprod = NewDoubleProd (atof (static_cast<FStringProd *>(prod)->Value));
free (prod);
return newprod;
}
//==========================================================================
//
// MaybeStringCoerce
//
// If one of the parameters is a string, convert the other to a string.
//
//==========================================================================
void MaybeStringCoerce (FProduction *&prod1, FProduction *&prod2)
{
if (prod1->Type == PROD_String)
{
if (prod2->Type == PROD_Double)
{
prod2 = DoubleToString (prod2);
}
}
else if (prod2->Type == PROD_String)
{
prod1 = DoubleToString (prod1);
}
}
//==========================================================================
//
// MustStringCoerce
//
// Ensures that both parameters are strings
//
//==========================================================================
void MustStringCoerce (FProduction *&prod1, FProduction *&prod2)
{
if (prod1->Type == PROD_Double)
{
prod1 = DoubleToString (prod1);
}
if (prod2->Type == PROD_Double)
{
prod2 = DoubleToString (prod2);
}
}
//==========================================================================
//
// DoubleCoerce
//
// Ensures that both parameters are doubles
//
//==========================================================================
void DoubleCoerce (FProduction *&prod1, FProduction *&prod2)
{
if (prod1->Type == PROD_String)
{
prod1 = StringToDouble (prod1);
}
if (prod2->Type == PROD_String)
{
prod2 = StringToDouble (prod2);
}
}
//==========================================================================
//
// ProdAddDbl
//
//==========================================================================
FProduction *ProdAddDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value + prod2->Value);
}
//==========================================================================
//
// ProdAddStr
//
//==========================================================================
FProduction *ProdAddStr (FStringProd *prod1, FStringProd *prod2)
{
size_t len = strlen (prod1->Value) + strlen (prod2->Value) + 1;
FStringProd *prod = NewStringProd (len);
strcpy (prod->Value, prod1->Value);
strcat (prod->Value, prod2->Value);
return prod;
}
//==========================================================================
//
// ProdSubDbl
//
//==========================================================================
FProduction *ProdSubDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value - prod2->Value);
}
//==========================================================================
//
// ProdMulDbl
//
//==========================================================================
FProduction *ProdMulDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value * prod2->Value);
}
//==========================================================================
//
// ProdDivDbl
//
//==========================================================================
FProduction *ProdDivDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value / prod2->Value);
}
//==========================================================================
//
// ProdModDbl
//
//==========================================================================
FProduction *ProdModDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (fmod (prod1->Value, prod2->Value));
}
//==========================================================================
//
// ProdPowDbl
//
//==========================================================================
FProduction *ProdPowDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (pow (prod1->Value, prod2->Value));
}
//==========================================================================
//
// ProdLTDbl
//
//==========================================================================
FProduction *ProdLTDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value < prod2->Value);
}
//==========================================================================
//
// ProdLTEDbl
//
//==========================================================================
FProduction *ProdLTEDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value <= prod2->Value);
}
//==========================================================================
//
// ProdGTDbl
//
//==========================================================================
FProduction *ProdGTDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value > prod2->Value);
}
//==========================================================================
//
// ProdGTEDbl
//
//==========================================================================
FProduction *ProdGTEDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value >= prod2->Value);
}
//==========================================================================
//
// ProdEqDbl
//
//==========================================================================
FProduction *ProdEqDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value == prod2->Value);
}
//==========================================================================
//
// ProdNeqDbl
//
//==========================================================================
FProduction *ProdNeqDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd (prod1->Value != prod2->Value);
}
//==========================================================================
//
// ProdLTStr
//
//==========================================================================
FProduction *ProdLTStr (FStringProd *prod1, FStringProd *prod2)
{
return NewDoubleProd (stricmp (prod1->Value, prod2->Value) < 0);
}
//==========================================================================
//
// ProdLTEStr
//
//==========================================================================
FProduction *ProdLTEStr (FStringProd *prod1, FStringProd *prod2)
{
return NewDoubleProd (stricmp (prod1->Value, prod2->Value) <= 0);
}
//==========================================================================
//
// ProdGTStr
//
//==========================================================================
FProduction *ProdGTStr (FStringProd *prod1, FStringProd *prod2)
{
return NewDoubleProd (stricmp (prod1->Value, prod2->Value) > 0);
}
//==========================================================================
//
// ProdGTEStr
//
//==========================================================================
FProduction *ProdGTEStr (FStringProd *prod1, FStringProd *prod2)
{
return NewDoubleProd (stricmp (prod1->Value, prod2->Value) >= 0);
}
//==========================================================================
//
// ProdEqStr
//
//==========================================================================
FProduction *ProdEqStr (FStringProd *prod1, FStringProd *prod2)
{
return NewDoubleProd (stricmp (prod1->Value, prod2->Value) == 0);
}
//==========================================================================
//
// ProdNeqStr
//
//==========================================================================
FProduction *ProdNeqStr (FStringProd *prod1, FStringProd *prod2)
{
return NewDoubleProd (stricmp (prod1->Value, prod2->Value) != 0);
}
//==========================================================================
//
// ProdXorDbl
//
//==========================================================================
FProduction *ProdXorDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd ((double)((__int64)prod1->Value ^ (__int64)prod2->Value));
}
//==========================================================================
//
// ProdAndDbl
//
//==========================================================================
FProduction *ProdAndDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd ((double)((__int64)prod1->Value & (__int64)prod2->Value));
}
//==========================================================================
//
// ProdOrDbl
//
//==========================================================================
FProduction *ProdOrDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd ((double)((__int64)prod1->Value | (__int64)prod2->Value));
}
//==========================================================================
//
// ProdLAndDbl
//
//==========================================================================
FProduction *ProdLAndDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd ((double)((__int64)prod1->Value && (__int64)prod2->Value));
}
//==========================================================================
//
// ProdLOrDbl
//
//==========================================================================
FProduction *ProdLOrDbl (FDoubleProd *prod1, FDoubleProd *prod2)
{
return NewDoubleProd ((double)((__int64)prod1->Value || (__int64)prod2->Value));
}
//==========================================================================
//
//
//
//==========================================================================
//==========================================================================
//
// CCMD test
//
// If <expr> is non-zero, execute <true cmd>.
// If <expr> is zero, execute [false cmd] if specified.
//
//==========================================================================
CCMD (test)
{
int parsept = 1;
FProduction *prod = ParseExpression (argv, parsept);
if (prod == NULL || parsept >= argv.argc())
{
Printf ("Usage: test <expr> <true cmd> [false cmd]\n");
}
else
{
if (prod->Type == PROD_String)
{
prod = StringToDouble (prod);
}
if (static_cast<FDoubleProd *>(prod)->Value != 0.0)
{
AddCommandString (argv[parsept]);
}
else if (++parsept < argv.argc())
{
AddCommandString (argv[parsept]);
}
}
if (prod != NULL)
{
free (prod);
}
}
//==========================================================================
//
// CCMD eval
//
// Evaluates an expression and either prints it to the console or stores
// it in an existing cvar.
//
//==========================================================================
CCMD (eval)
{
if (argv.argc() >= 2)
{
int parsept = 1;
FProduction *prod = ParseExpression (argv, parsept);
if (prod != NULL)
{
if (parsept < argv.argc())
{
FBaseCVar *var = FindCVar (argv[parsept], NULL);
if (var == NULL)
{
Printf ("Unknown variable %s\n", argv[parsept]);
}
else
{
UCVarValue val;
if (prod->Type == PROD_Double)
{
val.Float = (float)static_cast<FDoubleProd *>(prod)->Value;
var->SetGenericRep (val, CVAR_Float);
}
else
{
val.String = static_cast<FStringProd *>(prod)->Value;
var->SetGenericRep (val, CVAR_String);
}
}
}
else
{
if (prod->Type == PROD_Double)
{
Printf ("%g\n", static_cast<FDoubleProd *>(prod)->Value);
}
else
{
Printf ("%s\n", static_cast<FStringProd *>(prod)->Value);
}
}
free (prod);
return;
}
}
Printf ("Usage: eval <expression> [variable]\n");
}
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