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#include <windows.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <math.h>
#include "cal_tab.h"
#include "compiler.h"
#include "eval.h"
#define INTCONST 1
#define DBLCONST 2
#define HEXCONST 3
#define VARIABLE 4
#define OTHER 5
int yyparse(char *exp);
void llinit(void);
int gettoken(char *lltb, int lltbsiz);
char yytext[256]="";
char lastVar[256]="";
int *errPtr;
int result;
int colCount=0;
varType *varTable;
char last_error_string[1024];
double globalregs[100];
//------------------------------------------------------------------------------
void *compileExpression(char *exp)
{
int errv=0;
errPtr=&errv;
llinit();
if (!yyparse(exp) && !*errPtr)
{
return (void*)result;
}
return 0;
}
//------------------------------------------------------------------------------
void setLastVar(void)
{
gettoken(lastVar, sizeof lastVar);
}
//------------------------------------------------------------------------------
int setVar(int varNum, double value)
{
int i=varNum;
if (varNum < 0)
{
char *var=lastVar;
if (!_strnicmp(var,"reg",3) && strlen(var) == 5 && isdigit(var[3]) && isdigit(var[4]))
{
int x=atoi(var+3);
if (x < 0 || x > 99) x=0;
i=EVAL_MAX_VARS+x;
}
else
{
for (i=0;i<EVAL_MAX_VARS;i++)
{
if (!varTable[i].name[0] || !_strnicmp(varTable[i].name,lastVar,sizeof(varTable[i].name)))
break;
}
if (i==EVAL_MAX_VARS) return -1;
}
}
if (i < 0 || i >= EVAL_MAX_VARS+100)
{
return -1;
}
if (i >= EVAL_MAX_VARS && i < EVAL_MAX_VARS+100)
{
globalregs[i - EVAL_MAX_VARS]=value;
}
else if (!varTable[i].name[0])
{
strncpy(varTable[i].name,lastVar,sizeof(varTable[i].name));
varTable[i].value = value;
}
return i;
}
//------------------------------------------------------------------------------
int getVar(int varNum)
{
if (varNum >= EVAL_MAX_VARS && varNum < EVAL_MAX_VARS+100)
return createCompiledValue(0, globalregs + (varNum - EVAL_MAX_VARS));
if (varNum >= 0 && varNum < EVAL_MAX_VARS)
return createCompiledValue(0, &(varTable[varNum].value));
return createCompiledValue(0, NULL);
}
#if 0
//------------------------------------------------------------------------------
double *getVarPtr(char *var)
{
int i;
if (!_strnicmp(var,"reg",3) && strlen(var) == 5 && isdigit(var[3]) && isdigit(var[4]))
{
int x=atoi(var+3);
if (x < 0 || x > 99) x=0;
return globalregs + x;
}
for (i=0;i<EVAL_MAX_VARS;i++)
if (!_strnicmp(varTable[i].name, yytext,sizeof(varTable[i].name)))
return &(varTable[i].value);
return NULL;
}
#endif
//------------------------------------------------------------------------------
double *registerVar(char *var)
{
int i;
if (!_strnicmp(var,"reg",3) && strlen(var) == 5 && isdigit(var[3]) && isdigit(var[4]))
{
int x=atoi(var+3);
if (x < 0 || x > 99) x=0;
return globalregs + x;
}
for (i=0;i<EVAL_MAX_VARS;i++)
if (!varTable[i].name[0] ||
!_strnicmp(varTable[i].name,var,sizeof(varTable[i].name)))
break;
if (i==EVAL_MAX_VARS) return NULL;
if (!varTable[i].name[0])
{
strncpy(varTable[i].name,var,sizeof(varTable[i].name));
varTable[i].value = 0.0;
}
return &(varTable[i].value);
}
//------------------------------------------------------------------------------
int translate(int type)
{
int v;
int n;
*yytext = 0;
gettoken(yytext, sizeof yytext);
switch (type)
{
case INTCONST: return createCompiledValue((double)atoi(yytext), NULL);
case DBLCONST: return createCompiledValue((double)atof(yytext), NULL);
case HEXCONST:
v=0;
n=0;
while (1)
{
int a=yytext[n++];
if (a >= '0' && a <= '9') v+=a-'0';
else if (a >= 'A' && a <= 'F') v+=10+a-'A';
else if (a >= 'a' && a <= 'f') v+=10+a-'a';
else break;
v<<=4;
}
return createCompiledValue((double)v, NULL);
}
return 0;
}
//------------------------------------------------------------------------------
int objectId(int nParams)
{
switch (nParams)
{
case 1: return FUNCTION1;
case 2: return FUNCTION2;
case 3: return FUNCTION3;
}
return IDENTIFIER;
}
//------------------------------------------------------------------------------
int lookup(int *typeOfObject)
{
int i;
gettoken(yytext, sizeof yytext);
if (!_strnicmp(yytext,"reg",3) && strlen(yytext) == 5 && isdigit(yytext[3]) && isdigit(yytext[4]) && (i=atoi(yytext+3))>=0 && i<100)
{
*typeOfObject=IDENTIFIER;
return i+EVAL_MAX_VARS;
}
for (i=0;i<EVAL_MAX_VARS;i++)
if (!_strnicmp(varTable[i].name, yytext,sizeof(varTable[i].name)))
{
*typeOfObject = IDENTIFIER;
return i;
}
for (i=0;getFunctionFromTable(i);i++)
{
functionType *f=getFunctionFromTable(i);
if (!strcmpi(f->name, yytext))
{
*typeOfObject = objectId(f->nParams);
return i;
}
}
*typeOfObject = IDENTIFIER;
setLastVar();
i = setVar(-1, 0);
return i;
}
//---------------------------------------------------------------------------
void count(void)
{
gettoken(yytext, sizeof yytext);
colCount+=strlen(yytext);
}
//---------------------------------------------------------------------------
int yyerror(char *txt)
{
*errPtr = colCount;
return 0;
}
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