expValue.c
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#include <string.h>
#include <malloc.h>
#include <stdio.h>
#include <expValue.h>
union expType
{
long iVal;
double fVal;
char * cPtr;
};
struct expVal
{
int type;
union expType val;
};
/*
* Constructoren / Destructoren
*/
s_expVal *
expValueIntNew(long val)
{
s_expVal * ret = (s_expVal *)malloc(sizeof(s_expVal));
ret->type = EXP_TYP_INT;
ret->val.iVal = val;
return ret;
}
s_expVal *
expValueFloatNew(double val)
{
s_expVal * ret = (s_expVal *)malloc(sizeof(s_expVal));
ret->type = EXP_TYP_FLOAT;
ret->val.fVal = val;
return ret;
}
s_expVal *
expValueStringNew(char * val)
{
s_expVal * ret = (s_expVal *)malloc(sizeof(s_expVal));
ret->type = EXP_TYP_STRING;
ret->val.cPtr = (char *)malloc(sizeof(char) * (strlen(val) + 1));
strcpy(ret->val.cPtr, val);
return ret;
}
s_expVal *
expValueClone(s_expVal * eVal)
{
s_expVal * ret = (s_expVal *)malloc(sizeof(s_expVal));
ret->type = eVal->type;
switch (eVal->type) {
case EXP_TYP_INT:
ret->val.iVal = eVal->val.iVal; break;
case EXP_TYP_FLOAT:
ret->val.fVal = eVal->val.fVal; break;
case EXP_TYP_STRING:
{
ret->val.cPtr = (char *)malloc(
sizeof(char) * (strlen(eVal->val.cPtr) + 1));
strcpy(ret->val.cPtr, eVal->val.cPtr);
}
}
return ret;
}
void
expValueFree(s_expVal * eVal)
{
if (eVal->type == EXP_TYP_STRING) free(eVal->val.cPtr);
free(eVal);
}
/*
* Accessors
*/
long
expValueInt(s_expVal * eVal)
{
switch (eVal->type) {
case EXP_TYP_INT: return eVal->val.iVal;
case EXP_TYP_FLOAT: return (long)eVal->val.fVal;
case EXP_TYP_STRING: return atoi(eVal->val.cPtr);
}
}
double
expValueFloat(s_expVal * eVal)
{
switch (eVal->type) {
case EXP_TYP_INT: return (double) eVal->val.iVal;
case EXP_TYP_FLOAT: return eVal->val.fVal;
case EXP_TYP_STRING: return atof(eVal->val.cPtr);
}
}
char *
expValueString(s_expVal * eVal)
{
char buf[40];
char * ret = NULL;
switch (eVal->type) {
case EXP_TYP_INT:
sprintf(buf, "%d", eVal->val.iVal);
ret = (char*)malloc(sizeof(char) * (strlen(buf) + 1));
strcpy(ret, buf);
break;
case EXP_TYP_FLOAT:
sprintf(buf, "%f", eVal->val.fVal);
ret = (char*)malloc(sizeof(char) * (strlen(buf) + 1));
strcpy(ret, buf);
break;
case EXP_TYP_STRING:
ret = (char*)malloc(sizeof(char) * (strlen(eVal->val.cPtr) + 1));
strcpy(ret, eVal->val.cPtr);
break;
}
return ret;
}
/*
* analyse expValue
*/
int
expValueGetType(s_expVal * eVal)
{
return eVal->type;
}