Consider d_type=POINT_LONG in the following program.
and data.Long=0xA;
In the following program i am getting correct output in constDataArea[0],constDataArea[1],constDataArea[2], constDataArea[3]
which is oxA, 0x0, 0x0, 0x0.
But not able to write the same into ambi.dat file. Some junk value is inserting in the front.
and writing 5 bytes instead of 4 bytes.
Output file(ambi.dat)is as follows
-----------------
0D 0A 00 00 00
-----------------
Expected output in dat file is
---------------
0A 00 00 00
--------------
What is the error in this code. plz give me suggestion
char *constDataArea;
const size_t BUFSIZE = 1024*1024;
constDataArea=(char *)malloc(BUFSIZE);
size_t datasize=0, nextpos=0, freepos=0;
for(int nv_data=0,indx=0;nv_data<nonVoltleData;nv_data++)
{
switch(d_type)
{
case POINT_BOOL:
data.Bool=(char)tmpbuf[index+2+nv_data+indx];
fprintf(out_fp,"\nBool Data1:%x\n", data.Bool);
datasize=1;
nextpos=freepos+datasize;
memcpy(constDataArea+freepos,(char *)&data.Bool, datasize); /*data.bool から ConstDataArea にコピー*/
freepos=nextpos;
break;
case POINT_CHAR:
data.Char=(char)tmpbuf[index+2+nv_data+indx];
fprintf(out_fp,"\nChar Data1:%x\n", data.Char);
datasize=sizeof(data.Char);
nextpos=freepos+datasize;
memcpy(constDataArea+freepos,(char *)&data.Char, datasize); /*data.Char から ConstDataArea にコピー*/
freepos=nextpos;
break;
case POINT_SHORT:
data.Short=(short)tmpbuf[index+2+nv_data+indx];
fprintf(out_fp,"\nShort Data1:%x\n", data.Short);
datasize=sizeof(data.Short);
if(freepos % sizeof(data.Short))
{
freepos+= sizeof(data.Short)-freepos % sizeof(data.Short);
}
nextpos = freepos + datasize;
fprintf(out_fp,"S:ConstArea:%d\tfreepos:%d\n", constDataArea, freepos);
memcpy(constDataArea+freepos,(char *)&data.Short,datasize); /*data.Short から ConstDataArea にコピー*/
freepos=nextpos;
break;
case POINT_LONG:
data.Long=(long)tmpbuf[index+2+nv_data+indx];
fprintf(out_fp,"\nLong Data1:%x\n", data.Long);
datasize=sizeof(data.Long);
if(freepos % sizeof(data.Long))
{
freepos+= sizeof(data.Long)-freepos % sizeof(data.Long);
}
nextpos=freepos+datasize;
memcpy(constDataArea+freepos,(char *)&data.Long, datasize); /*data.Long から ConstDataArea にコピー*/
freepos=nextpos;
break;
case POINT_FLOAT:
data.Float=*(float*)&tmpbuf[index+2+nv_data+indx];
fprintf(out_fp,"\nFloat Data1:%f\n", data.Float);
datasize=sizeof(data.Float);
if(freepos % sizeof(data.Float))
{
freepos+= sizeof(data.Float)-freepos % sizeof(data.Float);
}
nextpos=freepos+datasize;
memcpy(constDataArea+freepos,(char *)&data.Float, datasize); /*data.Float から ConstDataArea にコピー*/
freepos=nextpos;
break;
case POINT_DOUBLE:
data.Double = *(double*)&tmpbuf[index+2+nv_data+indx];
fprintf(out_fp,"\nDouble Data1:%lf(0x%0x)\n", data.Double, data.Double);
datasize=sizeof(data.Double);
if(freepos % sizeof(data.Double))
{
freepos+= sizeof(data.Double)-freepos % sizeof(data.Double);
}
nextpos=freepos+datasize;
memcpy(constDataArea+freepos,(char *)&data.Double, datasize); /*data.Double から ConstDataArea にコピー*/
freepos=nextpos;
break;
}
}
FILE *f1;
f1=fopen("c:\\ambi.dat", "w");
fwrite(constDataArea, 1,4, f1);
fclose(f1);
printf("\nconst area:0x%x\t0x%x\t0x%x\t0x%x\n\n",constDataArea[0],constDataArea[1],constDataArea[2], constDataArea[3]);
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