How can i optimize the follow function?

[pilafi]

[CODE=c]char start=0;
char isfloat=0;
char tmp_num[10];
int i=0,j=0;
char *end;

memset(tmp_num, 0,10);

end=(*str)+strl en(*str);

while(((*str)++ )<=end)
{
if( isdigit(**str) )

{
start=1;
tmp_num[j] = **str;
j=j+1;
}
if( ispunct(**str) && start==1)

{
isfloat=1;
tmp_num[j] = **str;
j=j+1;
}

if( (**str==' ') || (**str==0) )
{
if(isfloat==1 && start==1)
{
*d=atof(tmp_num );
return 0;
}
if(*(*str+1)==0 )
{
return 1;
}
start=0;
isfloat=0;
j=0;
memset(tmp_num, 0,10);
}

}

return 1;
}[/CODE]


I have large data sets and this functios creates problems because of the isdigit and ispunct function. Do you have any idea to replace them??
Thnx guys!!

[Cucumber]

Well, you can save a call to

memset(tmp_num, 0,10);

using

tmp_num[0]=0;
and doing
tmp_num[j++] = **str;
tmp_num[j]=0;

I dont know whether that would help.

Anyway, try using some optimization flag in your compiler, like -O2 or -O3 and see if your program speed improves.

[pilafi]

I tried to use the optimization flags, but the speed doesnt change. I forgot to give you a detail that this function is a function for getting the next double you find in the file. It works normally, but i have some files with a lot of doubles, really lot and my program crasses in these files. Please help guys!!Thnx!!