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librar
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sfasc2ln.c
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1989-02-08
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1KB
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45 lines
/*--------------------------------------*/
/* */
/* SFASC2LNG(X,X) */
/* */
/* Converts bytes from a file to a long */
/* integer. The first argument is the */
/* file descriptor. The second argument */
/* is the number of bytes to read. */
/* */
/*--------------------------------------*/
# include "stdio.h"
long sfasc2lng(fd,a)
int a;
FILE *fd;
{
int j,e,k,w[10],sign,counter;
long r,d;
counter=sign=0;
for (j=0;j<a;j++){
e=scram(getc(fd));
if (!j){
if (e==45)
sign=1;
if (e==45 || e==43)
goto A;
}
w[counter]=e;
counter++;
A: ;
}
r=0L;
for (j=0;j<counter;j++){
d=1L;
for (k=0;k<a-j-1;k++)
d*=10;
if (w[j]==32)
w[j]=48;
r+=d*(w[j]-48);
}
if (sign==1)
r*=-1;
return(r);
}