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20 lines
342 B
C

#include "scan.h"
unsigned int scan_long(const char *src,long *dest) {
register const char *tmp;
register long int l;
register unsigned char c;
int neg;
tmp=src; l=0; neg=0;
switch (*tmp) {
case '-': neg=1;
case '+': ++tmp;
}
while ((c=*tmp-'0')<10) {
l=l*10+c;
++tmp;
}
*dest=(neg?-l:l);
return tmp-src;
}