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24 lines
421 B
C
24 lines
421 B
C
#include "scan.h"
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size_t scan_longn(const char *src,size_t n,long *dest) {
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register const char *tmp;
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register long int l;
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register unsigned char c;
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int neg;
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int ok;
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if (!n--) return 0;
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tmp=src; l=0; ok=neg=0;
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switch (*tmp) {
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case '-': neg=1;
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case '+': ++tmp;
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}
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while (n-->0 && (c=*tmp-'0')<10) {
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l=l*10+c;
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++tmp;
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ok=1;
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}
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if (!ok) return 0;
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*dest=(neg?-l:l);
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return tmp-src;
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}
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