libowfat/scan/scan_whitenskip.c

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#include "scan.h"
#include <ctype.h>
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size_t scan_whitenskip(const char *s,size_t limit) {
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register const char *t=s;
register const char *u=t+limit;
while (t<u && isspace(*t)) ++t;
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return (size_t)(t-s);
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}
#ifdef UNITTEST
#include <assert.h>
int main() {
assert(scan_whitenskip("foo",3)==0);
assert(scan_whitenskip(" foo",4)==1);
assert(scan_whitenskip(" foo",1)==1);
assert(scan_whitenskip(" foo",2)==2);
return 0;
}
#endif