25 lines
572 B
C
25 lines
572 B
C
#include "pair.h"
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#include <stdint.h>
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#include <errno.h>
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/** @return Constructs `a` and `b` as a pair. */
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struct pair pair(const char *const a, const char *const b) {
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struct pair p;
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p.a = a, p.b = b;
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return p;
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}
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/** Doesn't check anything.
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@return Whether it was able to parse unsigned `p` to `n`. */
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int pair_to_natural(const char *s, const char *const e, uint32_t *const n) {
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uint32_t accum = 0;
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while(s < e) {
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unsigned next = accum * 10 + (unsigned)(*s - '0');
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if(accum >= next) return errno = ERANGE, 0;
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accum = next;
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s++;
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}
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*n = accum;
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return 1;
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}
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