47d027ee1a
1. my interpretation of subject sequence definition was wrong. adjust parser to conform to the standard. 2. some code for handling tail overflow case was missing (forgot to finish writing it). 3. typo (= instead of ==) caused ERANGE to wrongly behave like EINVAL
38 lines
712 B
C
38 lines
712 B
C
#include <inttypes.h>
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#include <errno.h>
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#include <ctype.h>
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#include "intparse.h"
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intmax_t strtoimax(const char *s1, char **p, int base)
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{
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const unsigned char *s = (void *)s1;
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struct intparse ip = {0};
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if (p) *p = (char *)s1;
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if (base && base-2U > 34) {
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errno = EINVAL;
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return 0;
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}
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for (; isspace(*s); s++);
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ip.base = base;
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__intparse(&ip, s, SIZE_MAX);
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if (p && ip.err != EINVAL)
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*p = (char *)s + ip.cnt;
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if (ip.err) {
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errno = ip.err;
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if (ip.err == EINVAL) return 0;
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return ip.neg ? INTMAX_MIN : INTMAX_MAX;
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}
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if (ip.val > INTMAX_MAX) {
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if (!ip.neg || -ip.val != INTMAX_MIN)
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errno = ERANGE;
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return ip.neg ? INTMAX_MIN : INTMAX_MAX;
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}
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return ip.neg ? -ip.val : ip.val;
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}
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