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fix minmea_scan("f") overflow

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This commit is contained in:
Kosma Moczek 2014-04-27 17:19:29 +02:00
parent 1e802f6d00
commit 3e3420d1ab
1 changed files with 12 additions and 1 deletions
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13
minmea.c
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@ -148,9 +148,20 @@ bool minmea_scan(const char *sentence, const char *format, ...)
} else if (*field == '-' && !sign && value == -1) { } else if (*field == '-' && !sign && value == -1) {
sign = -1; sign = -1;
} else if (isdigit((unsigned char) *field)) { } else if (isdigit((unsigned char) *field)) {
int digit = *field - '0';
if (value == -1) if (value == -1)
value = 0; value = 0;
value = (10 * value) + (*field - '0'); if (value > (INT_LEAST32_MAX-digit) / 10) {
/* we ran out of bits, what do we do? */
if (scale) {
/* truncate extra precision */
break;
} else {
/* integer overflow. bail out. */
goto parse_error;
}
}
value = (10 * value) + digit;
if (scale) if (scale)
scale *= 10; scale *= 10;
} else if (*field == '.' && scale == 0) { } else if (*field == '.' && scale == 0) {