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parse-util: in parse_permille() check negative earlier

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If 'v' is negative, it's wrong to add the decimal to it, as we'd
actually need to subtract it in this case. But given that we don't want
to allow negative vaues anyway, simply check earlier whether what we
have parsed so far was negative, and react to that before adding the
decimal to it.
This commit is contained in:
Lennart Poettering 2018-07-02 18:50:25 +02:00
parent d68c0833ea
commit 8cbc92d597
1 changed files with 4 additions and 3 deletions
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7
src/basic/parse-util.c
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@ -637,6 +637,8 @@ int parse_permille_unbounded(const char *p) {
r = safe_atoi(n, &v);
if (r < 0)
return r;
if (v < 0)
return -ERANGE;
} else {
pc = endswith(p, "%");
if (!pc)
@ -657,15 +659,14 @@ int parse_permille_unbounded(const char *p) {
r = safe_atoi(n, &v);
if (r < 0)
return r;
if (v < 0)
return -ERANGE;
if (v > (INT_MAX - q) / 10)
return -ERANGE;
v = v * 10 + q;
}
if (v < 0)
return -ERANGE;
return v;
}