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Break code to convert an argument as a percentage into a common function.

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This commit is contained in:
nicm
2020-03-21 13:16:15 +00:00
parent 5aeab5ab40
commit 8828b958f0
4 changed files with 85 additions and 86 deletions
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50
arguments.c
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@ -344,3 +344,53 @@ args_strtonum(struct args *args, u_char ch, long long minval, long long maxval,
*cause = NULL;
return (ll);
}
/* Convert an argument to a number which may be a percentage. */
long long
args_percentage(struct args *args, u_char ch, long long minval,
long long maxval, long long curval, char **cause)
{
const char *errstr;
long long ll;
struct args_entry *entry;
struct args_value *value;
size_t valuelen;
char *copy;
if ((entry = args_find(args, ch)) == NULL) {
*cause = xstrdup("missing");
return (0);
}
value = TAILQ_LAST(&entry->values, args_values);
valuelen = strlen(value->value);
if (value->value[valuelen - 1] == '%') {
copy = xstrdup(value->value);
copy[valuelen - 1] = '\0';
ll = strtonum(copy, 0, 100, &errstr);
free(copy);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
ll = (curval * ll) / 100;
if (ll < minval) {
*cause = xstrdup("too large");
return (0);
}
if (ll > maxval) {
*cause = xstrdup("too small");
return (0);
}
} else {
ll = strtonum(value->value, minval, maxval, &errstr);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
}
*cause = NULL;
return (ll);
}