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support for precision in integer format

master
Daniel Kolesa 2017-02-21 18:17:28 +01:00
parent a23a42da1f
commit 2665c20351
1 changed files with 21 additions and 7 deletions
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28
ostd/format.hh
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@ -590,12 +590,22 @@ private:
}
int base = detail::fmt_bases[specn];
if (!val) {
bool zval = !val;
if (zval) {
buf[n++] = '0';
}
for (; val; val /= base) {
buf[n++] = detail::fmt_digits[isp >= 'a'][val % base];
}
size_t tn = n;
if (has_precision()) {
int prec = precision();
if (size_t(prec) > tn) {
tn = size_t(prec);
} else if (!prec && zval) {
tn = 0;
}
}
int fl = flags();
bool lsgn = fl & FMT_FLAG_PLUS;
@ -611,20 +621,24 @@ private:
}
if (!zero) {
write_spaces(writer, n + pfxlen + sign, true, ' ');
write_spaces(writer, tn + pfxlen + sign, true, ' ');
}
if (sign) {
writer.put(neg ? '-' : *((" \0+") + lsgn * 2));
}
range_put_all(writer, string_range{pfx, pfx + pfxlen});
if (zero) {
write_spaces(writer, n + pfxlen + sign, true, '0');
write_spaces(writer, tn + pfxlen + sign, true, '0');
}
for (int i = int(n - 1); i >= 0; --i) {
writer.put(buf[i]);
if (tn) {
for (size_t i = 0; i < (tn - n); ++i) {
writer.put('0');
}
for (size_t i = 0; i < n; ++i) {
writer.put(buf[n - i - 1]);
}
}
write_spaces(writer, n + sign + pfxlen, false);
write_spaces(writer, tn + sign + pfxlen, false);
}
/* floating point */