xz: Multiple fixes.

The code assumed that printing numbers with thousand separators
and decimal points would always produce only US-ASCII characters.
This was used for buffer sizes (with snprintf(), no overflows)
and aligning columns of the progress indicator and --list. That
assumption was wrong (e.g. LC_ALL=fi_FI.UTF-8 with glibc), so
multibyte character support was added in this commit. The old
way is used if the operating system doesn't have enough multibyte
support (e.g. lacks wcwidth()).

The sizes of buffers were increased to accomodate multibyte
characters. I don't know how big they should be exactly, but
they aren't used for anything critical, so it's not too bad.
If they still aren't big enough, I hopefully get a bug report.
snprintf() takes care of avoiding buffer overflows.

Some static buffers were replaced with buffers allocated on
stack. double_to_str() was removed. uint64_to_str() and
uint64_to_nicestr() now share the static buffer and test
for thousand separator support.

Integrity check names "None" and "Unknown-N" (2 <= N <= 15)
were marked to be translated. I had forgot these, plus they
wouldn't have worked correctly anyway before this commit,
because printing tables with multibyte strings didn't work.

Thanks to Marek Černocký for reporting the bug about
misaligned table columns in --list output.

1 files changed, 0 insertions, 7 deletions

diff --git a/src/xz/util.h b/src/xz/util.h
index 2e08b4a8..fea8cc66 100644
--- a/src/xz/util.h
+++ b/src/xz/util.h
@@ -96,13 +96,6 @@ extern const char *uint64_to_nicestr(uint64_t value,
 		bool always_also_bytes, uint32_t slot);
 
 
-/// \brief      Convert double to a string with one decimal place
-///
-/// This is like uint64_to_str() except that this converts a double and
-/// uses exactly one decimal place.
-extern const char *double_to_str(double value);
-
-
 /// \brief      Wrapper for snprintf() to help constructing a string in pieces
 ///
 /// A maximum of *left bytes is written starting from *pos. *pos and *left