diff options
Diffstat (limited to 'src/xz/util.c')
| -rw-r--r-- | src/xz/util.c | 89 |
1 files changed, 45 insertions, 44 deletions
diff --git a/src/xz/util.c b/src/xz/util.c index 9f9a8fb0..6ab4c2d7 100644 --- a/src/xz/util.c +++ b/src/xz/util.c @@ -17,9 +17,45 @@ /// Buffers for uint64_to_str() and uint64_to_nicestr() static char bufs[4][128]; -/// Thousand separator support in uint64_to_str() and uint64_to_nicestr() + +// Thousand separator support in uint64_to_str() and uint64_to_nicestr(): +// +// DJGPP 2.05 added support for thousands separators but it's broken +// at least under WinXP with Finnish locale that uses a non-breaking space +// as the thousands separator. Workaround by disabling thousands separators +// for DJGPP builds. +// +// MSVC doesn't support thousand separators. +#if defined(__DJGPP__) || defined(_MSC_VER) +# define FORMAT_THOUSAND_SEP(prefix, suffix) prefix suffix +# define check_thousand_sep(slot) do { } while (0) +#else +# define FORMAT_THOUSAND_SEP(prefix, suffix) ((thousand == WORKS) \ + ? prefix "'" suffix \ + : prefix suffix) + static enum { UNKNOWN, WORKS, BROKEN } thousand = UNKNOWN; +/// Check if thousands separator is supported. Run-time checking is easiest +/// because it seems to be sometimes lacking even on a POSIXish system. +/// Note that trying to use thousands separators when snprintf() doesn't +/// support them results in undefined behavior. This just has happened to +/// work well enough in practice. +/// +/// This must be called before using the FORMAT_THOUSAND_SEP macro. +static void +check_thousand_sep(uint32_t slot) +{ + if (thousand == UNKNOWN) { + bufs[slot][0] = '\0'; + snprintf(bufs[slot], sizeof(bufs[slot]), "%'u", 1U); + thousand = bufs[slot][0] == '1' ? WORKS : BROKEN; + } + + return; +} +#endif + extern void * xrealloc(void *ptr, size_t size) @@ -142,31 +178,6 @@ round_up_to_mib(uint64_t n) } -/// Check if thousands separator is supported. Run-time checking is easiest -/// because it seems to be sometimes lacking even on a POSIXish system. -/// Note that trying to use thousands separators when snprintf() doesn't -/// support them results in undefined behavior. This just has happened to -/// work well enough in practice. -/// -/// DJGPP 2.05 added support for thousands separators but it's broken -/// at least under WinXP with Finnish locale that uses a non-breaking space -/// as the thousands separator. Workaround by disabling thousands separators -/// for DJGPP builds. -static void -check_thousand_sep(uint32_t slot) -{ - if (thousand == UNKNOWN) { - bufs[slot][0] = '\0'; -#ifndef __DJGPP__ - snprintf(bufs[slot], sizeof(bufs[slot]), "%'u", 1U); -#endif - thousand = bufs[slot][0] == '1' ? WORKS : BROKEN; - } - - return; -} - - extern const char * uint64_to_str(uint64_t value, uint32_t slot) { @@ -174,10 +185,8 @@ uint64_to_str(uint64_t value, uint32_t slot) check_thousand_sep(slot); - if (thousand == WORKS) - snprintf(bufs[slot], sizeof(bufs[slot]), "%'" PRIu64, value); - else - snprintf(bufs[slot], sizeof(bufs[slot]), "%" PRIu64, value); + snprintf(bufs[slot], sizeof(bufs[slot]), + FORMAT_THOUSAND_SEP("%", PRIu64), value); return bufs[slot]; } @@ -201,10 +210,8 @@ uint64_to_nicestr(uint64_t value, enum nicestr_unit unit_min, if ((unit_min == NICESTR_B && value < 10000) || unit_max == NICESTR_B) { // The value is shown as bytes. - if (thousand == WORKS) - my_snprintf(&pos, &left, "%'u", (unsigned int)value); - else - my_snprintf(&pos, &left, "%u", (unsigned int)value); + my_snprintf(&pos, &left, FORMAT_THOUSAND_SEP("%", "u"), + (unsigned int)value); } else { // Scale the value to a nicer unit. Unless unit_min and // unit_max limit us, we will show at most five significant @@ -215,21 +222,15 @@ uint64_to_nicestr(uint64_t value, enum nicestr_unit unit_min, ++unit; } while (unit < unit_min || (d > 9999.9 && unit < unit_max)); - if (thousand == WORKS) - my_snprintf(&pos, &left, "%'.1f", d); - else - my_snprintf(&pos, &left, "%.1f", d); + my_snprintf(&pos, &left, FORMAT_THOUSAND_SEP("%", ".1f"), d); } static const char suffix[5][4] = { "B", "KiB", "MiB", "GiB", "TiB" }; my_snprintf(&pos, &left, " %s", suffix[unit]); - if (always_also_bytes && value >= 10000) { - if (thousand == WORKS) - snprintf(pos, left, " (%'" PRIu64 " B)", value); - else - snprintf(pos, left, " (%" PRIu64 " B)", value); - } + if (always_also_bytes && value >= 10000) + snprintf(pos, left, FORMAT_THOUSAND_SEP(" (%", PRIu64 " B)"), + value); return bufs[slot]; } |