+// Format integer with thousands separator
+const char * format_with_thousands_sep(char * str, int strsize, uint64_t val,
+ const char * thousands_sep /* = 0 */)
+{
+ if (!thousands_sep) {
+ thousands_sep = ",";
+#ifdef HAVE_LOCALE_H
+ setlocale(LC_ALL, "");
+ const struct lconv * currentlocale = localeconv();
+ if (*(currentlocale->thousands_sep))
+ thousands_sep = currentlocale->thousands_sep;
+#endif
+ }
+
+ char num[64];
+ snprintf(num, sizeof(num), "%"PRIu64, val);
+ int numlen = strlen(num);
+
+ int i = 0, j = 0;
+ do
+ str[j++] = num[i++];
+ while (i < numlen && (numlen - i) % 3 != 0 && j < strsize-1);
+ str[j] = 0;
+
+ while (i < numlen && j < strsize-1) {
+ j += snprintf(str+j, strsize-j, "%s%.3s", thousands_sep, num+i);
+ i += 3;
+ }
+
+ return str;
+}
+
+// Format capacity with SI prefixes
+const char * format_capacity(char * str, int strsize, uint64_t val,
+ const char * decimal_point /* = 0 */)
+{
+ if (!decimal_point) {
+ decimal_point = ".";
+#ifdef HAVE_LOCALE_H
+ setlocale(LC_ALL, "");
+ const struct lconv * currentlocale = localeconv();
+ if (*(currentlocale->decimal_point))
+ decimal_point = currentlocale->decimal_point;
+#endif
+ }
+
+ const unsigned factor = 1000; // 1024 for KiB,MiB,...
+ static const char prefixes[] = " KMGTP";
+
+ // Find d with val in [d, d*factor)
+ unsigned i = 0;
+ uint64_t d = 1;
+ for (uint64_t d2 = d * factor; val >= d2; d2 *= factor) {
+ d = d2;
+ if (++i >= sizeof(prefixes)-2)
+ break;
+ }
+
+ // Print 3 digits
+ uint64_t n = val / d;
+ if (i == 0)
+ snprintf(str, strsize, "%u B", (unsigned)n);
+ else if (n >= 100) // "123 xB"
+ snprintf(str, strsize, "%"PRIu64" %cB", n, prefixes[i]);
+ else if (n >= 10) // "12.3 xB"
+ snprintf(str, strsize, "%"PRIu64"%s%u %cB", n, decimal_point,
+ (unsigned)(((val % d) * 10) / d), prefixes[i]);
+ else // "1.23 xB"
+ snprintf(str, strsize, "%"PRIu64"%s%02u %cB", n, decimal_point,
+ (unsigned)(((val % d) * 100) / d), prefixes[i]);
+
+ return str;
+}
+