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-rw-r--r--src/time/wcsftime.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/time/wcsftime.c b/src/time/wcsftime.c
new file mode 100644
index 00000000..7db76922
--- /dev/null
+++ b/src/time/wcsftime.c
@@ -0,0 +1,32 @@
+#include <wchar.h>
+#include <time.h>
+#include <string.h>
+
+size_t wcsftime(wchar_t *wcs, size_t n, const wchar_t *f, const struct tm *tm)
+{
+ size_t k, n0=n;
+ char out[100], in[4];
+ while (*f) {
+ if (!n) return 0;
+ if (*f != '%') {
+ *wcs++ = *f++;
+ n--;
+ continue;
+ }
+ in[2] = in[3] = 0;
+ in[0] = *f++;
+ if (strchr("EO", (in[1]=*f++)))
+ in[2] = *f++;
+ k = strftime(out, sizeof out, in, tm);
+ if (!k) return 0;
+ k = mbsrtowcs(wcs, (const char *[]){out}, n, 0);
+ if (k==(size_t)-1) return 0;
+ wcs += k;
+ n -= k;
+ }
+ if (!n) return 0;
+ *wcs++ = 0;
+ return n0-n;
+}
+
+