Initial import

libc/stdio/fputws.c

@@ -0,0 +1,45 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ This program is free software; you can redistribute it and/or modify         │
+│ it under the terms of the GNU General Public License as published by         │
+│ the Free Software Foundation; version 2 of the License.                      │
+│                                                                              │
+│ This program is distributed in the hope that it will be useful, but          │
+│ WITHOUT ANY WARRANTY; without even the implied warranty of                   │
+│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU             │
+│ General Public License for more details.                                     │
+│                                                                              │
+│ You should have received a copy of the GNU General Public License            │
+│ along with this program; if not, write to the Free Software                  │
+│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
+│ 02110-1301 USA                                                               │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/errno.h"
+#include "libc/stdio/stdio.h"
+
+/**
+ * Writes wide character string to stream.
+ *
+ * Writing stops at the NUL-terminator, which isn't included in output.
+ * This function blocks until the full string is written, unless an
+ * unrecoverable error happens.
+ *
+ * @param s is a NUL-terminated string that's non-NULL
+ * @param f is an open stream
+ * @return strlen(s) or -1 w/ errno on error
+ */
+int fputws(const wchar_t *s, FILE *f) {
+  int res = 0;
+  while (*s) {
+    if (fputwc(*s++, f) == -1) {
+      if (ferror(f) == EINTR) continue;
+      if (feof(f)) errno = f->state = EPIPE;
+      return -1;
+    }
+    ++res;
+  }
+  return ++res;
+}