libc/stdio/fgetws.c

   1 /* Copyright (C) 2004       Manuel Novoa III    <mjn3@codepoet.org>
   2  *
   3  * GNU Library General Public License (LGPL) version 2 or later.
   4  *
   5  * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
   6  */
   7
   8 #include "_stdio.h"
   9
  10
  11
  12 #ifdef __DO_UNLOCKED
  13
  14 wchar_t *fgetws_unlocked(wchar_t *__restrict ws, int n,
  15                                                    FILE *__restrict stream)
  16 {
  17         register wchar_t *p = ws;
  18         wint_t wi;
  19
  20         __STDIO_STREAM_VALIDATE(stream);
  21
  22         while ((n > 1)
  23                    && ((wi = fgetwc_unlocked(stream)) != WEOF)
  24                    && ((*p++ = wi) != '\n')
  25                    ) {
  26                 --n;
  27         }
  28         if (p == ws) {
  29                 /* TODO -- should we set errno? */
  30 /*              if (n <= 0) { */
  31 /*                      errno = EINVAL; */
  32 /*              } */
  33                 return NULL;
  34         }
  35         *p = 0;
  36         return ws;
  37 }
  38 libc_hidden_def(fgetws_unlocked)
  39
  40 #ifndef __UCLIBC_HAS_THREADS__
  41 strong_alias(fgetws_unlocked,fgetws)
  42 #endif
  43
  44 #elif defined __UCLIBC_HAS_THREADS__
  45
  46 wchar_t *fgetws(wchar_t *__restrict ws, int n, FILE *__restrict stream)
  47 {
  48         wchar_t *retval;
  49         __STDIO_AUTO_THREADLOCK_VAR;
  50
  51         __STDIO_AUTO_THREADLOCK(stream);
  52
  53         retval = fgetws_unlocked(ws, n, stream);
  54
  55         __STDIO_AUTO_THREADUNLOCK(stream);
  56
  57         return retval;
  58 }
  59
  60 #endif