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 libc_hidden_proto(fgetws_unlocked)
  11
  12 libc_hidden_proto(fgetwc_unlocked)
  13
  14 #ifdef __DO_UNLOCKED
  15
  16 wchar_t *fgetws_unlocked(wchar_t *__restrict ws, int n,
  17                                                    FILE *__restrict stream)
  18 {
  19         register wchar_t *p = ws;
  20         wint_t wi;
  21
  22         __STDIO_STREAM_VALIDATE(stream);
  23
  24         while ((n > 1)
  25                    && ((wi = fgetwc_unlocked(stream)) != WEOF)
  26                    && ((*p++ = wi) != '\n')
  27                    ) {
  28                 --n;
  29         }
  30         if (p == ws) {
  31                 /* TODO -- should we set errno? */
  32 /*              if (n <= 0) { */
  33 /*                      errno = EINVAL; */
  34 /*              } */
  35                 return NULL;
  36         }
  37         *p = 0;
  38         return ws;
  39 }
  40 libc_hidden_def(fgetws_unlocked)
  41
  42 #ifndef __UCLIBC_HAS_THREADS__
  43 strong_alias(fgetws_unlocked,fgetws)
  44 #endif
  45
  46 #elif defined __UCLIBC_HAS_THREADS__
  47
  48 wchar_t *fgetws(wchar_t *__restrict ws, int n, FILE *__restrict stream)
  49 {
  50         wchar_t *retval;
  51         __STDIO_AUTO_THREADLOCK_VAR;
  52
  53         __STDIO_AUTO_THREADLOCK(stream);
  54
  55         retval = fgetws_unlocked(ws, n, stream);
  56
  57         __STDIO_AUTO_THREADUNLOCK(stream);
  58
  59         return retval;
  60 }
  61
  62 #endif