libc/stdio/puts.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 int puts(register const char * __restrict s)
  12 {
  13         register FILE *stream = stdout; /* This helps bcc optimize. */
  14         int n;
  15         __STDIO_AUTO_THREADLOCK_VAR;
  16
  17         __STDIO_AUTO_THREADLOCK(stream);
  18
  19         /* Note: Don't try to optimize by switching to FBF until the newline.
  20          * If the string itself contained a newline a write error occurred,
  21          * then we could have a newline in the buffer of an LBF stream. */
  22
  23         /* Note: Nonportable as fputs need only return nonnegative on success. */
  24         if ((n = fputs_unlocked(s, stream)) != EOF) {
  25                 ++n;
  26                 if (__fputc_unlocked('\n', stream) == EOF) {
  27                         n = EOF;
  28                 }
  29         }
  30
  31         __STDIO_AUTO_THREADUNLOCK(stream);
  32
  33         return n;
  34 }