libc/stdio/fputc.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 #undef fputc
  11 #undef fputc_unlocked
  12 #undef putc
  13 #undef putc_unlocked
  14
  15
  16 #ifdef __DO_UNLOCKED
  17
  18 int __fputc_unlocked(int c, register FILE *stream)
  19 {
  20         __STDIO_STREAM_VALIDATE(stream);
  21
  22         /* First the fast path.  We're good to go if putc macro enabled. */
  23         if (__STDIO_STREAM_CAN_USE_BUFFER_ADD(stream)) {
  24                 __STDIO_STREAM_BUFFER_ADD(stream, ((unsigned char) c));
  25                 return (unsigned char) c;
  26         }
  27
  28         /* Next quickest... writing and narrow oriented, but macro
  29          * disabled and/or buffer is full. */
  30         if (__STDIO_STREAM_IS_NARROW_WRITING(stream)
  31                 || !__STDIO_STREAM_TRANS_TO_WRITE(stream, __FLAG_NARROW)
  32                 ) {
  33                 if (__STDIO_STREAM_IS_FAKE_VSNPRINTF(stream)) {
  34                         return (unsigned char) c;
  35                 }
  36
  37                 if (__STDIO_STREAM_BUFFER_SIZE(stream)) { /* Do we have a buffer? */
  38                         /* The buffer is full and/or the stream is line buffered. */
  39                         if (!__STDIO_STREAM_BUFFER_WAVAIL(stream) /* Buffer full? */
  40                                 && __STDIO_COMMIT_WRITE_BUFFER(stream) /* Commit failed! */
  41                                 ) {
  42                                 goto BAD;
  43                         }
  44
  45                         __STDIO_STREAM_BUFFER_ADD(stream, ((unsigned char) c));
  46
  47                         if (__STDIO_STREAM_IS_LBF(stream)) {
  48                                 if ((((unsigned char) c) == '\n')
  49                                         && __STDIO_COMMIT_WRITE_BUFFER(stream)) {
  50                                         /* Commit failed! */
  51                                         __STDIO_STREAM_BUFFER_UNADD(stream); /* Undo the write! */
  52                                         goto BAD;
  53                                 }
  54                         }
  55                 } else {
  56                         /* NOTE: Do not try to save space by moving uc to the top of
  57                          * the file, as that dramaticly increases runtime. */
  58                         unsigned char uc = (unsigned char) c;
  59                         if (! __stdio_WRITE(stream, &uc, 1)) {
  60                                 goto BAD;
  61                         }
  62                 }
  63                 return (unsigned char) c;
  64         }
  65
  66  BAD:
  67         return EOF;
  68 }
  69 libc_hidden_def(__fputc_unlocked)
  70
  71 strong_alias(__fputc_unlocked,fputc_unlocked)
  72
  73 strong_alias(__fputc_unlocked,putc_unlocked)
  74 #ifndef __UCLIBC_HAS_THREADS__
  75 strong_alias(__fputc_unlocked,fputc)
  76 libc_hidden_def(fputc)
  77
  78 strong_alias(__fputc_unlocked,putc)
  79 #endif
  80
  81 #elif defined __UCLIBC_HAS_THREADS__
  82
  83 int fputc(int c, register FILE *stream)
  84 {
  85         if (stream->__user_locking != 0) {
  86                 return __PUTC_UNLOCKED_MACRO(c, stream);
  87         } else {
  88                 int retval;
  89                 __STDIO_ALWAYS_THREADLOCK(stream);
  90                 retval = __PUTC_UNLOCKED_MACRO(c, stream);
  91                 __STDIO_ALWAYS_THREADUNLOCK(stream);
  92                 return retval;
  93         }
  94 }
  95 libc_hidden_def(fputc)
  96
  97 strong_alias(fputc,putc)
  98
  99 #endif