source: azure_iot_hub/trunk/musl-1.1.18/src/stdio/ungetc.c@ 388

Last change on this file since 388 was 388, checked in by coas-nagasima, 5 years ago

Azure IoT Hub Device C SDK を使ったサンプルの追加
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-csrc
File size: 263 bytes
Line 
1#include "stdio_impl.h"
2
3int ungetc(int c, FILE *f)
4{
5 if (c == EOF) return c;
6
7 FLOCK(f);
8
9 if (!f->rpos) __toread(f);
10 if (!f->rpos || f->rpos <= f->buf - UNGET) {
11 FUNLOCK(f);
12 return EOF;
13 }
14
15 *--f->rpos = c;
16 f->flags &= ~F_EOF;
17
18 FUNLOCK(f);
19 return c;
20}
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