| /programs/develop/libraries/kolibri-libc/source/stdio/ungetc.c |
|---|
| 0,0 → 1,28 |
| #include <stdio.h> |
| #include <errno.h> |
| // non standard realization - support for virtually change ONLY ONE char |
| int ungetc(int c, FILE* file) |
| { |
| int res; |
| if(!file){ |
| errno = EBADF; |
| return EOF; |
| } |
| if (file->mode != _STDIO_F_R){ |
| errno = EACCES; |
| return EOF; |
| } |
| if (file->position > file->start_size || file->position == 0 || c == EOF || file->__ungetc_emu_buff != EOF) |
| { |
| errno = EOF; |
| return EOF; |
| } |
| file->__ungetc_emu_buff = c; |
| file->position--; |
| return c; |
| } |