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47 lines
655 B
C
47 lines
655 B
C
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/*
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* Ullrich von Bassewitz, 11.08.1998
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*
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* int fgetc (FILE* f);
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*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "_file.h"
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int fgetc (FILE* f)
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{
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char c;
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/* Check if the file is open or if there is an error condition */
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if ((f->f_flags & _FOPEN) == 0 || (f->f_flags & (_FERROR | _FEOF)) != 0) {
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return -1;
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}
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/* Read the byte */
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switch (read (f->f_fd, &c, 1)) {
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case -1:
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/* Error */
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f->f_flags |= _FERROR;
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return -1;
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case 0:
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/* EOF */
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f->f_flags |= _FEOF;
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return -1;
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default:
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/* Char read */
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return ((int) c) & 0xFF;
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}
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}
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