51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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FUNCTION
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<<fgetc>>---get a character from a file or stream
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INDEX
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fgetc
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ANSI_SYNOPSIS
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#include <stdio.h>
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int fgetc(FILE *<[fp]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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int fgetc(<[fp]>)
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FILE *<[fp]>;
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DESCRIPTION
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Use <<fgetc>> to get the next single character from the file or stream
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identified by <[fp]>. As a side effect, <<fgetc>> advances the file's
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current position indicator.
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For a macro version of this function, see <<getc>>.
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RETURNS
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The next character (read as an <<unsigned char>>, and cast to
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<<int>>), unless there is no more data, or the host system reports a
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read error; in either of these situations, <<fgetc>> returns <<EOF>>.
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You can distinguish the two situations that cause an <<EOF>> result by
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using the <<ferror>> and <<feof>> functions.
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PORTABILITY
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ANSI C requires <<fgetc>>.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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#include <stdio.h>
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int
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_DEFUN (fgetc, (fp),
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FILE * fp)
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{
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int result;
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_flockfile(fp);
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result = __sgetc (fp);
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_funlockfile(fp);
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return result;
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}
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