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diff --git a/man3p/getc.3p b/man3p/getc.3p new file mode 100644 index 000000000..c745c4548 --- /dev/null +++ b/man3p/getc.3p @@ -0,0 +1,64 @@ +.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved +.TH "GETC" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" getc +.SH NAME +getc \- get a byte from a stream +.SH SYNOPSIS +.LP +\fB#include <stdio.h> +.br +.sp +int getc(FILE *\fP\fIstream\fP\fB); +.br +\fP +.SH DESCRIPTION +.LP +The \fIgetc\fP() function shall be equivalent to \fIfgetc\fP() , except +that if it is implemented as +a macro it may evaluate \fIstream\fP more than once, so the argument +should never be an expression with side effects. +.SH RETURN VALUE +.LP +Refer to \fIfgetc\fP() . +.SH ERRORS +.LP +Refer to \fIfgetc\fP() . +.LP +\fIThe following sections are informative.\fP +.SH EXAMPLES +.LP +None. +.SH APPLICATION USAGE +.LP +If the integer value returned by \fIgetc\fP() is stored into a variable +of type \fBchar\fP and then compared against the +integer constant EOF, the comparison may never succeed, because sign-extension +of a variable of type \fBchar\fP on widening to +integer is implementation-defined. +.LP +Since it may be implemented as a macro, \fIgetc\fP() may treat incorrectly +a \fIstream\fP argument with side effects. In +particular, \fIgetc\fP(*\fIf\fP++) does not necessarily work as expected. +Therefore, use of this function should be preceded by +\fB"#undef getc"\fP in such situations; \fIfgetc\fP() could also be +used. +.SH RATIONALE +.LP +None. +.SH FUTURE DIRECTIONS +.LP +None. +.SH SEE ALSO +.LP +\fIfgetc\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001, +\fI<stdio.h>\fP +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. In the +event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.opengroup.org/unix/online.html . |