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.TH "al_fungetc" "3" "" "Allegro reference manual"
.SH NAME
al_fungetc \- Allegro 5 API
.SH SYNOPSIS
.IP
.EX
#include \f[B]<allegro5/allegro.h>\f[R]

int al_fungetc(ALLEGRO_FILE *f, int c)
.EE
.SH DESCRIPTION
Ungets a single byte from a file.
Pushed\-back bytes are not written to the file, only made available for
subsequent reads, in reverse order.
.PP
The number of pushbacks depends on the backend.
The standard I/O backend only guarantees a single pushback; this depends
on the libc implementation.
.PP
For backends that follow the standard behavior, the pushback buffer will
be cleared after any seeking or writing; also calls to al_fseek(3) and
al_ftell(3) are relative to the number of pushbacks.
If a pushback causes the position to become negative, the behavior of
al_fseek(3) and al_ftell(3) are undefined.
.SH SEE ALSO
al_fgetc(3), al_get_errno(3)