Parameters

c

The character to unget. [Edit]

stream

The FILE stream to unget c on. [Edit]

Returns

The ungetc() function returns the character pushed-back after the conversion, or Stdlib.EOF if the operation fails. If the value of the argument c character equals Stdlib.EOF, the operation will fail and the stream will remain unchanged. [Edit]

Remarks

The ungetc() function pushes the character c (converted to an unsigned char) back onto the input stream pointed to by stream. The pushed-back characters will be returned by subsequent reads on the stream (in reverse order). A successful intervening call, using the same stream, to one of the file positioning functions (Stdlib.fseek(3), Stdlib.fsetpos(3), or Stdlib.rewind(3)) will discard the pushed back characters.

One character of push-back is guaranteed, but as long as there is sufficient memory, an effectively infinite amount of pushback is allowed.

If a character is successfully pushed-back, the end-of-file indicator for the stream is cleared. The file-position indicator is decremented by each successful call to ungetc(); if its value was 0 before a call, its value is unspecified after the call.

[Edit]

Requirements

Namespace: Mono.Unix.Native
Assembly: Mono.Posix (in Mono.Posix.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0