Translation mode constants

Syntax

#include <fcntl.h>

Remarks

The _O_BINARY, _O_TEXT, _O_WTEXT, _O_U16TEXT, and _O_U8TEXT manifest constants determine the translation mode for files (_open and _sopen) or the translation mode for streams (_setmode).

The allowed values are:

Value	Description
_O_TEXT	Opens file in text (translated) mode. Carriage return-line feed (CR-LF) combinations are translated into a single line feed (LF) on input. Line feed characters are translated into CR-LF combinations on output. Also, CTRL+Z is interpreted as an end-of-file character on input. In files opened for reading, and for reading and writing, fopen checks for CTRL+Z at the end of the file and removes it, if possible. It's removed because using the fseek and ftell functions to move within a file ending with CTRL+Z may cause fseek to behave improperly near the end of the file.
_O_WTEXT	Opens file in UTF16 (translated) mode. The wide-character versions of the text translations of _O_TEXT are supported.
_O_U16TEXT	Opens file in UTF16 no BOM (translated) mode. The wide-character versions of the text translations of _O_TEXT are supported.
_O_U8TEXT	Opens file in UTF8 no BOM (translated) mode. The text translations of _O_TEXT are supported.
_O_BINARY	Opens file in binary (untranslated) mode. The above translations are suppressed.
_O_RAW	Same as _O_BINARY. Supported for C 2.0 compatibility.

For more information, see Text and binary mode file I/O and File translation constants.

See also

_open, _wopen
_pipe
_sopen, _wsopen
_setmode
Global constants