NAME

nl_types.h — data types

SYNOPSIS

#include <nl_types.h>

DESCRIPTION

The <nl_types.h> header shall define at least the following types:

nl_catd

Used by the message catalog functions catopen(), catgets(), and catclose() to identify a catalog descriptor.

nl_item

Used by nl_langinfo() to identify items of langinfo data. Values of objects of type nl_item are defined in <langinfo.h>.

The <nl_types.h> header shall define at least the following symbolic constants:

NL_SETD

Used by gencat when no $set directive is specified in a message text source file. This constant can be passed as the value of set_id on subsequent calls to catgets() (that is, to retrieve messages from the default message set). The value of NL_SETD is implementation-defined.

NL_CAT_LOCALE

Value that can be passed as the oflag argument to catopen() to request that message catalog selection depends on the LC_MESSAGES locale category, rather than directly on the LANG environment variable.

The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.

int       catclose(nl_catd);
char     *catgets(nl_catd, int, int, const char *);
nl_catd   catopen(const char *, int);

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

<langinfo.h>

XSH catclose, catgets, catopen, nl_langinfo

XCU gencat

CHANGE HISTORY

First released in Issue 2.

Issue 7

The <nl_types.h> header is moved from the XSI option to the Base.

This reference page is clarified with respect to macros and symbolic constants.

Issue 8

The description of NL_CAT_LOCALE is updated to eliminate the use of "must".