setlocale()

Select a program's locale

#include <locale.h>

char * setlocale( int category, 
                  const char * locale );

Arguments:

category

The part of the environment that you want to set; one of:

• LC_ALL — select the entire locale environment.
• LC_COLLATE — select only the collating sequence.
• LC_CTYPE — select only the character-handling information.
• LC_MESSAGES — specify the language to be used for messages.
• LC_MONETARY — select only monetary formatting information.
• LC_NUMERIC — select only the numeric-format environment.
• LC_TIME — select only the time-related environment.

locale

The locale that you want to use. The following built-in locales are offered:

• C (default)
• C-TRADITIONAL
• POSIX

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The setlocale() function selects a program's locale, according to the specified category and the specified locale.

A locale affects several things:

• The collating sequence (the order in which characters compare with one another) used by strcoll() or wcscoll() .
• The way certain character-handling functions (such as isalnum() and isalpha() ) operate. The wide-character versions include iswalnum() and iswalpha() .
• The decimal-point character used in formatted input/output and string conversion (printf() , scanf() , and friends).
• The format and names used in the string produced by the strftime() and wcsftime() functions.

See the localeconv() function for more information about the locale.

At the start of a program, the default C locale is initialized as if the following call to setlocale() appeared at the start of main() :

(void)setlocale( LC_ALL, "C" );

Returns:

The string associated with the specified category for the new locale, or NULL if an error occurs. This function doesn't change the program's locale when error occurs.

Classification:

ANSI, POSIX 1003.1