langinfo.c File Reference

#include <assert.h>
#include <langinfo.h>
#include <locale.h>
#include <stdint.h>

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Functions
char *	nl_langinfo (nl_item item)

Variables
static const char	c_time []
static const char	c_messages []
static const char	c_numeric []

Function Documentation

nl_langinfo()

char* nl_langinfo

(

nl_item

item

)

The nl_langinfo function can be used to access individual elements of the locale categories. Unlike the localeconv function, which returns all the information, nl_langinfo lets the caller select what information it requires. This is very fast and it is not a problem to call this function multiple times.

A second advantage is that in addition to the numeric and monetary formatting information, information from the LC_TIME and LC_MESSAGES categories is available.

The type item is defined in nl_types.h. The argument item is a numeric value defined in this header.

Definition at line 64 of file langinfo.c.

{
    int cat = item >> 16;
    int idx = item & 65535;
    const char* str;

    if(item == CODESET)
    {
        assert(0 /*"Codeset langinfo not implemented"*/);
        // return loc->cat[LC_CTYPE] ? "UTF-8" : "ASCII";
    }

    /* _NL_LOCALE_NAME extension */
    if(idx == 65535 && cat < LC_ALL)
    {
        assert(0 /*"LOCALE_NAME langinfo not implemented"*/);
        // return loc->cat[cat] ? (char *)loc->cat[cat]->name : "C";
    }

    switch(cat)
    {
        case LC_NUMERIC:
            if(idx > 1)
            {
                return (char*)(uintptr_t) "";
            }
            str = c_numeric;
            break;
        case LC_TIME:
            if(idx > 0x31)
            {
                return (char*)(uintptr_t) "";
            }
            str = c_time;
            break;
        case LC_MONETARY:
            if(idx > 0)
            {
                return (char*)(uintptr_t) "";
            }
            str = "";
            break;
        case LC_MESSAGES:
            if(idx > 3)
            {
                return (char*)(uintptr_t) "";
            }
            str = c_messages;
            break;
        default:
            return (char*)(uintptr_t) "";
    }

    for(; idx; idx--, str++)
    {
        for(; *str; str++)
        {
        }
    }

#if 0
    if (cat != LC_NUMERIC && *str)
    {
        str = LCTRANS(str, cat, loc);
    }
#endif

    return (char*)(uintptr_t)str;
}

References assert, c_messages, c_numeric, c_time, CODESET, LC_ALL, LC_MESSAGES, LC_MONETARY, LC_NUMERIC, and LC_TIME.

Referenced by asctime_r().

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Variable Documentation

c_messages

const char c_messages[]

static

Initial value:

= "^[yY]\0"
                                 "^[nN]\0"
                                 "yes\0"
                                 "no"

Definition at line 57 of file langinfo.c.

Referenced by nl_langinfo().

c_numeric

const char c_numeric[]

static

Initial value:

= ".\0"
                                ""

Definition at line 61 of file langinfo.c.

Referenced by nl_langinfo().

c_time

const char c_time[]

static

Definition at line 6 of file langinfo.c.

Referenced by nl_langinfo().