Auxiliary functions

## Auxiliary functions Auxiliary functions — Variouis auxiliary functions and informations about libenca. |

## Synopsis

    int                 enca_charset_has_ucs2_map           (int charset);
    int                 enca_charset_ucs2_map               (int charset,
                                                             unsigned int *buffer);
    size_t              enca_number_of_charsets             (void);
    const char*         enca_analyser_language              (EncaAnalyser analyser);
    const char**        enca_get_languages                  (size_t *n);
    const char*         enca_language_english_name          (const char *lang);
    int*                enca_get_language_charsets          (const char *langname,
                                                             size_t *n);

## Description

## Details

### enca_charset_has_ucs2_map ()

    int                 enca_charset_has_ucs2_map           (int charset);

Find whether we have charset -> UCS-2 map.

`charset` : | An 8bit charset.
Returns : | Nonzero when the map is available, zero otherwise.

### enca_charset_ucs2_map ()

    int                 enca_charset_ucs2_map               (int charset,
                                                             unsigned int *buffer);

Creates map from an 8bit charset to UCS-2.

The buffer must be at least 256*sizeof(unsigned int) long to hold the map.

`charset` : | An 8bit charset.
`buffer` : | Buffer to store the map to.
Returns : | Nonzero when the map was successfully created, zero otherwise.

### enca_number_of_charsets ()

    size_t              enca_number_of_charsets             (void);

Returns number of known charsets.

Charsets idetifiers are assigned successively starting from zero, so last charset has identifier `enca_number_of_charsets()` - 1.

Returns : | The number of charsets.

### enca_analyser_language ()

    const char*         enca_analyser_language              (EncaAnalyser analyser);

Returns name of language which was `analyser` initialized for.

The returned string must be considered constant and must NOT be freed.

`analyser` : | An analyser.
Returns : | The language name.

### enca_get_languages ()

    const char**        enca_get_languages                  (size_t *n);

Returns list of known languages.

The returned strings are two-letter ISO-639 language codes, the same as `enca_analyser_alloc()` accepts.

The list of languages has to be freed by caller; the strings themselves must be considered constant and must NOT be freed.

`n` : | The number of languages will be stored here.
Returns : | The list of languages, storing their number into *`n`.

### enca_language_english_name ()

    const char*         enca_language_english_name          (const char *lang);

Returns an English name of a language given its ISO-639 code.

The returned string must be considered constant and must NOT be freed.

`lang` : | A two-letter language code, such as obtained from `enca_analyser_language()` or `enca_get_languages()`.
Returns : | The English language name.

### enca_get_language_charsets ()

    int*                enca_get_language_charsets          (const char *langname,
                                                             size_t *n);

Returns list of identifiers of charsets supported for language `language`.

The list of charset identifiers has to be freed by caller.

`langname` : | Two-letter ISO-639 language code.
`n` : | The number of charsets will be stored here.
Returns : | The list of charsets, storing their number into *`n`. When language contains no charsets or `langname` is invalid, NULL is returned and zero stored into *`n`.