encodings.h

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#ifndef LH_ENCODINGS_H
#define LH_ENCODINGS_H
 
namespace litehtml
{
 
// https://encoding.spec.whatwg.org/#names-and-labels
enum class encoding
{
    null,  // indicates error or absence of encoding
    utf_8,
 
    // Legacy single-byte encodings; must be in sync with single_byte_indexes
    ibm866,
    iso_8859_2,
    iso_8859_3,
    iso_8859_4,
    iso_8859_5,
    iso_8859_6,
    iso_8859_7,
    iso_8859_8,
    iso_8859_8_i,
    iso_8859_10,
    iso_8859_13,
    iso_8859_14,
    iso_8859_15,
    iso_8859_16,
    koi8_r,
    koi8_u,
    macintosh,
    windows_874,
    windows_1250,
    windows_1251,
    windows_1252,
    windows_1253,
    windows_1254,
    windows_1255,
    windows_1256,
    windows_1257,
    windows_1258,
    x_mac_cyrillic,
 
    // Legacy multi-byte East Asian encodings
    gbk,
    gb18030,
    big5,
    euc_jp,
    iso_2022_jp,
    shift_jis,
    euc_kr,
 
    // Legacy miscellaneous encodings
    replacement,
    utf_16be,
    utf_16le,
    x_user_defined
};
 
// https://html.spec.whatwg.org/multipage/parsing.html#concept-encoding-confidence
enum class confidence // encoding confidence
{
    tentative,
    certain,
    // irrelevant // not used here
};
 
// Used as argument for document::createFromString, parse_html and encoding_sniffing_algorithm.
struct estring : string  // string with encoding
{
    litehtml::encoding encoding;
    litehtml::confidence confidence;
 
    estring(const string& str, litehtml::encoding encoding = encoding::null, litehtml::confidence confidence = confidence::certain)
        : string(str), encoding(encoding), confidence(confidence) {}
 
    estring(const char* str) : string(str), encoding(encoding::null), confidence(confidence::certain) {}
};
 
 
encoding bom_sniff(const string& str);
void encoding_sniffing_algorithm(estring& str);
 
encoding get_encoding(string label);
encoding extract_encoding_from_meta_element(string str);
 
void decode(string input, encoding coding, string& output);
string decode(string input, encoding coding);
 
} // namespace litehtml
 
#endif // LH_ENCODINGS_H