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/**
@file      unicode.cpp
@brief     Get Unicode character class ranges and UTF-8 regex translations
@author    Robert van Engelen - engelen@genivia.com
@copyright (c) 2016-2020, Robert van Engelen, Genivia Inc. All rights reserved.
@copyright (c) BSD-3 License - see LICENSE.txt
*/

#include <reflex/unicode.h>
#include <reflex/utf8.h>

namespace reflex {

namespace Unicode {

Tables::Tables()
{
  block_scripts();
  language_scripts();
  letter_scripts();
  composer();

  range["Other"]                  = range["C"];
  range["Letter"]                 = range["L"];
  range["Mark"]                   = range["M"];
  range["Number"]                 = range["N"];
  range["Punctuation"]            = range["P"];
  range["Symbol"]                 = range["S"];
  range["Separator"]              = range["Z"];
  range["Lowercase_Letter"]       = range["Ll"];
  range["Uppercase_Letter"]       = range["Lu"];
  range["Titlecase_Letter"]       = range["Lt"];
  range["Modifier_Letter"]        = range["Lm"];
  range["Other_Letter"]           = range["Lo"];
  range["Non_Spacing_Mark"]       = range["Mn"];
  range["Spacing_Combining_Mark"] = range["Mc"];
  range["Enclosing_Mark"]         = range["Me"];
  range["Space_Separator"]        = range["Zs"];
  range["Line_Separator"]         = range["Zl"];
  range["Paragraph_Separator"]    = range["Zp"];
  range["Math_Symbol"]            = range["Sm"];
  range["Currency_Symbol"]        = range["Sc"];
  range["Modifier_Symbol"]        = range["Sk"];
  range["Other_Symbol"]           = range["So"];
  range["Decimal_Digit_Number"]   = range["Nd"];
  range["Letter_Number"]          = range["Nl"];
  range["Other_Number"]           = range["No"];
  range["Dash_Punctuation"]       = range["Pd"];
  range["Open_Punctuation"]       = range["Ps"];
  range["Close_Punctuation"]      = range["Pe"];
  range["Initial_Punctuation"]    = range["Pi"];
  range["Final_Punctuation"]      = range["Pf"];
  range["Connector_Punctuation"]  = range["Pc"];
  range["Other_Punctuation"]      = range["Po"];
  range["Control"]                = range["Cc"];
  range["Format"]                 = range["Cf"];

  range["Cntrl"] = range["C"];
  range["Digit"] = range["Nd"];
  range["Lower"] = range["Ll"];
  range["Punct"] = range["P"];
  range["Upper"] = range["Lu"];

  range["d"] = range["Digit"];
  range["l"] = range["Lower"];
  range["u"] = range["Upper"];
  range["s"] = range["Space"];
  range["w"] = range["Word"];
}

static const Tables tables;

const int * range(const char *s)
{
  Tables::Range::const_iterator i = tables.range.find(s);
  if (i != tables.range.end())
    return i->second;
  return NULL;
}

int compose(int prev, int next)
{
  Tables::Compose::const_iterator i = tables.compose.find(next);
  if (i != tables.compose.end())
    for (const int *p = i->second; p[0] != 0; p += 2)
      if (p[0] == prev)
        return p[1];
  return -1;
}

} // namespace Unicode

} // namespace reflex
