/***************************************************************************
 *
 * monetary.cpp
 *
 * $Id: monetary.cpp 480734 2006-11-29 22:22:44Z sebor $
 *
 ***************************************************************************
 *
 * Licensed to the Apache Software  Foundation (ASF) under one or more
 * contributor  license agreements.  See  the NOTICE  file distributed
 * with  this  work  for  additional information  regarding  copyright
 * ownership.   The ASF  licenses this  file to  you under  the Apache
 * License, Version  2.0 (the  "License"); you may  not use  this file
 * except in  compliance with the License.   You may obtain  a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the  License is distributed on an  "AS IS" BASIS,
 * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
 * implied.   See  the License  for  the  specific language  governing
 * permissions and limitations under the License.
 *
 * Copyright 2001-2006 Rogue Wave Software.
 * 
 **************************************************************************/

#include "def.h"          // for Def
#include "diagnostic.h"   // for issue_diag()
#include "path.h"         // for get_pathname()
#include "scanner.h"      // for scanner

#include <cassert>        // for assert()
#include <climits>        // for CHAR_MAX, CHAR_MIN
#include <cstdlib>        // for strtol()
#include <fstream>        // for ofstream
#include <locale>         // for money_base


static const char lc_name[] = "LC_MONETARY";


void Def::process_monetary ()
{
    issue_diag (I_STAGE, false, 0, "processing %s section\n", lc_name);

    // nesting level
    int nesting_level = 0;

    mon_def_found_ = true;
    
    while ((next = scanner_.next_token ()).token != Scanner::tok_monetary) {

        // set to point to the integer represented as an ordinary char
        // corresponding to p_cs_precedes, p_sep_by_space, p_sign_posn,
        // or one of the n_ (or int_ versions) of the same
        char *pcharint = 0;

        typedef unsigned char UChar;
        long maxval = long (UChar (CHAR_MAX));  // maximum allowed value
        
        switch (next.token) {

        case Scanner::tok_end:
            next = scanner_.next_token();
            if (next.token == Scanner::tok_monetary) {
                // end of monetary block
                if (nesting_level == 0) 
                    return;

                nesting_level--;
                scanner_.close ();
            }
            else
                issue_diag (E_SYNTAX, true, &next,
                            "wrong section name in END directive\n");

            break;

        case Scanner::tok_copy: {
            next = scanner_.next_token();
            if (next.token != Scanner::tok_string)
                issue_diag (E_SYNTAX, true, &next,
                            "expected string following \"copy\" directive\n");

            // bump up the nesting level
            nesting_level++;

            issue_diag (I_STAGE, false, 0, "processing copy directive\n");

            // open the file
            scanner_.open (get_pathname (strip_quotes (next.name), next.file));

            // get comment char and escape char; 
            // these informations are stored by the scanner
            while ((next = scanner_.next_token ()).token 
                   != Scanner::tok_monetary ){
                // the LC_IDENTIFICATION section may also have a 
                // LC_MONETARY token that will mess up the parsing
                if (next.token == Scanner::tok_ident) {
                    while ((next = scanner_.next_token()).token
                           != Scanner::tok_end );
                    next = scanner_.next_token();
                }
            }
            break;
        }

        case Scanner::tok_int_curr_symbol:            
            next = scanner_.next_token();
            mon_st_.int_curr_symbol = convert_string (next.name);
            mon_st_.wint_curr_symbol = convert_wstring (next);
            break;

        case Scanner::tok_currency_symbol:
            next = scanner_.next_token();
            mon_st_.currency_symbol = convert_string (next.name);
            mon_st_.wcurrency_symbol = convert_wstring (next);
            break;

        case Scanner::tok_mon_decimal_point:
            next = scanner_.next_token();
            mon_st_.mon_decimal_point = convert_string (next.name);
            mon_st_.wmon_decimal_point = convert_wstring (next);
            break;

        case Scanner::tok_mon_thousands_sep:
            next = scanner_.next_token();
            mon_st_.mon_thousands_sep = convert_string (next.name);
            mon_st_.wmon_thousands_sep = convert_wstring (next);
            break;

        case Scanner::tok_mon_grouping:
            mon_st_.mon_grouping.clear();
            while ((next = scanner_.next_token()).token != Scanner::tok_nl)
                mon_st_.mon_grouping += std::strtol (next.name.c_str (), 0, 10);
            break;

        case Scanner::tok_positive_sign:
            next = scanner_.next_token();
            mon_st_.positive_sign = convert_string (next.name);
            mon_st_.wpositive_sign = convert_wstring (next);
            break;

        case Scanner::tok_negative_sign:
            next = scanner_.next_token();
            mon_st_.negative_sign = convert_string (next.name);
            mon_st_.wnegative_sign = convert_wstring (next);
            break;

        case Scanner::tok_frac_digits:
            pcharint = &mon_out_.frac_digits [0];
            break;

        case Scanner::tok_int_frac_digits:
            pcharint = &mon_out_.frac_digits [1 /* int'l */ ];
            break;

        case Scanner::tok_p_cs_precedes:
            maxval   = 1;
            pcharint = &mon_out_.p_cs_precedes [0];
            break;

        case Scanner::tok_p_sep_by_space:
            maxval   = 2;
            pcharint = &mon_out_.p_sep_by_space [0];
            break;

        case Scanner::tok_n_cs_precedes:
            maxval   = 1;
            pcharint = &mon_out_.n_cs_precedes [0];
            break;

        case Scanner::tok_n_sep_by_space:
            maxval   = 2;
            pcharint = &mon_out_.n_sep_by_space [0];
            break;

        case Scanner::tok_p_sign_posn:
            maxval   = 4;
            pcharint = &mon_out_.p_sign_posn [0];
            break;

        case Scanner::tok_n_sign_posn:
            maxval   = 4;
            pcharint = &mon_out_.n_sign_posn [0];
            break;

        case Scanner::tok_int_p_cs_precedes:
            maxval   = 1;
            pcharint = &mon_out_.p_cs_precedes [1 /* int'l */ ];
            break;

        case Scanner::tok_int_p_sep_by_space:
            maxval   = 2;
            pcharint = &mon_out_.p_sep_by_space [1 /* int'l */ ];
            break;

        case Scanner::tok_int_n_cs_precedes:
            maxval   = 1;
            pcharint = &mon_out_.n_cs_precedes [1 /* int'l */ ];
            break;

        case Scanner::tok_int_n_sep_by_space:
            maxval   = 2;
            pcharint = &mon_out_.n_sep_by_space [1 /* int'l */ ];
            break;

        case Scanner::tok_int_p_sign_posn:
            maxval   = 4;
            pcharint = &mon_out_.p_sign_posn [1 /* int'l */ ];
            break;

        case Scanner::tok_int_n_sign_posn:
            maxval   = 4;
            pcharint = &mon_out_.n_sign_posn [1 /* int'l */ ];
            break;

        default:
            break;

        }

        if (pcharint) {
            next = scanner_.next_token ();

            char *end = 0;
            const long val = std::strtol (next.name.c_str (), &end, 10);

            if (next.name.empty () || *end || val < -1 || maxval < val) {
                // report as errors values outside the permitted range
                // (-1 indicates an unspecified value for a keyword)
                issue_diag (E_INVAL, true, &next, 
                            "expected integer in [0, %li], got: %s\n",
                            maxval, next.name.c_str ());
            }
            else
                *pcharint = -1 == val ? CHAR_MAX : char (val);
        }
    }
}


void Def::create_format (char format [4],
                         char sign_posn, 
                         char cs_precedes,
                         char sep_by_space,
                         bool is_positive) 
{
    switch (sign_posn) {
        // the international extension is not defined for this locale
    case CHAR_MAX:
        format [0] = CHAR_MAX;
        format [1] = CHAR_MAX;
        format [2] = CHAR_MAX;
        format [3] = CHAR_MAX;
        return;

    case 0:
        // if sign_posn is 0 then we change the sign to "()", if sign is 
        // not the empty string then issue a warning
        if (is_positive) {
            if (!mon_st_.positive_sign.empty())
                warnings_occurred_ = 
                    issue_diag (W_INVAL, false, 0,
                                "invalid combination of positive_sign "
                                "and p_sign_posn.  Ignoring positive_sign")
                    || warnings_occurred_;
            mon_st_.positive_sign = "()";
        }
        else {
            if (!mon_st_.negative_sign.empty())
                warnings_occurred_ = 
                    issue_diag (W_INVAL, false, 0,
                                "invalid combination of negative_sign "
                                "and n_sign_posn.  Ignoring negative_sign")
                    || warnings_occurred_;
            mon_st_.negative_sign = "()";        
        }

        // now construct the format
        format[0] = std::money_base::sign;
        if (cs_precedes == 0) {
            format[1] = std::money_base::value;
            format[2] = std::money_base::symbol;
        }
        else {
            format[1] = std::money_base::symbol;
            format[2] = std::money_base::value;
        }

        break;
    case 1:
        format[0] = std::money_base::sign;
        if (cs_precedes == 0) {
            format[1] = std::money_base::value;
            format[2] = std::money_base::symbol;
        }
        else {
            format[1] = std::money_base::symbol;
            format[2] = std::money_base::value;
        }
        break;
    case 2:
        if (cs_precedes == 0) {
            format[0] = std::money_base::value;
            format[1] = std::money_base::symbol;
        }
        else {
            format[0] = std::money_base::symbol;
            format[1] = std::money_base::value;
        }
        format[2] = std::money_base::sign;
        break;
    case 3:
        if (cs_precedes == 0) {
            format[0] = std::money_base::value;
            format[1] = std::money_base::sign;
            format[2] = std::money_base::symbol;
        }
        else {
            format[0] = std::money_base::sign;
            format[1] = std::money_base::symbol;
            format[2] = std::money_base::value;
        }
        break;
    case 4:
        if (cs_precedes == 0) {
            format[0] = std::money_base::value;
            format[1] = std::money_base::symbol;
            format[2] = std::money_base::sign;
        }
        else {
            format[0] = std::money_base::symbol;
            format[1] = std::money_base::sign;
            format[2] = std::money_base::value;
        }
        break;
    default:
        break;
    }

    // now put the space in the appropriate position
    if (sep_by_space == 0)
        format[3] = std::money_base::none;
    else if (sep_by_space == 1) {
        if (format[0] == std::money_base::value) {
            format[3] = format[2];
            format[2] = format[1];
            format[1] = std::money_base::space;
        }
        else if (format[2] == std::money_base::value) {
            format[3] = format[2];
            format[2] = std::money_base::space;
        }
        else if (format[0] == std::money_base::symbol) {
            format[3] = format[2];
            format[2] = format[1];
            format[1] = std::money_base::space;            
        }
        else {
            format[3] = format[2];
            format[2] = std::money_base::space;            
        }
    }
    else {
        if (format[0] == std::money_base::value) {
            format[3] = format[2];
            format[2] = std::money_base::space;
        }
        else if (format[2] == std::money_base::value) {
            format[3] = format[2];
            format[2] = format[1];
            format[1] = std::money_base::space;        
        }
        else if (format[0] == std::money_base::symbol) {
            format[3] = format[2];
            format[2] = std::money_base::space;            
        }
        else {
            format[3] = format[2];
            format[2] = format[1];
            format[1] = std::money_base::space; 
        }
    }
} 


void Def::write_monetary (std::string dir_name)
{
    assert (!dir_name.empty());

    if (mon_written_)
        return;

    if (!mon_def_found_) {
        issue_diag (I_SKIP, false, 0,
                    "%s section not found, skipping\n", lc_name);
        return;
    }

    // write out all the information in the LC_MONETARY category
    (dir_name += _RWSTD_PATH_SEP) += lc_name;

    issue_diag (I_OPENWR, false, 0, "writing %s\n", dir_name.c_str ());

    std::ofstream out (dir_name.c_str(), std::ios::binary);
    out.exceptions (std::ios::failbit | std::ios::badbit);

    _RW::__rw_punct_t punct;

    // calculate the offsets for the mon_punct structure
    punct.decimal_point_off [1] = 0;

    punct.thousands_sep_off [1] =
          punct.decimal_point_off [1] 
        + (mon_st_.wmon_decimal_point.size () + 1) * sizeof (wchar_t);

    punct.decimal_point_off [0] =
          punct.thousands_sep_off [1]
        + (mon_st_.wmon_thousands_sep.size () + 1) * sizeof (wchar_t);

    punct.thousands_sep_off [0] =
          punct.decimal_point_off [0]
        + mon_st_.mon_decimal_point.size () + 1;

    punct.grouping_off =
          punct.thousands_sep_off [0]
        + mon_st_.mon_thousands_sep.size () + 1;

    punct.punct_ext_off =
          punct.grouping_off
        + mon_st_.mon_grouping.size () + 1;

    // compute the alignment requirement of any offset member
    const std::size_t align = sizeof punct.punct_ext_off;

    // align the offset of the extension struct on the required boundary
    const std::size_t misalign = punct.punct_ext_off % align;

    // compute the amount of padding between the two structs
    const std::size_t pad = misalign ? align - misalign : 0;

    punct.punct_ext_off += pad;

    mon_out_.curr_symbol_off [1][1] = 0;

    mon_out_.curr_symbol_off [0][1] =
          mon_out_.curr_symbol_off [1][1]
        + (mon_st_.wint_curr_symbol.size () + 1) * sizeof (wchar_t);

    mon_out_.positive_sign_off [1] =
          mon_out_.curr_symbol_off [0][1]
        + (mon_st_.wcurrency_symbol.size () + 1) * sizeof (wchar_t);

    mon_out_.negative_sign_off [1] =
          mon_out_.positive_sign_off [1]
        + (mon_st_.wpositive_sign.size () + 1) * sizeof (wchar_t);


    // calculate all the narrow character string offsets
    mon_out_.curr_symbol_off [1][0] =
          mon_out_.negative_sign_off [1]
        + (mon_st_.wnegative_sign.size () + 1) * sizeof (wchar_t);

    mon_out_.curr_symbol_off [0][0] =
          mon_out_.curr_symbol_off [1][0]
        + mon_st_.int_curr_symbol.size () + 1;

    mon_out_.positive_sign_off [0] =
          mon_out_.curr_symbol_off [0][0]
        + mon_st_.currency_symbol.size() + 1;

    mon_out_.negative_sign_off [0] =
          mon_out_.positive_sign_off [0]
        + mon_st_.positive_sign.size () + 1;

    mon_out_.codeset_off =
          mon_out_.negative_sign_off [0]
        + mon_st_.negative_sign.size () + 1;

    mon_out_.charmap_off =
          mon_out_.codeset_off
        + charmap_.get_code_set_name ().size () + 1;

    issue_diag (I_WRITE, false, 0,
                "%s layout:\n"
                "__rw_punct_t {\n"
                "    decimal_point_off[] = { %u, %u }\n"
                "    thousand_sep_off[] = { %u, %u }\n"
                "    grouping_off = %u\n"
                "    ext_off = %u\n"
                "}\n__rw_moneypunct_t {\n"
                "    curr_symbol_off[][] = { { %u, %u }, { %u, %u } }\n"
                "    positive_sign_off[] = { %u, %u }\n"
                "    negative_sign_off[] = { %u, %u }\n"
                "    codeset_off = %u\n"
                "    charmap_off = %u\n"
                "}\n",
                lc_name,
                punct.decimal_point_off [0],
                punct.decimal_point_off [1],
                punct.thousands_sep_off [0],
                punct.thousands_sep_off [1],
                punct.grouping_off,
                punct.punct_ext_off,
                mon_out_.curr_symbol_off [0][0],
                mon_out_.curr_symbol_off [0][1],
                mon_out_.curr_symbol_off [1][0],
                mon_out_.curr_symbol_off [1][1],
                mon_out_.positive_sign_off [0],
                mon_out_.negative_sign_off [1],
                mon_out_.codeset_off,
                mon_out_.charmap_off);

    // construct the pos_format and neg_format
    create_format (mon_out_.pos_format[0], mon_out_.p_sign_posn[0],
                   mon_out_.p_cs_precedes[0], mon_out_.p_sep_by_space[0],
                   true);

    create_format (mon_out_.neg_format[0], mon_out_.n_sign_posn[0],
                   mon_out_.n_cs_precedes[0], mon_out_.n_sep_by_space[0],
                   false);

    create_format (mon_out_.pos_format[1], mon_out_.p_sign_posn[1],
                   mon_out_.p_cs_precedes[1], mon_out_.p_sep_by_space[1],
                   true);

    create_format (mon_out_.neg_format[1], mon_out_.n_sign_posn[1],
                   mon_out_.n_cs_precedes[1], mon_out_.n_sep_by_space[1],
                   false);
        
    // write out the mon_punct structure
    out.write ((char*)&punct, sizeof punct);
        
    // write out the strings in the punct structure
    out.write ((const char*)mon_st_.wmon_decimal_point.c_str(),
               (mon_st_.wmon_decimal_point.size() + 1) * sizeof(wchar_t));
    out.write ((const char*)mon_st_.wmon_thousands_sep.c_str(),
               (mon_st_.wmon_thousands_sep.size() + 1) * sizeof(wchar_t));
        
    out << mon_st_.mon_decimal_point << std::ends
        << mon_st_.mon_thousands_sep << std::ends
        << mon_st_.mon_grouping << std::ends;

    // pad the structure up to the next alignment boundary
    out.write ("\0\0\0\0\0\0\0\0", pad);

    // now write out the monetary offset extension struct
    out.write ((char*)&mon_out_, sizeof (mon_out_));

    // write the wide character strings
    out.write ((const char*)mon_st_.wint_curr_symbol.c_str(),
               (mon_st_.wint_curr_symbol.size() + 1) * sizeof(wchar_t));
    out.write ((const char*)mon_st_.wcurrency_symbol.c_str(),
               (mon_st_.wcurrency_symbol.size() + 1) * sizeof(wchar_t));
    out.write ((const char*)mon_st_.wpositive_sign.c_str(),
               (mon_st_.wpositive_sign.size() + 1) * sizeof(wchar_t));
    out.write ((const char*)mon_st_.wnegative_sign.c_str(),
               (mon_st_.wnegative_sign.size() + 1) * sizeof(wchar_t));

    // write the narrow character strings
    out << mon_st_.int_curr_symbol << std::ends
        << mon_st_.currency_symbol << std::ends
        << mon_st_.positive_sign << std::ends
        << mon_st_.negative_sign << std::ends
        << charmap_.get_code_set_name() << std::ends
        << charmap_.get_charmap_name() << std::ends;
}