/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */

%option yylineno

%{
/*
 * scanner.ll - Lexical scanner for IDLC 1.0
 */

#include <sal/config.h>

#include <stdlib.h>
#include <string.h>

#include <o3tl/safeint.hxx>
#include <o3tl/string_view.hxx>
#include <rtl/character.hxx>

#if defined _MSC_VER
#pragma warning ( push )
// Silence warnings about redefinition of INT8_MIN etc in stdint.h
// The flex-generated workdir/LexTarget/idlc/source/scanner.cxx defines them prior to these includes
#pragma warning ( disable : 4005 )
#endif
#include <idlc.hxx>
#if defined _MSC_VER
#pragma warning ( pop )
#endif
#include <errorhandler.hxx>
#include <fehelper.hxx>

#include "attributeexceptions.hxx"


class AstExpression;
class AstMember;

#include <parser.hxx>

/* handle locations */
static int yycolumn = 1;

#define YY_USER_ACTION idlc()->setOffset(yycolumn, yycolumn+yyleng-1); \
    yycolumn += yyleng;

static sal_Int32       beginLine = 0;
static OString docu;

static int asciiToInteger(char const * s, sal_Int64  * sval, sal_uInt64 * uval) {
    bool neg = false;
    if (*s == '-') {
        neg = true;
        ++s;
    }
    unsigned int base = 10;
    if (*s == '0') {
        base = 8;
        ++s;
        if (*s == 'X' || *s == 'x') {
            base = 16;
            ++s;
        }
    }
    sal_uInt64 val = 0;
    for (; *s != 0; ++s) {
        unsigned int n;
        if (*s >= '0' && *s <= '9') {
            n = *s - '0';
        } else {
            switch (*s) {
            case 'A':
            case 'a':
                n = 10;
                break;
            case 'B':
            case 'b':
                n = 11;
                break;
            case 'C':
            case 'c':
                n = 12;
                break;
            case 'D':
            case 'd':
                n = 13;
                break;
            case 'E':
            case 'e':
                n = 14;
                break;
            case 'F':
            case 'f':
                n = 15;
                break;
            default:
                goto done;
            }
        }
        // The following guarantees the invariant val <= SAL_MAX_UINT64 (because
        // base and n are sufficiently small), *if*
        // std::numeric_limits<sal_uInt64>::max() == SAL_MAX_UINT64:
        sal_uInt64 nval = val * base + n;
        if (nval < val) {
            ErrorHandler::syntaxError(
                PS_NoState, idlc()->getLineNumber(),
                "integral constant too large");
            val = 0;
            break;
        }
        val = nval;
    }
 done:
    if (neg) {
        if (val < SAL_CONST_UINT64(0x8000000000000000)) {
            *sval = -static_cast< sal_Int64 >(val);
        } else if (val == SAL_CONST_UINT64(0x8000000000000000)) {
            *sval = SAL_MIN_INT64;
        } else {
            ErrorHandler::syntaxError(
                PS_NoState, idlc()->getLineNumber(),
                "negative integral constant too large");
            *sval = 0;
        }
        return IDL_INTEGER_LITERAL;
    } else if (val <= o3tl::make_unsigned(SAL_MAX_INT64)) {
        *sval = static_cast< sal_Int64 >(val);
        return IDL_INTEGER_LITERAL;
    } else {
        *uval = val;
        return IDL_INTEGER_ULITERAL;
    }
}

static double asciiToFloat(const char *s)
{
    double      d = 0.0;
    double      e, k;
    sal_Int32   neg = 0;

    if (*s == '-')
    {
        neg = 1;
        s++;
    }
    while (*s >= '0' && *s <= '9')
    {
        d = (d * 10) + *s - '0';
        s++;
    }
    if (*s == '.')
    {
        s++;
        e = 10;
        while (*s >= '0' && *s <= '9')
        {
            d += (*s - '0') / (e * 1.0);
            e *= 10;
            s++;
        }
    }
    if (*s == 'e' || *s == 'E')
    {
        s++;
        if (*s == '-')
        {
            s++;
        } else
        {
            if (*s == '+')
                s++;
            e = 0;
            while (*s >= '0' && *s <= '9')
            {
                e = (e * 10) + *s - '0';
                s++;
            }
            if (e > 0)
            {
                for (k = 1; e > 0; k *= 10, e--)
                    ;
                d /= k;
            }
        }
    }
    if (neg) d *= -1.0;
    return d;
}

static void idlParsePragma(char* pPragma)
{
    OString pragma(pPragma);
    sal_Int32 index = pragma.indexOf("include");
    char* begin = pPragma + index + 8;
    char* offset = begin;
    while (*offset != ',') offset++;
    //OString include = pragma.copy(index + 8, offset - begin);
    //unused// idlc()->insertInclude(pragma.copy(index + 8, (sal_Int32)(offset - begin)));
}   

static void parseLineAndFile(char* pBuf)
{
    char    *r = pBuf;
    char    *h;
    bool    bIsInMain = false;

    /* Skip initial '#' */
    if (*r != '#')
        return;

    /* Find line number */
    for (r++; *r == ' ' || *r == '\t' || rtl::isAsciiAlpha(static_cast<unsigned char>(*r)); r++) ;
    h = r;
    for (; *r != '\0' && *r != ' ' && *r != '\t'; r++) ;
    *r++ = 0;
    idlc()->setLineNumber(sal_uInt32(atol(h)));
    yylineno = atol(h);

    /* Find file name, if present */
    for (; *r != '"'; r++)
    {
        if (*r == '\n' || *r == '\0')
            return;
    }
    h = ++r;
    for (; *r != '"'; r++) ;
    *r = 0;
    if (*h == '\0')
        idlc()->setFileName("standard input");
    else
        idlc()->setFileName(OString(h));

    bIsInMain = idlc()->getFileName() == idlc()->getRealFileName();
    idlc()->setInMainfile(bIsInMain);       
}   

// Suppress any warnings from generated code:
#ifdef __GNUC__
#pragma GCC diagnostic ignored "-Wunused-function"
#pragma GCC diagnostic ignored "-Wunused-label"
#elif defined _MSC_VER
/**/
#ifdef yywrap
#undef  yywrap
#define yywrap() 1
#endif
/**/
#endif
#define YY_NO_UNISTD_H
%}

%option noyywrap
%option never-interactive

%x DOCU
%x COMMENT

DIGIT           [0-9]
OCT_DIGIT       [0-7]
HEX_DIGIT       [a-fA-F0-9]
CAPITAL         [A-Z]
ALPHA           [a-zA-Z]
INT_LITERAL     [1-9][0-9]*
OCT_LITERAL     0{OCT_DIGIT}*
HEX_LITERAL     (0x|0X){HEX_DIGIT}*

IDENTIFIER_NEW  ({ALPHA}({ALPHA}|{DIGIT})*)|({CAPITAL}("_"?({ALPHA}|{DIGIT})+)*)
IDENTIFIER      ("_"?({ALPHA}|{DIGIT})+)*

%%

[ \t\r]+    ; /* eat up whitespace */
[\n]           {
       idlc()->incLineNumber();
       yycolumn = 1;
       yylineno++;
}

attribute       return IDL_ATTRIBUTE;
bound           return IDL_BOUND;
const           return IDL_CONST;
constants       return IDL_CONSTANTS;
constrained     return IDL_CONSTRAINED;
enum            return IDL_ENUM;
exception       return IDL_EXCEPTION;
interface       return IDL_INTERFACE;
maybeambiguous  return IDL_MAYBEAMBIGUOUS;
maybedefault    return IDL_MAYBEDEFAULT;
maybevoid       return IDL_MAYBEVOID;
module          return IDL_MODULE;
needs           return IDL_NEEDS;
observes        return IDL_OBSERVES;
optional        return IDL_OPTIONAL;
property        return IDL_PROPERTY;
raises          return IDL_RAISES;
readonly        return IDL_READONLY;
removable       return IDL_REMOVABLE;
service         return IDL_SERVICE;
sequence        return IDL_SEQUENCE;
singleton       return IDL_SINGLETON;
struct          return IDL_STRUCT;
transient       return IDL_TRANSIENT;
typedef         return IDL_TYPEDEF;

any             return IDL_ANY;             
boolean         return IDL_BOOLEAN;
byte            return IDL_BYTE;
char            return IDL_CHAR;
double          return IDL_DOUBLE;
float           return IDL_FLOAT;
hyper           return IDL_HYPER;
long            return IDL_LONG;
short           return IDL_SHORT;
string          return IDL_STRING;
type            return IDL_TYPE;
unsigned        return IDL_UNSIGNED;
void            return IDL_VOID;

TRUE            return IDL_TRUE;
True            return IDL_TRUE;
FALSE           return IDL_FALSE;
False           return IDL_FALSE;

in              return IDL_IN;
out             return IDL_OUT;
inout           return IDL_INOUT;

get             return IDL_GET;
set             return IDL_SET;

published       return IDL_PUBLISHED;

"..."           return IDL_ELLIPSIS;

("-")?{INT_LITERAL}+(l|L|u|U)?    {
                return asciiToInteger(yytext, &yylval.ival, &yylval.uval);
            }

("-")?{OCT_LITERAL}+(l|L|u|U)?    {
                return asciiToInteger(yytext, &yylval.ival, &yylval.uval);
            }

("-")?{HEX_LITERAL}+(l|L|u|U)?    {
                return asciiToInteger(yytext, &yylval.ival, &yylval.uval);
            }

("-")?{DIGIT}+(e|E)(("+"|"-")?{DIGIT}+)?(f|F)?  |
("-")?{DIGIT}*"."{DIGIT}+((e|E)("+"|"-")?{DIGIT}+)?(f|F)?        {
                yylval.dval = asciiToFloat( yytext );
                return IDL_FLOATING_PT_LITERAL;
            }

{IDENTIFIER}    {
                yylval.sval = new OString(yytext);
                return IDL_IDENTIFIER;
            }

\<\<    {
        yylval.strval = yytext;
        return IDL_LEFTSHIFT;
    }
\>\>    {
        yylval.strval = yytext;
        return IDL_RIGHTSHIFT;
    }
\:\:    {
        yylval.strval = yytext;
        return IDL_SCOPESEPARATOR;
    }

"/*"    { 
            BEGIN( COMMENT );
            docu = OString();
            beginLine = idlc()->getLineNumber();
        }

"/***"  { 
            BEGIN( COMMENT );
            docu = OString();
            beginLine = idlc()->getLineNumber();
        }

<COMMENT>[^*]+  {
                docu += yytext;
            } 

<COMMENT>"*"[^*/]+  {
                docu += yytext;
            }

<COMMENT>"**"   {
                docu += yytext;
            }

<COMMENT>[*]+"/"  {
                docu = docu.trim();
                sal_Int32 nIndex = 0;
                int count = 0;
                do { o3tl::getToken(docu, 0, '\n', nIndex ); count++; } while( nIndex != -1 );
                idlc()->setLineNumber( beginLine + count - 1);
                BEGIN( INITIAL );
            }

"/**"   {
            BEGIN( DOCU );
            docu = OString();
            beginLine = idlc()->getLineNumber();
        }

<DOCU>[^*\n]+   {
                docu += yytext;
            }

<DOCU>"\n"[ \t]*"*"{1}  {
                idlc()->setLineNumber( idlc()->getLineNumber()  + 1);
                docu += "\n";
            }

<DOCU>"\n"  {
                idlc()->setLineNumber( idlc()->getLineNumber()  + 1);
                docu += yytext;
            }

<DOCU>"*"[^*^/\n]*  {
                docu += yytext;
            }

<DOCU>"\n"[ \t]*"*/"    {
                docu = docu.trim();
                sal_Int32 nIndex = 0;
                int count = 0;
                do { o3tl::getToken(docu, 0, '\n', nIndex ); count++; } while( nIndex != -1 );
                idlc()->setLineNumber( beginLine + count - 1);                
                if ( (nIndex = docu.indexOf("/*")) >= 0 || (nIndex = docu.indexOf("///")) >= 0 )
                {
                    if ( 0 != nIndex &&
                         (docu[nIndex - 1] != '"' && docu[nIndex - 1] != ':') )
                        ErrorHandler::syntaxError(PS_NoState, idlc()->getLineNumber(),
                                                     "nested documentation strings are not allowed!");
                }
                idlc()->setDocumentation(docu);
                BEGIN( INITIAL );
            }

<DOCU>"*/"  {
                docu = docu.trim();
                sal_Int32 nIndex = 0;
                int count = 0;
                do { o3tl::getToken(docu, 0, '\n', nIndex ); count++; } while( nIndex != -1 );
                idlc()->setLineNumber( beginLine + count - 1);
                if ( docu.indexOf("/*") >= 0 || docu.indexOf("//") >= 0 )
                {
                    if ( 0 != nIndex &&
                         (docu[nIndex - 1] != '"' && docu[nIndex - 1] != ':') )
                        ErrorHandler::syntaxError(PS_NoState, idlc()->getLineNumber(),
                                                     "nested documentation strings are not allowed!");
                }
                idlc()->setDocumentation(docu);
                BEGIN( INITIAL );
            }

"//"[^/]{1}.*"\n" {
                /* only a comment */
                OString docStr(yytext);
                docStr = docStr.copy( 0, docStr.lastIndexOf('\n') );
                docStr = docStr.copy( docStr.lastIndexOf('/')+1 );
                docStr = docStr.trim();
                idlc()->incLineNumber();
            }

"///".*"\n"  {
                OString docStr(yytext);
                docStr = docStr.copy( 0, docStr.lastIndexOf('\n') );
                docStr = docStr.copy( docStr.lastIndexOf('/')+1 );
                docStr = docStr.trim();
                idlc()->incLineNumber();
                idlc()->setDocumentation(docStr);
            }

.   return yytext[0];

^#[ \t]*line[ \t]*[0-9]*" ""\""[^\"]*"\""\n    {
    parseLineAndFile(yytext);
}

^#[ \t]*[0-9]*" ""\""[^\"]*"\""" "[0-9]*\n {
    parseLineAndFile(yytext);
}

^#[ \t]*[0-9]*" ""\""[^\"]*"\""\n {
    parseLineAndFile(yytext);
}

^#[ \t]*[0-9]*\n {
    parseLineAndFile(yytext);
}

^#[ \t]*ident.*\n {
    /* ignore cpp ident */
    idlc()->incLineNumber();
}

^#[ \t]*pragma[ \t].*\n        {       /* remember pragma */
    idlParsePragma(yytext);
    idlc()->incLineNumber();
}

%%

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */