/* Software License Agreement
 * 
 *     Copyright(C) 1994-2021 David Lindauer, (LADSoft)
 * 
 *     This file is part of the Orange C Compiler package.
 * 
 *     The Orange C Compiler package is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * 
 *     The Orange C Compiler package is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License
 *     along with Orange C.  If not, see <http://www.gnu.org/licenses/>.
 * 
 *     contact information:
 *         email: TouchStone222@runbox.com <David Lindauer>
 * 
 */

#include "LinkManager.h"
#include "LinkRemapper.h"
#include "LinkPartition.h"
#include "LinkOverlay.h"
#include "LinkRegion.h"
#include "ObjFactory.h"
#include "ObjIeee.h"
#include "LinkRegionFileSpec.h"
#include <ctime>
#include <cstdio>
#include <cstring>

unsigned LinkRemapper::crc_table[256] = {
    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
    0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
    0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
    0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
    0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
    0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
    0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
    0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
    0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
    0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
    0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
    0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
    0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
    0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
    0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
    0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
    0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
    0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};
unsigned LinkRemapper::crc32(unsigned char* buf, int len, unsigned crc)
{
    for (int i = 0; i < len; i++)
    {
        crc = crc_table[(crc ^ buf[i]) & 0xFF] ^ (crc >> 8);
    }
    return crc;
}
ObjInt LinkRemapper::RenumberSection(LinkRegion* region, ObjSection* dest, LinkRegion::OneSection* source, int group, int base)
{
    ObjInt rv = region->GetAttribs().GetSize();
    ObjSection* sect = source->section;
    dest->SetQuals(dest->GetQuals() | sect->GetQuals());
    sect->SetIndex(group);
    sect->SetOffset(new ObjExpression(region->GetParent()->GetAttribs().GetAddress()));
    ObjMemoryManager& memManager = sect->GetMemoryManager();
    LinkSymbolData d;
    manager->MapSectionToParent(source->section, dest);
    d.SetFile(source->file);
    // now copy all the data from the old section to the new one
    if (!(dest->GetQuals() & ObjSection::common) || dest->GetMemoryManager().MemoryBegin() == dest->GetMemoryManager().MemoryEnd())
    {
        int n = sect->GetBase() - base;
        if (n > 0)
        {
            // padding between sections, e.g. for alignment and roundsize
            ObjMemory* newMem = new ObjMemory(n, region->GetAttribs().GetFill());
            dest->Add(newMem);
        }
        else
        {
            n = 0;
        }
        source->section->SetOffset(new ObjExpression(base + n));
        for (auto it = memManager.MemoryBegin(); it != memManager.MemoryEnd(); ++it)
        {
            n += (*it)->GetSize();
            // redo source file indexes
            dest->Add(*it);
            if ((*it)->GetFixup())
            {
                (*it)->SetFixup(ScanExpression((*it)->GetFixup(), &d));
            }
        }
        rv = n;
    }
    return rv;
}
bool LinkRemapper::OptimizeRight(ObjExpression* exp, ObjExpression* right)
{
    bool rv = false;
    switch (right->GetOperator())
    {
        case ObjExpression::eSub:
            rv = OptimizeRight(exp, right->GetLeft());
            break;
        case ObjExpression::eAdd:
            rv = OptimizeRight(exp, right->GetLeft());
            if (!rv)
                rv = OptimizeRight(exp, right->GetRight());
            break;
        case ObjExpression::eSection:
            if (exp->GetSection() == right->GetSection())
            {
                rv = true;
                delete right;
            }
            break;
        default:
            break;
    }
    return rv;
}
ObjExpression* LinkRemapper::Optimize(ObjExpression* exp, ObjExpression* right)
{
    switch (exp->GetOperator())
    {
        case ObjExpression::eSection:
        {
            if (right && OptimizeRight(exp, right))
            {
                delete exp;
                exp = new ObjExpression(0);
            }
            break;
        }
        case ObjExpression::eSub:
        {
            if (right)
                exp->SetLeft(Optimize(exp->GetLeft(), right));
            exp->SetLeft(Optimize(exp->GetLeft(), exp->GetRight()));
            exp->SetRight(Optimize(exp->GetRight(), nullptr));
            break;
        }
        default:
            if (exp->GetLeft())
                exp->SetLeft(Optimize(exp->GetLeft(), right));
            if (exp->GetRight())
                exp->SetRight(Optimize(exp->GetRight(), right));
            break;
    }
    return exp;
}
ObjExpression* LinkRemapper::RewriteExpression(LinkExpression* exp, LinkExpressionSymbol* sym)
{
    ObjExpression* rv = nullptr;
    switch (exp->GetOperator())
    {
        case LinkExpression::eValue:
            rv = new ObjExpression(exp->GetValue());
            break;
        case LinkExpression::ePC:
            break;
        case LinkExpression::eSymbol:
        {
            LinkExpressionSymbol* sym = LinkExpression::FindSymbol(exp->GetSymbol());
            if (sym)
            {
                rv = RewriteExpression(sym->GetValue(), sym);
            }
            break;
        }
        case LinkExpression::eSection:
        {
            int n = exp->GetSection();
            if (n < sections.size())
            {
                rv = new ObjExpression(sections[n]);
            }
            break;
        }
        case LinkExpression::eUnresolvedSection:
            rv = new ObjExpression(ObjExpression::eAdd, new ObjExpression(exp->GetUnresolvedSection()),
                                   new ObjExpression(exp->GetUnresolvedSection()->GetBase()));
            break;
        case LinkExpression::eAdd:
            rv = new ObjExpression(ObjExpression::eAdd, RewriteExpression(exp->GetLeft(), sym),
                                   RewriteExpression(exp->GetRight(), sym));
            break;
        case LinkExpression::eSub:
            rv = new ObjExpression(ObjExpression::eSub, RewriteExpression(exp->GetLeft(), sym),
                                   RewriteExpression(exp->GetRight(), sym));
            break;
        case LinkExpression::eMul:
            rv = new ObjExpression(ObjExpression::eMul, RewriteExpression(exp->GetLeft(), sym),
                                   RewriteExpression(exp->GetRight(), sym));
            break;
        case LinkExpression::eDiv:
            rv = new ObjExpression(ObjExpression::eDiv, RewriteExpression(exp->GetLeft(), sym),
                                   RewriteExpression(exp->GetRight(), sym));
            break;
        case LinkExpression::eNeg:
            rv = new ObjExpression(ObjExpression::eNeg, RewriteExpression(exp->GetLeft(), sym),
                                   RewriteExpression(exp->GetRight(), sym));
            break;
        case LinkExpression::eCpl:
            rv = new ObjExpression(ObjExpression::eCmpl, RewriteExpression(exp->GetLeft(), sym),
                                   RewriteExpression(exp->GetRight(), sym));
            break;
    }
    if (!rv)
    {
        LinkManager::LinkError(std::string("Evaluation of symbol '") + sym->GetName() + "' too complex");
        rv = new ObjExpression(0);
    }
    return rv;
}
ObjExpression* LinkRemapper::ScanExpression(ObjExpression* offset, LinkSymbolData* d)
{
    switch (offset->GetOperator())
    {
        default:
        case ObjExpression::eSymbol:
            if (d && offset->GetSymbol()->GetType() == ObjSymbol::eExternal)
            {
                d->SetSymbol(offset->GetSymbol());
                auto it = manager->PublicFind(d);
                if (it != manager->PublicEnd())
                {
                    return (*it)->GetSymbol()->GetOffset();
                }
                LinkExpressionSymbol* sym = LinkExpression::FindSymbol(offset->GetSymbol()->GetName());
                if (sym)
                {
                    return Optimize(RewriteExpression(sym->GetValue(), sym), nullptr);
                }
            }
            return offset;
        case ObjExpression::ePC:
        case ObjExpression::eValue:
        case ObjExpression::eNop:
            return offset;
        case ObjExpression::eSection:
        {
            int n = offset->GetSection()->GetVirtualOffset();
            if (n != -1)
            {
                return new ObjExpression(n);
            }
            else
            {
                n = offset->GetSection()->GetBase();
                if (n != 0)
                {
                    return new ObjExpression(ObjExpression::eAdd, offset, new ObjExpression(n));
                }
            }
            return offset;
        }
        case ObjExpression::eExpression:
        case ObjExpression::eNonExpression:
        case ObjExpression::eAdd:
        case ObjExpression::eSub:
        case ObjExpression::eMul:
        case ObjExpression::eDiv:
            offset->SetRight(ScanExpression(offset->GetRight(), d));
            // fallthrough
        case ObjExpression::eNeg:
        case ObjExpression::eCmpl:
            offset->SetLeft(ScanExpression(offset->GetLeft(), d));
            return offset;
    }
}
void LinkRemapper::RenumberSymbol(ObjFile* file, ObjSymbol* sym, int index)
{
    if (sym->GetOffset())
        sym->SetOffset(ScanExpression(sym->GetOffset(), nullptr));
    sym->SetIndex(index);
    file->Add(sym);
}
ObjInt LinkRemapper::GetTypeIndex(ObjType* type)
{
    if (type->GetType() < ObjType::eVoid)
        return LookupFileType(type->GetIndex());
    return LookupFileType((int)type->GetType());
}
/*
void LinkRemapper::SetTypeIndex(ObjType *type)
{
    if (type->GetType() < ObjType::eVoid)
        type->SetIndex(LookupFileType(type->GetIndex()));
    else
        type->SetType((ObjType::eType)LookupFileType((int)type->GetType()));
}
*/
ObjInt LinkRemapper::RegisterType(ObjFile* file, ObjType* type, char* name)
{
    int n;
    auto sny = newTypes.find(name);
    if (sny != newTypes.end())
    {
        n = sny->second;  // already exists in another module
    }
    else
    {
        // this is the first time we encountered it, register it as a global type
        file->Add(type);
        n = indexManager->NextType();
        newTypes[name] = n;
    }
    fileTypes[type->GetIndex()] = n;
    // type->SetIndex(n);
    return n;
}
ObjInt LinkRemapper::MapType(ObjFile* file, ObjType* type)
{
    char name[4096];
    // we don't already have a mapping for this type, now see if the type
    // was declared in some other module
    switch (type->GetType())
    {
        case ObjType::eLRef:
            sprintf(name, "&%d;%d", type->GetSize(), GetTypeIndex(type->GetBaseType()));
            break;
        case ObjType::eRRef:
            sprintf(name, "^%d;%d", type->GetSize(), GetTypeIndex(type->GetBaseType()));
            break;
        case ObjType::ePointer:
            sprintf(name, "*%d;%d", type->GetSize(), GetTypeIndex(type->GetBaseType()));
            break;
        case ObjType::eFunction:
        {
            ObjFunction* func = static_cast<ObjFunction*>(type);
            sprintf(name, "$%d;%d", func->GetLinkage(), GetTypeIndex(func->GetBaseType()));
        }
        break;
        case ObjType::eBitField:
            sprintf(name, "B%d;%d;%d;%d", type->GetSize(), GetTypeIndex(type->GetBaseType()), type->GetStartBit(),
                    type->GetBitCount());
            break;
        case ObjType::eStruct:
        case ObjType::eUnion:
        case ObjType::eEnum:
        {

            // we are crcing the fields to allow for the possibility they use the same
            // structure name different ways in differnet files..
            unsigned crc = 0xffffffff;
            {
                for (auto it = type->FieldBegin(); it != type->FieldEnd(); ++it)
                {
                    sprintf(name, "%s;%d;", (*it)->GetName().c_str(), (*it)->GetConstVal());
                    crc = crc32((unsigned char*)name, strlen(name), crc);
                }
            }
            crc ^= 0xffffffff;
            sprintf(name, "S%d;%s;%X", type->GetSize(), type->GetName().c_str(), crc);
            break;
        }
        case ObjType::eArray:
        case ObjType::eVla:
            sprintf(name, "A%d;%d;%d;%d;%d", type->GetSize(), type->GetBaseType() ? GetTypeIndex(type->GetBaseType()) : 0,
                    GetTypeIndex(type->GetIndexType()), type->GetBase(), type->GetTop());
            break;
        case ObjType::eTypeDef:
            sprintf(name, "T%d;%d;%s", type->GetSize(), GetTypeIndex(type->GetBaseType()), type->GetName().c_str());
            break;
        default:
            break;
    }
    RegisterType(file, type, name);
    return 0;
}
ObjInt LinkRemapper::LookupFileType(ObjInt type)
{
    // see if it is a builtin...
    if (type <= ObjType::eReservedTop)
        return type;
    // see if we already have a mapping for this type
    auto nty = fileTypes.find(type);
    if (nty != fileTypes.end())
        return nty->second;
    return 0;
}
void LinkRemapper::RenumberType(ObjFile* file, ObjType* type)
{
    //	type->SetIndex(indexManager->NextType());
    //	file->Add(type);
    //   return;
    int n = LookupFileType(type->GetIndex());
    if (!n)
    {
        MapType(file, type);
    }
    else
    {
        type->SetIndex(n);
    }
}
void LinkRemapper::RenumberSourceFile(ObjFile* file, ObjSourceFile* sourceFile)
{
    // redo source file indexes for duplicate sources
    sourceFile->SetIndex(indexManager->NextFile());
    file->Add(sourceFile);
}
ObjFile* LinkRemapper::Remap()
{
    ObjFile* file = new ObjFile(manager->GetOutputFile());
    time_t t = time(0);
    tm* tmx = localtime(&t);
    if (tmx)
        file->SetFileTime(*tmx);
    int group = 0;
    for (auto it = manager->PartitionBegin(); it != manager->PartitionEnd(); ++it)
    {
        if ((*it)->GetPartition())
        {
            for (auto ito = (*it)->GetPartition()->OverlayBegin(); ito != (*it)->GetPartition()->OverlayEnd(); ++ito)
            {
                if ((*ito)->GetOverlay())
                {
                    ObjString name = (*ito)->GetOverlay()->GetName();
                    ObjSection* section = new ObjSection(name, group);
                    sections.push_back(section);
                    ++group;
                }
            }
        }
    }
    std::map<std::string, int> externs;
    for (auto it = manager->FileBegin(); it != manager->FileEnd(); ++it)
    {
        if ((*it)->GetBigEndian())
            file->SetBigEndian(true);
        for (auto its = (*it)->PublicBegin(); its != (*it)->PublicEnd(); ++its)
        {
            RenumberSymbol(file, *its, indexManager->NextPublic());
        }
        for (auto its = (*it)->ExternalBegin(); its != (*it)->ExternalEnd(); ++its)
        {
            std::string name = (*its)->GetName();
            if (manager->IsExternal(name))
            {
                auto itf = externs.find(name);

                int n;
                if (itf == externs.end())
                {
                    n = indexManager->NextExternal();
                    externs[name] = n;
                    RenumberSymbol(file, *its, n);
                }
                else
                {
                    if ((*its)->GetOffset())
                        (*its)->SetOffset(ScanExpression((*its)->GetOffset(), nullptr));
                    (*its)->SetIndex(itf->second);
                }
            }
        }
        for (auto its = (*it)->LocalBegin(); its != (*it)->LocalEnd(); ++its)
        {
            RenumberSymbol(file, *its, indexManager->NextLocal());
        }
        for (auto its = (*it)->AutoBegin(); its != (*it)->AutoEnd(); ++its)
        {
            RenumberSymbol(file, *its, indexManager->NextAuto());
        }
        for (auto its = (*it)->RegBegin(); its != (*it)->RegEnd(); ++its)
        {
            RenumberSymbol(file, *its, indexManager->NextReg());
        }
        for (auto its = (*it)->ExportBegin(); its != (*it)->ExportEnd(); ++its)
        {
            RenumberSymbol(file, *its, 0);
        }
        for (auto its = (*it)->TypeBegin(); its != (*it)->TypeEnd(); ++its)
        {
            RenumberType(file, *its);
        }
        for (auto its = (*it)->TypeBegin(); its != (*it)->TypeEnd(); ++its)
        {
            (*its)->SetIndex(LookupFileType((*its)->GetIndex()));
        }
        fileTypes.clear();
        for (auto its = (*it)->SourceFileBegin(); its != (*it)->SourceFileEnd(); ++its)
        {
            RenumberSourceFile(file, *its);
        }
    }
    for (auto its = manager->ImportBegin(); its != manager->ImportEnd(); ++its)
    {
        ObjSymbol* sym = (*its)->GetSymbol();
        RenumberSymbol(file, sym, 0);
    }
    group = 0;
    for (auto it = manager->PartitionBegin(); it != manager->PartitionEnd(); ++it)
    {
        if ((*it)->GetPartition())
        {
            for (auto ito = (*it)->GetPartition()->OverlayBegin(); ito != (*it)->GetPartition()->OverlayEnd(); ++ito)
            {
                if ((*ito)->GetOverlay())
                {
                    ObjSection* section = sections[group];
                    ObjInt base = 0;
                    section->SetQuals(0);
                    section->SetAlignment((*ito)->GetOverlay()->GetAttribs().GetAlign());
                    if ((*ito)->GetOverlay()->GetAttribs().GetSize() > 0)
                        section->SetSize(new ObjExpression((*ito)->GetOverlay()->GetAttribs().GetSize()));
                    for (auto itr = (*ito)->GetOverlay()->RegionBegin(); itr != (*ito)->GetOverlay()->RegionEnd(); ++itr)
                    {
                        if ((*itr)->GetRegion())
                        {
                            ObjInt bytes = 0;
                            for (auto its = (*itr)->GetRegion()->NowDataBegin(); its != (*itr)->GetRegion()->NowDataEnd(); ++its)
                                for (auto cursect : (*its)->sections)
                                    bytes += RenumberSection((*itr)->GetRegion(), section, &cursect, group, bytes + base);
                            for (auto its = (*itr)->GetRegion()->NormalDataBegin(); its != (*itr)->GetRegion()->NormalDataEnd();
                                 ++its)
                                for (auto cursect : (*its)->sections)
                                    bytes += RenumberSection((*itr)->GetRegion(), section, &cursect, group, bytes + base);
                            for (auto its = (*itr)->GetRegion()->PostponeDataBegin(); its != (*itr)->GetRegion()->PostponeDataEnd();
                                 ++its)
                                for (auto cursect : (*its)->sections)
                                    bytes += RenumberSection((*itr)->GetRegion(), section, &cursect, group, bytes + base);
                            /*
                            int n= (*itr)->GetRegion()->GetAttribs().GetSize() - bytes;
                            if (n > 0)
                            {
                                // padding between sections, e.g. for alignment and roundsize
                                ObjMemory *newMem = new ObjMemory(n, (*itr)->GetRegion()->GetAttribs().GetFill());
                                section->Add(newMem);
                            }
                            */
                            base += bytes;
                        }
                    }
                    if (section->GetSize())
                    {
                        int n = section->GetSize()->Eval(0) - section->GetMemoryManager().GetSize();
                        if (n > 0)
                        {
                            // padding between sections, e.g. for alignment and roundsize
                            ObjMemory* newMem = new ObjMemory(n, (*ito)->GetOverlay()->GetAttribs().GetFill());
                            section->Add(newMem);
                        }
                    }
                    if (completeLink)
                    {
                        section->SetQuals(section->GetQuals() | ObjSection::absolute);
                        section->SetBase((*ito)->GetOverlay()->GetAttribs().GetAddress());
                    }
                    section->SetOffset(new ObjExpression((*ito)->GetOverlay()->GetAttribs().GetAddress()));
                    file->Add(section);
                    ++group;
                }
            }
        }
    }
    ObjExpression* sa = manager->GetObjIo()->GetStartAddress();
    if (sa)
    {
        manager->GetObjIo()->SetStartAddress(file, ScanExpression(sa, nullptr));
    }

    return file;
}