source: cpp/frams/param/multiparamload.cpp @ 1135

// This file is a part of Framsticks SDK.  http://www.framsticks.com/
// Copyright (C) 1999-2020  Maciej Komosinski and Szymon Ulatowski.
// See LICENSE.txt for details.

#include "multiparamload.h"
#include <frams/util/sstringutils.h>
#include "common/log.h"
#include <ctype.h>

void MultiParamLoader::init()
{
        file = 0; ownfile = 0;
        status = 0;
        reset();
}

void MultiParamLoader::reset()
{
        status = 0;
        breakcond = OnError;
        aborting = false;
        emptyparam.setParamTab(empty_paramtab);
        linenum = 0;
}

int MultiParamLoader::findObject(const ExtObject &o)
{
        for (int i = 0; i < objects.size(); i++)
                if ((*objects(i)) == o)
                        return i;
        return -1;
}

void MultiParamLoader::removeObject(const ExtObject &o)
{
        int i = findObject(o);
        if (i >= 0)
        {
                delete objects(i);
                objects -= i;
        }
}

void MultiParamLoader::clearObjects()
{
        FOREACH(ExtObject*, o, objects)
                delete o;
        objects.clear();
}

void MultiParamLoader::load()
{
        clearstack();
        if (!file)
        {
                lasterror = "can't open file";
                status = OnError;
                return;
        }
        status = Loading;
        aborting = false;
}

void MultiParamLoader::abort()
{
        if (file && ownfile)
        {
                delete file;
                file = 0;
        }
        clearstack();
        status = Finished;
        aborting = true;
}

void MultiParamLoader::load(VirtFILE *f)
{
        abort();
        ownfile = 0;
        file = f;
        load();
}

void MultiParamLoader::load(const char* filename)
{
        abort();
        ownfile = 1;
        file = Vfopen(filename, FOPEN_READ_BINARY);
        load();
}

int MultiParamLoader::go()
{
        SString buf;
        if (status == OnError) return getStatusClearError();
        int unexpected_line = 0;
        while (!finished())
        {
                if ((status == BeforeObject) || ((status == BeforeUnknown) && !lastobject.isEmpty()))
                {
                        Param tmp_param;
                        ParamInterface *pi = lastobject.getParamInterface(tmp_param);
                        ParamInterface::LoadOptions opts;
                        opts.abortable = &aborting;
                        opts.warn_unknown_fields = true;
                        opts.linenum = &linenum;
                        pi->load(ParamInterface::FormatMultiLine, file, &opts);
                        if ((status != Finished) && maybeBreak(AfterObject))
                                break;
                        unexpected_line = 0;
                        continue;
                }
                else if (status == BeforeUnknown)
                {
                        logPrintf("MultiParamLoader", "go", LOG_WARN, "Skipping object '%s'", lastunknown.c_str());
                        loadObjectNow(&emptyparam, false);
                        continue;
                }
                if (!loadSStringLine(file, buf))
                {
                        unexpected_line = 0;
                        if (!returnFromIncluded())
                        {
                                abort();
                                break;
                        }
                        else
                                continue;
                }
                linenum++;
                if (buf[0] == '#')
                {
                        unexpected_line = 0;
                        if (buf.startsWith("#include"))
                        {
                                const char* t = strchr(buf.c_str(), '\"'), *t2 = 0;
                                if (t)
                                        t2 = strchr(t + 1, '\"');
                                if (t2)
                                {
                                        SString filename(t + 1, t2 - t - 1);
                                        includeFile(filename);
                                }
                                else
                                {
                                        const char* thisfilename = file->VgetPath();
                                        logPrintf("MultiParamLoader", "go", LOG_WARN, "invalid \"%s\"%s%s", buf.c_str(),
                                                (thisfilename ? " in " : ""), (thisfilename ? thisfilename : ""));
                                }
                                continue;
                        }
                        else if ((status != Finished) && maybeBreak(OnComment))
                        {
                                lastcomment = buf.substr(1);
                                break;
                        }
                        continue;
                }
                buf = trim(buf);
                if (buf.length() == 0)
                        unexpected_line = 0;
                else if ((buf.length() > 1) && (buf[buf.length() - 1] == ':'))
                {
                        unexpected_line = 0;
                        lastunknown = 0;
                        lastunknown = buf.substr(0, buf.length() - 1);
                        lastobject.setEmpty();
                        FOREACH(ExtObject*, o, objects)
                        {
                                if (!strcmp(o->interfaceName(), lastunknown.c_str())) { lastobject = *o; break; }
                        }
                        if (!lastobject.isEmpty())
                        {
                                if (maybeBreak(BeforeObject))
                                        break;
                        }
                        else
                        {
                                if (maybeBreak(BeforeUnknown))
                                        break;
                        }

                }
                else
                {
                        switch (unexpected_line)
                        {
                        case 0:
                        {
                                const char* thisfilename = file->VgetPath();
                                logPrintf("MultiParamLoader", "go", LOG_WARN, "Ignored unexpected line %d%s",
                                        linenum,
                                        thisfilename ? SString::sprintf(" while reading '%s'", thisfilename).c_str() : "");
                        }
                        break;

                        case 1:
                                logPrintf("MultiParamLoader", "go", LOG_WARN, "The following line(s) were also unexpected and were ignored");
                                break;
                        }
                        unexpected_line++;
                }
        }
        return getStatusClearError();
}

bool MultiParamLoader::alreadyIncluded(const char* filename)
{
        int i;
        const char* t;
        for (i = 0; i < filestack.size(); i++)
        {
                t = filestack(i)->VgetPath();
                if (!t) continue;
                if (!strcmp(filename, t)) return true;
        }
        return false;
}

void MultiParamLoader::includeFile(SString& filename)
{
        const char* thisfilename = file->VgetPath();
        SString newfilename;
        const char* t = thisfilename ? strrchr(thisfilename, PATH_SEPARATOR_CHAR) : 0;

        if (thisfilename && t)
        {
                newfilename.append(thisfilename, t - thisfilename + 1);
                newfilename += filename;
        }
        else
                newfilename = filename;

        if (alreadyIncluded(newfilename.c_str()))
        {
                logPrintf("MultiParamLoader", "include", LOG_WARN, "circular reference ignored (\"%s\")",
                        filename.c_str());
                return;
        }

        VirtFILE *f = Vfopen(newfilename.c_str(), FOPEN_READ_BINARY);
        if (!f)
        {
                logPrintf("MultiParamLoader", "include", LOG_WARN, "\"%s\" not found", newfilename.c_str());
        }
        else
        {
                filestack += file;
                file = f;
        }
}

VirtFILE* MultiParamLoader::popstack()
{
        if (!filestack.size()) return 0;
        VirtFILE* f = filestack(filestack.size() - 1);
        filestack.remove(filestack.size() - 1);
        return f;
}

void MultiParamLoader::clearstack()
{
        VirtFILE *f;
        while (f = popstack()) delete f;
}

bool MultiParamLoader::returnFromIncluded()
{
        if (!filestack.size()) return false;
        if (file) delete file;
        file = popstack();
        return true;
}

int MultiParamLoader::loadObjectNow(const ExtObject& o, bool warn_unknown_fields)
{
        Param tmp_param;
        ParamInterface *pi = o.getParamInterface(tmp_param);
        ParamInterface::LoadOptions opts;
        opts.abortable = &aborting;
        opts.warn_unknown_fields = warn_unknown_fields;
        opts.linenum = &linenum;
        pi->load(ParamInterface::FormatMultiLine, file, &opts);
        status = AfterObject;
        return 0;
}

int MultiParamLoader::run()
{
        int stat;
        breakOn(OnError);
        while (stat = go())
                if (stat == OnError)
                {
                        abort();
                        return 0;
                }
        return 1;
}

SString MultiParamLoader::currentFilePathForErrorMessage()
{
        const char* filename = getFile()->VgetPath();
        if (filename)
                return SString::sprintf(" in '%s'", filename);
        return SString::empty();
}