/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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with or without modification, are permitted provided that the following
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* Redistributions of source code must retain the above
  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
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  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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*/

/** @file  ASEParser.cpp
 *  @brief Implementation of the ASE parser class
 */

#ifndef ASSIMP_BUILD_NO_ASE_IMPORTER
#ifndef ASSIMP_BUILD_NO_3DS_IMPORTER

// internal headers
#include "ASELoader.h"
#include "PostProcessing/TextureTransform.h"

#include <assimp/fast_atof.h>
#include <assimp/DefaultLogger.hpp>

using namespace Assimp;
using namespace Assimp::ASE;

// ------------------------------------------------------------------------------------------------
// Begin an ASE parsing function

#define AI_ASE_PARSER_INIT() \
    int iDepth = 0;

// ------------------------------------------------------------------------------------------------
// Handle a "top-level" section in the file. EOF is no error in this case.

#define AI_ASE_HANDLE_TOP_LEVEL_SECTION()          \
    else if ('{' == *filePtr) iDepth++;            \
    else if ('}' == *filePtr) {                    \
        if (0 == --iDepth) {                       \
            ++filePtr;                             \
            SkipToNextToken();                     \
            return;                                \
        }                                          \
    }                                              \
    if ('\0' == *filePtr) {                        \
        return;                                    \
    }                                              \
    if (IsLineEnd(*filePtr) && !bLastWasEndLine) { \
        ++iLineNumber;                             \
        bLastWasEndLine = true;                    \
    } else                                         \
        bLastWasEndLine = false;                   \
    ++filePtr;

// ------------------------------------------------------------------------------------------------
// Handle a nested section in the file. EOF is an error in this case
// @param level "Depth" of the section
// @param msg Full name of the section (including the asterisk)

#define AI_ASE_HANDLE_SECTION(level, msg)                          \
    if ('{' == *filePtr)                                           \
        iDepth++;                                                  \
    else if ('}' == *filePtr) {                                    \
        if (0 == --iDepth) {                                       \
            ++filePtr;                                             \
            SkipToNextToken();                                     \
            return;                                                \
        }                                                          \
    } else if ('\0' == *filePtr) {                                 \
        LogError("Encountered unexpected EOL while parsing a " msg \
                 " chunk (Level " level ")");                      \
    }                                                              \
    if (IsLineEnd(*filePtr) && !bLastWasEndLine) {                 \
        ++iLineNumber;                                             \
        bLastWasEndLine = true;                                    \
    } else                                                         \
        bLastWasEndLine = false;                                   \
    ++filePtr;

// ------------------------------------------------------------------------------------------------
Parser::Parser(const char *szFile, unsigned int fileFormatDefault) {
    ai_assert(nullptr != szFile);

    filePtr = szFile;
    iFileFormat = fileFormatDefault;

    // make sure that the color values are invalid
    m_clrBackground.r = get_qnan();
    m_clrAmbient.r = get_qnan();

    // setup some default values
    iLineNumber = 0;
    iFirstFrame = 0;
    iLastFrame = 0;
    iFrameSpeed = 30; // use 30 as default value for this property
    iTicksPerFrame = 1; // use 1 as default value for this property
    bLastWasEndLine = false; // need to handle \r\n seqs due to binary file mapping
}

// ------------------------------------------------------------------------------------------------
void Parser::LogWarning(const char *szWarn) {
    ai_assert(nullptr != szWarn);

    char szTemp[2048];
#if _MSC_VER >= 1400
    sprintf_s(szTemp, "Line %u: %s", iLineNumber, szWarn);
#else
    ai_snprintf(szTemp, sizeof(szTemp), "Line %u: %s", iLineNumber, szWarn);
#endif

    // output the warning to the logger ...
    ASSIMP_LOG_WARN(szTemp);
}

// ------------------------------------------------------------------------------------------------
void Parser::LogInfo(const char *szWarn) {
    ai_assert(nullptr != szWarn);

    char szTemp[1024];
#if _MSC_VER >= 1400
    sprintf_s(szTemp, "Line %u: %s", iLineNumber, szWarn);
#else
    ai_snprintf(szTemp, 1024, "Line %u: %s", iLineNumber, szWarn);
#endif

    // output the information to the logger ...
    ASSIMP_LOG_INFO(szTemp);
}

// ------------------------------------------------------------------------------------------------
AI_WONT_RETURN void Parser::LogError(const char *szWarn) {
    ai_assert(nullptr != szWarn);

    char szTemp[1024];
#if _MSC_VER >= 1400
    sprintf_s(szTemp, "Line %u: %s", iLineNumber, szWarn);
#else
    ai_snprintf(szTemp, 1024, "Line %u: %s", iLineNumber, szWarn);
#endif

    // throw an exception
    throw DeadlyImportError(szTemp);
}

// ------------------------------------------------------------------------------------------------
bool Parser::SkipToNextToken() {
    while (true) {
        char me = *filePtr;

        // increase the line number counter if necessary
        if (IsLineEnd(me) && !bLastWasEndLine) {
            ++iLineNumber;
            bLastWasEndLine = true;
        } else
            bLastWasEndLine = false;
        if ('*' == me || '}' == me || '{' == me) return true;
        if ('\0' == me) return false;

        ++filePtr;
    }
}

// ------------------------------------------------------------------------------------------------
bool Parser::SkipSection() {
    // must handle subsections ...
    int iCnt = 0;
    while (true) {
        if ('}' == *filePtr) {
            --iCnt;
            if (0 == iCnt) {
                // go to the next valid token ...
                ++filePtr;
                SkipToNextToken();
                return true;
            }
        } else if ('{' == *filePtr) {
            ++iCnt;
        } else if ('\0' == *filePtr) {
            LogWarning("Unable to parse block: Unexpected EOF, closing bracket \'}\' was expected [#1]");
            return false;
        } else if (IsLineEnd(*filePtr))
            ++iLineNumber;
        ++filePtr;
    }
}

// ------------------------------------------------------------------------------------------------
void Parser::Parse() {
    AI_ASE_PARSER_INIT();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Version should be 200. Validate this ...
            if (TokenMatch(filePtr, "3DSMAX_ASCIIEXPORT", 18)) {
                unsigned int fmt;
                ParseLV4MeshLong(fmt);

                if (fmt > 200) {
                    LogWarning("Unknown file format version: *3DSMAX_ASCIIEXPORT should \
                               be <= 200");
                }
                // *************************************************************
                // - fmt will be 0 if we're unable to read the version number
                // there are some faulty files without a version number ...
                // in this case we'll guess the exact file format by looking
                // at the file extension (ASE, ASK, ASC)
                // *************************************************************

                if (fmt) {
                    iFileFormat = fmt;
                }
                continue;
            }
            // main scene information
            if (TokenMatch(filePtr, "SCENE", 5)) {
                ParseLV1SceneBlock();
                continue;
            }
            // "group" - no implementation yet, in facte
            // we're just ignoring them for the moment
            if (TokenMatch(filePtr, "GROUP", 5)) {
                Parse();
                continue;
            }
            // material list
            if (TokenMatch(filePtr, "MATERIAL_LIST", 13)) {
                ParseLV1MaterialListBlock();
                continue;
            }
            // geometric object (mesh)
            if (TokenMatch(filePtr, "GEOMOBJECT", 10))

            {
                m_vMeshes.emplace_back("UNNAMED");
                ParseLV1ObjectBlock(m_vMeshes.back());
                continue;
            }
            // helper object = dummy in the hierarchy
            if (TokenMatch(filePtr, "HELPEROBJECT", 12))

            {
                m_vDummies.emplace_back();
                ParseLV1ObjectBlock(m_vDummies.back());
                continue;
            }
            // light object
            if (TokenMatch(filePtr, "LIGHTOBJECT", 11))

            {
                m_vLights.emplace_back("UNNAMED");
                ParseLV1ObjectBlock(m_vLights.back());
                continue;
            }
            // camera object
            if (TokenMatch(filePtr, "CAMERAOBJECT", 12)) {
                m_vCameras.emplace_back("UNNAMED");
                ParseLV1ObjectBlock(m_vCameras.back());
                continue;
            }
            // comment - print it on the console
            if (TokenMatch(filePtr, "COMMENT", 7)) {
                std::string out = "<unknown>";
                ParseString(out, "*COMMENT");
                LogInfo(("Comment: " + out).c_str());
                continue;
            }
            // ASC bone weights
            if (AI_ASE_IS_OLD_FILE_FORMAT() && TokenMatch(filePtr, "MESH_SOFTSKINVERTS", 18)) {
                ParseLV1SoftSkinBlock();
            }
        }
        AI_ASE_HANDLE_TOP_LEVEL_SECTION();
    }
    return;
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV1SoftSkinBlock() {
    // TODO: fix line counting here

    // **************************************************************
    // The soft skin block is formatted differently. There are no
    // nested sections supported and the single elements aren't
    // marked by keywords starting with an asterisk.

    /**
    FORMAT BEGIN

    *MESH_SOFTSKINVERTS {
    <nodename>
    <number of vertices>

    [for <number of vertices> times:]
        <number of weights> [for <number of weights> times:] <bone name> <weight>
    }

    FORMAT END
    */
    // **************************************************************
    while (true) {
        if (*filePtr == '}') {
            ++filePtr;
            return;
        } else if (*filePtr == '\0')
            return;
        else if (*filePtr == '{')
            ++filePtr;

        else // if (!IsSpace(*filePtr) && !IsLineEnd(*filePtr))
        {
            ASE::Mesh *curMesh = nullptr;
            unsigned int numVerts = 0;

            const char *sz = filePtr;
            while (!IsSpaceOrNewLine(*filePtr))
                ++filePtr;

            const unsigned int diff = (unsigned int)(filePtr - sz);
            if (diff) {
                std::string name = std::string(sz, diff);
                for (std::vector<ASE::Mesh>::iterator it = m_vMeshes.begin();
                        it != m_vMeshes.end(); ++it) {
                    if ((*it).mName == name) {
                        curMesh = &(*it);
                        break;
                    }
                }
                if (!curMesh) {
                    LogWarning("Encountered unknown mesh in *MESH_SOFTSKINVERTS section");

                    // Skip the mesh data - until we find a new mesh
                    // or the end of the *MESH_SOFTSKINVERTS section
                    while (true) {
                        SkipSpacesAndLineEnd(&filePtr);
                        if (*filePtr == '}') {
                            ++filePtr;
                            return;
                        } else if (!IsNumeric(*filePtr))
                            break;

                        SkipLine(&filePtr);
                    }
                } else {
                    SkipSpacesAndLineEnd(&filePtr);
                    ParseLV4MeshLong(numVerts);

                    // Reserve enough storage
                    curMesh->mBoneVertices.reserve(numVerts);

                    for (unsigned int i = 0; i < numVerts; ++i) {
                        SkipSpacesAndLineEnd(&filePtr);
                        unsigned int numWeights;
                        ParseLV4MeshLong(numWeights);

                        curMesh->mBoneVertices.emplace_back();
                        ASE::BoneVertex &vert = curMesh->mBoneVertices.back();

                        // Reserve enough storage
                        vert.mBoneWeights.reserve(numWeights);

                        std::string bone;
                        for (unsigned int w = 0; w < numWeights; ++w) {
                            bone.clear();
                            ParseString(bone, "*MESH_SOFTSKINVERTS.Bone");

                            // Find the bone in the mesh's list
                            std::pair<int, ai_real> me;
                            me.first = -1;

                            for (unsigned int n = 0; n < curMesh->mBones.size(); ++n) {
                                if (curMesh->mBones[n].mName == bone) {
                                    me.first = n;
                                    break;
                                }
                            }
                            if (-1 == me.first) {
                                // We don't have this bone yet, so add it to the list
                                me.first = static_cast<int>(curMesh->mBones.size());
                                curMesh->mBones.emplace_back(bone);
                            }
                            ParseLV4MeshFloat(me.second);

                            // Add the new bone weight to list
                            vert.mBoneWeights.push_back(me);
                        }
                    }
                }
            }
        }
        if (*filePtr == '\0')
            return;
        ++filePtr;
        SkipSpacesAndLineEnd(&filePtr);
    }
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV1SceneBlock() {
    AI_ASE_PARSER_INIT();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            if (TokenMatch(filePtr, "SCENE_BACKGROUND_STATIC", 23))

            {
                // parse a color triple and assume it is really the bg color
                ParseLV4MeshFloatTriple(&m_clrBackground.r);
                continue;
            }
            if (TokenMatch(filePtr, "SCENE_AMBIENT_STATIC", 20))

            {
                // parse a color triple and assume it is really the bg color
                ParseLV4MeshFloatTriple(&m_clrAmbient.r);
                continue;
            }
            if (TokenMatch(filePtr, "SCENE_FIRSTFRAME", 16)) {
                ParseLV4MeshLong(iFirstFrame);
                continue;
            }
            if (TokenMatch(filePtr, "SCENE_LASTFRAME", 15)) {
                ParseLV4MeshLong(iLastFrame);
                continue;
            }
            if (TokenMatch(filePtr, "SCENE_FRAMESPEED", 16)) {
                ParseLV4MeshLong(iFrameSpeed);
                continue;
            }
            if (TokenMatch(filePtr, "SCENE_TICKSPERFRAME", 19)) {
                ParseLV4MeshLong(iTicksPerFrame);
                continue;
            }
        }
        AI_ASE_HANDLE_TOP_LEVEL_SECTION();
    }
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV1MaterialListBlock() {
    AI_ASE_PARSER_INIT();

    unsigned int iMaterialCount = 0;
    unsigned int iOldMaterialCount = (unsigned int)m_vMaterials.size();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            if (TokenMatch(filePtr, "MATERIAL_COUNT", 14)) {
                ParseLV4MeshLong(iMaterialCount);

                // now allocate enough storage to hold all materials
                m_vMaterials.resize(iOldMaterialCount + iMaterialCount, Material("INVALID"));
                continue;
            }
            if (TokenMatch(filePtr, "MATERIAL", 8)) {
                unsigned int iIndex = 0;
                ParseLV4MeshLong(iIndex);

                if (iIndex >= iMaterialCount) {
                    LogWarning("Out of range: material index is too large");
                    iIndex = iMaterialCount - 1;
                    return;
                }

                // get a reference to the material
                Material &sMat = m_vMaterials[iIndex + iOldMaterialCount];
                // parse the material block
                ParseLV2MaterialBlock(sMat);
                continue;
            }
            if( iDepth == 1 ){
                // CRUDE HACK: support missing brace after "Ascii Scene Exporter v2.51"
                LogWarning("Missing closing brace in material list");
                --filePtr;
                return;
            }
        }
        AI_ASE_HANDLE_TOP_LEVEL_SECTION();
    }
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV2MaterialBlock(ASE::Material &mat) {
    AI_ASE_PARSER_INIT();

    unsigned int iNumSubMaterials = 0;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            if (TokenMatch(filePtr, "MATERIAL_NAME", 13)) {
                if (!ParseString(mat.mName, "*MATERIAL_NAME"))
                    SkipToNextToken();
                continue;
            }
            // ambient material color
            if (TokenMatch(filePtr, "MATERIAL_AMBIENT", 16)) {
                ParseLV4MeshFloatTriple(&mat.mAmbient.r);
                continue;
            }
            // diffuse material color
            if (TokenMatch(filePtr, "MATERIAL_DIFFUSE", 16)) {
                ParseLV4MeshFloatTriple(&mat.mDiffuse.r);
                continue;
            }
            // specular material color
            if (TokenMatch(filePtr, "MATERIAL_SPECULAR", 17)) {
                ParseLV4MeshFloatTriple(&mat.mSpecular.r);
                continue;
            }
            // material shading type
            if (TokenMatch(filePtr, "MATERIAL_SHADING", 16)) {
                if (TokenMatch(filePtr, "Blinn", 5)) {
                    mat.mShading = Discreet3DS::Blinn;
                } else if (TokenMatch(filePtr, "Phong", 5)) {
                    mat.mShading = Discreet3DS::Phong;
                } else if (TokenMatch(filePtr, "Flat", 4)) {
                    mat.mShading = Discreet3DS::Flat;
                } else if (TokenMatch(filePtr, "Wire", 4)) {
                    mat.mShading = Discreet3DS::Wire;
                } else {
                    // assume gouraud shading
                    mat.mShading = Discreet3DS::Gouraud;
                    SkipToNextToken();
                }
                continue;
            }
            // material transparency
            if (TokenMatch(filePtr, "MATERIAL_TRANSPARENCY", 21)) {
                ParseLV4MeshFloat(mat.mTransparency);
                mat.mTransparency = ai_real(1.0) - mat.mTransparency;
                continue;
            }
            // material self illumination
            if (TokenMatch(filePtr, "MATERIAL_SELFILLUM", 18)) {
                ai_real f = 0.0;
                ParseLV4MeshFloat(f);

                mat.mEmissive.r = f;
                mat.mEmissive.g = f;
                mat.mEmissive.b = f;
                continue;
            }
            // material shininess
            if (TokenMatch(filePtr, "MATERIAL_SHINE", 14)) {
                ParseLV4MeshFloat(mat.mSpecularExponent);
                mat.mSpecularExponent *= 15;
                continue;
            }
            // two-sided material
            if (TokenMatch(filePtr, "MATERIAL_TWOSIDED", 17)) {
                mat.mTwoSided = true;
                continue;
            }
            // material shininess strength
            if (TokenMatch(filePtr, "MATERIAL_SHINESTRENGTH", 22)) {
                ParseLV4MeshFloat(mat.mShininessStrength);
                continue;
            }
            // diffuse color map
            if (TokenMatch(filePtr, "MAP_DIFFUSE", 11)) {
                // parse the texture block
                ParseLV3MapBlock(mat.sTexDiffuse);
                continue;
            }
            // ambient color map
            if (TokenMatch(filePtr, "MAP_AMBIENT", 11)) {
                // parse the texture block
                ParseLV3MapBlock(mat.sTexAmbient);
                continue;
            }
            // specular color map
            if (TokenMatch(filePtr, "MAP_SPECULAR", 12)) {
                // parse the texture block
                ParseLV3MapBlock(mat.sTexSpecular);
                continue;
            }
            // opacity map
            if (TokenMatch(filePtr, "MAP_OPACITY", 11)) {
                // parse the texture block
                ParseLV3MapBlock(mat.sTexOpacity);
                continue;
            }
            // emissive map
            if (TokenMatch(filePtr, "MAP_SELFILLUM", 13)) {
                // parse the texture block
                ParseLV3MapBlock(mat.sTexEmissive);
                continue;
            }
            // bump map
            if (TokenMatch(filePtr, "MAP_BUMP", 8)) {
                // parse the texture block
                ParseLV3MapBlock(mat.sTexBump);
            }
            // specular/shininess map
            if (TokenMatch(filePtr, "MAP_SHINESTRENGTH", 17)) {
                // parse the texture block
                ParseLV3MapBlock(mat.sTexShininess);
                continue;
            }
            // number of submaterials
            if (TokenMatch(filePtr, "NUMSUBMTLS", 10)) {
                ParseLV4MeshLong(iNumSubMaterials);

                // allocate enough storage
                mat.avSubMaterials.resize(iNumSubMaterials, Material("INVALID SUBMATERIAL"));
            }
            // submaterial chunks
            if (TokenMatch(filePtr, "SUBMATERIAL", 11)) {

                unsigned int iIndex = 0;
                ParseLV4MeshLong(iIndex);

                if (iIndex >= iNumSubMaterials) {
                    LogWarning("Out of range: submaterial index is too large");
                    iIndex = iNumSubMaterials - 1;
                }

                // get a reference to the material
                if (iIndex < mat.avSubMaterials.size()) {
                    Material &sMat = mat.avSubMaterials[iIndex];

                    // parse the material block
                    ParseLV2MaterialBlock(sMat);
                }

                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("2", "*MATERIAL");
    }
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MapBlock(Texture &map) {
    AI_ASE_PARSER_INIT();

    // ***********************************************************
    // *BITMAP should not be there if *MAP_CLASS is not BITMAP,
    // but we need to expect that case ... if the path is
    // empty the texture won't be used later.
    // ***********************************************************
    bool parsePath = true;
    std::string temp;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            // type of map
            if (TokenMatch(filePtr, "MAP_CLASS", 9)) {
                temp.clear();
                if (!ParseString(temp, "*MAP_CLASS"))
                    SkipToNextToken();
                if (temp != "Bitmap" && temp != "Normal Bump") {
                    ASSIMP_LOG_WARN("ASE: Skipping unknown map type: ", temp);
                    parsePath = false;
                }
                continue;
            }
            // path to the texture
            if (parsePath && TokenMatch(filePtr, "BITMAP", 6)) {
                if (!ParseString(map.mMapName, "*BITMAP"))
                    SkipToNextToken();

                if (map.mMapName == "None") {
                    // Files with 'None' as map name are produced by
                    // an Maja to ASE exporter which name I forgot ..
                    ASSIMP_LOG_WARN("ASE: Skipping invalid map entry");
                    map.mMapName = std::string();
                }

                continue;
            }
            // offset on the u axis
            if (TokenMatch(filePtr, "UVW_U_OFFSET", 12)) {
                ParseLV4MeshFloat(map.mOffsetU);
                continue;
            }
            // offset on the v axis
            if (TokenMatch(filePtr, "UVW_V_OFFSET", 12)) {
                ParseLV4MeshFloat(map.mOffsetV);
                continue;
            }
            // tiling on the u axis
            if (TokenMatch(filePtr, "UVW_U_TILING", 12)) {
                ParseLV4MeshFloat(map.mScaleU);
                continue;
            }
            // tiling on the v axis
            if (TokenMatch(filePtr, "UVW_V_TILING", 12)) {
                ParseLV4MeshFloat(map.mScaleV);
                continue;
            }
            // rotation around the z-axis
            if (TokenMatch(filePtr, "UVW_ANGLE", 9)) {
                ParseLV4MeshFloat(map.mRotation);
                continue;
            }
            // map blending factor
            if (TokenMatch(filePtr, "MAP_AMOUNT", 10)) {
                ParseLV4MeshFloat(map.mTextureBlend);
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MAP_XXXXXX");
    }
    return;
}

// ------------------------------------------------------------------------------------------------
bool Parser::ParseString(std::string &out, const char *szName) {
    char szBuffer[1024];
    if (!SkipSpaces(&filePtr)) {

        ai_snprintf(szBuffer, 1024, "Unable to parse %s block: Unexpected EOL", szName);
        LogWarning(szBuffer);
        return false;
    }
    // there must be '"'
    if ('\"' != *filePtr) {

        ai_snprintf(szBuffer, 1024, "Unable to parse %s block: Strings are expected "
                                    "to be enclosed in double quotation marks",
                szName);
        LogWarning(szBuffer);
        return false;
    }
    ++filePtr;
    const char *sz = filePtr;
    while (true) {
        if ('\"' == *sz)
            break;
        else if ('\0' == *sz) {
            ai_snprintf(szBuffer, 1024, "Unable to parse %s block: Strings are expected to "
                                        "be enclosed in double quotation marks but EOF was reached before "
                                        "a closing quotation mark was encountered",
                    szName);
            LogWarning(szBuffer);
            return false;
        }
        sz++;
    }
    out = std::string(filePtr, (uintptr_t)sz - (uintptr_t)filePtr);
    filePtr = sz + 1;
    return true;
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV1ObjectBlock(ASE::BaseNode &node) {
    AI_ASE_PARSER_INIT();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // first process common tokens such as node name and transform
            // name of the mesh/node
            if (TokenMatch(filePtr, "NODE_NAME", 9)) {
                if (!ParseString(node.mName, "*NODE_NAME"))
                    SkipToNextToken();
                continue;
            }
            // name of the parent of the node
            if (TokenMatch(filePtr, "NODE_PARENT", 11)) {
                if (!ParseString(node.mParent, "*NODE_PARENT"))
                    SkipToNextToken();
                continue;
            }
            // transformation matrix of the node
            if (TokenMatch(filePtr, "NODE_TM", 7)) {
                ParseLV2NodeTransformBlock(node);
                continue;
            }
            // animation data of the node
            if (TokenMatch(filePtr, "TM_ANIMATION", 12)) {
                ParseLV2AnimationBlock(node);
                continue;
            }

            if (node.mType == BaseNode::Light) {
                // light settings
                if (TokenMatch(filePtr, "LIGHT_SETTINGS", 14)) {
                    ParseLV2LightSettingsBlock((ASE::Light &)node);
                    continue;
                }
                // type of the light source
                if (TokenMatch(filePtr, "LIGHT_TYPE", 10)) {
                    if (!ASSIMP_strincmp("omni", filePtr, 4)) {
                        ((ASE::Light &)node).mLightType = ASE::Light::OMNI;
                    } else if (!ASSIMP_strincmp("target", filePtr, 6)) {
                        ((ASE::Light &)node).mLightType = ASE::Light::TARGET;
                    } else if (!ASSIMP_strincmp("free", filePtr, 4)) {
                        ((ASE::Light &)node).mLightType = ASE::Light::FREE;
                    } else if (!ASSIMP_strincmp("directional", filePtr, 11)) {
                        ((ASE::Light &)node).mLightType = ASE::Light::DIRECTIONAL;
                    } else {
                        LogWarning("Unknown kind of light source");
                    }
                    continue;
                }
            } else if (node.mType == BaseNode::Camera) {
                // Camera settings
                if (TokenMatch(filePtr, "CAMERA_SETTINGS", 15)) {
                    ParseLV2CameraSettingsBlock((ASE::Camera &)node);
                    continue;
                } else if (TokenMatch(filePtr, "CAMERA_TYPE", 11)) {
                    if (!ASSIMP_strincmp("target", filePtr, 6)) {
                        ((ASE::Camera &)node).mCameraType = ASE::Camera::TARGET;
                    } else if (!ASSIMP_strincmp("free", filePtr, 4)) {
                        ((ASE::Camera &)node).mCameraType = ASE::Camera::FREE;
                    } else {
                        LogWarning("Unknown kind of camera");
                    }
                    continue;
                }
            } else if (node.mType == BaseNode::Mesh) {
                // mesh data
                // FIX: Older files use MESH_SOFTSKIN
                if (TokenMatch(filePtr, "MESH", 4) ||
                        TokenMatch(filePtr, "MESH_SOFTSKIN", 13)) {
                    ParseLV2MeshBlock((ASE::Mesh &)node);
                    continue;
                }
                // mesh material index
                if (TokenMatch(filePtr, "MATERIAL_REF", 12)) {
                    ParseLV4MeshLong(((ASE::Mesh &)node).iMaterialIndex);
                    continue;
                }
            }
        }
        AI_ASE_HANDLE_TOP_LEVEL_SECTION();
    }
    return;
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV2CameraSettingsBlock(ASE::Camera &camera) {
    AI_ASE_PARSER_INIT();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            if (TokenMatch(filePtr, "CAMERA_NEAR", 11)) {
                ParseLV4MeshFloat(camera.mNear);
                continue;
            }
            if (TokenMatch(filePtr, "CAMERA_FAR", 10)) {
                ParseLV4MeshFloat(camera.mFar);
                continue;
            }
            if (TokenMatch(filePtr, "CAMERA_FOV", 10)) {
                ParseLV4MeshFloat(camera.mFOV);
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("2", "CAMERA_SETTINGS");
    }
    return;
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV2LightSettingsBlock(ASE::Light &light) {
    AI_ASE_PARSER_INIT();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            if (TokenMatch(filePtr, "LIGHT_COLOR", 11)) {
                ParseLV4MeshFloatTriple(&light.mColor.r);
                continue;
            }
            if (TokenMatch(filePtr, "LIGHT_INTENS", 12)) {
                ParseLV4MeshFloat(light.mIntensity);
                continue;
            }
            if (TokenMatch(filePtr, "LIGHT_HOTSPOT", 13)) {
                ParseLV4MeshFloat(light.mAngle);
                continue;
            }
            if (TokenMatch(filePtr, "LIGHT_FALLOFF", 13)) {
                ParseLV4MeshFloat(light.mFalloff);
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("2", "LIGHT_SETTINGS");
    }
}

// ------------------------------------------------------------------------------------------------
void Parser::ParseLV2AnimationBlock(ASE::BaseNode &mesh) {
    AI_ASE_PARSER_INIT();

    ASE::Animation *anim = &mesh.mAnim;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            if (TokenMatch(filePtr, "NODE_NAME", 9)) {
                std::string temp;
                if (!ParseString(temp, "*NODE_NAME"))
                    SkipToNextToken();

                // If the name of the node contains .target it
                // represents an animated camera or spot light
                // target.
                if (std::string::npos != temp.find(".Target")) {
                    if ((mesh.mType != BaseNode::Camera || ((ASE::Camera &)mesh).mCameraType != ASE::Camera::TARGET) &&
                            (mesh.mType != BaseNode::Light || ((ASE::Light &)mesh).mLightType != ASE::Light::TARGET)) {

                        ASSIMP_LOG_ERROR("ASE: Found target animation channel "
                                         "but the node is neither a camera nor a spot light");
                        anim = nullptr;
                    } else
                        anim = &mesh.mTargetAnim;
                }
                continue;
            }

            // position keyframes
            if (TokenMatch(filePtr, "CONTROL_POS_TRACK", 17) ||
                    TokenMatch(filePtr, "CONTROL_POS_BEZIER", 18) ||
                    TokenMatch(filePtr, "CONTROL_POS_TCB", 15)) {
                if (!anim)
                    SkipSection();
                else
                    ParseLV3PosAnimationBlock(*anim);
                continue;
            }
            // scaling keyframes
            if (TokenMatch(filePtr, "CONTROL_SCALE_TRACK", 19) ||
                    TokenMatch(filePtr, "CONTROL_SCALE_BEZIER", 20) ||
                    TokenMatch(filePtr, "CONTROL_SCALE_TCB", 17)) {
                if (!anim || anim == &mesh.mTargetAnim) {
                    // Target animation channels may have no rotation channels
                    ASSIMP_LOG_ERROR("ASE: Ignoring scaling channel in target animation");
                    SkipSection();
                } else
                    ParseLV3ScaleAnimationBlock(*anim);
                continue;
            }
            // rotation keyframes
            if (TokenMatch(filePtr, "CONTROL_ROT_TRACK", 17) ||
                    TokenMatch(filePtr, "CONTROL_ROT_BEZIER", 18) ||
                    TokenMatch(filePtr, "CONTROL_ROT_TCB", 15)) {
                if (!anim || anim == &mesh.mTargetAnim) {
                    // Target animation channels may have no rotation channels
                    ASSIMP_LOG_ERROR("ASE: Ignoring rotation channel in target animation");
                    SkipSection();
                } else
                    ParseLV3RotAnimationBlock(*anim);
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("2", "TM_ANIMATION");
    }
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3ScaleAnimationBlock(ASE::Animation &anim) {
    AI_ASE_PARSER_INIT();
    unsigned int iIndex;

    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            bool b = false;

            // For the moment we're just reading the three floats -
            // we ignore the additional information for bezier's and TCBs

            // simple scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_SCALE_SAMPLE", 20)) {
                b = true;
                anim.mScalingType = ASE::Animation::TRACK;
            }

            // Bezier scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_BEZIER_SCALE_KEY", 24)) {
                b = true;
                anim.mScalingType = ASE::Animation::BEZIER;
            }
            // TCB scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_TCB_SCALE_KEY", 21)) {
                b = true;
                anim.mScalingType = ASE::Animation::TCB;
            }
            if (b) {
                anim.akeyScaling.emplace_back();
                aiVectorKey &key = anim.akeyScaling.back();
                ParseLV4MeshFloatTriple(&key.mValue.x, iIndex);
                key.mTime = (double)iIndex;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*CONTROL_POS_TRACK");
    }
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3PosAnimationBlock(ASE::Animation &anim) {
    AI_ASE_PARSER_INIT();
    unsigned int iIndex;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            bool b = false;

            // For the moment we're just reading the three floats -
            // we ignore the additional information for bezier's and TCBs

            // simple scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_POS_SAMPLE", 18)) {
                b = true;
                anim.mPositionType = ASE::Animation::TRACK;
            }

            // Bezier scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_BEZIER_POS_KEY", 22)) {
                b = true;
                anim.mPositionType = ASE::Animation::BEZIER;
            }
            // TCB scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_TCB_POS_KEY", 19)) {
                b = true;
                anim.mPositionType = ASE::Animation::TCB;
            }
            if (b) {
                anim.akeyPositions.emplace_back();
                aiVectorKey &key = anim.akeyPositions.back();
                ParseLV4MeshFloatTriple(&key.mValue.x, iIndex);
                key.mTime = (double)iIndex;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*CONTROL_POS_TRACK");
    }
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3RotAnimationBlock(ASE::Animation &anim) {
    AI_ASE_PARSER_INIT();
    unsigned int iIndex;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            bool b = false;

            // For the moment we're just reading the  floats -
            // we ignore the additional information for bezier's and TCBs

            // simple scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_ROT_SAMPLE", 18)) {
                b = true;
                anim.mRotationType = ASE::Animation::TRACK;
            }

            // Bezier scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_BEZIER_ROT_KEY", 22)) {
                b = true;
                anim.mRotationType = ASE::Animation::BEZIER;
            }
            // TCB scaling keyframe
            if (TokenMatch(filePtr, "CONTROL_TCB_ROT_KEY", 19)) {
                b = true;
                anim.mRotationType = ASE::Animation::TCB;
            }
            if (b) {
                anim.akeyRotations.emplace_back();
                aiQuatKey &key = anim.akeyRotations.back();
                aiVector3D v;
                ai_real f;
                ParseLV4MeshFloatTriple(&v.x, iIndex);
                ParseLV4MeshFloat(f);
                key.mTime = (double)iIndex;
                key.mValue = aiQuaternion(v, f);
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*CONTROL_ROT_TRACK");
    }
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV2NodeTransformBlock(ASE::BaseNode &mesh) {
    AI_ASE_PARSER_INIT();
    int mode = 0;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            // name of the node
            if (TokenMatch(filePtr, "NODE_NAME", 9)) {
                std::string temp;
                if (!ParseString(temp, "*NODE_NAME"))
                    SkipToNextToken();

                std::string::size_type s;
                if (temp == mesh.mName) {
                    mode = 1;
                } else if (std::string::npos != (s = temp.find(".Target")) &&
                           mesh.mName == temp.substr(0, s)) {
                    // This should be either a target light or a target camera
                    if ((mesh.mType == BaseNode::Light && ((ASE::Light &)mesh).mLightType == ASE::Light::TARGET) ||
                            (mesh.mType == BaseNode::Camera && ((ASE::Camera &)mesh).mCameraType == ASE::Camera::TARGET)) {
                        mode = 2;
                    } else {
                        ASSIMP_LOG_ERROR("ASE: Ignoring target transform, "
                                         "this is no spot light or target camera");
                    }
                } else {
                    ASSIMP_LOG_ERROR("ASE: Unknown node transformation: ", temp);
                    // mode = 0
                }
                continue;
            }
            if (mode) {
                // fourth row of the transformation matrix - and also the
                // only information here that is interesting for targets
                if (TokenMatch(filePtr, "TM_ROW3", 7)) {
                    ParseLV4MeshFloatTriple((mode == 1 ? mesh.mTransform[3] : &mesh.mTargetPosition.x));
                    continue;
                }
                if (mode == 1) {
                    // first row of the transformation matrix
                    if (TokenMatch(filePtr, "TM_ROW0", 7)) {
                        ParseLV4MeshFloatTriple(mesh.mTransform[0]);
                        continue;
                    }
                    // second row of the transformation matrix
                    if (TokenMatch(filePtr, "TM_ROW1", 7)) {
                        ParseLV4MeshFloatTriple(mesh.mTransform[1]);
                        continue;
                    }
                    // third row of the transformation matrix
                    if (TokenMatch(filePtr, "TM_ROW2", 7)) {
                        ParseLV4MeshFloatTriple(mesh.mTransform[2]);
                        continue;
                    }
                    // inherited position axes
                    if (TokenMatch(filePtr, "INHERIT_POS", 11)) {
                        unsigned int aiVal[3];
                        ParseLV4MeshLongTriple(aiVal);

                        for (unsigned int i = 0; i < 3; ++i)
                            mesh.inherit.abInheritPosition[i] = aiVal[i] != 0;
                        continue;
                    }
                    // inherited rotation axes
                    if (TokenMatch(filePtr, "INHERIT_ROT", 11)) {
                        unsigned int aiVal[3];
                        ParseLV4MeshLongTriple(aiVal);

                        for (unsigned int i = 0; i < 3; ++i)
                            mesh.inherit.abInheritRotation[i] = aiVal[i] != 0;
                        continue;
                    }
                    // inherited scaling axes
                    if (TokenMatch(filePtr, "INHERIT_SCL", 11)) {
                        unsigned int aiVal[3];
                        ParseLV4MeshLongTriple(aiVal);

                        for (unsigned int i = 0; i < 3; ++i)
                            mesh.inherit.abInheritScaling[i] = aiVal[i] != 0;
                        continue;
                    }
                }
            }
        }
        AI_ASE_HANDLE_SECTION("2", "*NODE_TM");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV2MeshBlock(ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();

    unsigned int iNumVertices = 0;
    unsigned int iNumFaces = 0;
    unsigned int iNumTVertices = 0;
    unsigned int iNumTFaces = 0;
    unsigned int iNumCVertices = 0;
    unsigned int iNumCFaces = 0;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            // Number of vertices in the mesh
            if (TokenMatch(filePtr, "MESH_NUMVERTEX", 14)) {
                ParseLV4MeshLong(iNumVertices);
                continue;
            }
            // Number of texture coordinates in the mesh
            if (TokenMatch(filePtr, "MESH_NUMTVERTEX", 15)) {
                ParseLV4MeshLong(iNumTVertices);
                continue;
            }
            // Number of vertex colors in the mesh
            if (TokenMatch(filePtr, "MESH_NUMCVERTEX", 15)) {
                ParseLV4MeshLong(iNumCVertices);
                continue;
            }
            // Number of regular faces in the mesh
            if (TokenMatch(filePtr, "MESH_NUMFACES", 13)) {
                ParseLV4MeshLong(iNumFaces);
                continue;
            }
            // Number of UVWed faces in the mesh
            if (TokenMatch(filePtr, "MESH_NUMTVFACES", 15)) {
                ParseLV4MeshLong(iNumTFaces);
                continue;
            }
            // Number of colored faces in the mesh
            if (TokenMatch(filePtr, "MESH_NUMCVFACES", 15)) {
                ParseLV4MeshLong(iNumCFaces);
                continue;
            }
            // mesh vertex list block
            if (TokenMatch(filePtr, "MESH_VERTEX_LIST", 16)) {
                ParseLV3MeshVertexListBlock(iNumVertices, mesh);
                continue;
            }
            // mesh face list block
            if (TokenMatch(filePtr, "MESH_FACE_LIST", 14)) {
                ParseLV3MeshFaceListBlock(iNumFaces, mesh);
                continue;
            }
            // mesh texture vertex list block
            if (TokenMatch(filePtr, "MESH_TVERTLIST", 14)) {
                ParseLV3MeshTListBlock(iNumTVertices, mesh);
                continue;
            }
            // mesh texture face block
            if (TokenMatch(filePtr, "MESH_TFACELIST", 14)) {
                ParseLV3MeshTFaceListBlock(iNumTFaces, mesh);
                continue;
            }
            // mesh color vertex list block
            if (TokenMatch(filePtr, "MESH_CVERTLIST", 14)) {
                ParseLV3MeshCListBlock(iNumCVertices, mesh);
                continue;
            }
            // mesh color face block
            if (TokenMatch(filePtr, "MESH_CFACELIST", 14)) {
                ParseLV3MeshCFaceListBlock(iNumCFaces, mesh);
                continue;
            }
            // mesh normals
            if (TokenMatch(filePtr, "MESH_NORMALS", 12)) {
                ParseLV3MeshNormalListBlock(mesh);
                continue;
            }
            // another mesh UV channel ...
            if (TokenMatch(filePtr, "MESH_MAPPINGCHANNEL", 19)) {
                unsigned int iIndex(0);
                ParseLV4MeshLong(iIndex);
                if (0 == iIndex) {
                    LogWarning("Mapping channel has an invalid index. Skipping UV channel");
                    // skip it ...
                    SkipSection();
                } else {
                    if (iIndex < 2) {
                        LogWarning("Mapping channel has an invalid index. Skipping UV channel");
                        // skip it ...
                        SkipSection();
                    }
                    if (iIndex > AI_MAX_NUMBER_OF_TEXTURECOORDS) {
                        LogWarning("Too many UV channels specified. Skipping channel ..");
                        // skip it ...
                        SkipSection();
                    } else {
                        // parse the mapping channel
                        ParseLV3MappingChannel(iIndex - 1, mesh);
                    }
                    continue;
                }
            }
            // mesh animation keyframe. Not supported
            if (TokenMatch(filePtr, "MESH_ANIMATION", 14)) {

                LogWarning("Found *MESH_ANIMATION element in ASE/ASK file. "
                           "Keyframe animation is not supported by Assimp, this element "
                           "will be ignored");
                //SkipSection();
                continue;
            }
            if (TokenMatch(filePtr, "MESH_WEIGHTS", 12)) {
                ParseLV3MeshWeightsBlock(mesh);
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("2", "*MESH");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshWeightsBlock(ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();

    unsigned int iNumVertices = 0, iNumBones = 0;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Number of bone vertices ...
            if (TokenMatch(filePtr, "MESH_NUMVERTEX", 14)) {
                ParseLV4MeshLong(iNumVertices);
                continue;
            }
            // Number of bones
            if (TokenMatch(filePtr, "MESH_NUMBONE", 12)) {
                ParseLV4MeshLong(iNumBones);
                continue;
            }
            // parse the list of bones
            if (TokenMatch(filePtr, "MESH_BONE_LIST", 14)) {
                ParseLV4MeshBones(iNumBones, mesh);
                continue;
            }
            // parse the list of bones vertices
            if (TokenMatch(filePtr, "MESH_BONE_VERTEX_LIST", 21)) {
                ParseLV4MeshBonesVertices(iNumVertices, mesh);
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_WEIGHTS");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshBones(unsigned int iNumBones, ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();
    mesh.mBones.resize(iNumBones, Bone("UNNAMED"));
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Mesh bone with name ...
            if (TokenMatch(filePtr, "MESH_BONE_NAME", 14)) {
                // parse an index ...
                if (SkipSpaces(&filePtr)) {
                    unsigned int iIndex = strtoul10(filePtr, &filePtr);
                    if (iIndex >= iNumBones) {
                        LogWarning("Bone index is out of bounds");
                        continue;
                    }
                    if (!ParseString(mesh.mBones[iIndex].mName, "*MESH_BONE_NAME"))
                        SkipToNextToken();
                    continue;
                }
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_BONE_LIST");
    }
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshBonesVertices(unsigned int iNumVertices, ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();
    mesh.mBoneVertices.resize(iNumVertices);
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Mesh bone vertex
            if (TokenMatch(filePtr, "MESH_BONE_VERTEX", 16)) {
                // read the vertex index
                unsigned int iIndex = strtoul10(filePtr, &filePtr);
                if (iIndex >= mesh.mPositions.size()) {
                    iIndex = (unsigned int)mesh.mPositions.size() - 1;
                    LogWarning("Bone vertex index is out of bounds. Using the largest valid "
                               "bone vertex index instead");
                }

                // --- ignored
                ai_real afVert[3];
                ParseLV4MeshFloatTriple(afVert);

                std::pair<int, float> pairOut;
                while (true) {
                    // first parse the bone index ...
                    if (!SkipSpaces(&filePtr)) break;
                    pairOut.first = strtoul10(filePtr, &filePtr);

                    // then parse the vertex weight
                    if (!SkipSpaces(&filePtr)) break;
                    filePtr = fast_atoreal_move<float>(filePtr, pairOut.second);

                    // -1 marks unused entries
                    if (-1 != pairOut.first) {
                        mesh.mBoneVertices[iIndex].mBoneWeights.push_back(pairOut);
                    }
                }
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("4", "*MESH_BONE_VERTEX");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshVertexListBlock(
        unsigned int iNumVertices, ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();

    // allocate enough storage in the array
    mesh.mPositions.resize(iNumVertices);
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Vertex entry
            if (TokenMatch(filePtr, "MESH_VERTEX", 11)) {

                aiVector3D vTemp;
                unsigned int iIndex;
                ParseLV4MeshFloatTriple(&vTemp.x, iIndex);

                if (iIndex >= iNumVertices) {
                    LogWarning("Invalid vertex index. It will be ignored");
                } else
                    mesh.mPositions[iIndex] = vTemp;
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_VERTEX_LIST");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshFaceListBlock(unsigned int iNumFaces, ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();

    // allocate enough storage in the face array
    mesh.mFaces.resize(iNumFaces);
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Face entry
            if (TokenMatch(filePtr, "MESH_FACE", 9)) {

                ASE::Face mFace;
                ParseLV4MeshFace(mFace);

                if (mFace.iFace >= iNumFaces) {
                    LogWarning("Face has an invalid index. It will be ignored");
                } else
                    mesh.mFaces[mFace.iFace] = mFace;
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_FACE_LIST");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshTListBlock(unsigned int iNumVertices,
        ASE::Mesh &mesh, unsigned int iChannel) {
    AI_ASE_PARSER_INIT();

    // allocate enough storage in the array
    mesh.amTexCoords[iChannel].resize(iNumVertices);
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Vertex entry
            if (TokenMatch(filePtr, "MESH_TVERT", 10)) {
                aiVector3D vTemp;
                unsigned int iIndex;
                ParseLV4MeshFloatTriple(&vTemp.x, iIndex);

                if (iIndex >= iNumVertices) {
                    LogWarning("Tvertex has an invalid index. It will be ignored");
                } else
                    mesh.amTexCoords[iChannel][iIndex] = vTemp;

                if (0.0f != vTemp.z) {
                    // we need 3 coordinate channels
                    mesh.mNumUVComponents[iChannel] = 3;
                }
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_TVERT_LIST");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshTFaceListBlock(unsigned int iNumFaces,
        ASE::Mesh &mesh, unsigned int iChannel) {
    AI_ASE_PARSER_INIT();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Face entry
            if (TokenMatch(filePtr, "MESH_TFACE", 10)) {
                unsigned int aiValues[3];
                unsigned int iIndex = 0;

                ParseLV4MeshLongTriple(aiValues, iIndex);
                if (iIndex >= iNumFaces || iIndex >= mesh.mFaces.size()) {
                    LogWarning("UV-Face has an invalid index. It will be ignored");
                } else {
                    // copy UV indices
                    mesh.mFaces[iIndex].amUVIndices[iChannel][0] = aiValues[0];
                    mesh.mFaces[iIndex].amUVIndices[iChannel][1] = aiValues[1];
                    mesh.mFaces[iIndex].amUVIndices[iChannel][2] = aiValues[2];
                }
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_TFACE_LIST");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MappingChannel(unsigned int iChannel, ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();

    unsigned int iNumTVertices = 0;
    unsigned int iNumTFaces = 0;
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Number of texture coordinates in the mesh
            if (TokenMatch(filePtr, "MESH_NUMTVERTEX", 15)) {
                ParseLV4MeshLong(iNumTVertices);
                continue;
            }
            // Number of UVWed faces in the mesh
            if (TokenMatch(filePtr, "MESH_NUMTVFACES", 15)) {
                ParseLV4MeshLong(iNumTFaces);
                continue;
            }
            // mesh texture vertex list block
            if (TokenMatch(filePtr, "MESH_TVERTLIST", 14)) {
                ParseLV3MeshTListBlock(iNumTVertices, mesh, iChannel);
                continue;
            }
            // mesh texture face block
            if (TokenMatch(filePtr, "MESH_TFACELIST", 14)) {
                ParseLV3MeshTFaceListBlock(iNumTFaces, mesh, iChannel);
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_MAPPING_CHANNEL");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshCListBlock(unsigned int iNumVertices, ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();

    // allocate enough storage in the array
    mesh.mVertexColors.resize(iNumVertices);
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Vertex entry
            if (TokenMatch(filePtr, "MESH_VERTCOL", 12)) {
                aiColor4D vTemp;
                vTemp.a = 1.0f;
                unsigned int iIndex;
                ParseLV4MeshFloatTriple(&vTemp.r, iIndex);

                if (iIndex >= iNumVertices) {
                    LogWarning("Vertex color has an invalid index. It will be ignored");
                } else
                    mesh.mVertexColors[iIndex] = vTemp;
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_CVERTEX_LIST");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshCFaceListBlock(unsigned int iNumFaces, ASE::Mesh &mesh) {
    AI_ASE_PARSER_INIT();
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;

            // Face entry
            if (TokenMatch(filePtr, "MESH_CFACE", 10)) {
                unsigned int aiValues[3];
                unsigned int iIndex = 0;

                ParseLV4MeshLongTriple(aiValues, iIndex);
                if (iIndex >= iNumFaces || iIndex >= mesh.mFaces.size()) {
                    LogWarning("UV-Face has an invalid index. It will be ignored");
                } else {
                    // copy color indices
                    mesh.mFaces[iIndex].mColorIndices[0] = aiValues[0];
                    mesh.mFaces[iIndex].mColorIndices[1] = aiValues[1];
                    mesh.mFaces[iIndex].mColorIndices[2] = aiValues[2];
                }
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_CFACE_LIST");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV3MeshNormalListBlock(ASE::Mesh &sMesh) {
    AI_ASE_PARSER_INIT();

    // Allocate enough storage for the normals
    sMesh.mNormals.resize(sMesh.mFaces.size() * 3, aiVector3D(0.f, 0.f, 0.f));
    unsigned int index, faceIdx = UINT_MAX;

    // FIXME: rewrite this and find out how to interpret the normals
    // correctly. This is crap.

    // Smooth the vertex and face normals together. The result
    // will be edgy then, but otherwise everything would be soft ...
    while (true) {
        if ('*' == *filePtr) {
            ++filePtr;
            if (faceIdx != UINT_MAX && TokenMatch(filePtr, "MESH_VERTEXNORMAL", 17)) {
                aiVector3D vNormal;
                ParseLV4MeshFloatTriple(&vNormal.x, index);
                if (faceIdx >= sMesh.mFaces.size())
                    continue;

                // Make sure we assign it to the correct face
                const ASE::Face &face = sMesh.mFaces[faceIdx];
                if (index == face.mIndices[0])
                    index = 0;
                else if (index == face.mIndices[1])
                    index = 1;
                else if (index == face.mIndices[2])
                    index = 2;
                else {
                    ASSIMP_LOG_ERROR("ASE: Invalid vertex index in MESH_VERTEXNORMAL section");
                    continue;
                }
                // We'll renormalize later
                sMesh.mNormals[faceIdx * 3 + index] += vNormal;
                continue;
            }
            if (TokenMatch(filePtr, "MESH_FACENORMAL", 15)) {
                aiVector3D vNormal;
                ParseLV4MeshFloatTriple(&vNormal.x, faceIdx);

                if (faceIdx >= sMesh.mFaces.size()) {
                    ASSIMP_LOG_ERROR("ASE: Invalid vertex index in MESH_FACENORMAL section");
                    continue;
                }

                // We'll renormalize later
                sMesh.mNormals[faceIdx * 3] += vNormal;
                sMesh.mNormals[faceIdx * 3 + 1] += vNormal;
                sMesh.mNormals[faceIdx * 3 + 2] += vNormal;
                continue;
            }
        }
        AI_ASE_HANDLE_SECTION("3", "*MESH_NORMALS");
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshFace(ASE::Face &out) {
    // skip spaces and tabs
    if (!SkipSpaces(&filePtr)) {
        LogWarning("Unable to parse *MESH_FACE Element: Unexpected EOL [#1]");
        SkipToNextToken();
        return;
    }

    // parse the face index
    out.iFace = strtoul10(filePtr, &filePtr);

    // next character should be ':'
    if (!SkipSpaces(&filePtr)) {
        // FIX: there are some ASE files which haven't got : here ....
        LogWarning("Unable to parse *MESH_FACE Element: Unexpected EOL. \':\' expected [#2]");
        SkipToNextToken();
        return;
    }
    // FIX: There are some ASE files which haven't got ':' here
    if (':' == *filePtr) ++filePtr;

    // Parse all mesh indices
    for (unsigned int i = 0; i < 3; ++i) {
        unsigned int iIndex = 0;
        if (!SkipSpaces(&filePtr)) {
            LogWarning("Unable to parse *MESH_FACE Element: Unexpected EOL");
            SkipToNextToken();
            return;
        }
        switch (*filePtr) {
        case 'A':
        case 'a':
            break;
        case 'B':
        case 'b':
            iIndex = 1;
            break;
        case 'C':
        case 'c':
            iIndex = 2;
            break;
        default:
            LogWarning("Unable to parse *MESH_FACE Element: Unexpected EOL. "
                       "A,B or C expected [#3]");
            SkipToNextToken();
            return;
        };
        ++filePtr;

        // next character should be ':'
        if (!SkipSpaces(&filePtr) || ':' != *filePtr) {
            LogWarning("Unable to parse *MESH_FACE Element: "
                       "Unexpected EOL. \':\' expected [#2]");
            SkipToNextToken();
            return;
        }

        ++filePtr;
        if (!SkipSpaces(&filePtr)) {
            LogWarning("Unable to parse *MESH_FACE Element: Unexpected EOL. "
                       "Vertex index ecpected [#4]");
            SkipToNextToken();
            return;
        }
        out.mIndices[iIndex] = strtoul10(filePtr, &filePtr);
    }

    // now we need to skip the AB, BC, CA blocks.
    while (true) {
        if ('*' == *filePtr) break;
        if (IsLineEnd(*filePtr)) {
            //iLineNumber++;
            return;
        }
        filePtr++;
    }

    // parse the smoothing group of the face
    if (TokenMatch(filePtr, "*MESH_SMOOTHING", 15)) {
        if (!SkipSpaces(&filePtr)) {
            LogWarning("Unable to parse *MESH_SMOOTHING Element: "
                       "Unexpected EOL. Smoothing group(s) expected [#5]");
            SkipToNextToken();
            return;
        }

        // Parse smoothing groups until we don't anymore see commas
        // FIX: There needn't always be a value, sad but true
        while (true) {
            if (*filePtr < '9' && *filePtr >= '0') {
                out.iSmoothGroup |= (1 << strtoul10(filePtr, &filePtr));
            }
            SkipSpaces(&filePtr);
            if (',' != *filePtr) {
                break;
            }
            ++filePtr;
            SkipSpaces(&filePtr);
        }
    }

    // *MESH_MTLID  is optional, too
    while (true) {
        if ('*' == *filePtr) {
            break;
        }
        if (IsLineEnd(*filePtr)) {
            return;
        }
        filePtr++;
    }

    if (TokenMatch(filePtr, "*MESH_MTLID", 11)) {
        if (!SkipSpaces(&filePtr)) {
            LogWarning("Unable to parse *MESH_MTLID Element: Unexpected EOL. "
                       "Material index expected [#6]");
            SkipToNextToken();
            return;
        }
        out.iMaterial = strtoul10(filePtr, &filePtr);
    }
    return;
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshLongTriple(unsigned int *apOut) {
    ai_assert(nullptr != apOut);

    for (unsigned int i = 0; i < 3; ++i)
        ParseLV4MeshLong(apOut[i]);
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshLongTriple(unsigned int *apOut, unsigned int &rIndexOut) {
    ai_assert(nullptr != apOut);

    // parse the index
    ParseLV4MeshLong(rIndexOut);

    // parse the three others
    ParseLV4MeshLongTriple(apOut);
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshFloatTriple(ai_real *apOut, unsigned int &rIndexOut) {
    ai_assert(nullptr != apOut);

    // parse the index
    ParseLV4MeshLong(rIndexOut);

    // parse the three others
    ParseLV4MeshFloatTriple(apOut);
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshFloatTriple(ai_real *apOut) {
    ai_assert(nullptr != apOut);

    for (unsigned int i = 0; i < 3; ++i) {
        ParseLV4MeshFloat(apOut[i]);
    }
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshFloat(ai_real &fOut) {
    // skip spaces and tabs
    if (!SkipSpaces(&filePtr)) {
        // LOG
        LogWarning("Unable to parse float: unexpected EOL [#1]");
        fOut = 0.0;
        ++iLineNumber;
        return;
    }
    // parse the first float
    filePtr = fast_atoreal_move<ai_real>(filePtr, fOut);
}
// ------------------------------------------------------------------------------------------------
void Parser::ParseLV4MeshLong(unsigned int &iOut) {
    // Skip spaces and tabs
    if (!SkipSpaces(&filePtr)) {
        // LOG
        LogWarning("Unable to parse long: unexpected EOL [#1]");
        iOut = 0;
        ++iLineNumber;
        return;
    }
    // parse the value
    iOut = strtoul10(filePtr, &filePtr);
}

#endif // ASSIMP_BUILD_NO_3DS_IMPORTER

#endif // !! ASSIMP_BUILD_NO_BASE_IMPORTER
