/*

The MIT License (MIT)

Copyright (c) 2012-Present, Syoyo Fujita and many contributors.

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

*/

//

// version 2.0.0 : Add new object oriented API. 1.x API is still provided.

// * Add python binding.

// * Support line primitive.

// * Support points primitive.

// * Support multiple search path for .mtl(v1 API).

// * Support vertex skinning weight `vw`(as an tinyobj

// extension). Note that this differs vertex weight([w]

// component in `v` line)

// * Support escaped whitespece in mtllib

// * Add robust triangulation using Mapbox

// earcut(TINYOBJLOADER_USE_MAPBOX_EARCUT).

// version 1.4.0 : Modifed ParseTextureNameAndOption API

// version 1.3.1 : Make ParseTextureNameAndOption API public

// version 1.3.0 : Separate warning and error message(breaking API of LoadObj)

// version 1.2.3 : Added color space extension('-colorspace') to tex opts.

// version 1.2.2 : Parse multiple group names.

// version 1.2.1 : Added initial support for line('l') primitive(PR #178)

// version 1.2.0 : Hardened implementation(#175)

// version 1.1.1 : Support smoothing groups(#162)

// version 1.1.0 : Support parsing vertex color(#144)

// version 1.0.8 : Fix parsing `g` tag just after `usemtl`(#138)

// version 1.0.7 : Support multiple tex options(#126)

// version 1.0.6 : Add TINYOBJLOADER_USE_DOUBLE option(#124)

// version 1.0.5 : Ignore `Tr` when `d` exists in MTL(#43)

// version 1.0.4 : Support multiple filenames for 'mtllib'(#112)

// version 1.0.3 : Support parsing texture options(#85)

// version 1.0.2 : Improve parsing speed by about a factor of 2 for large

// files(#105)

// version 1.0.1 : Fixes a shape is lost if obj ends with a 'usemtl'(#104)

// version 1.0.0 : Change data structure. Change license from BSD to MIT.

//

//

// Use this in *one* .cc

// #define TINYOBJLOADER_IMPLEMENTATION

// #include "tiny_obj_loader.h"

//

#ifndef TINY_OBJ_LOADER_H_

#define TINY_OBJ_LOADER_H_

#include <map>

#include <string>

#include <vector>

namespace tinyobj {

// C++11 is now the minimum required standard.

#if __cplusplus < 201103L && (!defined(_MSVC_LANG) || _MSVC_LANG < 201103L)

#error "tinyobjloader requires C++11 or later. Compile with -std=c++11 or higher."

#endif

#define TINYOBJ_OVERRIDE override

#ifdef __clang__

#pragma clang diagnostic push

#if __has_warning("-Wzero-as-null-pointer-constant")

#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"

#endif

#pragma clang diagnostic ignored "-Wpadded"

#endif

// https://en.wikipedia.org/wiki/Wavefront_.obj_file says ...

//

// -blendu on | off # set horizontal texture blending

// (default on)

// -blendv on | off # set vertical texture blending

// (default on)

// -boost real_value # boost mip-map sharpness

// -mm base_value gain_value # modify texture map values (default

// 0 1)

// # base_value = brightness,

// gain_value = contrast

// -o u [v [w]] # Origin offset (default

// 0 0 0)

// -s u [v [w]] # Scale (default

// 1 1 1)

// -t u [v [w]] # Turbulence (default

// 0 0 0)

// -texres resolution # texture resolution to create

// -clamp on | off # only render texels in the clamped

// 0-1 range (default off)

// # When unclamped, textures are

// repeated across a surface,

// # when clamped, only texels which

// fall within the 0-1

// # range are rendered.

// -bm mult_value # bump multiplier (for bump maps

// only)

//

// -imfchan r | g | b | m | l | z # specifies which channel of the file

// is used to

// # create a scalar or bump texture.

// r:red, g:green,

// # b:blue, m:matte, l:luminance,

// z:z-depth..

// # (the default for bump is 'l' and

// for decal is 'm')

// bump -imfchan r bumpmap.tga # says to use the red channel of

// bumpmap.tga as the bumpmap

//

// For reflection maps...

//

// -type sphere # specifies a sphere for a "refl"

// reflection map

// -type cube_top | cube_bottom | # when using a cube map, the texture

// file for each

// cube_front | cube_back | # side of the cube is specified

// separately

// cube_left | cube_right

//

// TinyObjLoader extension.

//

// -colorspace SPACE # Color space of the texture. e.g.

// 'sRGB` or 'linear'

//

#ifdef TINYOBJLOADER_USE_DOUBLE

//#pragma message "using double"

typedef double real_t;

#else

//#pragma message "using float"

typedef float real_t;

#endif

typedef enum {

TEXTURE_TYPE_NONE, // default

TEXTURE_TYPE_SPHERE,

TEXTURE_TYPE_CUBE_TOP,

TEXTURE_TYPE_CUBE_BOTTOM,

TEXTURE_TYPE_CUBE_FRONT,

TEXTURE_TYPE_CUBE_BACK,

TEXTURE_TYPE_CUBE_LEFT,

TEXTURE_TYPE_CUBE_RIGHT

} texture_type_t;

struct texture_option_t {

texture_type_t type; // -type (default TEXTURE_TYPE_NONE)

real_t sharpness; // -boost (default 1.0?)

real_t brightness; // base_value in -mm option (default 0)

real_t contrast; // gain_value in -mm option (default 1)

real_t origin_offset[3]; // -o u [v [w]] (default 0 0 0)

real_t scale[3]; // -s u [v [w]] (default 1 1 1)

real_t turbulence[3]; // -t u [v [w]] (default 0 0 0)

int texture_resolution; // -texres resolution (No default value in the spec.

// We'll use -1)

bool clamp; // -clamp (default false)

char imfchan; // -imfchan (the default for bump is 'l' and for decal is 'm')

bool blendu; // -blendu (default on)

bool blendv; // -blendv (default on)

real_t bump_multiplier; // -bm (for bump maps only, default 1.0)

// extension

std::string colorspace; // Explicitly specify color space of stored texel

// value. Usually `sRGB` or `linear` (default empty).

};

struct material_t {

std::string name;

real_t ambient[3];

real_t diffuse[3];

real_t specular[3];

real_t transmittance[3];

real_t emission[3];

real_t shininess;

real_t ior; // index of refraction

real_t dissolve; // 1 == opaque; 0 == fully transparent

// illumination model (see http://www.fileformat.info/format/material/)

int illum;

int dummy; // Suppress padding warning.

std::string ambient_texname; // map_Ka. For ambient or ambient occlusion.

std::string diffuse_texname; // map_Kd

std::string specular_texname; // map_Ks

std::string specular_highlight_texname; // map_Ns

std::string bump_texname; // map_bump, map_Bump, bump

std::string displacement_texname; // disp

std::string alpha_texname; // map_d

std::string reflection_texname; // refl

texture_option_t ambient_texopt;

texture_option_t diffuse_texopt;

texture_option_t specular_texopt;

texture_option_t specular_highlight_texopt;

texture_option_t bump_texopt;

texture_option_t displacement_texopt;

texture_option_t alpha_texopt;

texture_option_t reflection_texopt;

// PBR extension

// http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr

real_t roughness; // [0, 1] default 0

real_t metallic; // [0, 1] default 0

real_t sheen; // [0, 1] default 0

real_t clearcoat_thickness; // [0, 1] default 0

real_t clearcoat_roughness; // [0, 1] default 0

real_t anisotropy; // aniso. [0, 1] default 0

real_t anisotropy_rotation; // anisor. [0, 1] default 0

real_t pad0;

std::string roughness_texname; // map_Pr

std::string metallic_texname; // map_Pm

std::string sheen_texname; // map_Ps

std::string emissive_texname; // map_Ke

std::string normal_texname; // norm. For normal mapping.

texture_option_t roughness_texopt;

texture_option_t metallic_texopt;

texture_option_t sheen_texopt;

texture_option_t emissive_texopt;

texture_option_t normal_texopt;

int pad2;

std::map<std::string, std::string> unknown_parameter;

#ifdef TINY_OBJ_LOADER_PYTHON_BINDING

// For pybind11

std::array<double, 3> GetDiffuse() {

std::array<double, 3> values;

values[0] = double(diffuse[0]);

values[1] = double(diffuse[1]);

values[2] = double(diffuse[2]);

return values;

}

std::array<double, 3> GetSpecular() {

std::array<double, 3> values;

values[0] = double(specular[0]);

values[1] = double(specular[1]);

values[2] = double(specular[2]);

return values;

}

std::array<double, 3> GetTransmittance() {

std::array<double, 3> values;

values[0] = double(transmittance[0]);

values[1] = double(transmittance[1]);

values[2] = double(transmittance[2]);

return values;

}

std::array<double, 3> GetEmission() {

std::array<double, 3> values;

values[0] = double(emission[0]);

values[1] = double(emission[1]);

values[2] = double(emission[2]);

return values;

}

std::array<double, 3> GetAmbient() {

std::array<double, 3> values;

values[0] = double(ambient[0]);

values[1] = double(ambient[1]);

values[2] = double(ambient[2]);

return values;

}

void SetDiffuse(std::array<double, 3> &a) {

diffuse[0] = real_t(a[0]);

diffuse[1] = real_t(a[1]);

diffuse[2] = real_t(a[2]);

}

void SetAmbient(std::array<double, 3> &a) {

ambient[0] = real_t(a[0]);

ambient[1] = real_t(a[1]);

ambient[2] = real_t(a[2]);

}

void SetSpecular(std::array<double, 3> &a) {

specular[0] = real_t(a[0]);

specular[1] = real_t(a[1]);

specular[2] = real_t(a[2]);

}

void SetTransmittance(std::array<double, 3> &a) {

transmittance[0] = real_t(a[0]);

transmittance[1] = real_t(a[1]);

transmittance[2] = real_t(a[2]);

}

std::string GetCustomParameter(const std::string &key) {

std::map<std::string, std::string>::const_iterator it =

unknown_parameter.find(key);

if (it != unknown_parameter.end()) {

return it->second;

}

return std::string();

}

#endif

};

struct tag_t {

std::string name;

std::vector<int> intValues;

std::vector<real_t> floatValues;

std::vector<std::string> stringValues;

};

struct joint_and_weight_t {

int joint_id;

real_t weight;

};

struct skin_weight_t {

int vertex_id; // Corresponding vertex index in `attrib_t::vertices`.

// Compared to `index_t`, this index must be positive and

// start with 0(does not allow relative indexing)

std::vector<joint_and_weight_t> weightValues;

};

// Index struct to support different indices for vtx/normal/texcoord.

// -1 means not used.

struct index_t {

int vertex_index;

int normal_index;

int texcoord_index;

};

struct mesh_t {

std::vector<index_t> indices;

std::vector<unsigned int>

num_face_vertices; // The number of vertices per

// face. 3 = triangle, 4 = quad, ...

std::vector<int> material_ids; // per-face material ID

std::vector<unsigned int> smoothing_group_ids; // per-face smoothing group

// ID(0 = off. positive value

// = group id)

std::vector<tag_t> tags; // SubD tag

};

// struct path_t {

// std::vector<int> indices; // pairs of indices for lines

//};

struct lines_t {

// Linear flattened indices.

std::vector<index_t> indices; // indices for vertices(poly lines)

std::vector<int> num_line_vertices; // The number of vertices per line.

};

struct points_t {

std::vector<index_t> indices; // indices for points

};

struct shape_t {

std::string name;

mesh_t mesh;

lines_t lines;

points_t points;

};

// Vertex attributes

struct attrib_t {

std::vector<real_t> vertices; // 'v'(xyz)

// For backward compatibility, we store vertex weight in separate array.

std::vector<real_t> vertex_weights; // 'v'(w)

std::vector<real_t> normals; // 'vn'

std::vector<real_t> texcoords; // 'vt'(uv)

// For backward compatibility, we store texture coordinate 'w' in separate

// array.

std::vector<real_t> texcoord_ws; // 'vt'(w)

std::vector<real_t> colors; // extension: vertex colors

//

// TinyObj extension.

//

// NOTE(syoyo): array index is based on the appearance order.

// To get a corresponding skin weight for a specific vertex id `vid`,

// Need to reconstruct a look up table: `skin_weight_t::vertex_id` == `vid`

// (e.g. using std::map, std::unordered_map)

std::vector<skin_weight_t> skin_weights;

attrib_t() {}

//

// For pybind11

//

const std::vector<real_t> &GetVertices() const { return vertices; }

const std::vector<real_t> &GetVertexWeights() const { return vertex_weights; }

};

struct callback_t {

// W is optional and set to 1 if there is no `w` item in `v` line

void (*vertex_cb)(void *user_data, real_t x, real_t y, real_t z, real_t w);

void (*vertex_color_cb)(void *user_data, real_t x, real_t y, real_t z,

real_t r, real_t g, real_t b, bool has_color);

void (*normal_cb)(void *user_data, real_t x, real_t y, real_t z);

// y and z are optional and set to 0 if there is no `y` and/or `z` item(s) in

// `vt` line.

void (*texcoord_cb)(void *user_data, real_t x, real_t y, real_t z);

// called per 'f' line. num_indices is the number of face indices(e.g. 3 for

// triangle, 4 for quad)

// 0 will be passed for undefined index in index_t members.

void (*index_cb)(void *user_data, index_t *indices, int num_indices);

// `name` material name, `material_id` = the array index of material_t[]. -1

// if

// a material not found in .mtl

void (*usemtl_cb)(void *user_data, const char *name, int material_id);

// `materials` = parsed material data.

void (*mtllib_cb)(void *user_data, const material_t *materials,

int num_materials);

// There may be multiple group names

void (*group_cb)(void *user_data, const char **names, int num_names);

void (*object_cb)(void *user_data, const char *name);

callback_t()

: vertex_cb(NULL),

vertex_color_cb(NULL),

normal_cb(NULL),

texcoord_cb(NULL),

index_cb(NULL),

usemtl_cb(NULL),

mtllib_cb(NULL),

group_cb(NULL),

object_cb(NULL) {}

};

class MaterialReader {

public:

MaterialReader() {}

virtual ~MaterialReader();

virtual bool operator()(const std::string &matId,

std::vector<material_t> *materials,

std::map<std::string, int> *matMap, std::string *warn,

std::string *err) = 0;

};

///

/// Read .mtl from a file.

///

class MaterialFileReader : public MaterialReader {

public:

// Path could contain separator(';' in Windows, ':' in Posix)

explicit MaterialFileReader(const std::string &mtl_basedir)

: m_mtlBaseDir(mtl_basedir) {}

virtual ~MaterialFileReader() TINYOBJ_OVERRIDE {}

virtual bool operator()(const std::string &matId,

std::vector<material_t> *materials,

std::map<std::string, int> *matMap, std::string *warn,

std::string *err) TINYOBJ_OVERRIDE;

private:

std::string m_mtlBaseDir;

};

///

/// Read .mtl from a stream.

///

class MaterialStreamReader : public MaterialReader {

public:

explicit MaterialStreamReader(std::istream &inStream)

: m_inStream(inStream) {}

virtual ~MaterialStreamReader() TINYOBJ_OVERRIDE {}

virtual bool operator()(const std::string &matId,

std::vector<material_t> *materials,

std::map<std::string, int> *matMap, std::string *warn,

std::string *err) TINYOBJ_OVERRIDE;

private:

std::istream &m_inStream;

};

// v2 API

struct ObjReaderConfig {

bool triangulate; // triangulate polygon?

// Currently not used.

// "simple" or empty: Create triangle fan

// "earcut": Use the algorithm based on Ear clipping

std::string triangulation_method;

/// Parse vertex color.

/// If vertex color is not present, its filled with default value.

/// false = no vertex color

/// This will increase memory of parsed .obj

bool vertex_color;

///

/// Search path to .mtl file.

/// Default = "" = search from the same directory of .obj file.

/// Valid only when loading .obj from a file.

///

std::string mtl_search_path;

ObjReaderConfig()

: triangulate(true), triangulation_method("simple"), vertex_color(true) {}

};

///

/// Wavefront .obj reader class(v2 API)

///

class ObjReader {

public:

ObjReader() : valid_(false) {}

///

/// Load .obj and .mtl from a file.

///

/// @param[in] filename wavefront .obj filename

/// @param[in] config Reader configuration

///

bool ParseFromFile(const std::string &filename,

const ObjReaderConfig &config = ObjReaderConfig());

///

/// Parse .obj from a text string.

/// Need to supply .mtl text string by `mtl_text`.

/// This function ignores `mtllib` line in .obj text.

///

/// @param[in] obj_text wavefront .obj filename

/// @param[in] mtl_text wavefront .mtl filename

/// @param[in] config Reader configuration

///

bool ParseFromString(const std::string &obj_text, const std::string &mtl_text,

const ObjReaderConfig &config = ObjReaderConfig());

///

/// .obj was loaded or parsed correctly.

///

bool Valid() const { return valid_; }

const attrib_t &GetAttrib() const { return attrib_; }

const std::vector<shape_t> &GetShapes() const { return shapes_; }

const std::vector<material_t> &GetMaterials() const { return materials_; }

///

/// Warning message(may be filled after `Load` or `Parse`)

///

const std::string &Warning() const { return warning_; }

///

/// Error message(filled when `Load` or `Parse` failed)

///

const std::string &Error() const { return error_; }

private:

bool valid_;

attrib_t attrib_;

std::vector<shape_t> shapes_;

std::vector<material_t> materials_;

std::string warning_;

std::string error_;

};

/// ==>>========= Legacy v1 API =============================================

/// Loads .obj from a file.

/// 'attrib', 'shapes' and 'materials' will be filled with parsed shape data

/// 'shapes' will be filled with parsed shape data

/// Returns true when loading .obj become success.

/// Returns warning message into `warn`, and error message into `err`

/// 'mtl_basedir' is optional, and used for base directory for .mtl file.

/// In default(`NULL'), .mtl file is searched from an application's working

/// directory.

/// 'triangulate' is optional, and used whether triangulate polygon face in .obj

/// or not.

/// Option 'default_vcols_fallback' specifies whether vertex colors should

/// always be defined, even if no colors are given (fallback to white).

bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,

std::vector<material_t> *materials, std::string *warn,

std::string *err, const char *filename,

const char *mtl_basedir = NULL, bool triangulate = true,

bool default_vcols_fallback = true);

/// Loads .obj from a file with custom user callback.

/// .mtl is loaded as usual and parsed material_t data will be passed to

/// `callback.mtllib_cb`.

/// Returns true when loading .obj/.mtl become success.

/// Returns warning message into `warn`, and error message into `err`

/// See `examples/callback_api/` for how to use this function.

bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback,

void *user_data = NULL,

MaterialReader *readMatFn = NULL,

std::string *warn = NULL, std::string *err = NULL);

/// Loads object from a std::istream, uses `readMatFn` to retrieve

/// std::istream for materials.

/// Returns true when loading .obj become success.

/// Returns warning and error message into `err`

bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,

std::vector<material_t> *materials, std::string *warn,

std::string *err, std::istream *inStream,

MaterialReader *readMatFn = NULL, bool triangulate = true,

bool default_vcols_fallback = true);

/// Loads materials into std::map

void LoadMtl(std::map<std::string, int> *material_map,

std::vector<material_t> *materials, std::istream *inStream,

std::string *warning, std::string *err);

///

/// Parse texture name and texture option for custom texture parameter through

/// material::unknown_parameter

///

/// @param[out] texname Parsed texture name

/// @param[out] texopt Parsed texopt

/// @param[in] linebuf Input string

///

bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt,

const char *linebuf);

/// =<<========== Legacy v1 API =============================================

} // namespace tinyobj

#endif // TINY_OBJ_LOADER_H_

#ifdef TINYOBJLOADER_IMPLEMENTATION

#include <cassert>

#include <cctype>

#include <climits>

#include <cmath>

#include <cstddef>

#include <cstdint>

#include <cerrno>

#include <cstdlib>

#include <cstring>

#include <fstream>

#include <limits>

#ifdef _WIN32

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#ifndef NOMINMAX

#define NOMINMAX

#endif

#include <windows.h>

#endif

#ifdef TINYOBJLOADER_USE_MMAP

#if !defined(_WIN32)

// POSIX headers for mmap

#include <fcntl.h>

#include <sys/mman.h>

#include <sys/stat.h>

#include <unistd.h>

#endif

#endif // TINYOBJLOADER_USE_MMAP

#include <set>

#include <sstream>

#include <utility>

#ifdef TINYOBJLOADER_USE_MAPBOX_EARCUT

#ifdef TINYOBJLOADER_DONOT_INCLUDE_MAPBOX_EARCUT

// Assume earcut.hpp is included outside of tiny_obj_loader.h

#else

#ifdef __clang__

#pragma clang diagnostic push

#pragma clang diagnostic ignored "-Weverything"

#endif

#include <array>

#include "mapbox/earcut.hpp"

#ifdef __clang__

#pragma clang diagnostic pop

#endif

#endif

#endif // TINYOBJLOADER_USE_MAPBOX_EARCUT

#ifdef _WIN32

// Converts a UTF-8 encoded string to a UTF-16 wide string for use with

// Windows file APIs that support Unicode paths (including paths longer than

// MAX_PATH when combined with the extended-length path prefix).

static std::wstring UTF8ToWchar(const std::string &str) {

if (str.empty()) return std::wstring();

int size_needed =

MultiByteToWideChar(CP_UTF8, 0, str.c_str(),

static_cast<int>(str.size()), NULL, 0);

if (size_needed == 0) return std::wstring();

std::wstring wstr(static_cast<size_t>(size_needed), L'\0');

int result =

MultiByteToWideChar(CP_UTF8, 0, str.c_str(),

static_cast<int>(str.size()), &wstr[0], size_needed);

if (result == 0) return std::wstring();

return wstr;

}

// Prepends the Windows extended-length path prefix ("\\?\") to an absolute

// path when the path length meets or exceeds MAX_PATH (260 characters).

// This allows Windows APIs to handle paths up to 32767 characters long.

// UNC paths (starting with "\\") are converted to "\\?\UNC\" form.

static std::wstring LongPathW(const std::wstring &wpath) {

const std::wstring kLongPathPrefix = L"\\\\?\\";

const std::wstring kUNCPrefix = L"\\\\";

const std::wstring kLongUNCPathPrefix = L"\\\\?\\UNC\\";

// Already has the extended-length prefix; return as-is.

if (wpath.size() >= kLongPathPrefix.size() &&

wpath.substr(0, kLongPathPrefix.size()) == kLongPathPrefix) {

return wpath;

}

// Only add the prefix when the path is long enough to require it.

if (wpath.size() < MAX_PATH) {

return wpath;

}

// Normalize forward slashes to backslashes: the extended-length "\\?\"

// prefix requires backslash separators only.

std::wstring normalized = wpath;

for (std::wstring::size_type i = 0; i < normalized.size(); ++i) {

if (normalized[i] == L'/') normalized[i] = L'\\';

}

// UNC path: "\\server\share\..." -> "\\?\UNC\server\share\..."

if (normalized.size() >= kUNCPrefix.size() &&

normalized.substr(0, kUNCPrefix.size()) == kUNCPrefix) {

return kLongUNCPathPrefix + normalized.substr(kUNCPrefix.size());

}

// Absolute path with drive letter: "C:\..." -> "\\?\C:\..."

if (normalized.size() >= 2 && normalized[1] == L':') {

return kLongPathPrefix + normalized;

}

return normalized;

}

#endif // _WIN32

// --------------------------------------------------------------------------

// Embedded fast_float v8.0.2 for high-performance, bit-exact float parsing.

// Disable by defining TINYOBJLOADER_DISABLE_FAST_FLOAT before including

// this file with TINYOBJLOADER_IMPLEMENTATION.

// --------------------------------------------------------------------------

#ifndef TINYOBJLOADER_DISABLE_FAST_FLOAT

// Standard headers needed by the embedded fast_float.

#include <cfloat>

#include <cstdint>

namespace tinyobj_ff {

// --- integral_constant, true_type, false_type ---

template <typename T, T V>

struct integral_constant {

static const T value = V;

typedef T value_type;

typedef integral_constant type;

operator value_type() const { return value; }

};

typedef integral_constant<bool, true> true_type;

typedef integral_constant<bool, false> false_type;

// --- is_same ---

template <typename T, typename U> struct is_same : false_type {};

template <typename T> struct is_same<T, T> : true_type {};

// --- enable_if ---

template <bool B, typename T = void> struct enable_if {};

template <typename T> struct enable_if<true, T> { typedef T type; };

// --- conditional ---

template <bool B, typename T, typename F> struct conditional { typedef T type; };

template <typename T, typename F> struct conditional<false, T, F> { typedef F type; };

// --- is_integral ---

template <typename T> struct is_integral : false_type {};

template <> struct is_integral<bool> : true_type {};

template <> struct is_integral<char> : true_type {};

template <> struct is_integral<signed char> : true_type {};

template <> struct is_integral<unsigned char> : true_type {};

template <> struct is_integral<short> : true_type {};

template <> struct is_integral<unsigned short> : true_type {};

template <> struct is_integral<int> : true_type {};

template <> struct is_integral<unsigned int> : true_type {};

template <> struct is_integral<long> : true_type {};

template <> struct is_integral<unsigned long> : true_type {};

template <> struct is_integral<long long> : true_type {};

template <> struct is_integral<unsigned long long> : true_type {};

template <> struct is_integral<wchar_t> : true_type {};

template <> struct is_integral<char16_t> : true_type {};

template <> struct is_integral<char32_t> : true_type {};

// --- is_signed ---

template <typename T> struct is_signed : integral_constant<bool, T(-1) < T(0)> {};

// --- underlying_type (uses compiler builtin) ---

template <typename T> struct underlying_type {

typedef __underlying_type(T) type;

};

// --- ff_errc (replaces std::errc, our own enum - no system_error needed) ---

enum class ff_errc { ok = 0, invalid_argument = 22, result_out_of_range = 34 };

// --- min_val (replaces std::min, avoids Windows min/max macro conflicts) ---

template <typename T>

inline T min_val(T a, T b) { return (b < a) ? b : a; }

// --- copy_n ---

template <typename InputIt, typename Size, typename OutputIt>

inline OutputIt copy_n(InputIt first, Size count, OutputIt result) {

for (Size i = 0; i < count; ++i) *result++ = *first++;

return result;

}

// --- copy_backward ---

template <typename BidirIt1, typename BidirIt2>

inline BidirIt2 copy_backward(BidirIt1 first, BidirIt1 last, BidirIt2 d_last) {

while (first != last) *(--d_last) = *(--last);

return d_last;

}

// --- fill ---

template <typename ForwardIt, typename T>

inline void fill(ForwardIt first, ForwardIt last, const T &value) {

for (; first != last; ++first) *first = value;

}

// --- distance ---

template <typename It>

inline typename conditional<true, long long, It>::type

distance(It first, It last) {

return last - first;

}

} // namespace tinyobj_ff

// --- Begin embedded fast_float v8.0.2 (MIT / Apache-2.0 / BSL-1.0) ---

// https://github.com/fastfloat/fast_float

// fast_float by Daniel Lemire

// fast_float by João Paulo Magalhaes

//

//

// with contributions from Eugene Golushkov

// with contributions from Maksim Kita

// with contributions from Marcin Wojdyr

// with contributions from Neal Richardson

// with contributions from Tim Paine

// with contributions from Fabio Pellacini

// with contributions from Lénárd Szolnoki

// with contributions from Jan Pharago

// with contributions from Maya Warrier

// with contributions from Taha Khokhar

// with contributions from Anders Dalvander

//

//

// Licensed under the Apache License, Version 2.0, or the

// MIT License or the Boost License. This file may not be copied,

// modified, or distributed except according to those terms.

//

// MIT License Notice

//

// MIT License

//

// Copyright (c) 2021 The fast_float authors

//

// Permission is hereby granted, free of charge, to any

// person obtaining a copy of this software and associated

// documentation files (the "Software"), to deal in the

// Software without restriction, including without

// limitation the rights to use, copy, modify, merge,

// publish, distribute, sublicense, and/or sell copies of

// the Software, and to permit persons to whom the Software

// is furnished to do so, subject to the following

// conditions:

//

// The above copyright notice and this permission notice

// shall be included in all copies or substantial portions

// of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF

// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED

// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A

// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT

// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR

// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

// DEALINGS IN THE SOFTWARE.

//

// Apache License (Version 2.0) Notice

//

// Copyright 2021 The fast_float authors

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

//

// BOOST License Notice

//

// Boost Software License - Version 1.0 - August 17th, 2003

//

// Permission is hereby granted, free of charge, to any person or organization

// obtaining a copy of the software and accompanying documentation covered by

// this license (the "Software") to use, reproduce, display, distribute,

// execute, and transmit the Software, and to prepare derivative works of the

// Software, and to permit third-parties to whom the Software is furnished to

// do so, all subject to the following:

//

// The copyright notices in the Software and this entire statement, including

// the above license grant, this restriction and the following disclaimer,

// must be included in all copies of the Software, in whole or in part, and

// all derivative works of the Software, unless such copies or derivative

// works are solely in the form of machine-executable object code generated by

// a source language processor.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT

// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE

// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,

// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

// DEALINGS IN THE SOFTWARE.

//

#ifndef FASTFLOAT_CONSTEXPR_FEATURE_DETECT_H

#define FASTFLOAT_CONSTEXPR_FEATURE_DETECT_H

#ifdef __has_include

#if __has_include(<version>)

#include <version>

#endif

#endif

// Testing for https://wg21.link/N3652, adopted in C++14

#if defined(__cpp_constexpr) && __cpp_constexpr >= 201304

#define FASTFLOAT_CONSTEXPR14 constexpr

#else

#define FASTFLOAT_CONSTEXPR14

#endif

#if defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806L

#define FASTFLOAT_HAS_BIT_CAST 1

#else

#define FASTFLOAT_HAS_BIT_CAST 0

#endif

#if defined(__cpp_lib_is_constant_evaluated) && \

__cpp_lib_is_constant_evaluated >= 201811L

#define FASTFLOAT_HAS_IS_CONSTANT_EVALUATED 1

#else

#define FASTFLOAT_HAS_IS_CONSTANT_EVALUATED 0

#endif

#if defined(__cpp_if_constexpr) && __cpp_if_constexpr >= 201606L

#define FASTFLOAT_IF_CONSTEXPR17(x) if constexpr (x)

#else

#define FASTFLOAT_IF_CONSTEXPR17(x) if (x)

#endif