Sample of parsing Microsoft .sdkmesh format frequently used in samples

import_sdkmesh.h

#pragma  once

typedef unsigned long long u64;
typedef unsigned int u32;
typedef unsigned short u16;
typedef unsigned char u8;
typedef signed char i8;
typedef float f32;

#define MAX_PATH 260

#ifdef __cplusplus
#   define INLINE __forceinline
#else
#   define INLINE __inline
#endif

/* 104 bytes */
typedef struct sdkmesh_header
{
    u32 version;
    u8  big_end;

    u8  padding0;
    u16 padding1;

    u64 header_data_size;
    u64 helper_data_size;
    u64 buffer_data_size;

    u32 vb_count;
    u32 ib_count;

    u32 mesh_data_count;
    u32 segm_data_count;
    u32 anim_data_count;
    u32 mtrl_data_count;

    u64 vb_header_offset;
    u64 ib_header_offset;

    u64 mesh_data_offset;
    u64 segm_data_offset;
    u64 anim_data_offset;
    u64 mtrl_data_offset;

} sdkmesh_header;

/* 32 + 256 bytes */
typedef struct sdkmesh_vb_header
{
    u64 num_verts;
    u64 num_bytes;

    u64 vstride;
    u64 vformat[32];
    u64 voffset;

} sdkmesh_vb_header;

/* 32 bytes */
typedef struct sdkmesh_ib_header
{
    u64 num_idxes;
    u64 num_bytes;

    u32 iformat;
    u32 padding;
    u64 ioffset;

} sdkmesh_ib_header;

typedef struct sdkmesh_mesh_data
{
    i8  name[100];

    u8  vb_count;
    u8  padding0;
    u16 padding1;

    u32 vb_data[16];
    u32 ib_data;

    u32 segm_count;
    u32 bone_count;

    f32 bbox_center[3];
    f32 bbox_extend[3];

    u64 segm_data_offset;
    u64 bone_data_offset;

} sdkmesh_mesh_data;

typedef struct sdkmesh_segm_data
{
    i8  name[100];

    u32 mtrl_id;
    u32 prim_id;

    u64 idx_start;
    u64 idx_count;
    u64 vtx_start;
    u64 vtx_count;

} sdkmesh_segm_data;

typedef struct sdkmesh_anim_data
{
    i8  name[100];
    u32 mesh;

    u32 parent_data;
    u32 child_data;
    u32 sibling_data;

    f32 transform[16];

} sdkmesh_anim_data;

typedef struct sdkmesh_mtrl_data
{
    i8 name[100];

    i8 instance_path[MAX_PATH];

    i8 diff_tex_path[MAX_PATH];
    i8 norm_tex_path[MAX_PATH];
    i8 spec_tex_path[MAX_PATH];

    f32 diffuse_color[4];
    f32 ambient_color[4];
    f32 specular_color[4];
    f32 emissive_color[4];

    f32 power;
    u64 force[6];

} sdkmesh_mtrl_data;

#define declare_getter(name) \
    static INLINE sdkmesh_##name const * sdkmesh_get_##name(sdkmesh_header const * sdkmesh, u32 idx) \
    { \
        return (sdkmesh_##name const *)((u8 const *)sdkmesh + sdkmesh->name##_offset) + idx; \
    }

declare_getter(vb_header);
declare_getter(ib_header);

declare_getter(mesh_data);
declare_getter(segm_data);
declare_getter(mtrl_data);

static INLINE sdkmesh_segm_data * const sdkmesh_get_mesh_segm_data(sdkmesh_header const * sdkmesh, sdkmesh_mesh_data const * mesh, u32 idx)
{
    sdkmesh_segm_data const * segm_data = sdkmesh_get_segm_data(sdkmesh, 0);

    u32 * const segm_inds = (u32 const *)((u8 const *)sdkmesh + mesh->segm_data_offset);

    return segm_data + segm_inds[idx];
}

static INLINE u8 * const sdkmesh_get_vb_data(sdkmesh_header * const sdkmesh, u32 idx)
{
    return (u8 const *)sdkmesh + sdkmesh_get_vb_header(sdkmesh, idx)->voffset;
}

static INLINE u8 * const sdkmesh_get_ib_data(sdkmesh_header * const sdkmesh, u32 idx)
{
    return (u8 const *)sdkmesh + sdkmesh_get_ib_header(sdkmesh, idx)->ioffset;
}