// Copyright Contributors to the OpenVDB Project
// SPDX-License-Identifier: MPL-2.0

/// @file openvdb/version.h
/// @brief Library and file format version numbers
///
/// @details
/// When the library is built with the latest ABI, its namespace has the form
/// <B>openvdb::vX_Y</B>, where @e X and @e Y are the major and minor version
/// numbers.
///
/// The library can be built using an older ABI by changing the value of the
/// @b OPENVDB_ABI_VERSION_NUMBER. (e.g., via <TT>-DOPENVDB_ABI_VERSION_NUMBER=<I>N</I></TT>).
/// In that case, the namespace has the form <B>openvdb::vX_YabiN</B>,
/// where N is the ABI version number.
///
/// The ABI version must be set consistently when building code that depends on
/// OpenVDB.
///
/// The ABI version number defaults to the library major version number, which
/// gets incremented whenever changes are made to the ABI of the Grid class or
/// related classes (Tree, Transform, Metadata, etc.). Setting the ABI version
/// number to an earlier library version number disables grid ABI changes made
/// since that library version.
///
/// The library minor version number gets incremented whenever a change is made
/// to any aspect of the public API (not just the grid API) that necessitates
/// changes to client code.  Changes to APIs in private or internal namespaces
/// do not trigger a minor version number increment; such APIs should not be
/// used in client code.
///
/// A patch version number increment indicates a change&mdash;usually a new
/// feature or a bug fix&mdash;that does not necessitate changes to client code
/// but rather only recompilation of that code (because the library namespace
/// incorporates the version number).
///
/// The file format version number gets incremented when it becomes possible to
/// write files that cannot safely be read with older versions of the library.
/// Not all files written in a newer format are incompatible with older
/// libraries, however. And in general, files containing grids of unknown type
/// can be read safely, although the unknown grids will not be accessible.

#ifndef OPENVDB_VERSION_HAS_BEEN_INCLUDED
#define OPENVDB_VERSION_HAS_BEEN_INCLUDED

#include "openvdb/Platform.h"

#include <cstddef> // size_t
#include <cstdint> // uint32_t

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////

// Auto generated build configurations from CMake

///@{
/// @brief Library major, minor and patch version numbers
/// @hideinitializer
#define OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER 8
/// @hideinitializer
#define OPENVDB_LIBRARY_MINOR_VERSION_NUMBER 1
/// @hideinitializer
#define OPENVDB_LIBRARY_PATCH_VERSION_NUMBER 0
///@}

/// @note  This ifndef exists for compatibility with older versions of OpenVDB.
///   This value should never be different from the value configured when
///   OpenVDB was built, but this previously needed to be defined by downstream
///   software. Redefining it here would cause build failures, so this allows
///   users to transition and remove the define in their build systems.
#ifndef OPENVDB_ABI_VERSION_NUMBER
/// @brief The ABI version that OpenVDB was built with
/// @hideinitializer
#define OPENVDB_ABI_VERSION_NUMBER 8
#endif

/// @brief Library version number string of the form "<major>.<minor>.<patch>"
/// @details This is a macro rather than a static constant because we typically
/// want the compile-time version number, not the runtime version number
/// (although the two are usually the same).
/// @hideinitializer
#define OPENVDB_LIBRARY_VERSION_STRING "8.1.0"

/// @brief Library version number string of the form "<major>.<minor>.<patch>abi<abi>"
/// @details This is a macro rather than a static constant because we typically
/// want the compile-time version number, not the runtime version number
/// (although the two are usually the same).
/// @hideinitializer
#define OPENVDB_LIBRARY_ABI_VERSION_STRING "8.1.0abi8"

/// @brief Library version number as a packed integer ("%02x%02x%04x", major, minor, patch)
/// @hideinitializer
#define OPENVDB_LIBRARY_VERSION_NUMBER 134283264

/// @brief The version namespace name for this library version
/// @hideinitializer
///
/// When the ABI version number matches the library major version number,
/// symbols are named as in the following examples:
/// - @b openvdb::vX_Y::Vec3i
/// - @b openvdb::vX_Y::io::File
/// - @b openvdb::vX_Y::tree::Tree
///
/// where X and Y are the major and minor version numbers.
///
/// When the ABI version number does not match the library major version number,
/// symbol names include the ABI version:
/// - @b openvdb::vX_YabiN::Vec3i
/// - @b openvdb::vX_YabiN::io::File
/// - @b openvdb::vX_YabiN::tree::Tree
///
/// where X, Y and N are the major, minor and ABI version numbers, respectively.
#if OPENVDB_ABI_VERSION_NUMBER == OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER
    #define OPENVDB_VERSION_NAME v8_1
#else
    #define OPENVDB_VERSION_NAME v8_1abi8
#endif

/* Denotes whether VDB was built with IMath Half support */
#ifndef OPENVDB_USE_IMATH_HALF
/* #undef OPENVDB_USE_IMATH_HALF */
#endif

/* Denotes whether VDB was built with Blosc support */
#ifndef OPENVDB_USE_BLOSC
#define OPENVDB_USE_BLOSC
#endif

/* Denotes whether VDB was built with ZLIB support */
#ifndef OPENVDB_USE_ZLIB
#define OPENVDB_USE_ZLIB
#endif


///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////


#if OPENVDB_ABI_VERSION_NUMBER > OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER
    // If using a future OPENVDB_ABI_VERSION_NUMBER, issue a message directive.
    // This can be suppressed by defining OPENVDB_USE_FUTURE_ABI_<VERSION>=ON.
    // Note that, whilst the VDB CMake does not allow this option to be hit,
    // it exists to propagate this message to downstream targets
    #if OPENVDB_ABI_VERSION_NUMBER == 9
        #ifndef OPENVDB_USE_FUTURE_ABI_9
            PRAGMA(message("NOTE: ABI = 9 is still in active development and has not been finalized, "
                "define OPENVDB_USE_FUTURE_ABI_9 to suppress this message"))
        #endif
    #else
        #error expected OPENVDB_ABI_VERSION_NUMBER <= OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER
    #endif
#endif

// If using an OPENVDB_ABI_VERSION_NUMBER that has been deprecated, issue a message
// directive. This can be suppressed by defining OPENVDB_USE_DEPRECATED_ABI_<VERSION>.
// Note that, whilst the VDB CMake does not allow this option to be hit,
// it exists to propagate this message to downstream targets
#ifndef OPENVDB_USE_DEPRECATED_ABI_6
    #if OPENVDB_ABI_VERSION_NUMBER == 6
        PRAGMA(message("NOTE: ABI = 6 is deprecated, define OPENVDB_USE_DEPRECATED_ABI_6 "
            "to suppress this message"))
    #endif
#endif

/// By default, the @b OPENVDB_REQUIRE_VERSION_NAME macro is undefined, and
/// symbols from the version namespace are promoted to the top-level namespace
/// so that, for example, @b openvdb::v5_0::io::File can be referred to
/// simply as @b openvdb::io::File.
///
/// When @b OPENVDB_REQUIRE_VERSION_NAME is defined, symbols must be
/// fully namespace-qualified.
/// @hideinitializer
#ifdef OPENVDB_REQUIRE_VERSION_NAME
#define OPENVDB_USE_VERSION_NAMESPACE
#else
// The empty namespace clause below ensures that OPENVDB_VERSION_NAME
// is recognized as a namespace name.
#define OPENVDB_USE_VERSION_NAMESPACE \
    namespace OPENVDB_VERSION_NAME {} \
    using namespace OPENVDB_VERSION_NAME;
#endif


namespace openvdb {
OPENVDB_USE_VERSION_NAMESPACE
namespace OPENVDB_VERSION_NAME {

/// @brief The magic number is stored in the first four bytes of every VDB file.
/// @details This can be used to quickly test whether we have a valid file or not.
const int32_t OPENVDB_MAGIC = 0x56444220;

/// Library major, minor and patch version numbers
/// @hideinitializer
const uint32_t
    OPENVDB_LIBRARY_MAJOR_VERSION = OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER,
    OPENVDB_LIBRARY_MINOR_VERSION = OPENVDB_LIBRARY_MINOR_VERSION_NUMBER,
    OPENVDB_LIBRARY_PATCH_VERSION = OPENVDB_LIBRARY_PATCH_VERSION_NUMBER;
/// Library version number as a packed integer ("%02x%02x%04x", major, minor, patch)
/// @hideinitializer
const uint32_t OPENVDB_LIBRARY_VERSION = OPENVDB_LIBRARY_VERSION_NUMBER;
/// ABI version number
/// @hideinitializer
const uint32_t OPENVDB_ABI_VERSION = OPENVDB_ABI_VERSION_NUMBER;

/// @brief The current version number of the VDB file format
/// @details  This can be used to enable various backwards compatibility switches
/// or to reject files that cannot be read.
const uint32_t OPENVDB_FILE_VERSION = 224;

/// Notable file format version numbers
enum {
    OPENVDB_FILE_VERSION_ROOTNODE_MAP = 213,
    OPENVDB_FILE_VERSION_INTERNALNODE_COMPRESSION = 214,
    OPENVDB_FILE_VERSION_SIMPLIFIED_GRID_TYPENAME = 215,
    OPENVDB_FILE_VERSION_GRID_INSTANCING = 216,
    OPENVDB_FILE_VERSION_BOOL_LEAF_OPTIMIZATION = 217,
    OPENVDB_FILE_VERSION_BOOST_UUID = 218,
    OPENVDB_FILE_VERSION_NO_GRIDMAP = 219,
    OPENVDB_FILE_VERSION_NEW_TRANSFORM = 219,
    OPENVDB_FILE_VERSION_SELECTIVE_COMPRESSION = 220,
    OPENVDB_FILE_VERSION_FLOAT_FRUSTUM_BBOX = 221,
    OPENVDB_FILE_VERSION_NODE_MASK_COMPRESSION = 222,
    OPENVDB_FILE_VERSION_BLOSC_COMPRESSION = 223,
    OPENVDB_FILE_VERSION_POINT_INDEX_GRID = 223,
    OPENVDB_FILE_VERSION_MULTIPASS_IO = 224
};


/// Return a library version number string of the form "<major>.<minor>.<patch>".
inline constexpr const char* getLibraryVersionString() { return OPENVDB_LIBRARY_VERSION_STRING; }
/// Return a library version number string of the form "<major>.<minor>.<patch>abi<abi>".
inline constexpr const char* getLibraryAbiVersionString() {
    return OPENVDB_LIBRARY_ABI_VERSION_STRING;
}


struct VersionId {
    uint32_t first, second;
    VersionId(): first(0), second(0) {}
    VersionId(uint32_t major, uint32_t minor): first(major), second(minor) {}
};

} // namespace OPENVDB_VERSION_NAME
} // namespace openvdb

#endif // OPENVDB_VERSION_HAS_BEEN_INCLUDED
