# PhysicsFS; a portable, flexible file i/o abstraction.
#
# Please see the file LICENSE.txt in the source's root directory.

# The CMake project file is meant to get this compiling on all sorts of
#  platforms quickly, and serve as the way Unix platforms and Linux distros
#  package up official builds, but you don't _need_ to use this; we have
#  built PhysicsFS to (hopefully) be able to drop into your project and
#  compile, using preprocessor checks for platform-specific bits instead of
#  testing in here.

set(PHYSFS_VERSION 3.2.0)

cmake_minimum_required(VERSION 3.0)

project(PhysicsFS VERSION ${PHYSFS_VERSION} LANGUAGES C )

include(GNUInstallDirs)

# Increment this if/when we break backwards compatibility.
set(PHYSFS_SOVERSION 1)

set(PHYSFS_M_SRCS)
set(PHYSFS_CPP_SRCS)

# I hate that they define "WIN32" ... we're about to move to Win64...I hope!

if(APPLE)
    set(OTHER_LDFLAGS ${OTHER_LDFLAGS} "-framework IOKit -framework Foundation")
    list(APPEND PHYSFS_M_SRCS src/physfs_platform_apple.m)
endif()

if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
    add_compile_options(-Wall)
    # Don't use -rpath.
    set(CMAKE_SKIP_RPATH ON CACHE BOOL "Skip RPATH" FORCE)
endif()

if(CMAKE_C_COMPILER_ID STREQUAL "SunPro")
    add_definitions(-erroff=E_EMPTY_TRANSLATION_UNIT)
    add_definitions(-xldscope=hidden)
endif()

if(HAIKU)
    # We add this explicitly, since we don't want CMake to think this
    #  is a C++ project unless we're on Haiku.
    list(APPEND PHYSFS_CPP_SRCS src/physfs_platform_haiku.cpp)
    find_library(BE_LIBRARY be)
    find_library(ROOT_LIBRARY root)
    list(APPEND OPTIONAL_LIBRARY_LIBS ${BE_LIBRARY} ${ROOT_LIBRARY})
endif()

if(CMAKE_SYSTEM_NAME STREQUAL "WindowsPhone" OR CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
    set(WINRT TRUE)
endif()

if(WINRT)
    list(APPEND PHYSFS_CPP_SRCS src/physfs_platform_winrt.cpp)
endif()

if(UNIX AND NOT WIN32 AND NOT APPLE)  # (MingW and such might be UNIX _and_ WINDOWS!)
    find_library(PTHREAD_LIBRARY pthread)
    if(PTHREAD_LIBRARY)
        set(OPTIONAL_LIBRARY_LIBS ${OPTIONAL_LIBRARY_LIBS} ${PTHREAD_LIBRARY})
    endif()
endif()

if(PHYSFS_CPP_SRCS)
    enable_language(CXX)
endif()

# Almost everything is "compiled" here, but things that don't apply to the
#  build are #ifdef'd out. This is to make it easy to embed PhysicsFS into
#  another project or bring up a new build system: just compile all the source
#  code and #define the things you want.
set(PHYSFS_SRCS
    src/physfs.c
    src/physfs_byteorder.c
    src/physfs_unicode.c
    src/physfs_platform_posix.c
    src/physfs_platform_unix.c
    src/physfs_platform_windows.c
    src/physfs_platform_os2.c
    src/physfs_platform_qnx.c
    src/physfs_platform_android.c
    src/physfs_archiver_dir.c
    src/physfs_archiver_unpacked.c
    src/physfs_archiver_grp.c
    src/physfs_archiver_hog.c
    src/physfs_archiver_7z.c
    src/physfs_archiver_mvl.c
    src/physfs_archiver_qpak.c
    src/physfs_archiver_wad.c
    src/physfs_archiver_zip.c
    src/physfs_archiver_slb.c
    src/physfs_archiver_iso9660.c
    src/physfs_archiver_vdf.c
    ${PHYSFS_CPP_SRCS}
    ${PHYSFS_M_SRCS}
)


# Archivers ...
# These are (mostly) on by default now, so these options are only useful for
#  disabling them.

option(PHYSFS_ARCHIVE_ZIP "Enable ZIP support" TRUE)
if(NOT PHYSFS_ARCHIVE_ZIP)
    add_definitions(-DPHYSFS_SUPPORTS_ZIP=0)
endif()

option(PHYSFS_ARCHIVE_7Z "Enable 7zip support" TRUE)
if(NOT PHYSFS_ARCHIVE_7Z)
    add_definitions(-DPHYSFS_SUPPORTS_7Z=0)
endif()

option(PHYSFS_ARCHIVE_GRP "Enable Build Engine GRP support" TRUE)
if(NOT PHYSFS_ARCHIVE_GRP)
    add_definitions(-DPHYSFS_SUPPORTS_GRP=0)
endif()

option(PHYSFS_ARCHIVE_WAD "Enable Doom WAD support" TRUE)
if(NOT PHYSFS_ARCHIVE_WAD)
    add_definitions(-DPHYSFS_SUPPORTS_WAD=0)
endif()

option(PHYSFS_ARCHIVE_HOG "Enable Descent I/II HOG support" TRUE)
if(NOT PHYSFS_ARCHIVE_HOG)
    add_definitions(-DPHYSFS_SUPPORTS_HOG=0)
endif()

option(PHYSFS_ARCHIVE_MVL "Enable Descent I/II MVL support" TRUE)
if(NOT PHYSFS_ARCHIVE_MVL)
    add_definitions(-DPHYSFS_SUPPORTS_MVL=0)
endif()

option(PHYSFS_ARCHIVE_QPAK "Enable Quake I/II QPAK support" TRUE)
if(NOT PHYSFS_ARCHIVE_QPAK)
    add_definitions(-DPHYSFS_SUPPORTS_QPAK=0)
endif()

option(PHYSFS_ARCHIVE_SLB "Enable I-War / Independence War SLB support" TRUE)
if(NOT PHYSFS_ARCHIVE_SLB)
    add_definitions(-DPHYSFS_SUPPORTS_SLB=0)
endif()

option(PHYSFS_ARCHIVE_ISO9660 "Enable ISO9660 support" TRUE)
if(NOT PHYSFS_ARCHIVE_ISO9660)
    add_definitions(-DPHYSFS_SUPPORTS_ISO9660=0)
endif()

option(PHYSFS_ARCHIVE_VDF "Enable Gothic I/II VDF archive support" TRUE)
if(NOT PHYSFS_ARCHIVE_VDF)
    add_definitions(-DPHYSFS_SUPPORTS_VDF=0)
endif()


option(PHYSFS_BUILD_STATIC "Build static library" TRUE)
if(PHYSFS_BUILD_STATIC)
    add_library(physfs-static STATIC ${PHYSFS_SRCS})
    add_library(PhysFS::PhysFS-static ALIAS physfs-static)
    set_target_properties(physfs-static PROPERTIES EXPORT_NAME PhysFS-static)
    # Don't rename this on Windows, since DLLs will also produce an import
    #  library named "physfs.lib" which would conflict; Unix tend to like the
    #  same library name with a different extension for static libs, but
    #  Windows can just have a separate name.
    if(NOT MSVC)
        set_target_properties(physfs-static PROPERTIES OUTPUT_NAME "physfs")
    endif()
    if(WINRT)
        # Ignore LNK4264 warnings; we don't author any WinRT components, just consume them, so we're okay in a static library.
		set_target_properties(physfs-static PROPERTIES VS_WINRT_COMPONENT True)
        set_target_properties(physfs-static PROPERTIES STATIC_LIBRARY_FLAGS "/ignore:4264")
    endif()
    if(WIN32 OR WINRT OR OS2)
        # no dll exports from the static library
        target_compile_definitions(physfs-static PRIVATE "PHYSFS_STATIC")
    endif()
    target_include_directories(physfs-static PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>")
    target_link_libraries(physfs-static PRIVATE ${OPTIONAL_LIBRARY_LIBS} ${OTHER_LDFLAGS})
    set(PHYSFS_LIB_TARGET physfs-static)
    list(APPEND PHYSFS_INSTALL_TARGETS "physfs-static")
endif()

option(PHYSFS_BUILD_SHARED "Build shared library" TRUE)
if(PHYSFS_BUILD_SHARED)
    add_library(physfs SHARED ${PHYSFS_SRCS})
    add_library(PhysFS::PhysFS ALIAS physfs)
    set_target_properties(physfs PROPERTIES MACOSX_RPATH 1)
    set_target_properties(physfs PROPERTIES VERSION ${PHYSFS_VERSION})
    set_target_properties(physfs PROPERTIES SOVERSION ${PHYSFS_SOVERSION})
    set_target_properties(physfs PROPERTIES EXPORT_NAME PhysFS)
    if(WINRT)
		set_target_properties(physfs PROPERTIES VS_WINRT_COMPONENT True)
    endif()
    if(OS2) # OS/2 does not support a DLL name longer than 8 characters.
        set_target_properties(physfs PROPERTIES OUTPUT_NAME "physfs")
    endif()
    target_include_directories(physfs PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>")
    target_link_libraries(physfs PRIVATE ${OPTIONAL_LIBRARY_LIBS} ${OTHER_LDFLAGS})
    set(PHYSFS_LIB_TARGET physfs)
    list(APPEND PHYSFS_INSTALL_TARGETS "physfs")
endif()

if(NOT PHYSFS_BUILD_SHARED AND NOT PHYSFS_BUILD_STATIC)
    message(FATAL "Both shared and static libraries are disabled!")
endif()

# CMake FAQ says I need this...
if(PHYSFS_BUILD_SHARED AND PHYSFS_BUILD_STATIC AND NOT WIN32)
    set_target_properties(physfs PROPERTIES CLEAN_DIRECT_OUTPUT 1)
    set_target_properties(physfs-static PROPERTIES CLEAN_DIRECT_OUTPUT 1)
endif()

option(PHYSFS_BUILD_TEST "Build stdio test program." FALSE)
mark_as_advanced(PHYSFS_BUILD_TEST)
if(PHYSFS_BUILD_TEST)
    find_path(READLINE_H readline/readline.h)
    find_path(HISTORY_H readline/history.h)
    if(READLINE_H AND HISTORY_H)
        find_library(CURSES_LIBRARY NAMES curses ncurses)
        if(CURSES_LIBRARY)
            set(CMAKE_REQUIRED_LIBRARIES ${CURSES_LIBRARY})
            find_library(READLINE_LIBRARY readline)
            if(READLINE_LIBRARY)
                set(HAVE_SYSTEM_READLINE TRUE)
                list(APPEND TEST_PHYSFS_LIBS ${READLINE_LIBRARY} ${CURSES_LIBRARY})
                include_directories(SYSTEM ${READLINE_H} ${HISTORY_H})
                add_definitions(-DPHYSFS_HAVE_READLINE=1)
            endif()
        endif()
    endif()
    add_executable(test_physfs test/test_physfs.c)
    target_link_libraries(test_physfs PRIVATE ${PHYSFS_LIB_TARGET} ${TEST_PHYSFS_LIBS} ${OTHER_LDFLAGS})
    list(APPEND PHYSFS_INSTALL_TARGETS test_physfs)
endif()

option(PHYSFS_DISABLE_INSTALL "Disable installing PhysFS" OFF)
if(NOT PHYSFS_DISABLE_INSTALL)

    install(TARGETS ${PHYSFS_INSTALL_TARGETS} EXPORT PhysFSExport
            RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
            LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
            ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
            INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
    install(FILES src/physfs.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

    install(EXPORT PhysFSExport
            DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/PhysFS"
            FILE PhysFSConfig.cmake
            NAMESPACE PhysFS::
    )

    if(NOT MSVC)
        configure_file(
            "extras/physfs.pc.in"
            "extras/physfs.pc"
            @ONLY
        )

        install(
            FILES "${CMAKE_CURRENT_BINARY_DIR}/extras/physfs.pc"
            DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig"
        )
    endif()
endif()

option(PHYSFS_BUILD_DOCS "Build doxygen based documentation" FALSE)
if(PHYSFS_BUILD_DOCS)
    find_package(Doxygen)
    if(DOXYGEN_FOUND)
        set(PHYSFS_OUTPUT_DOXYFILE "${CMAKE_CURRENT_BINARY_DIR}/Doxyfile")
        configure_file(
            "${CMAKE_CURRENT_SOURCE_DIR}/docs/Doxyfile"
            "${PHYSFS_OUTPUT_DOXYFILE}"
            COPYONLY
        )
        file(APPEND "${PHYSFS_OUTPUT_DOXYFILE}" "\n\n# Below auto-generated by cmake...\n\n")
        file(APPEND "${PHYSFS_OUTPUT_DOXYFILE}" "PROJECT_NUMBER = \"${PHYSFS_VERSION}\"\n")
        file(APPEND "${PHYSFS_OUTPUT_DOXYFILE}" "OUTPUT_DIRECTORY = \"${CMAKE_CURRENT_BINARY_DIR}/docs\"\n")
        file(APPEND "${PHYSFS_OUTPUT_DOXYFILE}" "\n# End auto-generated section.\n\n")

        set(PHYSFS_TARGETNAME_DOCS "docs" CACHE STRING "Name of 'docs' build target")

        add_custom_target(
            ${PHYSFS_TARGETNAME_DOCS}
            ${DOXYGEN_EXECUTABLE} "${PHYSFS_OUTPUT_DOXYFILE}"
            WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
            COMMENT "Building documentation in 'docs' directory..."
        )

    else()
        message(STATUS "Doxygen not found. You won't be able to build documentation.")
    endif()
endif()

if(UNIX)
    set(PHYSFS_TARBALL "${CMAKE_CURRENT_SOURCE_DIR}/../physfs-${PHYSFS_VERSION}.tar.gz")

    set(PHYSFS_TARGETNAME_DIST "dist" CACHE STRING "Name of 'dist' build target")
    add_custom_target(
        ${PHYSFS_TARGETNAME_DIST}
        git archive --prefix="physfs-${PHYSFS_VERSION}/" --output="${PHYSFS_TARBALL}" HEAD
        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
        COMMENT "Building source tarball '${PHYSFS_TARBALL}'..."
    )

    set(PHYSFS_TARGETNAME_UNINSTALL "uninstall" CACHE STRING "Name of 'uninstall' build target")
    add_custom_target(
        ${PHYSFS_TARGETNAME_UNINSTALL}
        "${CMAKE_CURRENT_SOURCE_DIR}/extras/uninstall.sh"
        WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
        COMMENT "Uninstall the project..."
    )
endif()


macro(message_bool_option _NAME _VALUE)
    if(${_VALUE})
        message(STATUS "  ${_NAME}: enabled")
    else()
        message(STATUS "  ${_NAME}: disabled")
    endif()
endmacro()

message(STATUS "PhysicsFS will build with the following options:")
message_bool_option("ZIP support" PHYSFS_ARCHIVE_ZIP)
message_bool_option("7zip support" PHYSFS_ARCHIVE_7Z)
message_bool_option("GRP support" PHYSFS_ARCHIVE_GRP)
message_bool_option("WAD support" PHYSFS_ARCHIVE_WAD)
message_bool_option("HOG support" PHYSFS_ARCHIVE_HOG)
message_bool_option("MVL support" PHYSFS_ARCHIVE_MVL)
message_bool_option("QPAK support" PHYSFS_ARCHIVE_QPAK)
message_bool_option("SLB support" PHYSFS_ARCHIVE_SLB)
message_bool_option("VDF support" PHYSFS_ARCHIVE_VDF)
message_bool_option("ISO9660 support" PHYSFS_ARCHIVE_ISO9660)
message_bool_option("Build static library" PHYSFS_BUILD_STATIC)
message_bool_option("Build shared library" PHYSFS_BUILD_SHARED)
message_bool_option("Build stdio test program" PHYSFS_BUILD_TEST)
message_bool_option("Build Doxygen documentation" PHYSFS_BUILD_DOCS)
if(PHYSFS_BUILD_TEST)
    message_bool_option("  Use readline in test program" HAVE_SYSTEM_READLINE)
endif()

# end of CMakeLists.txt ...