FindHttpParser.cmake

find_path(HTTP_PARSER_INCLUDE_DIR NAMES http_parser.h)
mark_as_advanced(HTTP_PARSER_INCLUDE_DIR)

find_library(HTTP_PARSER_LIBRARY NAMES http_parser libhttp_parser)
mark_as_advanced(HTTP_PARSER_LIBRARY)

if(DEFINED HTTP_PARSER_INCLUDE_DIR)
  file(STRINGS "${HTTP_PARSER_INCLUDE_DIR}/http_parser.h" _HTTP_PARSER_H REGEX
    "#define HTTP_PARSER_VERSION_(MAJOR|MINOR|PATCH) [0-9]+")
  foreach(c MAJOR MINOR PATCH)
    if(_HTTP_PARSER_H MATCHES "#define HTTP_PARSER_VERSION_${c} ([0-9]+)")
      set(HTTP_PARSER_VERSION_${c} "${CMAKE_MATCH_1}")
    endif()
  endforeach()
  unset(_HTTP_PARSER_H)
  set(HTTP_PARSER_VERSION "${HTTP_PARSER_VERSION_MAJOR}.${HTTP_PARSER_VERSION_MINOR}.${HTTP_PARSER_VERSION_PATCH}")
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(http_parser
  REQUIRED_VARS HTTP_PARSER_INCLUDE_DIR HTTP_PARSER_LIBRARY
  VERSION_VAR HTTP_PARSER_VERSION)

if(HTTP_PARSER_FOUND)
  set(HTTP_PARSER_INCLUDE_DIRS "${HTTP_PARSER_INCLUDE_DIR}")
  set(HTTP_PARSER_LIBRARIES "${HTTP_PARSER_LIBRARY}")
  if(NOT TARGET http_parser::http_parser)
    add_library(http_parser::http_parser UNKNOWN IMPORTED)
    set_target_properties(http_parser::http_parser PROPERTIES
      IMPORTED_LOCATION "${HTTP_PARSER_LIBRARIES}"
      INTERFACE_INCLUDE_DIRECTORIES "${HTTP_PARSER_INCLUDE_DIRS}")
  endif()
endif()