using data/mappings for processing

cmake/ParseHeader.cmake

@@ -0,0 +1,64 @@
+# Simple CMake utility to read variables from MK files
+# - Gets contents from given file (name or path)
+# - Parses the assignment statements
+# - Makes the same assignments in the PARENT_SCOPE
+
+if(POLICY CMP0007)
+    cmake_policy(SET CMP0007 NEW)
+endif()
+
+function(ParseHeader HeaderFile Prefix)
+    _ParseHeader(${HeaderFile} ${Prefix})
+endfunction()
+
+macro(_ParseHeader HeaderFile Prefix)
+    message(CHECK_START "Parsing Header")
+    list(APPEND CMAKE_MESSAGE_INDENT "  ")
+    message(STATUS "Reading \"${HeaderFile}\"")
+
+    file(READ "${HeaderFile}" FileContents)
+    string(REGEX REPLACE "/\\*.*\\*/" "" FileContents ${FileContents})
+    # replace the \ newlines with spaces
+    string(REGEX REPLACE "\\\\\r?\n *" " " FileContents ${FileContents})
+    # turn each line into an item in a list
+    string(REGEX REPLACE "\r?\n" ";" FileLines ${FileContents})
+    list(REMOVE_ITEM FileLines "")
+
+    foreach(line ${FileLines})
+        # remove comments from the ends of each line
+        string(REGEX REPLACE "//.*" "" line ${line})
+
+        # remove now-empty lines
+        if("${line}" STREQUAL "")
+            continue()
+        endif()
+
+        # try to process includes, if the file exists
+        if(line MATCHES "^#include \"(.+)\"")
+            set(INCLUDED_HEADER ${CMAKE_MATCH_1})
+            if(EXISTS ${INCLUDED_HEADER})
+                _ParseHeader("${INCLUDED_HEADER}" ${Prefix})
+            else()
+                message(STATUS "Could not read ${INCLUDED_HEADER}")
+            endif()
+            continue()
+        endif()
+        
+        # array
+        if(line MATCHES "#define ([A-Za-z0-9_]+) {(.*)}")
+            set(VARIABLE_NAME ${CMAKE_MATCH_1})
+            set(VARIABLE_VALUE ${CMAKE_MATCH_2})
+            set(${Prefix}${VARIABLE_NAME} ${VARIABLE_VALUE})
+        endif()
+
+        # regular variable
+        if(line MATCHES "#define ([A-Za-z0-9_]+) (.*)")
+            set(VARIABLE_NAME ${CMAKE_MATCH_1})
+            set(VARIABLE_VALUE ${CMAKE_MATCH_2})
+            set(${Prefix}${VARIABLE_NAME} ${VARIABLE_VALUE})
+        endif()
+    endforeach()
+
+    list(POP_BACK CMAKE_MESSAGE_INDENT)
+    message(CHECK_PASS "Complete")
+endmacro()