Convert h2inc to a cmake function

Author: am11

eng/native/functions.cmake

@@ -8,6 +8,71 @@ function(clr_unknown_arch)
     endif()
 endfunction()
 
+# C to MASM include file translator
+# This is replacement for the deprecated h2inc tool that used to be part of VS.
+function(h2inc filename output)
+    file(STRINGS ${filename} lines)
+    get_filename_component(path "${filename}" DIRECTORY)
+    file(RELATIVE_PATH relative_filename "${CLR_REPO_ROOT_DIR}" "${filename}")
+
+    file(APPEND "${output}" "// File start: ${relative_filename}\n")
+
+    # Use of NEWLINE_CONSUME is needed for lines with trailing backslash
+    file(STRINGS ${filename} contents NEWLINE_CONSUME)
+    string(REGEX REPLACE "\\\\\n" "\\\\\\\\ \n" contents "${contents}")
+    string(REGEX REPLACE "\n" ";" lines "${contents}")
+
+    foreach(line IN LISTS lines)
+        string(REGEX REPLACE "\\\\\\\\ " "\\\\" line "${line}")
+
+        if(line MATCHES "^ *# pragma")
+            # Ignore pragmas
+            continue()
+        endif()
+
+        if(line MATCHES "^ *# *include *\"(.*)\"")
+            # Expand includes.
+            h2inc("${path}/${CMAKE_MATCH_1}" "${output}")
+            continue()
+        endif()
+
+        if(line MATCHES "^ *#define +([0-9A-Za-z_()]+) *(.*)")
+            # Augment #defines with their MASM equivalent
+            set(name "${CMAKE_MATCH_1}")
+            set(value "${CMAKE_MATCH_2}")
+
+            # Note that we do not handle multiline constants
+
+            # Strip comments from value
+            string(REGEX REPLACE "//.*" "" value "${value}")
+            string(REGEX REPLACE "/\\*.*\\*/" "" value "${value}")
+
+            # Strip whitespaces from value
+            string(REPLACE " +$" "" value "${value}")
+
+            # ignore #defines with arguments
+            if(NOT "${name}" MATCHES "\\(")
+                set(HEX_NUMBER_PATTERN "0x([0-9A-Fa-f]+)")
+                set(DECIMAL_NUMBER_PATTERN "(-?[0-9]+)")
+
+                if("${value}" MATCHES "${HEX_NUMBER_PATTERN}")
+                    string(REGEX REPLACE "${HEX_NUMBER_PATTERN}" "0\\1h" value "${value}")    # Convert hex constants
+                    file(APPEND "${output}" "${name} EQU ${value}\n")
+                elseif("${value}" MATCHES "${DECIMAL_NUMBER_PATTERN}" AND (NOT "${value}" MATCHES "[G-Zg-z]+" OR "${value}" MATCHES "\\("))
+                    string(REGEX REPLACE "${DECIMAL_NUMBER_PATTERN}" "\\1t" value "${value}") # Convert dec constants
+                    file(APPEND "${output}" "${name} EQU ${value}\n")
+                else()
+                    file(APPEND "${output}" "${name} TEXTEQU <${value}>\n")
+                endif()
+            endif()
+        endif()
+
+        file(APPEND "${output}" "${line}\n")
+    endforeach()
+
+    file(APPEND "${output}" "// File end: ${relative_filename}\n")
+endfunction()
+
 # Build a list of compiler definitions by putting -D in front of each define.
 function(get_compile_definitions DefinitionName)
     # Get the current list of definitions

src/coreclr/vm/h2inc.pl

@@ -34,17 +34,14 @@ if (CLR_CMAKE_TARGET_WIN32)
     endif (CLR_CMAKE_HOST_ARCH_I386)
 
     # Convert AsmConstants.h into AsmConstants.inc
-    find_program(POWERSHELL powershell)
-    if (POWERSHELL STREQUAL "POWERSHELL-NOTFOUND")
-        message(FATAL_ERROR "POWERSHELL not found")
-    endif()
+    h2inc("${VM_DIR}/${ARCH_SOURCES_DIR}/asmconstants.h" "${CMAKE_CURRENT_BINARY_DIR}/AsmConstants.tmp")
 
     # Get the current list of definitions
     get_compile_definitions(DEFINITIONS)
+
     add_custom_command(
         OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/AsmConstants.inc"
         DEPENDS ${VM_DIR}/${ARCH_SOURCES_DIR}/asmconstants.h
-        COMMAND ${POWERSHELL} -NoProfile -ExecutionPolicy Bypass -NonInteractive \"& \"\"${VM_DIR}/h2inc.ps1\"\"\" \"\"\"${VM_DIR}/${ARCH_SOURCES_DIR}/asmconstants.h\"\"\" >"${CMAKE_CURRENT_BINARY_DIR}/AsmConstants.tmp"
         COMMAND ${CMAKE_CXX_COMPILER} ${DEFINITIONS} /EP "${CMAKE_CURRENT_BINARY_DIR}/AsmConstants.tmp" >"${CMAKE_CURRENT_BINARY_DIR}/AsmConstants.inc"
     )