build: use cmake to build libvterm on all platform (#21986)

Also remove Libvterm-tbl2inc_c.cmake as it's not required. It's used to
generate files that are already provided by the Libvterm project by
default. It's also not really something we need to concern ourselves
with as it's more of an authoring tool for the Libvterm creator as
mentioned in
https://github.com/neovim/neovim/pull/21986#issuecomment-1403733054.

3 files changed, 5 insertions, 247 deletions

diff --git a/cmake.deps/cmake/BuildLibvterm.cmake b/cmake.deps/cmake/BuildLibvterm.cmake
index 1578d56fba..b75987eb24 100644
--- a/cmake.deps/cmake/BuildLibvterm.cmake
+++ b/cmake.deps/cmake/BuildLibvterm.cmake
@@ -1,27 +1,3 @@
-if(WIN32)
-  set(LIBVTERM_CONFIGURE_COMMAND ${CMAKE_COMMAND} -E copy
-      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/LibvtermCMakeLists.txt
-      ${DEPS_BUILD_DIR}/src/libvterm/CMakeLists.txt
-    COMMAND ${CMAKE_COMMAND} -E copy
-      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/Libvterm-tbl2inc_c.cmake
-      ${DEPS_BUILD_DIR}/src/libvterm/tbl2inc_c.cmake
-    COMMAND ${CMAKE_COMMAND} ${DEPS_BUILD_DIR}/src/libvterm
-      -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
-      -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
-      -DCMAKE_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
-      -DCMAKE_GENERATOR=${CMAKE_GENERATOR}
-      -DCMAKE_POSITION_INDEPENDENT_CODE=ON)
-  set(LIBVTERM_BUILD_COMMAND ${CMAKE_COMMAND} --build . --config $<CONFIG>)
-  set(LIBVTERM_INSTALL_COMMAND ${CMAKE_COMMAND} --build . --target install --config $<CONFIG>)
-else()
-  set(LIBVTERM_INSTALL_COMMAND ${MAKE_PRG} CC=${DEPS_C_COMPILER}
-                                           PREFIX=${DEPS_INSTALL_DIR}
-                                           CFLAGS=-fPIC
-                                           LDFLAGS+=-static
-                                           ${DEFAULT_MAKE_CFLAGS}
-                                           install)
-endif()
-
 if(USE_EXISTING_SRC_DIR)
   unset(LIBVTERM_URL)
 endif()
@@ -30,10 +6,9 @@ ExternalProject_Add(libvterm
   URL_HASH SHA256=${LIBVTERM_SHA256}
   DOWNLOAD_NO_PROGRESS TRUE
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/libvterm
-  BUILD_IN_SOURCE 1
-  CONFIGURE_COMMAND "${LIBVTERM_CONFIGURE_COMMAND}"
-  BUILD_COMMAND "${LIBVTERM_BUILD_COMMAND}"
-  INSTALL_COMMAND "${LIBVTERM_INSTALL_COMMAND}"
+  PATCH_COMMAND ${CMAKE_COMMAND} -E copy
+    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/LibvtermCMakeLists.txt
+    ${DEPS_BUILD_DIR}/src/libvterm/CMakeLists.txt
   CMAKE_ARGS ${DEPS_CMAKE_ARGS}
   CMAKE_CACHE_ARGS ${DEPS_CMAKE_CACHE_ARGS})
 
diff --git a/cmake.deps/cmake/Libvterm-tbl2inc_c.cmake b/cmake.deps/cmake/Libvterm-tbl2inc_c.cmake
deleted file mode 100644
index 32d973680f..0000000000
--- a/cmake.deps/cmake/Libvterm-tbl2inc_c.cmake
+++ /dev/null
@@ -1,163 +0,0 @@
-cmake_minimum_required(VERSION 3.10)
-
-set(HEX_ALPHABET "0123456789abcdef")
-
-function(ConvertToHex dec hex)
-  while(dec GREATER 0)
-    math(EXPR _val "${dec} % 16")
-    math(EXPR dec "${dec} / 16")
-    string(SUBSTRING ${HEX_ALPHABET} ${_val} 1 _val)
-    set(_res "${_val}${_res}")
-  endwhile()
-  # Pad the result with the number of zeros
-  # specified by the optional third argument
-  if(${ARGC} EQUAL 3)
-    set(padding ${ARGV2})
-    string(LENGTH ${_res} _resLen)
-    if(_resLen LESS ${padding})
-      math(EXPR _neededPadding "${padding} - ${_resLen}")
-      foreach(i RANGE 1 ${_neededPadding})
-        set(_res "0${_res}")
-      endforeach()
-    endif()
-  endif()
-  set(${hex} "0x${_res}" PARENT_SCOPE)
-endfunction()
-
-function(ConvertFromHex hex dec)
-  string(TOLOWER ${hex} hex)
-  string(LENGTH "${hex}" _strlen)
-  set(_res 0)
-  while(_strlen GREATER 0)
-    math(EXPR _res "${_res} * 16")
-    string(SUBSTRING "${hex}" 0 1 NIBBLE)
-    string(SUBSTRING "${hex}" 1 -1 hex)
-    string(FIND ${HEX_ALPHABET} ${NIBBLE} value)
-    if(value EQUAL -1)
-      message(FATAL_ERROR "Invalid hex character '${NIBBLE}'")
-    endif()
-    math(EXPR _res "${_res} + ${value}")
-    string(LENGTH "${hex}" _strlen)
-  endwhile()
-  set(${dec} ${_res} PARENT_SCOPE)
-endfunction()
-
-# Based on http://www.json.org/JSON_checker/utf8_decode.c
-function(DecodeUtf8 hexBytes codePoint)
-  string(SUBSTRING ${hexBytes} 0 2 hexByte1)
-  ConvertFromHex(${hexByte1} byte1)
-  # Zero continuations (0 to 127)
-  math(EXPR out "${byte1} & 128")
-  if(out EQUAL 0)
-    set(${codePoint} ${byte1} PARENT_SCOPE)
-    return()
-  endif()
-  # One continuation (128 to 2047)
-  math(EXPR out "${byte1} & 224")
-  if(out EQUAL 192)
-    string(SUBSTRING ${hexBytes} 2 2 hexByte2)
-    ConvertFromHex(${hexByte2} byte2)
-    math(EXPR result "((${byte1} & 31) << 6) | ${byte2}")
-    if(result GREATER 127)
-      set(${codePoint} ${result} PARENT_SCOPE)
-      return()
-    endif()
-  else()
-    # Two continuations (2048 to 55295 and 57344 to 65535)
-    math(EXPR result "${byte1} & 240")
-    if(result EQUAL 224)
-      string(SUBSTRING ${hexBytes} 2 2 hexByte2)
-      string(SUBSTRING ${hexBytes} 4 2 hexByte3)
-      ConvertFromHex(${hexByte2} byte2)
-      ConvertFromHex(${hexByte3} byte3)
-      math(EXPR result "${byte2} | ${byte3}")
-      if(result GREATER -1)
-        math(EXPR result "((${byte1} & 15) << 12) | (${byte2} << 6) | ${byte3}")
-        if((result GREATER 2047) AND (result LESS 55296 OR result GREATER 57343))
-          set(${codePoint} ${result} PARENT_SCOPE)
-          return()
-        endif()
-      endif()
-    else()
-      # Three continuations (65536 to 1114111)
-      math(EXPR result "${byte1} & 248")
-      if(result EQUAL 224)
-        string(SUBSTRING ${hexBytes} 2 2 hexByte2)
-        string(SUBSTRING ${hexBytes} 4 2 hexByte3)
-        string(SUBSTRING ${hexBytes} 6 2 hexByte4)
-        ConvertFromHex(${hexByte2} byte2)
-        ConvertFromHex(${hexByte3} byte3)
-        ConvertFromHex(${hexByte4} byte4)
-        math(EXPR result "${byte2} | ${byte3} | ${byte4}")
-        if(result GREATER -1)
-          math(EXPR result "((c & 7) << 18) | (c1 << 12) | (c2 << 6) | c3")
-          if((result GREATER 65535) AND (result LESS 1114112))
-            set(${codePoint} ${result} PARENT_SCOPE)
-            return()
-          endif()
-        endif()
-      endif()
-    endif()
-  endif()
-  message(FATAL_ERROR "Invalid UTF-8 encoding")
-endfunction()
-
-set(inputFile ${CMAKE_ARGV3})
-set(outputFile ${CMAKE_ARGV4})
-# Get the file contents in text and hex-encoded format because
-# CMake doesn't provide functions for converting between the two
-file(READ "${inputFile}" contents)
-file(READ "${inputFile}" hexContents HEX)
-
-# Convert the text contents into a list of lines by escaping
-# the list separator ';' and then replacing new line characters
-# with the list separator
-string(REGEX REPLACE ";" "\\\\;" contents ${contents})
-string(REGEX REPLACE "\n" ";" contents ${contents})
-
-get_filename_component(encname ${inputFile} NAME_WE)
-set(output
-  "static const struct StaticTableEncoding encoding_${encname} = {\n"
-  "  { .decode = &decode_table },\n"
-  "  {")
-set(hexIndex 0)
-foreach(line ${contents})
-  string(LENGTH ${line} lineLength)
-  # Convert "A" to 0x41
-  string(FIND ${line} "\"" beginQuote)
-  if(NOT ${beginQuote} EQUAL -1)
-    string(FIND ${line} "\"" endQuote REVERSE)
-    if(${beginQuote} EQUAL ${endQuote})
-      message(FATAL_ERROR "Line contains only one quote")
-    endif()
-    math(EXPR beginHexQuote "${hexIndex} + (${beginQuote} + 1)*2")
-    math(EXPR endHexQuote "${hexIndex} + (${endQuote} + 1)*2")
-    math(EXPR quoteLen "${endHexQuote} - ${beginHexQuote} - 1")
-    string(SUBSTRING ${hexContents} ${beginHexQuote} ${quoteLen} hexQuote)
-    DecodeUtf8(${hexQuote} codePoint)
-    ConvertToHex(${codePoint} hexCodePoint 4)
-    STRING(REGEX REPLACE "\"(.+)\"" ${hexCodePoint} line ${line})
-  endif()
-  # Strip comment
-  string(REGEX REPLACE "[ \t\n]*#.*" "" line ${line})
-  # Convert 3/1 to [0x31]
-  string(REGEX REPLACE "^([0-9]+)/([0-9]+).*" "\\1;\\2" numbers ${line})
-  list(GET numbers 0 upperBits)
-  list(GET numbers 1 lowerBits)
-  math(EXPR res "${upperBits}*16 + ${lowerBits}")
-  ConvertToHex(${res} hex 2)
-  string(REGEX REPLACE "^([0-9]+)/([0-9]+)" "[${hex}]" line ${line})
-  # Convert U+0041 to 0x0041
-  string(REPLACE "U+" "0x" line ${line})
-  # Indent and append a comma
-  set(line "    ${line},")
-  set(output "${output}\n${line}")
-  # Increment the index by the number of characters in the line,
-  # plus one for the new line character then multiple by two for the hex digit index
-  math(EXPR hexIndex "${hexIndex} + 2*(${lineLength} + 1)")
-endforeach()
-set(output "${output}\n"
-  "  }\n"
-  "}\;\n")
-
-file(WRITE ${outputFile} ${output})
diff --git a/cmake.deps/cmake/LibvtermCMakeLists.txt b/cmake.deps/cmake/LibvtermCMakeLists.txt
index 079ad28ba0..777ce6c54c 100644
--- a/cmake.deps/cmake/LibvtermCMakeLists.txt
+++ b/cmake.deps/cmake/LibvtermCMakeLists.txt
@@ -2,43 +2,18 @@ cmake_minimum_required(VERSION 3.10)
 project(libvterm LANGUAGES C)
 
 include(GNUInstallDirs)
-find_package(Perl)
 
 if(MSVC)
-  add_compile_options(/W3)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE)
 else()
-  add_compile_options(-Wall -std=c99)
+  add_compile_options(-std=c99)
 endif()
 
-# Generate includes from tables
-file(GLOB TBL_FILES ${CMAKE_SOURCE_DIR}/src/encoding/*.tbl)
-set(TBL_FILES_HEADERS)
-foreach(file ${TBL_FILES})
-  get_filename_component(basename ${file} NAME_WE)
-  set(tname encoding/${basename}.inc)
-  add_custom_command(OUTPUT
-    COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}/encoding/
-    COMMAND ${CMAKE_COMMAND} -P ${CMAKE_SOURCE_DIR}/tbl2inc_c.cmake ${file} ${CMAKE_BINARY_DIR}/${tname}
-    COMMENT "Generating ${tname}"
-    OUTPUT ${CMAKE_BINARY_DIR}/${tname}
-    )
-  list(APPEND TBL_FILES_HEADERS ${tname})
-  # Only used for verifying that the output of tbl2inc_c.cmake is correct
-  set(tname encoding-test/${basename}.inc)
-  add_custom_command(OUTPUT
-    COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}/encoding-test/
-    COMMAND ${PERL_EXECUTABLE} -CSD ${CMAKE_SOURCE_DIR}/tbl2inc_c.pl ${file} > ${CMAKE_BINARY_DIR}/${tname}
-    COMMENT "Generating ${tname}"
-    OUTPUT ${CMAKE_BINARY_DIR}/${tname}
-    )
-endforeach()
-
 include_directories(${CMAKE_SOURCE_DIR}/include)
 include_directories(${CMAKE_BINARY_DIR})
 
 file(GLOB VTERM_SOURCES ${CMAKE_SOURCE_DIR}/src/*.c)
-add_library(vterm ${VTERM_SOURCES} ${TBL_FILES_HEADERS})
+add_library(vterm ${VTERM_SOURCES})
 install(TARGETS vterm ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 
 install(FILES include/vterm.h include/vterm_keycodes.h
@@ -54,33 +29,4 @@ if(NOT WIN32)
   endforeach()
 endif()
 
-# Tests
-add_executable(harness EXCLUDE_FROM_ALL t/harness.c)
-target_link_libraries(harness vterm)
-set_target_properties(harness PROPERTIES
-  # run-test.pl expects to find the harness in t/.libs/
-  RUNTIME_OUTPUT_DIRECTORY t/.libs)
-
-if(Perl_FOUND)
-  file(GLOB TESTFILES ${CMAKE_SOURCE_DIR}/t/*.test)
-  add_custom_target(check)
-  foreach(testfile ${TESTFILES})
-    get_filename_component(target_name ${testfile} NAME_WE)
-    add_custom_target(${target_name}
-      COMMAND ${PERL_EXECUTABLE} ${CMAKE_SOURCE_DIR}/t/run-test.pl ${testfile}
-      COMMENT "**${target_name} **"
-      DEPENDS harness)
-    add_dependencies(check ${target_name})
-  endforeach()
-
-  foreach(header_path ${TBL_FILES_HEADERS})
-    get_filename_component(header_name ${header_path} NAME)
-    set(perl_header_path ${CMAKE_BINARY_DIR}/encoding-test/${header_name})
-    add_custom_target(test-${header_name}
-      COMMAND ${CMAKE_COMMAND} -E compare_files
-              ${header_path} ${perl_header_path}
-      DEPENDS ${header_path} ${perl_header_path})
-  endforeach()
-endif()
-
 # vim: set ft=cmake: