PROJECT(StringFileTest)
INCLUDE_DIRECTORIES(${StringFileTest_BINARY_DIR})

# Read file test
FILE(READ "${CMAKE_CURRENT_SOURCE_DIR}/InputFile.h.in" infile)

# FILE(STRINGS) test
FILE(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/InputFile.h.in" infile_strings
  LIMIT_COUNT 1 LIMIT_INPUT 1024 LIMIT_OUTPUT 1024
  LENGTH_MINIMUM 10 LENGTH_MAXIMUM 23 REGEX include NEWLINE_CONSUME)
SET(infile_strings_goal "#include \"includefile\"\n")
IF("${infile_strings}" STREQUAL "${infile_strings_goal}")
  MESSAGE("FILE(STRINGS) correctly read [${infile_strings}]")
ELSE("${infile_strings}" STREQUAL "${infile_strings_goal}")
  MESSAGE(SEND_ERROR
    "FILE(STRINGS) incorrectly read [${infile_strings}]")
ENDIF("${infile_strings}" STREQUAL "${infile_strings_goal}")

# String test
STRING(REGEX MATCH "[cC][mM][aA][kK][eE]" rmvar "CMake is great")
STRING(REGEX MATCHALL "[cC][mM][aA][kK][eE]" rmallvar "CMake is better than cmake or CMake")
STRING(REGEX REPLACE "[Aa][uU][tT][oO]([cC][oO][nN][fF]|[mM][aA][kK][eE])"
  "CMake" rrepvar "People should use Autoconf and Automake")
STRING(COMPARE EQUAL "CMake" "Autoconf" nceqvar)
STRING(COMPARE EQUAL "CMake" "CMake" ceqvar)
STRING(COMPARE NOTEQUAL "CMake" "Autoconf" cneqvar)
STRING(COMPARE NOTEQUAL "CMake" "CMake" ncneqvar)
STRING(COMPARE LESS "before" "after" nclvar)
STRING(COMPARE LESS "max" "min" clvar)
STRING(COMPARE GREATER "before" "after" cgvar)
STRING(COMPARE GREATER "max" "min" ncgvar)
STRING(ASCII 67 109 97 107 101 savar)
STRING(TOUPPER "CMake" tuvar)
STRING(TOLOWER "CMake" tlvar)
STRING(REPLACE "Autoconf" "CMake" repvar "People should use Autoconf")

STRING(STRIP "
  ST1
  " ST1)
STRING(STRIP "ST2 " ST2)
STRING(STRIP " 	ST3" ST3)

FOREACH(var ST1 ST2 ST3)
  IF("${var}" STREQUAL "${${var}}")
    MESSAGE("[${var}] == [${${var}}]")
  ELSE("${var}" STREQUAL "${${var}}")
    MESSAGE(SEND_ERROR "Problem with the STRIP command for ${var}: [${${var}}]")
  ENDIF("${var}" STREQUAL "${${var}}")
ENDFOREACH(var)

STRING(SUBSTRING "People should use Autoconf" 7 10 substringres)
SET(substringres "Everybody ${substringres} CMake")

STRING(LENGTH ${substringres} lengthres)

FILE(RELATIVE_PATH relpath "/usr/local/bin" "/usr/X11R6/bin/xnest")

# Escaping test
SET(var "\\ \" \  \t \n \r \# \( \) \0")
MESSAGE("Output: [${var}]")
SET(var \\ \" \  \t \n \r \# \( \) \0)
MESSAGE("Output: [${var}]")

# Make-style unquoted argument test
SET(var $(VAR1)$(VAR2)/$(VAR3))
MESSAGE("Output: [${var}]")
STRING(COMPARE EQUAL "${var}" "$(VAR1)$(VAR2)/$(VAR3)" result)
IF(NOT result)
  MESSAGE(SEND_ERROR "Unquoted $(VAR) syntax is broken.")
ENDIF(NOT result)

# Make directories test
FILE(MAKE_DIRECTORY 
  "${CMAKE_CURRENT_BINARY_DIR}/Includes" 
  "${CMAKE_CURRENT_BINARY_DIR}/Directory1"
  "${CMAKE_CURRENT_BINARY_DIR}/Directory2"
  )

# Write results to the file (test write file)
SET(file "${CMAKE_CURRENT_BINARY_DIR}/Includes/Values.h")
FILE(WRITE "${file}" "/* this file is generated */\n")
FOREACH(var
    rmvar
    rmallvar
    rrepvar
    repvar
    relpath
    substringres
    lengthres
    nceqvar
    ceqvar
    cneqvar
    ncneqvar
    nclvar
    clvar
    cgvar
    ncgvar
    savar
    tuvar
    tlvar)
  FILE(APPEND "${file}" "#define ${var} \"${${var}}\"\n")
ENDFOREACH(var)

# Verify that the file was created recently.
IF(NOT "${file}" IS_NEWER_THAN "${CMAKE_CURRENT_SOURCE_DIR}/InputFile.h.in")
  MESSAGE(FATAL_ERROR "IF(FILE_IS_NEWER) does not seem to work.")
ENDIF(NOT "${file}" IS_NEWER_THAN "${CMAKE_CURRENT_SOURCE_DIR}/InputFile.h.in")

# Test configuration of the string
SET(TEST_DEFINED 123)
SET(TEST_NOT_DEFINED)
STRING(CONFIGURE "${infile}" infile+-/out @ONLY)
SET(infile "${infile+-/out}")

# Write include file to a file
STRING(REGEX REPLACE "includefile" "${file}" outfile "${infile}")
FILE(WRITE "${CMAKE_CURRENT_BINARY_DIR}/OutputFile.h" "${outfile}")

# Test file glob
FILE(GLOB_RECURSE src_files "${CMAKE_CURRENT_SOURCE_DIR}/*")
MESSAGE("Files in ${CMAKE_CURRENT_SOURCE_DIR} are ${src_files}")
SET(expr "${CMAKE_CURRENT_SOURCE_DIR}/[sS][!a-su-zA-Z0-9][^a-qs-zA-Z0-9]ing?ile*.cxx")
MESSAGE("Glob expression is [${expr}].")
FILE(GLOB src_files "${expr}")
MESSAGE("Globbed files [${src_files}].")
ADD_EXECUTABLE(StringFileTest ${src_files})

SET(expr "${CMAKE_CURRENT_SOURCE_DIR}/../*.cxx")
FILE(GLOB_RECURSE rel_src_files RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}/.." "${expr}")
MESSAGE("Globbed files [${rel_src_files}].")

# Test FOREACH range
MESSAGE("Cheack if FOREACH with RANGE works")
MACRO(TEST_RANGE ARGS CHECK)
  SET(r)
  FOREACH(a RANGE ${ARGS})
    SET(r ${r} ${a})
  ENDFOREACH(a)
  MESSAGE("FOREACH with RANGE ${ARGS} produces ${r}")
  IF("x${r}x" MATCHES "^x${CHECK}x$")
  ELSE("x${r}x" MATCHES "^x${CHECK}x$")
    MESSAGE(SEND_ERROR "The range resulted in: ${r} should be ${CHECK}")
  ENDIF("x${r}x" MATCHES "^x${CHECK}x$")
ENDMACRO(TEST_RANGE)
TEST_RANGE("5" "0;1;2;3;4;5")
TEST_RANGE("3;5" "3;4;5")
TEST_RANGE("5;3" "5;4;3")
TEST_RANGE("3;10;2" "3;5;7;9")
TEST_RANGE("10;0;-3" "10;7;4;1")