# This procedure executes one line of a test case's execution script.
proc execOneLine { test PRS outcome lineno line } {
  set status 0
  set resultmsg ""
  set retval [ catch { eval exec -keepnewline -- $line } errmsg ]
  if { $retval != 0 } {
    set code [lindex $::errorCode 0]
    set lineno [expr $lineno + 1]
    if { $PRS != ""} {
      set PRS " for $PRS" 
    }
    set errmsg " at line $lineno\nwhile running: $line\n$errmsg"
    switch "$code" {
      CHILDSTATUS {
        set status [lindex $::errorCode 2]
        if { $status != 0 } {
          set resultmsg "$test$PRS\nFailed with exit($status)$errmsg"
        }
      }
      CHILDKILLED {
        set signal [lindex $::errorCode 2]
        set resultmsg "$test$PRS\nFailed with signal($signal)$errmsg"
      }
      CHILDSUSP {
        set signal [lindex $::errorCode 2]
        set resultmsg "$test$PRS\nFailed with suspend($signal)$errmsg"
      }
      POSIX {
        set posixNum [lindex $::errorCode 1]
        set posixMsg [lindex $::errorCode 2]
        set resultmsg "$test$PRS\nFailed with posix($posixNum,$posixMsg)$errmsg"
      }
      NONE {
      }
      default {
      }
    }
  } 
  return $resultmsg
}

# This procedure performs variable substitutions on the RUN: lines of a test
# cases.
proc substitute { line test tmpFile } {
  global srcroot objroot srcdir objdir subdir target_triplet
  global llvmgcc llvmgxx llvmgcc_version 
  set path [file join $srcdir $subdir]

  # Substitute all Tcl variables.
  set new_line [subst $line ]

  #replace %llvmgcc with actual path to llvmgcc
  regsub -all {%llvmgcc} $new_line "$llvmgcc -emit-llvm" new_line
  #replace %llvmgxx with actual path to llvmg++
  regsub -all {%llvmgxx} $new_line "$llvmgxx -emit-llvm" new_line
  #replace %klee with klee binary
  regsub -all {%klee} $new_line "klee" new_line
  #replace %kleaver with kleaver binary
  regsub -all {%kleaver} $new_line "kleaver" new_line
  #replace %p with path to source, 
  regsub -all {%p} $new_line [file join $srcdir $subdir] new_line
  #replace %s with filename
  regsub -all {%s} $new_line $test new_line
  #replace %t with temp filenames
  regsub -all {%t} $new_line $tmpFile new_line
  #replace %% with %
  regsub -all {%%} $new_line % new_line
  return $new_line
}

# This procedure runs the set of tests for the test_source_files array.
proc RunLLVMTests { test_source_files } {
  global srcroot objroot srcdir objdir subdir TEST_FEATURE_LIST target_triplet
  set timeout 60

  set path [file join $objdir $subdir]
  
  #Make Output Directory if it does not exist already
  if { [file exists path] } {
    cd $path
  } else {
    file mkdir $path
    cd $path
  }
  
  file mkdir Output
  cd Output

  foreach test $test_source_files {
    #Should figure out best way to set the timeout
    #set timeout 40
    
    set filename [file tail $test]
    set outcome PASS
    set tmpFile "$filename.tmp"

    #set hasRunline bool to check if testcase has a runline
    set numLines 0

    # Open the test file and start reading lines
    set testFileId [ open $test r]
    set runline ""
    set PRNUMS ""
    foreach line [split [read $testFileId] \n] {

      # if its the END. line then stop parsing (optimization for big files)
      if {[regexp {END.[ *]$} $line match endofscript]} {
        break

      # if the line is continued, concatenate and continue the loop
      } elseif {[regexp {RUN: *(.+)(\\)$} $line match oneline suffix]} {
        set runline "$runline$oneline "

      # if its a terminating RUN: line then do substitution on the whole line
      # and then save the line.
      } elseif {[regexp {RUN: *([^&]+)(&&)?} $line match oneline suffix]} {
        set runline "$runline$oneline"
        set runline [ substitute $runline $test $tmpFile ]
        set lines($numLines) $runline
        set numLines [expr $numLines + 1]
        set runline ""

      # if its an PR line, save the problem report number
      } elseif {[regexp {PR([0-9]+)} $line match prnum]} {
        if {$PRNUMS == ""} {
          set PRNUMS "PR$prnum"
        } else {
          set PRNUMS "$PRNUMS,$prnum"
        }
      # if its an XFAIL line, see if we should be XFAILing or not.
      } elseif {[regexp {XFAIL:[ *](.+)} $line match features]} {
        set features

        foreach feature [split $features ,] {
          if { [regexp {\*} $feature match] } {
              set outcome XFAIL
          } elseif { [regexp $feature $target_triplet match] } {
              set outcome XFAIL
          } elseif { [regexp $feature $TEST_FEATURE_LIST match] } {
              set outcome XFAIL
          }
        }
      }
    }
    
    # Done reading the script
    close $testFileId
    
    
    if { $numLines == 0 } {
      fail "$test: \nDoes not have a RUN line\n"
    } else {
      set failed 0
      for { set i 0 } { $i < $numLines } { set i [ expr $i + 1 ] } {
        regsub ^.*RUN:(.*) $lines($i) \1 theLine
        set resultmsg [execOneLine $test $PRNUMS $outcome $i $theLine ]
        if { $resultmsg != "" } {
          if { $outcome == "XFAIL" } {
            xfail "$resultmsg"
          } else {
            fail "$resultmsg"
          }
          set failed 1
          break
        }
      }
      if { $failed } {
        continue
      } else {
        if { $PRNUMS != "" } {
          set PRNUMS " for $PRNUMS"
        }
        if { $outcome == "XFAIL" } {
          xpass "$test$PRNUMS"
        } else {
          pass "$test$PRNUMS"
        }
      }
    }
  }
}

# Check if klee was configured with POSIX runtime support.
proc klee_supports_posix_runtime { } {
    global ENABLE_POSIX_RUNTIME
    if { $ENABLE_POSIX_RUNTIME == "1" } {
        return 1
    }
    return 0
}

# Check if klee was configured with uclibc support.
proc klee_supports_uclibc { } {
    global ENABLE_UCLIBC
    if { $ENABLE_UCLIBC == "1" } {
        return 1
    }
    return 0
}