# tcc.tcl - library routines for the tcc wrapper (Mark Janssen)

namespace eval tcc4tcl {
   variable dir 
   variable libs
   variable includes
   variable count
   variable command_count
   variable commands

   set dir [file dirname [info script]]
   if {[info command ::tcc4tcl] == ""} {
      catch { load {} tcc4tcl }
   }
   if {[info command ::tcc4tcl] == ""} {
       load [file join $dir tcltcc[info sharedlibextension]] tcc4tcl
   }
   set libs $dir/lib
   set includes $dir/include
   set count 0
   set command_count 0
   array set commands {}
   proc new {} {
       variable dir
       variable count
       set handle tcc_[incr count]
       tcc4tcl $dir $handle
       return tcc_$count
   }
   proc tclcommand {handle name ccode} {
       variable commands
       variable command_count
       set cname _tcc_tcl_command_[incr command_count]
       set code    {#include "tcl.h"}

           set tclcommand [join [lrange [split $cmd ,] 1 end] {}]
           set handle [lindex [split $cmd ,] 0]
           $handle command $tclcommand $cname
        }
       return
   }
}
proc tcc4tcl::to_dll {code dll {libs {}}} {
    tcc4tcl $::tcc4tcl::dir dll tcc_1
    tcc_1 add_library tcl8.5 
    tcc_1 add_library_path .
    foreach lib $libs {tcc_1 add_library $lib}
    if {$::tcl_platform(platform) eq "windows"} {
        tcc_1 define DLL_EXPORT {__declspec(dllexport)} 
        set f [open $::tcc4tcl::dir/c/dllcrt1.c]
        tcc_1 compile [read $f]
        close $f
        set f [open $::tcc4tcl::dir/c/dllmain.c]
        tcc_1 compile [read $f]
        close $f
    } else {
        tcc_1 define DLL_EXPORT ""
    }
    tcc_1 compile $code
    tcc_1 output_file $dll
    rename tcc_1 {}
}
proc ::tcc4tcl::Log {args} {
  # puts $args
}
proc ::tcc4tcl::reset {} {
  variable tcc
  set tcc(code)   ""
  set tcc(cfiles) [list]
  set tcc(tk) 0
}
# Custom helpers
proc ::tcc4tcl::checkname {n} {expr {[regexp {^[a-zA-Z0-9_]+$} $n] > 0}}
proc ::tcc4tcl::cleanname {n} {regsub -all {[^a-zA-Z0-9_]+} $n _}

proc ::tcc4tcl::ccode {code} {
  variable tcc
  Log "INJECTING CCODE"
  append tcc(code) $code \n
}
proc ::tcc4tcl::cc {code} {
  variable tcc
  if {![info exists tcc(cc)]} {
      set tcc(cc) tcc1
      tcc4tcl $tcc4tcl::dir $tcc(cc)
      $tcc(cc) add_library tcl8.5
      $tcc(cc) add_include_path [file join $::tcc4tcl::dir include]
  }
  Log code:$code
  $tcc(cc) compile $code
}
#----------------------------------------------------------- New DLL API
proc ::tcc4tcl::dll {{name ""}} {
    variable count
    if {$name eq ""} {set name dll[incr count]}
    namespace eval ::tcc4tcl::dll::$name {
        variable code "#include <tcl.h>\n" ;# always needed
        variable cmds {}
    }
    proc ::$name {cmd args} "::tcc4tcl::dll::\$cmd $name \$args"
    return $name
}
namespace eval ::tcc4tcl::dll {}
proc ::tcc4tcl::dll::ccode {name argl} {
    append ${name}::code \n [lindex $argl 0]
    return
}
proc ::tcc4tcl::dll::cproc {name argl} {
    foreach {pname pargs rtype body} $argl break
    set code [::tcc4tcl::wrapCmd $pname $pargs $rtype cx_$pname $body]
    lappend ${name}::cmds $pname cx_$pname
    append ${name}::code \n $code
    return
}
proc ::tcc4tcl::dll::write {name argl} {
    set (-dir) .
    set (-code) "" ;# possible extra code to go into the _Init function
    set (-libs) ""
    set (-name) [string tolower $name]
    array set "" $argl
    append ${name}::code \n \
        [::tcc4tcl::wrapExport $(-name) [set ${name}::cmds] $(-code)]
    set outfile $(-dir)/$(-name)[info sharedlibextension]
    ::tcc4tcl::to_dll [set ${name}::code] $outfile $(-libs)
}
#---------------------------------------------------------------------
proc ::tcc4tcl::wrap {name adefs rtype {body "#"}} {
  set cname c_$name
  set wname tcl_$name
  array set types {}
  set names {}
  set cargs {}
  set cnames {}  
  # if first arg is "Tcl_Interp*", pass it without counting it as a cmd arg

  }
  if {$rtype != "ok"} {append cbody "  return TCL_OK;" \n}

  #puts ----code:\n$code
  #puts ----cbody:\n$cbody
  list $code $cbody
}
proc ::tcc4tcl::wrapCmd {tclname argl rtype cname body} {
    foreach {code cbody} [wrap $tclname $argl $rtype $body] break
    append code "\nstatic int $cname"
    append code {(ClientData cdata,Tcl_Interp *ip,
        int objc,Tcl_Obj* CONST objv[])} " \{"
    append code \n$cbody \n\}\n
}
proc ::tcc4tcl::wrapExport {name cmds {body ""}} {
    set code "DLL_EXPORT int [string totitle $name]_Init(Tcl_Interp *interp)"
    append code " \{\n"
    foreach {tclname cname} $cmds {
        append code \
            "Tcl_CreateObjCommand(interp,\"$tclname\",$cname,NULL,NULL);\n"
    }
    append code $body
    append code "\nreturn TCL_OK;\n\}"
}
#---------------------------------------------------------------------
proc ::tcc4tcl::cproc {name adefs rtype {body "#"}} {
  foreach {code cbody} [wrap $name $adefs $rtype $body] break
  ccode $code
  set ns [namespace current]
  uplevel 1 [list ${ns}::ccommand $name {dummy ip objc objv} $cbody]
}
#---------------------------------------------------------------------
proc ::tcc4tcl::cdata {name data} {
  # Extract bytes from data
  binary scan $data c* bytes
    set inittext "\n"
  set line ""
  set n 0
  set l 0
  foreach c $bytes {

  append cbody "Tcl_SetByteArrayObj(Tcl_GetObjResult(ip), (unsigned char*) script, $count);\n"
  append cbody "return TCL_OK;" "\n"
  set ns [namespace current]
  uplevel 1 [list ${ns}::ccommand $name {dummy ip objc objv} $cbody]
  return $name
}
#-------------------------------------------------------------------
proc ::tcc4tcl::ccommand {procname anames args} {
  variable tcc
  # Fully qualified proc name
  if {[string match "::*" $procname]} {
    # procname is already absolute
  } else {
    set nsfrom [uplevel 1 {namespace current}]    
    if {$nsfrom eq "::"} {set nsfrom ""}

  append code "}" "\n"
  set ns [namespace current]
  uplevel 1 [list ${ns}::cc $code]
  Log "CREATING TCL COMMAND $procname / $cname"
  uplevel 1 [list $tcc(cc) command $procname $cname]
  unset tcc(cc) ;# can't be used for compiling anymore
}
proc ::tcc4tcl::tk {args} {
  variable tcc
  set tcc(tk) 1
}
::tcc4tcl::reset
namespace eval tcc4tcl {namespace export cproc ccode cdata}