make-c-ext.tcl

   1 #!/usr/bin/env tclsh
   2
   3 # Usage: make-c-ext.tcl source.tcl >jim-source.c
   4
   5 # Converts a Tcl source file into C source suitable
   6 # for loading as a static extension.
   7
   8 lassign $argv source
   9
  10 if {![string match *.tcl $source]} {
  11         error "Source $source is not a .tcl file"
  12 }
  13
  14 # Read the Tcl source and convert to C
  15 # Note that no lines are removed in order to preserve line numbering
  16 set sourcelines {}
  17 set f [open $source]
  18 while {[gets $f buf] >= 0} {
  19         # Remove comment lines
  20         regsub {^[ \t]*#.*$} $buf "" buf
  21         # Escape quotes and backlashes
  22         set buf [string map [list \\ \\\\ \" \\"] $buf]
  23         lappend sourcelines \"$buf\\n\"
  24 }
  25 close $f
  26
  27 lappend lines {/* autogenerated - do not edit */}
  28 lappend lines {#include <jim.h>}
  29 set basename [file tail $source]
  30 set pkgname [file rootname $basename]
  31
  32 lappend lines "int Jim_${pkgname}Init(Jim_Interp *interp)"
  33 lappend lines "\{"
  34 lappend lines "\tif (Jim_PackageProvide(interp, \"$pkgname\", \"1.0\", JIM_ERRMSG)) return JIM_ERR;"
  35 lappend lines "\treturn Jim_EvalSource(interp, \"$basename\", 1, [join $sourcelines \n]);"
  36 lappend lines "\}"
  37
  38 puts [join $lines \n]