tcc4tcl::cproc

package require tcc4tcl

Creates a Tcl procedure in the current process that calls C code.

Synopsis:

1. tcc4tcl::cproc <procName> <argList> <returnType> <code>
   1. <procName> is the name of the Tcl procedure to create
   2. <argList> is a list of arguments and their types for the C function;
      1. The list is in the format of: type1 name1 type2 name2 ... typeN nameN
      2. The supported types are:
         1. Tcl_Interp*: Must be first argument, will be the interpreter and the user will not need to pass this parameter
         2. int
         3. long
         4. float
         5. double
         6. char*
         7. Tcl_Obj*: Passes the Tcl object in unchanged
         8. void*
   3. <returnType> is the return type for the C function
      1. The supported types are:
         1. void: No return value
         2. ok: Return TCL_OK or TCL_ERROR
         3. int
         4. long
         5. float
         6. double
         7. char*: TCL_STATIC string (immutable from C -- use this for constants)
         8. string, dstring: return a (char*) that is a TCL_DYNAMIC string (allocated from Tcl_Alloc, will be managed by Tcl)
         9. vstring: return a (char*) that is a TCL_VOLATILE string (mutable from C, will be copied be Tcl -- use this for local variables)
         10. default: Tcl_Obj*, a Tcl Object
   4. <code> is the C code that comprises the function

Examples:

1. Create a Tcl procedure called "add" which accepts 2 integers (a, b) and returns a long:
   1. tcc4tcl::cproc add {int a int b} long { return(a+b); }
2. Create a Tcl procedure called "mkdir" which accepts a Tcl_Obj* and returns a return code:
   1. tcc4tcl::cproc mkdir {Tcl_Interp* interp char* dir} ok { int mkdir_ret; mkdir_ret = mkdir(dir); if (mkdir_ret != 0) { Tcl_SetObjResult(interp, Tcl_NewStringObj("failed", -1)); return(TCL_ERROR); }; return(TCL_OK); }