D 2014-06-22T22:17:20.357
L tcc4tcl::cproc
N text/x-markdown
U rkeene
W 1970
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
1. `<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
1. 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
1. int
1. long
1. float
1. double
1. char*
1. Tcl_Obj*: Passes the Tcl object in unchanged
1. void*
1. `<returnType>` is the return type for the C function
1. The supported types are:
1. void: No return value
1. ok: Return TCL\_OK or TCL_ERROR
1. int
1. long
1. float
1. double
1. char*: TCL\_STATIC string (immutable from C -- use this for constants)
1. string, dstring: return a (char*) that is a TCL\_DYNAMIC string (allocated from Tcl\_Alloc, will be managed by Tcl)
1. vstring: return a (char*) that is a TCL\_VOLATILE string (mutable from C, will be copied be Tcl -- use this for local variables)
1. default: Tcl\_Obj*, a Tcl Object
1. `<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); }`
Z 41a85cc903e79520f55df10db4cce0df