Initial revision

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/tcltklib/tcltklib.c

@@ -0,0 +1,216 @@
+/*
+ *	tcltklib.c
+ *		Aug. 27, 1997	Y. Shigehiro
+ *		Oct. 24, 1997	Y. Matsumoto
+ */
+
+#include "ruby.h"
+#include "sig.h"
+#include <stdio.h>
+#include <string.h>
+#include <tcl.h>
+#include <tk.h>
+
+/* for debug */
+
+#define DUMP1(ARG1) if (debug) { fprintf(stderr, "tcltklib: %s\n", ARG1);}
+#define DUMP2(ARG1, ARG2) if (debug) { fprintf(stderr, "tcltklib: ");\
+fprintf(stderr, ARG1, ARG2); fprintf(stderr, "\n"); }
+/*
+#define DUMP1(ARG1)
+#define DUMP2(ARG1, ARG2)
+*/
+
+/* from tkAppInit.c */
+
+/*
+ * The following variable is a special hack that is needed in order for
+ * Sun shared libraries to be used for Tcl.
+ */
+
+extern int matherr();
+int *tclDummyMathPtr = (int *) matherr;
+
+/*---- module TclTkLib ----*/
+
+static VALUE thread_safe = Qnil;
+
+/* execute Tk_MainLoop */
+static VALUE
+lib_mainloop(VALUE self)
+{
+    int old_trapflg;
+    int flags = RTEST(thread_safe)?TCL_DONT_WAIT:0;
+
+    DUMP1("start Tk_Mainloop");
+    while (Tk_GetNumMainWindows() > 0) {
+	old_trapflg = trap_immediate;
+	trap_immediate = 1;
+        Tcl_DoOneEvent(flags);
+	trap_immediate = old_trapflg;
+	CHECK_INTS;
+	flags = (thread_safe == 0 || thread_safe == Qnil)?0:TCL_DONT_WAIT;
+    }
+    DUMP1("stop Tk_Mainloop");
+
+    return Qnil;
+}
+
+/*---- class TclTkIp ----*/
+struct tcltkip {
+    Tcl_Interp *ip;		/* the interpreter */
+    int return_value;		/* return value */
+};
+
+/* Tcl command `ruby' */
+static VALUE
+ip_eval_rescue(VALUE *failed, VALUE einfo)
+{
+    *failed = einfo;
+    return Qnil;
+}
+
+static int
+ip_ruby(ClientData clientData, Tcl_Interp *interp, int argc, char *argv[])
+{
+    VALUE res;
+    int old_trapflg;
+    VALUE failed = 0;
+
+    /* ruby command has 1 arg. */
+    if (argc != 2) {
+	ArgError("wrong # of arguments (%d for 1)", argc);
+    }
+
+    /* evaluate the argument string by ruby */
+    DUMP2("rb_eval_string(%s)", argv[1]);
+    old_trapflg = trap_immediate;
+    trap_immediate = 0;
+    res = rb_rescue(rb_eval_string, argv[1], ip_eval_rescue, &failed);
+    trap_immediate = old_trapflg;
+
+    if (failed) {
+	Tcl_AppendResult(interp, RSTRING(failed)->ptr, (char*)NULL);
+	return TCL_ERROR;
+    }
+
+    /* result must be string or nil */
+    if (NIL_P(res)) {
+	DUMP1("(rb_eval_string result) nil");
+	return TCL_OK;
+    }
+    Check_Type(res, T_STRING);
+
+    /* copy result to the tcl interpreter */
+    DUMP2("(rb_eval_string result) %s", RSTRING(res)->ptr);
+    DUMP1("Tcl_AppendResult");
+    Tcl_AppendResult(interp, RSTRING(res)->ptr, (char *)NULL);
+
+    return TCL_OK;
+}
+
+/* destroy interpreter */
+static void
+ip_free(struct tcltkip *ptr)
+{
+    DUMP1("Tcl_DeleteInterp");
+    Tcl_DeleteInterp(ptr->ip);
+}
+
+/* create and initialize interpreter */
+static VALUE
+ip_new(VALUE self)
+{
+    struct tcltkip *ptr;	/* tcltkip data struct */
+    VALUE obj;			/* newly created object */
+
+    /* create object */
+    obj = Data_Make_Struct(self, struct tcltkip, 0, ip_free, ptr);
+    ptr->return_value = 0;
+
+    /* from Tk_Main() */
+    DUMP1("Tcl_CreateInterp");
+    ptr->ip = Tcl_CreateInterp();
+
+    /* from Tcl_AppInit() */
+    DUMP1("Tcl_Init");
+    if (Tcl_Init(ptr->ip) == TCL_ERROR) {
+	Fail("Tcl_Init");
+    }
+    DUMP1("Tk_Init");
+    if (Tk_Init(ptr->ip) == TCL_ERROR) {
+	Fail("Tk_Init");
+    }
+    DUMP1("Tcl_StaticPackage(\"Tk\")");
+    Tcl_StaticPackage(ptr->ip, "Tk", Tk_Init,
+		      (Tcl_PackageInitProc *) NULL);
+
+    /* add ruby command to the interpreter */
+    DUMP1("Tcl_CreateCommand(\"ruby\")");
+    Tcl_CreateCommand(ptr->ip, "ruby", ip_ruby, (ClientData *)NULL,
+		      (Tcl_CmdDeleteProc *)NULL);
+
+    return obj;
+}
+
+/* eval string in tcl by Tcl_Eval() */
+static VALUE
+ip_eval(VALUE self, VALUE str)
+{
+    char *buf;			/* Tcl_Eval requires re-writable string region */
+    struct tcltkip *ptr;	/* tcltkip data struct */
+
+    /* get the data struct */
+    Data_Get_Struct(self, struct tcltkip, ptr);
+
+    /* call Tcl_Eval() */
+    Check_Type(str, T_STRING);
+    buf = ALLOCA_N(char,RSTRING(str)->len+1);
+    strcpy(buf, RSTRING(str)->ptr);
+    DUMP2("Tcl_Eval(%s)", buf);
+    ptr->return_value = Tcl_Eval(ptr->ip, buf);
+    if (ptr->return_value == TCL_ERROR) {
+	Fail(ptr->ip->result);
+    }
+    DUMP2("(TCL_Eval result) %d", ptr->return_value);
+
+    /* pass back the result (as string) */
+    return(str_new2(ptr->ip->result));
+}
+
+/* get return code from Tcl_Eval() */
+static VALUE
+ip_retval(VALUE self)
+{
+    struct tcltkip *ptr;	/* tcltkip data struct */
+
+    /* get the data strcut */
+    Data_Get_Struct(self, struct tcltkip, ptr);
+
+    return (INT2FIX(ptr->return_value));
+}
+
+/*---- initialization ----*/
+void Init_tcltklib()
+{
+    extern VALUE rb_argv0;	/* the argv[0] */
+
+    VALUE lib = rb_define_module("TclTkLib");
+    VALUE ip = rb_define_class("TclTkIp", cObject);
+
+    rb_define_module_function(lib, "mainloop", lib_mainloop, 0);
+
+    rb_define_singleton_method(ip, "new", ip_new, 0);
+    rb_define_method(ip, "_eval", ip_eval, 1);
+    rb_define_method(ip, "_return_value", ip_retval, 0);
+    rb_define_method(ip, "mainloop", lib_mainloop, 0);
+
+    /*---- initialize tcl/tk libraries ----*/
+    /* from Tk_Main() */
+    DUMP1("Tcl_FindExecutable");
+    Tcl_FindExecutable(RSTRING(rb_argv0)->ptr);
+
+    rb_define_variable("$tk_thread_safe", &thread_safe);
+}
+
+/* eof */