127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/*************************************************************************/
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/* */
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/* Objective Caml LablTk library */
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/* */
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/* Francois Rouaix, Francois Pessaux and Jun Furuse */
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/* projet Cristal, INRIA Rocquencourt */
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/* Jacques Garrigue, Kyoto University RIMS */
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/* */
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/* Copyright 1999 Institut National de Recherche en Informatique et */
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/* en Automatique and Kyoto University. All rights reserved. */
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/* This file is distributed under the terms of the GNU Library */
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/* General Public License. */
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/* */
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/*************************************************************************/
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/* $Id$ */
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/* Alternative to tkwait variable */
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#include <string.h>
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#include <tcl.h>
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#include <tk.h>
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#include <caml/mlvalues.h>
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#include <caml/memory.h>
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#include "camltk.h"
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value camltk_getvar(var) /* ML */
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value var;
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{
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char *s;
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char *stable_var = NULL;
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CheckInit();
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stable_var = string_to_c(var);
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s = Tcl_GetVar(cltclinterp,stable_var,
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TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG);
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stat_free(stable_var);
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if (s == NULL)
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tk_error(cltclinterp->result);
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else
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return(copy_string(s));
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}
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value camltk_setvar(var,contents) /* ML */
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value var;
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value contents;
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{
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char *s;
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char *stable_var = NULL;
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CheckInit();
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/* SetVar makes a copy of the contents. */
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/* In case we have write traces in Caml, it's better to make sure that
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var doesn't move... */
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stable_var = string_to_c(var);
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s = Tcl_SetVar(cltclinterp,stable_var, String_val(contents),
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TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG);
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stat_free(stable_var);
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if (s == NULL)
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tk_error(cltclinterp->result);
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else
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return(Val_unit);
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}
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/* The appropriate type is
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typedef char *(Tcl_VarTraceProc) _ANSI_ARGS_((ClientData clientData,
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Tcl_Interp *interp, char *part1, char *part2, int flags));
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*/
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static char * tracevar(clientdata, interp, name1, name2, flags)
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ClientData clientdata;
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Tcl_Interp *interp; /* Interpreter containing variable. */
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char *name1; /* Name of variable. */
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char *name2; /* Second part of variable name. */
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int flags; /* Information about what happened. */
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{
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Tcl_UntraceVar2(interp, name1, name2,
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TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
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tracevar, clientdata);
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callback2(*handler_code,Val_int(clientdata),Val_unit);
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return (char *)NULL;
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}
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/* Sets up a callback upon modification of a variable */
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value camltk_trace_var(var,cbid) /* ML */
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value var;
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value cbid;
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{
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char *cvar = NULL;
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CheckInit();
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/* Make a copy of var, since Tcl will modify it in place, and we
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* don't trust that much what it will do here
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*/
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cvar = string_to_c(var);
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if (Tcl_TraceVar(cltclinterp, cvar,
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TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
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tracevar,
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(ClientData) (Long_val(cbid)))
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!= TCL_OK) {
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stat_free(cvar);
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tk_error(cltclinterp->result);
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};
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stat_free(cvar);
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return Val_unit;
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}
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value camltk_untrace_var(var,cbid) /* ML */
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value var;
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value cbid;
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{
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char *cvar = NULL;
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CheckInit();
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/* Make a copy of var, since Tcl will modify it in place, and we
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* don't trust that much what it will do here
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*/
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cvar = string_to_c(var);
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Tcl_UntraceVar(cltclinterp, cvar,
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TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
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tracevar,
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(ClientData) (Long_val(cbid)));
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stat_free(cvar);
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return Val_unit;
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}
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