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/*
* tkIcu.c --
*
* tkIcu.c implements various Tk commands which can find
* grapheme cluster and workchar bounderies in Unicode strings.
*
* Copyright © 2021 Jan Nijtmans
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tkInt.h"
/*
* Runtime linking of libicu.
*/
typedef enum UBreakIteratorTypex {
UBRK_CHARACTERX = 0,
UBRK_WORDX = 1
} UBreakIteratorTypex;
typedef enum UErrorCodex {
U_ZERO_ERRORZ = 0 /**< No error, no warning. */
} UErrorCodex;
typedef void *(*fn_icu_open)(UBreakIteratorTypex, const char *,
const uint16_t *, int32_t, UErrorCodex *);
typedef void (*fn_icu_close)(void *);
typedef int32_t (*fn_icu_preceding)(void *, int32_t);
typedef int32_t (*fn_icu_following)(void *, int32_t);
static struct {
int nopen;
Tcl_LoadHandle lib;
fn_icu_open open;
fn_icu_close close;
fn_icu_preceding preceding;
fn_icu_following following;
} icu_fns = {
0, NULL, NULL, NULL, NULL, NULL
};
#define icu_open icu_fns.open
#define icu_close icu_fns.close
#define icu_preceding icu_fns.preceding
#define icu_following icu_fns.following
TCL_DECLARE_MUTEX(icu_mutex);
int
Icu_Init(
Tcl_Interp *interp)
{
Tcl_MutexLock(&icu_mutex);
if (icu_fns.nopen == 0) {
int i = 0;
Tcl_Obj *nameobj;
static const char *iculibs[] = {
"libicuuc68.so",
NULL
};
while (iculibs[i] != NULL) {
Tcl_ResetResult(interp);
nameobj = Tcl_NewStringObj(iculibs[i], -1);
Tcl_IncrRefCount(nameobj);
if (Tcl_LoadFile(interp, nameobj, NULL, 0, NULL, &icu_fns.lib)
== TCL_OK) {
Tcl_DecrRefCount(nameobj);
break;
}
Tcl_DecrRefCount(nameobj);
++i;
}
if (icu_fns.lib != NULL) {
#define ICU_SYM(name) \
icu_fns.name = (fn_icu_ ## name) \
Tcl_FindSymbol(NULL, icu_fns.lib, "ubrk_" #name "_86")
ICU_SYM(open);
ICU_SYM(close);
ICU_SYM(preceding);
ICU_SYM(following);
#undef ICU_SYM
}
}
icu_fns.nopen++;
Tcl_MutexUnlock(&icu_mutex);
//Tcl_CreateObjCommand(interp, "::tk::endOfCluster", endOfClusterCmd,
// interp, NULL);
return TCL_OK;
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* coding: utf-8
* End:
*/
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