Merge branch 'sunweaver-pr/libnx-x11-autoreconf' into 3.6.x

Attributes GH PR #498: https://github.com/ArcticaProject/nx-libs/pull/498

1 files changed, 784 insertions, 0 deletions

diff --git a/nx-X11/lib/src/xkb/XKBBind.c b/nx-X11/lib/src/xkb/XKBBind.c
new file mode 100644
index 000000000..c679dc552
--- /dev/null
+++ b/nx-X11/lib/src/xkb/XKBBind.c
@@ -0,0 +1,784 @@
+/*
+
+Copyright 1985, 1987, 1994, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+*/
+
+        /* the new monsters ate the old ones */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "XKBlib.h"
+#include <nx-X11/Xlibint.h>
+#include <nx-X11/Xutil.h>
+#include <nx-X11/keysym.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include <nx-X11/extensions/XKBproto.h>
+#include "XKBlibint.h"
+
+#define AllMods (ShiftMask|LockMask|ControlMask| \
+                 Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask)
+
+static int _XkbLoadDpy(Display *dpy);
+
+struct _XKeytrans {
+    struct _XKeytrans *next;    /* next on list */
+    char *string;               /* string to return when the time comes */
+    int len;                    /* length of string (since NULL is legit) */
+    KeySym key;                 /* keysym rebound */
+    unsigned int state;         /* modifier state */
+    KeySym *modifiers;          /* modifier keysyms you want */
+    int mlen;                   /* length of modifier list */
+};
+
+KeySym
+XkbKeycodeToKeysym(Display *dpy,
+#if NeedWidePrototypes
+                   unsigned int kc,
+#else
+                   KeyCode kc,
+#endif
+                   int group,
+                   int level)
+{
+    XkbDescRec *xkb;
+
+    if (_XkbUnavailable(dpy))
+        return NoSymbol;
+
+    _XkbCheckPendingRefresh(dpy, dpy->xkb_info);
+
+    xkb = dpy->xkb_info->desc;
+    if ((kc < xkb->min_key_code) || (kc > xkb->max_key_code))
+        return NoSymbol;
+
+    if ((group < 0) || (level < 0) || (group >= XkbKeyNumGroups(xkb, kc)))
+        return NoSymbol;
+    if (level >= XkbKeyGroupWidth(xkb, kc, group)) {
+        /* for compatibility with the core protocol, _always_ allow  */
+        /* two symbols in the first two groups.   If either of the   */
+        /* two is of type ONE_LEVEL, just replicate the first symbol */
+        if ((group > XkbGroup2Index) || (XkbKeyGroupWidth(xkb, kc, group) != 1)
+            || (level != 1)) {
+            return NoSymbol;
+        }
+        level = 0;
+    }
+    return XkbKeySymEntry(xkb, kc, level, group);
+}
+
+KeySym
+XKeycodeToKeysym(Display *dpy,
+#if NeedWidePrototypes
+                 unsigned int kc,
+#else
+                 KeyCode kc,
+#endif
+                 int col)
+{
+    XkbDescRec *xkb;
+
+    if (_XkbUnavailable(dpy))
+        return _XKeycodeToKeysym(dpy, kc, col);
+
+    _XkbCheckPendingRefresh(dpy, dpy->xkb_info);
+
+    xkb = dpy->xkb_info->desc;
+    if ((kc < xkb->min_key_code) || (kc > xkb->max_key_code))
+        return NoSymbol;
+
+    if (col > 3) {
+        int lastSym, tmp, nGrp;
+
+        lastSym = 3;
+        nGrp = XkbKeyNumGroups(xkb, kc);
+        if ((nGrp > 0) &&
+            ((tmp = XkbKeyGroupWidth(xkb, kc, XkbGroup1Index)) > 2)) {
+            if (col <= (lastSym + tmp - 2))
+                return XkbKeycodeToKeysym(dpy, kc, XkbGroup1Index,
+                                          col - lastSym + 2);
+            lastSym += tmp - 2;
+        }
+        if ((nGrp > 1) &&
+            ((tmp = XkbKeyGroupWidth(xkb, kc, XkbGroup2Index)) > 2)) {
+            if (col <= (lastSym + tmp - 2))
+                return XkbKeycodeToKeysym(dpy, kc, XkbGroup2Index,
+                                          col - lastSym + 2);
+            lastSym += tmp - 2;
+        }
+        if (nGrp > 2) {
+            tmp = XkbKeyGroupWidth(xkb, kc, XkbGroup3Index);
+            if (col <= lastSym + tmp)
+                return XkbKeycodeToKeysym(dpy, kc, XkbGroup3Index,
+                                          col - lastSym);
+            lastSym += tmp;
+        }
+        if (nGrp > 3) {
+            tmp = XkbKeyGroupWidth(xkb, kc, XkbGroup4Index);
+            if (col <= lastSym + tmp)
+                return XkbKeycodeToKeysym(dpy, kc, XkbGroup4Index,
+                                          col - lastSym);
+        }
+        return NoSymbol;
+    }
+    return XkbKeycodeToKeysym(dpy, kc, (col >> 1), (col & 1));
+}
+
+KeyCode
+XKeysymToKeycode(Display *dpy, KeySym ks)
+{
+    register int i, j, gotOne;
+
+    if (_XkbUnavailable(dpy))
+        return _XKeysymToKeycode(dpy, ks);
+    _XkbCheckPendingRefresh(dpy, dpy->xkb_info);
+
+    j = 0;
+    do {
+        register XkbDescRec *xkb = dpy->xkb_info->desc;
+        gotOne = 0;
+        for (i = dpy->min_keycode; i <= dpy->max_keycode; i++) {
+            if (j < (int) XkbKeyNumSyms(xkb, i)) {
+                gotOne = 1;
+                if ((XkbKeySym(xkb, i, j) == ks))
+                    return i;
+            }
+        }
+        j++;
+    } while (gotOne);
+    return 0;
+}
+
+static int
+_XkbComputeModmap(Display *dpy)
+{
+    register XkbDescPtr xkb;
+
+    xkb = dpy->xkb_info->desc;
+    if (XkbGetUpdatedMap(dpy, XkbModifierMapMask, xkb) == Success)
+        return 1;
+    return 0;
+}
+
+unsigned
+XkbKeysymToModifiers(Display *dpy, KeySym ks)
+{
+    XkbDescRec *xkb;
+    register int i, j;
+    register KeySym *pSyms;
+    CARD8 mods;
+
+    if (_XkbUnavailable(dpy))
+        return _XKeysymToModifiers(dpy, ks);
+    _XkbCheckPendingRefresh(dpy, dpy->xkb_info);
+
+    if (_XkbNeedModmap(dpy->xkb_info) && (!_XkbComputeModmap(dpy)))
+        return _XKeysymToModifiers(dpy, ks);
+
+    xkb = dpy->xkb_info->desc;
+    mods = 0;
+    for (i = xkb->min_key_code; i <= (int) xkb->max_key_code; i++) {
+        pSyms = XkbKeySymsPtr(xkb, i);
+        for (j = XkbKeyNumSyms(xkb, i) - 1; j >= 0; j--) {
+            if (pSyms[j] == ks) {
+                mods |= xkb->map->modmap[i];
+                break;
+            }
+        }
+    }
+    return mods;
+}
+
+KeySym
+XLookupKeysym(register XKeyEvent * event, int col)
+{
+    Display *dpy = event->display;
+
+    if (_XkbUnavailable(dpy))
+        return _XLookupKeysym(event, col);
+    _XkbCheckPendingRefresh(dpy, dpy->xkb_info);
+    return XKeycodeToKeysym(dpy, event->keycode, col);
+}
+
+   /*
+    * Not a public entry point -- XkbTranslateKey is an obsolete name
+    * that is preserved here so that functions linked against the old
+    * version will continue to work in a shared library environment.
+    */
+int
+XkbTranslateKey(register Display *dpy,
+                KeyCode key,
+                register unsigned int mods,
+                unsigned int *mods_rtrn,
+                KeySym *keysym_rtrn);
+
+int
+XkbTranslateKey(register Display *dpy,
+                KeyCode key,
+                register unsigned int mods,
+                unsigned int *mods_rtrn,
+                KeySym *keysym_rtrn)
+{
+    return XkbLookupKeySym(dpy, key, mods, mods_rtrn, keysym_rtrn);
+}
+
+Bool
+XkbLookupKeySym(register Display *dpy,
+                KeyCode key,
+                register unsigned int mods,
+                unsigned int *mods_rtrn,
+                KeySym *keysym_rtrn)
+{
+    if (_XkbUnavailable(dpy))
+        return _XTranslateKey(dpy, key, mods, mods_rtrn, keysym_rtrn);
+    _XkbCheckPendingRefresh(dpy, dpy->xkb_info);
+    return XkbTranslateKeyCode(dpy->xkb_info->desc, key, mods, mods_rtrn,
+                               keysym_rtrn);
+}
+
+Bool
+XkbTranslateKeyCode(register XkbDescPtr xkb,
+                    KeyCode key,
+                    register unsigned int mods,
+                    unsigned int *mods_rtrn,
+                    KeySym *keysym_rtrn)
+{
+    XkbKeyTypeRec *type;
+    int col, nKeyGroups;
+    unsigned preserve, effectiveGroup;
+    KeySym *syms;
+
+    if (mods_rtrn != NULL)
+        *mods_rtrn = 0;
+
+    nKeyGroups = XkbKeyNumGroups(xkb, key);
+    if ((!XkbKeycodeInRange(xkb, key)) || (nKeyGroups == 0)) {
+        if (keysym_rtrn != NULL)
+            *keysym_rtrn = NoSymbol;
+        return False;
+    }
+
+    syms = XkbKeySymsPtr(xkb, key);
+
+    /* find the offset of the effective group */
+    col = 0;
+    effectiveGroup = XkbGroupForCoreState(mods);
+    if (effectiveGroup >= nKeyGroups) {
+        unsigned groupInfo = XkbKeyGroupInfo(xkb, key);
+
+        switch (XkbOutOfRangeGroupAction(groupInfo)) {
+        default:
+            effectiveGroup %= nKeyGroups;
+            break;
+        case XkbClampIntoRange:
+            effectiveGroup = nKeyGroups - 1;
+            break;
+        case XkbRedirectIntoRange:
+            effectiveGroup = XkbOutOfRangeGroupNumber(groupInfo);
+            if (effectiveGroup >= nKeyGroups)
+                effectiveGroup = 0;
+            break;
+        }
+    }
+    col = effectiveGroup * XkbKeyGroupsWidth(xkb, key);
+    type = XkbKeyKeyType(xkb, key, effectiveGroup);
+
+    preserve = 0;
+    if (type->map) {  /* find the column (shift level) within the group */
+        register int i;
+        register XkbKTMapEntryPtr entry;
+
+        for (i = 0, entry = type->map; i < type->map_count; i++, entry++) {
+            if ((entry->active) &&
+                ((mods & type->mods.mask) == entry->mods.mask)) {
+                col += entry->level;
+                if (type->preserve)
+                    preserve = type->preserve[i].mask;
+                break;
+            }
+        }
+    }
+
+    if (keysym_rtrn != NULL)
+        *keysym_rtrn = syms[col];
+    if (mods_rtrn) {
+        *mods_rtrn = type->mods.mask & (~preserve);
+        /* The Motif VTS doesn't get the help callback called if help
+         * is bound to Shift+<whatever>, and it appears as though it
+         * is XkbTranslateKeyCode that is causing the problem.  The
+         * core X version of XTranslateKey always OR's in ShiftMask
+         * and LockMask for mods_rtrn, so this "fix" keeps this behavior
+         * and solves the VTS problem.
+         */
+        if ((xkb->dpy) && (xkb->dpy->xkb_info) &&
+            (xkb->dpy->xkb_info->
+             xlib_ctrls & XkbLC_AlwaysConsumeShiftAndLock)) {
+            *mods_rtrn |= (ShiftMask | LockMask);
+        }
+    }
+    return (syms[col] != NoSymbol);
+}
+
+Status
+XkbRefreshKeyboardMapping(register XkbMapNotifyEvent * event)
+{
+    Display *dpy = event->display;
+    XkbInfoPtr xkbi;
+
+    if (_XkbUnavailable(dpy)) {
+        _XRefreshKeyboardMapping((XMappingEvent *) event);
+        return Success;
+    }
+    xkbi = dpy->xkb_info;
+
+    if (((event->type & 0x7f) - xkbi->codes->first_event) != XkbEventCode)
+        return BadMatch;
+    if (event->xkb_type == XkbNewKeyboardNotify) {
+        _XkbReloadDpy(dpy);
+        return Success;
+    }
+    if (event->xkb_type == XkbMapNotify) {
+        XkbMapChangesRec changes;
+        Status rtrn;
+
+        if (xkbi->flags & XkbMapPending)
+            changes = xkbi->changes;
+        else
+            bzero(&changes, sizeof(changes));
+        XkbNoteMapChanges(&changes, event, XKB_XLIB_MAP_MASK);
+        if ((rtrn = XkbGetMapChanges(dpy, xkbi->desc, &changes)) != Success) {
+#ifdef DEBUG
+            fprintf(stderr, "Internal Error! XkbGetMapChanges failed:\n");
+#endif
+            xkbi->changes = changes;
+        }
+        else if (xkbi->flags & XkbMapPending) {
+            xkbi->flags &= ~XkbMapPending;
+            bzero(&xkbi->changes, sizeof(XkbMapChangesRec));
+        }
+        return rtrn;
+    }
+    return BadMatch;
+}
+
+int
+XRefreshKeyboardMapping(register XMappingEvent * event)
+{
+    XkbEvent *xkbevent = (XkbEvent *) event;
+    Display *dpy = event->display;
+    XkbMapChangesRec changes;
+    XkbInfoPtr xkbi;
+
+    /* always do this for input methods, which still use the old keymap */
+    (void) _XRefreshKeyboardMapping(event);
+
+    if (_XkbUnavailable(dpy))
+        return 1;
+
+    xkbi = dpy->xkb_info;
+
+    if (((event->type & 0x7f) - xkbi->codes->first_event) == XkbEventCode)
+        return XkbRefreshKeyboardMapping(&xkbevent->map);
+
+    if (xkbi->flags & XkbXlibNewKeyboard) {
+        _XkbReloadDpy(dpy);
+        return 1;
+    }
+
+    if ((xkbi->flags & XkbMapPending) || (event->request == MappingKeyboard)) {
+        if (xkbi->flags & XkbMapPending) {
+            changes = xkbi->changes;
+            _XkbNoteCoreMapChanges(&changes, event, XKB_XLIB_MAP_MASK);
+        }
+        else {
+            bzero(&changes, sizeof(changes));
+            changes.changed = XkbKeySymsMask;
+            if (xkbi->desc->min_key_code < xkbi->desc->max_key_code) {
+                changes.first_key_sym = xkbi->desc->min_key_code;
+                changes.num_key_syms = xkbi->desc->max_key_code -
+                    xkbi->desc->min_key_code + 1;
+            }
+            else {
+                changes.first_key_sym = event->first_keycode;
+                changes.num_key_syms = event->count;
+            }
+        }
+
+        if (XkbGetMapChanges(dpy, xkbi->desc, &changes) != Success) {
+#ifdef DEBUG
+            fprintf(stderr, "Internal Error! XkbGetMapChanges failed:\n");
+            if (changes.changed & XkbKeyTypesMask) {
+                int first = changes.first_type;
+                int last = changes.first_type + changes.num_types - 1;
+
+                fprintf(stderr, "       types:  %d..%d\n", first, last);
+            }
+            if (changes.changed & XkbKeySymsMask) {
+                int first = changes.first_key_sym;
+                int last = changes.first_key_sym + changes.num_key_syms - 1;
+
+                fprintf(stderr, "     symbols:  %d..%d\n", first, last);
+            }
+            if (changes.changed & XkbKeyActionsMask) {
+                int first = changes.first_key_act;
+                int last = changes.first_key_act + changes.num_key_acts - 1;
+
+                fprintf(stderr, "     acts:  %d..%d\n", first, last);
+            }
+            if (changes.changed & XkbKeyBehaviorsMask) {
+                int first = changes.first_key_behavior;
+                int last = first + changes.num_key_behaviors - 1;
+
+                fprintf(stderr, "   behaviors:  %d..%d\n", first, last);
+            }
+            if (changes.changed & XkbVirtualModsMask) {
+                fprintf(stderr, "virtual mods: 0x%04x\n", changes.vmods);
+            }
+            if (changes.changed & XkbExplicitComponentsMask) {
+                int first = changes.first_key_explicit;
+                int last = first + changes.num_key_explicit - 1;
+
+                fprintf(stderr, "    explicit:  %d..%d\n", first, last);
+            }
+#endif
+        }
+        LockDisplay(dpy);
+        if (xkbi->flags & XkbMapPending) {
+            xkbi->flags &= ~XkbMapPending;
+            bzero(&xkbi->changes, sizeof(XkbMapChangesRec));
+        }
+        UnlockDisplay(dpy);
+    }
+    if (event->request == MappingModifier) {
+        LockDisplay(dpy);
+        if (xkbi->desc->map->modmap) {
+            _XkbFree(xkbi->desc->map->modmap);
+            xkbi->desc->map->modmap = NULL;
+        }
+        if (dpy->key_bindings) {
+            register struct _XKeytrans *p;
+
+            for (p = dpy->key_bindings; p; p = p->next) {
+                register int i;
+
+                p->state = 0;
+                if (p->mlen > 0) {
+                    for (i = 0; i < p->mlen; i++) {
+                        p->state |= XkbKeysymToModifiers(dpy, p->modifiers[i]);
+                    }
+                    if (p->state)
+                        p->state &= AllMods;
+                    else
+                        p->state = AnyModifier;
+                }
+            }
+        }
+        UnlockDisplay(dpy);
+    }
+    return 1;
+}
+
+static int
+_XkbLoadDpy(Display *dpy)
+{
+    XkbInfoPtr xkbi;
+    unsigned query, oldEvents;
+    XkbDescRec *desc;
+
+    if (!XkbUseExtension(dpy, NULL, NULL))
+        return 0;
+
+    xkbi = dpy->xkb_info;
+    query = XkbAllClientInfoMask;
+    desc = XkbGetMap(dpy, query, XkbUseCoreKbd);
+    if (!desc) {
+#ifdef DEBUG
+        fprintf(stderr, "Warning! XkbGetMap failed!\n");
+#endif
+        return 0;
+    }
+    LockDisplay(dpy);
+    xkbi->desc = desc;
+
+    UnlockDisplay(dpy);
+    oldEvents = xkbi->selected_events;
+    if (!(xkbi->xlib_ctrls & XkbLC_IgnoreNewKeyboards)) {
+        XkbSelectEventDetails(dpy, xkbi->desc->device_spec,
+                              XkbNewKeyboardNotify,
+                              XkbNKN_KeycodesMask | XkbNKN_DeviceIDMask,
+                              XkbNKN_KeycodesMask | XkbNKN_DeviceIDMask);
+    }
+    XkbSelectEventDetails(dpy, xkbi->desc->device_spec, XkbMapNotify,
+                          XkbAllClientInfoMask, XkbAllClientInfoMask);
+    LockDisplay(dpy);
+    xkbi->selected_events = oldEvents;
+    UnlockDisplay(dpy);
+    return 1;
+}
+
+void
+_XkbReloadDpy(Display *dpy)
+{
+    XkbInfoPtr xkbi;
+    XkbDescRec *desc;
+    unsigned oldDeviceID;
+
+    if (_XkbUnavailable(dpy))
+        return;
+
+    xkbi = dpy->xkb_info;
+    LockDisplay(dpy);
+    if (xkbi->desc) {
+        oldDeviceID = xkbi->desc->device_spec;
+        XkbFreeKeyboard(xkbi->desc, XkbAllComponentsMask, True);
+        xkbi->desc = NULL;
+        xkbi->flags &= ~(XkbMapPending | XkbXlibNewKeyboard);
+        xkbi->changes.changed = 0;
+    }
+    else
+        oldDeviceID = XkbUseCoreKbd;
+    UnlockDisplay(dpy);
+    desc = XkbGetMap(dpy, XkbAllClientInfoMask, XkbUseCoreKbd);
+    if (!desc)
+        return;
+    LockDisplay(dpy);
+    xkbi->desc = desc;
+    UnlockDisplay(dpy);
+
+    if (desc->device_spec != oldDeviceID) {
+        /* transfer(?) event masks here */
+#ifdef NOTYET
+        unsigned oldEvents;
+
+        oldEvents = xkbi->selected_events;
+        XkbSelectEventDetails(dpy, xkbi->desc->device_spec, XkbMapNotify,
+                              XkbAllMapComponentsMask, XkbAllClientInfoMask);
+        LockDisplay(dpy);
+        xkbi->selected_events = oldEvents;
+        UnlockDisplay(dpy);
+#endif
+    }
+    return;
+}
+
+int
+XkbTranslateKeySym(register Display *dpy,
+                   register KeySym *sym_rtrn,
+                   unsigned int mods,
+                   char *buffer,
+                   int nbytes,
+                   int *extra_rtrn)
+{
+    register XkbInfoPtr xkb;
+    XkbKSToMBFunc cvtr;
+    XPointer priv;
+    char tmp[4];
+    int n;
+
+    xkb = dpy->xkb_info;
+    if (!xkb->cvt.KSToMB) {
+        _XkbGetConverters(_XkbGetCharset(), &xkb->cvt);
+        _XkbGetConverters("ISO8859-1", &xkb->latin1cvt);
+    }
+
+    if (extra_rtrn)
+        *extra_rtrn = 0;
+
+    if ((buffer == NULL) || (nbytes == 0)) {
+        buffer = tmp;
+        nbytes = 4;
+    }
+
+    /* see if symbol rebound, if so, return that string. */
+    n = XkbLookupKeyBinding(dpy, *sym_rtrn, mods, buffer, nbytes, extra_rtrn);
+    if (n)
+        return n;
+
+    if (nbytes > 0)
+        buffer[0] = '\0';
+
+    if (xkb->cvt.KSToUpper && (mods & LockMask)) {
+        *sym_rtrn = (*xkb->cvt.KSToUpper) (*sym_rtrn);
+    }
+    if (xkb->xlib_ctrls & XkbLC_ForceLatin1Lookup) {
+        cvtr = xkb->latin1cvt.KSToMB;
+        priv = xkb->latin1cvt.KSToMBPriv;
+    }
+    else {
+        cvtr = xkb->cvt.KSToMB;
+        priv = xkb->cvt.KSToMBPriv;
+    }
+
+    n = (*cvtr) (priv, *sym_rtrn, buffer, nbytes, extra_rtrn);
+
+    if ((!xkb->cvt.KSToUpper) && (mods & LockMask)) {
+        register int i;
+        int change;
+
+        for (i = change = 0; i < n; i++) {
+            char ch = toupper(buffer[i]);
+            change = (change || (buffer[i] != ch));
+            buffer[i] = ch;
+        }
+        if (change) {
+            if (n == 1)
+                *sym_rtrn =
+                    (*xkb->cvt.MBToKS) (xkb->cvt.MBToKSPriv, buffer, n, NULL);
+            else
+                *sym_rtrn = NoSymbol;
+        }
+    }
+
+    if (mods & ControlMask) {
+        if (n == 1) {
+            buffer[0] = XkbToControl(buffer[0]);
+            if (nbytes > 1)
+                buffer[1] = '\0';
+            return 1;
+        }
+        if (nbytes > 0)
+            buffer[0] = '\0';
+        return 0;
+    }
+    return n;
+}
+
+int
+XLookupString(register XKeyEvent *event,
+              char *buffer,
+              int nbytes,
+              KeySym *keysym,
+              XComposeStatus *status)
+{
+    KeySym dummy;
+    int rtrnLen;
+    unsigned int new_mods;
+    Display *dpy = event->display;
+
+    if (keysym == NULL)
+        keysym = &dummy;
+    if (!XkbLookupKeySym(dpy, event->keycode, event->state, &new_mods, keysym))
+        return 0;
+    new_mods = (event->state & (~new_mods));
+
+    /* find the group where a symbol can be converted to control one */
+    if (new_mods & ControlMask && *keysym > 0x7F &&
+        (dpy->xkb_info->xlib_ctrls & XkbLC_ControlFallback)) {
+        XKeyEvent tmp_ev = *event;
+        KeySym tmp_keysym;
+        unsigned int tmp_new_mods;
+
+        if (_XkbUnavailable(dpy)) {
+            tmp_ev.state = event->state ^ dpy->mode_switch;
+            if (XkbLookupKeySym(dpy, tmp_ev.keycode, tmp_ev.state,
+                                &tmp_new_mods, &tmp_keysym) &&
+                tmp_keysym != NoSymbol && tmp_keysym < 0x80) {
+                *keysym = tmp_keysym;
+            }
+        }
+        else {
+            int n = XkbKeyNumGroups(dpy->xkb_info->desc, tmp_ev.keycode);
+            int i;
+
+            for (i = 0; i < n; i++) {
+                if (XkbGroupForCoreState(event->state) == i)
+                    continue;
+                tmp_ev.state = XkbBuildCoreState(tmp_ev.state, i);
+                if (XkbLookupKeySym(dpy, tmp_ev.keycode, tmp_ev.state,
+                                    &tmp_new_mods, &tmp_keysym) &&
+                    tmp_keysym != NoSymbol && tmp_keysym < 0x80) {
+                    *keysym = tmp_keysym;
+                    new_mods = (event->state & (~tmp_new_mods));
+                    break;
+                }
+            }
+        }
+    }
+
+    /* We *should* use the new_mods (which does not contain any modifiers */
+    /* that were used to compute the symbol here, but pre-XKB XLookupString */
+    /* did not and we have to remain compatible.  Sigh. */
+    if (_XkbUnavailable(dpy) ||
+        (dpy->xkb_info->xlib_ctrls & XkbLC_ConsumeLookupMods) == 0)
+        new_mods = event->state;
+
+    rtrnLen = XkbLookupKeyBinding(dpy, *keysym, new_mods, buffer, nbytes, NULL);
+    if (rtrnLen > 0)
+        return rtrnLen;
+
+    return XkbTranslateKeySym(dpy, keysym, new_mods, buffer, nbytes, NULL);
+}
+
+
+int
+XkbLookupKeyBinding(Display *dpy,
+                    register KeySym sym,
+                    unsigned int mods,
+                    char *buffer,
+                    int nbytes,
+                    int *extra_rtrn)
+{
+    register struct _XKeytrans *p;
+
+    if (extra_rtrn)
+        *extra_rtrn = 0;
+    for (p = dpy->key_bindings; p; p = p->next) {
+        if (((mods & AllMods) == p->state) && (sym == p->key)) {
+            int tmp = p->len;
+
+            if (tmp > nbytes) {
+                if (extra_rtrn)
+                    *extra_rtrn = (tmp - nbytes);
+                tmp = nbytes;
+            }
+            memcpy(buffer, p->string, tmp);
+            if (tmp < nbytes)
+                buffer[tmp] = '\0';
+            return tmp;
+        }
+    }
+    return 0;
+}
+
+char
+XkbToControl(char ch)
+{
+    register char c = ch;
+
+    if ((c >= '@' && c < '\177') || c == ' ')
+        c &= 0x1F;
+    else if (c == '2')
+        c = '\000';
+    else if (c >= '3' && c <= '7')
+        c -= ('3' - '\033');
+    else if (c == '8')
+        c = '\177';
+    else if (c == '/')
+        c = '_' & 0x1F;
+    return c;
+}