xref: /xsrc/external/mit/xkbcomp/dist/compat.c

/************************************************************
 Copyright (c) 1994 by Silicon Graphics Computer Systems, Inc.

 Permission to use, copy, modify, and distribute this
 software and its documentation for any purpose and without
 fee is hereby granted, provided that the above copyright
 notice appear in all copies and that both that copyright
 notice and this permission notice appear in supporting
 documentation, and that the name of Silicon Graphics not be
 used in advertising or publicity pertaining to distribution
 of the software without specific prior written permission.
 Silicon Graphics makes no representation about the suitability
 of this software for any purpose. It is provided "as is"
 without any express or implied warranty.

 SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
 GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
 THE USE OR PERFORMANCE OF THIS SOFTWARE.

 ********************************************************/

#include <X11/Xos.h>
#include "xkbcomp.h"
#include "tokens.h"
#include "expr.h"
#include "vmod.h"
#include "misc.h"
#include "indicators.h"
#include "action.h"
#include "compat.h"

typedef struct _SymInterpInfo
{
    CommonInfo defs;
    XkbSymInterpretRec interp;
} SymInterpInfo;

#define	_SI_VirtualMod		(1<<0)
#define	_SI_Action		(1<<1)
#define	_SI_AutoRepeat		(1<<2)
#define	_SI_LockingKey		(1<<3)
#define	_SI_LevelOneOnly	(1<<4)

typedef struct _GroupCompatInfo
{
    unsigned char fileID;
    unsigned char merge;
    Bool defined;
    unsigned char real_mods;
    unsigned short vmods;
} GroupCompatInfo;

typedef struct _CompatInfo
{
    char *name;
    unsigned fileID;
    int errorCount;
    int nInterps;
    SymInterpInfo *interps;
    SymInterpInfo dflt;
    LEDInfo ledDflt;
    GroupCompatInfo groupCompat[XkbNumKbdGroups];
    LEDInfo *leds;
    VModInfo vmods;
    ActionInfo *act;
    XkbDescPtr xkb;
} CompatInfo;

/***====================================================================***/

#define	ReportSINotArray(si,f,i) \
	ReportNotArray("symbol interpretation",(f),siText((si),(i)))
#define	ReportSIBadType(si,f,w,i) \
	ReportBadType("symbol interpretation",(f),siText((si),(i)),(w))

/***====================================================================***/

static char *
siText(const SymInterpInfo *si, const CompatInfo *info)
{
    static char buf[128];

    if (si == &info->dflt)
    {
        snprintf(buf, sizeof(buf), "default");
    }
    else
    {
        snprintf(buf, sizeof(buf), "%s+%s(%s)",
		XkbKeysymText(si->interp.sym, XkbMessage),
                XkbSIMatchText(si->interp.match, XkbMessage),
                XkbModMaskText(si->interp.mods, XkbMessage));
    }
    return buf;
}

static void
InitCompatInfo(CompatInfo * info, XkbDescPtr xkb)
{
    info->xkb = xkb;
    info->name = NULL;
    info->fileID = 0;
    info->errorCount = 0;
    info->nInterps = 0;
    info->interps = NULL;
    info->act = NULL;
    info->dflt.defs.fileID = info->fileID;
    info->dflt.defs.defined = 0;
    info->dflt.defs.merge = MergeOverride;
    info->dflt.interp.flags = 0;
    info->dflt.interp.virtual_mod = XkbNoModifier;
    info->dflt.interp.act.type = XkbSA_NoAction;
    for (int i = 0; i < XkbAnyActionDataSize; i++)
    {
        info->dflt.interp.act.data[i] = 0;
    }
    ClearIndicatorMapInfo(xkb->dpy, &info->ledDflt);
    info->ledDflt.defs.fileID = info->fileID;
    info->ledDflt.defs.defined = 0;
    info->ledDflt.defs.merge = MergeOverride;
    bzero(&info->groupCompat[0], XkbNumKbdGroups * sizeof(GroupCompatInfo));
    info->leds = NULL;
    InitVModInfo(&info->vmods, xkb);
    return;
}

static void
ClearCompatInfo(CompatInfo * info, XkbDescPtr xkb)
{
    free(info->name);
    info->name = NULL;
    info->dflt.defs.defined = 0;
    info->dflt.defs.merge = MergeAugment;
    info->dflt.interp.flags = 0;
    info->dflt.interp.virtual_mod = XkbNoModifier;
    info->dflt.interp.act.type = XkbSA_NoAction;
    for (int i = 0; i < XkbAnyActionDataSize; i++)
    {
        info->dflt.interp.act.data[i] = 0;
    }
    ClearIndicatorMapInfo(xkb->dpy, &info->ledDflt);
    info->nInterps = 0;
    info->interps = (SymInterpInfo *) ClearCommonInfo(&info->interps->defs);
    bzero(&info->groupCompat[0], XkbNumKbdGroups * sizeof(GroupCompatInfo));
    info->leds = (LEDInfo *) ClearCommonInfo(&info->leds->defs);
    /* 3/30/94 (ef) -- XXX! Should free action info here */
    ClearVModInfo(&info->vmods, xkb);
    return;
}

static SymInterpInfo *
NextInterp(CompatInfo * info)
{
    SymInterpInfo *si;

    si = calloc(1, sizeof(SymInterpInfo));
    if (si)
    {
        info->interps =
            (SymInterpInfo *) AddCommonInfo(&info->interps->defs,
                                            (CommonInfo *) si);
        info->nInterps++;
    }
    return si;
}

static SymInterpInfo *
FindMatchingInterp(CompatInfo *info, const SymInterpInfo *new)
{
    SymInterpInfo *old;

    for (old = info->interps; old != NULL;
         old = (SymInterpInfo *) old->defs.next)
    {
        if ((old->interp.sym == new->interp.sym) &&
            (old->interp.mods == new->interp.mods) &&
            (old->interp.match == new->interp.match))
        {
            return old;
        }
    }
    return NULL;
}

static Bool
AddInterp(CompatInfo * info, SymInterpInfo * new)
{
    SymInterpInfo *old;

    old = FindMatchingInterp(info, new);
    if (old != NULL)
    {
        unsigned collide = 0;

        if (new->defs.merge == MergeReplace)
        {
            SymInterpInfo *next = (SymInterpInfo *) old->defs.next;
            if (((old->defs.fileID == new->defs.fileID)
                 && (warningLevel > 0)) || (warningLevel > 9))
            {
                WARN("Multiple definitions for \"%s\"\n", siText(new, info));
                ACTION("Earlier interpretation ignored\n");
            }
            *old = *new;
            old->defs.next = &next->defs;
            return True;
        }
        if (UseNewField(_SI_VirtualMod, &old->defs, &new->defs, &collide))
        {
            old->interp.virtual_mod = new->interp.virtual_mod;
            old->defs.defined |= _SI_VirtualMod;
        }
        if (UseNewField(_SI_Action, &old->defs, &new->defs, &collide))
        {
            old->interp.act = new->interp.act;
            old->defs.defined |= _SI_Action;
        }
        if (UseNewField(_SI_AutoRepeat, &old->defs, &new->defs, &collide))
        {
            old->interp.flags &= ~XkbSI_AutoRepeat;
            old->interp.flags |= (new->interp.flags & XkbSI_AutoRepeat);
            old->defs.defined |= _SI_AutoRepeat;
        }
        if (UseNewField(_SI_LockingKey, &old->defs, &new->defs, &collide))
        {
            old->interp.flags &= ~XkbSI_LockingKey;
            old->interp.flags |= (new->interp.flags & XkbSI_LockingKey);
            old->defs.defined |= _SI_LockingKey;
        }
        if (UseNewField(_SI_LevelOneOnly, &old->defs, &new->defs, &collide))
        {
            old->interp.match &= ~XkbSI_LevelOneOnly;
            old->interp.match |= (new->interp.match & XkbSI_LevelOneOnly);
            old->defs.defined |= _SI_LevelOneOnly;
        }
        if (collide && (warningLevel > 0))
        {
            WARN("Multiple interpretations of \"%s\"\n", siText(new, info));
            ACTION("Using %s definition for duplicate fields\n",
                    (new->defs.merge != MergeAugment ? "last" : "first"));
        }
        return True;
    }
    old = new;
    if ((new = NextInterp(info)) == NULL)
        return False;
    *new = *old;
    new->defs.next = NULL;
    return True;
}

static Bool
AddGroupCompat(CompatInfo *info, unsigned group, const GroupCompatInfo *newGC)
{
    GroupCompatInfo *gc;
    unsigned merge;

    merge = newGC->merge;
    gc = &info->groupCompat[group];
    if (((gc->real_mods == newGC->real_mods) && (gc->vmods == newGC->vmods)))
    {
        return True;
    }
    if (((gc->defined && gc->fileID == newGC->fileID) && (warningLevel > 0))
        || (warningLevel > 9))
    {
        WARN("Compat map for group %d redefined\n", group + 1);
        ACTION("Using %s definition\n",
                (merge == MergeAugment ? "old" : "new"));
    }
    if(newGC->defined && (merge != MergeAugment || !gc->defined))
	*gc = *newGC;
    return True;
}

/***====================================================================***/

static Bool
ResolveStateAndPredicate(const ExprDef *expr,
                         unsigned *pred_rtrn, unsigned *mods_rtrn,
                         const CompatInfo *info)
{
    ExprResult result;

    if (expr == NULL)
    {
        *pred_rtrn = XkbSI_AnyOfOrNone;
        *mods_rtrn = ~0;
        return True;
    }

    *pred_rtrn = XkbSI_Exactly;
    if (expr->op == ExprActionDecl)
    {
        char *pred_txt =
            XkbAtomText(NULL, expr->value.action.name, XkbMessage);
        if (uStrCaseCmp(pred_txt, "noneof") == 0)
            *pred_rtrn = XkbSI_NoneOf;
        else if (uStrCaseCmp(pred_txt, "anyofornone") == 0)
            *pred_rtrn = XkbSI_AnyOfOrNone;
        else if (uStrCaseCmp(pred_txt, "anyof") == 0)
            *pred_rtrn = XkbSI_AnyOf;
        else if (uStrCaseCmp(pred_txt, "allof") == 0)
            *pred_rtrn = XkbSI_AllOf;
        else if (uStrCaseCmp(pred_txt, "exactly") == 0)
            *pred_rtrn = XkbSI_Exactly;
        else
        {
            ERROR("Illegal modifier predicate \"%s\"\n", pred_txt);
            ACTION("Ignored\n");
            return False;
        }
        expr = expr->value.action.args;
    }
    else if (expr->op == ExprIdent)
    {
        char *pred_txt = XkbAtomText(NULL, expr->value.str, XkbMessage);
        if ((pred_txt) && (uStrCaseCmp(pred_txt, "any") == 0))
        {
            *pred_rtrn = XkbSI_AnyOf;
            *mods_rtrn = 0xff;
            return True;
        }
    }

    if (ExprResolveModMask(expr, &result, NULL, NULL))
    {
        *mods_rtrn = result.uval;
        return True;
    }
    return False;
}

/***====================================================================***/

static void
MergeIncludedCompatMaps(CompatInfo * into, CompatInfo * from, unsigned merge)
{
    LEDInfo *next;
    GroupCompatInfo *gcm;
    int i;

    if (from->errorCount > 0)
    {
        into->errorCount += from->errorCount;
        return;
    }
    if (into->name == NULL)
    {
        into->name = from->name;
        from->name = NULL;
    }
    for (SymInterpInfo *si = from->interps; si;
         si = (SymInterpInfo *) si->defs.next)
    {
        if (merge != MergeDefault)
            si->defs.merge = merge;
        if (!AddInterp(into, si))
            into->errorCount++;
    }
    for (i = 0, gcm = &from->groupCompat[0]; i < XkbNumKbdGroups; i++, gcm++)
    {
        if (merge != MergeDefault)
            gcm->merge = merge;
        if (!AddGroupCompat(into, i, gcm))
            into->errorCount++;
    }
    for (LEDInfo *led = from->leds; led != NULL; led = next)
    {
        LEDInfo *rtrn;

        next = (LEDInfo *) led->defs.next;
        if (merge != MergeDefault)
            led->defs.merge = merge;
        rtrn = AddIndicatorMap(into->leds, led);
        if (rtrn != NULL)
            into->leds = rtrn;
        else
            into->errorCount++;
    }
    return;
}

typedef void (*FileHandler) (const XkbFile * /* rtrn */ ,
                             XkbDescPtr /* xkb */ ,
                             unsigned /* merge */ ,
                             CompatInfo *       /* info */
    );

static Bool
HandleIncludeCompatMap(IncludeStmt *stmt,
                       XkbDescPtr xkb, CompatInfo * info, FileHandler hndlr)
{
    unsigned newMerge;
    XkbFile *rtrn;
    CompatInfo included;
    Bool haveSelf;

    haveSelf = False;
    if ((stmt->file == NULL) && (stmt->map == NULL))
    {
        haveSelf = True;
        included = *info;
        bzero(info, sizeof(CompatInfo));
    }
    else if (ProcessIncludeFile(stmt, XkmCompatMapIndex, &rtrn, &newMerge))
    {
        InitCompatInfo(&included, xkb);
        included.fileID = rtrn->id;
        included.dflt = info->dflt;
        included.dflt.defs.fileID = rtrn->id;
        included.dflt.defs.merge = newMerge;
        included.ledDflt.defs.fileID = rtrn->id;
        included.ledDflt.defs.merge = newMerge;
        included.act = info->act;
        (*hndlr) (rtrn, xkb, MergeOverride, &included);
        if (stmt->stmt != NULL)
        {
            free(included.name);
            included.name = stmt->stmt;
            stmt->stmt = NULL;
        }
    }
    else
    {
        info->errorCount += 10;
        return False;
    }
    if ((stmt->next != NULL) && (included.errorCount < 1))
    {
        IncludeStmt *next;
        unsigned op;
        CompatInfo next_incl;

        for (next = stmt->next; next != NULL; next = next->next)
        {
            if ((next->file == NULL) && (next->map == NULL))
            {
                haveSelf = True;
                MergeIncludedCompatMaps(&included, info, next->merge);
                ClearCompatInfo(info, xkb);
            }
            else if (ProcessIncludeFile(next, XkmCompatMapIndex, &rtrn, &op))
            {
                InitCompatInfo(&next_incl, xkb);
                next_incl.fileID = rtrn->id;
                next_incl.dflt = info->dflt;
                next_incl.dflt.defs.fileID = rtrn->id;
                next_incl.dflt.defs.merge = op;
                next_incl.ledDflt.defs.fileID = rtrn->id;
                next_incl.ledDflt.defs.merge = op;
                next_incl.act = info->act;
                (*hndlr) (rtrn, xkb, MergeOverride, &next_incl);
                MergeIncludedCompatMaps(&included, &next_incl, op);
                ClearCompatInfo(&next_incl, xkb);
            }
            else
            {
                info->errorCount += 10;
                return False;
            }
        }
    }
    if (haveSelf)
        *info = included;
    else
    {
        MergeIncludedCompatMaps(info, &included, newMerge);
        ClearCompatInfo(&included, xkb);
    }
    return (info->errorCount == 0);
}

static LookupEntry useModMapValues[] = {
    {"levelone", 1},
    {"level1", 1},
    {"anylevel", 0},
    {"any", 0},
    {NULL, 0}
};

static int
SetInterpField(SymInterpInfo *si, XkbDescPtr xkb, const char *field,
               const ExprDef *arrayNdx, const ExprDef *value,
               const CompatInfo *info)
{
    int ok = 1;
    ExprResult tmp;

    if (uStrCaseCmp(field, "action") == 0)
    {
        if (arrayNdx != NULL)
            return ReportSINotArray(si, field, info);
        ok = HandleActionDef(value, xkb, &si->interp.act, si->defs.merge,
                             info->act);
        if (ok)
            si->defs.defined |= _SI_Action;
    }
    else if ((uStrCaseCmp(field, "virtualmodifier") == 0) ||
             (uStrCaseCmp(field, "virtualmod") == 0))
    {
        if (arrayNdx != NULL)
            return ReportSINotArray(si, field, info);
        ok = ResolveVirtualModifier(value, &tmp, &info->vmods);
        if (ok)
        {
            si->interp.virtual_mod = tmp.uval;
            si->defs.defined |= _SI_VirtualMod;
        }
        else
            return ReportSIBadType(si, field, "virtual modifier", info);
    }
    else if (uStrCaseCmp(field, "repeat") == 0)
    {
        if (arrayNdx != NULL)
            return ReportSINotArray(si, field, info);
        ok = ExprResolveBoolean(value, &tmp, NULL, NULL);
        if (ok)
        {
            if (tmp.uval)
                si->interp.flags |= XkbSI_AutoRepeat;
            else
                si->interp.flags &= ~XkbSI_AutoRepeat;
            si->defs.defined |= _SI_AutoRepeat;
        }
        else
            return ReportSIBadType(si, field, "boolean", info);
    }
    else if (uStrCaseCmp(field, "locking") == 0)
    {
        if (arrayNdx != NULL)
            return ReportSINotArray(si, field, info);
        ok = ExprResolveBoolean(value, &tmp, NULL, NULL);
        if (ok)
        {
            if (tmp.uval)
                si->interp.flags |= XkbSI_LockingKey;
            else
                si->interp.flags &= ~XkbSI_LockingKey;
            si->defs.defined |= _SI_LockingKey;
        }
        else
            return ReportSIBadType(si, field, "boolean", info);
    }
    else if ((uStrCaseCmp(field, "usemodmap") == 0) ||
             (uStrCaseCmp(field, "usemodmapmods") == 0))
    {
        if (arrayNdx != NULL)
            return ReportSINotArray(si, field, info);
        ok = ExprResolveEnum(value, &tmp, useModMapValues);
        if (ok)
        {
            if (tmp.uval)
                si->interp.match |= XkbSI_LevelOneOnly;
            else
                si->interp.match &= ~XkbSI_LevelOneOnly;
            si->defs.defined |= _SI_LevelOneOnly;
        }
        else
            return ReportSIBadType(si, field, "level specification", info);
    }
    else
    {
        ok = ReportBadField("symbol interpretation", field, siText(si, info));
    }
    return ok;
}

LookupEntry groupNames[] = {
    {"group1", 0x01}
    ,
    {"group2", 0x02}
    ,
    {"group3", 0x04}
    ,
    {"group4", 0x08}
    ,
    {"group5", 0x10}
    ,
    {"group6", 0x20}
    ,
    {"group7", 0x40}
    ,
    {"group8", 0x80}
    ,
    {"none", 0x00}
    ,
    {"all", 0xff}
    ,
    {NULL, 0}
};

static int
HandleInterpVar(const VarDef *stmt, XkbDescPtr xkb, CompatInfo *info)
{
    ExprResult elem, field;
    ExprDef *ndx;

    if (ExprResolveLhs(stmt->name, &elem, &field, &ndx) == 0)
        return 0;               /* internal error, already reported */
    if (elem.str && (uStrCaseCmp(elem.str, "interpret") == 0))
        return SetInterpField(&info->dflt, xkb, field.str, ndx, stmt->value,
                              info);
    if (elem.str && (uStrCaseCmp(elem.str, "indicator") == 0))
    {
        return SetIndicatorMapField(&info->ledDflt, xkb, field.str, ndx,
                                    stmt->value);
    }
    return SetActionField(xkb, elem.str, field.str, ndx, stmt->value,
                          &info->act);
}

static int
HandleInterpBody(const VarDef *def, XkbDescPtr xkb, SymInterpInfo *si,
                 CompatInfo *info)
{
    int ok = 1;
    ExprResult tmp, field;
    ExprDef *arrayNdx;

    for (; def != NULL; def = (VarDef *) def->common.next)
    {
        if ((def->name) && (def->name->type == ExprFieldRef))
        {
            ok = HandleInterpVar(def, xkb, info);
            continue;
        }
        ok = ExprResolveLhs(def->name, &tmp, &field, &arrayNdx);
        if (ok)
            ok = SetInterpField(si, xkb, field.str, arrayNdx, def->value,
                                info);
    }
    return ok;
}

static int
HandleInterpDef(const InterpDef *def, XkbDescPtr xkb, unsigned merge,
                CompatInfo *info)
{
    unsigned pred, mods;
    SymInterpInfo si;

    if (!ResolveStateAndPredicate(def->match, &pred, &mods, info))
    {
        ERROR("Couldn't determine matching modifiers\n");
        ACTION("Symbol interpretation ignored\n");
        return True;
    }
    if (def->ignore)
    {
        ERROR("Couldn't lookup keysym\n");
        ACTION("Symbol interpretation ignored\n");
        return True;
    }

    if (def->merge != MergeDefault)
        merge = def->merge;

    si = info->dflt;
    si.defs.merge = merge;
    si.interp.sym = def->sym;
    si.interp.match = pred & XkbSI_OpMask;
    si.interp.mods = mods;
    if (!HandleInterpBody(def->def, xkb, &si, info))
    {
        info->errorCount++;
        return False;
    }

    if (!AddInterp(info, &si))
    {
        info->errorCount++;
        return False;
    }
    return True;
}

static int
HandleGroupCompatDef(const GroupCompatDef *def,
                     XkbDescPtr xkb, unsigned merge, CompatInfo *info)
{
    ExprResult val;
    GroupCompatInfo tmp;

    if (def->merge != MergeDefault)
        merge = def->merge;
    if (!XkbIsLegalGroup(def->group - 1))
    {
        ERROR("Keyboard group must be in the range 1..%d\n",
               XkbNumKbdGroups + 1);
        ACTION("Compatibility map for illegal group %d ignored\n",
                def->group);
        return False;
    }
    tmp.fileID = info->fileID;
    tmp.merge = merge;
    if (!ExprResolveModMask(def->def, &val, LookupVModMask, (XPointer) xkb))
    {
        ERROR("Expected a modifier mask in group compatibility definition\n");
        ACTION("Ignoring illegal compatibility map for group %d\n",
                def->group);
        return False;
    }
    tmp.real_mods = val.uval & 0xff;
    tmp.vmods = (val.uval >> 8) & 0xffff;
    tmp.defined = True;
    return AddGroupCompat(info, def->group - 1, &tmp);
}

static void
HandleCompatMapFile(const XkbFile *file,
                    XkbDescPtr xkb, unsigned merge, CompatInfo *info)
{
    ParseCommon *stmt;

    if (merge == MergeDefault)
        merge = MergeAugment;
    info->name = uStringDup(file->name);
    stmt = file->defs;
    while (stmt)
    {
        switch (stmt->stmtType)
        {
        case StmtInclude:
            if (!HandleIncludeCompatMap((IncludeStmt *) stmt, xkb, info,
                                        HandleCompatMapFile))
                info->errorCount++;
            break;
        case StmtInterpDef:
            if (!HandleInterpDef((InterpDef *) stmt, xkb, merge, info))
                info->errorCount++;
            break;
        case StmtGroupCompatDef:
            if (!HandleGroupCompatDef
                ((GroupCompatDef *) stmt, xkb, merge, info))
                info->errorCount++;
            break;
        case StmtIndicatorMapDef:
        {
            LEDInfo *rtrn;
            rtrn = HandleIndicatorMapDef((IndicatorMapDef *) stmt, xkb,
                                         &info->ledDflt, info->leds, merge);
            if (rtrn != NULL)
                info->leds = rtrn;
            else
                info->errorCount++;
        }
            break;
        case StmtVarDef:
            if (!HandleInterpVar((VarDef *) stmt, xkb, info))
                info->errorCount++;
            break;
        case StmtVModDef:
            if (!HandleVModDef((VModDef *) stmt, merge, &info->vmods))
                info->errorCount++;
            break;
        case StmtKeycodeDef:
            ERROR("Interpretation files may not include other types\n");
            ACTION("Ignoring definition of key name\n");
            info->errorCount++;
            break;
        default:
            WSGO("Unexpected statement type %d in HandleCompatMapFile\n",
                  stmt->stmtType);
            break;
        }
        stmt = stmt->next;
        if (info->errorCount > 10)
        {
#ifdef NOISY
            ERROR("Too many errors\n");
#endif
            ACTION("Abandoning compatibility map \"%s\"\n", file->topName);
            break;
        }
    }
    return;
}

static void
CopyInterps(const CompatInfo *info,
            XkbCompatMapPtr compat, Bool needSymbol, unsigned pred)
{
    for (SymInterpInfo *si = info->interps; si;
         si = (SymInterpInfo *) si->defs.next)
    {
        if (((si->interp.match & XkbSI_OpMask) != pred) ||
            (needSymbol && (si->interp.sym == NoSymbol)) ||
            ((!needSymbol) && (si->interp.sym != NoSymbol)))
            continue;
        if (compat->num_si >= compat->size_si)
        {
            WSGO("No room to merge symbol interpretations\n");
            ACTION("Symbol interpretations lost\n");
            return;
        }
        compat->sym_interpret[compat->num_si++] = si->interp;
    }
    return;
}

Bool
CompileCompatMap(const XkbFile *file,
                 XkbFileInfo *result, unsigned merge, LEDInfo **unboundLEDs)
{
    CompatInfo info;
    XkbDescPtr xkb;

    xkb = result->xkb;
    InitCompatInfo(&info, xkb);
    info.dflt.defs.merge = merge;
    info.ledDflt.defs.merge = merge;
    HandleCompatMapFile(file, xkb, merge, &info);

    if (info.errorCount == 0)
    {
        int size, i;
        GroupCompatInfo *gcm;

        if (XkbAllocCompatMap(xkb, XkbAllCompatMask, info.nInterps) !=
            Success)
        {
            WSGO("Couldn't allocate compatibility map\n");
            ACTION("Exiting\n");
            return False;
        }
        if (info.name != NULL)
        {
            if (XkbAllocNames(xkb, XkbCompatNameMask, 0, 0) == Success)
                xkb->names->compat =
                    XkbInternAtom(xkb->dpy, info.name, False);
            else
            {
                WSGO("Couldn't allocate space for compat name\n");
                ACTION("Name \"%s\" (from %s) NOT assigned\n",
                        scanFile, info.name);
            }
        }
        size = info.nInterps * sizeof(XkbSymInterpretRec);
        if (size > 0)
        {
            CopyInterps(&info, xkb->compat, True, XkbSI_Exactly);
            CopyInterps(&info, xkb->compat, True, XkbSI_AllOf | XkbSI_NoneOf);
            CopyInterps(&info, xkb->compat, True, XkbSI_AnyOf);
            CopyInterps(&info, xkb->compat, True, XkbSI_AnyOfOrNone);
            CopyInterps(&info, xkb->compat, False, XkbSI_Exactly);
            CopyInterps(&info, xkb->compat, False,
                        XkbSI_AllOf | XkbSI_NoneOf);
            CopyInterps(&info, xkb->compat, False, XkbSI_AnyOf);
            CopyInterps(&info, xkb->compat, False, XkbSI_AnyOfOrNone);
        }
        for (i = 0, gcm = &info.groupCompat[0]; i < XkbNumKbdGroups;
             i++, gcm++)
        {
            if ((gcm->fileID != 0) || (gcm->real_mods != 0)
                || (gcm->vmods != 0))
            {
                xkb->compat->groups[i].mask = gcm->real_mods;
                xkb->compat->groups[i].real_mods = gcm->real_mods;
                xkb->compat->groups[i].vmods = gcm->vmods;
            }
        }
        if (info.leds != NULL)
        {
            if (!CopyIndicatorMapDefs(result, info.leds, unboundLEDs))
                info.errorCount++;
            info.leds = NULL;
        }
        ClearCompatInfo(&info, xkb);
        return True;
    }
    free(info.interps);
    return False;
}