fcxml.c 38.9 KB
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/*
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 * $RCSId: xc/lib/fontconfig/src/fcxml.c,v 1.21 2002/08/22 18:53:22 keithp Exp $
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 *
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 * Copyright  2002 Keith Packard
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 *
 * 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, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD 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 <stdarg.h>
#include "fcint.h"
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#ifndef HAVE_XMLPARSE_H
#define HAVE_XMLPARSE_H 0
#endif
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#if HAVE_XMLPARSE_H
#include <xmlparse.h>
#else
#include <expat.h>
#endif
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FcTest *
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FcTestCreate (FcMatchKind   kind, 
	      FcQual	    qual,
	      const FcChar8 *field,
	      FcOp	    compare,
	      FcExpr	    *expr)
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{
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    FcTest	*test = (FcTest *) malloc (sizeof (FcTest));
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    if (test)
    {
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	FcMemAlloc (FC_MEM_TEST, sizeof (FcTest));
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	test->next = 0;
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	test->kind = kind;
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	test->qual = qual;
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	test->field = (char *) FcStrCopy (field);
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	test->op = compare;
	test->expr = expr;
    }
    return test;
}

void
FcTestDestroy (FcTest *test)
{
    if (test->next)
	FcTestDestroy (test->next);
    FcExprDestroy (test->expr);
    FcStrFree ((FcChar8 *) test->field);
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    FcMemFree (FC_MEM_TEST, sizeof (FcTest));
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    free (test);
}

FcExpr *
FcExprCreateInteger (int i)
{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpInteger;
	e->u.ival = i;
    }
    return e;
}

FcExpr *
FcExprCreateDouble (double d)
{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpDouble;
	e->u.dval = d;
    }
    return e;
}

FcExpr *
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FcExprCreateString (const FcChar8 *s)
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{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpString;
	e->u.sval = FcStrCopy (s);
    }
    return e;
}

FcExpr *
FcExprCreateMatrix (const FcMatrix *m)
{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpMatrix;
	e->u.mval = FcMatrixCopy (m);
    }
    return e;
}

FcExpr *
FcExprCreateBool (FcBool b)
{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpBool;
	e->u.bval = b;
    }
    return e;
}

FcExpr *
FcExprCreateNil (void)
{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpNil;
    }
    return e;
}

FcExpr *
FcExprCreateField (const char *field)
{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpField;
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	e->u.field = (char *) FcStrCopy ((FcChar8 *) field);
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    }
    return e;
}

FcExpr *
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FcExprCreateConst (const FcChar8 *constant)
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{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = FcOpConst;
	e->u.constant = FcStrCopy (constant);
    }
    return e;
}

FcExpr *
FcExprCreateOp (FcExpr *left, FcOp op, FcExpr *right)
{
    FcExpr *e = (FcExpr *) malloc (sizeof (FcExpr));

    if (e)
    {
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	FcMemAlloc (FC_MEM_EXPR, sizeof (FcExpr));
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	e->op = op;
	e->u.tree.left = left;
	e->u.tree.right = right;
    }
    return e;
}

void
FcExprDestroy (FcExpr *e)
{
    switch (e->op) {
    case FcOpInteger:
	break;
    case FcOpDouble:
	break;
    case FcOpString:
	FcStrFree (e->u.sval);
	break;
    case FcOpMatrix:
	FcMatrixFree (e->u.mval);
	break;
    case FcOpCharSet:
	FcCharSetDestroy (e->u.cval);
	break;
    case FcOpBool:
	break;
    case FcOpField:
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	FcStrFree ((FcChar8 *) e->u.field);
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	break;
    case FcOpConst:
	FcStrFree (e->u.constant);
	break;
    case FcOpAssign:
    case FcOpAssignReplace:
    case FcOpPrepend:
    case FcOpPrependFirst:
    case FcOpAppend:
    case FcOpAppendLast:
	break;
    case FcOpOr:
    case FcOpAnd:
    case FcOpEqual:
    case FcOpNotEqual:
    case FcOpLess:
    case FcOpLessEqual:
    case FcOpMore:
    case FcOpMoreEqual:
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    case FcOpContains:
    case FcOpNotContains:
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    case FcOpPlus:
    case FcOpMinus:
    case FcOpTimes:
    case FcOpDivide:
    case FcOpQuest:
    case FcOpComma:
	FcExprDestroy (e->u.tree.right);
	/* fall through */
    case FcOpNot:
	FcExprDestroy (e->u.tree.left);
	break;
    case FcOpNil:
    case FcOpInvalid:
	break;
    }
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    FcMemFree (FC_MEM_EXPR, sizeof (FcExpr));
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    free (e);
}

FcEdit *
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FcEditCreate (const char *field, FcOp op, FcExpr *expr, FcValueBinding binding)
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{
    FcEdit *e = (FcEdit *) malloc (sizeof (FcEdit));

    if (e)
    {
	e->next = 0;
	e->field = field;   /* already saved in grammar */
	e->op = op;
	e->expr = expr;
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	e->binding = binding;
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    }
    return e;
}

void
FcEditDestroy (FcEdit *e)
{
    if (e->next)
	FcEditDestroy (e->next);
    FcStrFree ((FcChar8 *) e->field);
    if (e->expr)
	FcExprDestroy (e->expr);
}

char *
FcConfigSaveField (const char *field)
{
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    return (char *) FcStrCopy ((FcChar8 *) field);
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}

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typedef enum _FcElement {
    FcElementNone,
    FcElementFontconfig,
    FcElementDir,
    FcElementCache,
    FcElementInclude,
    FcElementConfig,
    FcElementMatch,
    FcElementAlias,
	
    FcElementBlank,
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    FcElementRescan,
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    FcElementPrefer,
    FcElementAccept,
    FcElementDefault,
    FcElementFamily,

    FcElementTest,
    FcElementEdit,
    FcElementInt,
    FcElementDouble,
    FcElementString,
    FcElementMatrix,
    FcElementBool,
    FcElementCharset,
    FcElementName,
    FcElementConst,
    FcElementOr,
    FcElementAnd,
    FcElementEq,
    FcElementNotEq,
    FcElementLess,
    FcElementLessEq,
    FcElementMore,
    FcElementMoreEq,
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    FcElementContains,
    FcElementNotContains,
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    FcElementPlus,
    FcElementMinus,
    FcElementTimes,
    FcElementDivide,
    FcElementNot,
    FcElementIf,
    FcElementUnknown
} FcElement;

static FcElement
FcElementMap (const XML_Char *name)
{
    static struct {
	char	    *name;
	FcElement   element;
    } fcElementMap[] = {
	{ "fontconfig",	FcElementFontconfig },
	{ "dir",	FcElementDir },
	{ "cache",	FcElementCache },
	{ "include",	FcElementInclude },
	{ "config",	FcElementConfig },
	{ "match",	FcElementMatch },
	{ "alias",	FcElementAlias },
	
	{ "blank",	FcElementBlank },
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	{ "rescan",	FcElementRescan },
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	{ "prefer",	FcElementPrefer },
	{ "accept",	FcElementAccept },
	{ "default",	FcElementDefault },
	{ "family",	FcElementFamily },

	{ "test",	FcElementTest },
	{ "edit",	FcElementEdit },
	{ "int",	FcElementInt },
	{ "double",	FcElementDouble },
	{ "string",	FcElementString },
	{ "matrix",	FcElementMatrix },
	{ "bool",	FcElementBool },
	{ "charset",	FcElementCharset },
	{ "name",	FcElementName },
	{ "const",	FcElementConst },
	{ "or",		FcElementOr },
	{ "and",	FcElementAnd },
	{ "eq",		FcElementEq },
	{ "not_eq",	FcElementNotEq },
	{ "less",	FcElementLess },
	{ "less_eq",	FcElementLessEq },
	{ "more",	FcElementMore },
	{ "more_eq",	FcElementMoreEq },
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	{ "contains",	FcElementContains },
	{ "not_contains",FcElementNotContains },
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	{ "plus",	FcElementPlus },
	{ "minus",	FcElementMinus },
	{ "times",	FcElementTimes },
	{ "divide",	FcElementDivide },
	{ "not",	FcElementNot },
	{ "if",		FcElementIf },
	
	{ 0,		0 }
    };

    int	    i;
    for (i = 0; fcElementMap[i].name; i++)
	if (!strcmp ((char *) name, fcElementMap[i].name))
	    return fcElementMap[i].element;
    return FcElementUnknown;
}

typedef struct _FcPStack {
    struct _FcPStack   *prev;
    FcElement		element;
    FcChar8		**attr;
    FcStrBuf		str;
} FcPStack;
    
typedef enum _FcVStackTag {
    FcVStackNone,

    FcVStackString,
    FcVStackFamily,
    FcVStackField,
    FcVStackConstant,
    
    FcVStackPrefer,
    FcVStackAccept,
    FcVStackDefault,
    
    FcVStackInteger,
    FcVStackDouble,
    FcVStackMatrix,
    FcVStackBool,
    
    FcVStackTest,
    FcVStackExpr,
    FcVStackEdit
} FcVStackTag;

typedef struct _FcVStack {
    struct _FcVStack	*prev;
    FcPStack		*pstack;	/* related parse element */
    FcVStackTag		tag;
    union {
	FcChar8		*string;

	int		integer;
	double		_double;
	FcMatrix	*matrix;
	FcBool		bool;

	FcTest		*test;
	FcQual		qual;
	FcOp		op;
	FcExpr		*expr;
	FcEdit		*edit;
    } u;
} FcVStack;

typedef struct _FcConfigParse {
    FcPStack	    *pstack;
    FcVStack	    *vstack;
    FcBool	    error;
    const FcChar8   *name;
    FcConfig	    *config;
    XML_Parser	    parser;
} FcConfigParse;

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typedef enum _FcConfigSeverity {
    FcSevereInfo, FcSevereWarning, FcSevereError
} FcConfigSeverity;

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static void
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FcConfigMessage (FcConfigParse *parse, FcConfigSeverity severe, char *fmt, ...)
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{
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    char	*s = "unknown";
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    va_list	args;

    va_start (args, fmt);
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    switch (severe) {
    case FcSevereInfo: s = "info"; break;
    case FcSevereWarning: s = "warning"; break;
    case FcSevereError: s = "error"; break;
    }
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    if (parse)
    {
	if (parse->name)
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	    fprintf (stderr, "Fontconfig %s: \"%s\", line %d: ", s,
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		     parse->name, XML_GetCurrentLineNumber (parse->parser));
	else
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	    fprintf (stderr, "Fontconfig %s: line %d: ", s,
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		     XML_GetCurrentLineNumber (parse->parser));
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	if (severe >= FcSevereError)
	    parse->error = FcTrue;
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    }
    else
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	fprintf (stderr, "Fontconfig %s: ", s);
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    vfprintf (stderr, fmt, args);
    fprintf (stderr, "\n");
    va_end (args);
}

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static void
FcVStackPush (FcConfigParse *parse, FcVStack *vstack)
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{
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    vstack->prev = parse->vstack;
    vstack->pstack = parse->pstack ? parse->pstack->prev : 0;
    parse->vstack = vstack;
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}

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static FcVStack *
FcVStackCreate (void)
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{
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    FcVStack    *new;
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    new = malloc (sizeof (FcVStack));
    if (!new)
	return 0;
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    FcMemAlloc (FC_MEM_VSTACK, sizeof (FcVStack));
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    new->tag = FcVStackNone;
    new->prev = 0;
    return new;
}
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static void
FcVStackDestroy (FcVStack *vstack)
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{
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    FcVStack    *prev;
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    for (; vstack; vstack = prev)
    {
	prev = vstack->prev;
	switch (vstack->tag) {
	case FcVStackNone:
	    break;
	case FcVStackString:
	case FcVStackFamily:
	case FcVStackField:
	case FcVStackConstant:
	    FcStrFree (vstack->u.string);
	    break;
	case FcVStackInteger:
	case FcVStackDouble:
	    break;
	case FcVStackMatrix:
	    FcMatrixFree (vstack->u.matrix);
	    break;
	case FcVStackBool:
	    break;
	case FcVStackTest:
	    FcTestDestroy (vstack->u.test);
	    break;
	case FcVStackExpr:
	case FcVStackPrefer:
	case FcVStackAccept:
	case FcVStackDefault:
	    FcExprDestroy (vstack->u.expr);
	    break;
	case FcVStackEdit:
	    FcEditDestroy (vstack->u.edit);
	    break;
	}
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	FcMemFree (FC_MEM_VSTACK, sizeof (FcVStack));
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	free (vstack);
    }
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}

static FcBool
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FcVStackPushString (FcConfigParse *parse, FcVStackTag tag, FcChar8 *string)
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{
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    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
	return FcFalse;
    vstack->u.string = string;
    vstack->tag = tag;
    FcVStackPush (parse, vstack);
    return FcTrue;
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}

static FcBool
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FcVStackPushInteger (FcConfigParse *parse, int integer)
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{
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    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
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	return FcFalse;
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    vstack->u.integer = integer;
    vstack->tag = FcVStackInteger;
    FcVStackPush (parse, vstack);
    return FcTrue;
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}

static FcBool
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FcVStackPushDouble (FcConfigParse *parse, double _double)
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{
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    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
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	return FcFalse;
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    vstack->u._double = _double;
    vstack->tag = FcVStackDouble;
    FcVStackPush (parse, vstack);
    return FcTrue;
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}

static FcBool
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FcVStackPushMatrix (FcConfigParse *parse, FcMatrix *matrix)
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{
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    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
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	return FcFalse;
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    matrix = FcMatrixCopy (matrix);
    if (!matrix)
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    {
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	FcVStackDestroy (vstack);
	return FcFalse;
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    }
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    vstack->u.matrix = matrix;
    vstack->tag = FcVStackMatrix;
    FcVStackPush (parse, vstack);
    return FcTrue;
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}

static FcBool
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FcVStackPushBool (FcConfigParse *parse, FcBool bool)
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{
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    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
	return FcFalse;
    vstack->u.bool = bool;
    vstack->tag = FcVStackBool;
    FcVStackPush (parse, vstack);
    return FcTrue;
}
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static FcBool
FcVStackPushTest (FcConfigParse *parse, FcTest *test)
{
    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
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	return FcFalse;
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    vstack->u.test = test;
    vstack->tag = FcVStackTest;
    FcVStackPush (parse, vstack);
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    return FcTrue;
}

static FcBool
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FcVStackPushExpr (FcConfigParse *parse, FcVStackTag tag, FcExpr *expr)
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{
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    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
	return FcFalse;
    vstack->u.expr = expr;
    vstack->tag = tag;
    FcVStackPush (parse, vstack);
    return FcTrue;
}
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static FcBool
FcVStackPushEdit (FcConfigParse *parse, FcEdit *edit)
{
    FcVStack    *vstack = FcVStackCreate ();
    if (!vstack)
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	return FcFalse;
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    vstack->u.edit = edit;
    vstack->tag = FcVStackEdit;
    FcVStackPush (parse, vstack);
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    return FcTrue;
}

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static FcVStack *
FcVStackFetch (FcConfigParse *parse, int off)
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{
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    FcVStack    *vstack;
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    for (vstack = parse->vstack; vstack && off-- > 0; vstack = vstack->prev);
    return vstack;
}

static void
FcVStackClear (FcConfigParse *parse)
{
    while (parse->vstack && parse->vstack->pstack == parse->pstack)
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    {
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	FcVStack    *vstack = parse->vstack;
	parse->vstack = vstack->prev;
	vstack->prev = 0;
	FcVStackDestroy (vstack);
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    }
}

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static FcVStack *
FcVStackPop (FcConfigParse *parse)
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{
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    FcVStack	*vstack = parse->vstack;
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    if (!vstack || vstack->pstack != parse->pstack)
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	return 0;
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    parse->vstack = vstack->prev;
    vstack->prev = 0;
    return vstack;
}

static int
FcVStackElements (FcConfigParse *parse)
{
    int		h = 0;
    FcVStack	*vstack = parse->vstack;
    while (vstack && vstack->pstack == parse->pstack)
    {
	h++;
	vstack = vstack->prev;
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    }
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    return h;
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}

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static FcChar8 **
FcConfigSaveAttr (const XML_Char **attr)
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{
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    int		n;
    int		slen;
    int		i;
    FcChar8	**new;
    FcChar8	*s;
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    if (!attr)
	return 0;
    slen = 0;
    for (i = 0; attr[i]; i++)
	slen += strlen (attr[i]) + 1;
    n = i;
    new = malloc ((i + 1) * sizeof (FcChar8 *) + slen);
    if (!new)
	return 0;
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    FcMemAlloc (FC_MEM_ATTR, 1);    /* size is too expensive */
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    s = (FcChar8 *) (new + (i + 1));
    for (i = 0; attr[i]; i++)
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    {
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	new[i] = s;
	strcpy ((char *) s, (char *) attr[i]);
	s += strlen ((char *) s) + 1;
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    }
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    new[i] = 0;
    return new;
}
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static FcBool
FcPStackPush (FcConfigParse *parse, FcElement element, const XML_Char **attr)
{
    FcPStack   *new = malloc (sizeof (FcPStack));

    if (!new)
	return FcFalse;
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    FcMemAlloc (FC_MEM_PSTACK, sizeof (FcPStack));
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    new->prev = parse->pstack;
    new->element = element;
    if (attr)
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    {
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	new->attr = FcConfigSaveAttr (attr);
	if (!new->attr)
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	    FcConfigMessage (parse, FcSevereError, "out of memory");
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    }
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    else
	new->attr = 0;
    FcStrBufInit (&new->str, 0, 0);
    parse->pstack = new;
    return FcTrue;
}
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static FcBool
FcPStackPop (FcConfigParse *parse)
{
    FcPStack   *old;
    
    if (!parse->pstack) 
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    {
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	FcConfigMessage (parse, FcSevereError, "mismatching element");
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	return FcFalse;
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    }
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    FcVStackClear (parse);
    old = parse->pstack;
    parse->pstack = old->prev;
    FcStrBufDestroy (&old->str);
    if (old->attr)
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    {
	FcMemFree (FC_MEM_ATTR, 1); /* size is to expensive */
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	free (old->attr);
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    }
    FcMemFree (FC_MEM_PSTACK, sizeof (FcPStack));
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    free (old);
    return FcTrue;
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}

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static FcBool
FcConfigInit (FcConfigParse *parse, const FcChar8 *name, FcConfig *config, XML_Parser parser)
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{
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    parse->pstack = 0;
    parse->vstack = 0;
    parse->error = FcFalse;
    parse->name = name;
    parse->config = config;
    parse->parser = parser;
    return FcTrue;
}

static void
FcConfigCleanup (FcConfigParse	*parse)
{
    while (parse->pstack)
	FcPStackPop (parse);
}

static const FcChar8 *
FcConfigGetAttribute (FcConfigParse *parse, char *attr)
{
    FcChar8 **attrs;
    if (!parse->pstack)
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	return 0;

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    attrs = parse->pstack->attr;
    while (*attrs)
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    {
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	if (!strcmp ((char *) *attrs, attr))
	    return attrs[1];
	attrs += 2;
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    }
    return 0;
}

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static void
FcStartElement(void *userData, const XML_Char *name, const XML_Char **attr)
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{
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    FcConfigParse   *parse = userData;
    FcElement	    element;
    
    element = FcElementMap (name);
    if (element == FcElementUnknown)
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	FcConfigMessage (parse, FcSevereWarning, "unknown element \"%s\"", name);
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    if (!FcPStackPush (parse, element, attr))
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    {
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	FcConfigMessage (parse, FcSevereError, "out of memory");
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	return;
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    }
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    return;
}
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static void
FcParseBlank (FcConfigParse *parse)
{
    int	    n = FcVStackElements (parse);
    while (n-- > 0)
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    {
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	FcVStack    *v = FcVStackFetch (parse, n);
	if (v->tag != FcVStackInteger)
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	    FcConfigMessage (parse, FcSevereError, "non-integer blank");
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	else
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	{
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	    if (!parse->config->blanks)
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	    {
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		parse->config->blanks = FcBlanksCreate ();
		if (!parse->config->blanks)
		{
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		    FcConfigMessage (parse, FcSevereError, "out of memory");
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		    break;
		}
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	    }
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	    if (!FcBlanksAdd (parse->config->blanks, v->u.integer))
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	    {
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		FcConfigMessage (parse, FcSevereError, "out of memory");
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		break;
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	    }
	}
    }
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}
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static void
FcParseRescan (FcConfigParse *parse)
{
    int	    n = FcVStackElements (parse);
    while (n-- > 0)
    {
	FcVStack    *v = FcVStackFetch (parse, n);
	if (v->tag != FcVStackInteger)
	    FcConfigMessage (parse, FcSevereWarning, "non-integer rescan");
	else
	    parse->config->rescanInterval = v->u.integer;
    }
}

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static void
FcParseInt (FcConfigParse *parse)
{
    FcChar8 *s, *end;
    int	    l;
    
    if (!parse->pstack)
	return;
    s = FcStrBufDone (&parse->pstack->str);
    if (!s)
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    {
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	FcConfigMessage (parse, FcSevereError, "out of memory");
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	return;
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    }
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    end = 0;
    l = (int) strtol ((char *) s, (char **)&end, 0);
    if (end != s + strlen ((char *) s))
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	FcConfigMessage (parse, FcSevereError, "\"%s\": not a valid integer", s);
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    else
	FcVStackPushInteger (parse, l);
    FcStrFree (s);
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}

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/*
 * idea copied from glib g_ascii_strtod with 
 * permission of the author (Alexander Larsson) 
 */

#include <locale.h>

static double 
FcStrtod (char *s, char **end)
{
    struct lconv    *locale_data;
    char	    *dot;
    double	    v;

    /*
     * Have to swap the decimal point to match the current locale
     * if that locale doesn't use 0x2e
     */
    if ((dot = strchr (s, 0x2e)) &&
	(locale_data = localeconv ()) &&
	(locale_data->decimal_point[0] != 0x2e ||
	 locale_data->decimal_point[1] != 0))
    {
	char	buf[128];
	int	slen = strlen (s);
	int	dlen = strlen (locale_data->decimal_point);
	
	if (slen + dlen > sizeof (buf))
	{
	    if (end)
		*end = s;
	    v = 0;
	}
	else
	{
	    char	*buf_end;
	    /* mantissa */
	    strncpy (buf, s, dot - s);
	    /* decimal point */
	    strcpy (buf + (dot - s), locale_data->decimal_point);
	    /* rest of number */
	    strcpy (buf + (dot - s) + dlen, dot + 1);
	    buf_end = 0;
	    v = strtod (buf, &buf_end);
	    if (buf_end)
		buf_end = s + (buf_end - buf);
	    if (end)
		*end = buf_end;
	}
    }
    else
	v = strtod (s, end);
    return v;
}

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static void
FcParseDouble (FcConfigParse *parse)
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{
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    FcChar8 *s, *end;
    double  d;
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    if (!parse->pstack)
	return;
    s = FcStrBufDone (&parse->pstack->str);
    if (!s)
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    {
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	FcConfigMessage (parse, FcSevereError, "out of memory");
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	return;
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    }
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    end = 0;
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    d = FcStrtod ((char *) s, (char **)&end);
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    if (end != s + strlen ((char *) s))
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	FcConfigMessage (parse, FcSevereError, "\"%s\": not a valid double", s);
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    else
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	FcVStackPushDouble (parse, d);
    FcStrFree (s);
}
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static void
FcParseString (FcConfigParse *parse, FcVStackTag tag)
{
    FcChar8 *s;
    
    if (!parse->pstack)
	return;
    s = FcStrBufDone (&parse->pstack->str);
    if (!s)
    {
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	FcConfigMessage (parse, FcSevereError, "out of memory");
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	return;
    }
    if (!FcVStackPushString (parse, tag, s))
	FcStrFree (s);
}

static void
FcParseMatrix (FcConfigParse *parse)
{
    FcVStack	*vstack;
    enum { m_done, m_xx, m_xy, m_yx, m_yy } matrix_state = m_yy;
    FcMatrix	m;
    
    while ((vstack = FcVStackPop (parse)))
    {
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	double	v;
	switch (vstack->tag) {
	case FcVStackInteger:
	    v = vstack->u.integer;
	    break;
	case FcVStackDouble:
	    v = vstack->u._double;
	    break;
	default:
	    FcConfigMessage (parse, FcSevereError, "non-double matrix element");
	    v = 1.0;
	    break;
	}
	switch (matrix_state) {
	case m_xx: m.xx = v; break;
	case m_xy: m.xy = v; break;
	case m_yx: m.yx = v; break;
	case m_yy: m.yy = v; break;
	default: break;
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	}
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	FcVStackDestroy (vstack);
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	matrix_state--;
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    }
    if (matrix_state != m_done)
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	FcConfigMessage (parse, FcSevereError, "wrong number of matrix elements");
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    else
	FcVStackPushMatrix (parse, &m);
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}

static FcBool
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FcConfigLexBool (const FcChar8 *bool)
{
    if (*bool == 't' || *bool == 'T')
	return FcTrue;
    if (*bool == 'y' || *bool == 'Y')
	return FcTrue;
    if (*bool == '1')
	return FcTrue;
    return FcFalse;
}

static void
FcParseBool (FcConfigParse *parse)
{
    FcChar8 *s;

    if (!parse->pstack)
	return;
    s = FcStrBufDone (&parse->pstack->str);
    if (!s)
    {
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	FcConfigMessage (parse, FcSevereError, "out of memory");
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	return;
    }
    FcVStackPushBool (parse, FcConfigLexBool (s));
    FcStrFree (s);
}

static void
FcParseFamilies (FcConfigParse *parse, FcVStackTag tag)
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{
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    FcVStack	*vstack;
    FcExpr	*left, *expr = 0, *new;

    while ((vstack = FcVStackPop (parse)))
    {
	if (vstack->tag != FcVStackFamily)
	{
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	    FcConfigMessage (parse, FcSevereWarning, "non-family");
	    FcVStackDestroy (vstack);
	    continue;
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	}
	left = vstack->u.expr;
	vstack->tag = FcVStackNone;
	FcVStackDestroy (vstack);
	if (expr)
	{
	    new = FcExprCreateOp (left, FcOpComma, expr);
	    if (!new)
	    {
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		FcConfigMessage (parse, FcSevereError, "out of memory");
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		FcExprDestroy (left);
		FcExprDestroy (expr);
		break;
	    }
	    expr = new;
	}
	else
	    expr = left;
    }
    if (expr)
    {
	if (!FcVStackPushExpr (parse, tag, expr))
	{
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	    FcConfigMessage (parse, FcSevereError, "out of memory");
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	    if (expr)
		FcExprDestroy (expr);
	}
    }
}

static void
FcParseFamily (FcConfigParse *parse)
{
    FcChar8 *s;
    FcExpr  *expr;

    if (!parse->pstack)
	return;
    s = FcStrBufDone (&parse->pstack->str);
    if (!s)
    {
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	FcConfigMessage (parse, FcSevereError, "out of memory");
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	return;
    }
    expr = FcExprCreateString (s);
    FcStrFree (s);
    if (expr)
	FcVStackPushExpr (parse, FcVStackFamily, expr);
}

static void
FcParseAlias (FcConfigParse *parse)
{
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    FcExpr	*family = 0, *accept = 0, *prefer = 0, *def = 0, *new = 0;
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    FcEdit	*edit = 0, *next;
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    FcVStack	*vstack;
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    FcTest	*test;

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    while ((vstack = FcVStackPop (parse))) 
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    {
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	switch (vstack->tag) {
	case FcVStackFamily:
	    if (family)
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	    {
		new = FcExprCreateOp (vstack->u.expr, FcOpComma, family);
		if (!new)
		    FcConfigMessage (parse, FcSevereError, "out of memory");
		else
		    family = new;
	    }
	    else
		new = vstack->u.expr;
	    if (new)
	    {
		family = new;
		vstack->tag = FcVStackNone;
	    }
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	    break;
	case FcVStackPrefer:
	    if (prefer)
		FcExprDestroy (prefer);
	    prefer = vstack->u.expr;
	    vstack->tag = FcVStackNone;
	    break;
	case FcVStackAccept:
	    if (accept)
		FcExprDestroy (accept);
	    accept = vstack->u.expr;
	    vstack->tag = FcVStackNone;
	    break;
	case FcVStackDefault:
	    if (def)
		FcExprDestroy (def);
	    def = vstack->u.expr;
	    vstack->tag = FcVStackNone;
	    break;
	default:
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	    FcConfigMessage (parse, FcSevereWarning, "bad alias");
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	    break;
	}
	FcVStackDestroy (vstack);
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    }
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    if (!family)
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    {
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	FcConfigMessage (parse, FcSevereError, "missing family in alias");
	if (prefer)
	    FcExprDestroy (prefer);
	if (accept)
	    FcExprDestroy (accept);
	if (def)
	    FcExprDestroy (def);
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	return;
    }
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    if (prefer)
    {
	edit = FcEditCreate (FcConfigSaveField ("family"),
			     FcOpPrepend,
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			     prefer,
			     FcValueBindingWeak);
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	if (edit)
	    edit->next = 0;
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	else
	    FcExprDestroy (prefer);
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    }
    if (accept)
    {
	next = edit;
	edit = FcEditCreate (FcConfigSaveField ("family"),
			     FcOpAppend,
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			     accept,
			     FcValueBindingWeak);
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	if (edit)
	    edit->next = next;
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	else
	    FcExprDestroy (accept);
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    }
    if (def)
    {
	next = edit;
	edit = FcEditCreate (FcConfigSaveField ("family"),
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			     FcOpAppendLast,
			     def,
			     FcValueBindingWeak);
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	if (edit)
	    edit->next = next;
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	else
	    FcExprDestroy (def);
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    }
    if (edit)
    {
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	test = FcTestCreate (FcMatchPattern,
			     FcQualAny,
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			     (FcChar8 *) FC_FAMILY,
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			     FcOpEqual,
			     family);
	if (test)
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	    if (!FcConfigAddEdit (parse->config, test, edit, FcMatchPattern))
		FcTestDestroy (test);
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    }
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    else
	FcExprDestroy (family);
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}

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static FcExpr *
FcPopExpr (FcConfigParse *parse)
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{
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    FcVStack	*vstack = FcVStackPop (parse);
    FcExpr	*expr = 0;
    if (!vstack)
	return 0;
    switch (vstack->tag) {
    case FcVStackNone:
	break;
    case FcVStackString:
    case FcVStackFamily:
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	expr = FcExprCreateString (vstack->u.string);
	break;
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    case FcVStackField:
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	expr = FcExprCreateField ((char *) vstack->u.string);
	break;
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    case FcVStackConstant:
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	expr = FcExprCreateConst (vstack->u.string);
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	break;
    case FcVStackPrefer:
    case FcVStackAccept:
    case FcVStackDefault:
	expr = vstack->u.expr;
	vstack->tag = FcVStackNone;
	break;
    case FcVStackInteger:
	expr = FcExprCreateInteger (vstack->u.integer);
	break;
    case FcVStackDouble:
	expr = FcExprCreateDouble (vstack->u._double);
	break;
    case FcVStackMatrix:
	expr = FcExprCreateMatrix (vstack->u.matrix);
	break;
    case FcVStackBool:
	expr = FcExprCreateBool (vstack->u.bool);
	break;
    case FcVStackTest:
	break;
    case FcVStackExpr:
	expr = vstack->u.expr;
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	vstack->tag = FcVStackNone;
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	break;
    case FcVStackEdit:
	break;
    }
    FcVStackDestroy (vstack);
    return expr;
}

static FcExpr *
FcPopExprs (FcConfigParse *parse, FcOp op)
{
    FcExpr  *left, *expr = 0, *new;
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    while ((left = FcPopExpr (parse)))
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    {
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	if (expr)
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	{
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	    new = FcExprCreateOp (left, op, expr);
	    if (!new)
	    {
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		FcConfigMessage (parse, FcSevereError, "out of memory");
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		FcExprDestroy (left);
		FcExprDestroy (expr);
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		break;
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	    }
	    expr = new;
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	}
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	else
	    expr = left;
    }
    return expr;
}

static void
FcParseExpr (FcConfigParse *parse, FcOp op)
{
    FcExpr  *expr = FcPopExprs (parse, op);
    if (expr)
	FcVStackPushExpr (parse, FcVStackExpr, expr);
}

static void
FcParseInclude (FcConfigParse *parse)
{
    FcChar8	    *s;
    const FcChar8   *i;
    FcBool	    ignore_missing = FcFalse;
    
    s = FcStrBufDone (&parse->pstack->str);
    if (!s)
    {
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	FcConfigMessage (parse, FcSevereError, "out of memory");
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	return;
    }
    i = FcConfigGetAttribute (parse, "ignore_missing");
    if (i && FcConfigLexBool ((FcChar8 *) i) == FcTrue)
	ignore_missing = FcTrue;
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    if (!FcConfigParseAndLoad (parse->config, s, !ignore_missing))
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	parse->error = FcTrue;
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    FcStrFree (s);
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}

typedef struct _FcOpMap {
    char    *name;
    FcOp    op;
} FcOpMap;

static FcOp
FcConfigLexOp (const FcChar8 *op, const FcOpMap	*map, int nmap)
{
    int	i;

    for (i = 0; i < nmap; i++)
	if (!strcmp ((char *) op, map[i].name)) 
	    return map[i].op;
    return FcOpInvalid;
}

static const FcOpMap fcCompareOps[] = {
    { "eq",		FcOpEqual	    },
    { "not_eq",		FcOpNotEqual	    },
    { "less",		FcOpLess	    },
    { "less_eq",	FcOpLessEqual	    },
    { "more",		FcOpMore	    },
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    { "more_eq",	FcOpMoreEqual	    },
    { "contains",	FcOpContains	    },
    { "not_contains",	FcOpNotContains	    }
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};

#define NUM_COMPARE_OPS (sizeof fcCompareOps / sizeof fcCompareOps[0])

static FcOp
FcConfigLexCompare (const FcChar8 *compare)
{
    return FcConfigLexOp (compare, fcCompareOps, NUM_COMPARE_OPS);
}


static void
FcParseTest (FcConfigParse *parse)
{