Destroy the global cache file if it's terminally broken. (reported by Mike

[fontconfig.git] / src / fcint.h

/*
 * $RCSId: xc/lib/fontconfig/src/fcint.h,v 1.27 2002/08/31 22:17:32 keithp Exp $
 *
 * Copyright © 2000 Keith Packard
 *
 * 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.
 */

#ifndef _FCINT_H_
#define _FCINT_H_

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <fontconfig/fontconfig.h>
#include <fontconfig/fcprivate.h>
#include <fontconfig/fcfreetype.h>
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifndef FC_CONFIG_PATH
#define FC_CONFIG_PATH "fonts.conf"
#endif

#define FC_FONT_FILE_INVALID	((FcChar8 *) ".")
#define FC_FONT_FILE_DIR	((FcChar8 *) ".dir")

#ifdef _WIN32
#define FC_SEARCH_PATH_SEPARATOR ';'
#else
#define FC_SEARCH_PATH_SEPARATOR ':'
#endif

#define FC_DBG_MATCH	1
#define FC_DBG_MATCHV	2
#define FC_DBG_EDIT	4
#define FC_DBG_FONTSET	8
#define FC_DBG_CACHE	16
#define FC_DBG_CACHEV	32
#define FC_DBG_PARSE	64
#define FC_DBG_SCAN	128
#define FC_DBG_SCANV	256
#define FC_DBG_MEMORY	512
#define FC_DBG_CONFIG	1024

#define FC_MEM_CHARSET	    0
#define FC_MEM_CHARLEAF	    1
#define FC_MEM_FONTSET	    2
#define FC_MEM_FONTPTR	    3
#define FC_MEM_OBJECTSET    4
#define FC_MEM_OBJECTPTR    5
#define FC_MEM_MATRIX	    6
#define FC_MEM_PATTERN	    7
#define FC_MEM_PATELT	    8
#define FC_MEM_VALLIST	    9
#define FC_MEM_SUBSTATE	    10
#define FC_MEM_STRING	    11
#define FC_MEM_LISTBUCK	    12
#define FC_MEM_STRSET	    13
#define FC_MEM_STRLIST	    14
#define FC_MEM_CONFIG	    15
#define FC_MEM_LANGSET	    16
#define FC_MEM_ATOMIC	    17
#define FC_MEM_BLANKS	    18
#define FC_MEM_CACHE	    19
#define FC_MEM_STRBUF	    20
#define FC_MEM_SUBST	    21
#define FC_MEM_OBJECTTYPE   22
#define FC_MEM_CONSTANT	    23
#define FC_MEM_TEST	    24
#define FC_MEM_EXPR	    25
#define FC_MEM_VSTACK	    26
#define FC_MEM_ATTR	    27
#define FC_MEM_PSTACK	    28
#define FC_MEM_STATICSTR    29

#define FC_MEM_NUM	    30

typedef enum _FcValueBinding {
    FcValueBindingWeak, FcValueBindingStrong, FcValueBindingSame
} FcValueBinding;

typedef struct _FcValueListPtr {
    int		 	bank;
    union {
        int		    stat;
        struct _FcValueList *dyn;
    } u;
} FcValueListPtr;

typedef struct _FcValueList {
    FcValueListPtr	    next;

    FcValue		    value;
    FcValueBinding	    binding;
} FcValueList;

typedef int FcObjectPtr;

typedef struct _FcPatternEltPtr {
    int		 	bank;
    union {
        int		    stat;
        struct _FcPatternElt *dyn;
    } u;
} FcPatternEltPtr;

typedef struct _FcPatternElt {
    FcObjectPtr             object;
    FcValueListPtr          values;
} FcPatternElt;

struct _FcPattern {
    int		    num;
    int		    size;
    FcPatternEltPtr elts;
    int		    ref;
    int		    bank;
};

typedef enum _FcOp {
    FcOpInteger, FcOpDouble, FcOpString, FcOpMatrix, FcOpBool, FcOpCharSet, 
    FcOpNil,
    FcOpField, FcOpConst,
    FcOpAssign, FcOpAssignReplace, 
    FcOpPrependFirst, FcOpPrepend, FcOpAppend, FcOpAppendLast,
    FcOpQuest,
    FcOpOr, FcOpAnd, FcOpEqual, FcOpNotEqual, 
    FcOpContains, FcOpListing, FcOpNotContains,
    FcOpLess, FcOpLessEqual, FcOpMore, FcOpMoreEqual,
    FcOpPlus, FcOpMinus, FcOpTimes, FcOpDivide,
    FcOpNot, FcOpComma, FcOpFloor, FcOpCeil, FcOpRound, FcOpTrunc,
    FcOpInvalid
} FcOp;

typedef struct _FcExpr {
    FcOp   op;
    union {
	int	    ival;
	double	    dval;
	FcChar8	    *sval;
	FcMatrix    *mval;
	FcBool	    bval;
	FcCharSet   *cval;
	char	    *field;
	FcChar8	    *constant;
	struct {
	    struct _FcExpr *left, *right;
	} tree;
    } u;
} FcExpr;

typedef enum _FcQual {
    FcQualAny, FcQualAll, FcQualFirst, FcQualNotFirst
} FcQual;

#define FcMatchDefault	((FcMatchKind) -1)

typedef struct _FcTest {
    struct _FcTest	*next;
    FcMatchKind		kind;
    FcQual		qual;
    const char		*field;
    FcOp		op;
    FcExpr		*expr;
} FcTest;

typedef struct _FcEdit {
    struct _FcEdit *next;
    const char	    *field;
    FcOp	    op;
    FcExpr	    *expr;
    FcValueBinding  binding;
} FcEdit;

typedef struct _FcSubst {
    struct _FcSubst	*next;
    FcTest		*test;
    FcEdit		*edit;
} FcSubst;

typedef struct _FcCharLeaf {
    FcChar32	map[256/32];
} FcCharLeaf;

#define FC_REF_CONSTANT	    -1

struct _FcCharSet {
    int		    ref;	/* reference count */
    int		    num;	/* size of leaves and numbers arrays */
    int		    bank;
    union {
	struct {
	    FcCharLeaf  **leaves;
	    FcChar16    *numbers;
	} dyn;
	struct {
	    int	    	leafidx_offset;
	    int	      	numbers_offset;
	} stat;
    } u;
};

struct _FcStrSet {
    int		    ref;	/* reference count */
    int		    num;
    int		    size;
    FcChar8	    **strs;
};

struct _FcStrList {
    FcStrSet	    *set;
    int		    n;
};

typedef struct _FcStrBuf {
    FcChar8 *buf;
    FcBool  allocated;
    FcBool  failed;
    int	    len;
    int	    size;
} FcStrBuf;

typedef struct _FcCache {
    int	    magic;              /* 0xFC02FC02 */
    int	    count;              /* number of bytes of data in block */
    int     bank;               /* bank ID */
    int     pattern_count;      /* number of FcPatterns */
    int     patternelt_count;   /* number of FcPatternElts */
    int     valuelist_count;    /* number of FcValueLists */
    int     str_count;          /* size of strings appearing as FcValues */
    int	    langset_count;      /* number of FcLangSets */
    int     charset_count;      /* number of FcCharSets */
    int     charset_numbers_count; 
    int     charset_leaf_count;
    int     charset_leaf_idx_count;
} FcCache;

/*
 * To map adobe glyph names to unicode values, a precomputed hash
 * table is used
 */

typedef struct _FcGlyphName {
    FcChar32	ucs;		/* unicode value */
    FcChar8	name[1];	/* name extends beyond struct */
} FcGlyphName;

/*
 * To perform case-insensitive string comparisons, a table
 * is used which holds three different kinds of folding data.
 * 
 * The first is a range of upper case values mapping to a range
 * of their lower case equivalents.  Within each range, the offset
 * between upper and lower case is constant.
 *
 * The second is a range of upper case values which are interleaved
 * with their lower case equivalents.
 * 
 * The third is a set of raw unicode values mapping to a list
 * of unicode values for comparison purposes.  This allows conversion
 * of ß to "ss" so that SS, ss and ß all match.  A separate array
 * holds the list of unicode values for each entry.
 *
 * These are packed into a single table.  Using a binary search,
 * the appropriate entry can be located.
 */

#define FC_CASE_FOLD_RANGE	    0
#define FC_CASE_FOLD_EVEN_ODD	    1
#define FC_CASE_FOLD_FULL	    2

typedef struct _FcCaseFold {
    FcChar32	upper;
    FcChar16	method : 2;
    FcChar16	count : 14;
    short    	offset;	    /* lower - upper for RANGE, table id for FULL */
} FcCaseFold;

#define FC_MAX_FILE_LEN	    4096

#define FC_STORAGE_STATIC 0x80
#define fc_value_string(v)  (((v)->type & FC_STORAGE_STATIC) ? ((FcChar8 *) v) + (v)->u.s_off : (v) -> u.s)
#define fc_value_charset(v)  (((v)->type & FC_STORAGE_STATIC) ? (const FcCharSet *)(((char *) v) + (v)->u.c_off) : (v) -> u.c)
#define fc_value_langset(v)  (((v)->type & FC_STORAGE_STATIC) ? (const FcLangSet *)(((char *) v) + (v)->u.l_off) : (v) -> u.l)

/*
 * The per-user ~/.fonts.cache-<version> file is loaded into
 * this data structure.  Each directory gets a substructure
 * which is validated by comparing the directory timestamp with
 * that saved in the cache.  When valid, the entire directory cache
 * can be immediately loaded without reading the directory.  Otherwise,
 * the files are checked individually; updated files are loaded into the
 * cache which is then rewritten to the users home directory
 */

#define FC_CACHE_MAGIC 0xFC02FC02

typedef struct _FcGlobalCacheDir FcGlobalCacheDir;

struct _FcGlobalCacheDir {
    struct _FcGlobalCacheDir	*next;
    char			*name;
    FcCache			metadata;
    off_t			offset;
    void			*ent;
};

typedef struct _FcGlobalCache {
    FcGlobalCacheDir		*dirs;
    FcBool			updated;
    int				fd;
} FcGlobalCache;

struct _FcAtomic {
    FcChar8	*file;		/* original file name */
    FcChar8	*new;		/* temp file name -- write data here */
    FcChar8	*lck;		/* lockfile name (used for locking) */
    FcChar8	*tmp;		/* tmpfile name (used for locking) */
};

struct _FcBlanks {
    int		nblank;
    int		sblank;
    FcChar32	*blanks;
};

struct _FcConfig {
    /*
     * File names loaded from the configuration -- saved here as the
     * cache file must be consulted before the directories are scanned,
     * and those directives may occur in any order
     */
    FcStrSet	*configDirs;	    /* directories to scan for fonts */
    FcChar8	*cache;		    /* name of per-user cache file */
    /*
     * Set of allowed blank chars -- used to
     * trim fonts of bogus glyphs
     */
    FcBlanks	*blanks;
    /*
     * List of directories containing fonts,
     * built by recursively scanning the set 
     * of configured directories
     */
    FcStrSet	*fontDirs;
    /*
     * Names of all of the configuration files used
     * to create this configuration
     */
    FcStrSet	*configFiles;	    /* config files loaded */
    /*
     * Substitution instructions for patterns and fonts;
     * maxObjects is used to allocate appropriate intermediate storage
     * while performing a whole set of substitutions
     */
    FcSubst	*substPattern;	    /* substitutions for patterns */
    FcSubst	*substFont;	    /* substitutions for fonts */
    int		maxObjects;	    /* maximum number of tests in all substs */
    /*
     * List of patterns used to control font file selection
     */
    FcStrSet	*acceptGlobs;
    FcStrSet	*rejectGlobs;
    FcFontSet	*acceptPatterns;
    FcFontSet	*rejectPatterns;
    /*
     * The set of fonts loaded from the listed directories; the
     * order within the set does not determine the font selection,
     * except in the case of identical matches in which case earlier fonts
     * match preferrentially
     */
    FcFontSet	*fonts[FcSetApplication + 1];
    /*
     * Fontconfig can periodically rescan the system configuration
     * and font directories.  This rescanning occurs when font
     * listing requests are made, but no more often than rescanInterval
     * seconds apart.
     */
    time_t	rescanTime;	    /* last time information was scanned */
    int		rescanInterval;	    /* interval between scans */
};
 
extern FcConfig	*_fcConfig;

typedef struct _FcCharMap FcCharMap;

/* fcblanks.c */

/* fccache.c */

FcGlobalCache *
FcGlobalCacheCreate (void);

void
FcGlobalCacheDestroy (FcGlobalCache *cache);

FcBool
FcGlobalCacheReadDir (FcFontSet     *set, 
		      FcStrSet 	    *dirs, 
		      FcGlobalCache *cache, 
		      const char    *dir, 
		      FcConfig 	    *config);

void
FcGlobalCacheLoad (FcGlobalCache    *cache,
                   FcStrSet	    *staleDirs,
		   const FcChar8    *cache_file);

FcBool
FcGlobalCacheUpdate (FcGlobalCache  *cache,
		     const char     *file,
		     FcFontSet	    *set);

FcBool
FcGlobalCacheSave (FcGlobalCache    *cache,
		   const FcChar8    *cache_file);

FcFontSet *
FcCacheRead (FcConfig *config, FcGlobalCache * cache);

FcBool
FcDirCacheWrite (FcFontSet *set, FcStrSet * dirs, const FcChar8 *dir);

FcBool
FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir);

int
FcCacheBankToIndex (int bank);
 
/* fccfg.c */

FcBool
FcConfigAddConfigDir (FcConfig	    *config,
		      const FcChar8 *d);

FcBool
FcConfigAddFontDir (FcConfig	    *config,
		    const FcChar8   *d);

FcBool
FcConfigAddDir (FcConfig	*config,
		const FcChar8	*d);

FcBool
FcConfigAddConfigFile (FcConfig		*config,
		       const FcChar8	*f);

FcBool
FcConfigSetCache (FcConfig	*config,
		  const FcChar8	*c);

FcBool
FcConfigAddBlank (FcConfig	*config,
		  FcChar32    	blank);

FcBool
FcConfigAddEdit (FcConfig	*config,
		 FcTest		*test,
		 FcEdit		*edit,
		 FcMatchKind	kind);

void
FcConfigSetFonts (FcConfig	*config,
		  FcFontSet	*fonts,
		  FcSetName	set);

FcBool
FcConfigCompareValue (const FcValue *m,
		      FcOp	    op,
		      const FcValue *v);

FcBool
FcConfigGlobAdd (FcConfig	*config,
		 const FcChar8	*glob,
		 FcBool		accept);

FcBool
FcConfigAcceptFilename (FcConfig	*config,
			const FcChar8	*filename);

FcBool
FcConfigPatternsAdd (FcConfig	*config,
		     FcPattern	*pattern,
		     FcBool	accept);

FcBool
FcConfigAcceptFont (FcConfig	    *config,
		    const FcPattern *font);

/* fccharset.c */
FcCharSet *
FcCharSetFreeze (FcCharSet *cs);

void
FcCharSetThawAll (void);

FcBool
FcNameUnparseCharSet (FcStrBuf *buf, const FcCharSet *c);

FcCharSet *
FcNameParseCharSet (FcChar8 *string);

FcCharLeaf *
FcCharSetFindLeafCreate (FcCharSet *fcs, FcChar32 ucs4);

void
FcCharSetNewBank (void);

int
FcCharSetNeededBytes (const FcCharSet *c);

void *
FcCharSetDistributeBytes (FcCache * metadata,
			  void * block_ptr);

FcCharSet *
FcCharSetSerialize(int bank, FcCharSet *c);

void *
FcCharSetUnserialize (FcCache metadata, void *block_ptr);

FcCharLeaf *
FcCharSetGetLeaf(const FcCharSet *c, int i);

FcChar16 *
FcCharSetGetNumbers(const FcCharSet *c);

/* fcdbg.c */
void
FcValueListPrint (const FcValueListPtr l);

void
FcLangSetPrint (const FcLangSet *ls);

void
FcOpPrint (FcOp op);

void
FcTestPrint (const FcTest *test);

void
FcExprPrint (const FcExpr *expr);

void
FcEditPrint (const FcEdit *edit);

void
FcSubstPrint (const FcSubst *subst);

int
FcDebug (void);

/* fcdir.c */

FcBool
FcFileIsDir (const FcChar8 *file);

FcBool
FcFileScanConfig (FcFontSet	*set,
		  FcStrSet	*dirs,
		  FcFileCache	*cache,
		  FcBlanks	*blanks,
		  const FcChar8 *file,
		  FcBool	force,
		  FcConfig	*config);

FcBool
FcDirScanConfig (FcFontSet	*set,
		 FcStrSet	*dirs,
		 FcFileCache	*cache,
		 FcBlanks	*blanks,
		 const FcChar8  *dir,
		 FcBool		force,
		 FcConfig	*config);

/* fcfont.c */
int
FcFontDebug (void);
    
/* fcfreetype.c */
FcBool
FcFreeTypeIsExclusiveLang (const FcChar8  *lang);

FcBool
FcFreeTypeHasLang (FcPattern *pattern, const FcChar8 *lang);

FcChar32
FcFreeTypeUcs4ToPrivate (FcChar32 ucs4, const FcCharMap *map);

FcChar32
FcFreeTypePrivateToUcs4 (FcChar32 private, const FcCharMap *map);

const FcCharMap *
FcFreeTypeGetPrivateMap (FT_Encoding encoding);
    
/* fcfs.c */

void
FcFontSetNewBank (void);

int
FcFontSetNeededBytes (FcFontSet *s);

void *
FcFontSetDistributeBytes (FcCache * metadata, void * block_ptr);

FcBool
FcFontSetSerialize (int bank, FcFontSet * s);

FcBool
FcFontSetUnserialize(FcCache metadata, FcFontSet * s, void * block_ptr);

/* fcgram.y */
int
FcConfigparse (void);

int
FcConfigwrap (void);
    
void
FcConfigerror (char *fmt, ...);
    
char *
FcConfigSaveField (const char *field);

void
FcTestDestroy (FcTest *test);

FcExpr *
FcExprCreateInteger (int i);

FcExpr *
FcExprCreateDouble (double d);

FcExpr *
FcExprCreateString (const FcChar8 *s);

FcExpr *
FcExprCreateMatrix (const FcMatrix *m);

FcExpr *
FcExprCreateBool (FcBool b);

FcExpr *
FcExprCreateNil (void);

FcExpr *
FcExprCreateField (const char *field);

FcExpr *
FcExprCreateConst (const FcChar8 *constant);

FcExpr *
FcExprCreateOp (FcExpr *left, FcOp op, FcExpr *right);

void
FcExprDestroy (FcExpr *e);

void
FcEditDestroy (FcEdit *e);

/* fcinit.c */

void
FcMemReport (void);

void
FcMemAlloc (int kind, int size);

void
FcMemFree (int kind, int size);

/* fclang.c */
FcLangSet *
FcFreeTypeLangSet (const FcCharSet  *charset, 
		   const FcChar8    *exclusiveLang);

FcLangResult
FcLangCompare (const FcChar8 *s1, const FcChar8 *s2);
    
const FcCharSet *
FcCharSetForLang (const FcChar8 *lang);

FcLangSet *
FcLangSetPromote (const FcChar8 *lang);

FcLangSet *
FcNameParseLangSet (const FcChar8 *string);

FcBool
FcNameUnparseLangSet (FcStrBuf *buf, const FcLangSet *ls);

void
FcLangSetNewBank (void);

int
FcLangSetNeededBytes (const FcLangSet *l);

void *
FcLangSetDistributeBytes (FcCache * metadata,
			  void * block_ptr);

FcLangSet *
FcLangSetSerialize (int bank, FcLangSet *l);

void *
FcLangSetUnserialize (FcCache metadata, void *block_ptr);

/* fclist.c */

FcBool
FcListPatternMatchAny (const FcPattern *p,
		       const FcPattern *font);

/* fcmatch.c */

/* fcname.c */

FcBool
FcNameBool (const FcChar8 *v, FcBool *result);

void *
FcObjectDistributeBytes (FcCache * metadata,
			 void * block_ptr);

FcObjectPtr
FcObjectToPtr (const char * si);

int
FcObjectNeededBytes (void);

void *
FcObjectUnserialize (FcCache metadata, void *block_ptr);

void
FcObjectSerialize (void);

const char *
FcObjectPtrU (FcObjectPtr p);

int
FcObjectPtrCompare (FcObjectPtr a, FcObjectPtr b);

void
FcObjectStaticNameFini (void);

/* fcpat.c */

FcValue
FcValueCanonicalize (const FcValue *v);

void
FcValueListDestroy (FcValueListPtr l);

FcPatternElt *
FcPatternFindElt (const FcPattern *p, const char *object);

FcPatternElt *
FcPatternInsertElt (FcPattern *p, const char *object);

FcBool
FcPatternAddWithBinding  (FcPattern	    *p,
			  const char	    *object,
			  FcValue	    value,
			  FcValueBinding    binding,
			  FcBool	    append);

FcPattern *
FcPatternFreeze (FcPattern *p);

void
FcPatternFini (void);

FcBool
FcPatternAppend (FcPattern *p, FcPattern *s);

const FcChar8 *
FcStrStaticName (const FcChar8 *name);

FcChar32
FcStringHash (const FcChar8 *s);

void
FcPatternNewBank (void);

int
FcPatternNeededBytes (FcPattern *p);

void *
FcPatternDistributeBytes (FcCache * metadata, void * block_ptr);

FcValueList * 
FcValueListPtrU(FcValueListPtr p);

FcPatternElt *
FcPatternEltU (FcPatternEltPtr pei);

FcValueListPtr
FcValueListPtrCreateDynamic(FcValueList * p);

FcPattern *
FcPatternSerialize (int bank, FcPattern * p);

void *
FcPatternUnserialize (FcCache metadata, void *block_ptr);

/* fcrender.c */

/* fcmatrix.c */

extern const FcMatrix    FcIdentityMatrix;

void
FcMatrixFree (FcMatrix *mat);

/* fcstr.c */
void
FcStrSetSort (FcStrSet * set);

FcChar8 *
FcStrPlus (const FcChar8 *s1, const FcChar8 *s2);
    
void
FcStrFree (FcChar8 *s);

void
FcStrBufInit (FcStrBuf *buf, FcChar8 *init, int size);

void
FcStrBufDestroy (FcStrBuf *buf);

FcChar8 *
FcStrBufDone (FcStrBuf *buf);

FcBool
FcStrBufChar (FcStrBuf *buf, FcChar8 c);

FcBool
FcStrBufString (FcStrBuf *buf, const FcChar8 *s);

FcBool
FcStrBufData (FcStrBuf *buf, const FcChar8 *s, int len);

int
FcStrCmpIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2);

const FcChar8 *
FcStrContainsIgnoreBlanksAndCase (const FcChar8 *s1, const FcChar8 *s2);

const FcChar8 *
FcStrContainsIgnoreCase (const FcChar8 *s1, const FcChar8 *s2);

FcBool
FcStrUsesHome (const FcChar8 *s);

FcChar8 *
FcStrLastSlash (const FcChar8  *path);

FcChar32
FcStrHashIgnoreCase (const FcChar8 *s);

#endif /* _FC_INT_H_ */