/* Copyright 2014 Adobe Systems Incorporated (http://www.adobe.com/). All Rights Reserved.
   This software is licensed as OpenSource, under the Apache License, Version 2.0. 
   This license is available at: http://opensource.org/licenses/Apache-2.0. */
/***********************************************************************/

/*
 * CharString processor.
 */

#ifndef CS_H
#define CS_H

#include "common.h"
#include "pstoken.h"
#include <stdint.h>

#define CS_MAX_SIZE 65535 /* Max charstring size (bytes) */

/* Single char/subr reference */
typedef struct {
    unsigned short length;
    char *cstr;
} Charstring;

/* Grouped charstring/subr data */
typedef struct {
    unsigned short nStrings;
    Offset *offset; /* Offset (index) array */
    char *data;     /* Charstring data buffer */
    char *refcopy;  /* Copy of "data" pointer for use by subroutinizer */
} CSData;

/* Vector conversion subr record */
typedef struct {
    SID sid;
    unsigned short iSubr; /* Subr index */
    Charstring data;      /* Subr data */
} ConvSubr;

#include "font.h"

/* Charstring conversion procs */
typedef void (*csDecrypt)(unsigned length, unsigned char *cstr);
typedef struct {
    void (*newFont)(tcCtx g, Font *font);
    long (*endFont)(tcCtx g);
    void (*addChar)(tcCtx g, unsigned length, char *cstr, unsigned id,
                    unsigned nSubrs, Charstring *subrs, int fd);
    char *(*getChar)(tcCtx g, unsigned iChar, int fd, unsigned *length);
    void (*writeChar)(tcCtx g, Font *font, unsigned iChar);
    void (*addAuth)(tcCtx g, char *auth);
} csConvProcs;

void csNew(tcCtx g);
void csFree(tcCtx g);

void csNewFont(tcCtx g, Font *font);
void csNewPrivate(tcCtx g, int fd, int lenIV, csDecrypt decrypt);
void csAddSubr(tcCtx g, unsigned length, char *cstr, int fd);
void csAddChar(tcCtx g, unsigned length, char *cstr,
               unsigned id, int fd, int encrypted);
void csEndFont(tcCtx g, unsigned nChars, unsigned short *recode);
void csSetConvProcs(tcCtx g, csConvProcs *procs);

int csEncInteger(int32_t i, char *t);
int csEncFixed(Fixed f, char *t);

long csSizeChars(tcCtx g, Font *font);
void csWriteChars(tcCtx g, Font *font);

void csWriteData(tcCtx g, CSData *data, long dataSize, int offSize);
void csFreeData(tcCtx g, CSData *data);
void csFreeFont(tcCtx g, Font *font);

#if TC_DEBUG
unsigned csDump(long length, unsigned char *cstr, int nMasters, int t1);
void csDumpSubrs(tcCtx g, Font *font);

#endif /* TC_DEBUG */

#endif /* CS_H */
