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/* epdf.h
Copyright 1996-2006 Han The Thanh <thanh@pdftex.org>
Copyright 2006-2015 Taco Hoekwater <taco@luatex.org>
This file is part of LuaTeX.
LuaTeX is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.
LuaTeX is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU General Public License along
with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
/* this is the common header file for C++ sources pdftoepdf.c and lepdflib.c */
#ifndef EPDF_H
# define EPDF_H
/*extern "C" {*/
#ifdef HAVE_CONFIG_H
#include <w2c/config.h>
#endif
/*}*/
# include <stdlib.h>
# include <math.h>
# include <stddef.h>
# include <stdio.h>
# include <string.h>
# include <kpathsea/c-ctype.h>
# include <kpathsea/simpletypes.h>
# include <sys/stat.h>
# include <dirent.h>
/*extern "C" { */
# include <kpathsea/c-auto.h>
extern char *xstrdup(const char *);
typedef enum { FE_FAIL, FE_RETURN_NULL } file_error_mode;
/* the following code is extremly ugly but needed for including web2c/config.h */
/*typedef const char *const_string;*/ /* including kpathsea/types.h doesn't work on some systems */
# define KPATHSEA_CONFIG_H /* avoid including other kpathsea header files */
/* from web2c/config.h */
# ifdef CONFIG_H /* CONFIG_H has been defined by some xpdf */
# undef CONFIG_H /* header file */
# endif
# include <c-auto.h> /* define SIZEOF_LONG */
# include "image.h"
# include "utils/avlstuff.h"
# include "pdf/pdftypes.h"
# include "lua.h"
# include "lauxlib.h"
# include "luapplib/src/pplib.h"
/* pdfgen.w */
extern int ten_pow[10];
__attribute__ ((format(printf, 2, 3)))
extern void pdf_printf(PDF, const char *fmt, ...);
extern void pdf_begin_obj(PDF, int, int);
extern void pdf_end_obj(PDF);
extern void pdf_begin_dict(PDF);
extern void pdf_end_dict(PDF);
extern void pdf_begin_array(PDF);
extern void pdf_end_array(PDF);
extern void pdf_add_null(PDF);
extern void pdf_add_bool(PDF, int i);
extern void pdf_add_int(PDF, int i);
extern void pdf_add_real(PDF, double d);
extern void pdf_add_ref(PDF, int num);
extern void pdf_add_name(PDF, const char *name);
extern void pdf_dict_add_streaminfo(PDF);
extern void pdf_begin_stream(PDF);
extern void pdf_end_stream(PDF);
extern void pdf_room(PDF, int);
extern void pdf_out_block(PDF pdf, const char *s, size_t n);
extern void pdf_dict_add_int(PDF, const char *key, int i);
extern void pdf_dict_add_ref(PDF, const char *key, int num);
extern void pdf_dict_add_name(PDF, const char *key, const char *val);
extern void pdf_dict_add_streaminfo(PDF);
/* Conflict with pdfgen.h */
/*# define pdf_out(pdf, A) do { pdf_room(pdf, 1); *(pdf->buf->p++) = A; } while (0)*/
/*# define pdf_quick_out(pdf,A) *(pdf->buf->p++)=(unsigned char)(A) */
# define pdf_puts(pdf, s) pdf_out_block((pdf), (s), strlen(s))
/* pdfpage.w */
extern void print_pdffloat(PDF pdf, pdffloat f);
/* pdftables.w */
extern int pdf_create_obj(PDF pdf, int t, int i);
/* pdftoepdf.c */
extern void read_pdf_info(image_dict *);
extern void flush_pdf_info(image_dict *);
extern void write_epdf(PDF, image_dict *, int suppress_optional_info);
extern int write_epdf_object(PDF, image_dict *, int n);
extern void unrefPdfDocument(char *);
extern void unrefMemStreamPdfDocument(char *);
extern void epdf_free(void);
/* writeimg.w */
extern void pdf_dict_add_img_filename(PDF pdf, image_dict * idict);
/* utils.w */
/*extern char *convertStringToPDFString(const char *in, int len);*/
/* lepdflib.w */
int luaopen_epdf(lua_State * L);
# include "luatex-common.h"
/*}*/
typedef struct InObj InObj;
struct InObj {
/* int version; */ /* old object number in included PDF */
int objnum; /* old version number in included PDF, we can do without */
int num; /* new object number in output PDF */
InObj *next; /* next entry in list of indirect objects */
} ;
typedef struct avl_table avl_table;
struct PdfDocument {
char *file_path; /* full file name including path */
char *checksum; /* for reopening */
ppdoc *pdfe;
InObj *inObjList; /* temporary linked list */
avl_table *ObjMapTree; /* permanent over luatex run */
int is_mem;
char *memstream;
unsigned int occurences; /* number of references to the PdfDocument; it can be deleted when occurences == 0 */
unsigned int pc; /* counter to track PDFDoc generation or deletion */
};
typedef struct PdfDocument PdfDocument;
PdfDocument *refPdfDocument(const char *file_path, file_error_mode fe, const char *userpassword, const char *ownerpassword);
PdfDocument *refMemStreamPdfDocument(char *docstream, unsigned long long streamsize, const char *file_id);
#define STREAM_CHECKSUM_SIZE 16 // md5
#define STRSTREAM_CHECKSUM_SIZE 1+((unsigned int)(log((double)ULONG_MAX)/log(16.0))) // djb2 printable digest as hex stream
#define STREAM_FILE_ID_LEN 2048 // 2048 bytes are enough to make a strong almost-unique name
#define STREAM_URI "data:application/pdf,"
#define STREAM_URI_LEN 21 // length of "data:application/pdf," without final '\0'
#endif /* EPDF_H */
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