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#ifndef MUPDF_PDF_XREF_H
#define MUPDF_PDF_XREF_H
/*
pdf_create_object: Allocate a slot in the xref table and return a fresh unused object number.
*/
int pdf_create_object(fz_context *ctx, pdf_document *doc);
/*
pdf_delete_object: Remove object from xref table, marking the slot as free.
*/
void pdf_delete_object(fz_context *ctx, pdf_document *doc, int num);
/*
pdf_update_object: Replace object in xref table with the passed in object.
*/
void pdf_update_object(fz_context *ctx, pdf_document *doc, int num, pdf_obj *obj);
/*
pdf_update_stream: Replace stream contents for object in xref table with the passed in buffer.
The buffer contents must match the /Filter setting if 'compressed' is true.
If 'compressed' is false, the /Filter and /DecodeParms entries are deleted.
The /Length entry is updated.
*/
void pdf_update_stream(fz_context *ctx, pdf_document *doc, pdf_obj *ref, fz_buffer *buf, int compressed);
pdf_obj *pdf_add_object(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
pdf_obj *pdf_add_object_drop(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
pdf_obj *pdf_add_stream(fz_context *ctx, pdf_document *doc, fz_buffer *buf, pdf_obj *obj, int compressed);
pdf_obj *pdf_add_new_dict(fz_context *ctx, pdf_document *doc, int initial);
pdf_obj *pdf_add_new_array(fz_context *ctx, pdf_document *doc, int initial);
/*
* xref and object / stream api
*/
typedef struct pdf_xref_entry_s pdf_xref_entry;
struct pdf_xref_entry_s
{
char type; /* 0=unset (f)ree i(n)use (o)bjstm */
unsigned char marked; /* marked to keep alive with pdf_mark_xref */
unsigned short gen; /* generation / objstm index */
int num; /* original object number (for decryption after renumbering) */
int64_t ofs; /* file offset / objstm object number */
int64_t stm_ofs; /* on-disk stream */
fz_buffer *stm_buf; /* in-memory stream (for updated objects) */
pdf_obj *obj; /* stored/cached object */
};
typedef struct pdf_xref_subsec_s pdf_xref_subsec;
struct pdf_xref_subsec_s
{
pdf_xref_subsec *next;
int len;
int start;
pdf_xref_entry *table;
};
struct pdf_xref_s
{
int num_objects;
pdf_xref_subsec *subsec;
pdf_obj *trailer;
pdf_obj *pre_repair_trailer;
pdf_unsaved_sig *unsaved_sigs;
pdf_unsaved_sig **unsaved_sigs_end;
int64_t end_ofs; /* file offset to end of xref */
};
pdf_xref_entry *pdf_cache_object(fz_context *ctx, pdf_document *doc, int num);
int pdf_count_objects(fz_context *ctx, pdf_document *doc);
pdf_obj *pdf_resolve_indirect(fz_context *ctx, pdf_obj *ref);
pdf_obj *pdf_resolve_indirect_chain(fz_context *ctx, pdf_obj *ref);
pdf_obj *pdf_load_object(fz_context *ctx, pdf_document *doc, int num);
fz_buffer *pdf_load_raw_stream_number(fz_context *ctx, pdf_document *doc, int num);
fz_buffer *pdf_load_raw_stream(fz_context *ctx, pdf_obj *ref);
fz_buffer *pdf_load_stream_number(fz_context *ctx, pdf_document *doc, int num);
fz_buffer *pdf_load_stream(fz_context *ctx, pdf_obj *ref);
fz_stream *pdf_open_raw_stream_number(fz_context *ctx, pdf_document *doc, int num);
fz_stream *pdf_open_raw_stream(fz_context *ctx, pdf_obj *ref);
fz_stream *pdf_open_stream_number(fz_context *ctx, pdf_document *doc, int num);
fz_stream *pdf_open_stream(fz_context *ctx, pdf_obj *ref);
fz_stream *pdf_open_inline_stream(fz_context *ctx, pdf_document *doc, pdf_obj *stmobj, int length, fz_stream *chain, fz_compression_params *params);
fz_compressed_buffer *pdf_load_compressed_stream(fz_context *ctx, pdf_document *doc, int num);
void pdf_load_compressed_inline_image(fz_context *ctx, pdf_document *doc, pdf_obj *dict, int length, fz_stream *cstm, int indexed, fz_compressed_image *image);
fz_stream *pdf_open_stream_with_offset(fz_context *ctx, pdf_document *doc, int num, pdf_obj *dict, int64_t stm_ofs);
fz_stream *pdf_open_compressed_stream(fz_context *ctx, fz_compressed_buffer *);
fz_stream *pdf_open_contents_stream(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
fz_buffer *pdf_load_stream_truncated(fz_context *ctx, pdf_document *doc, int num, int *truncated);
pdf_obj *pdf_trailer(fz_context *ctx, pdf_document *doc);
void pdf_set_populating_xref_trailer(fz_context *ctx, pdf_document *doc, pdf_obj *trailer);
int pdf_xref_len(fz_context *ctx, pdf_document *doc);
pdf_xref_entry *pdf_get_populating_xref_entry(fz_context *ctx, pdf_document *doc, int i);
pdf_xref_entry *pdf_get_xref_entry(fz_context *ctx, pdf_document *doc, int i);
void pdf_replace_xref(fz_context *ctx, pdf_document *doc, pdf_xref_entry *entries, int n);
void pdf_xref_ensure_incremental_object(fz_context *ctx, pdf_document *doc, int num);
int pdf_xref_is_incremental(fz_context *ctx, pdf_document *doc, int num);
void pdf_xref_store_unsaved_signature(fz_context *ctx, pdf_document *doc, pdf_obj *field, pdf_pkcs7_signer *signer);
int pdf_xref_obj_is_unsaved_signature(pdf_document *doc, pdf_obj *obj);
void pdf_repair_xref(fz_context *ctx, pdf_document *doc);
void pdf_repair_obj_stms(fz_context *ctx, pdf_document *doc);
void pdf_ensure_solid_xref(fz_context *ctx, pdf_document *doc, int num);
void pdf_mark_xref(fz_context *ctx, pdf_document *doc);
void pdf_clear_xref(fz_context *ctx, pdf_document *doc);
void pdf_clear_xref_to_mark(fz_context *ctx, pdf_document *doc);
int pdf_repair_obj(fz_context *ctx, pdf_document *doc, pdf_lexbuf *buf, int64_t *stmofsp, int *stmlenp, pdf_obj **encrypt, pdf_obj **id, pdf_obj **page, int64_t *tmpofs, pdf_obj **root);
pdf_obj *pdf_progressive_advance(fz_context *ctx, pdf_document *doc, int pagenum);
void pdf_print_xref(fz_context *ctx, pdf_document *);
#endif
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