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pdfio/pdfio.h

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Initial checkin.
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//
Rename as PDFio for consistency. Add PDFio logo image. Move documentation to "doc" subdirectory.
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// Public header file for PDFio.
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//
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// Copyright © 2021-2024 by Michael R Sweet.
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//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#ifndef PDFIO_H
# define PDFIO_H
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# include <stdio.h>
# include <stdlib.h>
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# include <stdbool.h>
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# include <sys/types.h>
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# include <time.h>
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# ifdef __cplusplus
extern "C" {
# endif // __cplusplus
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//
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// Version number...
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//
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# define PDFIO_VERSION "1.3.1"
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//
// Visibility and other annotations...
//
# if defined(__has_extension) || defined(__GNUC__)
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# define _PDFIO_PUBLIC __attribute__ ((visibility("default")))
# define _PDFIO_FORMAT(a,b) __attribute__ ((__format__(__printf__, a,b)))
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# define _PDFIO_DEPRECATED __attribute__ ((deprecated)) _PDFIO_PUBLIC
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# else
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# define _PDFIO_PUBLIC
# define _PDFIO_FORMAT(a,b)
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# define _PDFIO_DEPRECATED
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# endif // __has_extension || __GNUC__
//
// Types and constants...
//
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# if _WIN32
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typedef __int64 ssize_t; // POSIX type not present on Windows... @private@
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# endif // _WIN32
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typedef struct _pdfio_array_s pdfio_array_t;
// Array of PDF values
typedef struct _pdfio_dict_s pdfio_dict_t;
// Key/value dictionary
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typedef bool (*pdfio_dict_cb_t)(pdfio_dict_t *dict, const char *key, void *cb_data);
// Dictionary iterator callback
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typedef struct _pdfio_file_s pdfio_file_t;
// PDF file
pdfio_dict_t implementation
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typedef bool (*pdfio_error_cb_t)(pdfio_file_t *pdf, const char *message, void *data);
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// Error callback
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typedef enum pdfio_encryption_e // PDF encryption modes
{
PDFIO_ENCRYPTION_NONE = 0, // No encryption
PDFIO_ENCRYPTION_RC4_40, // 40-bit RC4 encryption (PDF 1.3)
PDFIO_ENCRYPTION_RC4_128, // 128-bit RC4 encryption (PDF 1.4)
PDFIO_ENCRYPTION_AES_128, // 128-bit AES encryption (PDF 1.6)
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PDFIO_ENCRYPTION_AES_256 // 256-bit AES encryption (PDF 2.0) @exclude all@
Implement pdfioFileSetPermissions.
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} pdfio_encryption_t;
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typedef enum pdfio_filter_e // Compression/decompression filters for streams
{
PDFIO_FILTER_NONE, // No filter
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PDFIO_FILTER_ASCIIHEX, // ASCIIHexDecode filter (reading only)
PDFIO_FILTER_ASCII85, // ASCII85Decode filter (reading only)
PDFIO_FILTER_CCITTFAX, // CCITTFaxDecode filter
PDFIO_FILTER_CRYPT, // Encryption filter
PDFIO_FILTER_DCT, // DCTDecode (JPEG) filter
PDFIO_FILTER_FLATE, // FlateDecode filter
PDFIO_FILTER_JBIG2, // JBIG2Decode filter
PDFIO_FILTER_JPX, // JPXDecode filter (reading only)
PDFIO_FILTER_LZW, // LZWDecode filter (reading only)
PDFIO_FILTER_RUNLENGTH, // RunLengthDecode filter (reading only)
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} pdfio_filter_t;
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typedef struct _pdfio_obj_s pdfio_obj_t;// Numbered object in PDF file
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typedef ssize_t (*pdfio_output_cb_t)(void *ctx, const void *data, size_t datalen);
// Output callback for pdfioFileCreateOutput
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typedef const char *(*pdfio_password_cb_t)(void *data, const char *filename);
// Password callback for pdfioFileOpen
Implement pdfioFileSetPermissions.
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enum pdfio_permission_e // PDF permission bits
{
PDFIO_PERMISSION_NONE = 0, // No permissions
PDFIO_PERMISSION_PRINT = 0x0004, // PDF allows printing
PDFIO_PERMISSION_MODIFY = 0x0008, // PDF allows modification
PDFIO_PERMISSION_COPY = 0x0010, // PDF allows copying
PDFIO_PERMISSION_ANNOTATE = 0x0020, // PDF allows annotation
PDFIO_PERMISSION_FORMS = 0x0100, // PDF allows filling in forms
PDFIO_PERMISSION_READING = 0x0200, // PDF allows screen reading/accessibility (deprecated in PDF 2.0)
PDFIO_PERMISSION_ASSEMBLE = 0x0400, // PDF allows assembly (insert, delete, or rotate pages, add document outlines and thumbnails)
PDFIO_PERMISSION_PRINT_HIGH = 0x0800, // PDF allows high quality printing
PDFIO_PERMISSION_ALL = ~0 // All permissions
};
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typedef int pdfio_permission_t; // PDF permission bitfield
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typedef struct pdfio_rect_s // PDF rectangle
{
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double x1; // Lower-left X coordinate
double y1; // Lower-left Y coordinate
double x2; // Upper-right X coordinate
double y2; // Upper-right Y coordinate
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} pdfio_rect_t;
typedef struct _pdfio_stream_s pdfio_stream_t;
// Object data stream in PDF file
typedef enum pdfio_valtype_e // PDF value types
{
PDFIO_VALTYPE_NONE, // No value, not set
PDFIO_VALTYPE_ARRAY, // Array
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PDFIO_VALTYPE_BINARY, // Binary data
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PDFIO_VALTYPE_BOOLEAN, // Boolean
PDFIO_VALTYPE_DATE, // Date/time
PDFIO_VALTYPE_DICT, // Dictionary
PDFIO_VALTYPE_INDIRECT, // Indirect object (N G obj)
PDFIO_VALTYPE_NAME, // Name
PDFIO_VALTYPE_NULL, // Null object
PDFIO_VALTYPE_NUMBER, // Number (integer or real)
PDFIO_VALTYPE_STRING // String
} pdfio_valtype_t;
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//
// Functions...
//
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extern bool pdfioArrayAppendArray(pdfio_array_t *a, pdfio_array_t *value) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendBinary(pdfio_array_t *a, const unsigned char *value, size_t valuelen) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendBoolean(pdfio_array_t *a, bool value) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendDate(pdfio_array_t *a, time_t value) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendDict(pdfio_array_t *a, pdfio_dict_t *value) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendName(pdfio_array_t *a, const char *value) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendNumber(pdfio_array_t *a, double value) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendObj(pdfio_array_t *a, pdfio_obj_t *value) _PDFIO_PUBLIC;
extern bool pdfioArrayAppendString(pdfio_array_t *a, const char *value) _PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayCopy(pdfio_file_t *pdf, pdfio_array_t *a) _PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayCreate(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayGetArray(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern unsigned char *pdfioArrayGetBinary(pdfio_array_t *a, size_t n, size_t *length) _PDFIO_PUBLIC;
extern bool pdfioArrayGetBoolean(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern time_t pdfioArrayGetDate(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioArrayGetDict(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern const char *pdfioArrayGetName(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern double pdfioArrayGetNumber(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioArrayGetObj(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern size_t pdfioArrayGetSize(pdfio_array_t *a) _PDFIO_PUBLIC;
extern const char *pdfioArrayGetString(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern pdfio_valtype_t pdfioArrayGetType(pdfio_array_t *a, size_t n) _PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioDictCopy(pdfio_file_t *pdf, pdfio_dict_t *dict) _PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioDictCreate(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern pdfio_array_t *pdfioDictGetArray(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern unsigned char *pdfioDictGetBinary(pdfio_dict_t *dict, const char *key, size_t *length) _PDFIO_PUBLIC;
extern bool pdfioDictGetBoolean(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern time_t pdfioDictGetDate(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioDictGetDict(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern const char *pdfioDictGetName(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern double pdfioDictGetNumber(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioDictGetObj(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern pdfio_rect_t *pdfioDictGetRect(pdfio_dict_t *dict, const char *key, pdfio_rect_t *rect) _PDFIO_PUBLIC;
extern const char *pdfioDictGetString(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern pdfio_valtype_t pdfioDictGetType(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
Implement pdfioDictIterateKeys API (Issue #31)
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extern void pdfioDictIterateKeys(pdfio_dict_t *dict, pdfio_dict_cb_t cb, void *cb_data) _PDFIO_PUBLIC;
Save work on documentation.
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extern bool pdfioDictSetArray(pdfio_dict_t *dict, const char *key, pdfio_array_t *value) _PDFIO_PUBLIC;
extern bool pdfioDictSetBinary(pdfio_dict_t *dict, const char *key, const unsigned char *value, size_t valuelen) _PDFIO_PUBLIC;
extern bool pdfioDictSetBoolean(pdfio_dict_t *dict, const char *key, bool value) _PDFIO_PUBLIC;
extern bool pdfioDictSetDate(pdfio_dict_t *dict, const char *key, time_t value) _PDFIO_PUBLIC;
extern bool pdfioDictSetDict(pdfio_dict_t *dict, const char *key, pdfio_dict_t *value) _PDFIO_PUBLIC;
extern bool pdfioDictSetName(pdfio_dict_t *dict, const char *key, const char *value) _PDFIO_PUBLIC;
extern bool pdfioDictSetNull(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
extern bool pdfioDictSetNumber(pdfio_dict_t *dict, const char *key, double value) _PDFIO_PUBLIC;
extern bool pdfioDictSetObj(pdfio_dict_t *dict, const char *key, pdfio_obj_t *value) _PDFIO_PUBLIC;
extern bool pdfioDictSetRect(pdfio_dict_t *dict, const char *key, pdfio_rect_t *value) _PDFIO_PUBLIC;
extern bool pdfioDictSetString(pdfio_dict_t *dict, const char *key, const char *value) _PDFIO_PUBLIC;
extern bool pdfioDictSetStringf(pdfio_dict_t *dict, const char *key, const char *format, ...) _PDFIO_PUBLIC _PDFIO_FORMAT(3,4);
extern bool pdfioFileClose(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern pdfio_file_t *pdfioFileCreate(const char *filename, const char *version, pdfio_rect_t *media_box, pdfio_rect_t *crop_box, pdfio_error_cb_t error_cb, void *error_data) _PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreateArrayObj(pdfio_file_t *pdf, pdfio_array_t *array) _PDFIO_PUBLIC;
Add pdfioFileCreateNumber/StringObj functions (Issue #14)
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extern pdfio_obj_t *pdfioFileCreateNumberObj(pdfio_file_t *pdf, double number) _PDFIO_PUBLIC;
Save work on documentation.
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extern pdfio_obj_t *pdfioFileCreateObj(pdfio_file_t *pdf, pdfio_dict_t *dict) _PDFIO_PUBLIC;
Add pdfioFileCreateOutput API (Issue #21)
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extern pdfio_file_t *pdfioFileCreateOutput(pdfio_output_cb_t output_cb, void *output_ctx, const char *version, pdfio_rect_t *media_box, pdfio_rect_t *crop_box, pdfio_error_cb_t error_cb, void *error_data) _PDFIO_PUBLIC;
Initial writing support.
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// TODO: Add number, array, string, etc. versions of pdfioFileCreateObject?
Save work on documentation.
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extern pdfio_stream_t *pdfioFileCreatePage(pdfio_file_t *pdf, pdfio_dict_t *dict) _PDFIO_PUBLIC;
Add pdfioFileCreateNumber/StringObj functions (Issue #14)
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extern pdfio_obj_t *pdfioFileCreateStringObj(pdfio_file_t *pdf, const char *s) _PDFIO_PUBLIC;
Add pdfioFileCreateTemporary function (Issue #29)
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extern pdfio_file_t *pdfioFileCreateTemporary(char *buffer, size_t bufsize, const char *version, pdfio_rect_t *media_box, pdfio_rect_t *crop_box, pdfio_error_cb_t error_cb, void *error_data) _PDFIO_PUBLIC;
Save work on documentation.
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extern pdfio_obj_t *pdfioFileFindObj(pdfio_file_t *pdf, size_t number) _PDFIO_PUBLIC;
extern const char *pdfioFileGetAuthor(pdfio_file_t *pdf) _PDFIO_PUBLIC;
Add pdfioFileGetCatalog function (Issue #67) Refactor the pdfioFileCreateXxx functions to use a common (private) function to handle creating/initializing the pdfio_file_t object and base file objects. Update unit tests to display the filename for the pdfioFileClose test.
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extern pdfio_dict_t *pdfioFileGetCatalog(pdfio_file_t *pdf) _PDFIO_PUBLIC;
Save work on documentation.
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extern time_t pdfioFileGetCreationDate(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern const char *pdfioFileGetCreator(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern pdfio_array_t *pdfioFileGetID(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern const char *pdfioFileGetKeywords(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern const char *pdfioFileGetName(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern size_t pdfioFileGetNumObjs(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern size_t pdfioFileGetNumPages(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetObj(pdfio_file_t *pdf, size_t n) _PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetPage(pdfio_file_t *pdf, size_t n) _PDFIO_PUBLIC;
Do some reorganization and start the implementation of decryption.
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extern pdfio_permission_t pdfioFileGetPermissions(pdfio_file_t *pdf, pdfio_encryption_t *encryption) _PDFIO_PUBLIC;
Save work on documentation.
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extern const char *pdfioFileGetProducer(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern const char *pdfioFileGetSubject(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern const char *pdfioFileGetTitle(pdfio_file_t *pdf) _PDFIO_PUBLIC;
extern const char *pdfioFileGetVersion(pdfio_file_t *pdf) _PDFIO_PUBLIC;
Add placeholder password callback to support reading of encrypted PDF files in the future.
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extern pdfio_file_t *pdfioFileOpen(const char *filename, pdfio_password_cb_t password_cb, void *password_data, pdfio_error_cb_t error_cb, void *error_data) _PDFIO_PUBLIC;
Save work on documentation.
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extern void pdfioFileSetAuthor(pdfio_file_t *pdf, const char *value) _PDFIO_PUBLIC;
extern void pdfioFileSetCreationDate(pdfio_file_t *pdf, time_t value) _PDFIO_PUBLIC;
extern void pdfioFileSetCreator(pdfio_file_t *pdf, const char *value) _PDFIO_PUBLIC;
extern void pdfioFileSetKeywords(pdfio_file_t *pdf, const char *value) _PDFIO_PUBLIC;
Implement pdfioFileSetPermissions.
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extern bool pdfioFileSetPermissions(pdfio_file_t *pdf, pdfio_permission_t permissions, pdfio_encryption_t encryption, const char *owner_password, const char *user_password) _PDFIO_PUBLIC;
Save work on documentation.
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extern void pdfioFileSetSubject(pdfio_file_t *pdf, const char *value) _PDFIO_PUBLIC;
extern void pdfioFileSetTitle(pdfio_file_t *pdf, const char *value) _PDFIO_PUBLIC;
extern bool pdfioObjClose(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioObjCopy(pdfio_file_t *pdf, pdfio_obj_t *srcobj) _PDFIO_PUBLIC;
extern pdfio_stream_t *pdfioObjCreateStream(pdfio_obj_t *obj, pdfio_filter_t compression) _PDFIO_PUBLIC;
extern pdfio_array_t *pdfioObjGetArray(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioObjGetDict(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern unsigned short pdfioObjGetGeneration(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern size_t pdfioObjGetLength(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern size_t pdfioObjGetNumber(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern const char *pdfioObjGetSubtype(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern const char *pdfioObjGetType(pdfio_obj_t *obj) _PDFIO_PUBLIC;
extern pdfio_stream_t *pdfioObjOpenStream(pdfio_obj_t *obj, bool decode) _PDFIO_PUBLIC;
extern bool pdfioPageCopy(pdfio_file_t *pdf, pdfio_obj_t *srcpage) _PDFIO_PUBLIC;
extern size_t pdfioPageGetNumStreams(pdfio_obj_t *page) _PDFIO_PUBLIC;
extern pdfio_stream_t *pdfioPageOpenStream(pdfio_obj_t *page, size_t n, bool decode) _PDFIO_PUBLIC;
extern bool pdfioStreamClose(pdfio_stream_t *st) _PDFIO_PUBLIC;
extern bool pdfioStreamConsume(pdfio_stream_t *st, size_t bytes) _PDFIO_PUBLIC;
extern bool pdfioStreamGetToken(pdfio_stream_t *st, char *buffer, size_t bufsize) _PDFIO_PUBLIC;
extern ssize_t pdfioStreamPeek(pdfio_stream_t *st, void *buffer, size_t bytes) _PDFIO_PUBLIC;
extern bool pdfioStreamPrintf(pdfio_stream_t *st, const char *format, ...) _PDFIO_PUBLIC _PDFIO_FORMAT(2,3);
extern bool pdfioStreamPutChar(pdfio_stream_t *st, int ch) _PDFIO_PUBLIC;
extern bool pdfioStreamPuts(pdfio_stream_t *st, const char *s) _PDFIO_PUBLIC;
extern ssize_t pdfioStreamRead(pdfio_stream_t *st, void *buffer, size_t bytes) _PDFIO_PUBLIC;
extern bool pdfioStreamWrite(pdfio_stream_t *st, const void *buffer, size_t bytes) _PDFIO_PUBLIC;
extern char *pdfioStringCreate(pdfio_file_t *pdf, const char *s) _PDFIO_PUBLIC;
extern char *pdfioStringCreatef(pdfio_file_t *pdf, const char *format, ...) _PDFIO_FORMAT(2,3) _PDFIO_PUBLIC;
Add string array, have the pdfio_file_t object manage allocated data.
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Initial checkin.
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# ifdef __cplusplus
}
# endif // __cplusplus
#endif // !PDFIO_H
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