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pdfio/pdfio.h
Michael R Sweet 3ec771e688
Add read-back tests.
2021-06-02 15:46:39 -04:00

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//
// Public header file for PDFio.
//
// Copyright © 2021 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#ifndef PDFIO_H
# define PDFIO_H
//
// Include necessary headers...
//
# include <stdio.h>
# include <stdlib.h>
# include <stdbool.h>
# include <sys/types.h>
# include <time.h>
//
// C++ magic...
//
# ifdef __cplusplus
extern "C" {
# endif // __cplusplus
//
// Visibility and other annotations...
//
# if defined(__has_extension) || defined(__GNUC__)
# define PDFIO_PUBLIC __attribute__ ((visibility("default")))
# define PDFIO_FORMAT(a,b) __attribute__ ((__format__(__printf__, a,b)))
# else
# define PDFIO_PUBLIC
# define PDFIO_FORMAT(a,b)
# endif // __has_extension || __GNUC__
//
// Types and constants...
//
typedef struct _pdfio_array_s pdfio_array_t;
// Array of PDF values
typedef struct _pdfio_dict_s pdfio_dict_t;
// Key/value dictionary
typedef struct _pdfio_file_s pdfio_file_t;
// PDF file
typedef bool (*pdfio_error_cb_t)(pdfio_file_t *pdf, const char *message, void *data);
// Error callback
typedef enum pdfio_filter_e // Compression/decompression filters for streams
{
PDFIO_FILTER_NONE, // No filter
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)
} pdfio_filter_t;
typedef struct _pdfio_obj_s pdfio_obj_t;// Numbered object in PDF file
typedef struct pdfio_rect_s // PDF rectangle
{
double x1; // Lower-left X coordinate
double y1; // Lower-left Y coordinate
double x2; // Upper-right X coordinate
double y2; // Upper-right Y coordinate
} 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
PDFIO_VALTYPE_BINARY, // Binary data
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;
typedef struct _pdfio_value_s pdf_value_t;
// PDF value of any type
//
// Functions...
//
extern bool pdfioArrayAppendArray(pdfio_array_t *a, pdfio_array_t *value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendBinary(pdfio_array_t *a, unsigned char *value, size_t valuelen) PDFIO_PUBLIC;
extern bool pdfioArrayAppendBoolean(pdfio_array_t *a, bool 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 pdfioArrayAppendObject(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 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 *pdfioArrayGetObject(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 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 *pdfioDictGetObject(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;
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, unsigned char *value, size_t valuelen) PDFIO_PUBLIC;
extern bool pdfioDictSetBoolean(pdfio_dict_t *dict, const char *key, bool 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 pdfioDictSetObject(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 *pdfioFileCreateObject(pdfio_file_t *pdf, pdfio_dict_t *dict) PDFIO_PUBLIC;
// TODO: Add number, array, string, etc. versions of pdfioFileCreateObject?
extern pdfio_stream_t *pdfioFileCreatePage(pdfio_file_t *pdf, pdfio_dict_t *dict) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileFindObject(pdfio_file_t *pdf, size_t number) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioFileGetID(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern const char *pdfioFileGetName(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern size_t pdfioFileGetNumObjects(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern size_t pdfioFileGetNumPages(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetObject(pdfio_file_t *pdf, size_t n) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetPage(pdfio_file_t *pdf, size_t n) PDFIO_PUBLIC;
extern const char *pdfioFileGetVersion(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern pdfio_file_t *pdfioFileOpen(const char *filename, pdfio_error_cb_t error_cb, void *error_data) 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 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;
//
// C++ magic...
//
# ifdef __cplusplus
}
# endif // __cplusplus
#endif // !PDFIO_H
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