fpdf_parser_decode.cpp File Reference

(e4657a741c23c8f48e0e97ae2091dc2d99f4f27d)

#include "core/fpdfapi/parser/fpdf_parser_decode.h"
#include <ctype.h>
#include <limits.h>
#include <stddef.h>
#include <algorithm>
#include <array>
#include <utility>
#include "build/build_config.h"
#include "constants/stream_dict_common.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/fpdf_parser_utility.h"
#include "core/fxcodec/data_and_bytes_consumed.h"
#include "core/fxcodec/fax/faxmodule.h"
#include "core/fxcodec/flate/flatemodule.h"
#include "core/fxcodec/scanlinedecoder.h"
#include "core/fxcrt/check.h"
#include "core/fxcrt/compiler_specific.h"
#include "core/fxcrt/containers/contains.h"
#include "core/fxcrt/fx_extension.h"
#include "core/fxcrt/fx_memcpy_wrappers.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/numerics/safe_conversions.h"
#include "core/fxcrt/span.h"
#include "core/fxcrt/stl_util.h"
#include "core/fxcrt/utf16.h"

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Functions
bool	ValidateDecoderPipeline (const CPDF_Array *pDecoders)
DataAndBytesConsumed	A85Decode (pdfium::span< const uint8_t > src_span)
DataAndBytesConsumed	HexDecode (pdfium::span< const uint8_t > src_span)
DataAndBytesConsumed	RunLengthDecode (pdfium::span< const uint8_t > src_span)
std::unique_ptr< ScanlineDecoder >	CreateFaxDecoder (pdfium::span< const uint8_t > src_span, int width, int height, const CPDF_Dictionary *pParams)
std::unique_ptr< ScanlineDecoder >	CreateFlateDecoder (pdfium::span< const uint8_t > src_span, int width, int height, int nComps, int bpc, const CPDF_Dictionary *pParams)
DataAndBytesConsumed	FlateOrLZWDecode (bool use_lzw, pdfium::span< const uint8_t > src_span, const CPDF_Dictionary *pParams, uint32_t estimated_size)
std::optional< DecoderArray >	GetDecoderArray (RetainPtr< const CPDF_Dictionary > pDict)
std::optional< PDFDataDecodeResult >	PDF_DataDecode (pdfium::span< const uint8_t > src_span, uint32_t last_estimated_size, bool bImageAcc, const DecoderArray &decoder_array)
static size_t	StripLanguageCodes (pdfium::span< wchar_t > s, size_t n)
WideString	PDF_DecodeText (pdfium::span< const uint8_t > span)
ByteString	PDF_EncodeText (WideStringView str)
ByteString	PDF_EncodeString (ByteStringView src)
ByteString	PDF_HexEncodeString (ByteStringView src)

Variables
const std::array< uint16_t, 256 >	kPDFDocEncoding

Function Documentation

A85Decode()

DataAndBytesConsumed A85Decode

(

pdfium::span< const uint8_t >

src_span

)

Definition at line 117 of file fpdf_parser_decode.cpp.

References PDFCharIsLineEnding().

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CreateFaxDecoder()

std::unique_ptr< ScanlineDecoder > CreateFaxDecoder	(	pdfium::span< const uint8_t >	src_span,
		int	width,
		int	height,
		const CPDF_Dictionary *	pParams )

Definition at line 307 of file fpdf_parser_decode.cpp.

References CPDF_Dictionary::GetIntegerFor(), and CPDF_Dictionary::GetIntegerFor().

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CreateFlateDecoder()

std::unique_ptr< ScanlineDecoder > CreateFlateDecoder	(	pdfium::span< const uint8_t >	src_span,
		int	width,
		int	height,
		int	nComps,
		int	bpc,
		const CPDF_Dictionary *	pParams )

Definition at line 332 of file fpdf_parser_decode.cpp.

References CPDF_Dictionary::GetIntegerFor(), and CPDF_Dictionary::GetIntegerFor().

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FlateOrLZWDecode()

DataAndBytesConsumed FlateOrLZWDecode	(	bool	use_lzw,
		pdfium::span< const uint8_t >	src_span,
		const CPDF_Dictionary *	pParams,
		uint32_t	estimated_size )

Definition at line 356 of file fpdf_parser_decode.cpp.

References CPDF_Dictionary::GetIntegerFor(), and CPDF_Dictionary::GetIntegerFor().

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GetDecoderArray()

std::optional< DecoderArray > GetDecoderArray

(

RetainPtr< const CPDF_Dictionary >

pDict

)

Definition at line 379 of file fpdf_parser_decode.cpp.

References ValidateDecoderPipeline().

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HexDecode()

DataAndBytesConsumed HexDecode

(

pdfium::span< const uint8_t >

src_span

)

Definition at line 204 of file fpdf_parser_decode.cpp.

References FXSYS_HexCharToInt(), and PDFCharIsLineEnding().

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PDF_DataDecode()

std::optional< PDFDataDecodeResult > PDF_DataDecode	(	pdfium::span< const uint8_t >	src_span,
		uint32_t	last_estimated_size,
		bool	bImageAcc,
		const DecoderArray &	decoder_array )

Definition at line 429 of file fpdf_parser_decode.cpp.

References fxcodec::DataAndBytesConsumed::bytes_consumed, fxcrt::ByteString::operator=(), and fxcrt::ByteString::operator==().

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PDF_DecodeText()

WideString PDF_DecodeText

(

pdfium::span< const uint8_t >

span

)

Definition at line 520 of file fpdf_parser_decode.cpp.

References fxcrt::WideString::FromUTF8().

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PDF_EncodeString()

ByteString PDF_EncodeString

(

ByteStringView

src

)

Definition at line 592 of file fpdf_parser_decode.cpp.

References fxcrt::ByteString::operator+=(), and fxcrt::ByteString::operator+=().

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PDF_EncodeText()

ByteString PDF_EncodeText

(

WideStringView

str

)

Definition at line 547 of file fpdf_parser_decode.cpp.

References kPDFDocEncoding.

PDF_HexEncodeString()

ByteString PDF_HexEncodeString

(

ByteStringView

src

)

Definition at line 614 of file fpdf_parser_decode.cpp.

References fxcrt::ByteString::operator+=().

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RunLengthDecode()

DataAndBytesConsumed RunLengthDecode

(

pdfium::span< const uint8_t >

src_span

)

Definition at line 249 of file fpdf_parser_decode.cpp.

StripLanguageCodes()

size_t StripLanguageCodes ( pdfium::span< wchar_t > s, size_t n )

static

Definition at line 504 of file fpdf_parser_decode.cpp.

ValidateDecoderPipeline()

bool ValidateDecoderPipeline

(

const CPDF_Array *

pDecoders

)

Definition at line 91 of file fpdf_parser_decode.cpp.

Referenced by GetDecoderArray().

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Variable Documentation

kPDFDocEncoding

const std::array<uint16_t, 256> kPDFDocEncoding

Initial value:

= {
    0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008,
    0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011,
    0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x02d8, 0x02c7, 0x02c6,
    0x02d9, 0x02dd, 0x02db, 0x02da, 0x02dc, 0x0020, 0x0021, 0x0022, 0x0023,
    0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c,
    0x002d, 0x002e, 0x002f, 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035,
    0x0036, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e,
    0x003f, 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, 0x0050,
    0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059,
    0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, 0x0060, 0x0061, 0x0062,
    0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006a, 0x006b,
    0x006c, 0x006d, 0x006e, 0x006f, 0x0070, 0x0071, 0x0072, 0x0073, 0x0074,
    0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d,
    0x007e, 0x0000, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, 0x2013, 0x0192,
    0x2044, 0x2039, 0x203a, 0x2212, 0x2030, 0x201e, 0x201c, 0x201d, 0x2018,
    0x2019, 0x201a, 0x2122, 0xfb01, 0xfb02, 0x0141, 0x0152, 0x0160, 0x0178,
    0x017d, 0x0131, 0x0142, 0x0153, 0x0161, 0x017e, 0x0000, 0x20ac, 0x00a1,
    0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, 0x00a8, 0x00a9, 0x00aa,
    0x00ab, 0x00ac, 0x0000, 0x00ae, 0x00af, 0x00b0, 0x00b1, 0x00b2, 0x00b3,
    0x00b4, 0x00b5, 0x00b6, 0x00b7, 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc,
    0x00bd, 0x00be, 0x00bf, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5,
    0x00c6, 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
    0x00cf, 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
    0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, 0x00e0,
    0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, 0x00e8, 0x00e9,
    0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, 0x00f0, 0x00f1, 0x00f2,
    0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, 0x00f8, 0x00f9, 0x00fa, 0x00fb,
    0x00fc, 0x00fd, 0x00fe, 0x00ff}

Definition at line 60 of file fpdf_parser_decode.cpp.

Referenced by PDF_EncodeText(), and UnicodesForPredefinedCharSet().