diff options
Diffstat (limited to 'core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp')
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp | 533 |
1 files changed, 533 insertions, 0 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp new file mode 100644 index 0000000000..74e81d40fd --- /dev/null +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp @@ -0,0 +1,533 @@ +// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "../../../include/fpdfapi/fpdf_parser.h"
+#include "../../../include/fpdfapi/fpdf_module.h"
+#include "../../../include/fxcodec/fx_codec.h"
+#include <limits.h>
+#define _STREAM_MAX_SIZE_ 20 * 1024 * 1024
+FX_DWORD _A85Decode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ dest_size = 0;
+ dest_buf = NULL;
+ if (src_size == 0) {
+ return 0;
+ }
+ FX_DWORD orig_size = dest_size;
+ FX_DWORD zcount = 0;
+ FX_DWORD pos = 0;
+ while (pos < src_size) {
+ FX_BYTE ch = src_buf[pos];
+ if (ch < '!' && ch != '\n' && ch != '\r' && ch != ' ' && ch != '\t') {
+ break;
+ }
+ if (ch == 'z') {
+ zcount ++;
+ } else if (ch > 'u') {
+ break;
+ }
+ pos ++;
+ }
+ if (pos == 0) {
+ return 0;
+ }
+ if (zcount > UINT_MAX / 4) {
+ return (FX_DWORD) - 1;
+ }
+ if (zcount * 4 > UINT_MAX - (pos - zcount)) {
+ return (FX_DWORD) - 1;
+ }
+ dest_buf = FX_Alloc(FX_BYTE, zcount * 4 + (pos - zcount));
+ if (dest_buf == NULL) {
+ return (FX_DWORD) - 1;
+ }
+ int state = 0, res = 0;
+ pos = dest_size = 0;
+ while (pos < src_size) {
+ FX_BYTE ch = src_buf[pos++];
+ if (ch == '\n' || ch == '\r' || ch == ' ' || ch == '\t') {
+ continue;
+ }
+ if (ch == 'z') {
+ FXSYS_memset32(dest_buf + dest_size, 0, 4);
+ state = 0;
+ res = 0;
+ dest_size += 4;
+ } else {
+ if (ch < '!' || ch > 'u') {
+ break;
+ }
+ res = res * 85 + ch - 33;
+ state ++;
+ if (state == 5) {
+ for (int i = 0; i < 4; i ++) {
+ dest_buf[dest_size++] = (FX_BYTE)(res >> (3 - i) * 8);
+ }
+ state = 0;
+ res = 0;
+ }
+ }
+ }
+ if (state) {
+ int i;
+ for (i = state; i < 5; i ++) {
+ res = res * 85 + 84;
+ }
+ for (i = 0; i < state - 1; i ++) {
+ dest_buf[dest_size++] = (FX_BYTE)(res >> (3 - i) * 8);
+ }
+ }
+ if (pos < src_size && src_buf[pos] == '>') {
+ pos ++;
+ }
+ return pos;
+}
+FX_DWORD _HexDecode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ FX_DWORD orig_size = dest_size;
+ FX_DWORD i;
+ for (i = 0; i < src_size; i ++)
+ if (src_buf[i] == '>') {
+ break;
+ }
+ dest_buf = FX_Alloc( FX_BYTE, i / 2 + 1);
+ dest_size = 0;
+ FX_BOOL bFirstDigit = TRUE;
+ for (i = 0; i < src_size; i ++) {
+ FX_BYTE ch = src_buf[i];
+ if (ch == ' ' || ch == '\n' || ch == '\t' || ch == '\r') {
+ continue;
+ }
+ int digit;
+ if (ch <= '9' && ch >= '0') {
+ digit = ch - '0';
+ } else if (ch <= 'f' && ch >= 'a') {
+ digit = ch - 'a' + 10;
+ } else if (ch <= 'F' && ch >= 'A') {
+ digit = ch - 'A' + 10;
+ } else if (ch == '>') {
+ i ++;
+ break;
+ } else {
+ continue;
+ }
+ if (bFirstDigit) {
+ dest_buf[dest_size] = digit * 16;
+ } else {
+ dest_buf[dest_size ++] += digit;
+ }
+ bFirstDigit = !bFirstDigit;
+ }
+ if (!bFirstDigit) {
+ dest_size ++;
+ }
+ return i;
+}
+FX_DWORD RunLengthDecode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ FX_DWORD orig_size = dest_size;
+ FX_DWORD i = 0;
+ FX_DWORD old;
+ dest_size = 0;
+ while (i < src_size) {
+ if (src_buf[i] < 128) {
+ old = dest_size;
+ dest_size += src_buf[i] + 1;
+ if (dest_size < old) {
+ return (FX_DWORD) - 1;
+ }
+ i += src_buf[i] + 2;
+ } else if (src_buf[i] > 128) {
+ old = dest_size;
+ dest_size += 257 - src_buf[i];
+ if (dest_size < old) {
+ return (FX_DWORD) - 1;
+ }
+ i += 2;
+ } else {
+ break;
+ }
+ }
+ if (dest_size >= _STREAM_MAX_SIZE_) {
+ return -1;
+ }
+ dest_buf = FX_Alloc( FX_BYTE, dest_size);
+ if (!dest_buf) {
+ return -1;
+ }
+ i = 0;
+ int dest_count = 0;
+ while (i < src_size) {
+ if (src_buf[i] < 128) {
+ FX_DWORD copy_len = src_buf[i] + 1;
+ FX_DWORD buf_left = src_size - i - 1;
+ if (buf_left < copy_len) {
+ FX_DWORD delta = copy_len - buf_left;
+ copy_len = buf_left;
+ FXSYS_memset8(dest_buf + dest_count + copy_len, '\0', delta);
+ }
+ FXSYS_memcpy32(dest_buf + dest_count, src_buf + i + 1, copy_len);
+ dest_count += src_buf[i] + 1;
+ i += src_buf[i] + 2;
+ } else if (src_buf[i] > 128) {
+ int fill = 0;
+ if (i < src_size - 1) {
+ fill = src_buf[i + 1];
+ }
+ FXSYS_memset8(dest_buf + dest_count, fill, 257 - src_buf[i]);
+ dest_count += 257 - src_buf[i];
+ i += 2;
+ } else {
+ break;
+ }
+ }
+ FX_DWORD ret = i + 1;
+ if (ret > src_size) {
+ ret = src_size;
+ }
+ return ret;
+}
+ICodec_ScanlineDecoder* FPDFAPI_CreateFaxDecoder(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height,
+ const CPDF_Dictionary* pParams)
+{
+ int K = 0;
+ FX_BOOL EndOfLine = FALSE;
+ FX_BOOL ByteAlign = FALSE;
+ FX_BOOL BlackIs1 = FALSE;
+ FX_BOOL Columns = 1728;
+ FX_BOOL Rows = 0;
+ if (pParams) {
+ K = pParams->GetInteger(FX_BSTRC("K"));
+ EndOfLine = pParams->GetInteger(FX_BSTRC("EndOfLine"));
+ ByteAlign = pParams->GetInteger(FX_BSTRC("EncodedByteAlign"));
+ BlackIs1 = pParams->GetInteger(FX_BSTRC("BlackIs1"));
+ Columns = pParams->GetInteger(FX_BSTRC("Columns"), 1728);
+ Rows = pParams->GetInteger(FX_BSTRC("Rows"));
+ if (Rows > USHRT_MAX) {
+ Rows = 0;
+ }
+ if (Columns <= 0 || Rows < 0 || Columns > USHRT_MAX || Rows > USHRT_MAX) {
+ return NULL;
+ }
+ }
+ return CPDF_ModuleMgr::Get()->GetFaxModule()->CreateDecoder(src_buf, src_size, width, height,
+ K, EndOfLine, ByteAlign, BlackIs1, Columns, Rows);
+}
+static FX_BOOL CheckFlateDecodeParams(int Colors, int BitsPerComponent, int Columns)
+{
+ if (Columns < 0) {
+ return FALSE;
+ }
+ int check = Columns;
+ if (Colors < 0 || (check > 0 && Colors > INT_MAX / check)) {
+ return FALSE;
+ }
+ check *= Colors;
+ if (BitsPerComponent < 0 ||
+ (check > 0 && BitsPerComponent > INT_MAX / check)) {
+ return FALSE;
+ }
+ check *= BitsPerComponent;
+ if (check > INT_MAX - 7) {
+ return FALSE;
+ }
+ return TRUE;
+}
+ICodec_ScanlineDecoder* FPDFAPI_CreateFlateDecoder(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height,
+ int nComps, int bpc, const CPDF_Dictionary* pParams)
+{
+ int predictor = 0;
+ FX_BOOL bEarlyChange = TRUE;
+ int Colors = 0, BitsPerComponent = 0, Columns = 0;
+ if (pParams) {
+ predictor = ((CPDF_Dictionary*)pParams)->GetInteger(FX_BSTRC("Predictor"));
+ bEarlyChange = ((CPDF_Dictionary*)pParams)->GetInteger(FX_BSTRC("EarlyChange"), 1);
+ Colors = pParams->GetInteger(FX_BSTRC("Colors"), 1);
+ BitsPerComponent = pParams->GetInteger(FX_BSTRC("BitsPerComponent"), 8);
+ Columns = pParams->GetInteger(FX_BSTRC("Columns"), 1);
+ if (!CheckFlateDecodeParams(Colors, BitsPerComponent, Columns)) {
+ return NULL;
+ }
+ }
+ return CPDF_ModuleMgr::Get()->GetFlateModule()->CreateDecoder(src_buf, src_size, width, height,
+ nComps, bpc, predictor, Colors, BitsPerComponent, Columns);
+}
+FX_DWORD FPDFAPI_FlateOrLZWDecode(FX_BOOL bLZW, const FX_BYTE* src_buf, FX_DWORD src_size, CPDF_Dictionary* pParams,
+ FX_DWORD estimated_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ int predictor = 0;
+ FX_BOOL bEarlyChange = TRUE;
+ int Colors = 0, BitsPerComponent = 0, Columns = 0;
+ if (pParams) {
+ predictor = ((CPDF_Dictionary*)pParams)->GetInteger(FX_BSTRC("Predictor"));
+ bEarlyChange = ((CPDF_Dictionary*)pParams)->GetInteger(FX_BSTRC("EarlyChange"), 1);
+ Colors = pParams->GetInteger(FX_BSTRC("Colors"), 1);
+ BitsPerComponent = pParams->GetInteger(FX_BSTRC("BitsPerComponent"), 8);
+ Columns = pParams->GetInteger(FX_BSTRC("Columns"), 1);
+ if (!CheckFlateDecodeParams(Colors, BitsPerComponent, Columns)) {
+ return (FX_DWORD) - 1;
+ }
+ }
+ return CPDF_ModuleMgr::Get()->GetFlateModule()->FlateOrLZWDecode(bLZW, src_buf, src_size,
+ bEarlyChange, predictor, Colors, BitsPerComponent, Columns, estimated_size,
+ dest_buf, dest_size);
+}
+FX_BOOL PDF_DataDecode(FX_LPCBYTE src_buf, FX_DWORD src_size, const CPDF_Dictionary* pDict,
+ FX_LPBYTE& dest_buf, FX_DWORD& dest_size, CFX_ByteString& ImageEncoding,
+ CPDF_Dictionary*& pImageParms, FX_DWORD last_estimated_size, FX_BOOL bImageAcc)
+
+{
+ CPDF_Object* pDecoder = pDict->GetElementValue(FX_BSTRC("Filter"));
+ if (pDecoder == NULL || (pDecoder->GetType() != PDFOBJ_ARRAY && pDecoder->GetType() != PDFOBJ_NAME)) {
+ return FALSE;
+ }
+ CPDF_Object* pParams = pDict->GetElementValue(FX_BSTRC("DecodeParms"));
+ CFX_ByteStringArray DecoderList;
+ CFX_PtrArray ParamList;
+ if (pDecoder->GetType() == PDFOBJ_ARRAY) {
+ if (pParams && pParams->GetType() != PDFOBJ_ARRAY) {
+ pParams = NULL;
+ }
+ CPDF_Array* pDecoders = (CPDF_Array*)pDecoder;
+ for (FX_DWORD i = 0; i < pDecoders->GetCount(); i ++) {
+ CFX_ByteStringC str = pDecoders->GetConstString(i);
+ DecoderList.Add(str);
+ if (pParams) {
+ ParamList.Add(((CPDF_Array*)pParams)->GetDict(i));
+ } else {
+ ParamList.Add(NULL);
+ }
+ }
+ } else {
+ DecoderList.Add(pDecoder->GetConstString());
+ ParamList.Add(pParams->GetDict());
+ }
+ FX_LPBYTE last_buf = (FX_LPBYTE)src_buf;
+ FX_DWORD last_size = src_size;
+ for (int i = 0; i < DecoderList.GetSize(); i ++) {
+ int estimated_size = i == DecoderList.GetSize() - 1 ? last_estimated_size : 0;
+ CFX_ByteString decoder = DecoderList[i];
+ CPDF_Dictionary* pParam = (CPDF_Dictionary*)ParamList[i];
+ FX_LPBYTE new_buf = NULL;
+ FX_DWORD new_size = (FX_DWORD) - 1;
+ int offset = -1;
+ if (decoder == FX_BSTRC("FlateDecode") || decoder == FX_BSTRC("Fl")) {
+ if (bImageAcc && i == DecoderList.GetSize() - 1) {
+ ImageEncoding = FX_BSTRC("FlateDecode");
+ dest_buf = (FX_LPBYTE)last_buf;
+ dest_size = last_size;
+ pImageParms = pParam;
+ return TRUE;
+ } else {
+ offset = FPDFAPI_FlateOrLZWDecode(FALSE, last_buf, last_size, pParam, estimated_size, new_buf, new_size);
+ }
+ } else if (decoder == FX_BSTRC("LZWDecode") || decoder == FX_BSTRC("LZW")) {
+ offset = FPDFAPI_FlateOrLZWDecode(TRUE, last_buf, last_size, pParam, estimated_size, new_buf, new_size);
+ } else if (decoder == FX_BSTRC("ASCII85Decode") || decoder == FX_BSTRC("A85")) {
+ offset = _A85Decode(last_buf, last_size, new_buf, new_size);
+ } else if (decoder == FX_BSTRC("ASCIIHexDecode") || decoder == FX_BSTRC("AHx")) {
+ offset = _HexDecode(last_buf, last_size, new_buf, new_size);
+ } else if (decoder == FX_BSTRC("RunLengthDecode") || decoder == FX_BSTRC("RL")) {
+ if (bImageAcc && i == DecoderList.GetSize() - 1) {
+ ImageEncoding = FX_BSTRC("RunLengthDecode");
+ dest_buf = (FX_LPBYTE)last_buf;
+ dest_size = last_size;
+ pImageParms = pParam;
+ return TRUE;
+ }
+ offset = RunLengthDecode(last_buf, last_size, new_buf, new_size);
+ } else {
+ if (decoder == FX_BSTRC("DCT")) {
+ decoder = "DCTDecode";
+ } else if (decoder == FX_BSTRC("CCF")) {
+ decoder = "CCITTFaxDecode";
+ } else if (decoder == FX_BSTRC("Crypt")) {
+ continue;
+ }
+ ImageEncoding = decoder;
+ pImageParms = pParam;
+ dest_buf = (FX_LPBYTE)last_buf;
+ dest_size = last_size;
+ return TRUE;
+ }
+ if (last_buf != src_buf) {
+ FX_Free(last_buf);
+ }
+ if (offset == -1) {
+ return FALSE;
+ }
+ last_buf = new_buf;
+ last_size = new_size;
+ }
+ ImageEncoding = "";
+ pImageParms = NULL;
+ dest_buf = last_buf;
+ dest_size = last_size;
+ return TRUE;
+}
+extern const FX_WORD PDFDocEncoding[256] = {
+ 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
+};
+CFX_WideString PDF_DecodeText(FX_LPCBYTE src_data, FX_DWORD src_len, CFX_CharMap* pCharMap)
+{
+ CFX_WideString result;
+ if (src_len >= 2 && ((src_data[0] == 0xfe && src_data[1] == 0xff) || (src_data[0] == 0xff && src_data[1] == 0xfe))) {
+ FX_BOOL bBE = src_data[0] == 0xfe;
+ int max_chars = (src_len - 2) / 2;
+ if (!max_chars) {
+ return result;
+ }
+ if (src_data[0] == 0xff) {
+ bBE = !src_data[2];
+ }
+ FX_LPWSTR dest_buf = result.GetBuffer(max_chars);
+ FX_LPCBYTE uni_str = src_data + 2;
+ int dest_pos = 0;
+ for (int i = 0; i < max_chars * 2; i += 2) {
+ FX_WORD unicode = bBE ? (uni_str[i] << 8 | uni_str[i + 1]) : (uni_str[i + 1] << 8 | uni_str[i]);
+ if (unicode == 0x1b) {
+ i += 2;
+ while (i < max_chars * 2) {
+ FX_WORD unicode = bBE ? (uni_str[i] << 8 | uni_str[i + 1]) : (uni_str[i + 1] << 8 | uni_str[i]);
+ i += 2;
+ if (unicode == 0x1b) {
+ break;
+ }
+ }
+ } else {
+ dest_buf[dest_pos++] = unicode;
+ }
+ }
+ result.ReleaseBuffer(dest_pos);
+ } else if (pCharMap == NULL) {
+ FX_LPWSTR dest_buf = result.GetBuffer(src_len);
+ for (FX_DWORD i = 0; i < src_len; i ++) {
+ dest_buf[i] = PDFDocEncoding[src_data[i]];
+ }
+ result.ReleaseBuffer(src_len);
+ } else {
+ return (*pCharMap->m_GetWideString)(pCharMap, CFX_ByteString((FX_LPCSTR)src_data, src_len));
+ }
+ return result;
+}
+CFX_WideString PDF_DecodeText(const CFX_ByteString& bstr, CFX_CharMap* pCharMap)
+{
+ return PDF_DecodeText((FX_LPCBYTE)(FX_LPCSTR)bstr, bstr.GetLength(), pCharMap);
+}
+CFX_ByteString PDF_EncodeText(FX_LPCWSTR pString, int len, CFX_CharMap* pCharMap)
+{
+ if (len == -1) {
+ len = (FX_STRSIZE)FXSYS_wcslen(pString);
+ }
+ CFX_ByteString result;
+ if (pCharMap == NULL) {
+ FX_LPSTR dest_buf1 = result.GetBuffer(len);
+ int i;
+ for (i = 0; i < len; i ++) {
+ int code;
+ for (code = 0; code < 256; code ++)
+ if (PDFDocEncoding[code] == pString[i]) {
+ break;
+ }
+ if (code == 256) {
+ break;
+ }
+ dest_buf1[i] = code;
+ }
+ result.ReleaseBuffer(i);
+ if (i == len) {
+ return result;
+ }
+ }
+ FX_LPBYTE dest_buf2 = (FX_LPBYTE)result.GetBuffer(len * 2 + 2);
+ dest_buf2[0] = 0xfe;
+ dest_buf2[1] = 0xff;
+ dest_buf2 += 2;
+ for (int i = 0; i < len; i ++) {
+ *dest_buf2++ = pString[i] >> 8;
+ *dest_buf2++ = (FX_BYTE)pString[i];
+ }
+ result.ReleaseBuffer(len * 2 + 2);
+ return result;
+}
+CFX_ByteString PDF_EncodeString(const CFX_ByteString& src, FX_BOOL bHex)
+{
+ CFX_ByteTextBuf result;
+ int srclen = src.GetLength();
+ if (bHex) {
+ result.AppendChar('<');
+ for (int i = 0; i < srclen; i ++) {
+ result.AppendChar("0123456789ABCDEF"[src[i] / 16]);
+ result.AppendChar("0123456789ABCDEF"[src[i] % 16]);
+ }
+ result.AppendChar('>');
+ return result.GetByteString();
+ }
+ result.AppendChar('(');
+ for (int i = 0; i < srclen; i ++) {
+ FX_BYTE ch = src[i];
+ if (ch == ')' || ch == '\\' || ch == '(') {
+ result.AppendChar('\\');
+ } else if (ch == 0x0a) {
+ result << FX_BSTRC("\\n");
+ continue;
+ } else if (ch == 0x0d) {
+ result << FX_BSTRC("\\r");
+ continue;
+ }
+ result.AppendChar(ch);
+ }
+ result.AppendChar(')');
+ return result.GetByteString();
+}
+void FlateEncode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule();
+ if (pEncoders) {
+ pEncoders->GetFlateModule()->Encode(src_buf, src_size, dest_buf, dest_size);
+ }
+}
+void FlateEncode(FX_LPCBYTE src_buf, FX_DWORD src_size, int predictor, int Colors, int BitsPerComponent, int Columns,
+ FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule();
+ if (pEncoders) {
+ pEncoders->GetFlateModule()->Encode(src_buf, src_size, predictor, Colors, BitsPerComponent, Columns, dest_buf, dest_size);
+ }
+}
+FX_DWORD FlateDecode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule();
+ if (pEncoders) {
+ return pEncoders->GetFlateModule()->FlateOrLZWDecode(FALSE, src_buf, src_size, FALSE, 0, 0, 0, 0, 0, dest_buf, dest_size);
+ }
+ return 0;
+}
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