| // Copyright 2016 The PDFium Authors |
| // 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 |
| |
| #ifndef CORE_FPDFAPI_PARSER_FPDF_PARSER_UTILITY_H_ |
| #define CORE_FPDFAPI_PARSER_FPDF_PARSER_UTILITY_H_ |
| |
| #include <iosfwd> |
| #include <vector> |
| |
| #include "core/fxcrt/bytestring.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "third_party/abseil-cpp/absl/types/optional.h" |
| |
| class CPDF_Array; |
| class CPDF_Dictionary; |
| class CPDF_Object; |
| class IFX_SeekableReadStream; |
| |
| // Use the accessors below instead of directly accessing kPDFCharTypes. |
| extern const char kPDFCharTypes[256]; |
| |
| inline bool PDFCharIsWhitespace(uint8_t c) { |
| return kPDFCharTypes[c] == 'W'; |
| } |
| inline bool PDFCharIsNumeric(uint8_t c) { |
| return kPDFCharTypes[c] == 'N'; |
| } |
| inline bool PDFCharIsDelimiter(uint8_t c) { |
| return kPDFCharTypes[c] == 'D'; |
| } |
| inline bool PDFCharIsOther(uint8_t c) { |
| return kPDFCharTypes[c] == 'R'; |
| } |
| |
| inline bool PDFCharIsLineEnding(uint8_t c) { |
| return c == '\r' || c == '\n'; |
| } |
| |
| // On success, return a positive offset value to the PDF header. If the header |
| // cannot be found, or if there is an error reading from |pFile|, then return |
| // nullopt. |
| absl::optional<FX_FILESIZE> GetHeaderOffset( |
| const RetainPtr<IFX_SeekableReadStream>& pFile); |
| |
| ByteString PDF_NameDecode(ByteStringView orig); |
| ByteString PDF_NameEncode(const ByteString& orig); |
| |
| // Return |nCount| elements from |pArray| as a vector of floats. |pArray| must |
| // have at least |nCount| elements. |
| std::vector<float> ReadArrayElementsToVector(const CPDF_Array* pArray, |
| size_t nCount); |
| |
| // Returns true if |dict| is non-null and has a /Type name entry that matches |
| // |type|. |
| bool ValidateDictType(const CPDF_Dictionary* dict, ByteStringView type); |
| |
| // Returns true if |dict| is non-null and all entries in |dict| are dictionaries |
| // of |type|. |
| bool ValidateDictAllResourcesOfType(const CPDF_Dictionary* dict, |
| ByteStringView type); |
| |
| // Shorthand for ValidateDictAllResourcesOfType(dict, "Font"). |
| bool ValidateFontResourceDict(const CPDF_Dictionary* dict); |
| |
| // Like ValidateDictType(), but /Type can also not exist. |
| bool ValidateDictOptionalType(const CPDF_Dictionary* dict, ByteStringView type); |
| |
| std::ostream& operator<<(std::ostream& buf, const CPDF_Object* pObj); |
| |
| #endif // CORE_FPDFAPI_PARSER_FPDF_PARSER_UTILITY_H_ |