Store the offset in the archive buffer

This Cl moves the implementation of the archive buffer behind an
IFX_ArchiveStream interface. The buffer holds the current offset and the
offset parameter is removed from the CPDF_Creator and various other
methods.

Change-Id: Ia54e803b58bbfb6ef03fec4a940d2c056d541356
Reviewed-on: https://pdfium-review.googlesource.com/5255
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/core/fxcrt/fx_stream.h b/core/fxcrt/fx_stream.h
index 9e3277720d..5237a7cb94 100644
--- a/core/fxcrt/fx_stream.h
+++ b/core/fxcrt/fx_stream.h
@@ -44,6 +44,14 @@ class IFX_WriteStream : virtual public CFX_Retainable {
   virtual bool WriteBlock(const void* pData, size_t size) = 0;
 };
 
+class IFX_ArchiveStream : public IFX_WriteStream {
+ public:
+  virtual bool WriteByte(uint8_t byte) = 0;
+  virtual bool WriteDWord(uint32_t i) = 0;
+  virtual bool WriteString(const CFX_ByteStringC& str) = 0;
+  virtual FX_FILESIZE CurrentOffset() const = 0;
+};
+
 class IFX_ReadStream : virtual public CFX_Retainable {
  public:
   virtual bool IsEOF() = 0;