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, 3 insertions, 10 deletions

diff --git a/core/fpdfapi/parser/cpdf_number.cpp b/core/fpdfapi/parser/cpdf_number.cpp
index 24665fff60..73d689fffe 100644
--- a/core/fpdfapi/parser/cpdf_number.cpp
+++ b/core/fpdfapi/parser/cpdf_number.cpp
@@ -56,14 +56,7 @@ CFX_ByteString CPDF_Number::GetString() const {
                     : CFX_ByteString::FormatFloat(m_Float);
 }
 
-bool CPDF_Number::WriteTo(CFX_FileBufferArchive* archive,
-                          FX_FILESIZE* offset) const {
-  if (archive->AppendString(" ") < 0)
-    return false;
-
-  int32_t len = archive->AppendString(GetString().AsStringC());
-  if (len < 0)
-    return false;
-  *offset += len + 1;
-  return true;
+bool CPDF_Number::WriteTo(IFX_ArchiveStream* archive) const {
+  return archive->WriteString(" ") &&
+         archive->WriteString(GetString().AsStringC());
 }