Rename local variables in CPDF_StreamParser::ReadInlineStream()

Use Google C++ names.

Bug: 42271580
Change-Id: I8905924aba9ef4895785528ba34981453176bef7
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/127852
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Thomas Sepez <tsepez@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>

core/fpdfapi/page/cpdf_streamparser.cpp

diff --git a/core/fpdfapi/page/cpdf_streamparser.cpp b/core/fpdfapi/page/cpdf_streamparser.cpp
index 2141d2f..9629663 100644
--- a/core/fpdfapi/page/cpdf_streamparser.cpp
+++ b/core/fpdfapi/page/cpdf_streamparser.cpp
@@ -135,26 +135,29 @@
     CPDF_Document* pDoc,
     RetainPtr<CPDF_Dictionary> pDict,
     const CPDF_Object* pCSObj) {
-  if (m_Pos < m_pBuf.size() && PDFCharIsWhitespace(m_pBuf[m_Pos]))
+  if (m_Pos < m_pBuf.size() && PDFCharIsWhitespace(m_pBuf[m_Pos])) {
     m_Pos++;
+  }
 
-  if (m_Pos == m_pBuf.size())
+  if (m_Pos == m_pBuf.size()) {
     return nullptr;
+  }
 
   ByteString decoder;
-  RetainPtr<const CPDF_Dictionary> pParam;
-  RetainPtr<const CPDF_Object> pFilter = pDict->GetDirectObjectFor("Filter");
-  if (pFilter) {
-    const CPDF_Array* pArray = pFilter->AsArray();
-    if (pArray) {
-      decoder = pArray->GetByteStringAt(0);
-      RetainPtr<const CPDF_Array> pParams =
+  RetainPtr<const CPDF_Dictionary> param_dict;
+  RetainPtr<const CPDF_Object> filter = pDict->GetDirectObjectFor("Filter");
+  if (filter) {
+    const CPDF_Array* array = filter->AsArray();
+    if (array) {
+      decoder = array->GetByteStringAt(0);
+      RetainPtr<const CPDF_Array> params =
           pDict->GetArrayFor(pdfium::stream::kDecodeParms);
-      if (pParams)
-        pParam = pParams->GetDictAt(0);
+      if (params) {
+        param_dict = params->GetDictAt(0);
+      }
     } else {
-      decoder = pFilter->GetString();
-      pParam = pDict->GetDictFor(pdfium::stream::kDecodeParms);
+      decoder = filter->GetString();
+      param_dict = pDict->GetDictFor(pdfium::stream::kDecodeParms);
     }
   }
   uint32_t width = pDict->GetIntegerFor("Width");
@@ -169,54 +172,58 @@
   }
   std::optional<uint32_t> maybe_size =
       fxge::CalculatePitch8(bpc, nComponents, width);
-  if (!maybe_size.has_value())
+  if (!maybe_size.has_value()) {
     return nullptr;
+  }
 
   FX_SAFE_UINT32 size = maybe_size.value();
   size *= height;
-  if (!size.IsValid())
+  if (!size.IsValid()) {
     return nullptr;
+  }
 
-  uint32_t dwOrigSize = size.ValueOrDie();
+  uint32_t original_size = size.ValueOrDie();
   DataVector<uint8_t> data;
-  uint32_t dwStreamSize;
+  uint32_t stream_size;
   if (decoder.IsEmpty()) {
-    dwOrigSize = std::min<uint32_t>(dwOrigSize, m_pBuf.size() - m_Pos);
-    auto src_span = m_pBuf.subspan(m_Pos, dwOrigSize);
+    original_size = std::min<uint32_t>(original_size, m_pBuf.size() - m_Pos);
+    auto src_span = m_pBuf.subspan(m_Pos, original_size);
     data = DataVector<uint8_t>(src_span.begin(), src_span.end());
-    dwStreamSize = dwOrigSize;
-    m_Pos += dwOrigSize;
+    stream_size = original_size;
+    m_Pos += original_size;
   } else {
-    dwStreamSize = DecodeInlineStream(m_pBuf.subspan(m_Pos), width, height,
-                                      decoder, std::move(pParam), dwOrigSize);
-    if (!pdfium::IsValueInRangeForNumericType<int>(dwStreamSize)) {
+    stream_size =
+        DecodeInlineStream(m_pBuf.subspan(m_Pos), width, height, decoder,
+                           std::move(param_dict), original_size);
+    if (!pdfium::IsValueInRangeForNumericType<int>(stream_size)) {
       return nullptr;
     }
 
-    uint32_t dwSavePos = m_Pos;
-    m_Pos += dwStreamSize;
+    uint32_t saved_position = m_Pos;
+    m_Pos += stream_size;
     while (true) {
-      uint32_t dwPrevPos = m_Pos;
+      uint32_t saved_iteration_position = m_Pos;
       ElementType type = ParseNextElement();
-      if (type == ElementType::kEndOfData)
+      if (type == ElementType::kEndOfData) {
         break;
+      }
 
       if (type != ElementType::kKeyword) {
-        dwStreamSize += m_Pos - dwPrevPos;
+        stream_size += m_Pos - saved_iteration_position;
         continue;
       }
       if (GetWord() == "EI") {
-        m_Pos = dwPrevPos;
+        m_Pos = saved_iteration_position;
         break;
       }
-      dwStreamSize += m_Pos - dwPrevPos;
+      stream_size += m_Pos - saved_iteration_position;
     }
-    m_Pos = dwSavePos;
-    auto src_span = m_pBuf.subspan(m_Pos, dwStreamSize);
+    m_Pos = saved_position;
+    auto src_span = m_pBuf.subspan(m_Pos, stream_size);
     data = DataVector<uint8_t>(src_span.begin(), src_span.end());
-    m_Pos += dwStreamSize;
+    m_Pos += stream_size;
   }
-  pDict->SetNewFor<CPDF_Number>("Length", static_cast<int>(dwStreamSize));
+  pDict->SetNewFor<CPDF_Number>("Length", static_cast<int>(stream_size));
   return pdfium::MakeRetain<CPDF_Stream>(std::move(data), std::move(pDict));
 }