Add CPDF_Type1Font::IsBase14Font() to replace GetBase14Font().

IsBase14Font() is what its only caller really needs. Also use it in
Load() which does the same check, and restructure Load() to have an
early return.

Change-Id: I1d051d10b80aa82bcf590c79169ffe29607b3c13
Reviewed-on: https://pdfium-review.googlesource.com/39970
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Nicolás Peña Moreno <npm@chromium.org>

core/fpdfapi/font/cpdf_font.cpp

diff --git a/core/fpdfapi/font/cpdf_font.cpp b/core/fpdfapi/font/cpdf_font.cpp
index f2aa4da..9b83733 100644
--- a/core/fpdfapi/font/cpdf_font.cpp
+++ b/core/fpdfapi/font/cpdf_font.cpp
@@ -346,9 +346,7 @@
     return false;
   if (m_pFontFile)
     return false;
-  if (AsType1Font()->GetBase14Font() < 0)
-    return false;
-  return true;
+  return AsType1Font()->IsBase14Font();
 }
 
 const char* CPDF_Font::GetAdobeCharName(

core/fpdfapi/font/cpdf_type1font.cpp

diff --git a/core/fpdfapi/font/cpdf_type1font.cpp b/core/fpdfapi/font/cpdf_type1font.cpp
index 9e2f4ef..44e6b3e 100644
--- a/core/fpdfapi/font/cpdf_type1font.cpp
+++ b/core/fpdfapi/font/cpdf_type1font.cpp
@@ -84,25 +84,25 @@
 
 bool CPDF_Type1Font::Load() {
   m_Base14Font = PDF_GetStandardFontName(&m_BaseFont);
-  if (m_Base14Font >= 0) {
-    const CPDF_Dictionary* pFontDesc =
-        m_pFontDict->GetDictFor("FontDescriptor");
-    if (pFontDesc && pFontDesc->KeyExist("Flags"))
-      m_Flags = pFontDesc->GetIntegerFor("Flags");
-    else
-      m_Flags = m_Base14Font >= 12 ? FXFONT_SYMBOLIC : FXFONT_NONSYMBOLIC;
+  if (!IsBase14Font())
+    return LoadCommon();
 
-    if (m_Base14Font < 4) {
-      for (int i = 0; i < 256; i++)
-        m_CharWidth[i] = 600;
-    }
-    if (m_Base14Font == 12)
-      m_BaseEncoding = PDFFONT_ENCODING_ADOBE_SYMBOL;
-    else if (m_Base14Font == 13)
-      m_BaseEncoding = PDFFONT_ENCODING_ZAPFDINGBATS;
-    else if (FontStyleIsNonSymbolic(m_Flags))
-      m_BaseEncoding = PDFFONT_ENCODING_STANDARD;
+  const CPDF_Dictionary* pFontDesc = m_pFontDict->GetDictFor("FontDescriptor");
+  if (pFontDesc && pFontDesc->KeyExist("Flags"))
+    m_Flags = pFontDesc->GetIntegerFor("Flags");
+  else
+    m_Flags = m_Base14Font >= 12 ? FXFONT_SYMBOLIC : FXFONT_NONSYMBOLIC;
+
+  if (m_Base14Font < 4) {
+    for (int i = 0; i < 256; i++)
+      m_CharWidth[i] = 600;
   }
+  if (m_Base14Font == 12)
+    m_BaseEncoding = PDFFONT_ENCODING_ADOBE_SYMBOL;
+  else if (m_Base14Font == 13)
+    m_BaseEncoding = PDFFONT_ENCODING_ZAPFDINGBATS;
+  else if (FontStyleIsNonSymbolic(m_Flags))
+    m_BaseEncoding = PDFFONT_ENCODING_STANDARD;
   return LoadCommon();
 }
 

core/fpdfapi/font/cpdf_type1font.h

diff --git a/core/fpdfapi/font/cpdf_type1font.h b/core/fpdfapi/font/cpdf_type1font.h
index eaabaae..cbcb9af 100644
--- a/core/fpdfapi/font/cpdf_type1font.h
+++ b/core/fpdfapi/font/cpdf_type1font.h
@@ -23,7 +23,7 @@
   int GlyphFromCharCodeExt(uint32_t charcode) override;
 #endif
 
-  int GetBase14Font() const { return m_Base14Font; }
+  bool IsBase14Font() const { return m_Base14Font >= 0; }
 
  private:
   // CPDF_Font: