Fix two issues shown by bug 489995
[pdfium.git] / fpdfsdk / src / fpdfdoc.cpp
index e264069..5d2469c 100644 (file)
 #include "../include/fsdk_define.h"
 #include "../../public/fpdf_doc.h"
 
-static int THISMODULE = 0;
+namespace {
 
-static CPDF_Bookmark FindBookmark(const CPDF_BookmarkTree& tree, CPDF_Bookmark bookmark, const CFX_WideString& title)
-{
-    if (bookmark && bookmark.GetTitle().CompareNoCase(title.c_str()) == 0) {
-        // First check this item
-        return bookmark;
-    }
-    // go into children items
-    CPDF_Bookmark child = tree.GetFirstChild(bookmark);
-    while (child) {
-        // check if this item
-        CPDF_Bookmark found = FindBookmark(tree, child, title);
-        if (found)
-            return found;
-        child = tree.GetNextSibling(child);
-    }
-    return CPDF_Bookmark();
+int THISMODULE = 0;
+
+CPDF_Bookmark FindBookmark(const CPDF_BookmarkTree& tree,
+                           CPDF_Bookmark bookmark,
+                           const CFX_WideString& title) {
+  if (bookmark && bookmark.GetTitle().CompareNoCase(title.c_str()) == 0) {
+    // First check this item
+    return bookmark;
+  }
+  // go into children items
+  CPDF_Bookmark child = tree.GetFirstChild(bookmark);
+  while (child) {
+    // check if this item
+    CPDF_Bookmark found = FindBookmark(tree, child, title);
+    if (found)
+      return found;
+    child = tree.GetNextSibling(child);
+  }
+  return CPDF_Bookmark();
 }
 
-DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict)
-{
-    if (!document)
-        return NULL;
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_BookmarkTree tree(pDoc);
-    CPDF_Bookmark bookmark = CPDF_Bookmark((CPDF_Dictionary*)pDict);
-    return tree.GetFirstChild(bookmark).GetDict();
+void ReleaseLinkList(void* data) {
+  delete (CPDF_LinkList*)data;
 }
 
-DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_GetNextSibling(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict)
-{
-    if (!document || !pDict)
-        return NULL;
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_BookmarkTree tree(pDoc);
-    CPDF_Bookmark bookmark = CPDF_Bookmark((CPDF_Dictionary*)pDict);
-    return tree.GetNextSibling(bookmark).GetDict();
+CPDF_LinkList* GetLinkList(CPDF_Page* page) {
+  if (!page)
+    return nullptr;
+
+  // Link list is stored with the document
+  CPDF_Document* pDoc = page->m_pDocument;
+  CPDF_LinkList* pLinkList = (CPDF_LinkList*)pDoc->GetPrivateData(&THISMODULE);
+  if (!pLinkList) {
+    pLinkList = new CPDF_LinkList;
+    pDoc->SetPrivateData(&THISMODULE, pLinkList, ReleaseLinkList);
+  }
+  return pLinkList;
 }
 
-DLLEXPORT unsigned long STDCALL FPDFBookmark_GetTitle(FPDF_BOOKMARK pDict, void* buffer, unsigned long buflen)
-{
-    if (!pDict)
-        return 0;
-    CPDF_Bookmark bookmark((CPDF_Dictionary*)pDict);
-    CFX_WideString title = bookmark.GetTitle();
-    CFX_ByteString encodedTitle = title.UTF16LE_Encode();
-    unsigned long len = encodedTitle.GetLength();
-    if (buffer && buflen >= len) {
-        FXSYS_memcpy(buffer, encodedTitle.c_str(), len);
-    }
-    return len;
+}  // namespace
+
+DLLEXPORT FPDF_BOOKMARK STDCALL
+FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict) {
+  if (!document)
+    return NULL;
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_BookmarkTree tree(pDoc);
+  CPDF_Bookmark bookmark = CPDF_Bookmark((CPDF_Dictionary*)pDict);
+  return tree.GetFirstChild(bookmark).GetDict();
 }
 
-DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_Find(FPDF_DOCUMENT document, FPDF_WIDESTRING title)
-{
-    if (!document)
-        return NULL;
-    if (!title || title[0] == 0)
-        return NULL;
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_BookmarkTree tree(pDoc);
-    FX_STRSIZE len = CFX_WideString::WStringLength(title);
-    CFX_WideString encodedTitle = CFX_WideString::FromUTF16LE(title, len);
-    return FindBookmark(tree, CPDF_Bookmark(), encodedTitle).GetDict();
+DLLEXPORT FPDF_BOOKMARK STDCALL
+FPDFBookmark_GetNextSibling(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict) {
+  if (!document || !pDict)
+    return NULL;
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_BookmarkTree tree(pDoc);
+  CPDF_Bookmark bookmark = CPDF_Bookmark((CPDF_Dictionary*)pDict);
+  return tree.GetNextSibling(bookmark).GetDict();
 }
 
-DLLEXPORT FPDF_DEST STDCALL FPDFBookmark_GetDest(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict)
-{
-    if (!document)
-        return NULL;
-    if (!pDict)
-        return NULL;
-    CPDF_Bookmark bookmark((CPDF_Dictionary*)pDict);
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_Dest dest = bookmark.GetDest(pDoc);
-    if (dest)
-        return dest.GetObject();
-    // If this bookmark is not directly associated with a dest, we try to get action
-    CPDF_Action action = bookmark.GetAction();
-    if (!action)
-        return NULL;
-    return action.GetDest(pDoc).GetObject();
+DLLEXPORT unsigned long STDCALL FPDFBookmark_GetTitle(FPDF_BOOKMARK pDict,
+                                                      void* buffer,
+                                                      unsigned long buflen) {
+  if (!pDict)
+    return 0;
+  CPDF_Bookmark bookmark((CPDF_Dictionary*)pDict);
+  CFX_WideString title = bookmark.GetTitle();
+  CFX_ByteString encodedTitle = title.UTF16LE_Encode();
+  unsigned long len = encodedTitle.GetLength();
+  if (buffer && buflen >= len) {
+    FXSYS_memcpy(buffer, encodedTitle.c_str(), len);
+  }
+  return len;
 }
 
-DLLEXPORT FPDF_ACTION STDCALL FPDFBookmark_GetAction(FPDF_BOOKMARK pDict)
-{
-    if (!pDict)
-        return NULL;
-    CPDF_Bookmark bookmark((CPDF_Dictionary*)pDict);
-    return bookmark.GetAction().GetDict();
+DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_Find(FPDF_DOCUMENT document,
+                                                  FPDF_WIDESTRING title) {
+  if (!document)
+    return NULL;
+  if (!title || title[0] == 0)
+    return NULL;
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_BookmarkTree tree(pDoc);
+  FX_STRSIZE len = CFX_WideString::WStringLength(title);
+  CFX_WideString encodedTitle = CFX_WideString::FromUTF16LE(title, len);
+  return FindBookmark(tree, CPDF_Bookmark(), encodedTitle).GetDict();
 }
 
-DLLEXPORT unsigned long STDCALL FPDFAction_GetType(FPDF_ACTION pDict)
-{
-    if (!pDict)
-        return 0;
-    CPDF_Action action((CPDF_Dictionary*)pDict);
-    CPDF_Action::ActionType type = action.GetType();
-    switch (type) {
-        case CPDF_Action::GoTo:
-            return PDFACTION_GOTO;
-        case CPDF_Action::GoToR:
-            return PDFACTION_REMOTEGOTO;
-        case CPDF_Action::URI:
-            return PDFACTION_URI;
-        case CPDF_Action::Launch:
-            return PDFACTION_LAUNCH;
-        default:
-            return PDFACTION_UNSUPPORTED;
-    }
-    return PDFACTION_UNSUPPORTED;
+DLLEXPORT FPDF_DEST STDCALL FPDFBookmark_GetDest(FPDF_DOCUMENT document,
+                                                 FPDF_BOOKMARK pDict) {
+  if (!document)
+    return NULL;
+  if (!pDict)
+    return NULL;
+  CPDF_Bookmark bookmark((CPDF_Dictionary*)pDict);
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_Dest dest = bookmark.GetDest(pDoc);
+  if (dest)
+    return dest.GetObject();
+  // If this bookmark is not directly associated with a dest, we try to get
+  // action
+  CPDF_Action action = bookmark.GetAction();
+  if (!action)
+    return NULL;
+  return action.GetDest(pDoc).GetObject();
 }
 
-DLLEXPORT FPDF_DEST STDCALL FPDFAction_GetDest(FPDF_DOCUMENT document, FPDF_ACTION pDict)
-{
-    if (!document)
-        return NULL;
-    if (!pDict)
-        return NULL;
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_Action action((CPDF_Dictionary*)pDict);
-    return action.GetDest(pDoc).GetObject();
+DLLEXPORT FPDF_ACTION STDCALL FPDFBookmark_GetAction(FPDF_BOOKMARK pDict) {
+  if (!pDict)
+    return NULL;
+  CPDF_Bookmark bookmark((CPDF_Dictionary*)pDict);
+  return bookmark.GetAction().GetDict();
 }
 
-DLLEXPORT unsigned long STDCALL FPDFAction_GetURIPath(FPDF_DOCUMENT document, FPDF_ACTION pDict,
-                                              void* buffer, unsigned long buflen)
-{
-    if (!document)
-        return 0;
-    if (!pDict)
-        return 0;
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_Action action((CPDF_Dictionary*)pDict);
-    CFX_ByteString path = action.GetURI(pDoc);
-    unsigned long len = path.GetLength() + 1;
-    if (buffer != NULL && buflen >= len)
-        FXSYS_memcpy(buffer, path.c_str(), len);
-    return len;
+DLLEXPORT unsigned long STDCALL FPDFAction_GetType(FPDF_ACTION pDict) {
+  if (!pDict)
+    return 0;
+  CPDF_Action action((CPDF_Dictionary*)pDict);
+  CPDF_Action::ActionType type = action.GetType();
+  switch (type) {
+    case CPDF_Action::GoTo:
+      return PDFACTION_GOTO;
+    case CPDF_Action::GoToR:
+      return PDFACTION_REMOTEGOTO;
+    case CPDF_Action::URI:
+      return PDFACTION_URI;
+    case CPDF_Action::Launch:
+      return PDFACTION_LAUNCH;
+    default:
+      return PDFACTION_UNSUPPORTED;
+  }
+  return PDFACTION_UNSUPPORTED;
 }
 
-DLLEXPORT unsigned long STDCALL FPDFDest_GetPageIndex(FPDF_DOCUMENT document, FPDF_DEST pDict)
-{
-    if (!document)
-        return 0;
-    if (!pDict)
-        return 0;
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_Dest dest((CPDF_Array*)pDict);
-    return dest.GetPageIndex(pDoc);
+DLLEXPORT FPDF_DEST STDCALL FPDFAction_GetDest(FPDF_DOCUMENT document,
+                                               FPDF_ACTION pDict) {
+  if (!document)
+    return NULL;
+  if (!pDict)
+    return NULL;
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_Action action((CPDF_Dictionary*)pDict);
+  return action.GetDest(pDoc).GetObject();
 }
 
-static void ReleaseLinkList(void* data)
-{
-    delete (CPDF_LinkList*)data;
+DLLEXPORT unsigned long STDCALL FPDFAction_GetURIPath(FPDF_DOCUMENT document,
+                                                      FPDF_ACTION pDict,
+                                                      void* buffer,
+                                                      unsigned long buflen) {
+  if (!document)
+    return 0;
+  if (!pDict)
+    return 0;
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_Action action((CPDF_Dictionary*)pDict);
+  CFX_ByteString path = action.GetURI(pDoc);
+  unsigned long len = path.GetLength() + 1;
+  if (buffer != NULL && buflen >= len)
+    FXSYS_memcpy(buffer, path.c_str(), len);
+  return len;
 }
 
-DLLEXPORT FPDF_LINK STDCALL FPDFLink_GetLinkAtPoint(FPDF_PAGE page, double x, double y)
-{
-    if (!page)
-        return NULL;
-    CPDF_Page* pPage = (CPDF_Page*)page;
-    // Link list is stored with the document
-    CPDF_Document* pDoc = pPage->m_pDocument;
-    CPDF_LinkList* pLinkList = (CPDF_LinkList*)pDoc->GetPrivateData(&THISMODULE);
-    if (!pLinkList) {
-        pLinkList = new CPDF_LinkList(pDoc);
-        pDoc->SetPrivateData(&THISMODULE, pLinkList, ReleaseLinkList);
-    }
-    return pLinkList->GetLinkAtPoint(pPage, (FX_FLOAT)x, (FX_FLOAT)y).GetDict();
+DLLEXPORT unsigned long STDCALL FPDFDest_GetPageIndex(FPDF_DOCUMENT document,
+                                                      FPDF_DEST pDict) {
+  if (!document)
+    return 0;
+  if (!pDict)
+    return 0;
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_Dest dest((CPDF_Array*)pDict);
+  return dest.GetPageIndex(pDoc);
 }
 
-DLLEXPORT FPDF_DEST STDCALL FPDFLink_GetDest(FPDF_DOCUMENT document, FPDF_LINK pDict)
-{
-    if (!document)
-        return NULL;
-    if (!pDict)
-        return NULL;
-    CPDF_Document* pDoc = (CPDF_Document*)document;
-    CPDF_Link link((CPDF_Dictionary*)pDict);
-    FPDF_DEST dest = link.GetDest(pDoc).GetObject();
-    if (dest)
-        return dest;
-    // If this link is not directly associated with a dest, we try to get action
-    CPDF_Action action = link.GetAction();
-    if (!action)
-        return NULL;
-    return action.GetDest(pDoc).GetObject();
+DLLEXPORT FPDF_LINK STDCALL
+FPDFLink_GetLinkAtPoint(FPDF_PAGE page, double x, double y) {
+  CPDF_Page* pPage = (CPDF_Page*)page;
+  CPDF_LinkList* pLinkList = GetLinkList(pPage);
+  if (!pLinkList)
+    return nullptr;
+
+  return pLinkList->GetLinkAtPoint(pPage, (FX_FLOAT)x, (FX_FLOAT)y, nullptr)
+      .GetDict();
+}
+
+DLLEXPORT int STDCALL
+FPDFLink_GetLinkZOrderAtPoint(FPDF_PAGE page, double x, double y) {
+  CPDF_Page* pPage = (CPDF_Page*)page;
+  CPDF_LinkList* pLinkList = GetLinkList(pPage);
+  if (!pLinkList)
+    return -1;
+
+  int z_order = -1;
+  pLinkList->GetLinkAtPoint(pPage, (FX_FLOAT)x, (FX_FLOAT)y, &z_order);
+  return z_order;
 }
 
-DLLEXPORT FPDF_ACTION STDCALL FPDFLink_GetAction(FPDF_LINK pDict)
-{
-    if (!pDict)
-        return NULL;
-    CPDF_Link link((CPDF_Dictionary*)pDict);
-    return link.GetAction().GetDict();
+DLLEXPORT FPDF_DEST STDCALL FPDFLink_GetDest(FPDF_DOCUMENT document,
+                                             FPDF_LINK pDict) {
+  if (!document)
+    return NULL;
+  if (!pDict)
+    return NULL;
+  CPDF_Document* pDoc = (CPDF_Document*)document;
+  CPDF_Link link((CPDF_Dictionary*)pDict);
+  FPDF_DEST dest = link.GetDest(pDoc).GetObject();
+  if (dest)
+    return dest;
+  // If this link is not directly associated with a dest, we try to get action
+  CPDF_Action action = link.GetAction();
+  if (!action)
+    return NULL;
+  return action.GetDest(pDoc).GetObject();
 }
 
-DLLEXPORT FPDF_BOOL STDCALL FPDFLink_Enumerate(FPDF_PAGE page, int* startPos, FPDF_LINK* linkAnnot)
-{
-    if(!page || !startPos || !linkAnnot)
-        return false;
-    CPDF_Page* pPage = (CPDF_Page*)page;
-    if(!pPage->m_pFormDict)
-        return false;
-    CPDF_Array* pAnnots = pPage->m_pFormDict->GetArray("Annots");
-    if(!pAnnots)
-        return false;
-    for (int i = *startPos; i < (int)pAnnots->GetCount(); i++) {
-        CPDF_Dictionary* pDict = (CPDF_Dictionary*)pAnnots->GetElementValue(i);
-        if (!pDict || pDict->GetType() != PDFOBJ_DICTIONARY)
-            continue;
-        if(pDict->GetString(FX_BSTRC("Subtype")).Equal(FX_BSTRC("Link"))) {
-            *startPos = i + 1;
-            *linkAnnot = (FPDF_LINK)pDict;
-            return true;
-        }
+DLLEXPORT FPDF_ACTION STDCALL FPDFLink_GetAction(FPDF_LINK pDict) {
+  if (!pDict)
+    return NULL;
+  CPDF_Link link((CPDF_Dictionary*)pDict);
+  return link.GetAction().GetDict();
+}
+
+DLLEXPORT FPDF_BOOL STDCALL FPDFLink_Enumerate(FPDF_PAGE page,
+                                               int* startPos,
+                                               FPDF_LINK* linkAnnot) {
+  if (!page || !startPos || !linkAnnot)
+    return FALSE;
+  CPDF_Page* pPage = (CPDF_Page*)page;
+  if (!pPage->m_pFormDict)
+    return FALSE;
+  CPDF_Array* pAnnots = pPage->m_pFormDict->GetArray("Annots");
+  if (!pAnnots)
+    return FALSE;
+  for (int i = *startPos; i < (int)pAnnots->GetCount(); i++) {
+    CPDF_Dictionary* pDict = (CPDF_Dictionary*)pAnnots->GetElementValue(i);
+    if (!pDict || pDict->GetType() != PDFOBJ_DICTIONARY)
+      continue;
+    if (pDict->GetString(FX_BSTRC("Subtype")).Equal(FX_BSTRC("Link"))) {
+      *startPos = i + 1;
+      *linkAnnot = (FPDF_LINK)pDict;
+      return TRUE;
     }
-    return false;
+  }
+  return FALSE;
 }
 
-DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetAnnotRect(FPDF_LINK linkAnnot, FS_RECTF* rect)
-{
-    if(!linkAnnot || !rect)
-        return false;
-    CPDF_Dictionary* pAnnotDict = (CPDF_Dictionary*)linkAnnot;
-    CPDF_Rect rt = pAnnotDict->GetRect(FX_BSTRC("Rect"));
-    rect->left = rt.left;
-    rect->bottom = rt.bottom;
-    rect->right = rt.right;
-    rect->top = rt.top;
-    return true;
+DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetAnnotRect(FPDF_LINK linkAnnot,
+                                                  FS_RECTF* rect) {
+  if (!linkAnnot || !rect)
+    return FALSE;
+  CPDF_Dictionary* pAnnotDict = (CPDF_Dictionary*)linkAnnot;
+  CPDF_Rect rt = pAnnotDict->GetRect(FX_BSTRC("Rect"));
+  rect->left = rt.left;
+  rect->bottom = rt.bottom;
+  rect->right = rt.right;
+  rect->top = rt.top;
+  return TRUE;
 }
 
-DLLEXPORT int STDCALL FPDFLink_CountQuadPoints(FPDF_LINK linkAnnot)
-{
-    if(!linkAnnot)
-        return 0;
-    CPDF_Dictionary* pAnnotDict = (CPDF_Dictionary*)linkAnnot;
-    CPDF_Array* pArray = pAnnotDict->GetArray(FX_BSTRC("QuadPoints"));
-    if (!pArray)
-        return 0;
-    return pArray->GetCount() / 8;
+DLLEXPORT int STDCALL FPDFLink_CountQuadPoints(FPDF_LINK linkAnnot) {
+  if (!linkAnnot)
+    return 0;
+  CPDF_Dictionary* pAnnotDict = (CPDF_Dictionary*)linkAnnot;
+  CPDF_Array* pArray = pAnnotDict->GetArray(FX_BSTRC("QuadPoints"));
+  if (!pArray)
+    return 0;
+  return pArray->GetCount() / 8;
 }
 
-DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetQuadPoints(FPDF_LINK linkAnnot, int quadIndex, FS_QUADPOINTSF* quadPoints)
-{
-    if(!linkAnnot || !quadPoints)
-        return false;
-    CPDF_Dictionary* pAnnotDict = (CPDF_Dictionary*)linkAnnot;
-    CPDF_Array* pArray = pAnnotDict->GetArray(FX_BSTRC("QuadPoints"));
-    if (pArray) {
-        if (quadIndex < 0 || quadIndex >= (int)pArray->GetCount()/8 || ((quadIndex*8+7) >= (int)pArray->GetCount()))
-            return false;
-        quadPoints->x1 = pArray->GetNumber(quadIndex*8);
-        quadPoints->y1 = pArray->GetNumber(quadIndex*8+1);
-        quadPoints->x2 = pArray->GetNumber(quadIndex*8+2);
-        quadPoints->y2 = pArray->GetNumber(quadIndex*8+3);
-        quadPoints->x3 = pArray->GetNumber(quadIndex*8+4);
-        quadPoints->y3 = pArray->GetNumber(quadIndex*8+5);
-        quadPoints->x4 = pArray->GetNumber(quadIndex*8+6);
-        quadPoints->y4 = pArray->GetNumber(quadIndex*8+7);
-        return true;
-    }
-    return false;
+DLLEXPORT FPDF_BOOL STDCALL FPDFLink_GetQuadPoints(FPDF_LINK linkAnnot,
+                                                   int quadIndex,
+                                                   FS_QUADPOINTSF* quadPoints) {
+  if (!linkAnnot || !quadPoints)
+    return FALSE;
+  CPDF_Dictionary* pAnnotDict = (CPDF_Dictionary*)linkAnnot;
+  CPDF_Array* pArray = pAnnotDict->GetArray(FX_BSTRC("QuadPoints"));
+  if (pArray) {
+    if (quadIndex < 0 || quadIndex >= (int)pArray->GetCount() / 8 ||
+        ((quadIndex * 8 + 7) >= (int)pArray->GetCount()))
+      return FALSE;
+    quadPoints->x1 = pArray->GetNumber(quadIndex * 8);
+    quadPoints->y1 = pArray->GetNumber(quadIndex * 8 + 1);
+    quadPoints->x2 = pArray->GetNumber(quadIndex * 8 + 2);
+    quadPoints->y2 = pArray->GetNumber(quadIndex * 8 + 3);
+    quadPoints->x3 = pArray->GetNumber(quadIndex * 8 + 4);
+    quadPoints->y3 = pArray->GetNumber(quadIndex * 8 + 5);
+    quadPoints->x4 = pArray->GetNumber(quadIndex * 8 + 6);
+    quadPoints->y4 = pArray->GetNumber(quadIndex * 8 + 7);
+    return TRUE;
+  }
+  return FALSE;
 }
 
-DLLEXPORT unsigned long STDCALL FPDF_GetMetaText(FPDF_DOCUMENT doc, FPDF_BYTESTRING tag,
-                                                 void* buffer, unsigned long buflen)
-{
-    if (!doc || !tag)
-        return 0;
-    CPDF_Document* pDoc = (CPDF_Document*)doc;
-    // Get info dictionary
-    CPDF_Dictionary* pInfo = pDoc->GetInfo();
-    if (!pInfo)
-        return 0;
-    CFX_WideString text = pInfo->GetUnicodeText(tag);
-    // Use UTF-16LE encoding
-    CFX_ByteString encodedText = text.UTF16LE_Encode();
-    unsigned long len = encodedText.GetLength();
-    if (buffer && buflen >= len) {
-        FXSYS_memcpy(buffer, encodedText.c_str(), len);
-    }
-    return len;
+DLLEXPORT unsigned long STDCALL FPDF_GetMetaText(FPDF_DOCUMENT doc,
+                                                 FPDF_BYTESTRING tag,
+                                                 void* buffer,
+                                                 unsigned long buflen) {
+  if (!doc || !tag)
+    return 0;
+  CPDF_Document* pDoc = (CPDF_Document*)doc;
+  // Get info dictionary
+  CPDF_Dictionary* pInfo = pDoc->GetInfo();
+  if (!pInfo)
+    return 0;
+  CFX_WideString text = pInfo->GetUnicodeText(tag);
+  // Use UTF-16LE encoding
+  CFX_ByteString encodedText = text.UTF16LE_Encode();
+  unsigned long len = encodedText.GetLength();
+  if (buffer && buflen >= len) {
+    FXSYS_memcpy(buffer, encodedText.c_str(), len);
+  }
+  return len;
 }