Remove try/catch block
[pdfium.git] / fpdfsdk / src / fpdfview.cpp
index a5ba796..2e1bca3 100644 (file)
@@ -9,7 +9,7 @@
 #include "../include/fsdk_rendercontext.h"
 #include "../include/fpdf_progressive.h"
 #include "../include/fpdf_ext.h"
-
+#include "../../third_party/numerics/safe_conversions_impl.h"
 
 CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
 {
@@ -35,18 +35,25 @@ FX_BOOL CPDF_CustomAccess::GetByte(FX_DWORD pos, FX_BYTE& ch)
 
 FX_BOOL CPDF_CustomAccess::GetBlock(FX_DWORD pos, FX_LPBYTE pBuf, FX_DWORD size)
 {
-       if (pos + size > m_FileAccess.m_FileLen) return FALSE;
-       return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, pos, pBuf, size);
+    FX_SAFE_DWORD newPos = size;
+    newPos += pos;
+    if (!newPos.IsValid() || newPos.ValueOrDie() > m_FileAccess.m_FileLen) {
+        return FALSE;
+    }
+    return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, pos, pBuf, size);
 }
 
 FX_BOOL CPDF_CustomAccess::ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)
 {
-       //      m_FileAccess = *pFileAccess;
-       //      m_BufferOffset = (FX_DWORD)-1;
-       if (offset + size > m_FileAccess.m_FileLen) return FALSE;
-       return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, offset,(FX_LPBYTE) buffer, size);
-
-       //      return FALSE;
+    if (offset < 0) {
+        return FALSE;
+    }
+    FX_SAFE_FILESIZE newPos = base::checked_cast<FX_FILESIZE, size_t>(size);
+    newPos += offset;
+    if (!newPos.IsValid() || newPos.ValueOrDie() > m_FileAccess.m_FileLen) {
+        return FALSE;
+    }
+    return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, offset,(FX_LPBYTE) buffer, size);
 }
 
 //0 bit: FPDF_POLICY_MACHINETIME_ACCESS
@@ -96,9 +103,6 @@ FPDF_BOOL FSDK_IsSandBoxPolicyEnabled(FPDF_DWORD policy)
        CPDF_ModuleMgr* g_pModuleMgr = NULL;
 #else
        CCodec_ModuleMgr*       g_pCodecModule = NULL;
-#ifdef _FXSDK_OPENSOURCE_
-       FXMEM_FoxitMgr* g_pFoxitMgr = NULL;
-#endif
 #endif
 
 //extern CPDFSDK_FormFillApp* g_pFormFillApp;
@@ -161,9 +165,6 @@ DLLEXPORT void STDCALL FPDF_InitLibrary(FX_LPVOID hInstance)
                g_pModuleMgr->InitDesktop();
         #endif
 #else
-#ifdef _FXSDK_OPENSOURCE_
-       g_pFoxitMgr = FXMEM_CreateMemoryMgr(1024 * 1024 * 32, TRUE);
-#endif
        g_pCodecModule = CCodec_ModuleMgr::Create();
        
        CFX_GEModule::Create();
@@ -225,7 +226,7 @@ DLLEXPORT void STDCALL FPDF_DestroyLibrary()
 #ifndef _FXSDK_OPENSOURCE_
        FXMEM_CollectAll(FXMEM_GetDefaultMgr());
 #else
-       FXMEM_DestroyFoxitMgr(g_pFoxitMgr);
+
 #endif
 }
 
@@ -271,17 +272,11 @@ DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BY
 {
        CPDF_Parser* pParser = FX_NEW CPDF_Parser;
        pParser->SetPassword(password);
-       try {
-               FX_DWORD err_code = pParser->StartParse((FX_LPCSTR)file_path);
-               if (err_code) {
-                       delete pParser;
-                       ProcessParseError(err_code);
-                       return NULL;
-               }
-       }
-       catch (...) {
+
+       FX_DWORD err_code = pParser->StartParse((FX_LPCSTR)file_path);
+       if (err_code) {
                delete pParser;
-               SetLastError(FPDF_ERR_UNKNOWN);
+               ProcessParseError(err_code);
                return NULL;
        }
        return pParser->GetDocument();
@@ -289,7 +284,7 @@ DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BY
 
 extern void CheckUnSupportError(CPDF_Document * pDoc, FX_DWORD err_code);
 
-class CMemFile: public IFX_FileRead, public CFX_Object
+class CMemFile FX_FINAL: public IFX_FileRead, public CFX_Object
 {
 public:
        CMemFile(FX_BYTE* pBuf, FX_FILESIZE size):m_pBuf(pBuf),m_size(size) {}
@@ -298,9 +293,16 @@ public:
        virtual FX_FILESIZE             GetSize() {return m_size;}
        virtual FX_BOOL                 ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) 
        {
-               if(offset+size > (FX_DWORD)m_size) return FALSE;
-               FXSYS_memcpy(buffer, m_pBuf+offset, size);
-               return TRUE;
+            if (offset < 0) {
+                return FALSE;
+            }
+            FX_SAFE_FILESIZE newPos = base::checked_cast<FX_FILESIZE, size_t>(size);
+            newPos += offset;
+            if (!newPos.IsValid() || newPos.ValueOrDie() > (FX_DWORD)m_size) {
+                return FALSE;
+            }
+           FXSYS_memcpy(buffer, m_pBuf+offset, size);
+           return TRUE;
        }
 private:
        FX_BYTE* m_pBuf;
@@ -310,23 +312,16 @@ DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadMemDocument(const void* data_buf, int s
 {
        CPDF_Parser* pParser = FX_NEW CPDF_Parser;
        pParser->SetPassword(password);
-       try {
-               CMemFile* pMemFile = FX_NEW CMemFile((FX_BYTE*)data_buf, size);
-               FX_DWORD err_code = pParser->StartParse(pMemFile);
-               if (err_code) {
-                       delete pParser;
-                       ProcessParseError(err_code);
-                       return NULL;
-               }
-               CPDF_Document * pDoc = NULL;
-               pDoc = pParser?pParser->GetDocument():NULL;
-               CheckUnSupportError(pDoc, err_code);
-       }
-       catch (...) {
+       CMemFile* pMemFile = FX_NEW CMemFile((FX_BYTE*)data_buf, size);
+       FX_DWORD err_code = pParser->StartParse(pMemFile);
+       if (err_code) {
                delete pParser;
-               SetLastError(FPDF_ERR_UNKNOWN);
+               ProcessParseError(err_code);
                return NULL;
        }
+       CPDF_Document * pDoc = NULL;
+       pDoc = pParser?pParser->GetDocument():NULL;
+       CheckUnSupportError(pDoc, err_code);
        return pParser->GetDocument();
 }
 
@@ -335,22 +330,15 @@ DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAc
        CPDF_Parser* pParser = FX_NEW CPDF_Parser;
        pParser->SetPassword(password);
        CPDF_CustomAccess* pFile = FX_NEW CPDF_CustomAccess(pFileAccess);
-       try {
-               FX_DWORD err_code = pParser->StartParse(pFile);
-               if (err_code) {
-                       delete pParser;
-                       ProcessParseError(err_code);
-                       return NULL;
-               }
-               CPDF_Document * pDoc = NULL;
-               pDoc = pParser?pParser->GetDocument():NULL;
-               CheckUnSupportError(pDoc, err_code);
-       }
-       catch (...) {
+       FX_DWORD err_code = pParser->StartParse(pFile);
+       if (err_code) {
                delete pParser;
-               SetLastError(FPDF_ERR_UNKNOWN);
+               ProcessParseError(err_code);
                return NULL;
        }
+       CPDF_Document * pDoc = NULL;
+       pDoc = pParser?pParser->GetDocument():NULL;
+       CheckUnSupportError(pDoc, err_code);
        return pParser->GetDocument();
 }
 
@@ -395,13 +383,7 @@ DLLEXPORT FPDF_PAGE STDCALL FPDF_LoadPage(FPDF_DOCUMENT document, int page_index
        if (pDict == NULL) return NULL;
        CPDF_Page* pPage = FX_NEW CPDF_Page;
        pPage->Load(pDoc, pDict);
-       try {
-               pPage->ParseContent();
-       }
-       catch (...) {
-               delete pPage;
-               return NULL;
-       }
+       pPage->ParseContent();
        
 //     CheckUnSupportError(pDoc, 0);
 
@@ -464,15 +446,10 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
 #endif
        }
        else
-       pContext->m_pDevice = FX_NEW CFX_WindowsDevice(dc);
-       if (flags & FPDF_NO_CATCH)
-               Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
-       else {
-               try {
-                       Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
-               } catch (...) {
-               }
-       }
+           pContext->m_pDevice = FX_NEW CFX_WindowsDevice(dc);
+
+       Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
+
        if (bBackgroundAlphaNeeded) 
        {
                if (pBitmap)
@@ -485,7 +462,7 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
                                pDst->Create(pBitmap->GetWidth(), pBitmap->GetHeight(),FXDIB_Rgb32);
                                FXSYS_memcpy(pDst->GetBuffer(), pBitmap->GetBuffer(), pBitmap->GetPitch()*pBitmap->GetHeight());
 //                             WinDC.SetDIBits(pDst,0,0);
-                               WinDC.StretchDIBits(pDst,0,0,size_x*2,size_y*2);
+                               WinDC.StretchDIBits(pDst,0,0,size_x,size_y);
                                delete pDst;
                        }
                        else
@@ -551,14 +528,7 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
 #endif
 
        // output to bitmap device
-       if (flags & FPDF_NO_CATCH)
-               Func_RenderPage(pContext, page, start_x - rect.left, start_y - rect.top, size_x, size_y, rotate, flags);
-       else {
-               try {
-                       Func_RenderPage(pContext, page, start_x - rect.left, start_y - rect.top, size_x, size_y, rotate, flags);
-               } catch (...) {
-               }
-       }
+       Func_RenderPage(pContext, page, start_x - rect.left, start_y - rect.top, size_x, size_y, rotate, flags);
 
 #ifdef DEBUG_TRACE
        CPDF_ModuleMgr::Get()->ReportError(999, "Finished PDF rendering");
@@ -626,14 +596,8 @@ DLLEXPORT void STDCALL FPDF_RenderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page,
        else
                ((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
 #endif
-       if (flags & FPDF_NO_CATCH)
-               Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
-       else {
-               try {
-                       Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
-               } catch (...) {
-               }
-       }
+
+       Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
 
        delete pContext;
        pPage->RemovePrivateData((void*)1);
@@ -731,8 +695,7 @@ DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_CreateEx(int width, int height, int for
        return pBitmap;
 }
 
-DLLEXPORT void STDCALL FPDFBitmap_FillRect(FPDF_BITMAP bitmap, int left, int top, int width, int height, 
-                                                                       int red, int green, int blue, int alpha)
+DLLEXPORT void STDCALL FPDFBitmap_FillRect(FPDF_BITMAP bitmap, int left, int top, int width, int height, FPDF_DWORD color)
 {
        if (bitmap == NULL) return;
 #ifdef _SKIA_SUPPORT_
@@ -741,9 +704,9 @@ DLLEXPORT void STDCALL FPDFBitmap_FillRect(FPDF_BITMAP bitmap, int left, int top
        CFX_FxgeDevice device;
 #endif
        device.Attach((CFX_DIBitmap*)bitmap);
-       if (!((CFX_DIBitmap*)bitmap)->HasAlpha()) alpha = 255;
+       if (!((CFX_DIBitmap*)bitmap)->HasAlpha()) color |= 0xFF000000;
        FX_RECT rect(left, top, left+width, top+height);
-       device.FillRect(&rect, FXARGB_MAKE(alpha, red, green, blue));
+       device.FillRect(&rect, color);
 }
 
 DLLEXPORT void* STDCALL FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap)
@@ -866,6 +829,37 @@ DLLEXPORT FPDF_BOOL STDCALL FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT documen
        return viewRef.PrintScaling();
 }
 
+DLLEXPORT int STDCALL FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document)
+{
+    CPDF_Document* pDoc = (CPDF_Document*)document;
+    if (!pDoc) return 1;
+    CPDF_ViewerPreferences viewRef(pDoc);
+    return viewRef.NumCopies();
+}
+
+DLLEXPORT FPDF_PAGERANGE STDCALL FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document)
+{
+    CPDF_Document* pDoc = (CPDF_Document*)document;
+    if (!pDoc) return NULL;
+    CPDF_ViewerPreferences viewRef(pDoc);
+    return viewRef.PrintPageRange();
+}
+
+DLLEXPORT FPDF_DUPLEXTYPE STDCALL FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document)
+{
+    CPDF_Document* pDoc = (CPDF_Document*)document;
+    if (!pDoc) return DuplexUndefined;
+    CPDF_ViewerPreferences viewRef(pDoc);
+    CFX_ByteString duplex = viewRef.Duplex();
+    if (FX_BSTRC("Simplex") == duplex)
+        return Simplex;
+    if (FX_BSTRC("DuplexFlipShortEdge") == duplex)
+        return DuplexFlipShortEdge;
+    if (FX_BSTRC("DuplexFlipLongEdge") == duplex)
+        return DuplexFlipLongEdge;
+    return DuplexUndefined;
+}
+
 DLLEXPORT FPDF_DEST STDCALL FPDF_GetNamedDestByName(FPDF_DOCUMENT document,FPDF_BYTESTRING name)
 {
        if (document == NULL)