From eb6527763171cdb4b0fbfea5a20d691f4d67b660 Mon Sep 17 00:00:00 2001
From: Tom Sepez <tsepez@chromium.org>
Date: Tue, 19 May 2015 14:48:00 -0700
Subject: Remove FX_Alloc() null checks now that it can't return NULL.

This permits some functions to become void's since
they, in turn, can't fail.

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1142713005
---
 core/src/fxge/ge/fx_ge_path.cpp | 63 +++++++++++++----------------------------
 1 file changed, 19 insertions(+), 44 deletions(-)

(limited to 'core/src/fxge/ge/fx_ge_path.cpp')

diff --git a/core/src/fxge/ge/fx_ge_path.cpp b/core/src/fxge/ge/fx_ge_path.cpp
index b96a2f1163..5982082f7b 100644
--- a/core/src/fxge/ge/fx_ge_path.cpp
+++ b/core/src/fxge/ge/fx_ge_path.cpp
@@ -4,8 +4,10 @@
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "../../../../third_party/base/numerics/safe_math.h"
 #include "../../../include/fxcrt/fx_basic.h"
 #include "../../../include/fxge/fx_ge.h"
+
 CFX_ClipRgn::CFX_ClipRgn(int width, int height)
 {
     m_Type = RectI;
@@ -120,7 +122,7 @@ CFX_PathData::~CFX_PathData()
         FX_Free(m_pPoints);
     }
 }
-FX_BOOL CFX_PathData::SetPointCount(int nPoints)
+void CFX_PathData::SetPointCount(int nPoints)
 {
     m_PointCount = nPoints;
     if (m_AllocCount < nPoints) {
@@ -129,20 +131,13 @@ FX_BOOL CFX_PathData::SetPointCount(int nPoints)
             m_pPoints = NULL;
         }
         m_pPoints = FX_Alloc(FX_PATHPOINT, nPoints);
-        if (!m_pPoints) {
-            return FALSE;
-        }
         m_AllocCount = nPoints;
     }
-    return TRUE;
 }
-FX_BOOL CFX_PathData::AllocPointCount(int nPoints)
+void CFX_PathData::AllocPointCount(int nPoints)
 {
     if (m_AllocCount < nPoints) {
         FX_PATHPOINT* pNewBuf = FX_Alloc(FX_PATHPOINT, nPoints);
-        if (!pNewBuf) {
-            return FALSE;
-        }
         if (m_PointCount) {
             FXSYS_memcpy32(pNewBuf, m_pPoints, m_PointCount * sizeof(FX_PATHPOINT));
         }
@@ -152,16 +147,11 @@ FX_BOOL CFX_PathData::AllocPointCount(int nPoints)
         m_pPoints = pNewBuf;
         m_AllocCount = nPoints;
     }
-    return TRUE;
 }
 CFX_PathData::CFX_PathData(const CFX_PathData& src)
 {
-    m_pPoints = NULL;
     m_PointCount = m_AllocCount = src.m_PointCount;
     m_pPoints = FX_Alloc(FX_PATHPOINT, src.m_PointCount);
-    if (!m_pPoints) {
-        return;
-    }
     FXSYS_memcpy32(m_pPoints, src.m_pPoints, sizeof(FX_PATHPOINT) * m_PointCount);
 }
 void CFX_PathData::TrimPoints(int nPoints)
@@ -171,29 +161,23 @@ void CFX_PathData::TrimPoints(int nPoints)
     }
     SetPointCount(nPoints);
 }
-FX_BOOL CFX_PathData::AddPointCount(int addPoints)
+void CFX_PathData::AddPointCount(int addPoints)
 {
-    int new_count = m_PointCount + addPoints;
-    if (!AllocPointCount(new_count)) {
-        return FALSE;
-    }
-    m_PointCount = new_count;
-    return TRUE;
+    pdfium::base::CheckedNumeric<int> new_count = m_PointCount;
+    new_count += addPoints;
+    m_PointCount = new_count.ValueOrDie();
+    AllocPointCount(m_PointCount);
 }
-FX_BOOL CFX_PathData::Append(const CFX_PathData* pSrc, const CFX_AffineMatrix* pMatrix)
+void CFX_PathData::Append(const CFX_PathData* pSrc, const CFX_AffineMatrix* pMatrix)
 {
     int old_count = m_PointCount;
-    if (!AddPointCount(pSrc->m_PointCount)) {
-        return FALSE;
-    }
+    AddPointCount(pSrc->m_PointCount);
     FXSYS_memcpy32(m_pPoints + old_count, pSrc->m_pPoints, pSrc->m_PointCount * sizeof(FX_PATHPOINT));
-    if (pMatrix == NULL) {
-        return TRUE;
-    }
-    for (int i = 0; i < pSrc->m_PointCount; i ++) {
-        pMatrix->Transform(m_pPoints[old_count + i].m_PointX, m_pPoints[old_count + i].m_PointY);
+    if (pMatrix) {
+        for (int i = 0; i < pSrc->m_PointCount; i ++) {
+            pMatrix->Transform(m_pPoints[old_count + i].m_PointX, m_pPoints[old_count + i].m_PointY);
+        }
     }
-    return TRUE;
 }
 void CFX_PathData::SetPoint(int index, FX_FLOAT x, FX_FLOAT y, int flag)
 {
@@ -202,12 +186,10 @@ void CFX_PathData::SetPoint(int index, FX_FLOAT x, FX_FLOAT y, int flag)
     m_pPoints[index].m_PointY = y;
     m_pPoints[index].m_Flag = flag;
 }
-FX_BOOL CFX_PathData::AppendRect(FX_FLOAT left, FX_FLOAT bottom, FX_FLOAT right, FX_FLOAT top)
+void CFX_PathData::AppendRect(FX_FLOAT left, FX_FLOAT bottom, FX_FLOAT right, FX_FLOAT top)
 {
     int old_count = m_PointCount;
-    if (!AddPointCount(5)) {
-        return FALSE;
-    }
+    AddPointCount(5);
     FX_PATHPOINT* pPoints = m_pPoints + old_count;
     pPoints[0].m_PointX = pPoints[1].m_PointX = pPoints[4].m_PointX = left;
     pPoints[2].m_PointX = pPoints[3].m_PointX = right;
@@ -216,7 +198,6 @@ FX_BOOL CFX_PathData::AppendRect(FX_FLOAT left, FX_FLOAT bottom, FX_FLOAT right,
     pPoints[0].m_Flag = FXPT_MOVETO;
     pPoints[1].m_Flag = pPoints[2].m_Flag = pPoints[3].m_Flag = FXPT_LINETO;
     pPoints[4].m_Flag = FXPT_LINETO | FXPT_CLOSEFIGURE;
-    return TRUE;
 }
 CFX_FloatRect CFX_PathData::GetBoundingBox() const
 {
@@ -590,13 +571,10 @@ FX_BOOL CFX_PathData::IsRect(const CFX_AffineMatrix* pMatrix, CFX_FloatRect* pRe
     }
     return TRUE;
 }
-FX_BOOL CFX_PathData::Copy(const CFX_PathData &src)
+void CFX_PathData::Copy(const CFX_PathData &src)
 {
-    if (!SetPointCount(src.m_PointCount)) {
-        return FALSE;
-    }
+    SetPointCount(src.m_PointCount);
     FXSYS_memcpy32(m_pPoints, src.m_pPoints, sizeof(FX_PATHPOINT) * m_PointCount);
-    return TRUE;
 }
 CFX_GraphStateData::CFX_GraphStateData()
 {
@@ -627,9 +605,6 @@ void CFX_GraphStateData::Copy(const CFX_GraphStateData& src)
     m_LineWidth = src.m_LineWidth;
     if (m_DashCount) {
         m_DashArray = FX_Alloc(FX_FLOAT, m_DashCount);
-        if (!m_DashArray) {
-            return;
-        }
         FXSYS_memcpy32(m_DashArray, src.m_DashArray, m_DashCount * sizeof(FX_FLOAT));
     }
 }
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