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-rw-r--r--core/src/fxcrt/fx_basic_bstring.cpp54
-rw-r--r--core/src/fxcrt/fx_basic_wstring.cpp35
2 files changed, 54 insertions, 35 deletions
diff --git a/core/src/fxcrt/fx_basic_bstring.cpp b/core/src/fxcrt/fx_basic_bstring.cpp
index ef52447771..435f5a5e5c 100644
--- a/core/src/fxcrt/fx_basic_bstring.cpp
+++ b/core/src/fxcrt/fx_basic_bstring.cpp
@@ -5,6 +5,8 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "../../include/fxcrt/fx_basic.h"
+#include "../../../third_party/numerics/safe_math.h"
+
static int _Buffer_itoa(char* buf, int i, FX_DWORD flags)
{
if (i == 0) {
@@ -45,10 +47,14 @@ CFX_ByteString CFX_ByteString::FormatInteger(int i, FX_DWORD flags)
}
static CFX_StringData* FX_AllocString(int nLen)
{
- if (nLen == 0) {
+ // |nLen| is currently declared as in |int|. TODO(palmer): It should be
+ // a |size_t|, or at least unsigned.
+ if (nLen == 0 || nLen < 0) {
return NULL;
}
- CFX_StringData* pData = (CFX_StringData*)FX_Alloc(FX_BYTE, sizeof(long) * 3 + (nLen + 1) * sizeof(char));
+ base::CheckedNumeric<int> nSize = nLen;
+ nSize += sizeof(long) * 3 + 1;
+ CFX_StringData* pData = (CFX_StringData*)FX_Alloc(FX_BYTE, nSize.ValueOrDie());
if (!pData) {
return NULL;
}
@@ -86,7 +92,7 @@ CFX_ByteString::CFX_ByteString(FX_LPCSTR lpsz, FX_STRSIZE nLen)
if (nLen) {
m_pData = FX_AllocString(nLen);
if (m_pData) {
- FXSYS_memcpy32(m_pData->m_String, lpsz, nLen * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, lpsz, nLen);
}
} else {
m_pData = NULL;
@@ -97,7 +103,7 @@ CFX_ByteString::CFX_ByteString(FX_LPCBYTE lpsz, FX_STRSIZE nLen)
if (nLen > 0) {
m_pData = FX_AllocString(nLen);
if (m_pData) {
- FXSYS_memcpy32(m_pData->m_String, lpsz, nLen * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, lpsz, nLen);
}
} else {
m_pData = NULL;
@@ -195,7 +201,7 @@ void CFX_ByteString::Load(FX_LPCBYTE buf, FX_STRSIZE len)
if (len) {
m_pData = FX_AllocString(len);
if (m_pData) {
- FXSYS_memcpy32(m_pData->m_String, buf, len * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, buf, len);
}
} else {
m_pData = NULL;
@@ -293,7 +299,7 @@ bool CFX_ByteString::EqualNoCase(FX_BSTR str) const
void CFX_ByteString::AssignCopy(FX_STRSIZE nSrcLen, FX_LPCSTR lpszSrcData)
{
AllocBeforeWrite(nSrcLen);
- FXSYS_memcpy32(m_pData->m_String, lpszSrcData, nSrcLen * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, lpszSrcData, nSrcLen);
m_pData->m_nDataLength = nSrcLen;
m_pData->m_String[nSrcLen] = 0;
}
@@ -307,7 +313,7 @@ void CFX_ByteString::CopyBeforeWrite()
FX_STRSIZE nDataLength = pData->m_nDataLength;
m_pData = FX_AllocString(nDataLength);
if (m_pData != NULL) {
- FXSYS_memcpy32(m_pData->m_String, pData->m_String, (nDataLength + 1) * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, pData->m_String, nDataLength + 1);
}
}
void CFX_ByteString::AllocBeforeWrite(FX_STRSIZE nLen)
@@ -375,7 +381,7 @@ FX_LPSTR CFX_ByteString::GetBuffer(FX_STRSIZE nMinBufLength)
if (!m_pData) {
return NULL;
}
- FXSYS_memcpy32(m_pData->m_String, pOldData->m_String, (nOldLen + 1)*sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, pOldData->m_String, (nOldLen + 1));
m_pData->m_nDataLength = nOldLen;
pOldData->m_nRefs --;
if (pOldData->m_nRefs <= 0) {
@@ -401,7 +407,7 @@ FX_STRSIZE CFX_ByteString::Delete(FX_STRSIZE nIndex, FX_STRSIZE nCount)
CopyBeforeWrite();
int nBytesToCopy = nOldLength - mLength + 1;
FXSYS_memmove32(m_pData->m_String + nIndex,
- m_pData->m_String + mLength, nBytesToCopy * sizeof(char));
+ m_pData->m_String + mLength, nBytesToCopy);
m_pData->m_nDataLength = nOldLength - nCount;
}
return m_pData->m_nDataLength;
@@ -416,7 +422,7 @@ void CFX_ByteString::ConcatInPlace(FX_STRSIZE nSrcLen, FX_LPCSTR lpszSrcData)
if (!m_pData) {
return;
}
- FXSYS_memcpy32(m_pData->m_String, lpszSrcData, nSrcLen * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, lpszSrcData, nSrcLen);
return;
}
if (m_pData->m_nRefs > 1 || m_pData->m_nDataLength + nSrcLen > m_pData->m_nAllocLength) {
@@ -424,7 +430,7 @@ void CFX_ByteString::ConcatInPlace(FX_STRSIZE nSrcLen, FX_LPCSTR lpszSrcData)
ConcatCopy(m_pData->m_nDataLength, m_pData->m_String, nSrcLen, lpszSrcData);
FX_ReleaseString(pOldData);
} else {
- FXSYS_memcpy32(m_pData->m_String + m_pData->m_nDataLength, lpszSrcData, nSrcLen * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String + m_pData->m_nDataLength, lpszSrcData, nSrcLen);
m_pData->m_nDataLength += nSrcLen;
m_pData->m_String[m_pData->m_nDataLength] = 0;
}
@@ -438,8 +444,8 @@ void CFX_ByteString::ConcatCopy(FX_STRSIZE nSrc1Len, FX_LPCSTR lpszSrc1Data,
}
m_pData = FX_AllocString(nNewLen);
if (m_pData) {
- FXSYS_memcpy32(m_pData->m_String, lpszSrc1Data, nSrc1Len * sizeof(char));
- FXSYS_memcpy32(m_pData->m_String + nSrc1Len, lpszSrc2Data, nSrc2Len * sizeof(char));
+ FXSYS_memcpy32(m_pData->m_String, lpszSrc1Data, nSrc1Len);
+ FXSYS_memcpy32(m_pData->m_String + nSrc1Len, lpszSrc2Data, nSrc2Len);
}
}
CFX_ByteString CFX_ByteString::Mid(FX_STRSIZE nFirst) const
@@ -467,20 +473,20 @@ CFX_ByteString CFX_ByteString::Mid(FX_STRSIZE nFirst, FX_STRSIZE nCount) const
return *this;
}
CFX_ByteString dest;
- AllocCopy(dest, nCount, nFirst, 0);
+ AllocCopy(dest, nCount, nFirst);
return dest;
}
-void CFX_ByteString::AllocCopy(CFX_ByteString& dest, FX_STRSIZE nCopyLen, FX_STRSIZE nCopyIndex,
- FX_STRSIZE nExtraLen) const
+void CFX_ByteString::AllocCopy(CFX_ByteString& dest, FX_STRSIZE nCopyLen, FX_STRSIZE nCopyIndex) const
{
- FX_STRSIZE nNewLen = nCopyLen + nExtraLen;
- if (nNewLen == 0) {
+ // |FX_STRSIZE| is currently typedef'd as in |int|. TODO(palmer): It
+ // should be a |size_t|, or at least unsigned.
+ if (nCopyLen == 0 || nCopyLen < 0) {
return;
}
ASSERT(dest.m_pData == NULL);
- dest.m_pData = FX_AllocString(nNewLen);
+ dest.m_pData = FX_AllocString(nCopyLen);
if (dest.m_pData) {
- FXSYS_memcpy32(dest.m_pData->m_String, m_pData->m_String + nCopyIndex, nCopyLen * sizeof(char));
+ FXSYS_memcpy32(dest.m_pData->m_String, m_pData->m_String + nCopyIndex, nCopyLen);
}
}
#define FORCE_ANSI 0x10000
@@ -724,14 +730,14 @@ FX_STRSIZE CFX_ByteString::Insert(FX_STRSIZE nIndex, FX_CHAR ch)
return 0;
}
if(pOldData != NULL) {
- FXSYS_memmove32(m_pData->m_String, pstr, (pOldData->m_nDataLength + 1)*sizeof(char));
+ FXSYS_memmove32(m_pData->m_String, pstr, (pOldData->m_nDataLength + 1));
FX_ReleaseString(pOldData);
} else {
m_pData->m_String[0] = 0;
}
}
FXSYS_memmove32(m_pData->m_String + nIndex + 1,
- m_pData->m_String + nIndex, (nNewLength - nIndex)*sizeof(char));
+ m_pData->m_String + nIndex, (nNewLength - nIndex));
m_pData->m_String[nIndex] = ch;
m_pData->m_nDataLength = nNewLength;
return nNewLength;
@@ -748,7 +754,7 @@ CFX_ByteString CFX_ByteString::Right(FX_STRSIZE nCount) const
return *this;
}
CFX_ByteString dest;
- AllocCopy(dest, nCount, m_pData->m_nDataLength - nCount, 0);
+ AllocCopy(dest, nCount, m_pData->m_nDataLength - nCount);
return dest;
}
CFX_ByteString CFX_ByteString::Left(FX_STRSIZE nCount) const
@@ -763,7 +769,7 @@ CFX_ByteString CFX_ByteString::Left(FX_STRSIZE nCount) const
return *this;
}
CFX_ByteString dest;
- AllocCopy(dest, nCount, 0, 0);
+ AllocCopy(dest, nCount, 0);
return dest;
}
FX_STRSIZE CFX_ByteString::Find(FX_CHAR ch, FX_STRSIZE nStart) const
diff --git a/core/src/fxcrt/fx_basic_wstring.cpp b/core/src/fxcrt/fx_basic_wstring.cpp
index 7af3303ca2..68a65d5b6b 100644
--- a/core/src/fxcrt/fx_basic_wstring.cpp
+++ b/core/src/fxcrt/fx_basic_wstring.cpp
@@ -5,15 +5,26 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "../../include/fxcrt/fx_basic.h"
+#include "../../../third_party/numerics/safe_math.h"
+
static CFX_StringDataW* FX_AllocStringW(int nLen)
{
- if (nLen == 0) {
+ if (nLen == 0 || nLen < 0) {
return NULL;
}
- CFX_StringDataW* pData = (CFX_StringDataW*)FX_Alloc(FX_BYTE, sizeof(long) * 3 + (nLen + 1) * sizeof(FX_WCHAR));
+
+ base::CheckedNumeric<int> iSize = static_cast<int>(sizeof(FX_WCHAR));
+ iSize *= nLen + 1;
+ iSize += sizeof(long) * 3;
+ CFX_StringDataW* pData = (CFX_StringDataW*)FX_Alloc(FX_BYTE, iSize.ValueOrDie());
if (!pData) {
return NULL;
}
+
+ // TODO(palmer): |nLen| should really be declared as |size_t|, but for
+ // now I just want to fix the overflow without changing any interfaces.
+ // Declaring |nLen| as |size_t| will also simplify the above code
+ // somewhat.
pData->m_nAllocLength = nLen;
pData->m_nDataLength = nLen;
pData->m_nRefs = 1;
@@ -421,17 +432,19 @@ CFX_WideString CFX_WideString::FromUTF16LE(const unsigned short* wstr, FX_STRSIZ
result.ReleaseBuffer(wlen);
return result;
}
-void CFX_WideString::AllocCopy(CFX_WideString& dest, FX_STRSIZE nCopyLen, FX_STRSIZE nCopyIndex,
- FX_STRSIZE nExtraLen) const
+void CFX_WideString::AllocCopy(CFX_WideString& dest, FX_STRSIZE nCopyLen, FX_STRSIZE nCopyIndex) const
{
- FX_STRSIZE nNewLen = nCopyLen + nExtraLen;
- if (nNewLen == 0) {
+ // |FX_STRSIZE| is currently typedef'd as in |int|. TODO(palmer): It
+ // should be a |size_t|, or at least unsigned.
+ if (nCopyLen == 0 || nCopyLen < 0) {
return;
}
+ base::CheckedNumeric<FX_STRSIZE> iSize = static_cast<FX_STRSIZE>(sizeof(FX_WCHAR));
+ iSize *= nCopyLen;
ASSERT(dest.m_pData == NULL);
- dest.m_pData = FX_AllocStringW(nNewLen);
+ dest.m_pData = FX_AllocStringW(nCopyLen);
if (dest.m_pData) {
- FXSYS_memcpy32(dest.m_pData->m_String, m_pData->m_String + nCopyIndex, nCopyLen * sizeof(FX_WCHAR));
+ FXSYS_memcpy32(dest.m_pData->m_String, m_pData->m_String + nCopyIndex, iSize.ValueOrDie());
}
}
CFX_WideString CFX_WideString::Left(FX_STRSIZE nCount) const
@@ -446,7 +459,7 @@ CFX_WideString CFX_WideString::Left(FX_STRSIZE nCount) const
return *this;
}
CFX_WideString dest;
- AllocCopy(dest, nCount, 0, 0);
+ AllocCopy(dest, nCount, 0);
return dest;
}
CFX_WideString CFX_WideString::Mid(FX_STRSIZE nFirst) const
@@ -474,7 +487,7 @@ CFX_WideString CFX_WideString::Mid(FX_STRSIZE nFirst, FX_STRSIZE nCount) const
return *this;
}
CFX_WideString dest;
- AllocCopy(dest, nCount, nFirst, 0);
+ AllocCopy(dest, nCount, nFirst);
return dest;
}
CFX_WideString CFX_WideString::Right(FX_STRSIZE nCount) const
@@ -489,7 +502,7 @@ CFX_WideString CFX_WideString::Right(FX_STRSIZE nCount) const
return *this;
}
CFX_WideString dest;
- AllocCopy(dest, nCount, m_pData->m_nDataLength - nCount, 0);
+ AllocCopy(dest, nCount, m_pData->m_nDataLength - nCount);
return dest;
}
int CFX_WideString::CompareNoCase(FX_LPCWSTR lpsz) const
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 01:18:46 +0000