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-rw-r--r--core/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp12
-rw-r--r--core/fxcodec/jbig2/JBig2_ArithIntDecoder.h5
-rw-r--r--core/fxcodec/jbig2/JBig2_SddProc.cpp22
-rw-r--r--core/fxcodec/jbig2/JBig2_TrdProc.cpp31
4 files changed, 26 insertions, 44 deletions
diff --git a/core/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp b/core/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
index 8ef1e0dc45..7ed7702964 100644
--- a/core/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
+++ b/core/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
@@ -53,9 +53,6 @@ bool CJBig2_ArithIntDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
// Decoding Procedure" on page 113 of the JBIG2 specification (ISO/IEC FCD
// 14492).
int PREV = 1;
- if (pArithDecoder->IsComplete())
- return false;
-
const int S = pArithDecoder->DECODE(&m_IAx[PREV]);
PREV = ShiftOr(PREV, S);
@@ -64,9 +61,6 @@ bool CJBig2_ArithIntDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
int nTemp = 0;
for (int i = 0; i < g_ArithIntDecodeData[nDecodeDataIndex].nNeedBits; ++i) {
- if (pArithDecoder->IsComplete())
- return false;
-
int D = pArithDecoder->DECODE(&m_IAx[PREV]);
PREV = ShiftOr(PREV, D);
if (PREV >= 256)
@@ -98,17 +92,13 @@ CJBig2_ArithIaidDecoder::CJBig2_ArithIaidDecoder(unsigned char SBSYMCODELENA)
CJBig2_ArithIaidDecoder::~CJBig2_ArithIaidDecoder() {}
-bool CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
+void CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
uint32_t* nResult) {
int PREV = 1;
for (unsigned char i = 0; i < SBSYMCODELEN; ++i) {
JBig2ArithCtx* pCX = &m_IAID[PREV];
- if (pArithDecoder->IsComplete())
- return false;
-
int D = pArithDecoder->DECODE(pCX);
PREV = ShiftOr(PREV, D);
}
*nResult = PREV - (1 << SBSYMCODELEN);
- return true;
}
diff --git a/core/fxcodec/jbig2/JBig2_ArithIntDecoder.h b/core/fxcodec/jbig2/JBig2_ArithIntDecoder.h
index 2de42a09ee..fd9fa89f19 100644
--- a/core/fxcodec/jbig2/JBig2_ArithIntDecoder.h
+++ b/core/fxcodec/jbig2/JBig2_ArithIntDecoder.h
@@ -17,7 +17,8 @@ class CJBig2_ArithIntDecoder {
CJBig2_ArithIntDecoder();
~CJBig2_ArithIntDecoder();
- // Returns true on success, and false when an OOB condition occurs.
+ // Returns true on success, and false when an OOB condition occurs. Many
+ // callers can tolerate OOB and do not check the return value.
bool decode(CJBig2_ArithDecoder* pArithDecoder, int* nResult);
private:
@@ -29,7 +30,7 @@ class CJBig2_ArithIaidDecoder {
explicit CJBig2_ArithIaidDecoder(unsigned char SBSYMCODELENA);
~CJBig2_ArithIaidDecoder();
- bool decode(CJBig2_ArithDecoder* pArithDecoder, uint32_t* nResult);
+ void decode(CJBig2_ArithDecoder* pArithDecoder, uint32_t* nResult);
private:
std::vector<JBig2ArithCtx> m_IAID;
diff --git a/core/fxcodec/jbig2/JBig2_SddProc.cpp b/core/fxcodec/jbig2/JBig2_SddProc.cpp
index ee0c0f37f3..a446dbc6c0 100644
--- a/core/fxcodec/jbig2/JBig2_SddProc.cpp
+++ b/core/fxcodec/jbig2/JBig2_SddProc.cpp
@@ -68,9 +68,7 @@ std::unique_ptr<CJBig2_SymbolDict> CJBig2_SDDProc::decode_Arith(
NSYMSDECODED = 0;
while (NSYMSDECODED < SDNUMNEWSYMS) {
std::unique_ptr<CJBig2_Image> BS;
- if (!IADH->decode(pArithDecoder, &HCDH))
- return nullptr;
-
+ IADH->decode(pArithDecoder, &HCDH);
HCHEIGHT = HCHEIGHT + HCDH;
if ((int)HCHEIGHT < 0 || (int)HCHEIGHT > JBIG2_MAX_IMAGE_SIZE)
return nullptr;
@@ -115,8 +113,7 @@ std::unique_ptr<CJBig2_SymbolDict> CJBig2_SDDProc::decode_Arith(
if (!BS)
return nullptr;
} else {
- if (!IAAI->decode(pArithDecoder, reinterpret_cast<int*>(&REFAGGNINST)))
- return nullptr;
+ IAAI->decode(pArithDecoder, (int*)&REFAGGNINST);
if (REFAGGNINST > 1) {
auto pDecoder = pdfium::MakeUnique<CJBig2_TRDProc>();
pDecoder->SBHUFF = SDHUFF;
@@ -189,11 +186,12 @@ std::unique_ptr<CJBig2_SymbolDict> CJBig2_SDDProc::decode_Arith(
} else if (REFAGGNINST == 1) {
SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
uint32_t IDI;
- if (!IAID->decode(pArithDecoder, &IDI) ||
- !IARDX->decode(pArithDecoder, &RDXI) ||
- !IARDY->decode(pArithDecoder, &RDYI) || IDI >= SBNUMSYMS) {
+ IAID->decode(pArithDecoder, &IDI);
+ IARDX->decode(pArithDecoder, &RDXI);
+ IARDY->decode(pArithDecoder, &RDYI);
+ if (IDI >= SBNUMSYMS)
return nullptr;
- }
+
SBSYMS.resize(SBNUMSYMS);
std::copy(SDINSYMS, SDINSYMS + SDNUMINSYMS, SBSYMS.begin());
for (size_t i = 0; i < NSYMSDECODED; ++i)
@@ -227,10 +225,10 @@ std::unique_ptr<CJBig2_SymbolDict> CJBig2_SDDProc::decode_Arith(
EXFLAGS.resize(SDNUMINSYMS + SDNUMNEWSYMS);
num_ex_syms = 0;
while (EXINDEX < SDNUMINSYMS + SDNUMNEWSYMS) {
- if (!IAEX->decode(pArithDecoder, (int*)&EXRUNLENGTH) ||
- EXINDEX + EXRUNLENGTH > SDNUMINSYMS + SDNUMNEWSYMS) {
+ IAEX->decode(pArithDecoder, (int*)&EXRUNLENGTH);
+ if (EXINDEX + EXRUNLENGTH > SDNUMINSYMS + SDNUMNEWSYMS)
return nullptr;
- }
+
if (EXRUNLENGTH != 0) {
for (I = EXINDEX; I < EXINDEX + EXRUNLENGTH; I++) {
if (CUREXFLAG)
diff --git a/core/fxcodec/jbig2/JBig2_TrdProc.cpp b/core/fxcodec/jbig2/JBig2_TrdProc.cpp
index 78eb78012a..332e5868ac 100644
--- a/core/fxcodec/jbig2/JBig2_TrdProc.cpp
+++ b/core/fxcodec/jbig2/JBig2_TrdProc.cpp
@@ -281,9 +281,7 @@ std::unique_ptr<CJBig2_Image> CJBig2_TRDProc::decode_Arith(
for (;;) {
if (bFirst) {
int32_t DFS;
- if (!pIAFS->decode(pArithDecoder, &DFS))
- return nullptr;
-
+ pIAFS->decode(pArithDecoder, &DFS);
FIRSTS += DFS;
CURS = FIRSTS;
bFirst = false;
@@ -299,10 +297,8 @@ std::unique_ptr<CJBig2_Image> CJBig2_TRDProc::decode_Arith(
break;
int CURT = 0;
- if (SBSTRIPS != 1) {
- if (!pIAIT->decode(pArithDecoder, &CURT))
- return nullptr;
- }
+ if (SBSTRIPS != 1)
+ pIAIT->decode(pArithDecoder, &CURT);
FX_SAFE_INT32 SAFE_TI = STRIPT + CURT;
if (!SAFE_TI.IsValid())
@@ -310,16 +306,15 @@ std::unique_ptr<CJBig2_Image> CJBig2_TRDProc::decode_Arith(
int32_t TI = SAFE_TI.ValueOrDie();
uint32_t IDI;
- if (!pIAID->decode(pArithDecoder, &IDI) || IDI >= SBNUMSYMS)
+ pIAID->decode(pArithDecoder, &IDI);
+ if (IDI >= SBNUMSYMS)
return nullptr;
int RI;
- if (SBREFINE == 0) {
+ if (SBREFINE == 0)
RI = 0;
- } else {
- if (!pIARI->decode(pArithDecoder, &RI))
- return nullptr;
- }
+ else
+ pIARI->decode(pArithDecoder, &RI);
MaybeOwned<CJBig2_Image> pIBI;
if (RI == 0) {
@@ -329,12 +324,10 @@ std::unique_ptr<CJBig2_Image> CJBig2_TRDProc::decode_Arith(
int32_t RDHI;
int32_t RDXI;
int32_t RDYI;
- if (!pIARDW->decode(pArithDecoder, &RDWI) ||
- !pIARDH->decode(pArithDecoder, &RDHI) ||
- !pIARDX->decode(pArithDecoder, &RDXI) ||
- !pIARDY->decode(pArithDecoder, &RDYI)) {
- return nullptr;
- }
+ pIARDW->decode(pArithDecoder, &RDWI);
+ pIARDH->decode(pArithDecoder, &RDHI);
+ pIARDX->decode(pArithDecoder, &RDXI);
+ pIARDY->decode(pArithDecoder, &RDYI);
CJBig2_Image* IBOI = SBSYMS[IDI];
if (!IBOI)
return nullptr;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 23:22:23 +0000