Fixed a divide by zero error in the hash functions

1 files changed, 42 insertions, 6 deletions

diff --git a/Source/Core/Common/Src/Hash.cpp b/Source/Core/Common/Src/Hash.cpp
index 62ea25519e..46747ce157 100644
--- a/Source/Core/Common/Src/Hash.cpp
+++ b/Source/Core/Common/Src/Hash.cpp
@@ -167,7 +167,13 @@ u64 GetMurmurHash3(const u8 *src, int len, u32 samples)
     const u8 * data = (const u8*)src;
     const int nblocks = len / 16;
 	u32 Step = (len / 8);
-	if(samples == 0) samples = Step;
+	if(samples == 0)
+	{
+		if (Step == 0)
+			samples = 1;
+		else
+			samples = Step;
+	}
 	Step = Step / samples;
 	if(Step < 1) Step = 1;
 
@@ -245,7 +251,13 @@ u64 GetCRC32(const u8 *src, int len, u32 samples)
 	u32 Step = (len / 8);
 	const u64 *data = (const u64 *)src;
 	const u64 *end = data + Step;
-	if(samples == 0) samples = Step;
+	if(samples == 0)
+	{
+		if (Step == 0)
+			samples = 1;
+		else
+			samples = Step;
+	}
 	Step = Step / samples;
 	if(Step < 1) Step = 1;
 	while(data < end)
@@ -275,7 +287,13 @@ u64 GetHashHiresTexture(const u8 *src, int len, u32 samples)
 	u32 Step = (len / 8);
 	const u64 *data = (const u64 *)src;
 	const u64 *end = data + Step;
-	if(samples == 0) samples = Step;
+	if(samples == 0)
+	{
+		if (Step == 0)
+			samples = 1;
+		else
+			samples = Step;
+	}
 	Step = Step / samples;
 	if(Step < 1) Step = 1;
 	while(data < end)
@@ -318,7 +336,13 @@ u64 GetCRC32(const u8 *src, int len, u32 samples)
 	u32 Step = (len/4);
 	const u32 *data = (const u32 *)src;
 	const u32 *end = data + Step;
-	if(samples == 0) samples = Step;
+	if(samples == 0)
+	{
+		if (Step == 0)
+			samples = 1;
+		else
+			samples = Step;
+	}
 	Step  = Step / samples;
 	if(Step < 1) Step = 1;
 	while(data < end)
@@ -390,7 +414,13 @@ u64 GetMurmurHash3(const u8* src, int len, u32 samples)
 	u32 out[2];
 	const int nblocks = len / 8;
 	u32 Step = (len / 4);
-	if(samples == 0) samples = Step;
+	if(samples == 0)
+	{
+		if (Step == 0)
+			samples = 1;
+		else
+			samples = Step;
+	}
 	Step = Step / samples;
 	if(Step < 1) Step = 1;
 
@@ -464,7 +494,13 @@ u64 GetHashHiresTexture(const u8 *src, int len, u32 samples)
 	u32 Step = (len / 8);
 	const u64 *data = (const u64 *)src;
 	const u64 *end = data + Step;
-	if(samples == 0) samples = Step;
+	if(samples == 0)
+	{
+		if (Step == 0)
+			samples = 1;
+		else
+			samples = Step;
+	}
 	Step = Step / samples;
 	if(Step < 1) Step = 1;
 	while(data < end)