noise: Throw exception on noise allocation failure

src/exceptions.h

@@ -125,6 +125,18 @@ public:
 	Some "old-style" interrupts:
 */
 
+class InvalidNoiseParamsException : public BaseException {
+public:
+	InvalidNoiseParamsException():
+		BaseException("One or more noise parameters were invalid or require "
+			"too much memory")
+	{}
+
+	InvalidNoiseParamsException(const std::string &s):
+		BaseException(s)
+	{}
+};
+
 class InvalidPositionException : public BaseException
 {
 public:

src/noise.cpp

@@ -29,6 +29,7 @@
 #include <string.h> // memset
 #include "debug.h"
 #include "util/numeric.h"
+#include "exceptions.h"
 
 #define NOISE_MAGIC_X    1619
 #define NOISE_MAGIC_Y    31337
@@ -336,8 +337,12 @@ Noise::Noise(NoiseParams *np, int seed, int sx, int sy, int sz)
 	this->noisebuf = NULL;
 	resizeNoiseBuf(sz > 1);
 
+	try {
 		this->buf    = new float[sx * sy * sz];
 		this->result = new float[sx * sy * sz];
+	} catch (std::bad_alloc &e) {
+		throw InvalidNoiseParamsException();
+	}
 }
 
 
@@ -360,8 +365,12 @@ void Noise::setSize(int sx, int sy, int sz)
 
 	delete[] buf;
 	delete[] result;
+	try {
 		this->buf    = new float[sx * sy * sz];
 		this->result = new float[sx * sy * sz];
+	} catch (std::bad_alloc &e) {
+		throw InvalidNoiseParamsException();
+	}
 }
 
 
@@ -399,7 +408,11 @@ void Noise::resizeNoiseBuf(bool is3d)
 
 	if (noisebuf)
 		delete[] noisebuf;
+	try {
 		noisebuf = new float[nlx * nly * nlz];
+	} catch (std::bad_alloc &e) {
+		throw InvalidNoiseParamsException();
+	}
 }
 
 

src/script/lua_api/l_noise.cpp

@@ -231,7 +231,11 @@ int LuaPerlinNoiseMap::l_get3dMap_flat(lua_State *L)
 }
 
 LuaPerlinNoiseMap::LuaPerlinNoiseMap(NoiseParams *np, int seed, v3s16 size) {
+	try {
 		noise = new Noise(np, seed, size.X, size.Y, size.Z);
+	} catch (InvalidNoiseParamsException &e) {
+		throw LuaError(e.what());
+	}
 }
 
 LuaPerlinNoiseMap::~LuaPerlinNoiseMap()