+/**
+ * \fn int rand()
+ * \brief Pseudo random number generator
+ */
+int rand(void)
+{
+ #if 0
+ static Uint state = RANDOM_SEED;
+ Uint old = state;
+ // Get the next state value
+ giRandomState = (RANDOM_A*state + RANDOM_C);
+ // Check if it has changed, and if it hasn't, change it
+ if(state == old) state += RANDOM_SPRUCE;
+ return state;
+ #else
+ // http://en.wikipedia.org/wiki/Xorshift
+ // 2010-10-03
+ static Uint32 x = 123456789;
+ static Uint32 y = 362436069;
+ static Uint32 z = 521288629;
+ static Uint32 w = 88675123;
+ Uint32 t;
+
+ t = x ^ (x << 11);
+ x = y; y = z; z = w;
+ return w = w ^ (w >> 19) ^ t ^ (t >> 8);
+ #endif
+}
+
+/* *
+ * \name Memory Validation
+ * \{
+ */
+/**
+ * \brief Checks if a string resides fully in valid memory
+ */
+int CheckString(const char *String)
+{
+ tVAddr addr;
+ int bUser;
+
+ addr = (tVAddr)String;
+
+ if( !MM_GetPhysAddr( addr ) )
+ return 0;
+
+ // Check 1st page
+ bUser = MM_IsUser( addr );
+
+ while( *(char*)addr )
+ {
+ if( (addr & (PAGE_SIZE-1)) == 0 )
+ {
+ if(bUser && !MM_IsUser(addr) )
+ return 0;
+ if(!bUser && !MM_GetPhysAddr(addr) )
+ return 0;
+ }
+ addr ++;
+ }
+ return 1;
+}
+
+/**
+ * \brief Check if a sized memory region is valid memory
+ * \return Boolean success
+ */
+int CheckMem(const void *Mem, int NumBytes)
+{
+ return MM_IsValidBuffer( (tVAddr)Mem, NumBytes );
+}
+/* *
+ * \}
+ */
+
+/**
+ * \brief Search a string array for \a Needle
+ * \note Helper function for eTplDrv_IOCtl::DRV_IOCTL_LOOKUP
+ */
+int ModUtil_LookupString(const char **Array, const char *Needle)
+{
+ int i;
+ if( !CheckString(Needle) ) return -1;
+ for( i = 0; Array[i]; i++ )
+ {
+ if(strcmp(Array[i], Needle) == 0) return i;
+ }
+ return -1;
+}
+
+int ModUtil_SetIdent(char *Dest, const char *Value)
+{
+ if( !CheckMem(Dest, 32) ) return -1;
+ strncpy(Dest, Value, 32);
+ return 1;
+}
+
+/**
+ * \brief Convert a string of hexadecimal digits into a byte stream
+ */
+int UnHex(Uint8 *Dest, size_t DestSize, const char *SourceString)
+{
+ int i;
+
+ for( i = 0; i < DestSize*2; i += 2 )
+ {
+ Uint8 val = 0;
+
+ if(SourceString[i] == '\0') break;
+
+ if('0' <= SourceString[i] && SourceString[i] <= '9')
+ val |= (SourceString[i]-'0') << 4;
+ else if('A' <= SourceString[i] && SourceString[i] <= 'F')
+ val |= (SourceString[i]-'A'+10) << 4;
+ else if('a' <= SourceString[i] && SourceString[i] <= 'f')
+ val |= (SourceString[i]-'a'+10) << 4;
+
+ if(SourceString[i+1] == '\0') break;
+
+ if('0' <= SourceString[i+1] && SourceString[i+1] <= '9')
+ val |= (SourceString[i+1] - '0');
+ else if('A' <= SourceString[i+1] && SourceString[i+1] <= 'F')
+ val |= (SourceString[i+1] - 'A' + 10);
+ else if('a' <= SourceString[i+1] && SourceString[i+1] <= 'f')
+ val |= (SourceString[i+1] - 'a' + 10);
+
+ Dest[i/2] = val;
+ }
+ return i/2;
+}
+
+Uint16 SwapEndian16(Uint16 Val)
+{
+ return ((Val&0xFF)<<8) | ((Val>>8)&0xFF);
+}
+Uint32 SwapEndian32(Uint32 Val)
+{
+ return ((Val&0xFF)<<24) | ((Val&0xFF00)<<8) | ((Val>>8)&0xFF00) | ((Val>>24)&0xFF);
+}
+
+void *memmove(void *__dest, const void *__src, size_t len)
+{
+ size_t block_size;
+ char *dest = __dest;
+ const char *src = __src;
+ void *ret = __dest;
+
+ if( len == 0 || dest == src )
+ return dest;
+
+ if( (tVAddr)dest > (tVAddr)src + len )
+ return memcpy(dest, src, len);
+ if( (tVAddr)dest + len < (tVAddr)src )
+ return memcpy(dest, src, len);
+
+ // NOTE: Assumes memcpy works forward
+ if( (tVAddr)dest < (tVAddr)src )
+ return memcpy(dest, src, len);
+
+ if( (tVAddr)dest < (tVAddr)src )
+ block_size = (tVAddr)src - (tVAddr)dest;
+ else
+ block_size = (tVAddr)dest - (tVAddr)src;
+
+ block_size &= ~0xF;
+
+ while(len >= block_size)
+ {
+ memcpy(dest, src, block_size);
+ len -= block_size;
+ dest += block_size;
+ src += block_size;
+ }
+ memcpy(dest, src, len);
+ return ret;
+
+}
+