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优化代码，网关C测试通过

This commit is contained in:
nnhy 2015-10-24 07:48:41 +00:00
parent 60ff32075f
commit edf407cc67
1 changed files with 11 additions and 8 deletions
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19
Config.cpp
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@ -5,13 +5,13 @@
Config* Config::Current = NULL;
// 配置块。名称、长度、头部校验，数据部分不做校验，方便外部修改
class ConfigBlock
struct ConfigBlock
{
public:
ushort HeaderCRC;
ushort Size;
char Name[4];
ushort GetHash() const;
bool Valid() const;
const ConfigBlock* Next() const;
@ -21,12 +21,15 @@ public:
bool Write(Storage* storage, uint addr, const ByteArray& bs);
};
bool ConfigBlock::Valid() const
ushort ConfigBlock::GetHash() const
{
// 计算头部 CRC。从数据CRC开始，包括大小和名称
ushort crc = Crc::Hash16(&Size, sizeof(*this) - offsetof(ConfigBlock, Size));
return Crc::Hash16(&Size, sizeof(*this) - offsetof(ConfigBlock, Size));
}
return crc == HeaderCRC;
bool ConfigBlock::Valid() const
{
return GetHash() == HeaderCRC;
}
const ConfigBlock* ConfigBlock::Next() const
@ -34,7 +37,7 @@ const ConfigBlock* ConfigBlock::Next() const
if(!Valid()) return NULL;
// 确保数据部分2字节对齐，便于Flash操作
uint s = (Size + 1) & ~1;
uint s = (Size + 1) & 0xFFFE;
return (const ConfigBlock*)((byte*)Data() + s);
}
@ -49,6 +52,7 @@ const void* ConfigBlock::Data() const
bool ConfigBlock::Init(const char* name, const ByteArray& bs)
{
if(name == NULL) return false;
uint slen = strlen(name);
if(slen > sizeof(Name)) return false;
@ -58,8 +62,7 @@ bool ConfigBlock::Init(const char* name, const ByteArray& bs)
memset(Name, 0, ArrayLength(Name));
memcpy(Name, name, slen);
// 计算头部CRC。包括数据CRC、大小、名称
HeaderCRC = Crc::Hash16(&Size, sizeof(*this) - offsetof(ConfigBlock, Size));
HeaderCRC = GetHash();
return true;
}