amxmodx/dlls/nvault/Journal.cpp
2006-06-04 07:49:07 +00:00

182 lines
3.0 KiB
C++
Executable File

#include <stdio.h>
#if defined __linux__
#include <unistd.h>
#endif
#include "Journal.h"
Journal::Journal(const char *file)
{
m_File.assign(file);
}
bool Journal::Erase()
{
return (unlink(m_File.c_str()) == 0);
}
int Journal::Replay(VaultMap *pMap)
{
m_fp = fopen(m_File.c_str(), "rb");
if (!m_fp)
return -1;
BinaryReader br(m_fp);
int8_t len8;
int16_t len16;
char *key = NULL;
char *val = NULL;
String sKey;
String sVal;
time_t stamp;
JOp op;
int ops = 0;
try
{
do
{
op = static_cast<JOp>(br.ReadUInt8());
if (op == Journal_Clear)
{
pMap->Clear();
} else if (op == Journal_Prune) {
time_t start;
time_t end;
start = static_cast<time_t>(br.ReadUInt32());
end = static_cast<time_t>(br.ReadUInt32());
pMap->Prune(start, end);
} else if (op == Journal_Insert) {
stamp = static_cast<time_t>(br.ReadUInt32());
len8 = br.ReadUInt8();
key = new char[len8+1];
br.ReadChars(key, len8);
len16 = br.ReadUInt16();
val = new char[len16+1];
br.ReadChars(val, len16);
key[len8] = '\0';
val[len16] = '\0';
sKey.assign(key);
sVal.assign(val);
pMap->Insert(sKey, sVal, stamp);
//clean up
delete [] key;
key = NULL;
delete [] val;
val = NULL;
} else if (op == Journal_Remove) {
len8 = br.ReadUInt8();
key = new char[len8+1];
br.ReadChars(key, len8);
key[len8] = '\0';
sKey.assign(key);
pMap->Remove(sKey);
}
ops++;
} while (op < Journal_TotalOps && op);
} catch (...) {
//journal is done
if (key)
{
delete [] key;
key = NULL;
}
if (val)
{
delete [] val;
val = NULL;
}
}
fclose(m_fp);
return ops;
}
bool Journal::Begin()
{
m_fp = fopen(m_File.c_str(), "wb");
m_Bw.SetFilePtr(m_fp);
return (m_fp != NULL);
}
bool Journal::End()
{
fclose(m_fp);
m_Bw.SetFilePtr(NULL);
return true;
}
bool Journal::Write_Clear()
{
try
{
WriteOp(Journal_Clear);
return true;
} catch (...) {
return false;
}
}
bool Journal::Write_Insert(const char *key, const char *val, time_t stamp)
{
try
{
WriteOp(Journal_Insert);
WriteInt32(static_cast<int32_t>(stamp));
WriteString(key, Encode_Small);
WriteString(val, Encode_Medium);
return true;
} catch (...) {
return false;
}
}
bool Journal::Write_Prune(time_t start, time_t end)
{
try
{
WriteOp(Journal_Prune);
WriteInt32(static_cast<int32_t>(start));
WriteInt32(static_cast<int32_t>(end));
return true;
} catch (...) {
return false;
}
}
bool Journal::Write_Remove(const char *key)
{
try
{
WriteOp(Journal_Remove);
WriteString(key, Encode_Small);
return true;
} catch (...) {
return false;
}
}
void Journal::WriteInt32(int num)
{
m_Bw.WriteInt32(num);
}
void Journal::WriteOp(JOp op)
{
m_Bw.WriteUInt8(static_cast<uint8_t>(op));
}
void Journal::WriteString(const char *str, Encode enc)
{
size_t len = strlen(str);
if (enc == Encode_Small)
{
m_Bw.WriteUInt8(static_cast<uint8_t>(len));
} else if (enc == Encode_Medium) {
m_Bw.WriteUInt16(static_cast<uint16_t>(len));
}
m_Bw.WriteChars(str, len);
}