amxmodx/modules/nvault/Journal.cpp

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// vim: set ts=4 sw=4 tw=99 noet:
//
// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
// Copyright (C) The AMX Mod X Development Team.
//
// This software is licensed under the GNU General Public License, version 3 or higher.
// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
// https://alliedmods.net/amxmodx-license
//
// NVault Module
//
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#include <stdio.h>
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#include <stdarg.h>
#if defined(__linux__) || defined(__APPLE__)
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#include <unistd.h>
#endif
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#include "Journal.h"
Journal::Journal(const char *file)
{
m_File = file;
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}
bool Journal::Erase()
{
return (unlink(m_File.chars()) == 0);
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}
int Journal::Replay(VaultMap *pMap)
{
m_fp = fopen(m_File.chars(), "rb");
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if (!m_fp)
{
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return -1;
}
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BinaryReader br(m_fp);
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uint8_t len8;
uint16_t len16;
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char *key = NULL;
char *val = NULL;
ke::AString sKey;
ke::AString sVal;
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time_t stamp;
JOp op;
int ops = 0;
uint8_t temp8;
uint32_t itemp;
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// try
// {
do
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{
if (!br.ReadUInt8(temp8)) goto fail;
op = static_cast<JOp>(temp8);
if (op == Journal_Clear)
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{
pMap->clear();
}
else if (op == Journal_Prune)
{
time_t start;
time_t end;
if (!br.ReadUInt32(itemp)) goto fail;
start = static_cast<time_t>(itemp);
if (!br.ReadUInt32(itemp)) goto fail;
end = static_cast<time_t>(itemp);
for (StringHashMap<ArrayInfo>::iterator iter = pMap->iter(); !iter.empty(); iter.next())
{
time_t stamp = iter->value.stamp;
bool remove = false;
if (stamp != 0)
{
if (start == 0 && end == 0)
remove = true;
else if (start == 0 && stamp < end)
remove = true;
else if (end == 0 && stamp > start)
remove = true;
else if (stamp > start && stamp < end)
remove = true;
if (remove)
{
iter.erase();
}
}
}
}
else if (op == Journal_Insert)
{
if (!br.ReadUInt32(itemp)) goto fail;
stamp = static_cast<time_t>(itemp);
if (!br.ReadUInt8(len8)) goto fail;
key = new char[len8+1];
if (!br.ReadChars(key, len8)) goto fail;
if (!br.ReadUInt16(len16)) goto fail;
val = new char[len16+1];
if (!br.ReadChars(val, len16)) goto fail;
key[len8] = '\0';
val[len16] = '\0';
ArrayInfo info; info.value = val; info.stamp = stamp;
pMap->replace(key, info);
//clean up
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delete [] key;
key = NULL;
delete [] val;
val = NULL;
} else if (op == Journal_Remove) {
if (!br.ReadUInt8(len8)) goto fail;
key = new char[len8+1];
if (!br.ReadChars(key, len8)) goto fail;
key[len8] = '\0';
pMap->remove(key);
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}
ops++;
} while (op < Journal_TotalOps && op);
goto success;
// } catch (...) {
fail:
//journal is done
if (key)
{
delete [] key;
key = NULL;
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}
if (val)
{
delete [] val;
val = NULL;
}
// }
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success:
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fclose(m_fp);
return ops;
}
bool Journal::Begin()
{
m_fp = fopen(m_File.chars(), "wb");
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m_Bw.SetFilePtr(m_fp);
return (m_fp != NULL);
}
bool Journal::End()
{
if (m_fp)
fclose(m_fp);
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m_Bw.SetFilePtr(NULL);
return true;
}
bool Journal::Write_Clear()
{
// try
// {
if (!WriteOp(Journal_Clear)) goto fail;
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return true;
// } catch (...) {
fail:
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return false;
// }
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}
bool Journal::Write_Insert(const char *key, const char *val, time_t stamp)
{
// try
// {
if (!WriteOp(Journal_Insert)) goto fail;
if (!WriteInt32(static_cast<int32_t>(stamp))) goto fail;
if (!WriteString(key, Encode_Small)) goto fail;
if (!WriteString(val, Encode_Medium)) goto fail;
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return true;
// } catch (...) {
fail:
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return false;
// }
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}
bool Journal::Write_Prune(time_t start, time_t end)
{
// try
// {
if (!WriteOp(Journal_Prune)) goto fail;
if (!WriteInt32(static_cast<int32_t>(start))) goto fail;
if (!WriteInt32(static_cast<int32_t>(end))) goto fail;
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return true;
// } catch (...) {
fail:
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return false;
// }
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}
bool Journal::Write_Remove(const char *key)
{
// try
// {
if (!WriteOp(Journal_Remove)) goto fail;
if (!WriteString(key, Encode_Small)) goto fail;
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return true;
// } catch (...) {
fail:
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return false;
// }
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}
bool Journal::WriteInt32(int num)
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{
return m_Bw.WriteInt32(num);
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}
bool Journal::WriteOp(JOp op)
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{
return m_Bw.WriteUInt8(static_cast<uint8_t>(op));
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}
bool Journal::WriteString(const char *str, Encode enc)
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{
size_t len = strlen(str);
if (enc == Encode_Small)
{
if (!m_Bw.WriteUInt8(static_cast<uint8_t>(len))) return false;
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} else if (enc == Encode_Medium) {
if (!m_Bw.WriteUInt16(static_cast<uint16_t>(len))) return false;
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}
return m_Bw.WriteChars(str, len);
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}