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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "Sim/Misc/GlobalConstants.h"
#include "CobFile.h"
#include "System/FileSystem/FileHandler.h"
#include "System/Log/ILog.h"
#include "System/Sound/ISound.h"
#include "System/Platform/byteorder.h"
#include "System/StringUtil.h"
#include <algorithm>
#include <locale>
#include <cctype>
#include <cstring>
//The following structure is taken from http://visualta.tauniverse.com/Downloads/ta-cob-fmt.txt
//Information on missing fields from Format_Cob.pas
typedef struct tagCOBHeader
{
int VersionSignature;
int NumberOfScripts;
int NumberOfPieces;
int TotalScriptLen;
int NumberOfStaticVars;
int Unknown_2; /* Always seems to be 0 */
int OffsetToScriptCodeIndexArray;
int OffsetToScriptNameOffsetArray;
int OffsetToPieceNameOffsetArray;
int OffsetToScriptCode;
int Unknown_3; /* Always seems to point to first script name */
int OffsetToSoundNameArray; // These two are only found in TA:K scripts
int NumberOfSounds;
} COBHeader;
#define READ_COBHEADER(ch,src) \
do { \
unsigned int __tmp; \
unsigned short __isize = sizeof(unsigned int); \
unsigned int __c = 0; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).VersionSignature = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).NumberOfScripts = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).NumberOfPieces = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).TotalScriptLen = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).NumberOfStaticVars = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).Unknown_2 = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).OffsetToScriptCodeIndexArray = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).OffsetToScriptNameOffsetArray = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).OffsetToPieceNameOffsetArray = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).OffsetToScriptCode = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).Unknown_3 = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).OffsetToSoundNameArray = (int)swabDWord(__tmp); \
__c+=__isize; \
memcpy(&__tmp,&((src)[__c]),__isize); \
(ch).NumberOfSounds = (int)swabDWord(__tmp); \
} while (0)
static std::vector<uint8_t> cobFileData;
CCobFile::CCobFile(CFileHandler& in, const std::string& scriptName)
{
name.assign(scriptName);
scriptIndex.fill(-1);
// handle errors (this is fairly fatal..)
if (in.FileSize() < 0) {
LOG_L(L_FATAL, "[%s] could not find script \"%s\"", __func__, name.c_str());
return;
}
if (!in.IsBuffered()) {
cobFileData.clear();
cobFileData.resize(in.FileSize());
// read the entire thing, we will need it
in.Read(cobFileData.data(), cobFileData.size());
} else {
cobFileData = std::move(in.GetBuffer());
}
// time to parse
COBHeader ch;
READ_COBHEADER(ch, cobFileData.data());
if (ch.NumberOfScripts == 0) {
LOG_L(L_WARNING, "[%s] script \"%s\" is empty", __func__, name.c_str());
return;
}
// prepare
luaScripts.reserve(ch.NumberOfScripts);
scriptNames.reserve(ch.NumberOfScripts);
scriptOffsets.reserve(ch.NumberOfScripts);
scriptLengths.reserve(ch.NumberOfScripts);
pieceNames.reserve(ch.NumberOfPieces);
for (int i = 0; i < ch.NumberOfScripts; ++i) {
int ofs = *(int *) &cobFileData[ch.OffsetToScriptNameOffsetArray + i * 4];
swabDWordInPlace(ofs);
scriptNames.emplace_back(reinterpret_cast<const char*>(&cobFileData[ofs]));
if (scriptNames[scriptNames.size() - 1].find("lua_") == 0) {
luaScripts.emplace_back(scriptNames[scriptNames.size() - 1].c_str() + sizeof("lua_") - 1);
} else {
luaScripts.emplace_back("");
}
ofs = *(int *) &cobFileData[ch.OffsetToScriptCodeIndexArray + i * 4];
swabDWordInPlace(ofs);
scriptOffsets.push_back(ofs);
}
// check for zero-length scripts
for (int i = 0; i < ch.NumberOfScripts - 1; ++i) {
scriptLengths.push_back(scriptOffsets[i + 1] - scriptOffsets[i]);
}
scriptLengths.push_back(ch.TotalScriptLen - scriptOffsets[ch.NumberOfScripts - 1]);
for (int i = 0; i < ch.NumberOfPieces; ++i) {
int ofs = *(int *) &cobFileData[ch.OffsetToPieceNameOffsetArray + i * 4];
swabDWordInPlace(ofs);
pieceNames.emplace_back(StringToLower(reinterpret_cast<const char*>(&cobFileData[ofs])));
}
const int codeBytes = int(cobFileData.size()) - ch.OffsetToScriptCode;
const int codeWords = codeBytes / 4 + 4;
code.resize(codeWords);
memcpy(code.data(), &cobFileData[ch.OffsetToScriptCode], codeBytes);
for (int i = 0; i < codeWords; i++) {
swabDWordInPlace(code[i]);
}
numStaticVars = ch.NumberOfStaticVars;
// if this is a TA:K script, read the sound names
if (ch.VersionSignature == 6) {
sounds.reserve(ch.NumberOfSounds);
for (int i = 0; i < ch.NumberOfSounds; ++i) {
int ofs = *(int *) &cobFileData[ch.OffsetToSoundNameArray + i * 4];
// FIXME: this probably isn't correct
swabDWordInPlace(ofs);
const std::string s = {reinterpret_cast<const char*>(&cobFileData[ofs])};
if (sound->HasSoundItem(s)) {
sounds.push_back(sound->GetSoundId(s));
} else {
// Load the wave file and store the ID for future use
sounds.push_back(sound->GetSoundId("sounds/" + s + ".wav"));
}
}
}
// create a reverse mapping (name->int)
for (size_t i = 0, n = scriptNames.size(); i < n; ++i) {
scriptMap[scriptNames[i]] = i;
}
// map common function names to indices
for (const auto& pair: CCobUnitScriptNames::GetScriptMap()) {
const int fn = GetFunctionId(pair.first);
if (fn < 0)
continue;
scriptIndex[pair.second] = fn;
}
}
int CCobFile::GetFunctionId(const std::string& name)
{
const auto i = scriptMap.find(name);
if (i != scriptMap.end())
return i->second;
return -1;
}
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