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/* Starshatter: The Open Source Project
Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
Copyright (c) 1997-2006, Destroyer Studios LLC.
*/
#include "DataSource.h"
#include <cstdint>
#include <cstring>
#include <filesystem>
#include "Archive.h"
#include "List.h"
#include "Text.h"
DataSource::DataSource() :
m_prefix {""}
{
}
DataSource::~DataSource()
{
}
void
DataSource::SetPrefix(const char* prefix)
{
if (prefix)
m_prefix = prefix;
else
m_prefix = "";
}
ArchiveDataSource::ArchiveDataSource(const char* name) :
ArchiveDataSource(new DataArchive(name))
{
}
ArchiveDataSource::ArchiveDataSource(DataArchive* archive) :
m_archive {archive}
{
}
ArchiveDataSource::~ArchiveDataSource()
{
delete m_archive;
}
bool
ArchiveDataSource::Find(const char* name) const
{
const int index = m_archive->FindEntry(name);
return index > -1;
}
int
ArchiveDataSource::ListFiles(Text filter, List<Text>& items, bool recurse) const
{
(void) recurse; // Lookup in DataArchives was always recursive so far
filter = filter.replace("*", ""); // Wildcards worked only on boundaries
const int prefix = m_prefix.length();
const int count = m_archive->NumFiles();
for (int i = 0; i < count; ++i) {
const auto* entry = m_archive->GetFile(i);
Text name = entry->name;
name.setSensitive(false);
if (name.contains(m_prefix) && name.contains(filter)) {
const auto without_prefix = name.substring(prefix, name.length());
if (!items.contains(&without_prefix))
items.append(new Text(without_prefix));
}
}
return items.size();
}
int
ArchiveDataSource::Load(const char* name, std::uint8_t*& buf, bool null_terminate) const
{
const int index = m_archive->FindEntry(name);
if (index > -1)
return m_archive->ExpandEntry(index, buf, null_terminate);
return 0; // -1 would be preferable, but 0 is from legacy
}
FileSystemDataSource::FileSystemDataSource(const char* path) :
m_path {path}
{
}
FileSystemDataSource::~FileSystemDataSource()
{
}
bool
FileSystemDataSource::Find(const char* name) const
{
std::filesystem::path full_path {m_path};
full_path.append(m_prefix.data());
full_path.append(name);
return std::filesystem::is_regular_file(full_path);
}
int
FileSystemDataSource::ListFiles(Text filter, List<Text>& items, bool recurse) const
{
std::filesystem::path full_path {m_path};
full_path.append(m_prefix.data());
filter = filter.replace("*", "");
const auto check = [&items, &filter](const std::filesystem::directory_entry& entry){
const auto filename = entry.path().filename().string();
const auto index = filename.find(filter.data());
if (index != decltype(filename)::npos)
items.append(new Text(entry.path().string().c_str()));
};
if (recurse) {
for (const auto& entry : std::filesystem::recursive_directory_iterator(full_path))
check(entry);
}
else {
for (const auto& entry : std::filesystem::directory_iterator(full_path))
check(entry);
}
return items.size();
}
int
FileSystemDataSource::Load(const char* name, std::uint8_t*& buf, bool null_terminate) const
{
std::filesystem::path full_path {m_path};
full_path.append(m_prefix.data());
full_path.append(name);
FILE* f = fopen(full_path.string().c_str(), "rb");
if (!f)
return 0; // Again, -1 would be better to differentiate an error from an empty file
fseek(f, 0, SEEK_END);
int length = ftell(f);
fseek(f, 0, SEEK_SET);
if (null_terminate) {
buf = new std::uint8_t[length + 1];
if (buf)
buf[length] = 0;
}
else {
buf = new std::uint8_t[length];
}
int bytes = 0;
if (buf)
bytes = fread(buf, length, 1, f);
fclose(f);
return bytes;
}
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