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Allow loading of huge files efficiently

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WerWolv
2020-11-22 19:43:35 +01:00
parent 5f025bcbcc
commit 43f5cc622e
8 changed files with 121 additions and 63 deletions
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9
source/provider/file_provider.cpp
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@@ -22,7 +22,6 @@ namespace hex::prv {
this->m_file = fopen(path.data(), "rb");
this->m_writable = false;
}
}
FileProvider::~FileProvider() {
@@ -48,7 +47,7 @@ namespace hex::prv {
if ((offset + size) > this->getSize() || buffer == nullptr || size == 0)
return;
fseeko64(this->m_file, offset, SEEK_SET);
fseeko64(this->m_file, this->getCurrentPage() * PageSize + offset, SEEK_SET);
fread(buffer, 1, size, this->m_file);
}
@@ -56,11 +55,11 @@ namespace hex::prv {
if (buffer == nullptr || size == 0)
return;
fseeko64(this->m_file, offset, SEEK_SET);
fseeko64(this->m_file, this->getCurrentPage() * PageSize + offset, SEEK_SET);
fwrite(buffer, 1, size, this->m_file);
}
size_t FileProvider::getSize() {
size_t FileProvider::getActualSize() {
fseeko64(this->m_file, 0, SEEK_END);
return ftello64(this->m_file);
}
@@ -69,7 +68,7 @@ namespace hex::prv {
std::vector<std::pair<std::string, std::string>> result;
result.emplace_back("File path", this->m_path);
result.emplace_back("Size", hex::toByteString(this->getSize()));
result.emplace_back("Size", hex::toByteString(this->getActualSize()));
if (this->m_fileStatsValid) {
result.emplace_back("Creation time", ctime(&this->m_fileStats.st_ctime));