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ips_layer: Deduplicate resource usage

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This commit is contained in:
Zach Hilman
2018-10-01 17:17:08 -04:00
parent 9669cdb710
commit 70bd2bb1d3
5 changed files with 39 additions and 33 deletions
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48
src/core/file_sys/ips_layer.cpp
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@ -17,9 +17,10 @@ enum class IPSFileType {
Error,
};
const std::map<const char*, const char*> ESCAPE_CHARACTER_MAP{
{"\\a", "\a"}, {"\\b", "\b"}, {"\\f", "\f"}, {"\\n", "\n"}, {"\\r", "\r"}, {"\\t", "\t"},
{"\\v", "\v"}, {"\\\\", "\\"}, {"\\\'", "\'"}, {"\\\"", "\""}, {"\\\?", "\?"},
constexpr std::array<std::pair<const char*, const char*>, 11> ESCAPE_CHARACTER_MAP{
std::pair{"\\a", "\a"}, {"\\b", "\b"}, {"\\f", "\f"}, {"\\n", "\n"},
{"\\r", "\r"}, {"\\t", "\t"}, {"\\v", "\v"}, {"\\\\", "\\"},
{"\\\'", "\'"}, {"\\\"", "\""}, {"\\\?", "\?"},
};
static IPSFileType IdentifyMagic(const std::vector<u8>& magic) {
@ -92,12 +93,12 @@ VirtualFile PatchIPS(const VirtualFile& in, const VirtualFile& ips) {
return std::make_shared<VectorVfsFile>(in_data, in->GetName(), in->GetContainingDirectory());
}
IPSwitchCompiler::IPSwitchCompiler(VirtualFile patch_text_)
: valid(false), patch_text(std::move(patch_text_)), nso_build_id{}, is_little_endian(false),
offset_shift(0), print_values(false), last_comment("") {
IPSwitchCompiler::IPSwitchCompiler(VirtualFile patch_text_) : patch_text(std::move(patch_text_)) {
Parse();
}
IPSwitchCompiler::~IPSwitchCompiler() = default;
std::array<u8, 32> IPSwitchCompiler::GetBuildID() const {
return nso_build_id;
}
@ -106,7 +107,7 @@ bool IPSwitchCompiler::IsValid() const {
return valid;
}
static bool StartsWith(const std::string& base, const std::string& check) {
static bool StartsWith(std::string_view base, std::string_view check) {
return base.size() >= check.size() && base.substr(0, check.size()) == check;
}
@ -128,21 +129,22 @@ void IPSwitchCompiler::Parse() {
s.write(reinterpret_cast<const char*>(bytes.data()), bytes.size());
std::vector<std::string> lines;
std::string line;
while (std::getline(s, line)) {
std::string stream_line;
while (std::getline(s, stream_line)) {
// Remove a trailing \r
if (!line.empty() && line[line.size() - 1] == '\r')
line = line.substr(0, line.size() - 1);
lines.push_back(line);
if (!stream_line.empty() && stream_line.back() == '\r')
stream_line.pop_back();
lines.push_back(std::move(stream_line));
}
for (std::size_t i = 0; i < lines.size(); ++i) {
auto line = lines[i];
// Remove midline comments
if (!StartsWith(line, "//") && line.find("//") != std::string::npos) {
last_comment = line.substr(line.find("//") + 2);
line = line.substr(0, line.find("//"));
const auto comment_index = line.find("//");
if (!StartsWith(line, "//") && comment_index != std::string::npos) {
last_comment = line.substr(comment_index + 2);
line = line.substr(0, comment_index);
}
if (StartsWith(line, "@stop")) {
@ -191,28 +193,28 @@ void IPSwitchCompiler::Parse() {
while (true) {
if (i + 1 >= lines.size())
break;
line = lines[++i];
const auto patch_line = lines[++i];
// 11 - 8 hex digit offset + space + minimum two digit overwrite val
if (line.length() < 11)
if (patch_line.length() < 11)
break;
auto offset = std::stoul(line.substr(0, 8), nullptr, 16);
auto offset = std::stoul(patch_line.substr(0, 8), nullptr, 16);
offset += offset_shift;
std::vector<u8> replace;
// 9 - first char of replacement val
if (line[9] == '\"') {
if (patch_line[9] == '\"') {
// string replacement
const auto end_index = line.find('\"', 10);
const auto end_index = patch_line.find('\"', 10);
if (end_index == std::string::npos || end_index < 10)
return;
auto value = line.substr(10, end_index - 10);
auto value = patch_line.substr(10, end_index - 10);
value = EscapeStringSequences(value);
replace.reserve(value.size());
std::copy(value.begin(), value.end(), std::back_inserter(replace));
} else {
// hex replacement
const auto value = line.substr(9);
const auto value = patch_line.substr(9);
replace.reserve(value.size() / 2);
replace = Common::HexStringToVector(value, is_little_endian);
}
@ -224,7 +226,7 @@ void IPSwitchCompiler::Parse() {
patch_text->GetName(), offset, Common::HexVectorToString(replace));
}
patch.records.emplace(offset, replace);
patch.records.emplace(offset, std::move(replace));
}
patches.push_back(std::move(patch));