parse_string.cpp - platform/system/libvintf - Git at Google

 /*
  * Copyright (C) 2017 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 // Convert objects from and to strings.

 #include "parse_string.h"
 #include <android-base/parseint.h>

 namespace android {
 using base::ParseUint;

 namespace vintf {

 static const std::string kRequired("required");
 static const std::string kOptional("optional");
 static const std::string kConfigPrefix("CONFIG_");

 std::vector<std::string> SplitString(const std::string &s, char c) {
     std::vector<std::string> components;

     size_t startPos = 0;
     size_t matchPos;
     while ((matchPos = s.find(c, startPos)) != std::string::npos) {
         components.push_back(s.substr(startPos, matchPos - startPos));
         startPos = matchPos + 1;
     }

     if (startPos <= s.length()) {
         components.push_back(s.substr(startPos));
     }
     return components;
 }

 template <typename T>
 std::ostream &operator<<(std::ostream &os, const std::vector<T> objs) {
     bool first = true;
     for (const T &v : objs) {
         if (!first) {
             os << ",";
         }
         os << v;
         first = false;
     }
     return os;
 }

 template <typename T>
 bool parse(const std::string &s, std::vector<T> *objs) {
     std::vector<std::string> v = SplitString(s, ',');
     objs->resize(v.size());
     size_t idx = 0;
     for (const auto &item : v) {
         T ver;
         if (!parse(item, &ver)) {
             return false;
         }
         objs->at(idx++) = ver;
     }
     return true;
 }

 template<typename E, typename Array>
 bool parseEnum(const std::string &s, E *e, const Array &strings) {
     for (size_t i = 0; i < strings.size(); ++i) {
         if (s == strings.at(i)) {
             *e = static_cast<E>(i);
             return true;
         }
     }
     return false;
 }

 #define DEFINE_PARSE_STREAMIN_FOR_ENUM(ENUM) \
     bool parse(const std::string &s, ENUM *hf) {                   \
         return parseEnum(s, hf, g##ENUM##Strings);                 \
     }                                                              \
     std::ostream &operator<<(std::ostream &os, ENUM hf) {          \
         return os << g##ENUM##Strings.at(static_cast<size_t>(hf)); \
     }                                                              \

 DEFINE_PARSE_STREAMIN_FOR_ENUM(HalFormat);
 DEFINE_PARSE_STREAMIN_FOR_ENUM(Transport);
 DEFINE_PARSE_STREAMIN_FOR_ENUM(Arch);
 DEFINE_PARSE_STREAMIN_FOR_ENUM(KernelConfigType);
 DEFINE_PARSE_STREAMIN_FOR_ENUM(Tristate);
 DEFINE_PARSE_STREAMIN_FOR_ENUM(SchemaType);

 std::ostream &operator<<(std::ostream &os, const KernelConfigTypedValue &kctv) {
     switch (kctv.mType) {
         case KernelConfigType::STRING:
             return os << kctv.mStringValue;
         case KernelConfigType::INTEGER:
             return os << to_string(kctv.mIntegerValue);
         case KernelConfigType::RANGE:
             return os << to_string(kctv.mRangeValue.first) << "-"
                       << to_string(kctv.mRangeValue.second);
         case KernelConfigType::TRISTATE:
             return os << to_string(kctv.mTristateValue);
     }
 }

 // Notice that strtoull is used even though KernelConfigIntValue is signed int64_t,
 // because strtoull can accept negative values as well.
 // Notice that according to man strtoul, strtoull can actually accept
 // -2^64 + 1 to 2^64 - 1, with the 65th bit truncated.
 // ParseInt / ParseUint are not used because they do not handle signed hex very well.
 template <typename T>
 bool parseKernelConfigIntHelper(const std::string &s, T *i) {
     char *end;
     errno = 0;
     unsigned long long int ulli = strtoull(s.c_str(), &end, 0 /* base */);
     // It is implementation defined that what value will be returned by strtoull
     // in the error case, so we are checking errno directly here.
     if (errno == 0 && s.c_str() != end && *end == '\0') {
         *i = static_cast<T>(ulli);
         return true;
     }
     return false;
 }

 bool parseKernelConfigInt(const std::string &s, int64_t *i) {
     return parseKernelConfigIntHelper(s, i);
 }

 bool parseKernelConfigInt(const std::string &s, uint64_t *i) {
     return parseKernelConfigIntHelper(s, i);
 }

 bool parseRange(const std::string &s, KernelConfigRangeValue *range) {
     auto pos = s.find('-');
     if (pos == std::string::npos) {
         return false;
     }
     return parseKernelConfigInt(s.substr(0, pos),  &range->first)
         && parseKernelConfigInt(s.substr(pos + 1), &range->second);
 }

 bool parse(const std::string &s, KernelConfigKey *key) {
     *key = s;
     return true;
 }

 bool parseKernelConfigValue(const std::string &s, KernelConfigTypedValue *kctv) {
     switch (kctv->mType) {
         case KernelConfigType::STRING:
             kctv->mStringValue = s;
             return true;
         case KernelConfigType::INTEGER:
             return parseKernelConfigInt(s, &kctv->mIntegerValue);
         case KernelConfigType::RANGE:
             return parseRange(s, &kctv->mRangeValue);
         case KernelConfigType::TRISTATE:
             return parse(s, &kctv->mTristateValue);
     }
 }

 bool parse(const std::string &s, Version *ver) {
     std::vector<std::string> v = SplitString(s, '.');
     if (v.size() != 2) {
         return false;
     }
     size_t major, minor;
     if (!ParseUint(v[0], &major)) {
         return false;
     }
     if (!ParseUint(v[1], &minor)) {
         return false;
     }
     *ver = Version(major, minor);
     return true;
 }

 std::ostream &operator<<(std::ostream &os, const Version &ver) {
     return os << ver.majorVer << "." << ver.minorVer;
 }

 bool parse(const std::string &s, VersionRange *vr) {
     std::vector<std::string> v = SplitString(s, '-');
     if (v.size() != 1 && v.size() != 2) {
         return false;
     }
     Version minVer;
     if (!parse(v[0], &minVer)) {
         return false;
     }
     if (v.size() == 1) {
         *vr = VersionRange(minVer.majorVer, minVer.minorVer);
     } else {
         size_t maxMinor;
         if (!ParseUint(v[1], &maxMinor)) {
             return false;
         }
         *vr = VersionRange(minVer.majorVer, minVer.minorVer, maxMinor);
     }
     return true;
 }

 std::ostream &operator<<(std::ostream &os, const VersionRange &vr) {
     if (vr.isSingleVersion()) {
         return os << vr.minVer();
     }
     return os << vr.minVer() << "-" << vr.maxMinor;
 }

 bool parse(const std::string &s, VndkVersionRange *vr) {
     std::vector<std::string> v = SplitString(s, '-');
     if (v.size() != 1 && v.size() != 2) {
         return false;
     }
     std::vector<std::string> minVector = SplitString(v[0], '.');
     if (minVector.size() != 3) {
         return false;
     }
     if (!ParseUint(minVector[0], &vr->sdk) ||
         !ParseUint(minVector[1], &vr->vndk) ||
         !ParseUint(minVector[2], &vr->patchMin)) {
         return false;
     }
     if (v.size() == 1) {
         vr->patchMax = vr->patchMin;
         return true;
     } else {
         return ParseUint(v[1], &vr->patchMax);
     }
 }

 std::ostream &operator<<(std::ostream &os, const VndkVersionRange &vr) {
     os << vr.sdk << "." << vr.vndk << "." << vr.patchMin;
     if (!vr.isSingleVersion()) {
         os << "-" << vr.patchMax;
     }
     return os;
 }

 bool parse(const std::string &s, KernelVersion *kernelVersion) {
     std::vector<std::string> v = SplitString(s, '.');
     if (v.size() != 3) {
         return false;
     }
     size_t version, major, minor;
     if (!ParseUint(v[0], &version)) {
         return false;
     }
     if (!ParseUint(v[1], &major)) {
         return false;
     }
     if (!ParseUint(v[2], &minor)) {
         return false;
     }
     *kernelVersion = KernelVersion(version, major, minor);
     return true;
 }

 std::ostream &operator<<(std::ostream &os, const TransportArch &ta) {
     return os << to_string(ta.transport) << to_string(ta.arch);
 }

 bool parse(const std::string &s, TransportArch *ta) {
     bool transportSet = false;
     bool archSet = false;
     for (size_t i = 0; i < gTransportStrings.size(); ++i) {
         if (s.find(gTransportStrings.at(i)) != std::string::npos) {
             ta->transport = static_cast<Transport>(i);
             transportSet = true;
             break;
         }
     }
     if (!transportSet) {
         return false;
     }
     for (size_t i = 0; i < gArchStrings.size(); ++i) {
         if (s.find(gArchStrings.at(i)) != std::string::npos) {
             ta->arch = static_cast<Arch>(i);
             archSet = true;
             break;
         }
     }
     if (!archSet) {
         return false;
     }
     return ta->isValid();
 }

 std::ostream &operator<<(std::ostream &os, const KernelVersion &ver) {
     return os << ver.version << "." << ver.majorRev << "." << ver.minorRev;
 }

 bool parse(const std::string &s, ManifestHal *hal) {
     std::vector<std::string> v = SplitString(s, '/');
     if (v.size() != 4) {
         return false;
     }
     if (!parse(v[0], &hal->format)) {
         return false;
     }
     hal->name = v[1];
     if (!parse(v[2], &hal->transportArch)) {
         return false;
     }
     if (!parse(v[3], &hal->versions)) {
         return false;
     }
     return hal->isValid();
 }

 std::ostream &operator<<(std::ostream &os, const ManifestHal &hal) {
     return os << hal.format << "/"
               << hal.name << "/"
               << hal.transportArch << "/"
               << hal.versions;
 }

 bool parse(const std::string &s, MatrixHal *req) {
     std::vector<std::string> v = SplitString(s, '/');
     if (v.size() != 4) {
         return false;
     }
     if (!parse(v[0], &req->format)) {
         return false;
     }
     req->name = v[1];
     if (!parse(v[2], &req->versionRanges)) {
         return false;
     }
     if (v[3] != kRequired || v[3] != kOptional) {
         return false;
     }
     req->optional = (v[3] == kOptional);
     return true;
 }

 std::ostream &operator<<(std::ostream &os, const MatrixHal &req) {
     return os << req.format << "/"
               << req.name << "/"
               << req.versionRanges << "/"
               << (req.optional ? kOptional : kRequired);
 }


 std::ostream &operator<<(std::ostream &os, KernelSepolicyVersion ksv){
     return os << ksv.value;
 }

 bool parse(const std::string &s, KernelSepolicyVersion *ksv){
     return ParseUint(s, &ksv->value);
 }

 std::string dump(const HalManifest &vm) {
     std::ostringstream oss;
     bool first = true;
     for (const auto &hal : vm.getHals()) {
         if (!first) {
             oss << ":";
         }
         oss << hal;
         first = false;
     }
     return oss.str();
 }

 std::string dump(const RuntimeInfo &ki) {
     std::ostringstream oss;

     oss << "kernel = "
         << ki.osName() << "/"
         << ki.nodeName() << "/"
         << ki.osRelease() << "/"
         << ki.osVersion() << "/"
         << ki.hardwareId() << ";"
         << ki.mBootAvbVersion << "/"
         << ki.mBootVbmetaAvbVersion << ";"
         << "kernelSepolicyVersion = " << ki.kernelSepolicyVersion()
         << ";\n\ncpu info:\n"
         << ki.cpuInfo()
         << "\n#CONFIG's loaded = " << ki.mKernelConfigs.size() << ";\n";
     for (const auto &pair : ki.mKernelConfigs) {
         oss << pair.first << "=" << pair.second << "\n";
     }

     return oss.str();
 }

 } // namespace vintf
 } // namespace android
	/*
	* Copyright (C) 2017 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	// Convert objects from and to strings.

	#include "parse_string.h"
	#include <android-base/parseint.h>

	namespace android {
	using base::ParseUint;

	namespace vintf {

	static const std::string kRequired("required");
	static const std::string kOptional("optional");
	static const std::string kConfigPrefix("CONFIG_");

	std::vector<std::string> SplitString(const std::string &s, char c) {
	std::vector<std::string> components;

	size_t startPos = 0;
	size_t matchPos;
	while ((matchPos = s.find(c, startPos)) != std::string::npos) {
	components.push_back(s.substr(startPos, matchPos - startPos));
	startPos = matchPos + 1;
	}

	if (startPos <= s.length()) {
	components.push_back(s.substr(startPos));
	}
	return components;
	}

	template <typename T>
	std::ostream &operator<<(std::ostream &os, const std::vector<T> objs) {
	bool first = true;
	for (const T &v : objs) {
	if (!first) {
	os << ",";
	}
	os << v;
	first = false;
	}
	return os;
	}

	template <typename T>
	bool parse(const std::string &s, std::vector<T> *objs) {
	std::vector<std::string> v = SplitString(s, ',');
	objs->resize(v.size());
	size_t idx = 0;
	for (const auto &item : v) {
	T ver;
	if (!parse(item, &ver)) {
	return false;
	}
	objs->at(idx++) = ver;
	}
	return true;
	}

	template<typename E, typename Array>
	bool parseEnum(const std::string &s, E *e, const Array &strings) {
	for (size_t i = 0; i < strings.size(); ++i) {
	if (s == strings.at(i)) {
	*e = static_cast<E>(i);
	return true;
	}
	}
	return false;
	}

	#define DEFINE_PARSE_STREAMIN_FOR_ENUM(ENUM) \
	bool parse(const std::string &s, ENUM *hf) { \
	return parseEnum(s, hf, g##ENUM##Strings); \
	} \
	std::ostream &operator<<(std::ostream &os, ENUM hf) { \
	return os << g##ENUM##Strings.at(static_cast<size_t>(hf)); \
	} \

	DEFINE_PARSE_STREAMIN_FOR_ENUM(HalFormat);
	DEFINE_PARSE_STREAMIN_FOR_ENUM(Transport);
	DEFINE_PARSE_STREAMIN_FOR_ENUM(Arch);
	DEFINE_PARSE_STREAMIN_FOR_ENUM(KernelConfigType);
	DEFINE_PARSE_STREAMIN_FOR_ENUM(Tristate);
	DEFINE_PARSE_STREAMIN_FOR_ENUM(SchemaType);

	std::ostream &operator<<(std::ostream &os, const KernelConfigTypedValue &kctv) {
	switch (kctv.mType) {
	case KernelConfigType::STRING:
	return os << kctv.mStringValue;
	case KernelConfigType::INTEGER:
	return os << to_string(kctv.mIntegerValue);
	case KernelConfigType::RANGE:
	return os << to_string(kctv.mRangeValue.first) << "-"
	<< to_string(kctv.mRangeValue.second);
	case KernelConfigType::TRISTATE:
	return os << to_string(kctv.mTristateValue);
	}
	}

	// Notice that strtoull is used even though KernelConfigIntValue is signed int64_t,
	// because strtoull can accept negative values as well.
	// Notice that according to man strtoul, strtoull can actually accept
	// -2^64 + 1 to 2^64 - 1, with the 65th bit truncated.
	// ParseInt / ParseUint are not used because they do not handle signed hex very well.
	template <typename T>
	bool parseKernelConfigIntHelper(const std::string &s, T *i) {
	char *end;
	errno = 0;
	unsigned long long int ulli = strtoull(s.c_str(), &end, 0 /* base */);
	// It is implementation defined that what value will be returned by strtoull
	// in the error case, so we are checking errno directly here.
	if (errno == 0 && s.c_str() != end && *end == '\0') {
	*i = static_cast<T>(ulli);
	return true;
	}
	return false;
	}

	bool parseKernelConfigInt(const std::string &s, int64_t *i) {
	return parseKernelConfigIntHelper(s, i);
	}

	bool parseKernelConfigInt(const std::string &s, uint64_t *i) {
	return parseKernelConfigIntHelper(s, i);
	}

	bool parseRange(const std::string &s, KernelConfigRangeValue *range) {
	auto pos = s.find('-');
	if (pos == std::string::npos) {
	return false;
	}
	return parseKernelConfigInt(s.substr(0, pos), &range->first)
	&& parseKernelConfigInt(s.substr(pos + 1), &range->second);
	}

	bool parse(const std::string &s, KernelConfigKey *key) {
	*key = s;
	return true;
	}

	bool parseKernelConfigValue(const std::string &s, KernelConfigTypedValue *kctv) {
	switch (kctv->mType) {
	case KernelConfigType::STRING:
	kctv->mStringValue = s;
	return true;
	case KernelConfigType::INTEGER:
	return parseKernelConfigInt(s, &kctv->mIntegerValue);
	case KernelConfigType::RANGE:
	return parseRange(s, &kctv->mRangeValue);
	case KernelConfigType::TRISTATE:
	return parse(s, &kctv->mTristateValue);
	}
	}

	bool parse(const std::string &s, Version *ver) {
	std::vector<std::string> v = SplitString(s, '.');
	if (v.size() != 2) {
	return false;
	}
	size_t major, minor;
	if (!ParseUint(v[0], &major)) {
	return false;
	}
	if (!ParseUint(v[1], &minor)) {
	return false;
	}
	*ver = Version(major, minor);
	return true;
	}

	std::ostream &operator<<(std::ostream &os, const Version &ver) {
	return os << ver.majorVer << "." << ver.minorVer;
	}

	bool parse(const std::string &s, VersionRange *vr) {
	std::vector<std::string> v = SplitString(s, '-');
	if (v.size() != 1 && v.size() != 2) {
	return false;
	}
	Version minVer;
	if (!parse(v[0], &minVer)) {
	return false;
	}
	if (v.size() == 1) {
	*vr = VersionRange(minVer.majorVer, minVer.minorVer);
	} else {
	size_t maxMinor;
	if (!ParseUint(v[1], &maxMinor)) {
	return false;
	}
	*vr = VersionRange(minVer.majorVer, minVer.minorVer, maxMinor);
	}
	return true;
	}

	std::ostream &operator<<(std::ostream &os, const VersionRange &vr) {
	if (vr.isSingleVersion()) {
	return os << vr.minVer();
	}
	return os << vr.minVer() << "-" << vr.maxMinor;
	}

	bool parse(const std::string &s, VndkVersionRange *vr) {
	std::vector<std::string> v = SplitString(s, '-');
	if (v.size() != 1 && v.size() != 2) {
	return false;
	}
	std::vector<std::string> minVector = SplitString(v[0], '.');
	if (minVector.size() != 3) {
	return false;
	}
	if (!ParseUint(minVector[0], &vr->sdk) \|\|
	!ParseUint(minVector[1], &vr->vndk) \|\|
	!ParseUint(minVector[2], &vr->patchMin)) {
	return false;
	}
	if (v.size() == 1) {
	vr->patchMax = vr->patchMin;
	return true;
	} else {
	return ParseUint(v[1], &vr->patchMax);
	}
	}

	std::ostream &operator<<(std::ostream &os, const VndkVersionRange &vr) {
	os << vr.sdk << "." << vr.vndk << "." << vr.patchMin;
	if (!vr.isSingleVersion()) {
	os << "-" << vr.patchMax;
	}
	return os;
	}

	bool parse(const std::string &s, KernelVersion *kernelVersion) {
	std::vector<std::string> v = SplitString(s, '.');
	if (v.size() != 3) {
	return false;
	}
	size_t version, major, minor;
	if (!ParseUint(v[0], &version)) {
	return false;
	}
	if (!ParseUint(v[1], &major)) {
	return false;
	}
	if (!ParseUint(v[2], &minor)) {
	return false;
	}
	*kernelVersion = KernelVersion(version, major, minor);
	return true;
	}

	std::ostream &operator<<(std::ostream &os, const TransportArch &ta) {
	return os << to_string(ta.transport) << to_string(ta.arch);
	}

	bool parse(const std::string &s, TransportArch *ta) {
	bool transportSet = false;
	bool archSet = false;
	for (size_t i = 0; i < gTransportStrings.size(); ++i) {
	if (s.find(gTransportStrings.at(i)) != std::string::npos) {
	ta->transport = static_cast<Transport>(i);
	transportSet = true;
	break;
	}
	}
	if (!transportSet) {
	return false;
	}
	for (size_t i = 0; i < gArchStrings.size(); ++i) {
	if (s.find(gArchStrings.at(i)) != std::string::npos) {
	ta->arch = static_cast<Arch>(i);
	archSet = true;
	break;
	}
	}
	if (!archSet) {
	return false;
	}
	return ta->isValid();
	}

	std::ostream &operator<<(std::ostream &os, const KernelVersion &ver) {
	return os << ver.version << "." << ver.majorRev << "." << ver.minorRev;
	}

	bool parse(const std::string &s, ManifestHal *hal) {
	std::vector<std::string> v = SplitString(s, '/');
	if (v.size() != 4) {
	return false;
	}
	if (!parse(v[0], &hal->format)) {
	return false;
	}
	hal->name = v[1];
	if (!parse(v[2], &hal->transportArch)) {
	return false;
	}
	if (!parse(v[3], &hal->versions)) {
	return false;
	}
	return hal->isValid();
	}

	std::ostream &operator<<(std::ostream &os, const ManifestHal &hal) {
	return os << hal.format << "/"
	<< hal.name << "/"
	<< hal.transportArch << "/"
	<< hal.versions;
	}

	bool parse(const std::string &s, MatrixHal *req) {
	std::vector<std::string> v = SplitString(s, '/');
	if (v.size() != 4) {
	return false;
	}
	if (!parse(v[0], &req->format)) {
	return false;
	}
	req->name = v[1];
	if (!parse(v[2], &req->versionRanges)) {
	return false;
	}
	if (v[3] != kRequired \|\| v[3] != kOptional) {
	return false;
	}
	req->optional = (v[3] == kOptional);
	return true;
	}

	std::ostream &operator<<(std::ostream &os, const MatrixHal &req) {
	return os << req.format << "/"
	<< req.name << "/"
	<< req.versionRanges << "/"
	<< (req.optional ? kOptional : kRequired);
	}


	std::ostream &operator<<(std::ostream &os, KernelSepolicyVersion ksv){
	return os << ksv.value;
	}

	bool parse(const std::string &s, KernelSepolicyVersion *ksv){
	return ParseUint(s, &ksv->value);
	}

	std::string dump(const HalManifest &vm) {
	std::ostringstream oss;
	bool first = true;
	for (const auto &hal : vm.getHals()) {
	if (!first) {
	oss << ":";
	}
	oss << hal;
	first = false;
	}
	return oss.str();
	}

	std::string dump(const RuntimeInfo &ki) {
	std::ostringstream oss;

	oss << "kernel = "
	<< ki.osName() << "/"
	<< ki.nodeName() << "/"
	<< ki.osRelease() << "/"
	<< ki.osVersion() << "/"
	<< ki.hardwareId() << ";"
	<< ki.mBootAvbVersion << "/"
	<< ki.mBootVbmetaAvbVersion << ";"
	<< "kernelSepolicyVersion = " << ki.kernelSepolicyVersion()
	<< ";\n\ncpu info:\n"
	<< ki.cpuInfo()
	<< "\n#CONFIG's loaded = " << ki.mKernelConfigs.size() << ";\n";
	for (const auto &pair : ki.mKernelConfigs) {
	oss << pair.first << "=" << pair.second << "\n";
	}

	return oss.str();
	}

	} // namespace vintf
	} // namespace android