Mercurial > hg > orthanc-webviewer
diff Orthanc/Core/Toolbox.cpp @ 25:15acbf5e7545
refactoring
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Tue, 02 Jun 2015 11:16:30 +0200 |
parents | |
children | 7c6cf09d838b |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Orthanc/Core/Toolbox.cpp Tue Jun 02 11:16:30 2015 +0200 @@ -0,0 +1,1141 @@ +/** + * Orthanc - A Lightweight, RESTful DICOM Store + * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * In addition, as a special exception, the copyright holders of this + * program give permission to link the code of its release with the + * OpenSSL project's "OpenSSL" library (or with modified versions of it + * that use the same license as the "OpenSSL" library), and distribute + * the linked executables. You must obey the GNU General Public License + * in all respects for all of the code used other than "OpenSSL". If you + * modify file(s) with this exception, you may extend this exception to + * your version of the file(s), but you are not obligated to do so. If + * you do not wish to do so, delete this exception statement from your + * version. If you delete this exception statement from all source files + * in the program, then also delete it here. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#include "PrecompiledHeaders.h" +#include "Toolbox.h" + +#include "OrthancException.h" + +#include <string> +#include <stdint.h> +#include <string.h> +#include <boost/filesystem.hpp> +#include <boost/filesystem/fstream.hpp> +#include <boost/uuid/sha1.hpp> +#include <boost/lexical_cast.hpp> +#include <algorithm> +#include <ctype.h> + +#if BOOST_HAS_DATE_TIME == 1 +#include <boost/date_time/posix_time/posix_time.hpp> +#endif + +#if BOOST_HAS_REGEX == 1 +#include <boost/regex.hpp> +#endif + +#if HAVE_GOOGLE_LOG == 1 +#include <glog/logging.h> +#endif + +#if defined(_WIN32) +#include <windows.h> +#include <process.h> // For "_spawnvp()" +#else +#include <unistd.h> // For "execvp()" +#include <sys/wait.h> // For "waitpid()" +#endif + +#if defined(__APPLE__) && defined(__MACH__) +#include <mach-o/dyld.h> /* _NSGetExecutablePath */ +#include <limits.h> /* PATH_MAX */ +#endif + +#if defined(__linux) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) +#include <limits.h> /* PATH_MAX */ +#include <signal.h> +#include <unistd.h> +#endif + +#if BOOST_HAS_LOCALE != 1 +#error Since version 0.7.6, Orthanc entirely relies on boost::locale +#endif + +#include <boost/locale.hpp> + +#include "../Resources/ThirdParty/md5/md5.h" +#include "../Resources/ThirdParty/base64/base64.h" + + +#if defined(_MSC_VER) && (_MSC_VER < 1800) +// Patch for the missing "_strtoll" symbol when compiling with Visual Studio < 2013 +extern "C" +{ + int64_t _strtoi64(const char *nptr, char **endptr, int base); + int64_t strtoll(const char *nptr, char **endptr, int base) + { + return _strtoi64(nptr, endptr, base); + } +} +#endif + + +#if ORTHANC_PUGIXML_ENABLED == 1 +#include "ChunkedBuffer.h" +#include <pugixml.hpp> +#endif + + +namespace Orthanc +{ + static bool finish; + +#if defined(_WIN32) + static BOOL WINAPI ConsoleControlHandler(DWORD dwCtrlType) + { + // http://msdn.microsoft.com/en-us/library/ms683242(v=vs.85).aspx + finish = true; + return true; + } +#else + static void SignalHandler(int) + { + finish = true; + } +#endif + + void Toolbox::USleep(uint64_t microSeconds) + { +#if defined(_WIN32) + ::Sleep(static_cast<DWORD>(microSeconds / static_cast<uint64_t>(1000))); +#elif defined(__linux) || defined(__APPLE__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) + usleep(microSeconds); +#else +#error Support your platform here +#endif + } + + + static void ServerBarrierInternal(const bool* stopFlag) + { +#if defined(_WIN32) + SetConsoleCtrlHandler(ConsoleControlHandler, true); +#else + signal(SIGINT, SignalHandler); + signal(SIGQUIT, SignalHandler); + signal(SIGTERM, SignalHandler); +#endif + + // Active loop that awakens every 100ms + finish = false; + while (!(*stopFlag || finish)) + { + Toolbox::USleep(100 * 1000); + } + +#if defined(_WIN32) + SetConsoleCtrlHandler(ConsoleControlHandler, false); +#else + signal(SIGINT, NULL); + signal(SIGQUIT, NULL); + signal(SIGTERM, NULL); +#endif + } + + + void Toolbox::ServerBarrier(const bool& stopFlag) + { + ServerBarrierInternal(&stopFlag); + } + + void Toolbox::ServerBarrier() + { + const bool stopFlag = false; + ServerBarrierInternal(&stopFlag); + } + + + void Toolbox::ToUpperCase(std::string& s) + { + std::transform(s.begin(), s.end(), s.begin(), toupper); + } + + + void Toolbox::ToLowerCase(std::string& s) + { + std::transform(s.begin(), s.end(), s.begin(), tolower); + } + + + void Toolbox::ToUpperCase(std::string& result, + const std::string& source) + { + result = source; + ToUpperCase(result); + } + + void Toolbox::ToLowerCase(std::string& result, + const std::string& source) + { + result = source; + ToLowerCase(result); + } + + + void Toolbox::ReadFile(std::string& content, + const std::string& path) + { + boost::filesystem::ifstream f; + f.open(path, std::ifstream::in | std::ifstream::binary); + if (!f.good()) + { + throw OrthancException(ErrorCode_InexistentFile); + } + + // http://www.cplusplus.com/reference/iostream/istream/tellg/ + f.seekg(0, std::ios::end); + std::streamsize size = f.tellg(); + f.seekg(0, std::ios::beg); + + content.resize(size); + if (size != 0) + { + f.read(reinterpret_cast<char*>(&content[0]), size); + } + + f.close(); + } + + + void Toolbox::WriteFile(const std::string& content, + const std::string& path) + { + boost::filesystem::ofstream f; + f.open(path, std::ofstream::binary); + if (!f.good()) + { + throw OrthancException(ErrorCode_CannotWriteFile); + } + + if (content.size() != 0) + { + f.write(content.c_str(), content.size()); + } + + f.close(); + } + + + + void Toolbox::RemoveFile(const std::string& path) + { + if (boost::filesystem::exists(path)) + { + if (boost::filesystem::is_regular_file(path)) + boost::filesystem::remove(path); + else + throw OrthancException("The path is not a regular file: " + path); + } + } + + + + void Toolbox::SplitUriComponents(UriComponents& components, + const std::string& uri) + { + static const char URI_SEPARATOR = '/'; + + components.clear(); + + if (uri.size() == 0 || + uri[0] != URI_SEPARATOR) + { + throw OrthancException(ErrorCode_UriSyntax); + } + + // Count the number of slashes in the URI to make an assumption + // about the number of components in the URI + unsigned int estimatedSize = 0; + for (unsigned int i = 0; i < uri.size(); i++) + { + if (uri[i] == URI_SEPARATOR) + estimatedSize++; + } + + components.reserve(estimatedSize - 1); + + unsigned int start = 1; + unsigned int end = 1; + while (end < uri.size()) + { + // This is the loop invariant + assert(uri[start - 1] == '/' && (end >= start)); + + if (uri[end] == '/') + { + components.push_back(std::string(&uri[start], end - start)); + end++; + start = end; + } + else + { + end++; + } + } + + if (start < uri.size()) + { + components.push_back(std::string(&uri[start], end - start)); + } + + for (size_t i = 0; i < components.size(); i++) + { + if (components[i].size() == 0) + { + // Empty component, as in: "/coucou//e" + throw OrthancException(ErrorCode_UriSyntax); + } + } + } + + + void Toolbox::TruncateUri(UriComponents& target, + const UriComponents& source, + size_t fromLevel) + { + target.clear(); + + if (source.size() > fromLevel) + { + target.resize(source.size() - fromLevel); + + size_t j = 0; + for (size_t i = fromLevel; i < source.size(); i++, j++) + { + target[j] = source[i]; + } + + assert(j == target.size()); + } + } + + + + bool Toolbox::IsChildUri(const UriComponents& baseUri, + const UriComponents& testedUri) + { + if (testedUri.size() < baseUri.size()) + { + return false; + } + + for (size_t i = 0; i < baseUri.size(); i++) + { + if (baseUri[i] != testedUri[i]) + return false; + } + + return true; + } + + + std::string Toolbox::AutodetectMimeType(const std::string& path) + { + std::string contentType; + size_t lastDot = path.rfind('.'); + size_t lastSlash = path.rfind('/'); + + if (lastDot == std::string::npos || + (lastSlash != std::string::npos && lastDot < lastSlash)) + { + // No trailing dot, unable to detect the content type + } + else + { + const char* extension = &path[lastDot + 1]; + + // http://en.wikipedia.org/wiki/Mime_types + // Text types + if (!strcmp(extension, "txt")) + contentType = "text/plain"; + else if (!strcmp(extension, "html")) + contentType = "text/html"; + else if (!strcmp(extension, "xml")) + contentType = "text/xml"; + else if (!strcmp(extension, "css")) + contentType = "text/css"; + + // Application types + else if (!strcmp(extension, "js")) + contentType = "application/javascript"; + else if (!strcmp(extension, "json")) + contentType = "application/json"; + else if (!strcmp(extension, "pdf")) + contentType = "application/pdf"; + + // Images types + else if (!strcmp(extension, "jpg") || !strcmp(extension, "jpeg")) + contentType = "image/jpeg"; + else if (!strcmp(extension, "gif")) + contentType = "image/gif"; + else if (!strcmp(extension, "png")) + contentType = "image/png"; + } + + return contentType; + } + + + std::string Toolbox::FlattenUri(const UriComponents& components, + size_t fromLevel) + { + if (components.size() <= fromLevel) + { + return "/"; + } + else + { + std::string r; + + for (size_t i = fromLevel; i < components.size(); i++) + { + r += "/" + components[i]; + } + + return r; + } + } + + + + uint64_t Toolbox::GetFileSize(const std::string& path) + { + try + { + return static_cast<uint64_t>(boost::filesystem::file_size(path)); + } + catch (boost::filesystem::filesystem_error) + { + throw OrthancException(ErrorCode_InexistentFile); + } + } + + + static char GetHexadecimalCharacter(uint8_t value) + { + assert(value < 16); + + if (value < 10) + return value + '0'; + else + return (value - 10) + 'a'; + } + + + void Toolbox::ComputeMD5(std::string& result, + const std::string& data) + { + if (data.size() > 0) + { + ComputeMD5(result, &data[0], data.size()); + } + else + { + ComputeMD5(result, NULL, 0); + } + } + + + void Toolbox::ComputeMD5(std::string& result, + const void* data, + size_t length) + { + md5_state_s state; + md5_init(&state); + + if (length > 0) + { + md5_append(&state, + reinterpret_cast<const md5_byte_t*>(data), + static_cast<int>(length)); + } + + md5_byte_t actualHash[16]; + md5_finish(&state, actualHash); + + result.resize(32); + for (unsigned int i = 0; i < 16; i++) + { + result[2 * i] = GetHexadecimalCharacter(actualHash[i] / 16); + result[2 * i + 1] = GetHexadecimalCharacter(actualHash[i] % 16); + } + } + + + void Toolbox::EncodeBase64(std::string& result, + const std::string& data) + { + result = base64_encode(data); + } + + void Toolbox::DecodeBase64(std::string& result, + const std::string& data) + { + result = base64_decode(data); + } + + +#if defined(_WIN32) + static std::string GetPathToExecutableInternal() + { + // Yes, this is ugly, but there is no simple way to get the + // required buffer size, so we use a big constant + std::vector<char> buffer(32768); + /*int bytes =*/ GetModuleFileNameA(NULL, &buffer[0], static_cast<DWORD>(buffer.size() - 1)); + return std::string(&buffer[0]); + } + +#elif defined(__linux) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) + static std::string GetPathToExecutableInternal() + { + std::vector<char> buffer(PATH_MAX + 1); + ssize_t bytes = readlink("/proc/self/exe", &buffer[0], buffer.size() - 1); + if (bytes == 0) + { + throw OrthancException("Unable to get the path to the executable"); + } + + return std::string(&buffer[0]); + } + +#elif defined(__APPLE__) && defined(__MACH__) + static std::string GetPathToExecutableInternal() + { + char pathbuf[PATH_MAX + 1]; + unsigned int bufsize = static_cast<int>(sizeof(pathbuf)); + + _NSGetExecutablePath( pathbuf, &bufsize); + + return std::string(pathbuf); + } + +#else +#error Support your platform here +#endif + + + std::string Toolbox::GetPathToExecutable() + { + boost::filesystem::path p(GetPathToExecutableInternal()); + return boost::filesystem::absolute(p).string(); + } + + + std::string Toolbox::GetDirectoryOfExecutable() + { + boost::filesystem::path p(GetPathToExecutableInternal()); + return boost::filesystem::absolute(p.parent_path()).string(); + } + + + std::string Toolbox::ConvertToUtf8(const std::string& source, + const Encoding sourceEncoding) + { + const char* encoding; + + + // http://bradleyross.users.sourceforge.net/docs/dicom/doc/src-html/org/dcm4che2/data/SpecificCharacterSet.html + switch (sourceEncoding) + { + case Encoding_Utf8: + // Already in UTF-8: No conversion is required + return source; + + case Encoding_Ascii: + return ConvertToAscii(source); + + case Encoding_Latin1: + encoding = "ISO-8859-1"; + break; + + case Encoding_Latin2: + encoding = "ISO-8859-2"; + break; + + case Encoding_Latin3: + encoding = "ISO-8859-3"; + break; + + case Encoding_Latin4: + encoding = "ISO-8859-4"; + break; + + case Encoding_Latin5: + encoding = "ISO-8859-9"; + break; + + case Encoding_Cyrillic: + encoding = "ISO-8859-5"; + break; + + case Encoding_Windows1251: + encoding = "WINDOWS-1251"; + break; + + case Encoding_Arabic: + encoding = "ISO-8859-6"; + break; + + case Encoding_Greek: + encoding = "ISO-8859-7"; + break; + + case Encoding_Hebrew: + encoding = "ISO-8859-8"; + break; + + case Encoding_Japanese: + encoding = "SHIFT-JIS"; + break; + + case Encoding_Chinese: + encoding = "GB18030"; + break; + + case Encoding_Thai: + encoding = "TIS620.2533-0"; + break; + + default: + throw OrthancException(ErrorCode_NotImplemented); + } + + try + { + return boost::locale::conv::to_utf<char>(source, encoding); + } + catch (std::runtime_error&) + { + // Bad input string or bad encoding + return ConvertToAscii(source); + } + } + + + std::string Toolbox::ConvertToAscii(const std::string& source) + { + std::string result; + + result.reserve(source.size() + 1); + for (size_t i = 0; i < source.size(); i++) + { + if (source[i] <= 127 && source[i] >= 0 && !iscntrl(source[i])) + { + result.push_back(source[i]); + } + } + + return result; + } + + void Toolbox::ComputeSHA1(std::string& result, + const std::string& data) + { + boost::uuids::detail::sha1 sha1; + + if (data.size() > 0) + { + sha1.process_bytes(&data[0], data.size()); + } + + unsigned int digest[5]; + + // Sanity check for the memory layout: A SHA-1 digest is 160 bits wide + assert(sizeof(unsigned int) == 4 && sizeof(digest) == (160 / 8)); + + sha1.get_digest(digest); + + result.resize(8 * 5 + 4); + sprintf(&result[0], "%08x-%08x-%08x-%08x-%08x", + digest[0], + digest[1], + digest[2], + digest[3], + digest[4]); + } + + bool Toolbox::IsSHA1(const std::string& str) + { + if (str.size() != 44) + { + return false; + } + + for (unsigned int i = 0; i < 44; i++) + { + if (i == 8 || + i == 17 || + i == 26 || + i == 35) + { + if (str[i] != '-') + return false; + } + else + { + if (!isalnum(str[i])) + return false; + } + } + + return true; + } + + +#if BOOST_HAS_DATE_TIME == 1 + std::string Toolbox::GetNowIsoString() + { + boost::posix_time::ptime now = boost::posix_time::second_clock::local_time(); + return boost::posix_time::to_iso_string(now); + } +#endif + + + std::string Toolbox::StripSpaces(const std::string& source) + { + size_t first = 0; + + while (first < source.length() && + isspace(source[first])) + { + first++; + } + + if (first == source.length()) + { + // String containing only spaces + return ""; + } + + size_t last = source.length(); + while (last > first && + isspace(source[last - 1])) + { + last--; + } + + assert(first <= last); + return source.substr(first, last - first); + } + + + static char Hex2Dec(char c) + { + return ((c >= '0' && c <= '9') ? c - '0' : + ((c >= 'a' && c <= 'f') ? c - 'a' + 10 : c - 'A' + 10)); + } + + void Toolbox::UrlDecode(std::string& s) + { + // http://en.wikipedia.org/wiki/Percent-encoding + // http://www.w3schools.com/tags/ref_urlencode.asp + // http://stackoverflow.com/questions/154536/encode-decode-urls-in-c + + if (s.size() == 0) + { + return; + } + + size_t source = 0; + size_t target = 0; + + while (source < s.size()) + { + if (s[source] == '%' && + source + 2 < s.size() && + isalnum(s[source + 1]) && + isalnum(s[source + 2])) + { + s[target] = (Hex2Dec(s[source + 1]) << 4) | Hex2Dec(s[source + 2]); + source += 3; + target += 1; + } + else + { + if (s[source] == '+') + s[target] = ' '; + else + s[target] = s[source]; + + source++; + target++; + } + } + + s.resize(target); + } + + + Endianness Toolbox::DetectEndianness() + { + // http://sourceforge.net/p/predef/wiki/Endianness/ + + uint8_t buffer[4]; + + buffer[0] = 0x00; + buffer[1] = 0x01; + buffer[2] = 0x02; + buffer[3] = 0x03; + + switch (*((uint32_t *)buffer)) + { + case 0x00010203: + return Endianness_Big; + + case 0x03020100: + return Endianness_Little; + + default: + throw OrthancException(ErrorCode_NotImplemented); + } + } + + +#if BOOST_HAS_REGEX == 1 + std::string Toolbox::WildcardToRegularExpression(const std::string& source) + { + // TODO - Speed up this with a regular expression + + std::string result = source; + + // Escape all special characters + boost::replace_all(result, "\\", "\\\\"); + boost::replace_all(result, "^", "\\^"); + boost::replace_all(result, ".", "\\."); + boost::replace_all(result, "$", "\\$"); + boost::replace_all(result, "|", "\\|"); + boost::replace_all(result, "(", "\\("); + boost::replace_all(result, ")", "\\)"); + boost::replace_all(result, "[", "\\["); + boost::replace_all(result, "]", "\\]"); + boost::replace_all(result, "+", "\\+"); + boost::replace_all(result, "/", "\\/"); + boost::replace_all(result, "{", "\\{"); + boost::replace_all(result, "}", "\\}"); + + // Convert wildcards '*' and '?' to their regex equivalents + boost::replace_all(result, "?", "."); + boost::replace_all(result, "*", ".*"); + + return result; + } +#endif + + + + void Toolbox::TokenizeString(std::vector<std::string>& result, + const std::string& value, + char separator) + { + result.clear(); + + std::string currentItem; + + for (size_t i = 0; i < value.size(); i++) + { + if (value[i] == separator) + { + result.push_back(currentItem); + currentItem.clear(); + } + else + { + currentItem.push_back(value[i]); + } + } + + result.push_back(currentItem); + } + + +#if BOOST_HAS_REGEX == 1 + void Toolbox::DecodeDataUriScheme(std::string& mime, + std::string& content, + const std::string& source) + { + boost::regex pattern("data:([^;]+);base64,([a-zA-Z0-9=+/]*)", + boost::regex::icase /* case insensitive search */); + + boost::cmatch what; + if (regex_match(source.c_str(), what, pattern)) + { + mime = what[1]; + content = what[2]; + } + else + { + throw OrthancException(ErrorCode_BadFileFormat); + } + } +#endif + + + void Toolbox::MakeDirectory(const std::string& path) + { + if (boost::filesystem::exists(path)) + { + if (!boost::filesystem::is_directory(path)) + { + throw OrthancException("Cannot create the directory over an existing file: " + path); + } + } + else + { + if (!boost::filesystem::create_directories(path)) + { + throw OrthancException("Unable to create the directory: " + path); + } + } + } + + + bool Toolbox::IsExistingFile(const std::string& path) + { + return boost::filesystem::exists(path); + } + + +#if ORTHANC_PUGIXML_ENABLED == 1 + class ChunkedBufferWriter : public pugi::xml_writer + { + private: + ChunkedBuffer buffer_; + + public: + virtual void write(const void *data, size_t size) + { + if (size > 0) + { + buffer_.AddChunk(reinterpret_cast<const char*>(data), size); + } + } + + void Flatten(std::string& s) + { + buffer_.Flatten(s); + } + }; + + + static void JsonToXmlInternal(pugi::xml_node& target, + const Json::Value& source, + const std::string& arrayElement) + { + // http://jsoncpp.sourceforge.net/value_8h_source.html#l00030 + + switch (source.type()) + { + case Json::nullValue: + { + target.append_child(pugi::node_pcdata).set_value("null"); + break; + } + + case Json::intValue: + { + std::string s = boost::lexical_cast<std::string>(source.asInt()); + target.append_child(pugi::node_pcdata).set_value(s.c_str()); + break; + } + + case Json::uintValue: + { + std::string s = boost::lexical_cast<std::string>(source.asUInt()); + target.append_child(pugi::node_pcdata).set_value(s.c_str()); + break; + } + + case Json::realValue: + { + std::string s = boost::lexical_cast<std::string>(source.asFloat()); + target.append_child(pugi::node_pcdata).set_value(s.c_str()); + break; + } + + case Json::stringValue: + { + target.append_child(pugi::node_pcdata).set_value(source.asString().c_str()); + break; + } + + case Json::booleanValue: + { + target.append_child(pugi::node_pcdata).set_value(source.asBool() ? "true" : "false"); + break; + } + + case Json::arrayValue: + { + for (Json::Value::ArrayIndex i = 0; i < source.size(); i++) + { + pugi::xml_node node = target.append_child(); + node.set_name(arrayElement.c_str()); + JsonToXmlInternal(node, source[i], arrayElement); + } + break; + } + + case Json::objectValue: + { + Json::Value::Members members = source.getMemberNames(); + + for (size_t i = 0; i < members.size(); i++) + { + pugi::xml_node node = target.append_child(); + node.set_name(members[i].c_str()); + JsonToXmlInternal(node, source[members[i]], arrayElement); + } + + break; + } + + default: + throw OrthancException(ErrorCode_NotImplemented); + } + } + + + void Toolbox::JsonToXml(std::string& target, + const Json::Value& source, + const std::string& rootElement, + const std::string& arrayElement) + { + pugi::xml_document doc; + + pugi::xml_node n = doc.append_child(rootElement.c_str()); + JsonToXmlInternal(n, source, arrayElement); + + pugi::xml_node decl = doc.prepend_child(pugi::node_declaration); + decl.append_attribute("version").set_value("1.0"); + decl.append_attribute("encoding").set_value("utf-8"); + + ChunkedBufferWriter writer; + doc.save(writer, " ", pugi::format_default, pugi::encoding_utf8); + writer.Flatten(target); + } + +#endif + + + void Toolbox::ExecuteSystemCommand(const std::string& command, + const std::vector<std::string>& arguments) + { + // Convert the arguments as a C array + std::vector<char*> args(arguments.size() + 2); + + args.front() = const_cast<char*>(command.c_str()); + + for (size_t i = 0; i < arguments.size(); i++) + { + args[i + 1] = const_cast<char*>(arguments[i].c_str()); + } + + args.back() = NULL; + + int status; + +#if defined(_WIN32) + // http://msdn.microsoft.com/en-us/library/275khfab.aspx + status = static_cast<int>(_spawnvp(_P_OVERLAY, command.c_str(), &args[0])); + +#else + int pid = fork(); + + if (pid == -1) + { + // Error in fork() +#if HAVE_GOOGLE_LOG == 1 + LOG(ERROR) << "Cannot fork a child process"; +#endif + + throw OrthancException(ErrorCode_SystemCommand); + } + else if (pid == 0) + { + // Execute the system command in the child process + execvp(command.c_str(), &args[0]); + + // We should never get here + _exit(1); + } + else + { + // Wait for the system command to exit + waitpid(pid, &status, 0); + } +#endif + + if (status != 0) + { +#if HAVE_GOOGLE_LOG == 1 + LOG(ERROR) << "System command failed with status code " << status; +#endif + + throw OrthancException(ErrorCode_SystemCommand); + } + } + + + bool Toolbox::IsInteger(const std::string& str) + { + std::string s = StripSpaces(str); + + if (s.size() == 0) + { + return false; + } + + size_t pos = 0; + if (s[0] == '-') + { + if (s.size() == 1) + { + return false; + } + + pos = 1; + } + + while (pos < s.size()) + { + if (!isdigit(s[pos])) + { + return false; + } + + pos++; + } + + return true; + } +} +