Initial commit.

.emacs.d/elpa/irony-20160203.1207/server/src/Command.cpp

@@ -0,0 +1,288 @@
+/**
+ * \file
+ * \author Guillaume Papin <guillaume.papin@epitech.eu>
+ * 
+ * \brief Command parser definitions.
+ *
+ * This file is distributed under the GNU General Public License. See
+ * COPYING for details.
+ */
+
+#include "Command.h"
+
+#include "support/CommandLineParser.h"
+
+#include <algorithm>
+#include <cstdlib>
+#include <functional>
+#include <iostream>
+
+namespace {
+
+struct StringConverter {
+  StringConverter(std::string *dest) : dest_(dest) {
+  }
+
+  bool operator()(const std::string &str) {
+    *dest_ = str;
+    return true;
+  }
+
+private:
+  std::string *dest_;
+};
+
+struct UnsignedIntConverter {
+  UnsignedIntConverter(unsigned *dest) : dest_(dest) {
+  }
+
+  bool operator()(const std::string &str) {
+    char *end;
+    long num = std::strtol(str.c_str(), &end, 10);
+
+    if (end != (str.c_str() + str.size()))
+      return false;
+
+    if (errno == ERANGE)
+      return false;
+
+    if (num < 0)
+      return false;
+
+    unsigned long unum = static_cast<unsigned long>(num);
+    if (unum > std::numeric_limits<unsigned>::max())
+      return false;
+
+    *dest_ = unum;
+    return true;
+  }
+
+private:
+  unsigned *dest_;
+};
+
+/// Convert "on" and "off" to a boolean
+struct OptionConverter {
+  OptionConverter(bool *dest) : dest_(dest) {
+  }
+
+  bool operator()(const std::string &str) {
+    if (str == "on") {
+      *dest_ = true;
+    } else if (str == "off") {
+      *dest_ = false;
+    } else {
+      return false;
+    }
+    return true;
+  }
+
+private:
+  bool *dest_;
+};
+
+} // unnamed namespace
+
+std::ostream &operator<<(std::ostream &os, const Command::Action &action) {
+  os << "Command::";
+
+  switch (action) {
+#define X(sym, str, help)                                                      \
+  case Command::sym:                                                           \
+    os << #sym;                                                                \
+    break;
+#include "Commands.def"
+  }
+  return os;
+}
+
+std::ostream &operator<<(std::ostream &os, const Command &command) {
+  os << "Command{action=" << command.action << ", "
+     << "file='" << command.file << "', "
+     << "dir='" << command.dir << "', "
+     << "line=" << command.line << ", "
+     << "column=" << command.column << ", "
+     << "flags=[";
+  bool first = true;
+  for (const std::string &flag : command.flags) {
+    if (!first)
+      os << ", ";
+    os << "'" << flag << "'";
+    first = false;
+  }
+  os << "], "
+     << "unsavedFiles.count=" << command.unsavedFiles.size() << ", "
+     << "opt=" << (command.opt ? "on" : "off");
+
+  return os << "}";
+}
+
+static Command::Action actionFromString(const std::string &actionStr) {
+#define X(sym, str, help)                                                      \
+  if (actionStr == str)                                                        \
+    return Command::sym;
+
+#include "Commands.def"
+
+  return Command::Unknown;
+}
+
+CommandParser::CommandParser() : tempFile_("irony-server") {
+}
+
+Command *CommandParser::parse(const std::vector<std::string> &argv) {
+  command_.clear();
+
+  if (argv.begin() == argv.end()) {
+    std::clog << "error: no command specified.\n"
+                 "See 'irony-server help' to list available commands\n";
+    return 0;
+  }
+
+  const std::string &actionStr = argv[0];
+
+  command_.action = actionFromString(actionStr);
+
+  bool handleUnsaved = false;
+  bool readCompileOptions = false;
+  std::vector<std::function<bool(const std::string &)>> positionalArgs;
+
+  switch (command_.action) {
+  case Command::SetDebug:
+    positionalArgs.push_back(OptionConverter(&command_.opt));
+    break;
+
+  case Command::Parse:
+    positionalArgs.push_back(StringConverter(&command_.file));
+    handleUnsaved = true;
+    readCompileOptions = true;
+    break;
+
+  case Command::Complete:
+    positionalArgs.push_back(StringConverter(&command_.file));
+    positionalArgs.push_back(UnsignedIntConverter(&command_.line));
+    positionalArgs.push_back(UnsignedIntConverter(&command_.column));
+    handleUnsaved = true;
+    readCompileOptions = true;
+    break;
+
+  case Command::GetType:
+    positionalArgs.push_back(UnsignedIntConverter(&command_.line));
+    positionalArgs.push_back(UnsignedIntConverter(&command_.column));
+    break;
+
+  case Command::Diagnostics:
+  case Command::Help:
+  case Command::Exit:
+    // no-arguments commands
+    break;
+
+  case Command::GetCompileOptions:
+    positionalArgs.push_back(StringConverter(&command_.dir));
+    positionalArgs.push_back(StringConverter(&command_.file));
+    break;
+
+  case Command::Unknown:
+    std::clog << "error: invalid command specified: " << actionStr << "\n";
+    return 0;
+  }
+
+  auto argIt = argv.begin() + 1;
+  int argCount = std::distance(argIt, argv.end());
+
+  // parse optional arguments come first
+  while (argIt != argv.end()) {
+    // '-' is allowed as a "default" file, this isn't an option but a positional
+    // argument
+    if ((*argIt)[0] != '-' || *argIt == "-")
+      break;
+
+    const std::string &opt = *argIt;
+
+    ++argIt;
+    argCount--;
+
+    if (handleUnsaved) {
+      // TODO: handle multiple unsaved files
+      if (opt == "--num-unsaved=1") {
+        command_.unsavedFiles.resize(1);
+      }
+    } else {
+      std::clog << "error: invalid option for '" << actionStr << "': '" << opt
+                << "' unknown\n";
+      return 0;
+    }
+  }
+
+  if (argCount != static_cast<int>(positionalArgs.size())) {
+    std::clog << "error: invalid number of arguments for '" << actionStr
+              << "' (requires " << positionalArgs.size() << " got " << argCount
+              << ")\n";
+    return 0;
+  }
+
+  for (auto fn : positionalArgs) {
+    if (!fn(*argIt)) {
+      std::clog << "error: parsing command '" << actionStr
+                << "': invalid argument '" << *argIt << "'\n";
+      return 0;
+    }
+    ++argIt;
+  }
+
+  // '-' is used as a special file to inform that the buffer hasn't been saved
+  // on disk and only the buffer content is available. libclang needs a file, so
+  // this is treated as a special value for irony-server to create a temporary
+  // file for this. note taht libclang will gladly accept '-' as a filename but
+  // we don't want to let this happen since irony already reads stdin.
+  if (command_.file == "-") {
+    command_.file = tempFile_.getPath();
+  }
+
+  // When a file is provided, the next line contains the compilation options to
+  // pass to libclang.
+  if (readCompileOptions) {
+    std::string compileOptions;
+    std::getline(std::cin, compileOptions);
+
+    command_.flags = unescapeCommandLine(compileOptions);
+  }
+
+  // read unsaved files
+  // filename
+  // filesize
+  // <file content...>
+  for (auto &p : command_.unsavedFiles) {
+    std::getline(std::cin, p.first);
+
+    unsigned length;
+    std::string filesizeStr;
+    std::getline(std::cin, filesizeStr);
+
+    UnsignedIntConverter uintConverter(&length);
+
+    if (!uintConverter(filesizeStr)) {
+      std::clog << "error: invalid file size '" << filesizeStr << "'\n";
+      return 0;
+    }
+
+    p.second.resize(length);
+    std::cin.read(p.second.data(), p.second.size());
+
+    CXUnsavedFile cxUnsavedFile;
+
+    cxUnsavedFile.Filename = p.first.c_str();
+    cxUnsavedFile.Contents = p.second.data();
+    cxUnsavedFile.Length = p.second.size();
+    command_.cxUnsavedFiles.push_back(cxUnsavedFile);
+
+    char nl;
+    std::cin.read(&nl, 1);
+    if (nl != '\n') {
+      std::clog << "error: missing newline for unsaved file content\n";
+      return 0;
+    }
+  }
+
+  return &command_;
+}