* Moved the rest of the helper functions from VariableMap to

parse_commands.h.


git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@912 e378c898-3ddf-0310-93e7-cc216c733640

src/rpc/parse_commands.cc

@@ -0,0 +1,176 @@
+// rTorrent - BitTorrent client
+// Copyright (C) 2006, Jari Sundell
+//
+// 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 2 of the License, or
+// (at your option) any later version.
+// 
+// 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, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+// In addition, as a special exception, the copyright holders give
+// permission to link the code of portions of this program with the
+// OpenSSL library under certain conditions as described in each
+// individual source file, and distribute linked combinations
+// including the two.
+//
+// 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.
+//
+// Contact:  Jari Sundell <jaris@ifi.uio.no>
+//
+//           Skomakerveien 33
+//           3185 Skoppum, NORWAY
+
+#include "config.h"
+
+#include <algorithm>
+#include <fstream>
+#include <string>
+#include <rak/functional.h>
+#include <rak/path.h>
+#include <torrent/exceptions.h>
+
+#include "parse.h"
+#include "parse_commands.h"
+#include "utils/variable_map.h"
+
+namespace utils {
+
+struct variable_map_is_space : std::unary_function<char, bool> {
+  bool operator () (char c) const {
+    return std::isspace(c);
+  }
+};
+
+struct variable_map_is_newline : std::unary_function<char, bool> {
+  bool operator () (char c) const {
+    return c == '\n' || c == '\0';
+  }
+};
+
+// Use a static length buffer for dest.
+const char*
+parse_command_name(const char* first, const char* last, std::string* dest) {
+  if (first == last || !std::isalpha(*first))
+    throw torrent::input_error("Invalid start of name.");
+
+  for ( ; first != last && (std::isalnum(*first) || *first == '_'); ++first)
+    dest->push_back(*first);
+
+  return first;
+}
+
+const char*
+parse_command_single(VariableMap* varMap, const char* first) {
+  return parse_command_single(varMap, first, first + std::strlen(first));
+}
+
+const char*
+parse_command_single(VariableMap* varMap, const char* first, const char* last) {
+  first = std::find_if(first, last, std::not1(variable_map_is_space()));
+
+  if (first == last || *first == '#')
+    return last;
+  
+  // Avoid using a string here?
+  std::string key;
+  first = parse_command_name(first, last, &key);
+  first = std::find_if(first, last, std::not1(variable_map_is_space()));
+  
+  if (first == last || *first != '=')
+    throw torrent::input_error("Could not find '='.");
+
+  torrent::Object args;
+  parse_whole_list(first + 1, last, &args);
+
+  varMap->call_command(key.c_str(), args);
+
+  return last;
+}
+
+const char*
+parse_command_d_single(VariableMap* varMap, core::Download* download, const char* first, const char* last) {
+  first = std::find_if(first, last, std::not1(variable_map_is_space()));
+
+  if (first == last || *first == '#')
+    return last;
+  
+  std::string key;
+  first = parse_command_name(first, last, &key);
+  first = std::find_if(first, last, std::not1(variable_map_is_space()));
+  
+  if (first == last || *first != '=')
+    throw torrent::input_error("Could not find '='.");
+
+  torrent::Object args;
+  parse_whole_list(first + 1, last, &args);
+
+  varMap->call_command_d(key.c_str(), download, args);
+
+  return last;
+}
+
+void
+parse_command_multiple(VariableMap* varMap, const char* first) {
+  try {
+    while (first != '\0') {
+      const char* last = first;
+
+      while (*last != '\n' && *last != '\0') last++;
+
+      // Should we check the return value? Probably not necessary as
+      // parse_args throws on unquoted multi-word input.
+      parse_command_single(varMap, first, last);
+
+      if (*last == '\0')
+        return;
+
+      first = last + 1;
+    }
+
+  } catch (torrent::input_error& e) {
+    throw torrent::input_error(std::string("Error parsing multi-line option: ") + e.what());
+  }
+}
+
+bool
+parse_command_file(VariableMap* varMap, const std::string& path) {
+  std::fstream file(rak::path_expand(path).c_str(), std::ios::in);
+
+  if (!file.is_open())
+    return false;
+
+  int lineNumber = 0;
+  char buffer[2048];
+
+  try {
+
+    while (file.getline(buffer, 2048).good()) {
+      lineNumber++;
+      // Would be nice to make this zero-copy.
+      parse_command_single(varMap, buffer, buffer + std::strlen(buffer));
+    }
+
+  } catch (torrent::input_error& e) {
+    snprintf(buffer, 2048, "Error in option file: %s:%i: %s", path.c_str(), lineNumber, e.what());
+
+    throw torrent::input_error(buffer);
+  }
+
+  return true;
+}
+
+}