1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #ifndef V8_FLAGS_H_ 29 #define V8_FLAGS_H_ 30 31 #include "atomicops.h" 32 33 namespace v8 { 34 namespace internal { 35 36 // Declare all of our flags. 37 #define FLAG_MODE_DECLARE 38 #include "flag-definitions.h" 39 40 // The global list of all flags. 41 class FlagList { 42 public: 43 // The list of all flags with a value different from the default 44 // and their values. The format of the list is like the format of the 45 // argv array passed to the main function, e.g. 46 // ("--prof", "--log-file", "v8.prof", "--nolazy"). 47 // 48 // The caller is responsible for disposing the list, as well 49 // as every element of it. 50 static List<const char*>* argv(); 51 52 // Set the flag values by parsing the command line. If remove_flags is 53 // set, the flags and associated values are removed from (argc, 54 // argv). Returns 0 if no error occurred. Otherwise, returns the argv 55 // index > 0 for the argument where an error occurred. In that case, 56 // (argc, argv) will remain unchanged independent of the remove_flags 57 // value, and no assumptions about flag settings should be made. 58 // 59 // The following syntax for flags is accepted (both '-' and '--' are ok): 60 // 61 // --flag (bool flags only) 62 // --noflag (bool flags only) 63 // --flag=value (non-bool flags only, no spaces around '=') 64 // --flag value (non-bool flags only) 65 // -- (equivalent to --js_arguments, captures all remaining args) 66 static int SetFlagsFromCommandLine(int* argc, char** argv, bool remove_flags); 67 68 // Set the flag values by parsing the string str. Splits string into argc 69 // substrings argv[], each of which consisting of non-white-space chars, 70 // and then calls SetFlagsFromCommandLine() and returns its result. 71 static int SetFlagsFromString(const char* str, int len); 72 73 // Reset all flags to their default value. 74 static void ResetAllFlags(); 75 76 // Print help to stdout with flags, types, and default values. 77 static void PrintHelp(); 78 79 // Set flags as consequence of being implied by another flag. 80 static void EnforceFlagImplications(); 81 }; 82 83 } } // namespace v8::internal 84 85 #endif // V8_FLAGS_H_ 86
