| /* ********************************************************** |
| * Copyright (c) 2015-2017 Google, Inc. All rights reserved. |
| * **********************************************************/ |
| |
| /* |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * * Neither the name of Google, Inc. nor the names of its contributors may be |
| * used to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE, INC. OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| */ |
| |
| /** |
| *************************************************************************** |
| *************************************************************************** |
| \page page_droption DynamoRIO Option Parser |
| |
| The \p droption DynamoRIO Extension provides easy-to-use option |
| declaration and parsing for both clients and standalone programs. |
| |
| - \ref sec_droption_setup |
| - \ref sec_droption_usage |
| - \ref sec_droption_special |
| - \ref sec_droption_html |
| |
| \section sec_droption_setup Setup |
| |
| To use \p droption with your client simply include this line in your client's |
| \p CMakeLists.txt file: |
| |
| \code use_DynamoRIO_extension(clientname droption) \endcode |
| |
| That will automatically set up the include path. Then include the header |
| file: |
| |
| \code |
| #include "droption.h" |
| \endcode |
| |
| To use \p droption with a non-client, for example with a tool frontend or |
| other standalone application, simply include the droption.h header file. |
| |
| |
| \section sec_droption_usage Usage |
| |
| Simply declare a global instance of \p droption_t of the desired option |
| value type for each option you wish to support. Typical value types are \p |
| bool, integers, or \p std::string. For example: |
| |
| \code |
| static droption_t<unsigned int> op_x |
| (DROPTION_SCOPE_CLIENT, "x", 0, 0, 64, "Some param", |
| "Longer desc of some param."); |
| |
| static droption_t<std::string> op_y |
| (DROPTION_SCOPE_CLIENT, "y", "", "Another param", |
| "Longer desc of another param."); |
| |
| static droption_t<int> op_z |
| (DROPTION_SCOPE_CLIENT, "foo", 42, "Yet another param", |
| "Longer desc of yet another param."); |
| \endcode |
| |
| Then, ask for the \p droption_t instances to be filled in from the |
| passed-in arguments from the user. In a client using \p dr_client_main(), |
| or from a standalone application, invoke parse_argv(): |
| |
| \code |
| std::string parse_err; |
| if (!droption_parser_t::parse_argv(DROPTION_SCOPE_CLIENT, argc, argv, &parse_err)) { |
| dr_fprintf(STDERR, "Usage error: %s", parse_err.c_str()); |
| dr_abort(); |
| } |
| \endcode |
| |
| A standalone application should pass \p DROPTION_SCOPE_FRONTEND rather than |
| \p DROPTION_SCOPE_CLIENT. |
| |
| In a client using the legacy \p dr_init(), use the \p dr_parse_options() |
| function: |
| |
| \code |
| std::string parse_err; |
| if (!dr_parse_options(id, &parse_err)) { |
| dr_fprintf(STDERR, "Usage error: %s", parse_err.c_str()); |
| dr_abort(); |
| } |
| \endcode |
| |
| A boolean option \p foo can be negated on the command line using any of the |
| following prefixes: |
| |
| - -nofoo |
| - -no_foo |
| - --nofoo |
| - --no_foo |
| |
| Option values are retrieved with \p get_value: |
| |
| \code |
| if (op_x.get_value() > 4) { |
| } |
| \endcode |
| |
| The value set on the command line can be overridden with the \p set_value |
| function. |
| |
| \section sec_droption_special Special Types |
| |
| \p droption provides some custom value types for options: |
| |
| - bytesize_t: this class provides an integer type that accepts suffixes |
| like 'K', 'M', and 'G' when specifying sizes in units of bytes. |
| |
| - twostring_t: built-in support for a pair of strings as values. |
| |
| |
| \section sec_droption_html Automated HTML |
| |
| To produced automated documentation with the long-format descriptions, we |
| recommend building a small program that looks something like this: |
| |
| \code |
| #include <iostream> |
| #include "droption.h" |
| #include "options.h" |
| |
| int |
| main(int argc, const char *argv[]) |
| { |
| std::cout << droption_parser_t::usage_long(DROPTION_SCOPE_ALL, |
| "- <b>", "</b>\n", |
| " <br><i>", "</i>\n", |
| " <br>", "\n") |
| << std::endl; |
| return 0; |
| } |
| \endcode |
| |
| This program can be built and run at documentation generation time to |
| produce HTML that can then be embedded into Doxygen or other |
| documentation. |
| |
| */ |