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+/******************************************************************************
+ * Copyright (c) 2011-2018, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are not permitted.
+ *
+ * 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 NVIDIA CORPORATION 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.
+ *
+ ******************************************************************************/
+
+#pragma once
+
+/**
+ * \file
+ * Utility for parsing command line arguments
+ */
+
+#include <iostream>
+#include <limits>
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include <cuda_runtime.h>
+
+namespace cutlass {
+
+/******************************************************************************
+ * command_line
+ ******************************************************************************/
+
+/**
+ * Utility for parsing command line arguments
+ */
+struct CommandLine {
+ std::vector<std::string> keys;
+ std::vector<std::string> values;
+ std::vector<std::string> args;
+
+ /**
+ * Constructor
+ */
+ CommandLine(int argc, const char** argv) : keys(10), values(10) {
+ using namespace std;
+
+ for (int i = 1; i < argc; i++) {
+ string arg = argv[i];
+
+ if ((arg[0] != '-') || (arg[1] != '-')) {
+ args.push_back(arg);
+ continue;
+ }
+
+ string::size_type pos;
+ string key, val;
+ if ((pos = arg.find('=')) == string::npos) {
+ key = string(arg, 2, arg.length() - 2);
+ val = "";
+ } else {
+ key = string(arg, 2, pos - 2);
+ val = string(arg, pos + 1, arg.length() - 1);
+ }
+
+ keys.push_back(key);
+ values.push_back(val);
+ }
+ }
+
+ /**
+ * Checks whether a flag "--<flag>" is present in the commandline
+ */
+ bool check_cmd_line_flag(const char* arg_name) const {
+ using namespace std;
+
+ for (int i = 0; i < int(keys.size()); ++i) {
+ if (keys[i] == string(arg_name)) return true;
+ }
+ return false;
+ }
+
+ /**
+ * Returns number of naked (non-flag and non-key-value) commandline parameters
+ */
+ template <typename value_t>
+ int num_naked_args() const {
+ return args.size();
+ }
+
+ /**
+ * Returns the commandline parameter for a given index (not including flags)
+ */
+ template <typename value_t>
+ void get_cmd_line_argument(int index, value_t& val) const {
+ using namespace std;
+ if (index < args.size()) {
+ istringstream str_stream(args[index]);
+ str_stream >> val;
+ }
+ }
+
+ /**
+ * Returns the commandline parameter for a given index (not including flags)
+ */
+ void get_cmd_line_argument(const char* arg_name, bool& val, bool _default = true) const {
+ val = _default;
+ if (check_cmd_line_flag(arg_name)) {
+ std::string value;
+ get_cmd_line_argument(arg_name, value);
+
+ val = !(value == "0" || value == "false");
+ }
+ }
+
+ /**
+ * Returns the value specified for a given commandline parameter --<flag>=<value>
+ */
+ template <typename value_t>
+ void get_cmd_line_argument(const char* arg_name,
+ value_t& val,
+ value_t const& _default = value_t()) const {
+ using namespace std;
+
+ val = _default;
+
+ for (int i = 0; i < int(keys.size()); ++i) {
+ if (keys[i] == string(arg_name)) {
+ istringstream str_stream(values[i]);
+ str_stream >> val;
+ }
+ }
+ }
+
+ /**
+ * Returns the values specified for a given commandline parameter --<flag>=<value>,<value>*
+ */
+ template <typename value_t>
+ void get_cmd_line_arguments(const char* arg_name,
+ std::vector<value_t>& vals,
+ char sep = ',') const {
+ using namespace std;
+
+ if (check_cmd_line_flag(arg_name)) {
+ // Clear any default values
+ vals.clear();
+
+ // Recover from multi-value string
+ for (int i = 0; i < keys.size(); ++i) {
+ if (keys[i] == string(arg_name)) {
+ string val_string(values[i]);
+ istringstream str_stream(val_string);
+ string::size_type old_pos = 0;
+ string::size_type new_pos = 0;
+
+ // Iterate <sep>-delimited values
+ value_t val;
+ while ((new_pos = val_string.find(sep, old_pos)) != string::npos) {
+ if (new_pos != old_pos) {
+ str_stream.width(new_pos - old_pos);
+ str_stream >> val;
+ vals.push_back(val);
+ }
+
+ // skip over delimiter
+ str_stream.ignore(1);
+ old_pos = new_pos + 1;
+ }
+
+ // Read last value
+ str_stream >> val;
+ vals.push_back(val);
+ }
+ }
+ }
+ }
+
+ /**
+ * Returns the values specified for a given commandline parameter
+ * --<flag>=<key:value>,<key:value>*
+ */
+ void get_cmd_line_argument_pairs(const char* arg_name,
+ std::vector<std::pair<std::string, std::string> >& tokens,
+ char delim = ',',
+ char sep = ':') const {
+ if (check_cmd_line_flag(arg_name)) {
+ std::string value;
+ get_cmd_line_argument(arg_name, value);
+
+ tokenize(tokens, value, delim, sep);
+ }
+ }
+
+ /**
+ * The number of pairs parsed
+ */
+ int parsed_argc() const { return (int)keys.size(); }
+
+ //-------------------------------------------------------------------------
+ // Utility functions
+ //-------------------------------------------------------------------------
+
+ /// Tokenizes a comma-delimited list of string pairs delimited by ':'
+ static void tokenize(std::vector<std::pair<std::string, std::string> >& tokens,
+ std::string const& str,
+ char delim = ',',
+ char sep = ':') {
+ // Home-built to avoid Boost dependency
+ size_t s_idx = 0;
+ size_t d_idx = std::string::npos;
+ while (s_idx < str.size()) {
+ d_idx = str.find_first_of(delim, s_idx);
+
+ size_t end_idx = (d_idx != std::string::npos ? d_idx : str.size());
+ size_t sep_idx = str.find_first_of(sep, s_idx);
+ size_t offset = 1;
+ if (sep_idx == std::string::npos || sep_idx >= end_idx) {
+ sep_idx = end_idx;
+ offset = 0;
+ }
+
+ std::pair<std::string, std::string> item(
+ str.substr(s_idx, sep_idx - s_idx),
+ str.substr(sep_idx + offset, end_idx - sep_idx - offset));
+
+ tokens.push_back(item);
+ s_idx = end_idx + 1;
+ }
+ }
+
+ /// Tokenizes a comma-delimited list of string pairs delimited by ':'
+ static void tokenize(std::vector<std::string>& tokens,
+ std::string const& str,
+ char delim = ',',
+ char sep = ':') {
+ typedef std::vector<std::pair<std::string, std::string> > TokenVector;
+ typedef TokenVector::const_iterator token_iterator;
+
+ std::vector<std::pair<std::string, std::string> > token_pairs;
+ tokenize(token_pairs, str, delim, sep);
+ for (token_iterator tok = token_pairs.begin(); tok != token_pairs.end(); ++tok) {
+ tokens.push_back(tok->first);
+ }
+ }
+};
+
+} // namespace cutlass
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