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authorTomi Valkeinen <tomi.valkeinen@ti.com>2015-10-25 21:10:14 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2015-11-26 22:45:18 +0200
commit653d7383faeb5c3c92a64001ecfa00ba44825e3a (patch)
tree4e130e54abeb4847aef3541c5dbab7ce610f4f39
parentf0092bc3f815a5577c2fd38be55a406f2d4683fc (diff)
libkmstest: add Option & OptionSet
-rw-r--r--libkmstest/opts.cpp117
-rw-r--r--libkmstest/opts.h38
2 files changed, 155 insertions, 0 deletions
diff --git a/libkmstest/opts.cpp b/libkmstest/opts.cpp
new file mode 100644
index 0000000..4ea31f8
--- /dev/null
+++ b/libkmstest/opts.cpp
@@ -0,0 +1,117 @@
+#include <algorithm>
+
+#include <unistd.h>
+#include <getopt.h>
+
+#include "opts.h"
+
+using namespace std;
+
+Option::Option(const string& str, function<void()> func)
+ : m_void_func(func)
+{
+ parse(str);
+}
+
+Option::Option(const string& str, function<void(const string)> func)
+ : m_func(func)
+{
+ parse(str);
+}
+
+void Option::parse(const string& str)
+{
+ auto iend = str.end();
+ if (*(iend - 1) == '=') {
+ iend--;
+ m_has_arg = 1;
+ } else if (*(iend - 1) == '?') {
+ iend--;
+ m_has_arg = 2;
+ } else {
+ m_has_arg = 0;
+ }
+
+ auto isplit = find(str.begin(), iend, '|');
+
+ if (isplit != str.begin())
+ m_short = str[0];
+ else
+ m_short = 0;
+
+ if (isplit != iend)
+ m_long = string(isplit + 1, iend);
+}
+
+OptionSet::OptionSet(initializer_list<Option> il)
+ : m_opts(il)
+{
+}
+
+void OptionSet::parse(int argc, char** argv)
+{
+ string shortopts = ":";
+ vector<struct option> longopts;
+
+ for (unsigned opt_idx = 0; opt_idx < m_opts.size(); ++opt_idx) {
+ const Option& o = m_opts[opt_idx];
+
+ if (o.m_short != 0) {
+ shortopts.push_back(o.m_short);
+ if (o.m_has_arg == 1)
+ shortopts.push_back(':');
+ else if (o.m_has_arg == 2)
+ shortopts.append("::");
+ }
+
+ if (!o.m_long.empty()) {
+ struct option copt;
+ copt.name = o.m_long.c_str();
+ copt.has_arg = o.m_has_arg;
+ copt.flag = 0;
+ copt.val = opt_idx + 1000;
+ longopts.push_back(copt);
+ }
+ }
+
+ longopts.push_back(option {});
+
+ while (1) {
+ int long_idx = 0;
+ int c = getopt_long(argc, argv, shortopts.c_str(),
+ longopts.data(), &long_idx);
+ if (c == -1)
+ break;
+
+ if (c == '?')
+ throw std::invalid_argument(string("Unrecognized option ") + argv[optind - 1]);
+
+ if (c == ':') {
+ const Option& o = find_opt(optopt);
+ if (optopt < 256)
+ throw std::invalid_argument(string("Missing argument to -") + o.m_short);
+ else
+ throw std::invalid_argument(string("Missing argument to --") + o.m_long);
+ }
+
+ string sarg = { optarg ?: "" };
+
+ const Option& opt = find_opt(c);
+
+ if (opt.m_func)
+ opt.m_func(sarg);
+ else
+ opt.m_void_func();
+ }
+
+ for (int i = optind; i < argc; ++i)
+ m_params.push_back(argv[i]);
+}
+
+const Option& OptionSet::find_opt(int c)
+{
+ if (c < 256)
+ return *find_if(m_opts.begin(), m_opts.end(), [c](const Option& o) { return o.m_short == c; });
+ else
+ return m_opts[c - 1000];
+}
diff --git a/libkmstest/opts.h b/libkmstest/opts.h
new file mode 100644
index 0000000..1b0fd22
--- /dev/null
+++ b/libkmstest/opts.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include <functional>
+
+class Option
+{
+ friend class OptionSet;
+public:
+ Option(const std::string& str, std::function<void()> func);
+ Option(const std::string& str, std::function<void(const std::string)> func);
+
+private:
+ void parse(const std::string& str);
+
+ char m_short;
+ std::string m_long;
+ int m_has_arg;
+ std::function<void()> m_void_func;
+ std::function<void(const std::string)> m_func;
+};
+
+class OptionSet
+{
+public:
+ OptionSet(std::initializer_list<Option> il);
+
+ void parse(int argc, char** argv);
+
+ const std::vector<std::string> params() const { return m_params; }
+
+private:
+ const Option& find_opt(int c);
+
+ const std::vector<Option> m_opts;
+ std::vector<std::string> m_params;
+};