intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 77 insertions, 0 deletions

diff --git a/library/cpp/getopt/small/posix_getopt.cpp b/library/cpp/getopt/small/posix_getopt.cpp
new file mode 100644
index 0000000000..bd06f3499f
--- /dev/null
+++ b/library/cpp/getopt/small/posix_getopt.cpp
@@ -0,0 +1,77 @@
+#include "posix_getopt.h"
+
+#include <util/generic/ptr.h>
+
+#include <ctype.h>
+
+namespace NLastGetopt {
+    char* optarg;
+    int optind;
+    int optopt;
+    int opterr;
+    int optreset;
+
+    static THolder<TOpts> Opts;
+    static THolder<TOptsParser> OptsParser;
+
+    int getopt_long_impl(int argc, char* const* argv, const char* optstring,
+                         const struct option* longopts, int* longindex, bool long_only) {
+        if (!Opts || optreset == 1) {
+            optarg = nullptr;
+            optind = 1;
+            opterr = 1;
+            optreset = 0;
+            Opts.Reset(new TOpts(TOpts::Default(optstring)));
+
+            Opts->AllowSingleDashForLong_ = long_only;
+
+            for (const struct option* o = longopts; o != nullptr && o->name != nullptr; ++o) {
+                TOpt* opt;
+                if ((unsigned)o->val < 0x80 && isalnum(o->val)) {
+                    opt = &Opts->CharOption(char(o->val));
+                    opt->AddLongName(o->name);
+                } else {
+                    Opts->AddLongOption(o->name);
+                    opt = const_cast<TOpt*>(&Opts->GetLongOption(o->name));
+                }
+                opt->HasArg_ = EHasArg(o->has_arg);
+                opt->UserValue(o->flag);
+            }
+
+            OptsParser.Reset(new TOptsParser(&*Opts, argc, (const char**)argv));
+        }
+
+        optarg = nullptr;
+
+        try {
+            if (!OptsParser->Next()) {
+                return -1;
+            } else {
+                optarg = (char*)OptsParser->CurVal();
+                optind = (int)OptsParser->Pos_;
+                if (longindex && OptsParser->CurOpt())
+                    *longindex = (int)Opts->IndexOf(OptsParser->CurOpt());
+                return OptsParser->CurOpt() ? OptsParser->CurOpt()->GetCharOr0() : 1;
+            }
+        } catch (const NLastGetopt::TException&) {
+            return '?';
+        }
+    }
+
+    int getopt_long(int argc, char* const* argv, const char* optstring,
+                    const struct option* longopts, int* longindex) {
+        return getopt_long_impl(argc, argv, optstring, longopts, longindex, false);
+    }
+
+    int getopt_long_only(int argc, char* const* argv, const char* optstring,
+                         const struct option* longopts, int* longindex) {
+        return getopt_long_impl(argc, argv, optstring, longopts, longindex, true);
+    }
+
+    // XXX: leading colon is not supported
+    // XXX: updating optind by client is not supported
+    int getopt(int argc, char* const* argv, const char* optstring) {
+        return getopt_long(argc, argv, optstring, nullptr, nullptr);
+    }
+
+}