Add ktx

ktx/utils/argparser.h

@@ -0,0 +1,61 @@
+/* -*- tab-width: 4; -*- */
+/* vi: set sw=2 ts=4 expandtab: */
+
+#ifndef ARGPARSER_H
+#define ARGPARSER_H
+
+/*
+ * Copyright 2017-2020 Mark Callow, github.com/MarkCallow.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <ios>
+#include <sstream>
+#include <string>
+#include <vector>
+
+class argvector : public std::vector<std::string> {
+  public:
+    argvector() { };
+    argvector(const std::string& argstring);
+    argvector(int argc, const char* const* argv);
+};
+
+class argparser {
+  public:
+    struct option {
+        const char* name;
+        enum has_arg_t {no_argument, required_argument, optional_argument} has_arg;
+        int* flag;
+        int val;
+
+        option(const char* name, has_arg_t has_arg, int* flag, int val) : name(name), has_arg(has_arg), flag(flag), val(val) {}
+    };
+
+    std::string optarg;
+    unsigned int optind;
+    argvector argv;
+
+    argparser(argvector& argv, unsigned int startindex = 0)
+        : optind(startindex), argv(argv) { }
+
+    argparser(int argc, const char* const* argv1)
+        : optind(1), argv(argc, argv1)  { }
+
+    int getopt(std::string* shortopts, const struct option* longopts,
+               int* longindex = nullptr);
+};
+
+//================== Helper for apps' processArgs ========================
+
+// skips the number of characters equal to the length of given text
+// does not check whether the skipped characters are the same as it
+struct skip
+{
+    const char* text;
+    skip(const char* text) : text(text) {}
+};
+
+std::istream& operator >> (std::istream& stream, const skip& x);
+
+#endif /* ARGPARSER_H */