[v0.01] Update LICENSE and source code extensions

src/common/args.cpp

@@ -0,0 +1,99 @@
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "args.hpp"
+#include "global.hpp"
+
+struct args_struct {
+  bool help_flag;
+  bool version_flag;
+};
+
+const char args_chr[] = {
+  /* [ARG_CHAR_HELP]    = */ 'h',
+  /* [ARG_CHAR_VERSION] = */ 'V',
+};
+
+const char *args_str[] = {
+  /* [ARG_CHAR_HELP]    = */ "help",
+  /* [ARG_CHAR_VERSION] = */ "version",
+};
+
+static struct args_struct args;
+
+bool show_help() {
+  return args.help_flag;
+}
+
+bool show_version() {
+  return args.version_flag;
+}
+
+int max_arg_str_length() {
+  int max_len = -1;
+  int len = sizeof(args_str) / sizeof(args_str[0]);
+  for(int i=0; i < len; i++) {
+    max_len = max(max_len, (int) strlen(args_str[i]));
+  }
+  return max_len;
+}
+
+char* build_short_options() {
+  const char *c = args_chr;
+  int len = sizeof(args_chr) / sizeof(args_chr[0]);
+  char* str = (char *) emalloc(sizeof(char) * (len*2 + 1));
+  memset(str, 0, sizeof(char) * (len*2 + 1));
+
+  sprintf(str, "%c%c",
+  c[ARG_HELP], c[ARG_VERSION]);
+
+  return str;
+}
+
+bool parse_args(int argc, char* argv[]) {
+  int opt;
+  int option_index = 0;
+  opterr = 0;
+
+  args.version_flag = false;
+  args.help_flag = false;
+
+  const struct option long_options[] = {
+    {args_str[ARG_HELP],    no_argument,       0, args_chr[ARG_HELP]    },
+    {args_str[ARG_VERSION], no_argument,       0, args_chr[ARG_VERSION] },
+    {0, 0, 0, 0}
+  };
+
+  char* short_options = build_short_options();
+  opt = getopt_long(argc, argv, short_options, long_options, &option_index);
+
+  while (!args.help_flag && !args.version_flag && opt != -1) {
+    if(opt == args_chr[ARG_HELP]) {
+      args.help_flag  = true;
+    }
+    else if(opt == args_chr[ARG_VERSION]) {
+      args.version_flag = true;
+    }
+    else {
+      printWarn("Invalid options");
+      args.help_flag  = true;
+    }
+
+    option_index = 0;
+    opt = getopt_long(argc, argv, short_options, long_options, &option_index);
+  }
+
+  if(optind < argc) {
+    printWarn("Invalid options");
+    args.help_flag  = true;
+  }
+
+  if((args.help_flag + args.version_flag) > 1) {
+    printWarn("You should specify just one option");
+    args.help_flag  = true;
+  }
+
+  return true;
+}