init: parsing

src/parsing.c

@@ -0,0 +1,59 @@
+#include "parsing.h"
+#include "print.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+
+static struct param parameters[] = {
+    {NULL, "?", OPTION, false},
+    {NULL, "v", OPTION, false},
+    {NULL, "f", OPTION, false},
+    {NULL, "n", OPTION, false},
+    {NULL, "w", ARGUMENT, NULL},
+    {NULL, "W",ARGUMENT, NULL},
+    {"ttl", NULL, ARGUMENT, "116"},
+    {NULL, NULL, NULL, NULL},
+};
+
+static struct param *get_parameter(struct param parameters[], const char *str)
+{
+    size_t count = str[0] == '-' + str[1] == '-';
+    for (size_t i = 0; parameters[i].name || parameters[i].alias; i++)
+    {
+        if (count == 2 && !strcmp(parameters[i].name, str + count))
+            return parameters + i;
+        else if (count == 1 && !strcmp(parameters[i].alias, str + count))
+            return parameters + i;
+    }
+    return NULL;
+}
+
+int parsing(const char * const *av)
+{
+    char *host;
+    for (size_t i = 0; av[i]; i++)
+    {
+        struct param *parameter = get_parameter(parameters, av[i]);
+        if (parameter)
+        {
+            if (parameter->type == OPTION)
+                parameter->value = (void*)true;
+            else
+            {
+                if (av[i] == NULL)
+                {
+                    print_err("%s: requirement argument", av[i]);
+                    return NULL;
+                }
+                parameter->value = (char*) av[++i];
+            }
+        }
+        else
+        {
+            host = (char*) av[i];
+        }
+    }
+    return 0;
+}

src/parsing.h

@@ -0,0 +1,13 @@
+#pragma once
+
+typedef enum {
+    OPTION,
+    ARGUMENT,
+} e_type;
+
+struct param  {
+    const char *name;
+    const char *alias;
+    e_type type;
+    void *value;
+};