feat: standard argument parsing

core/file.c

@@ -7,60 +7,71 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-error_t touch(char *path, char *format, ...) {
-  error_t err = {0};
+error_t
+touch (char *path, char *format, ...)
+{
+  error_t err = { 0 };
   err.null = true;
 
-  FILE *fp = fopen(path, "w");
-  if (!fp) {
-    err.null = false;
-    err.status = errno;
-    err.src = strerror(errno);
-    return err;
-  }
+  FILE *fp = fopen (path, "w");
+  if (!fp)
+    {
+      err.null = false;
+      err.status = errno;
+      err.src = strerror (errno);
+      return err;
+    }
 
-  else {
-    va_list args;
-    va_start(args, format);
-    vfprintf(fp, format, args);
-    va_end(args);
-  }
+  else
+    {
+      va_list args;
+      va_start (args, format);
+      vfprintf (fp, format, args);
+      va_end (args);
+    }
 
-  fclose(fp);
+  fclose (fp);
   return err;
 }
 
-error_t dir(char *format, ...) {
-  error_t err = {0};
+error_t
+dir (char *format, ...)
+{
+  error_t err = { 0 };
   err.null = true; // success by default
 
   va_list args;
-  va_start(args, format);
+  va_start (args, format);
 
   char path[1024];
-  vsnprintf(path, sizeof(path), format, args);
+  vsnprintf (path, sizeof (path), format, args);
 
-  va_end(args);
+  va_end (args);
 
-  if (mkdir(path, 0777) < 0) {
-    err.null = false;
-    err.status = errno;
-    err.src = strerror(errno);
-  }
+  if (mkdir (path, 0777) < 0)
+    {
+      err.null = false;
+      err.status = errno;
+      err.src = strerror (errno);
+    }
 
   return err;
 }
 
-error_t take(const char *dirname) {
-  error_t err = dir("%s", dirname);
-  if (!err.null) {
-    return err;
-  }
-  if (chdir(dirname) != 0) {
-    err.null = false;
-    err.status = errno;
-    err.src = strerror(errno);
-    return err;
-  }
+error_t
+take (const char *dirname)
+{
+  error_t err = dir ("%s", dirname);
+  if (!err.null)
+    {
+      return err;
+    }
+  if (chdir (dirname) != 0)
+    {
+      err.null = false;
+      err.status = errno;
+      err.src = strerror (errno);
+      return err;
+    }
   return err;
 }

core/standard.c

@@ -0,0 +1,29 @@
+#include "standard.h"
+#include "../config.h"
+#include "print.h"
+#include <stdlib.h>
+#include <string.h>
+
+int
+parse_standard_options (void (*usage) (), int argc, char **argv)
+{
+  for (int i = 1; i < argc; ++i)
+    {
+      if (strcmp (argv[i], "--help") == 0)
+        {
+          usage ();
+          exit (0);
+        }
+      else if (strcmp (argv[i], "--version") == 0)
+        {
+          printfn ("%s (%s) %s\nCopyright (C) %d %s.\n%s\n"
+                   "This is free software: you are free to change "
+                   "and redistribute it.\nThere is NO WARRANTY, to the extent "
+                   "permitted by law.",
+                   PROGRAM, ORGANIZATION, VERSION, YEAR, ORGANIZATION,
+                   LICENCE_LINE);
+          exit (0);
+        }
+    }
+  return -1;
+}

core/standard.h

@@ -0,0 +1,6 @@
+#ifndef STANDARD_H
+#define STANDARD_H
+
+int parse_standard_options(void (*)(), int argc, char **argv);
+
+#endif