safeclib.c

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/*
  safe_clib.c  -  Portable and safe wrapers around some clib functions and some tools

   Copyright (C)
     2008,            Christian Thaeter <ct@pipapo.org>

  **Lumiera** is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2 of the License, or (at your
  option) any later version. See the file COPYING for further details.

* *****************************************************************/


#include "lib/error.h"
#include "lib/safeclib.h"

#include <string.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdint.h>
#include <nobug.h>


LUMIERA_ERROR_DEFINE (NO_MEMORY, "Out of Memory!");


enum lumiera_resource
  {
    LUMIERA_RESOURCE_MEMORY,
//  /** OS filehandles **/
//  LUMIERA_RESOURCE_FILEHANDLE,
//  /** CPU time, as in threads and such  **/
//  LUMIERA_RESOURCE_CPU,
//  /** mmaped regions **/
//  LUMIERA_RESOURCE_MMAP,
//  /** disk space for the storage area, context is a pointer to the filename indication the device **/
//  LUMIERA_RESOURCE_DISKSTORAGE,
//  /** disk bandwidth for the storage area, context is a pointer to the filename indication the device **/
//  LUMIERA_RESOURCE_STORAGEBANDWIDTH,
//  /** disk space for the caching area, context is a pointer to the filename indication the device **/
//  LUMIERA_RESOURCE_DISKCACHE,
//  /** disk bandwidth for the caching area, context is a pointer to the filename indication the device **/
//  LUMIERA_RESOURCE_CACHEBANDWIDTH,

    LUMIERA_RESOURCE_END /* last entry */
  };


enum lumiera_resource_try
  {
    LUMIERA_RESOURCE_NONE,
    LUMIERA_RESOURCE_ONE,
    LUMIERA_RESOURCE_SOME,
    LUMIERA_RESOURCE_MANY,
    LUMIERA_RESOURCE_ALL,
    LUMIERA_RESOURCE_PANIC,
    LUMIERA_RESOURCE_UNREGISTER
  };


static int
die_no_mem (enum lumiera_resource which, enum lumiera_resource_try* iteration, void* context)
{
  (void) which; (void) iteration; (void) context;
  LUMIERA_DIE (NO_MEMORY);
  return 0; /* not reached */
}


void*
lumiera_malloc (size_t size)
{
  enum lumiera_resource_try iteration = LUMIERA_RESOURCE_ONE;
  void* o = NULL;

  if (size)
    {
      o = malloc (size);
      if (!o)
        die_no_mem (LUMIERA_RESOURCE_MEMORY, &iteration, &size);
    }

  return o;
}


void*
lumiera_calloc (size_t n, size_t size)
{
  enum lumiera_resource_try iteration = LUMIERA_RESOURCE_ONE;
  void* o = NULL;

  size_t gross = n*size;

  if (n&&size)
    {
      o = calloc (n, size);
      if (!o)
        die_no_mem (LUMIERA_RESOURCE_MEMORY, &iteration, &gross);
    }

  return o;
}


void*
lumiera_realloc (void* ptr, size_t size)
{
  enum lumiera_resource_try iteration = LUMIERA_RESOURCE_ONE;
  void* o = NULL;

  if (size)
    {
      o = realloc (ptr, size);
      if (!o)
        die_no_mem (LUMIERA_RESOURCE_MEMORY, &iteration, &size);
    }

  return o;
}


char*
lumiera_strndup (const char* str, size_t len)
{
  enum lumiera_resource_try iteration = LUMIERA_RESOURCE_ONE;
  void* o = NULL;

    if (str && len)
      o = strndup (str, len);
    else
      o = strdup ("");

  if (!o)
    die_no_mem (LUMIERA_RESOURCE_MEMORY, &iteration, &len);

  return o;
}


int
lumiera_strncmp (const char* a, const char* b, size_t len)
{
  return a == b ? 0 : strncmp (a?a:"", b?b:"", len);
}


int
lumiera_streq (const char* a, const char* b)
{
  return !lumiera_strncmp (a, b, SIZE_MAX);
}




/*
// Local Variables:
// mode: C
// c-file-style: "gnu"
// indent-tabs-mode: nil
// End:
*/