tesseract-ocr/cutil/emalloc.cpp

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/******************************************************************************
 **                                                     Filename:
              emalloc.c
**                                                      Purpose:
              Routines for trapping memory allocation errors.
**                                                      Author:
              Dan Johnson
              HP-UX 6.2
              HP-UX 6.2
**                                                      History:
              4/3/89, DSJ, Created.
**
**      (c) Copyright Hewlett-Packard Company, 1988.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
******************************************************************************/
#include "emalloc.h"
#include "danerror.h"
#include <stdlib.h>

/*---------------------------------------------------------------------------*/
void *Emalloc(size_t Size) { 
/*
 **                                                     Parameters:
 **                                                     Size
              number of bytes of memory to be allocated
**                                                      Globals: none
**                                                      Operation:
**                                                      This routine attempts to allocate the specified number of
**                                                      bytes.  If the memory can be allocated, a pointer to the
**                                                      memory is returned.  If the memory cannot be allocated, or
**                                                      if the allocation request is negative or zero,
**                                                      an error is trapped.
**                                                      Return: Pointer to allocated memory.
**                                                      Exceptions: NOTENOUGHMEMORY
              unable to allocate Size bytes
**                                                      ILLEGALMALLOCREQUEST
              negative or zero request size
**                                                      History: 4/3/89, DSJ, Created.
*/
  void *Buffer;

  if (Size <= 0)
    DoError (ILLEGALMALLOCREQUEST, "Illegal malloc request size");
  Buffer = (void *) malloc (Size);
  if (Buffer == NULL) {
    DoError (NOTENOUGHMEMORY, "Not enough memory");
    return (NULL);
  }
  else
    return (Buffer);

}                                /* Emalloc */


/*---------------------------------------------------------------------------*/
void *Erealloc(void *ptr, size_t size) { 
  void *Buffer;

  if (size < 0 || (size == 0 && ptr == NULL))
    DoError (ILLEGALMALLOCREQUEST, "Illegal realloc request size");

  Buffer = (void *) realloc (ptr, size);
  if (Buffer == NULL && size != 0)
    DoError (NOTENOUGHMEMORY, "Not enough memory");
  return (Buffer);

}                                /* Erealloc */


/*---------------------------------------------------------------------------*/
void Efree(void *ptr) { 
  if (ptr == NULL)
    DoError (ILLEGALMALLOCREQUEST, "Attempted to free NULL ptr");

  free(ptr); 

}                                /* Efree */