tesseract  3.04.00
emalloc.cpp
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1 /******************************************************************************
2  ** Filename:
3  emalloc.c
4 ** Purpose:
5  Routines for trapping memory allocation errors.
6 ** Author:
7  Dan Johnson
8  HP-UX 6.2
9  HP-UX 6.2
10 ** History:
11  4/3/89, DSJ, Created.
12 **
13 ** (c) Copyright Hewlett-Packard Company, 1988.
14 ** Licensed under the Apache License, Version 2.0 (the "License");
15 ** you may not use this file except in compliance with the License.
16 ** You may obtain a copy of the License at
17 ** http://www.apache.org/licenses/LICENSE-2.0
18 ** Unless required by applicable law or agreed to in writing, software
19 ** distributed under the License is distributed on an "AS IS" BASIS,
20 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
21 ** See the License for the specific language governing permissions and
22 ** limitations under the License.
23 ******************************************************************************/
27 #include "emalloc.h"
28 #include "danerror.h"
29 #include <stdlib.h>
30 
34 /*---------------------------------------------------------------------------*/
35 void *Emalloc(int Size) {
36 /*
37  ** Parameters:
38  ** Size
39  number of bytes of memory to be allocated
40 ** Globals: none
41 ** Operation:
42 ** This routine attempts to allocate the specified number of
43 ** bytes. If the memory can be allocated, a pointer to the
44 ** memory is returned. If the memory cannot be allocated, or
45 ** if the allocation request is negative or zero,
46 ** an error is trapped.
47 ** Return: Pointer to allocated memory.
48 ** Exceptions: NOTENOUGHMEMORY
49  unable to allocate Size bytes
50 ** ILLEGALMALLOCREQUEST
51  negative or zero request size
52 ** History: 4/3/89, DSJ, Created.
53 */
54  void *Buffer;
55 
56  if (Size <= 0)
57  DoError (ILLEGALMALLOCREQUEST, "Illegal malloc request size");
58  Buffer = (void *) malloc (Size);
59  if (Buffer == NULL) {
60  DoError (NOTENOUGHMEMORY, "Not enough memory");
61  return (NULL);
62  }
63  else
64  return (Buffer);
65 
66 } /* Emalloc */
67 
68 
69 /*---------------------------------------------------------------------------*/
70 void *Erealloc(void *ptr, int size) {
71  void *Buffer;
72 
73  if (size < 0 || (size == 0 && ptr == NULL))
74  DoError (ILLEGALMALLOCREQUEST, "Illegal realloc request size");
75 
76  Buffer = (void *) realloc (ptr, size);
77  if (Buffer == NULL && size != 0)
78  DoError (NOTENOUGHMEMORY, "Not enough memory");
79  return (Buffer);
80 
81 } /* Erealloc */
82 
83 
84 /*---------------------------------------------------------------------------*/
85 void Efree(void *ptr) {
86  if (ptr == NULL)
87  DoError (ILLEGALMALLOCREQUEST, "Attempted to free NULL ptr");
88 
89  free(ptr);
90 
91 } /* Efree */
#define NULL
Definition: host.h:144
void * Erealloc(void *ptr, int size)
Definition: emalloc.cpp:70
#define ILLEGALMALLOCREQUEST
Definition: emalloc.h:28
void Efree(void *ptr)
Definition: emalloc.cpp:85
void DoError(int Error, const char *Message)
Definition: danerror.cpp:32
#define NOTENOUGHMEMORY
Definition: emalloc.h:27
void * Emalloc(int Size)
Definition: emalloc.cpp:35