1 /* $OpenBSD: ialloc.c,v 1.10 2005/08/08 08:05:38 espie Exp $ */
2 /*
3 ** This file is in the public domain, so clarified as of
4 ** Feb 14, 2003 by Arthur David Olson (arthur_david_olson@nih.gov).
5 */
6
7 /*LINTLIBRARY*/
8
9 #include "private.h"
10
11 #define nonzero(n) (((n) == 0) ? 1 : (n))
12
13 char *
imalloc(n)14 imalloc(n)
15 const int n;
16 {
17 return malloc((size_t) nonzero(n));
18 }
19
20 char *
icalloc(nelem,elsize)21 icalloc(nelem, elsize)
22 int nelem;
23 int elsize;
24 {
25 if (nelem == 0 || elsize == 0)
26 nelem = elsize = 1;
27 return calloc((size_t) nelem, (size_t) elsize);
28 }
29
30 void *
irealloc(pointer,size)31 irealloc(pointer, size)
32 void * const pointer;
33 const int size;
34 {
35 void *p;
36
37 if (pointer == NULL)
38 return imalloc(size);
39 p = realloc((void *) pointer, (size_t) nonzero(size));
40 if (p == NULL)
41 free(pointer);
42 return p;
43 }
44
45 char *
icatalloc(old,new)46 icatalloc(old, new)
47 char * const old;
48 const char * const new;
49 {
50 register char * result;
51 register int oldsize, newsize;
52
53 newsize = (new == NULL) ? 0 : strlen(new);
54 if (old == NULL)
55 oldsize = 0;
56 else if (newsize == 0)
57 return old;
58 else
59 oldsize = strlen(old);
60 if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
61 if (new != NULL)
62 (void) strlcpy(result + oldsize, new, newsize + 1);
63 return result;
64 }
65
66 char *
icpyalloc(string)67 icpyalloc(string)
68 const char * const string;
69 {
70 return icatalloc((char *) NULL, string);
71 }
72
73 void
ifree(p)74 ifree(p)
75 char * const p;
76 {
77 if (p != NULL)
78 (void) free(p);
79 }
80
81 void
icfree(p)82 icfree(p)
83 char * const p;
84 {
85 if (p != NULL)
86 (void) free(p);
87 }
88