Check in the pristine copy of ICU 4.6...

icu46/source/tools/tzcode/ialloc.c

+/*
+** This file is in the public domain, so clarified as of
+** 2006-07-17 by Arthur David Olson.
+*/
+
+#ifndef lint
+#ifndef NOID
+static char     elsieid[] = "@(#)ialloc.c       8.30";
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+/*LINTLIBRARY*/
+
+#include "private.h"
+
+#define nonzero(n)      (((n) == 0) ? 1 : (n))
+
+char *
+imalloc(n)
+const int       n;
+{
+        return malloc((size_t) nonzero(n));
+}
+
+char *
+icalloc(nelem, elsize)
+int     nelem;
+int     elsize;
+{
+        if (nelem == 0 || elsize == 0)
+                nelem = elsize = 1;
+        return calloc((size_t) nelem, (size_t) elsize);
+}
+
+void *
+irealloc(pointer, size)
+void * const    pointer;
+const int       size;
+{
+        if (pointer == NULL)
+                return imalloc(size);
+        return realloc((void *) pointer, (size_t) nonzero(size));
+}
+
+char *
+icatalloc(old, new)
+char * const            old;
+const char * const      new;
+{
+        register char * result;
+        register int    oldsize, newsize;
+
+        newsize = (new == NULL) ? 0 : strlen(new);
+        if (old == NULL)
+                oldsize = 0;
+        else if (newsize == 0)
+                return old;
+        else    oldsize = strlen(old);
+        if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
+                if (new != NULL)
+                        (void) strcpy(result + oldsize, new);
+        return result;
+}
+
+char *
+icpyalloc(string)
+const char * const      string;
+{
+        return icatalloc((char *) NULL, string);
+}
+
+void
+ifree(p)
+char * const    p;
+{
+        if (p != NULL)
+                (void) free(p);
+}
+
+void
+icfree(p)
+char * const    p;
+{
+        if (p != NULL)
+                (void) free(p);
+}