import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

intl/icu/source/tools/tzcode/ialloc.c

@@ -0,0 +1,32 @@
+/*
+** This file is in the public domain, so clarified as of
+** 2006-07-17 by Arthur David Olson.
+*/
+
+/*LINTLIBRARY*/
+
+#include "private.h"
+
+char *
+icatalloc(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 = realloc(old, oldsize + newsize + 1)) != NULL)
+		if (new != NULL)
+			(void) strcpy(result + oldsize, new);
+	return result;
+}
+
+char *
+icpyalloc(const char *const string)
+{
+	return icatalloc(NULL, string);
+}