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ICU-2397 more portable check for even (2-aligned) pointer

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X-SVN-Rev: 10836
This commit is contained in:
Markus Scherer 2003-01-10 21:00:47 +00:00
parent 24ebb71255
commit e03434154e
1 changed files with 4 additions and 2 deletions
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6
icu4c/source/common/uiter.cpp
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@ -21,6 +21,8 @@
#include "unicode/uiter.h"
#include "cstring.h"
#define IS_POINTER_EVEN(p) (((size_t)p&1)==0)
U_CDECL_BEGIN
/* No-Op UCharIterator implementation for illegal input --------------------- */
@ -255,7 +257,7 @@ static const UCharIterator utf16BEIterator={
*/
static int32_t
utf16BE_strlen(const char *s) {
if(((int32_t)s&1)==0) {
if(IS_POINTER_EVEN(s)) {
/*
* even-aligned, call u_strlen(s)
* we are probably on a little-endian machine, but searching for UChar NUL
@ -278,7 +280,7 @@ uiter_setUTF16BE(UCharIterator *iter, const char *s, int32_t length) {
if(iter!=0) {
/* allow only even-length strings (the input length counts bytes) */
if(s!=0 && length==-1 || (length>=0 && (length&1)==0)) {
if(U_IS_BIG_ENDIAN && ((int32_t)s&1)==0) {
if(U_IS_BIG_ENDIAN && IS_POINTER_EVEN(s)) {
/* big-endian machine and 2-aligned UTF-16BE string: use normal UChar iterator */
uiter_setString(iter, (const UChar *)s, length/2);
return;