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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include "bh_common.h"
static char *
align_ptr(char *src, unsigned int b)
{
uintptr_t v = (uintptr_t)src;
uintptr_t m = b - 1;
return (char *)((v + m) & ~m);
}
/*
Memory copy, with word alignment
*/
int
b_memcpy_wa(void *s1, unsigned int s1max, const void *s2, unsigned int n)
{
char *dest = (char *)s1;
char *src = (char *)s2;
char *pa = align_ptr(src, 4);
char *pb = align_ptr((src + n), 4);
unsigned int buff;
const char *p_byte_read;
unsigned int *p;
char *ps;
if (pa > src) {
pa -= 4;
}
for (p = (unsigned int *)pa; p < (unsigned int *)pb; p++) {
buff = *(p);
p_byte_read = ((char *)&buff);
/* read leading word */
if ((char *)p <= src) {
for (ps = src; ps < ((char *)p + 4); ps++) {
if (ps >= src + n) {
break;
}
p_byte_read = ((char *)&buff) + (ps - (char *)p);
*dest++ = *p_byte_read;
}
}
/* read trailing word */
else if ((char *)p >= pb - 4) {
for (ps = (char *)p; ps < src + n; ps++) {
*dest++ = *p_byte_read++;
}
}
/* read meaning word(s) */
else {
if ((char *)p + 4 >= src + n) {
for (ps = (char *)p; ps < src + n; ps++) {
*dest++ = *p_byte_read++;
}
}
else {
*(unsigned int *)dest = buff;
dest += 4;
}
}
}
return 0;
}
int
b_memcpy_s(void *s1, unsigned int s1max, const void *s2, unsigned int n)
{
char *dest = (char *)s1;
char *src = (char *)s2;
if (n == 0) {
return 0;
}
if (s1 == NULL) {
return -1;
}
if (s2 == NULL || n > s1max) {
memset(dest, 0, s1max);
return -1;
}
memcpy(dest, src, n);
return 0;
}
int
b_memmove_s(void *s1, unsigned int s1max, const void *s2, unsigned int n)
{
char *dest = (char *)s1;
char *src = (char *)s2;
if (n == 0) {
return 0;
}
if (s1 == NULL) {
return -1;
}
if (s2 == NULL || n > s1max) {
memset(dest, 0, s1max);
return -1;
}
memmove(dest, src, n);
return 0;
}
int
b_strcat_s(char *s1, unsigned int s1max, const char *s2)
{
if (NULL == s1 || NULL == s2 || s1max < (strlen(s1) + strlen(s2) + 1)) {
return -1;
}
memcpy(s1 + strlen(s1), s2, strlen(s2) + 1);
return 0;
}
int
b_strcpy_s(char *s1, unsigned int s1max, const char *s2)
{
if (NULL == s1 || NULL == s2 || s1max < (strlen(s2) + 1)) {
return -1;
}
memcpy(s1, s2, strlen(s2) + 1);
return 0;
}
char *
bh_strdup(const char *s)
{
uint32 size;
char *s1 = NULL;
if (s) {
size = (uint32)(strlen(s) + 1);
if ((s1 = BH_MALLOC(size)))
bh_memcpy_s(s1, size, s, size);
}
return s1;
}
char *
wa_strdup(const char *s)
{
uint32 size;
char *s1 = NULL;
if (s) {
size = (uint32)(strlen(s) + 1);
if ((s1 = WA_MALLOC(size)))
bh_memcpy_s(s1, size, s, size);
}
return s1;
}
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