/* Return the length of a string in target memory or -TARGET_EFAULT if
access error */
abi_long target_strlen(abi_ulong guest_addr1)
{
uint8_t *ptr;
abi_ulong guest_addr;
int max_len, len;
guest_addr = guest_addr1;
for(;;) {
max_len = TARGET_PAGE_SIZE - (guest_addr & ~TARGET_PAGE_MASK);
ptr = lock_user(VERIFY_READ, guest_addr, max_len, 1);
if (!ptr)
return -TARGET_EFAULT;
len = qemu_strnlen(ptr, max_len);
unlock_user(ptr, guest_addr, 0);
guest_addr += len;
/* we don't allow wrapping or integer overflow */
if (guest_addr == 0 ||
(guest_addr - guest_addr1) > 0x7fffffff)
return -TARGET_EFAULT;
if (len != max_len)
break;
}
return guest_addr - guest_addr1;
}
void strpadcpy(char *buf, int buf_size, const char *str, char pad)
{
int len = qemu_strnlen(str, buf_size);
memcpy(buf, str, len);
memset(buf + len, pad, buf_size - len);
}
