size_t str_common_utf(const basic_string<C>& s1, const basic_string<C>& s2, size_t start = 0) noexcept {
size_t n = str_common(s1, s2, start);
if (n == 0 || sizeof(C) == 4)
return n;
size_t pos = start + n;
if (! is_following_unit(s1[pos]) && ! is_following_unit(s2[pos]))
return n;
--pos;
while (pos > start && is_following_unit(s1[pos]))
--pos;
return pos - start;
}
void msh_auto_complete(char *prefix)
{
int length, min_length;
const char *name_ptr, *cmd_name;
struct finsh_syscall *index;
min_length = 0;
name_ptr = RT_NULL;
if (*prefix == '\0')
{
msh_help(0, RT_NULL);
return;
}
#ifdef RT_USING_DFS
/* check whether a spare in the command */
{
char *ptr;
ptr = prefix + rt_strlen(prefix);
while (ptr != prefix)
{
if (*ptr == ' ')
{
msh_auto_complete_path(ptr + 1);
break;
}
ptr --;
}
#ifdef RT_USING_MODULE
/* There is a chance that the user want to run the module directly. So
* try to complete the file names. If the completed path is not a
* module, the system won't crash anyway. */
if (ptr == prefix)
{
msh_auto_complete_path(ptr);
}
#endif
}
#endif
/* checks in internal command */
{
for (index = _syscall_table_begin; index < _syscall_table_end; FINSH_NEXT_SYSCALL(index))
{
/* skip finsh shell function */
if (strncmp(index->name, "__cmd_", 6) != 0) continue;
cmd_name = (const char *) &index->name[6];
if (strncmp(prefix, cmd_name, strlen(prefix)) == 0)
{
if (min_length == 0)
{
/* set name_ptr */
name_ptr = cmd_name;
/* set initial length */
min_length = strlen(name_ptr);
}
length = str_common(name_ptr, cmd_name);
if (length < min_length)
min_length = length;
rt_kprintf("%s\n", cmd_name);
}
}
}
/* auto complete string */
if (name_ptr != NULL)
{
rt_strncpy(prefix, name_ptr, min_length);
}
return ;
}
void msh_auto_complete_path(char *path)
{
DIR *dir = RT_NULL;
struct dirent *dirent = RT_NULL;
char *full_path, *ptr, *index;
if (!path)
return;
full_path = (char *)rt_malloc(256);
if (full_path == RT_NULL) return; /* out of memory */
if (*path != '/')
{
getcwd(full_path, 256);
if (full_path[rt_strlen(full_path) - 1] != '/')
strcat(full_path, "/");
}
else *full_path = '\0';
index = RT_NULL;
ptr = path;
for (;;)
{
if (*ptr == '/') index = ptr + 1; if (!*ptr) break; ptr ++;
}
if (index == RT_NULL) index = path;
if (index != RT_NULL)
{
char *dest = index;
/* fill the parent path */
ptr = full_path;
while (*ptr) ptr ++;
for (index = path; index != dest;)
*ptr++ = *index++;
*ptr = '\0';
dir = opendir(full_path);
if (dir == RT_NULL) /* open directory failed! */
{
rt_free(full_path);
return;
}
/* restore the index position */
index = dest;
}
/* auto complete the file or directory name */
if (*index == '\0') /* display all of files and directories */
{
for (;;)
{
dirent = readdir(dir);
if (dirent == RT_NULL) break;
rt_kprintf("%s\n", dirent->d_name);
}
}
else
{
int length, min_length;
min_length = 0;
for (;;)
{
dirent = readdir(dir);
if (dirent == RT_NULL) break;
/* matched the prefix string */
if (strncmp(index, dirent->d_name, rt_strlen(index)) == 0)
{
if (min_length == 0)
{
min_length = rt_strlen(dirent->d_name);
/* save dirent name */
strcpy(full_path, dirent->d_name);
}
length = str_common(dirent->d_name, full_path);
if (length < min_length)
{
min_length = length;
}
}
}
if (min_length)
{
if (min_length < rt_strlen(full_path))
{
/* list the candidate */
rewinddir(dir);
for (;;)
{
dirent = readdir(dir);
if (dirent == RT_NULL) break;
if (strncmp(index, dirent->d_name, rt_strlen(index)) == 0)
rt_kprintf("%s\n", dirent->d_name);
}
}
length = index - path;
memcpy(index, full_path, min_length);
path[length + min_length] = '\0';
}
}
closedir(dir);
rt_free(full_path);
}
