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#include <ncmd.h>
int sanitize(char *cmd)
{
check(cmd != NULL, "cmd is NULL");
int len = strlen(cmd);
check(len > 0, "cmd empty");
// replace newline character with NUL.
for (int i = 0; i < len; i++) {
if (cmd[i] == '\n') {
cmd[i] = '\0';
break;
}
}
return 0;
error:
return -1;
}
char *check_cmd(char *cmd)
{
char *err = NULL;
check(cmd != NULL, "cmd is NULL");
int rc = sanitize(cmd);
check(rc != -1, "sanitize failed");
size_t len = strlen(cmd);
if (len >= CMD_MIN_SIZE && len <= CMD_MAX_SIZE) {
return NULL;
}
if (len == 0) {
err = "closing connection\n";
} else {
err = "command size invalid\n";
}
return err;
error:
err = "internal error\n";
return err;
}
struct bstrList *cmd_parts(char *cmd)
{
bstring bcmd = NULL;
struct bstrList *parts_tmp = NULL;
bcmd = bfromcstr(cmd);
check(bcmd != NULL, "bstring creation failed");
parts_tmp = bsplit(bcmd, ' ');
check(parts_tmp != NULL, "cmp split failed");
check(parts_tmp->qty > 0, "qty check failed");
struct bstrList *parts = bstrListCreate();
check(parts != NULL, "parts create failed");
int rc = bstrListAlloc(parts, parts_tmp->qty);
check(rc == BSTR_OK, "parts alloc failed");
check(parts->qty == 0, "qty check failed");
bstring part = NULL;
int index = 0;
for (int i = 0; i < parts_tmp->qty; i++) {
check(parts->qty <= parts->mlen, "parts capacity check failed");
part = parts_tmp->entry[i];
if (blength(part) == 0) {
continue;
}
parts->entry[index++] = bstrcpy(part);
parts->qty++;
}
// Clean up.
bdestroy(bcmd);
bstrListDestroy(parts_tmp);
return parts;
error:
// Clean up.
if (bcmd) {
bdestroy(bcmd);
}
if (parts_tmp) {
bstrListDestroy(parts_tmp);
}
return NULL;
}
int find_function(struct bstrList *cmd_parts)
{
// functions.
struct tagbstring fcreate = bsStatic("/create");
struct tagbstring fsample = bsStatic("/sample");
struct tagbstring fmean = bsStatic("/mean");
struct tagbstring fdump = bsStatic("/dump");
struct tagbstring fdelete = bsStatic("/delete");
struct tagbstring flist = bsStatic("/list");
check(cmd_parts != NULL, "cmd_parts is NULL");
check(cmd_parts->qty > 0, "qty check failed");
bstring cmd_name = cmd_parts->entry[0];
check(blength(cmd_name) > 0, "cmd_name check failed");
// trim cmd name
int rc = btrimws(cmd_name);
check(rc == BSTR_OK, "cmd name trim failed");
// find function for cmd_name
if (bstricmp(cmd_name, &fcreate) == 0) {
check(cmd_parts->qty == 2, "cmd invalid");
return NS_CREATE;
} else if (bstricmp(cmd_name, &fsample) == 0) {
check(cmd_parts->qty == 3, "cmd invalid");
return NS_SAMPLE;
} else if (bstricmp(cmd_name, &fmean) == 0) {
check(cmd_parts->qty == 2, "cmd invalid");
return NS_MEAN;
} else if (bstricmp(cmd_name, &fdump) == 0) {
check(cmd_parts->qty == 2, "cmd invalid");
return NS_DUMP;
} else if (bstricmp(cmd_name, &fdelete) == 0) {
check(cmd_parts->qty == 2, "cmd invalid");
return NS_DELETE;
} else if (bstricmp(cmd_name, &flist) == 0) {
check(cmd_parts->qty == 1, "cmd invalid");
return NS_LIST;
} else {
return NS_NOP;
}
error:
return NS_NOP;
}
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