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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Generates all possible matching inputs for a command string.
* --
* Copyright (C) 2016 Cumulus Networks, Inc.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "command.h"
#include "graph.h"
#include "vector.h"
#define USAGE "usage: permutations <cmdstr>"
void permute(struct graph_node *);
void pretty_print_graph(struct graph_node *start, int level);
int main(int argc, char *argv[])
{
if (argc < 2) {
fprintf(stdout, USAGE "\n");
exit(EXIT_SUCCESS);
}
struct cmd_element *cmd = XCALLOC(MTYPE_TMP,
sizeof(struct cmd_element));
cmd->string = strdup(argv[1]);
struct graph *graph = graph_new();
struct cmd_token *token =
cmd_token_new(START_TKN, cmd->attr, NULL, NULL);
graph_new_node(graph, token, NULL);
cmd_graph_parse(graph, cmd);
permute(vector_slot(graph->nodes, 0));
}
void permute(struct graph_node *start)
{
static struct list *position = NULL;
if (!position)
position = list_new();
struct cmd_token *stok = start->data;
struct graph_node *gnn;
struct listnode *ln;
bool is_neg = false;
// recursive dfs
listnode_add(position, start);
for (ALL_LIST_ELEMENTS_RO(position, ln, gnn)) {
struct cmd_token *tok = gnn->data;
if (tok->type == WORD_TKN && !strcmp(tok->text, "no")) {
is_neg = true;
break;
}
if (tok->type < SPECIAL_TKN)
break;
}
for (unsigned int i = 0; i < vector_active(start->to); i++) {
struct graph_node *gn = vector_slot(start->to, i);
struct cmd_token *tok = gn->data;
if (tok->attr & CMD_ATTR_HIDDEN)
continue;
else if (tok->type == END_TKN || gn == start) {
fprintf(stdout, " ");
for (ALL_LIST_ELEMENTS_RO(position, ln, gnn)) {
struct cmd_token *tt = gnn->data;
if (tt->type < SPECIAL_TKN)
fprintf(stdout, " %s", tt->text);
}
if (gn == start)
fprintf(stdout, "...");
fprintf(stdout, "\n");
} else {
bool skip = false;
if (tok->type == NEG_ONLY_TKN && !is_neg)
continue;
if (stok->type == FORK_TKN && tok->type != FORK_TKN)
for (ALL_LIST_ELEMENTS_RO(position, ln, gnn))
if (gnn == gn) {
skip = true;
break;
}
if (!skip)
permute(gn);
}
}
list_delete_node(position, listtail(position));
}
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