mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-09 20:58:44 +00:00
134 lines
2.6 KiB
C
134 lines
2.6 KiB
C
/*
|
|
* BIRD Client -- Command Handling
|
|
*
|
|
* (c) 1999--2000 Martin Mares <mj@ucw.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "nest/bird.h"
|
|
#include "lib/resource.h"
|
|
#include "client/client.h"
|
|
|
|
struct cmd_info {
|
|
char *command;
|
|
char *args;
|
|
char *help;
|
|
int is_real_cmd;
|
|
};
|
|
|
|
static struct cmd_info command_table[] = {
|
|
#include "conf/commands.h"
|
|
};
|
|
|
|
/* FIXME: There should exist some system of aliases, so that `show' can be abbreviated as `s' etc. */
|
|
|
|
struct cmd_node {
|
|
struct cmd_node *sibling, *son, **plastson;
|
|
struct cmd_info *cmd;
|
|
int len;
|
|
char token[1];
|
|
};
|
|
|
|
static struct cmd_node cmd_root;
|
|
|
|
void
|
|
cmd_build_tree(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
cmd_root.plastson = &cmd_root.son;
|
|
|
|
for(i=0; i<sizeof(command_table) / sizeof(struct cmd_info); i++)
|
|
{
|
|
struct cmd_info *cmd = &command_table[i];
|
|
struct cmd_node *old, *new;
|
|
char *c = cmd->command;
|
|
|
|
old = &cmd_root;
|
|
while (*c)
|
|
{
|
|
char *d = c;
|
|
while (*c && *c != ' ')
|
|
c++;
|
|
for(new=old->son; new; new=new->sibling)
|
|
if (new->len == c-d && !memcmp(new->token, d, c-d))
|
|
break;
|
|
if (!new)
|
|
{
|
|
new = xmalloc(sizeof(struct cmd_node) + c-d);
|
|
*old->plastson = new;
|
|
old->plastson = &new->sibling;
|
|
new->sibling = new->son = NULL;
|
|
new->plastson = &new->son;
|
|
new->cmd = NULL;
|
|
new->len = c-d;
|
|
memcpy(new->token, d, c-d);
|
|
new->token[c-d] = 0;
|
|
}
|
|
old = new;
|
|
while (*c == ' ')
|
|
c++;
|
|
}
|
|
old->cmd = cmd;
|
|
}
|
|
}
|
|
|
|
static void
|
|
cmd_display_help(struct cmd_info *c)
|
|
{
|
|
char buf[strlen(c->command) + strlen(c->args) + 4];
|
|
|
|
sprintf(buf, "%s %s", c->command, c->args);
|
|
printf("%-45s %s\n", buf, c->help);
|
|
}
|
|
|
|
static struct cmd_node *
|
|
cmd_find_abbrev(struct cmd_node *root, char *cmd, int len)
|
|
{
|
|
struct cmd_node *m, *best = NULL, *best2 = NULL;
|
|
|
|
for(m=root->son; m; m=m->sibling)
|
|
{
|
|
if (m->len == len && !memcmp(m->token, cmd, len))
|
|
return m;
|
|
if (m->len > len && !memcmp(m->token, cmd, len))
|
|
{
|
|
best2 = best;
|
|
best = m;
|
|
}
|
|
}
|
|
return best2 ? NULL : best;
|
|
}
|
|
|
|
void
|
|
cmd_help(char *cmd, int len)
|
|
{
|
|
char *end = cmd + len;
|
|
struct cmd_node *n, *m;
|
|
char *z;
|
|
|
|
n = &cmd_root;
|
|
while (cmd < end)
|
|
{
|
|
if (*cmd == ' ' || *cmd == '\t')
|
|
{
|
|
cmd++;
|
|
continue;
|
|
}
|
|
z = cmd;
|
|
while (cmd < end && *cmd != ' ' && *cmd != '\t')
|
|
cmd++;
|
|
m = cmd_find_abbrev(n, z, cmd-z);
|
|
if (!m)
|
|
break;
|
|
n = m;
|
|
}
|
|
if (n->cmd && n->cmd->is_real_cmd)
|
|
cmd_display_help(n->cmd);
|
|
for (m=n->son; m; m=m->sibling)
|
|
cmd_display_help(m->cmd);
|
|
}
|