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BIRD Client: Refactore cmd_find_common_match()

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This commit is contained in:
Pavel Tvrdik 2016-04-21 16:00:29 +02:00
parent 822e2f1cc7
commit c0b101a1de
1 changed files with 34 additions and 33 deletions
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67
client/commands.c
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@ -36,8 +36,8 @@ struct cmd_node {
struct cmd_info *cmd; /* Short info */
struct cmd_info *help; /* Detailed info */
signed char prio; /* Priority */
int len; /* Length of string in token */
u32 flags; /* Mask of (CLI_SF_*) */
int len; /* Length of string in token */
char token[1]; /* Name of command */
};
@ -188,6 +188,29 @@ cmd_help(char *cmd, int len)
cmd_display_help(m->help, m->cmd);
}
/*
* Return length of common prefix of all matches,
* Write common prefix string into buf
*/
static int
cmd_merge_match_with_others(int max_common_len, const char *token_name, int token_len, char *buf, int from)
{
if (max_common_len < 0)
{
/* For a case that we'll have exactly one match */
strcpy(buf, token_name + from);
max_common_len = token_len - from;
}
else
{
int i = 0;
while (i < max_common_len && i < token_len - from && buf[i] == token_name[from+i])
i++;
max_common_len = i;
}
return max_common_len;
}
/*
* Return length of common prefix of all matches,
* Write count of all matches into pcount,
@ -197,11 +220,11 @@ static int
cmd_find_common_match(struct cmd_node *root, char *cmd, int len, int *pcount, char *buf)
{
struct cmd_node *m;
int best, /* len of common prefix */
best_prio, i;
int max_common_len;
int best_prio, i;
*pcount = 0;
best = -1;
max_common_len = -1;
best_prio = -1;
for(m=root->son; m; m=m->sibling)
{
@ -214,24 +237,14 @@ cmd_find_common_match(struct cmd_node *root, char *cmd, int len, int *pcount, ch
if (best_prio < m->prio)
{
*pcount = 0;
best = -1;
max_common_len = -1;
}
if (max_common_len < 0)
best_prio = m->prio;
(*pcount)++;
if (best < 0)
{
/* For a case that we'll have exactly one match */
strcpy(buf, m->token + len);
best = m->len - len;
best_prio = m->prio;
}
else
{
i = 0;
while (i < best && i < m->len - len && buf[i] == m->token[len+i])
i++;
best = i;
}
max_common_len = cmd_merge_match_with_others(max_common_len, m->token, m->len, buf, len);
}
list *syms = cli_get_symbol_list();
@ -245,22 +258,10 @@ cmd_find_common_match(struct cmd_node *root, char *cmd, int len, int *pcount, ch
continue;
(*pcount)++;
if (best < 0)
{
strcpy(buf, sym->name + len);
best = sym->len - len; /* for a case that we'll have only one match */
}
else
{
i = 0;
while (i < best && i < sym->len - len && buf[i] == sym->name[len+i])
i++;
best = i;
}
max_common_len = cmd_merge_match_with_others(max_common_len, sym->name, sym->len, buf, len);
}
return best;
return max_common_len;
}
int