diff options
Diffstat (limited to 'src/vlib/unix/cli.c')
| -rw-r--r-- | src/vlib/unix/cli.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/vlib/unix/cli.c b/src/vlib/unix/cli.c index 88e2453cff2..cf524213f5b 100644 --- a/src/vlib/unix/cli.c +++ b/src/vlib/unix/cli.c @@ -1230,6 +1230,8 @@ unix_cli_line_process_one (unix_cli_main_t * cm, u8 input, unix_cli_parse_action_t action) { u8 *prev; + u8 *save = 0; + u8 **possible_commands; int j, delta; switch (action) @@ -1553,6 +1555,157 @@ unix_cli_line_process_one (unix_cli_main_t * cm, break; case UNIX_CLI_PARSE_ACTION_TAB: + if (cf->cursor < vec_len (cf->current_command)) + { + /* if we are in the middle of a line, complete only if + * the cursor points to whitespace */ + if (isspace (cf->current_command[cf->cursor])) + { + /* save and clear any input that is after the cursor */ + vec_resize (save, vec_len (cf->current_command) - cf->cursor); + clib_memcpy (save, cf->current_command + cf->cursor, + vec_len (cf->current_command) - cf->cursor); + _vec_len (cf->current_command) = cf->cursor; + } + else + { + unix_vlib_cli_output_raw (cf, uf, (u8 *) "\a", 1); + break; + } + } + possible_commands = + vlib_cli_get_possible_completions (cf->current_command); + if (vec_len (possible_commands) == 1) + { + u32 j = cf->cursor; + u8 *completed = possible_commands[0]; + + /* find the last word of current_command */ + while (j >= 1 && !isspace (cf->current_command[j - 1])) + { + j--; + unix_vlib_cli_output_raw (cf, uf, (u8 *) "\b", 1); + } + _vec_len (cf->current_command) = j; + + /* replace it with the newly expanded command */ + vec_append (cf->current_command, completed); + + /* echo to the terminal */ + unix_vlib_cli_output_raw (cf, uf, completed, vec_len (completed)); + + /* add one trailing space if needed */ + if (vec_len (save) == 0) + { + vec_add1 (cf->current_command, ' '); + unix_vlib_cli_output_raw (cf, uf, (u8 *) " ", 1); + } + + cf->cursor = vec_len (cf->current_command); + + } + else if (vec_len (possible_commands) >= 2) + { + u8 **possible_command; + uword max_command_len = 0, min_command_len = ~0; + u32 i, j; + + vec_foreach (possible_command, possible_commands) + { + if (vec_len (*possible_command) > max_command_len) + { + max_command_len = vec_len (*possible_command); + } + if (vec_len (*possible_command) < min_command_len) + { + min_command_len = vec_len (*possible_command); + } + } + + unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); + + i = 0; + vec_foreach (possible_command, possible_commands) + { + if (i + max_command_len >= cf->width) + { + unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); + i = 0; + } + unix_vlib_cli_output_raw (cf, uf, *possible_command, + vec_len (*possible_command)); + for (j = vec_len (*possible_command); j < max_command_len + 2; + j++) + { + unix_vlib_cli_output_raw (cf, uf, (u8 *) " ", 1); + } + i += max_command_len + 2; + } + + unix_vlib_cli_output_cooked (cf, uf, (u8 *) "\n", 1); + + /* rewrite prompt */ + unix_cli_cli_prompt (cf, uf); + unix_vlib_cli_output_raw (cf, uf, cf->current_command, + vec_len (cf->current_command)); + + /* count length of last word */ + j = cf->cursor; + i = 0; + while (j >= 1 && !isspace (cf->current_command[j - 1])) + { + j--; + i++; + } + + /* determine smallest common command */ + for (; i < min_command_len; i++) + { + u8 common = '\0'; + int stop = 0; + vec_foreach (possible_command, possible_commands) + { + if (common == '\0') + { + common = (*possible_command)[i]; + } + else if (common != (*possible_command)[i]) + { + stop = 1; + break; + } + } + if (!stop) + { + vec_add1 (cf->current_command, common); + cf->cursor++; + unix_vlib_cli_output_raw (cf, uf, (u8 *) & common, 1); + } + else + { + break; + } + } + } + else + { + unix_vlib_cli_output_raw (cf, uf, (u8 *) "\a", 1); + } + + if (vec_len (save) > 0) + { + /* restore remaining input if tab was hit in the middle of a line */ + unix_vlib_cli_output_raw (cf, uf, save, vec_len (save)); + for (j = 0; j < vec_len (save); j++) + { + unix_vlib_cli_output_raw (cf, uf, (u8 *) "\b", 1); + } + vec_append (cf->current_command, save); + vec_free (save); + } + vec_free (possible_commands); + + break; case UNIX_CLI_PARSE_ACTION_YANK: /* TODO */ break; |