author | Tero Marttila <terom@fixme.fi> |
Mon, 04 May 2009 20:55:04 +0300 | |
branch | new-transport |
changeset 168 | a58ad50911fc |
parent 137 | c607c357c486 |
child 170 | 1b2f28e26eef |
permissions | -rw-r--r-- |
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#include "console.h" |
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#include "log.h" |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <readline/readline.h> |
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#include <readline/history.h> |
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#include <assert.h> |
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/** The global console state */ |
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static struct console _console; |
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/** |
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* Our stdin input handler |
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*/ |
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static void console_input (int fd, short what, void *arg) |
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{ |
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struct console *console = arg; |
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(void) fd; |
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(void) what; |
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// update state |
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console->have_input = true; |
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// tell readline to process it |
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rl_callback_read_char(); |
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} |
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/** |
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* Our readline line handler |
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*/ |
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static void console_line (char *line) |
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{ |
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struct console *console = &_console; |
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// XXX: line == NULL -> EOF? |
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// update state |
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console->have_input = false; |
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// invoke the console callback |
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if (console->callbacks && console->callbacks->on_line) |
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console->callbacks->on_line(line, console->cb_arg); |
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// add to history mechanism |
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add_history(line); |
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// release the line |
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free(line); |
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// update state, as the prompt will be displayed again |
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console->have_input = true; |
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} |
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err_t console_init (struct console **console_ptr, struct event_base *ev_base, const struct console_config *config, |
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const struct console_callbacks *callbacks, void *cb_arg, struct error_info *err) |
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{ |
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struct console *console = &_console; |
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// check it's not already initialized |
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assert(!console->initialized); |
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// store callbacks? |
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if (callbacks) |
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console_set_callbacks(console, callbacks, cb_arg); |
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// setup the input event |
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if ((console->ev = event_new(ev_base, STDIN_FILENO, EV_READ | EV_PERSIST, &console_input, console)) == NULL) |
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JUMP_SET_ERROR(err, ERR_EVENT_NEW); |
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// setup readline |
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rl_callback_handler_install(config->prompt, &console_line); |
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// mark it as initialized |
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console->initialized = true; |
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// enable input |
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if (event_add(console->ev, NULL)) |
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JUMP_SET_ERROR(err, ERR_EVENT_ADD); |
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// ok |
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*console_ptr = console; |
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return SUCCESS; |
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error: |
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console_destroy(console); |
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return ERROR_CODE(err); |
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} |
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void console_set_callbacks (struct console *console, const struct console_callbacks *callbacks, void *cb_arg) |
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{ |
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console->callbacks = callbacks; |
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console->cb_arg = cb_arg; |
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} |
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err_t console_print (struct console *console, const char *line) |
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{ |
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if (console->have_input) |
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// don't interrupt current input line |
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rl_crlf(); |
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// output the line |
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if (printf("%s\n", line) < 0) |
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return _ERR_GENERAL; |
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if (console->have_input) { |
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// restore input |
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rl_on_new_line(); |
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rl_redisplay(); |
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} |
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// ok |
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return SUCCESS; |
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} |
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/** |
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* Our log_output_func implementation |
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*/ |
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static void console_log_output_func (const char *line, void *_console) |
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{ |
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struct console *console = _console; |
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console_print(console, line); |
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} |
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void console_set_log_output (struct console *console) |
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{ |
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// replace old one |
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log_set_func(console_log_output_func, console); |
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|
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// mark |
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console->log_output = true; |
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} |
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void console_destroy (struct console *console) |
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{ |
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if (console->log_output) |
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// unset ourselves as the log handler |
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log_set_func(NULL, NULL); |
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// remove the input event |
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if (console->ev) |
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event_free(console->ev); |
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console->ev = NULL; |
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// de-init rl? |
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if (console->initialized) |
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rl_callback_handler_remove(); |
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console->initialized = false; |
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// remove stored stuff |
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console->callbacks = console->cb_arg = NULL; |
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} |
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