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  1. /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
  2.  * All rights reserved.
  3.  * Copyright (c) 2008, Jiri Svoboda - All Rights Reserved
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions are met:
  7.  *
  8.  * Redistributions of source code must retain the above copyright notice, this
  9.  * list of conditions and the following disclaimer.
  10.  *
  11.  * Redistributions in binary form must reproduce the above copyright notice,
  12.  * this list of conditions and the following disclaimer in the documentation
  13.  * and/or other materials provided with the distribution.
  14.  *
  15.  * Neither the name of the original program's authors nor the names of its
  16.  * contributors may be used to endorse or promote products derived from this
  17.  * software without specific prior written permission.
  18.  *
  19.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22.  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29.  * POSSIBILITY OF SUCH DAMAGE.
  30.  */
  31.  
  32. #include <stdio.h>
  33. #include <stdlib.h>
  34. #include <string.h>
  35. #include <io/stream.h>
  36. #include <console.h>
  37. #include <kbd/kbd.h>
  38. #include <kbd/keycode.h>
  39.  
  40. #include "config.h"
  41. #include "util.h"
  42. #include "scli.h"
  43. #include "input.h"
  44. #include "errors.h"
  45. #include "exec.h"
  46.  
  47. static void read_line(char *, int);
  48.  
  49. /* Tokenizes input from console, sees if the first word is a built-in, if so
  50.  * invokes the built-in entry point (a[0]) passing all arguments in a[] to
  51.  * the handler */
  52. int tok_input(cliuser_t *usr)
  53. {
  54.     char *cmd[WORD_MAX];
  55.     int n = 0, i = 0;
  56.     int rc = 0;
  57.     char *tmp;
  58.  
  59.     if (NULL == usr->line)
  60.         return CL_EFAIL;
  61.  
  62.     tmp = strdup(usr->line);
  63.  
  64.     cmd[n] = strtok(tmp, " ");
  65.     while (cmd[n] && n < WORD_MAX) {
  66.         cmd[++n] = strtok(NULL, " ");
  67.     }
  68.  
  69.     /* We have rubbish */
  70.     if (NULL == cmd[0]) {
  71.         rc = CL_ENOENT;
  72.         goto finit;
  73.     }
  74.  
  75.     /* Its a builtin command ? */
  76.     if ((i = (is_builtin(cmd[0]))) > -1) {
  77.         rc = run_builtin(i, cmd, usr);
  78.         goto finit;
  79.     /* Its a module ? */
  80.     } else if ((i = (is_module(cmd[0]))) > -1) {
  81.         rc = run_module(i, cmd);
  82.         goto finit;
  83.     }
  84.  
  85.     /* See what try_exec thinks of it */
  86.     rc = try_exec(cmd[0], cmd);
  87.  
  88. finit:
  89.     if (NULL != usr->line) {
  90.         free(usr->line);
  91.         usr->line = (char *) NULL;
  92.     }
  93.     if (NULL != tmp)
  94.         free(tmp);
  95.  
  96.     return rc;
  97. }
  98.  
  99. static void read_line(char *buffer, int n)
  100. {
  101.     kbd_event_t ev;
  102.     int chars;
  103.  
  104.     chars = 0;
  105.     while (chars < n - 1) {
  106.         fflush(stdout);
  107.         if (kbd_get_event(&ev) < 0)
  108.             return;
  109.         if (ev.type == KE_RELEASE)
  110.             continue;
  111.  
  112.         if (ev.key == KC_ENTER || ev.key == KC_NENTER)
  113.             break;
  114.         if (ev.key == KC_BACKSPACE) {
  115.             if (chars > 0) {
  116.                 putchar('\b');
  117.                 --chars;
  118.             }
  119.             continue;
  120.         }
  121.         if (ev.c >= ' ') {
  122.             //putchar(ev.c);
  123.             console_putchar(ev.c);
  124.             buffer[chars++] = ev.c;
  125.         }
  126.     }
  127.     putchar('\n');
  128.     buffer[chars] = '\0';
  129. }
  130.  
  131. /* TODO:
  132.  * Implement something like editline() / readline(), if even
  133.  * just for command history and making arrows work. */
  134. void get_input(cliuser_t *usr)
  135. {
  136.     char line[INPUT_MAX];
  137.     size_t len = 0;
  138.  
  139.     console_set_style(STYLE_EMPHASIS);
  140.     printf("%s", usr->prompt);
  141.     console_set_style(STYLE_NORMAL);
  142.  
  143.     read_line(line, INPUT_MAX);
  144.     len = strlen(line);
  145.     /* Make sure we don't have rubbish or a C/R happy user */
  146.     if (len == 0 || line[0] == '\n')
  147.         return;
  148.     usr->line = strdup(line);
  149.  
  150.     return;
  151. }
  152.  
  153.