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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/console.h>
  36. #include <io/keycode.h>
  37. #include <io/style.h>
  38. #include <errno.h>
  39. #include <bool.h>
  40.  
  41. #include "config.h"
  42. #include "util.h"
  43. #include "scli.h"
  44. #include "input.h"
  45. #include "errors.h"
  46. #include "exec.h"
  47.  
  48. static void read_line(char *, int);
  49.  
  50. /* Tokenizes input from console, sees if the first word is a built-in, if so
  51.  * invokes the built-in entry point (a[0]) passing all arguments in a[] to
  52.  * the handler */
  53. int tok_input(cliuser_t *usr)
  54. {
  55.     char *cmd[WORD_MAX];
  56.     int n = 0, i = 0;
  57.     int rc = 0;
  58.     char *tmp;
  59.  
  60.     if (NULL == usr->line)
  61.         return CL_EFAIL;
  62.  
  63.     tmp = str_dup(usr->line);
  64.  
  65.     cmd[n] = strtok(tmp, " ");
  66.     while (cmd[n] && n < WORD_MAX) {
  67.         cmd[++n] = strtok(NULL, " ");
  68.     }
  69.  
  70.     /* We have rubbish */
  71.     if (NULL == cmd[0]) {
  72.         rc = CL_ENOENT;
  73.         goto finit;
  74.     }
  75.  
  76.     /* Its a builtin command ? */
  77.     if ((i = (is_builtin(cmd[0]))) > -1) {
  78.         rc = run_builtin(i, cmd, usr);
  79.         goto finit;
  80.     /* Its a module ? */
  81.     } else if ((i = (is_module(cmd[0]))) > -1) {
  82.         rc = run_module(i, cmd);
  83.         goto finit;
  84.     }
  85.  
  86.     /* See what try_exec thinks of it */
  87.     rc = try_exec(cmd[0], cmd);
  88.  
  89. finit:
  90.     if (NULL != usr->line) {
  91.         free(usr->line);
  92.         usr->line = (char *) NULL;
  93.     }
  94.     if (NULL != tmp)
  95.         free(tmp);
  96.  
  97.     return rc;
  98. }
  99.  
  100. static void read_line(char *buffer, int n)
  101. {
  102.     console_event_t ev;
  103.     size_t offs, otmp;
  104.     wchar_t dec;
  105.  
  106.     offs = 0;
  107.     while (true) {
  108.         fflush(stdout);
  109.         if (!console_get_event(fphone(stdin), &ev))
  110.             return;
  111.        
  112.         if (ev.type != KEY_PRESS)
  113.             continue;
  114.        
  115.         if (ev.key == KC_ENTER || ev.key == KC_NENTER)
  116.             break;
  117.         if (ev.key == KC_BACKSPACE) {
  118.             if (offs > 0) {
  119.                 /*
  120.                  * Back up until we reach valid start of
  121.                  * character.
  122.                  */
  123.                 while (offs > 0) {
  124.                     --offs; otmp = offs;
  125.                     dec = str_decode(buffer, &otmp, n);
  126.                     if (dec != U_SPECIAL)
  127.                         break;
  128.                 }
  129.                 putchar('\b');
  130.             }
  131.             continue;
  132.         }
  133.         if (ev.c >= ' ') {
  134.             if (chr_encode(ev.c, buffer, &offs, n - 1) == EOK)
  135.                 putchar(ev.c);
  136.         }
  137.     }
  138.     putchar('\n');
  139.     buffer[offs] = '\0';
  140. }
  141.  
  142. /* TODO:
  143.  * Implement something like editline() / readline(), if even
  144.  * just for command history and making arrows work. */
  145. void get_input(cliuser_t *usr)
  146. {
  147.     char line[INPUT_MAX];
  148.  
  149.     console_set_style(fphone(stdout), STYLE_EMPHASIS);
  150.     printf("%s", usr->prompt);
  151.     console_set_style(fphone(stdout), STYLE_NORMAL);
  152.  
  153.     read_line(line, INPUT_MAX);
  154.     /* Make sure we don't have rubbish or a C/R happy user */
  155.     if (str_cmp(line, "") == 0 || str_cmp(line, "\n") == 0)
  156.         return;
  157.     usr->line = str_dup(line);
  158.  
  159.     return;
  160. }
  161.  
  162.