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3265 post 1 
/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
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 * All rights reserved.
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 * Copyright (c) 2008, Jiri Svoboda - All Rights Reserved
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * Redistributions of source code must retain the above copyright notice, this
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 * list of conditions and the following disclaimer.
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 *
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 * Redistributions in binary form must reproduce the above copyright notice,
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 * this list of conditions and the following disclaimer in the documentation
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 * and/or other materials provided with the distribution.
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 *
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 * Neither the name of the original program's authors nor the names of its
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 * contributors may be used to endorse or promote products derived from this
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 * software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <io/stream.h>
4153 mejdrech 36 
#include <console.h>
4263 mejdrech 37 
#include <kbd/kbd.h>
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#include <kbd/keycode.h>
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#include <errno.h>
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#include <bool.h>
3265 post 41 
 
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#include "config.h"
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#include "util.h"
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#include "scli.h"
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#include "input.h"
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#include "errors.h"
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#include "exec.h"
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3372 post 49 
static void read_line(char *, int);
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3265 post 51 
/* Tokenizes input from console, sees if the first word is a built-in, if so
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 * invokes the built-in entry point (a[0]) passing all arguments in a[] to
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 * the handler */
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int tok_input(cliuser_t *usr)
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{
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    char *cmd[WORD_MAX];
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    int n = 0, i = 0;
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    int rc = 0;
3269 post 59 
    char *tmp;
3265 post 60 
 
3269 post 61 
    if (NULL == usr->line)
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        return CL_EFAIL;
3265 post 63 
 
4153 mejdrech 64 
    tmp = strdup(usr->line);
3275 post 65 
 
4153 mejdrech 66 
    cmd[n] = strtok(tmp, " ");
3265 post 67 
    while (cmd[n] && n < WORD_MAX) {
4153 mejdrech 68 
        cmd[++n] = strtok(NULL, " ");
3265 post 69 
    }
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    /* We have rubbish */
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    if (NULL == cmd[0]) {
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        rc = CL_ENOENT;
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        goto finit;
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    }
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4153 mejdrech 77 
    /* Its a builtin command ? */
3265 post 78 
    if ((i = (is_builtin(cmd[0]))) > -1) {
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        rc = run_builtin(i, cmd, usr);
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        goto finit;
4153 mejdrech 81 
    /* Its a module ? */
3265 post 82 
    } else if ((i = (is_module(cmd[0]))) > -1) {
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        rc = run_module(i, cmd);
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        goto finit;
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    }
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4153 mejdrech 87 
    /* See what try_exec thinks of it */
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    rc = try_exec(cmd[0], cmd);
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3265 post 90 
finit:
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    if (NULL != usr->line) {
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        free(usr->line);
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        usr->line = (char *) NULL;
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    }
3268 post 95 
    if (NULL != tmp)
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        free(tmp);
3275 post 97 
 
3265 post 98 
    return rc;
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}
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3372 post 101 
static void read_line(char *buffer, int n)
3265 post 102 
{
4263 mejdrech 103 
    kbd_event_t ev;
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    size_t offs, otmp;
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    wchar_t dec;
3265 post 106 
 
4263 mejdrech 107 
    offs = 0;
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    while (true) {
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        fflush(stdout);
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        if (kbd_get_event(&ev) < 0)
3265 post 111 
            return;
4263 mejdrech 112 
        if (ev.type == KE_RELEASE)
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            continue;
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        if (ev.key == KC_ENTER || ev.key == KC_NENTER)
3265 post 116 
            break;
4263 mejdrech 117 
        if (ev.key == KC_BACKSPACE) {
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            if (offs > 0) {
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                /*
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                 * Back up until we reach valid start of
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                 * character.
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                 */
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                while (offs > 0) {
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                    --offs; otmp = offs;
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                    dec = str_decode(buffer, &otmp, n);
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                    if (dec != U_SPECIAL)
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                        break;
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                }
3265 post 129 
                putchar('\b');
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            }
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            continue;
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        }
4263 mejdrech 133 
        if (ev.c >= ' ') {
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            //putchar(ev.c);
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            if (chr_encode(ev.c, buffer, &offs, n - 1) == EOK)
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                console_putchar(ev.c);
4153 mejdrech 137 
        }
3265 post 138 
    }
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    putchar('\n');
4263 mejdrech 140 
    buffer[offs] = '\0';
3265 post 141 
}
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3372 post 143 
/* TODO:
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 * Implement something like editline() / readline(), if even
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 * just for command history and making arrows work. */
3265 post 146 
void get_input(cliuser_t *usr)
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{
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    char line[INPUT_MAX];
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    size_t len = 0;
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4153 mejdrech 151 
    console_set_style(STYLE_EMPHASIS);
3265 post 152 
    printf("%s", usr->prompt);
4153 mejdrech 153 
    console_set_style(STYLE_NORMAL);
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3265 post 155 
    read_line(line, INPUT_MAX);
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    len = strlen(line);
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    /* Make sure we don't have rubbish or a C/R happy user */
3275 post 158 
    if (len == 0 || line[0] == '\n')
3265 post 159 
        return;
4153 mejdrech 160 
    usr->line = strdup(line);
3304 post 161 
 
3265 post 162 
    return;
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}
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