* add readline()
* add fatal() Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de> Acked-by: Jordan Crouse <jordan.crouse@amd.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3523 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
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Stefan Reinauer
Stefan Reinauer
parent
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addf443e12
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/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 coresystems GmbH
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload.h>
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static char * readline_buffer;
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static int readline_bufferlen;
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/**
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* This readline implementation is rather simple, but it does more than the
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* original readline() because it allows us to have a pre-filled buffer. To
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* pre-fill the buffer, use the getline() function.
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*/
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char * readline(const char * prompt)
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{
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char *buffer;
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int current, ch, nonspace_seen;
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if (!readline_buffer || !readline_bufferlen) {
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#define READLINE_BUFFERSIZE 256
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readline_buffer = malloc(READLINE_BUFFERSIZE);
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readline_bufferlen = READLINE_BUFFERSIZE;
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memset(readline_buffer, 0, readline_bufferlen);
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}
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buffer = readline_buffer;
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/* print prompt */
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if (prompt) {
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current = 0;
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while (prompt[current]) {
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putchar(prompt[current]);
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current++;
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}
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}
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/* print existing buffer, if there is one */
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current = 0;
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while (buffer[current]) {
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putchar(buffer[current]);
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current++;
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}
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while (1) {
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ch = getchar();
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switch (ch) {
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case '\r':
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case '\n':
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/* newline */
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putchar('\n');
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goto out;
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case '\b':
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case '\x7f':
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/* backspace */
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if (current > 0) {
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putchar('\b');
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putchar(' ');
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putchar('\b');
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current--;
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}
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break;
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case 'W' & 0x1f: /* CTRL-W */
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/* word erase */
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nonspace_seen = 0;
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while (current) {
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if (buffer[current - 1] != ' ')
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nonspace_seen = 1;
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putchar('\b');
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putchar(' ');
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putchar('\b');
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current--;
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if (nonspace_seen && (current < readline_bufferlen - 1)
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&& (current > 0) && (buffer[current - 1] == ' '))
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break;
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}
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break;
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case 'U' & 0x1f: /* CTRL-U */
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/* line erase */
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while (current) {
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putchar('\b');
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putchar(' ');
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putchar('\b');
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current--;
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}
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current = 0;
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break;
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default:
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/* all other characters */
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/* ignore control characters */
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if (ch < 0x20)
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break;
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/* ignore unprintables */
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if (ch >= 0x7f)
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break;
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if (current + 1 < readline_bufferlen) {
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/* print new character */
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putchar(ch);
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/* and add it to the array */
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buffer[current] = ch;
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current++;
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}
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}
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}
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out:
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if (current >= readline_bufferlen)
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current = readline_bufferlen - 1;
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buffer[current] = '\0';
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return buffer;
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}
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int getline(char *buffer, int len)
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{
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readline_buffer = buffer;
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readline_bufferlen = len;
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readline(NULL);
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return strlen(buffer);
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}
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