[coreboot] libpayload readline
Jordan Crouse
jordan.crouse at amd.com
Tue Aug 19 19:39:41 CEST 2008
On 19/08/08 19:27 +0200, Stefan Reinauer wrote:
>
> --
> coresystems GmbH • Brahmsstr. 16 • D-79104 Freiburg i. Br.
> Tel.: +49 761 7668825 • Fax: +49 761 7664613
> Email: info at coresystems.de • http://www.coresystems.de/
> Registergericht: Amtsgericht Freiburg • HRB 7656
> Geschäftsführer: Stefan Reinauer • Ust-IdNr.: DE245674866
>
> * add readline()
> * add fatal()
>
> Signed-off-by: Stefan Reinauer <stepan at coresystems.de>
> Signed-off-by: Patrick Georgi <patrick.georgi at coresystems.de>
Acked-by: Jordan Crouse <jordan.crouse at amd.com>
>
> Index: include/libpayload.h
> ===================================================================
> --- include/libpayload.h (revision 3519)
> +++ include/libpayload.h (working copy)
> @@ -293,5 +293,10 @@
> /* i386/util.S */
> #define abort() halt()
> void halt(void) __attribute__ ((noreturn));
> +void fatal(const char* msg) __attribute__ ((noreturn));
> +
> +/* libc/readline.c */
> +char * readline(const char * prompt);
> +int getline(char *buffer, int len)
>
> #endif
> Index: libc/readline.c
> ===================================================================
> --- libc/readline.c (revision 0)
> +++ libc/readline.c (revision 0)
> @@ -0,0 +1,150 @@
> +/*
> + * This file is part of the libpayload project.
> + *
> + * Copyright (C) 2008 coresystems GmbH
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in the
> + * documentation and/or other materials provided with the distribution.
> + * 3. The name of the author may not be used to endorse or promote products
> + * derived from this software without specific prior written permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> + * SUCH DAMAGE.
> + */
> +
> +#include <libpayload.h>
> +
> +static char * readline_buffer;
> +static int readline_bufferlen;
> +
> +/**
> + * This readline implementation is rather simple, but it does more than the
> + * original readline() because it allows us to have a pre-filled buffer. To
> + * pre-fill the buffer, use the getline() function.
> + */
> +char * readline(const char * prompt)
> +{
> + char *buffer;
> + int current, ch, nonspace_seen;
> +
> + if (!readline_buffer || !readline_bufferlen) {
> +#define READLINE_BUFFERSIZE 256
> + readline_buffer = malloc(READLINE_BUFFERSIZE);
> + readline_bufferlen = READLINE_BUFFERSIZE;
> + memset(readline_buffer, 0, readline_bufferlen);
> + }
> +
> + buffer = readline_buffer;
> +
> + /* print prompt */
> + if (prompt) {
> + current = 0;
> + while (prompt[current]) {
> + putchar(prompt[current]);
> + current++;
> + }
> + }
> +
> + /* print existing buffer, if there is one */
> + current = 0;
> + while (buffer[current]) {
> + putchar(buffer[current]);
> + current++;
> + }
> +
> + while (1) {
> + ch = getchar();
> + switch (ch) {
> + case '\r':
> + case '\n':
> + /* newline */
> + putchar('\n');
> + goto out;
> + case '\b':
> + case '\x7f':
> + /* backspace */
> + if (current > 0) {
> + putchar('\b');
> + putchar(' ');
> + putchar('\b');
> + current--;
> + }
> + break;
> + case 'W' & 0x1f: /* CTRL-W */
> + /* word erase */
> + nonspace_seen = 0;
> + while (current) {
> + if (buffer[current - 1] != ' ')
> + nonspace_seen = 1;
> + putchar('\b');
> + putchar(' ');
> + putchar('\b');
> + current--;
> + if (nonspace_seen && (current < readline_bufferlen - 1)
> + && (current > 0) && (buffer[current - 1] == ' '))
> + break;
> + }
> + break;
> + case 'U' & 0x1f: /* CTRL-U */
> + /* line erase */
> + while (current) {
> + putchar('\b');
> + putchar(' ');
> + putchar('\b');
> + current--;
> + }
> + current = 0;
> + break;
> + default:
> + /* all other characters */
> +
> + /* ignore control characters */
> + if (ch < 0x20)
> + break;
> +
> + /* ignore unprintables */
> + if (ch >= 0x7f)
> + break;
> +
> + if (current + 1 < readline_bufferlen) {
> + /* print new character */
> + putchar(ch);
> + /* and add it to the array */
> + buffer[current] = ch;
> + current++;
> + }
> + }
> + }
> +
> +
> +out:
> + if (current >= readline_bufferlen)
> + current = readline_bufferlen - 1;
> + buffer[current] = '\0';
> +
> + return buffer;
> +}
> +
> +int getline(char *buffer, int len)
> +{
> + readline_buffer = buffer;
> + readline_bufferlen = len;
> + readline(NULL);
> + return strlen(buffer);
> +}
> +
> Index: libc/Makefile.inc
> ===================================================================
> --- libc/Makefile.inc (revision 3519)
> +++ libc/Makefile.inc (working copy)
> @@ -31,3 +31,4 @@
> TARGETS-$(CONFIG_LIBC) += libc/malloc.o libc/printf.o libc/console.o libc/string.o
> TARGETS-$(CONFIG_LIBC) += libc/memory.o libc/ctype.o libc/ipchecksum.o libc/lib.o
> TARGETS-$(CONFIG_LIBC) += libc/rand.o libc/time.o libc/lar.o libc/exec.o
> +TARGETS-$(CONFIG_LIBC) += libc/readline.o
> Index: libc/lib.c
> ===================================================================
> --- libc/lib.c (revision 3519)
> +++ libc/lib.c (working copy)
> @@ -101,3 +101,15 @@
> ('A' <= h && h <= 'F') ? (h - 'A' + 10) : \
> ('a' <= h && h <= 'f') ? (h - 'a' + 10) : 0);
> }
> +
> +/**
> + * Enters HALT state, after printing msg
> + *
> + * @param msg message to print
> + */
> +void fatal(const char *msg)
> +{
> + printf("%s",msg);
> + halt();
> +}
> +
> --
> coreboot mailing list
> coreboot at coreboot.org
> http://www.coreboot.org/mailman/listinfo/coreboot
--
Jordan Crouse
Systems Software Development Engineer
Advanced Micro Devices, Inc.
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