README and copy of NetBSD packaging request with source.

2020-12-14 18:44:43 -05:00 · 2020-12-14 18:44:43 -05:00 · 1e9c8a68fc
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+A program to strip ansi codes from text files.
+
+Looks to have only appeared in a NetBSD packaging request, problem report 48092.
+See netbsd_gnat_pkging_request.origin which was saved from
+https://gnats.netbsd.org/48092
+
--- a/netbsd_gnat_pkging_request.origin
+++ b/netbsd_gnat_pkging_request.origin
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+
+  NetBSD Problem Report #48092
+
+From www@NetBSD.org  Sun Jul 28 13:39:50 2013
+Return-Path: <www@NetBSD.org>
+Received: from mail.netbsd.org (mail.netbsd.org [149.20.53.66])
+	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
+	(Client CN "mail.NetBSD.org", Issuer "Postmaster NetBSD.org" (verified OK))
+	by mollari.NetBSD.org (Postfix) with ESMTPS id CF007705DA
+	for <gnats-bugs@gnats.NetBSD.org>; Sun, 28 Jul 2013 13:39:50 +0000 (UTC)
+Message-Id: <20130728133948.90B4D70D0A@mollari.NetBSD.org>
+Date: Sun, 28 Jul 2013 13:39:48 +0000 (UTC)
+From: nathanialsloss@yahoo.com.au
+Reply-To: nathanialsloss@yahoo.com.au
+To: gnats-bugs@NetBSD.org
+Subject: ansi2text a utility for formatting text with ANSI sequences for display with less.
+X-Send-Pr-Version: www-1.0
+
+*>Number:*         48092
+*>Category:*       bin
+*>Synopsis:*       ansi2text a utility for formatting text with ANSI sequences for display with less.
+*>Confidential:*   no
+*>Severity:*       non-critical
+*>Priority:*       medium
+*>Responsible:*    bin-bug-people
+*>State:*          open
+*>Class:*          change-request
+*>Submitter-Id:*   net
+*>Arrival-Date:*   Sun Jul 28 13:40:00 +0000 2013
+*>Originator:*     Nat Sloss
+*>Release:*        NetBSD 5.0.1
+*>Organization:*
+*>Environment:*
+NetBSD beast 5.0.1 NetBSD 5.0.1 (LOCKDEBUG) #4: Wed Jul 17 22:24:41 EST 2013  build@beast:/home/build/NetBSD-5.0.1_source_tree/usr/src/sys/arch/i386/compile/obj/LOCKDEBUG i386
+*>Description:*
+Consider the following:
+
+tip myconnection | tee myconnection.log
+Assume that my connection sends ANSI cursor and colour sequences.
+
+Try to display myconnection.log with less or open with a text editor
+less myconnection.log
+
+You will find the display illegible ansi2text is my attempt at rectifying this.
+*>How-To-Repeat:*
+Refer to Description.
+*>Fix:*
+To use:
+
+cat myconnection.log | ansi2text | less
+
+ansi2text.c
+/*-
+ * Copyright (c) 2012, 2013 Nathanial Sloss <nathanialsloss@yahoo.com.au>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int lines = 25;
+int cols = 80;
+
+char *screen;
+char *bgcolor;
+char *fgcolor;
+char *attributes;
+int screensize;
+
+char ansibuffer[256];
+char *leftover;
+
+int curpos, newpos, cury, newy, curx, newx;
+int ansiattr, ansiattr_old;
+int bg_color, fg_color, oldbg, oldfg;
+
+int ansipos;
+char ansicode;
+int ansinum;
+bool csistart;
+
+bool colorflag;
+
+void
+writebuffer(void *buf, int count) {
+	int fdout = fileno(stdout);
+
+	write(fdout, buf, count);
+
+	return;
+}
+
+void
+writescreen(void) {
+	int newbg, newfg, newattr, m, n, o, p;
+	int colorcode_len;
+	char colorcode[20];
+	char nl = 0x0a;
+	char buf[2048];
+	int buffercount = 0;
+	int buffersize = 2048;
+
+	for (m = 0; m < screensize; m += cols) {
+		for (n = 0; n < cols; n++) {
+			o = n + m;
+
+			if (colorflag && (attributes[o] != ansiattr_old)) {
+
+				snprintf(colorcode, sizeof(colorcode),
+				    "\033[m");
+
+				colorcode_len = strlen(colorcode);
+				for (p = 0; p < colorcode_len; p++) {
+					if (buffercount >= buffersize) {
+						writebuffer(buf, buffercount);
+						buffercount = 0;
+					}
+					buf[buffercount] = colorcode[p];
+					buffercount++;
+				}
+			}
+
+			if (colorflag && (bgcolor[o] != oldbg ||
+			    fgcolor[o] != oldfg || attributes[o]
+			    != ansiattr_old || n == 0)) {
+				if (attributes[o] == -1)
+					newattr = 0;
+				else
+					newattr = attributes[o];
+
+				if (bgcolor[o] == -1)
+					newbg = 49;
+				else
+					newbg = bgcolor[o];
+
+				if (fgcolor[o] == -1)
+					newfg = 39;
+				else
+					newfg = fgcolor[o];
+
+				snprintf(colorcode, sizeof(colorcode),
+				    "\033[%d;%d;%dm", newfg, newbg, newattr);
+
+				ansiattr_old = attributes[o];
+				oldbg = bgcolor[o];
+				oldfg = fgcolor[o];
+
+				colorcode_len = strlen(colorcode);
+				for (p = 0; p < colorcode_len; p++) {
+					if (buffercount >= buffersize) {
+						writebuffer(buf, buffercount);
+						buffercount = 0;
+					}
+					buf[buffercount] = colorcode[p];
+					buffercount++;
+				}
+			}
+
+			if (buffercount >= buffersize) {
+				writebuffer(buf, buffercount);
+				buffercount = 0;
+			}
+			buf[buffercount] = screen[o];
+			buffercount++;
+		}
+		if (buffercount >= buffersize) {
+			writebuffer(buf, buffercount);
+			buffercount = 0;
+		}
+		buf[buffercount] = nl;
+		buffercount++;
+	}
+	writebuffer(buf, buffercount);
+
+	return;
+}
+void parseansi(void) {
+	unsigned int j, k, l;
+	/* Strip first two characters esc[ */
+	for (j = 0; j < sizeof(ansibuffer); j++) {
+		if (j + 2 >= (sizeof(ansibuffer)))
+			k = 0;
+		else
+			k = ansibuffer[j + 2];
+		ansibuffer[j] = k;
+	}
+	ansinum = strtoimax(ansibuffer, &leftover, 10);
+	strcpy(ansibuffer, leftover);
+
+	if (ansicode == 'J') {
+		writescreen();
+
+		ansiattr = 0;
+		bg_color = 49;
+		fg_color = 39;
+
+		if (ansinum == 2)
+			l = 0;
+		else
+			l = (cury * cols) + curx - 1;
+		for (j = l; j < (unsigned int)screensize; j++) {
+			screen[j] = ' ';
+			attributes[j] = ansiattr;
+			bgcolor[j] = bg_color;
+			fgcolor[j] = fg_color;
+		}
+	}
+	if (ansicode == 'A') {
+		writescreen();
+		if (ansinum == 0)
+			cury--;
+		else if (ansinum > 0)
+			cury -= ansinum;
+		if (cury < 1)
+			cury = 1;
+	}
+	if (ansicode == 'B') {
+		if (ansinum == 0)
+			cury++;
+		else if (ansinum > 0)
+			cury += ansinum;
+		if (cury > lines) {
+			writescreen();
+			cury = lines;
+		}
+	}
+	if (ansicode == 'C') {
+		if (ansinum == 0)
+			curx++;
+		else if (ansinum > 0)
+			curx += ansinum;
+		if (curx > cols) {
+			writescreen();
+			curx = cols;
+		}
+	}
+	if (ansicode == 'D') {
+		writescreen();
+		if (ansinum == 0)
+			curx--;
+		else if (ansinum > 0)
+			curx -= ansinum;
+		if (curx < 1)
+			curx = 1;
+	}
+	if (ansicode == 'E') {
+		if (ansinum == 0)
+			cury++;
+		if (ansinum > 0)
+			cury += ansinum;
+		curx = 1;
+		if (cury > lines) {
+			writescreen();
+			cury = lines;
+		}
+	}
+	if (ansicode == 'F') {
+		writescreen();
+		if (ansinum == 0)
+			cury--;
+		if (ansinum > 0)
+			cury -= ansinum;
+		curx = 1;
+		if (cury < 1)
+			cury = 1;
+	}
+	if (ansicode == 'G') {
+		if (ansinum < curx)
+			writescreen();
+		if (ansinum > 0)
+			curx = ansinum;
+		if (curx > cols) {
+			writescreen();
+			curx = cols;
+		}
+	}
+	if (ansicode == 'H' || ansicode == 'f') {
+		if (ansinum < 1)
+			newy = 1;
+		else
+			newy = ansinum;
+
+		if (ansibuffer[0] == ';') {
+			for (j = 0; j < sizeof(ansibuffer); j++) {
+				if (j + 1 >= (sizeof(ansibuffer)))
+					k = 0;
+				else
+					k = ansibuffer[j + 1];
+				ansibuffer[j] = k;
+			}
+			newx = strtoimax(ansibuffer, &leftover, 10);
+			if (newx < 1)
+				newx = 1;
+		}
+
+		if (newx > cols)
+			newx = cols;
+		if (newy > lines)
+			newy = lines;
+
+		if ((newy < cury)) 
+			writescreen();
+		curx = newx;
+		cury = newy;
+	}
+	if (ansicode == 'm') {
+		if (ansinum >= 0 && ansinum < 30)
+			ansiattr = ansinum;
+		else if (ansinum >= 30 && ansinum <= 39)
+			fg_color = ansinum;
+		else if (ansinum >= 40 && ansinum < 49)
+			bg_color = ansinum;
+
+		while (ansibuffer[0] == ';') {
+			for (j = 0; j < sizeof(ansibuffer); j++) {
+				if (j + 1 >= (sizeof(ansibuffer)))
+					k = 0;
+				else
+					k = ansibuffer[j + 1];
+				ansibuffer[j] = k;
+			}
+			ansinum = strtoimax(ansibuffer, &leftover, 10);
+			strcpy(ansibuffer, leftover);
+
+			if (ansinum >= 0 && ansinum < 30)
+				ansiattr = ansinum;
+			else if (ansinum >= 30 && ansinum <= 39)
+				fg_color = ansinum;
+			else if (ansinum >= 40 && ansinum < 49)
+				bg_color = ansinum;
+		}
+	}
+
+	return;
+}
+
+int
+main(int argc, char **argv) {
+	int ch, nr, readpos;
+	int fdin = fileno(stdin);
+	char buffer[2048];
+
+	cols = 80;
+	lines = 25;
+
+	curpos = newpos = 0;
+	cury = newy = 1;
+	curx = newx = 1;
+	bg_color = fg_color = oldbg = oldfg = -1;
+	ansiattr = ansiattr_old = -1;
+
+	colorflag = false;			/* Defaults to b&w */
+
+	while ((ch = getopt(argc, argv, "cl:w:")) != -1)
+		switch (ch) {
+		case 'c':
+			colorflag = true;
+			break;
+		case 'l':
+			lines = atoi(optarg);	/* lines per screen */
+			break;
+		case 'w':
+			cols = atoi(optarg);	/* coloumns per screen */
+			break;
+		default:
+		case '?':
+			(void)fprintf(stderr,
+			    "usage: ansi2text [-c -w [width] -l [lines]] [file]\n");
+			exit(EXIT_FAILURE);
+			/* NOTREACHED */
+		}
+	argv += optind;
+
+	if (*argv) {
+		if ((fdin = open(*argv, O_RDONLY)) < 0)
+			err("Error opening file: %s", *argv);
+	}
+
+	screensize = cols * lines;
+	if (screensize < 1) {
+		fprintf(stderr, "Screensize must be at least 1 x 1.\n");
+
+		return EXIT_FAILURE;
+	}
+
+	/* Allocate virtual screen */
+	screen = malloc(screensize);
+	attributes = malloc(screensize);
+	bgcolor = malloc(screensize);
+	fgcolor = malloc(screensize);
+
+	/* Initialise virtual screen with spaces */
+	memset(screen, ' ', screensize);
+	memset(bgcolor, -1, screensize);
+	memset(fgcolor, -1, screensize);
+	memset(attributes, -1, screensize);
+
+	while ((nr = read(fdin, &buffer, sizeof(buffer))) != -1 
+	    && nr != 0) {
+		for(readpos = 0; readpos < nr; readpos++) {
+
+			if (buffer[readpos] == 0x1b) {
+				csistart = true;
+				memset(ansibuffer, 0, sizeof(ansibuffer));
+				ansipos = 0;
+				ansinum = 0;
+				ansicode = 0;
+			}
+			if (csistart) {
+				ansibuffer[ansipos] = buffer[readpos];
+
+				if (ansibuffer[ansipos] >= '0' &&
+				    ansipos > 1 && ansibuffer[1] != '[')
+					csistart = false;
+
+				if (ansibuffer[ansipos] >= 'A' &&
+				    ansipos > 1 && ansibuffer[1] == '[') {
+					ansicode = ansibuffer[ansipos];
+				} else
+					ansicode = 0;
+				if (ansicode) {
+					parseansi();
+					csistart = false;
+					ansicode = 0;
+				}
+				ansipos++;
+			} else {
+				if (buffer[readpos] == 0x0a) {
+					cury++;
+					curx = 1;
+				}
+				if (buffer[readpos] == 0x0d)
+					curx = 1;
+				if (buffer[readpos] == 0x08) {
+					curx--;
+					if (curx < 1)
+						curx = 1;
+				}
+
+				if (curx > cols) {
+					cury++;
+					curx = 1;
+				}
+				if (cury > lines) {
+					writescreen();
+					cury = 1;
+				}
+
+				curpos = ((cury - 1) * cols) + curx - 1;
+				if (curpos == screensize) {
+					cury = curx = 1;
+					curpos = 0;
+				}
+
+				if (buffer[readpos] >= ' ') {
+					if ((fg_color != 39 || bg_color != 49) &&
+					    ansiattr == 0)
+						ansiattr = 22;
+
+					attributes[curpos] = ansiattr;
+					bgcolor[curpos] = bg_color;
+					fgcolor[curpos] = fg_color;
+					screen[curpos] = buffer[readpos];
+					curx++;
+				}
+			}
+		}
+	}
+	writescreen();
+
+	close(fdin);
+
+	/* free virtual screen */
+	free(fgcolor);
+	free(bgcolor);
+	free(attributes);
+	free(screen);
+
+	return EXIT_SUCCESS;
+}
+ansi2text.1
+.\"	$NetBSD: colorbars.6,v 1.3 2012/06/09 23:15:13 njoly Exp $
+.\"
+.\" Copyright (c) 2012, 2013 Nathanial Sloss <nathanialsloss@yahoo.com.au>
+.\" All rights reserved.
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd July 28, 2013
+.Dt ANSI2TEXT 1
+.Os
+.Sh NAME
+.Nm ansi2text
+.Nd formats ANSI text files or standard input for display
+.Sh SYNOPSIS
+.Nm
+.Op Fl c
+.Op Fl w Ar width
+.Op Fl l Ar length
+.Op Ar file
+.Sh DESCRIPTION
+The
+.Nm
+command formats ANSI text for display 
+.Bl -tag -width Ds
+.It Fl c
+Display formatted text in color suitable for display with less -R
+.It Fl w Ar width
+Display formatted text in with a maximum
+.Ar width
+in coloumns.  Defaults to 80 coloumns.
+.It Fl l Ar length
+Display formatted text in with a maximum
+.Ar length
+(height) in rows.  Defaults to 25 rows.
+.It Ar file
+File to display, if not specified standard input is used.
+.Sh SEE ALSO
+.Xr less 1
+.Sh HISTORY
+.Nm
+appeared in
+.Nx 7.0 .
+.Sh AUTHORS
+Nathanial Sloss
+
+
+I hope this is useful.
+
+Regards,
+
+Nat
+
+------------------------------------------------------------------------
+<https://www.netbsd.org/> 	NetBSD Home <https://www.netbsd.org/>
+
+	
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+Search <https://www.netbsd.org/support/query-pr.html>
+
+------------------------------------------------------------------------
+(Contact us) <https://www.netbsd.org/cgi-bin/feedback.cgi> $NetBSD:
+query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
+$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
+Copyright © 1994-2007 The NetBSD Foundation, Inc. ALL RIGHTS RESERVED.
+<https://www.netbsd.org/about/disclaimer.html>
+