457 lines
9.5 KiB
C
457 lines
9.5 KiB
C
/*-
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* Copyright (c) 2012, 2013 Nathanial Sloss <nathanialsloss@yahoo.com.au>
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* 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
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE 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 <err.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdbool.h>
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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 <unistd.h>
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int lines = 25;
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int cols = 80;
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char *screen;
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char *bgcolor;
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char *fgcolor;
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char *attributes;
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int screensize;
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char ansibuffer[256];
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char *leftover;
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int curpos, newpos, cury, newy, curx, newx;
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int ansiattr, ansiattr_old;
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int bg_color, fg_color, oldbg, oldfg;
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int ansipos;
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char ansicode;
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int ansinum;
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bool csistart;
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bool colorflag;
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void
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writebuffer(void *buf, int count) {
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int fdout = fileno(stdout);
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write(fdout, buf, count);
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return;
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}
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void
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writescreen(void) {
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int newbg, newfg, newattr, m, n, o, p;
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int colorcode_len;
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char colorcode[20];
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char nl = 0x0a;
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char buf[2048];
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int buffercount = 0;
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int buffersize = 2048;
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for (m = 0; m < screensize; m += cols) {
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for (n = 0; n < cols; n++) {
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o = n + m;
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if (colorflag && (attributes[o] != ansiattr_old)) {
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snprintf(colorcode, sizeof(colorcode),
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"\033[m");
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colorcode_len = strlen(colorcode);
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for (p = 0; p < colorcode_len; p++) {
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if (buffercount >= buffersize) {
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writebuffer(buf, buffercount);
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buffercount = 0;
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}
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buf[buffercount] = colorcode[p];
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buffercount++;
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}
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}
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if (colorflag && (bgcolor[o] != oldbg ||
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fgcolor[o] != oldfg || attributes[o]
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!= ansiattr_old || n == 0)) {
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if (attributes[o] == -1)
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newattr = 0;
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else
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newattr = attributes[o];
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if (bgcolor[o] == -1)
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newbg = 49;
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else
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newbg = bgcolor[o];
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if (fgcolor[o] == -1)
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newfg = 39;
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else
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newfg = fgcolor[o];
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snprintf(colorcode, sizeof(colorcode),
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"\033[%d;%d;%dm", newfg, newbg, newattr);
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ansiattr_old = attributes[o];
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oldbg = bgcolor[o];
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oldfg = fgcolor[o];
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colorcode_len = strlen(colorcode);
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for (p = 0; p < colorcode_len; p++) {
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if (buffercount >= buffersize) {
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writebuffer(buf, buffercount);
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buffercount = 0;
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}
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buf[buffercount] = colorcode[p];
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buffercount++;
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}
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}
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if (buffercount >= buffersize) {
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writebuffer(buf, buffercount);
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buffercount = 0;
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}
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buf[buffercount] = screen[o];
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buffercount++;
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}
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if (buffercount >= buffersize) {
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writebuffer(buf, buffercount);
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buffercount = 0;
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}
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buf[buffercount] = nl;
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buffercount++;
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}
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writebuffer(buf, buffercount);
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return;
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}
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void parseansi(void) {
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unsigned int j, k, l;
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/* Strip first two characters esc[ */
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for (j = 0; j < sizeof(ansibuffer); j++) {
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if (j + 2 >= (sizeof(ansibuffer)))
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k = 0;
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else
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k = ansibuffer[j + 2];
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ansibuffer[j] = k;
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}
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ansinum = strtoimax(ansibuffer, &leftover, 10);
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strcpy(ansibuffer, leftover);
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if (ansicode == 'J') {
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writescreen();
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ansiattr = 0;
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bg_color = 49;
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fg_color = 39;
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if (ansinum == 2)
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l = 0;
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else
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l = (cury * cols) + curx - 1;
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for (j = l; j < (unsigned int)screensize; j++) {
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screen[j] = ' ';
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attributes[j] = ansiattr;
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bgcolor[j] = bg_color;
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fgcolor[j] = fg_color;
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}
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}
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if (ansicode == 'A') {
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writescreen();
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if (ansinum == 0)
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cury--;
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else if (ansinum > 0)
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cury -= ansinum;
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if (cury < 1)
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cury = 1;
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}
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if (ansicode == 'B') {
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if (ansinum == 0)
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cury++;
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else if (ansinum > 0)
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cury += ansinum;
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if (cury > lines) {
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writescreen();
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cury = lines;
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}
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}
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if (ansicode == 'C') {
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if (ansinum == 0)
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curx++;
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else if (ansinum > 0)
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curx += ansinum;
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if (curx > cols) {
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writescreen();
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curx = cols;
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}
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}
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if (ansicode == 'D') {
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writescreen();
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if (ansinum == 0)
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curx--;
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else if (ansinum > 0)
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curx -= ansinum;
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if (curx < 1)
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curx = 1;
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}
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if (ansicode == 'E') {
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if (ansinum == 0)
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cury++;
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if (ansinum > 0)
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cury += ansinum;
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curx = 1;
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if (cury > lines) {
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writescreen();
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cury = lines;
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}
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}
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if (ansicode == 'F') {
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writescreen();
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if (ansinum == 0)
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cury--;
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if (ansinum > 0)
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cury -= ansinum;
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curx = 1;
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if (cury < 1)
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cury = 1;
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}
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if (ansicode == 'G') {
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if (ansinum < curx)
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writescreen();
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if (ansinum > 0)
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curx = ansinum;
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if (curx > cols) {
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writescreen();
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curx = cols;
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}
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}
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if (ansicode == 'H' || ansicode == 'f') {
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if (ansinum < 1)
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newy = 1;
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else
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newy = ansinum;
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if (ansibuffer[0] == ';') {
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for (j = 0; j < sizeof(ansibuffer); j++) {
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if (j + 1 >= (sizeof(ansibuffer)))
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k = 0;
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else
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k = ansibuffer[j + 1];
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ansibuffer[j] = k;
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}
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newx = strtoimax(ansibuffer, &leftover, 10);
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if (newx < 1)
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newx = 1;
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}
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if (newx > cols)
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newx = cols;
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if (newy > lines)
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newy = lines;
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if ((newy < cury))
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writescreen();
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curx = newx;
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cury = newy;
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}
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if (ansicode == 'm') {
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if (ansinum >= 0 && ansinum < 30)
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ansiattr = ansinum;
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else if (ansinum >= 30 && ansinum <= 39)
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fg_color = ansinum;
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else if (ansinum >= 40 && ansinum < 49)
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bg_color = ansinum;
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while (ansibuffer[0] == ';') {
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for (j = 0; j < sizeof(ansibuffer); j++) {
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if (j + 1 >= (sizeof(ansibuffer)))
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k = 0;
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else
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k = ansibuffer[j + 1];
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ansibuffer[j] = k;
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}
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ansinum = strtoimax(ansibuffer, &leftover, 10);
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strcpy(ansibuffer, leftover);
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if (ansinum >= 0 && ansinum < 30)
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ansiattr = ansinum;
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else if (ansinum >= 30 && ansinum <= 39)
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fg_color = ansinum;
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else if (ansinum >= 40 && ansinum < 49)
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bg_color = ansinum;
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}
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}
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return;
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}
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int
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main(int argc, char **argv) {
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int ch, nr, readpos;
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int fdin = fileno(stdin);
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char buffer[2048];
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cols = 80;
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lines = 25;
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curpos = newpos = 0;
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cury = newy = 1;
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curx = newx = 1;
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bg_color = fg_color = oldbg = oldfg = -1;
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ansiattr = ansiattr_old = -1;
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colorflag = false; /* Defaults to b&w */
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while ((ch = getopt(argc, argv, "cl:w:")) != -1)
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switch (ch) {
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case 'c':
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colorflag = true;
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break;
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case 'l':
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lines = atoi(optarg); /* lines per screen */
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break;
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case 'w':
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cols = atoi(optarg); /* coloumns per screen */
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break;
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default:
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case '?':
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(void)fprintf(stderr,
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"usage: ansi2text [-c -w [width] -l [lines]] [file]\n");
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exit(EXIT_FAILURE);
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/* NOTREACHED */
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}
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argv += optind;
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if (*argv) {
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if ((fdin = open(*argv, O_RDONLY)) < 0)
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err(1, "Error opening file: %s", *argv);
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}
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screensize = cols * lines;
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if (screensize < 1) {
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fprintf(stderr, "Screensize must be at least 1 x 1.\n");
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return EXIT_FAILURE;
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}
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/* Allocate virtual screen */
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screen = malloc(screensize);
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attributes = malloc(screensize);
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bgcolor = malloc(screensize);
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fgcolor = malloc(screensize);
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/* Initialise virtual screen with spaces */
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memset(screen, ' ', screensize);
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memset(bgcolor, -1, screensize);
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memset(fgcolor, -1, screensize);
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memset(attributes, -1, screensize);
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while ((nr = read(fdin, &buffer, sizeof(buffer))) != -1
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&& nr != 0) {
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for(readpos = 0; readpos < nr; readpos++) {
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if (buffer[readpos] == 0x1b) {
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csistart = true;
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memset(ansibuffer, 0, sizeof(ansibuffer));
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ansipos = 0;
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ansinum = 0;
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ansicode = 0;
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}
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if (csistart) {
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ansibuffer[ansipos] = buffer[readpos];
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if (ansibuffer[ansipos] >= '0' &&
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ansipos > 1 && ansibuffer[1] != '[')
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csistart = false;
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if (ansibuffer[ansipos] >= 'A' &&
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ansipos > 1 && ansibuffer[1] == '[') {
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ansicode = ansibuffer[ansipos];
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} else
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ansicode = 0;
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if (ansicode) {
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parseansi();
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csistart = false;
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ansicode = 0;
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}
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ansipos++;
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} else {
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if (buffer[readpos] == 0x0a) {
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cury++;
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curx = 1;
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}
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if (buffer[readpos] == 0x0d)
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curx = 1;
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if (buffer[readpos] == 0x08) {
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curx--;
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if (curx < 1)
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curx = 1;
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}
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if (curx > cols) {
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cury++;
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curx = 1;
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}
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if (cury > lines) {
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writescreen();
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cury = 1;
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}
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curpos = ((cury - 1) * cols) + curx - 1;
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if (curpos == screensize) {
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cury = curx = 1;
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curpos = 0;
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}
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if (buffer[readpos] >= ' ') {
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if ((fg_color != 39 || bg_color != 49) &&
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ansiattr == 0)
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ansiattr = 22;
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attributes[curpos] = ansiattr;
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bgcolor[curpos] = bg_color;
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fgcolor[curpos] = fg_color;
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screen[curpos] = buffer[readpos];
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curx++;
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}
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}
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}
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}
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writescreen();
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close(fdin);
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/* free virtual screen */
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free(fgcolor);
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free(bgcolor);
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free(attributes);
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free(screen);
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return EXIT_SUCCESS;
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}
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