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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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dsp/tty/setbgfg16.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "dsp/tty/itoa8.h"
#include "dsp/tty/quant.h"
#include "libc/limits.h"
static char *ansitoa(char *p, unsigned xt, unsigned base) {
if (xt >= 8) xt -= 8, base += 60;
return itoa8(p, xt + base);
}
static char *setansibgfg(char *p, unsigned bg, unsigned fg) {
*p++ = '\e';
*p++ = '[';
if (bg != -1u) p = ansitoa(p, bg, 40);
if (bg != -1u && fg != -1u) *p++ = ';';
if (fg != -1u) p = ansitoa(p, fg, 30);
*p++ = 'm';
return p;
}
char *setbg16_(char *p, struct TtyRgb bg) { return setansibgfg(p, bg.xt, -1u); }
char *setfg16_(char *p, struct TtyRgb fg) { return setansibgfg(p, -1u, fg.xt); }
char *setbgfg16_(char *p, struct TtyRgb bg, struct TtyRgb fg) {
return setansibgfg(p, bg.xt, fg.xt);
}