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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/quant.h"
#include "libc/calls/calls.h"
#include "libc/log/check.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/ex.h"
#include "libc/sysv/consts/exit.h"
#include "libc/sysv/consts/fileno.h"
#include "third_party/getopt/getopt.h"
#define kUsage \
"Usage:\n\
\n\
%s [-cber] [-o FILE] [ARGS...]\n\
\n\
Flags:\n\
\n\
-e enable emphasis\n\
-b emit as background color\n\
-r print raw codes\n\
-c emit cleanup (reset) codes when done\n\
-o FILE redirects output [default: /dev/stdout]\n\
\n\
Arguments:\n\
\n\
- may be passed via ARGS or STDIN (one per line)\n\
- may be #RRGGBB or RRGGBB\n\
- may be #RGB or RGB (#123 → #112233)\n\
- anything else is printed verbatim\n\
\n"
static FILE *fout_;
static size_t linecap_;
static char *outpath_, *line_;
static bool rawmode_, background_, emphasis_, cleanup_;
noreturn void usage(int rc, FILE *f) {
fprintf(f, kUsage, program_invocation_name);
exit(rc);
}
void getopts(int *argc, char *argv[]) {
int opt;
outpath_ = "-";
while ((opt = getopt(*argc, argv, "?hrecbo:")) != -1) {
switch (opt) {
case 'r':
rawmode_ = true;
break;
case 'b':
background_ = true;
break;
case 'c':
cleanup_ = true;
break;
case 'e':
emphasis_ = true;
break;
case 'o':
outpath_ = optarg;
break;
case '?':
case 'h':
usage(EXIT_SUCCESS, stdout);
default:
usage(EX_USAGE, stderr);
}
}
}
void processarg(const char *arg) {
const char *p;
size_t r, g, b;
if (*(p = arg) == '#') p++;
if (strlen(p) == 3 && (isxdigit(p[0]) && isxdigit(p[1]) && isxdigit(p[2]))) {
r = hextoint(p[0]) << 4 | hextoint(p[0]);
g = hextoint(p[1]) << 4 | hextoint(p[1]);
b = hextoint(p[2]) << 4 | hextoint(p[2]);
} else if (strlen(p) == 6 &&
(isxdigit(p[0]) && isxdigit(p[1]) && isxdigit(p[2]) &&
isxdigit(p[3]) && isxdigit(p[4]) && isxdigit(p[5]))) {
r = hextoint(p[0]) << 4 | hextoint(p[1]);
g = hextoint(p[2]) << 4 | hextoint(p[3]);
b = hextoint(p[4]) << 4 | hextoint(p[5]);
} else {
fputs(arg, fout_);
return;
}
fprintf(fout_, "%s[%s%d;5;%hhum%s", rawmode_ ? "\e" : "\\e",
emphasis_ ? "1;" : "", background_ ? 48 : 38, rgb2tty(r, g, b),
&"\n"[rawmode_]);
}
int main(int argc, char *argv[]) {
size_t i;
getopts(&argc, argv);
CHECK_NOTNULL((fout_ = fopen(outpath_, "w")));
if (optind < argc) {
for (i = optind; i < argc; ++i) {
processarg(argv[i]);
}
} else {
while ((getline(&line_, &linecap_, stdin)) != -1) {
processarg(chomp(line_));
}
free_s(&line_);
}
if (cleanup_) {
fprintf(fout_, "%s[0m\n", rawmode_ ? "\e" : "\\e");
}
CHECK_NE(-1, fclose_s(&fout_));
return 0;
}