134 lines
4.7 KiB
C
134 lines
4.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "dsp/tty/quant.h"
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#include "libc/calls/calls.h"
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#include "libc/log/check.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/ex.h"
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#include "libc/sysv/consts/exit.h"
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#include "libc/sysv/consts/fileno.h"
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#include "third_party/getopt/getopt.h"
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#define kUsage \
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"Usage:\n\
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\n\
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%s [-cber] [-o FILE] [ARGS...]\n\
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\n\
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Flags:\n\
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\n\
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-e enable emphasis\n\
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-b emit as background color\n\
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-r print raw codes\n\
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-c emit cleanup (reset) codes when done\n\
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-o FILE redirects output [default: /dev/stdout]\n\
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\n\
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Arguments:\n\
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\n\
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- may be passed via ARGS or STDIN (one per line)\n\
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- may be #RRGGBB or RRGGBB\n\
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- may be #RGB or RGB (#123 → #112233)\n\
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- anything else is printed verbatim\n\
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\n"
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static FILE *fout_;
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static size_t linecap_;
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static char *outpath_, *line_;
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static bool rawmode_, background_, emphasis_, cleanup_;
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noreturn void usage(int rc, FILE *f) {
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fprintf(f, kUsage, program_invocation_name);
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exit(rc);
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}
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void getopts(int *argc, char *argv[]) {
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int opt;
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outpath_ = "-";
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while ((opt = getopt(*argc, argv, "?hrecbo:")) != -1) {
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switch (opt) {
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case 'r':
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rawmode_ = true;
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break;
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case 'b':
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background_ = true;
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break;
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case 'c':
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cleanup_ = true;
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break;
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case 'e':
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emphasis_ = true;
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break;
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case 'o':
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outpath_ = optarg;
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break;
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case '?':
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case 'h':
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usage(EXIT_SUCCESS, stdout);
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default:
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usage(EX_USAGE, stderr);
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}
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}
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}
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void processarg(const char *arg) {
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const char *p;
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size_t r, g, b;
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if (*(p = arg) == '#') p++;
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if (strlen(p) == 3 && (isxdigit(p[0]) && isxdigit(p[1]) && isxdigit(p[2]))) {
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r = hextoint(p[0]) << 4 | hextoint(p[0]);
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g = hextoint(p[1]) << 4 | hextoint(p[1]);
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b = hextoint(p[2]) << 4 | hextoint(p[2]);
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} else if (strlen(p) == 6 &&
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(isxdigit(p[0]) && isxdigit(p[1]) && isxdigit(p[2]) &&
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isxdigit(p[3]) && isxdigit(p[4]) && isxdigit(p[5]))) {
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r = hextoint(p[0]) << 4 | hextoint(p[1]);
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g = hextoint(p[2]) << 4 | hextoint(p[3]);
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b = hextoint(p[4]) << 4 | hextoint(p[5]);
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} else {
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fputs(arg, fout_);
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return;
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}
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fprintf(fout_, "%s[%s%d;5;%hhum%s", rawmode_ ? "\e" : "\\e",
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emphasis_ ? "1;" : "", background_ ? 48 : 38, rgb2tty(r, g, b),
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&"\n"[rawmode_]);
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}
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int main(int argc, char *argv[]) {
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size_t i;
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getopts(&argc, argv);
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CHECK_NOTNULL((fout_ = fopen(outpath_, "w")));
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if (optind < argc) {
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for (i = optind; i < argc; ++i) {
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processarg(argv[i]);
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}
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} else {
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while ((getline(&line_, &linecap_, stdin)) != -1) {
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processarg(chomp(line_));
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}
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free_s(&line_);
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}
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if (cleanup_) {
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fprintf(fout_, "%s[0m\n", rawmode_ ? "\e" : "\\e");
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}
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CHECK_NE(-1, fclose_s(&fout_));
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return 0;
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}
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