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zeniba-nsxiv/options.c
NRK 0ddf494437 introduce parse_optional_no()
2024-08-02 11:11:44 +00:00

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/* Copyright 2011-2020 Bert Muennich
* Copyright 2021-2023 nsxiv contributors
*
* This file is a part of nsxiv.
*
* nsxiv 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; either version 2 of the License,
* or (at your option) any later version.
*
* nsxiv 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 nsxiv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "nsxiv.h"
#include "version.h"
#define INCLUDE_OPTIONS_CONFIG
#include "config.h"
#include <assert.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define OPTPARSE_IMPLEMENTATION
#define OPTPARSE_API static
#pragma GCC diagnostic push /* also works on clang */
#pragma GCC diagnostic ignored "-Wshadow"
#pragma GCC diagnostic ignored "-Wunused-function"
#include "optparse.h"
#pragma GCC diagnostic pop
const opt_t *options;
void print_usage(FILE *stream)
{
fprintf(stream,
"usage: %s [-abcfhiopqrtvZ0] [-A FRAMERATE] [-e WID] [-G GAMMA] "
"[-g GEOMETRY] [-N NAME] [-n NUM] [-S DELAY] [-s MODE] "
"[-z ZOOM] FILES...\n",
progname);
}
static void print_version(void)
{
printf("%s %s\n", progname, VERSION);
fputs("features: "
#if HAVE_INOTIFY
"+inotify "
#endif
#if HAVE_LIBFONTS
"+statusbar "
#endif
#if HAVE_LIBEXIF
"+exif "
#endif
#if HAVE_IMLIB2_MULTI_FRAME
"+multiframe "
#endif
"\n", stdout);
}
static bool parse_optional_no(const char *flag, const char *arg)
{
if (arg != NULL && !STREQ(arg, "no"))
error(EXIT_FAILURE, 0, "Invalid argument for option --%s: %s", flag, arg);
return arg == NULL;
}
void parse_options(int argc, char **argv)
{
enum {
/* ensure these can't be represented in a single byte in order
* to avoid conflicts with short opts
*/
OPT_START = UCHAR_MAX,
OPT_AA,
OPT_AL,
OPT_THUMB,
OPT_BAR,
OPT_BG,
OPT_CA,
OPT_CD
};
static const struct optparse_long longopts[] = {
{ "framerate", 'A', OPTPARSE_REQUIRED },
{ "animate", 'a', OPTPARSE_NONE },
{ "no-bar", 'b', OPTPARSE_NONE },
{ "bar", OPT_BAR, OPTPARSE_NONE },
{ "clean-cache", 'c', OPTPARSE_NONE },
{ "embed", 'e', OPTPARSE_REQUIRED },
{ "fullscreen", 'f', OPTPARSE_NONE },
{ "gamma", 'G', OPTPARSE_REQUIRED },
{ "geometry", 'g', OPTPARSE_REQUIRED },
{ "help", 'h', OPTPARSE_NONE },
{ "stdin", 'i', OPTPARSE_NONE },
{ "class", 'N', OPTPARSE_REQUIRED },
{ "start-at", 'n', OPTPARSE_REQUIRED },
{ "stdout", 'o', OPTPARSE_NONE },
{ "private", 'p', OPTPARSE_NONE },
{ "quiet", 'q', OPTPARSE_NONE },
{ "recursive", 'r', OPTPARSE_NONE },
{ "ss-delay", 'S', OPTPARSE_REQUIRED },
{ "scale-mode", 's', OPTPARSE_REQUIRED },
/* short opt `-t` doesn't accept optional arg for backwards compatibility reasons */
{ NULL, 't', OPTPARSE_NONE },
{ "thumbnail", OPT_THUMB, OPTPARSE_OPTIONAL },
{ "version", 'v', OPTPARSE_NONE },
{ "zoom-100", 'Z', OPTPARSE_NONE },
{ "zoom", 'z', OPTPARSE_REQUIRED },
{ "null", '0', OPTPARSE_NONE },
{ "anti-alias", OPT_AA, OPTPARSE_OPTIONAL },
{ "alpha-layer", OPT_AL, OPTPARSE_OPTIONAL },
/* TODO: document this when it's stable */
{ "bg-cache", OPT_BG, OPTPARSE_OPTIONAL },
{ "cache-allow", OPT_CA, OPTPARSE_REQUIRED },
{ "cache-deny", OPT_CD, OPTPARSE_REQUIRED },
{ 0 }, /* end */
};
long n, opt;
float f;
char *end, *s;
struct optparse op;
const char scalemodes[] = "dfFwh"; /* must be sorted according to scalemode_t */
static opt_t _options;
options = &_options;
_options.from_stdin = false;
_options.to_stdout = false;
_options.using_null = false;
_options.recursive = false;
_options.startnum = 0;
_options.scalemode = SCALE_DOWN;
_options.zoom = 1.0;
_options.anti_alias = ANTI_ALIAS;
_options.alpha_layer = ALPHA_LAYER;
_options.animate = false;
_options.gamma = 0;
_options.slideshow = 0;
_options.framerate = 0;
_options.fullscreen = false;
_options.embed = 0;
_options.hide_bar = false;
_options.geometry = NULL;
_options.res_name = NULL;
_options.tns_filters = TNS_FILTERS;
_options.tns_filters_is_blacklist = TNS_FILTERS_IS_BLACKLIST;
_options.quiet = false;
_options.thumb_mode = false;
_options.clean_cache = false;
_options.private_mode = false;
_options.background_cache = false;
if (argc > 0) {
s = strrchr(argv[0], '/');
progname = s != NULL && s[1] != '\0' ? s + 1 : argv[0];
}
optparse_init(&op, argv);
while ((opt = optparse_long(&op, longopts, NULL)) != -1) {
for (n = 0; n < (int)ARRLEN(longopts); ++n) { /* clang-tidy finds some non-sensical branch and thinks optarg == NULL is possible */
if (opt == longopts[n].shortname && longopts[n].argtype == OPTPARSE_REQUIRED)
assert(op.optarg != NULL);
}
switch (opt) {
case '?':
fprintf(stderr, "%s\n", op.errmsg);
print_usage(stderr);
exit(EXIT_FAILURE);
case 'A':
n = strtol(op.optarg, &end, 0);
if (*end != '\0' || n < 0 || n > INT_MAX)
error(EXIT_FAILURE, 0, "Invalid framerate: %s", op.optarg);
_options.framerate = n;
_options.animate = n > 0;
break;
case 'a':
_options.animate = true;
break;
case 'b': case OPT_BAR:
_options.hide_bar = (opt == 'b');
break;
case 'c':
_options.clean_cache = true;
break;
case 'e':
n = strtol(op.optarg, &end, 0);
if (*end != '\0')
error(EXIT_FAILURE, 0, "Invalid window id: %s", op.optarg);
_options.embed = n;
break;
case 'f':
_options.fullscreen = true;
break;
case 'G':
n = strtol(op.optarg, &end, 0);
if (*end != '\0' || n < INT_MIN || n > INT_MAX)
error(EXIT_FAILURE, 0, "Invalid gamma: %s", op.optarg);
_options.gamma = n;
break;
case 'g':
_options.geometry = op.optarg;
break;
case 'h':
print_usage(stdout);
exit(EXIT_SUCCESS);
case 'i':
_options.from_stdin = true;
break;
case 'n':
n = strtol(op.optarg, &end, 0);
if (*end != '\0' || n <= 0 || n > INT_MAX)
error(EXIT_FAILURE, 0, "Invalid starting number: %s", op.optarg);
_options.startnum = n - 1;
break;
case 'N':
_options.res_name = op.optarg;
break;
case 'o':
_options.to_stdout = true;
break;
case 'p':
_options.private_mode = true;
break;
case 'q':
_options.quiet = true;
break;
case 'r':
_options.recursive = true;
break;
case 'S':
f = strtof(op.optarg, &end) * 10.0f;
if (*end != '\0' || f <= 0 || f >= (float)UINT_MAX)
error(EXIT_FAILURE, 0, "Invalid slideshow delay: %s", op.optarg);
_options.slideshow = (unsigned int)f;
break;
case 's':
s = strchr(scalemodes, op.optarg[0]);
if (s == NULL || *s == '\0' || strlen(op.optarg) != 1)
error(EXIT_FAILURE, 0, "Invalid scale mode: %s", op.optarg);
_options.scalemode = s - scalemodes;
break;
case 't':
_options.thumb_mode = true;
break;
case 'v':
print_version();
exit(EXIT_SUCCESS);
case 'Z':
_options.scalemode = SCALE_ZOOM;
_options.zoom = 1.0f;
break;
case 'z':
n = strtol(op.optarg, &end, 0);
if (*end != '\0' || n <= 0)
error(EXIT_FAILURE, 0, "Invalid zoom level: %s", op.optarg);
_options.scalemode = SCALE_ZOOM;
_options.zoom = (float)n / 100.0f;
break;
case '0':
_options.using_null = true;
break;
case OPT_AA:
_options.anti_alias = parse_optional_no("anti-alias", op.optarg);
break;
case OPT_AL:
_options.alpha_layer = parse_optional_no("alpha-layer", op.optarg);
break;
case OPT_THUMB:
_options.thumb_mode = parse_optional_no("thumbnail", op.optarg);
break;
case OPT_BG:
_options.background_cache = parse_optional_no("bg-cache", op.optarg);
break;
case OPT_CA: case OPT_CD:
_options.tns_filters = op.optarg;
_options.tns_filters_is_blacklist = (opt == OPT_CD);
break;
}
}
_options.filenames = argv + op.optind;
_options.filecnt = argc - op.optind;
if (_options.filecnt == 1 && STREQ(_options.filenames[0], "-")) {
_options.filenames++;
_options.filecnt--;
_options.from_stdin = true;
}
}
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