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options.c
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options.c
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/*
* Copyright (c) 2024 Tobias Stoeckmann <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include <limits.h>
#include <pixman.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "config.h"
#include "functions.h"
static size_t
add_buffer(wp_buffer_t **bufs, size_t *count, wp_buffer_t buf)
{
size_t i;
for (i = 0; i < *count; i++)
if ((*bufs)[i].st_dev == buf.st_dev &&
(*bufs)[i].st_ino == buf.st_ino)
break;
if (*count != 0 && i != *count)
fclose(buf.fp);
else {
*bufs = realloc(*bufs, (*count + 1) * sizeof(**bufs));
if (*bufs == NULL)
err(1, "failed to allocate memory");
(*bufs)[(*count)++] = buf;
}
return i;
}
static void
add_option(wp_config_t *config, wp_option_t option)
{
size_t i;
wp_option_t *o;
if (option.filename == NULL)
return;
for (i = 0; i < config->count; i++)
if (config->options[i].output != NULL &&
strcmp(config->options[i].output, option.output) == 0 &&
config->options[i].screen == option.screen)
break;
if (i != config->count)
o = config->options + i;
else {
config->options = realloc(config->options,
(config->count + 2) * sizeof(*config->options));
if (config->options == NULL)
err(1, "failed to allocate memory");
o = &config->options[config->count++];
config->options[config->count].filename = NULL;
}
*o = option;
}
static void
init_buffers(wp_config_t *config)
{
wp_buffer_t *buffers, buffer;
size_t buffers_count, i, len;
size_t *refs;
if (config->count == 0)
return;
SAFE_MUL(len, config->count, sizeof(*refs));
refs = xmalloc(len);
buffers = NULL;
buffers_count = 0;
buffer = (wp_buffer_t){ 0 };
for (i = 0; i < config->count; i++) {
struct stat st;
if ((buffer.fp = fopen(config->options[i].filename, "rb"))
== NULL)
err(1, "open '%s' failed", config->options[i].filename);
if (fstat(fileno(buffer.fp), &st))
err(1, "stat '%s' failed", config->options[i].filename);
buffer.st_dev = st.st_dev;
buffer.st_ino = st.st_ino;
refs[i] = add_buffer(&buffers, &buffers_count, buffer);
}
for (i = 0; i < config->count; i++)
config->options[i].buffer = &buffers[refs[i]];
free(refs);
}
static int
parse_mode(char *mode)
{
if (strcmp(mode, "--center") == 0)
return MODE_CENTER;
if (strcmp(mode, "--focus") == 0)
return MODE_FOCUS;
if (strcmp(mode, "--maximize") == 0)
return MODE_MAXIMIZE;
if (strcmp(mode, "--stretch") == 0)
return MODE_STRETCH;
if (strcmp(mode, "--tile") == 0)
return MODE_TILE;
if (strcmp(mode, "--zoom") == 0)
return MODE_ZOOM;
return -1;
}
static int
parse_screen(char *screen)
{
char *endptr;
long value;
value = strtol(screen, &endptr, 10);
if (endptr == screen || *endptr != '\0' || value < 0 || value > INT_MAX)
errx(1, "failed to parse screen number: %s", screen);
return value;
}
static int
parse_box(char *s, wp_box_t **box)
{
wp_box_t b;
switch (sscanf(s, "%hux%hu+%hu+%hu", &b.width, &b.height,
&b.x_off, &b.y_off)) {
case 2:
b.x_off = 0;
b.y_off = 0;
break;
case 4:
break;
default:
return 1;
/* NOTREACHED */
}
if (UINT16_MAX - b.width < b.x_off ||
UINT16_MAX - b.height < b.y_off ||
b.width == 0 || b.height == 0)
return 1;
*box = xmalloc(sizeof(*box));
**box = b;
return 0;
}
wp_config_t *
parse_config(char **argv)
{
wp_config_t *config;
wp_option_t last;
config = xmalloc(sizeof(*config));
*config = (wp_config_t){
.options = NULL,
.count = 0,
.daemon = 0,
.source = SOURCE_ATOMS,
.target = TARGET_ATOMS | TARGET_ROOT
};
last = (wp_option_t){ .screen = -1 };
while (*argv != NULL) {
if (strcmp(argv[0], "--daemon") == 0) {
if (has_randr == 0) {
warnx("--daemon requires RandR");
return NULL;
}
config->daemon = 1;
} else if (strcmp(argv[0], "--debug") == 0)
show_debug = 1;
else if (strcmp(argv[0], "--clear") == 0)
config->source = 0;
else if (strcmp(argv[0], "--no-atoms") == 0) {
config->target &= ~TARGET_ATOMS;
if (config->target == 0) {
warnx("--no-atoms conflicts with --no-root");
return NULL;
}
} else if (strcmp(argv[0], "--no-root") == 0) {
config->target &= ~TARGET_ROOT;
if (config->target == 0) {
warnx("--no-root conflicts with --no-atoms");
return NULL;
}
} else if (strcmp(argv[0], "--screen") == 0) {
if (*++argv == NULL) {
warnx("missing argument for --screen");
return NULL;
}
last.screen = parse_screen(*argv);
} else if (strcmp(argv[0], "--output") == 0) {
if (*++argv == NULL) {
warnx("missing argument for --output");
return NULL;
}
if (has_randr == 0) {
warnx("--output requires RandR");
return NULL;
}
add_option(config, last);
last.trim = NULL;
last.output = *argv;
} else if ((last.mode = parse_mode(*argv)) != -1) {
if (*++argv == NULL) {
warnx("missing argument for %s", *(argv - 1));
return NULL;
}
last.filename = *argv;
} else if (strcmp(argv[0], "--no-randr") == 0) {
if (config->count > 0) {
warnx("--no-randr conflicts with --output");
return NULL;
}
if (config->daemon) {
warnx("--daemon requires RandR");
return NULL;
}
has_randr = 0;
} else if (strcmp(argv[0], "--trim") == 0) {
if (*++argv == NULL) {
warnx("missing argument for --trim");
return NULL;
}
if (parse_box(*argv, &last.trim)) {
warnx("invalid trim box: %s\n", *argv);
return NULL;
}
} else if (strcmp(argv[0], "--version") == 0) {
puts(VERSION);
exit(0);
} else {
warnx("illegal argument: %s", *argv);
return NULL;
}
++argv;
}
if (has_randr == -1 && last.output == NULL)
last.output = "all";
add_option(config, last);
if (!(config->target & TARGET_ATOMS))
config->source = 0;
if (config->count == 0 && config->source != 0)
return NULL;
init_buffers(config);
return config;
}