diff options
Diffstat (limited to 'src/bar.c')
| -rw-r--r-- | src/bar.c | 47 |
1 files changed, 19 insertions, 28 deletions
@@ -1,26 +1,14 @@ -/**************************************************************************** - * bfs * - * Copyright (C) 2020-2022 Tavian Barnes <tavianator@tavianator.com> * - * * - * Permission to use, copy, modify, and/or distribute this software for any * - * purpose with or without fee is hereby granted. * - * * - * 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. * - ****************************************************************************/ +// Copyright © Tavian Barnes <tavianator@tavianator.com> +// SPDX-License-Identifier: 0BSD +#include "prelude.h" #include "bar.h" +#include "atomic.h" #include "bfstd.h" -#include "config.h" +#include "bit.h" #include "dstring.h" #include <errno.h> #include <fcntl.h> -#include <limits.h> #include <signal.h> #include <stdarg.h> #include <stdio.h> @@ -29,8 +17,8 @@ struct bfs_bar { int fd; - volatile sig_atomic_t width; - volatile sig_atomic_t height; + atomic unsigned int width; + atomic unsigned int height; }; /** The global status bar instance. */ @@ -46,8 +34,8 @@ static int bfs_bar_getsize(struct bfs_bar *bar) { return -1; } - bar->width = ws.ws_col; - bar->height = ws.ws_row; + store(&bar->width, ws.ws_col, relaxed); + store(&bar->height, ws.ws_row, relaxed); return 0; #else errno = ENOTSUP; @@ -62,7 +50,7 @@ static int ass_puts(int fd, const char *str) { } /** Number of decimal digits needed for terminal sizes. */ -#define ITOA_DIGITS ((sizeof(unsigned short) * CHAR_BIT + 2) / 3) +#define ITOA_DIGITS ((USHRT_WIDTH + 2) / 3) /** Async Signal Safe itoa(). */ static char *ass_itoa(char *str, unsigned int n) { @@ -87,8 +75,9 @@ static int bfs_bar_resize(struct bfs_bar *bar) { "\033[;"; // DECSTBM: Set scrollable region // DECSTBM takes the height as the second argument + unsigned int height = load(&bar->height, relaxed); char *ptr = esc_seq + strlen(esc_seq); - ptr = ass_itoa(ptr, bar->height - 1); + ptr = ass_itoa(ptr, height - 1); strcpy(ptr, "r" // DECSTBM @@ -138,11 +127,11 @@ static void reset_before_death_by(int sig) { } /** printf() to the status bar with a single write(). */ -BFS_FORMATTER(2, 3) +attr(printf(2, 3)) static int bfs_bar_printf(struct bfs_bar *bar, const char *format, ...) { va_list args; va_start(args, format); - char *str = dstrvprintf(format, args); + dchar *str = dstrvprintf(format, args); va_end(args); if (!str) { @@ -191,13 +180,14 @@ struct bfs_bar *bfs_bar_show(void) { sigaction(SIGWINCH, &sa, NULL); #endif + unsigned int height = load(&the_bar.height, relaxed); bfs_bar_printf(&the_bar, "\n" // Make space for the bar "\0337" // DECSC: Save cursor "\033[;%ur" // DECSTBM: Set scrollable region "\0338" // DECRC: Restore cursor "\033[1A", // CUU: Move cursor up 1 row - (unsigned int)(the_bar.height - 1) + height - 1 ); return &the_bar; @@ -210,10 +200,11 @@ fail: } unsigned int bfs_bar_width(const struct bfs_bar *bar) { - return bar->width; + return load(&bar->width, relaxed); } int bfs_bar_update(struct bfs_bar *bar, const char *str) { + unsigned int height = load(&bar->height, relaxed); return bfs_bar_printf(bar, "\0337" // DECSC: Save cursor "\033[%u;0f" // HVP: Move cursor to row, column @@ -222,7 +213,7 @@ int bfs_bar_update(struct bfs_bar *bar, const char *str) { "%s" "\033[27m" // SGR reverse video off "\0338", // DECRC: Restore cursor - (unsigned int)bar->height, + height, str ); } |