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96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/*
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* terminfo.c: get TTY/console's buffer
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* height and width.
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*
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* TODO: test this on Windows 10.
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*
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* why is all Windows programming so
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* damn complicated.
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*
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* Thanks to this SO question for Windows stuff:
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* stackoverflow.com/questions/6812224/getting-terminal-size-in-c-for-windows
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*
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* (c) Kiëd Llaentenn and contributors
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* See the LICENSE.md file for copyright
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* information.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "terminfo.h"
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#if defined(_WIN32) || defined(__WIN32__)
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#define WOE_IS_ME
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#endif
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#ifdef WOE_IS_ME
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#include <windows.h>
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#else
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#include <sys/ioctl.h>
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#include <unistd.h>
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#endif
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/*
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* sizes to fall back to if:
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* 1) stdout isn't a tty
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* 2) if on Windows (temporary, only until win32
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* support it added
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*/
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const uint16_t fallback_width = 80;
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const uint16_t fallback_height = 24;
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/* file descriptor to get dimensions of */
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#ifdef WOE_IS_ME
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CONST DWORD fd = STD_OUTPUT_HANDLE;
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#else
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const size_t fd = STDOUT_FILENO;
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#endif
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uint16_t
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ttywidth(void)
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{
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#ifdef WOE_IS_ME
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/* why on earth does _isatty return NONZERO
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* if FD is a tty?! */
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if (_isatty(fd))
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return fallback_width;
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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GetConsoleScreenBufferInfo(
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GetStdHandle(fd), &csbi
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);
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return csbi.srWindow.Right - csbi.srWindow.Left + 1;
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#else
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if (!isatty(fd))
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return fallback_width;
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struct winsize w;
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ioctl(fd, TIOCGWINSZ, &w);
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return w.ws_col;
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#endif
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}
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uint16_t
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ttyheight(void)
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{
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#ifdef WOE_IS_ME
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if (_isatty(fd))
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return fallback_height;
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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GetConsoleScreenBufferInfo(
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GetStdHandle(fd), &csbi
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);
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return csbi.srWindow.Bottom - csbi.srWindow.Top + 1;
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#else
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if (!isatty(fd))
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return fallback_height;
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struct winsize w;
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ioctl(fd, TIOCGWINSZ, &w);
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return w.ws_row;
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#endif
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}
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