diff options
| -rw-r--r-- | l.c | 24 |
1 files changed, 15 insertions, 9 deletions
@@ -12,6 +12,8 @@ #define ESC "\033" #define CSI ESC "[" +#define prn(...) dprintf(ttyfd, __VA_ARGS__) + int ttyfd; /* enable/disable "raw" mode */ @@ -42,7 +44,7 @@ int cpr(int *x, int *y) { char c, xbuf[4], ybuf[4]; int i; - write (1, CSI "6n", 2+2); + prn(CSI "6n"); /* get CSI */ read(1, &c, 1); @@ -81,9 +83,12 @@ void left() {} int main() { char c, *p; - char *ex = "file1 file2 file3\r\nfile4 file5 file6\r\nfile7"; - int i, r, x, x2, y, y2; + int i, r; struct winsize w; + int height; /* height of output in rows */ + int x, y; /* original cursor position in cols, rows */ + + char *ex = "file1 file2 file3\r\nfile4 file5 file6\r\nfile7"; ttyfd = open("/dev/tty", O_RDWR); if (ttyfd == -1) err(1, "open"); @@ -95,25 +100,25 @@ int main() { if (r == -1) goto quit; /* print output */ - dprintf(ttyfd, "%s", ex); + prn("%s", ex); /* get height of output */ p = ex - 1; - i = 0; + height = 0; while (*(++p) != '\0') - if (*p == '\n') i++; + if (*p == '\n') height++; /* get height of terminal */ r = ioctl(ttyfd, TIOCGWINSZ, &w); if (r == -1) err(1, "ioctl"); /* correct cursor position if original cursor was near bottom */ - r = y + i - w.ws_row; + r = y + height - w.ws_row; if (r > 0) y = y - r; - /* restore original cursor position */ - dprintf(ttyfd, "%s%d;%dH", CSI, y, x); /* restore cursor position (CUP) */ + /* restore original cursor position (CUP) */ + prn("%s%d;%dH", CSI, y, x); while (read(0, &c, 1) != 0) { switch (c) { @@ -133,5 +138,6 @@ int main() { } quit: + prn(CSI "J"); /* delete from cursor to end of display (ED) */ raw(false); } |