66 lines
1.1 KiB
C
66 lines
1.1 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <unistd.h>
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int z__b_stream_is_tty(FILE *fp)
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{
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return isatty(fileno(fp));
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}
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int z__b_stream_dimensions(FILE *fp, unsigned int *w, unsigned int *h)
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{
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if (!isatty(fileno(fp))) {
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return -1;
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}
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struct winsize ws;
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if (ioctl(fileno(fp), TIOCGWINSZ, &ws) == -1) {
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return -1;
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}
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if (w) {
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*w = ws.ws_col;
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}
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if (h) {
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*h = ws.ws_row;
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}
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return 0;
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}
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int z__b_stream_cursorpos(FILE *in, FILE *out, unsigned int *x, unsigned int *y)
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{
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if (!isatty(fileno(in)) || !isatty(fileno(out))) {
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return -1;
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}
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struct termios term, restore;
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tcgetattr(fileno(in), &term);
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tcgetattr(fileno(in), &restore);
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term.c_lflag &= ~(ICANON | ECHO);
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tcsetattr(fileno(in), TCSANOW, &term);
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const char *cmd = "\033[6n";
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write(fileno(out), cmd, strlen(cmd));
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char buf[64];
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read(fileno(in), buf, sizeof buf);
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tcsetattr(fileno(in), TCSANOW, &restore);
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unsigned int row, col;
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int r = sscanf(buf, "\033[%u;%uR", &row, &col);
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if (r != 2) {
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return -1;
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}
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*x = col - 1;
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*y = row - 1;
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return 0;
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}
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