new_getcaps.c

来自「基于网络编程的例子」· C语言 代码 · 共 86 行

/* 
 * new_getcaps.c - Get and show terminal capabilities using 
 *                 terminfo data structures and functions
 */
#include <stdlib.h>
#include <stdio.h>
#include <term.h>
#include <curses.h>
#include <unistd.h> /* for sleep() */

#define NUMCAPS 3

void clrscr(void);
void mv_cursor(int, int);

int main(void)
{
     char *boolcaps[NUMCAPS] = { "am", "bce", "km" };
     char *numcaps[NUMCAPS] = { "cols", "lines", "colors" };
     char *strcaps[NUMCAPS] = { "cup", "flash", "hpa" };
     char *buf;
     int retval, i;

     if(setupterm(NULL, fileno(stdout), NULL) != OK) {
          perror("setupterm()");
          exit(EXIT_FAILURE);
     }

     clrscr();
     for(i = 0; i < NUMCAPS; ++i) {
          /* position the cursor */
          mv_cursor(i, 10);
          retval = tigetflag(boolcaps[i]);
          if(retval == FALSE) {
               printf("`%s' unsupported\n", boolcaps[i]);
          } else {
               printf("`%s' supported\n", boolcaps[i]);
	  }
     }
     sleep(3);

     clrscr();
     for(i = 0; i < NUMCAPS; ++i) {
          mv_cursor(i, 10);
          retval = tigetnum(numcaps[i]);
          if(retval == ERR) {
               printf("`%s' unsupported\n", numcaps[i]);
          } else {
               printf("`%s' is %d\n", numcaps[i], retval);
	  }
     }
     sleep(3);

     clrscr();
     for(i = 0; i < NUMCAPS; ++i) {
          mv_cursor(i, 10);
          buf = tigetstr(strcaps[i]);
          if(buf == NULL) {
               printf("`%s' unsupported\n", strcaps[i]);
          } else {
               printf("`%s' is \\E%s\n", strcaps[i], &buf[1]);
	  }
     }
     sleep(3);

     exit(0);
}

/*
 * Clear the screen
 */
void clrscr(void)
{
     char *buf = tigetstr("clear");
     putp(buf);
}

/*
 * Move the cursor to the specified row row and column col
 */
void mv_cursor(int row, int col)
{
     char *cap = tigetstr("cup");
     putp(tparm(cap, row, col));
}