commit bash-20150529 snapshot

lib/readline/examples/rl-callbacktest2.c

@@ -0,0 +1,143 @@
+/* Standard include files. stdio.h is required. */
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+/* Used for select(2) */
+#include <sys/types.h>
+#include <sys/select.h>
+#include <errno.h>
+
+#include <signal.h>
+
+#include <stdio.h>
+
+/* Standard readline include files. */
+#if defined (READLINE_LIBRARY)
+#  include "readline.h"
+#  include "history.h"
+#else
+#  include <readline/readline.h>
+#  include <readline/history.h>
+#endif
+
+static void cb_linehandler (char *);
+static void sigint_sighandler (int);
+static int sigint_handler (int);
+
+static int saw_signal = 0;
+
+int running;
+const char *prompt = "rltest$ ";
+char *input_string;
+
+/* Callback function called for each line when accept-line executed, EOF
+   seen, or EOF character read.  This sets a flag and returns; it could
+   also call exit(3). */
+static void
+cb_linehandler (char *line)
+{
+  if (line && *line)
+    add_history (line);
+  printf ("input line: %s\n", line ? line : "");
+  input_string = line;
+  rl_callback_handler_remove ();
+}
+
+static char *
+cb_readline ()
+{
+  fd_set fds;
+  int r, err;
+  char *not_done = "";
+  
+  /* Install the line handler. */
+  rl_callback_handler_install (prompt, cb_linehandler);
+
+if (RL_ISSTATE (RL_STATE_ISEARCH))
+  fprintf(stderr, "cb_readline: after handler install, state (ISEARCH) = %d", rl_readline_state);
+else if (RL_ISSTATE (RL_STATE_NSEARCH))
+  fprintf(stderr, "cb_readline: after handler install, state (NSEARCH) = %d", rl_readline_state);
+/* MULTIKEY VIMOTION NUMERICARG _rl_callback_func */
+
+  FD_ZERO (&fds);
+  FD_SET (fileno (rl_instream), &fds);    
+
+  input_string = not_done;
+
+  while (input_string == not_done)
+    {
+      r = err = 0;
+      /* Enter a simple event loop.  This waits until something is available
+	 to read on readline's input stream (defaults to standard input) and
+	 calls the builtin character read callback to read it.  It does not
+	 have to modify the user's terminal settings. */
+      while (r == 0)
+	{
+	  struct timeval timeout = {0, 100000};
+	  struct timeval *timeoutp = NULL;      
+
+	  timeoutp = &timeout;
+	  FD_SET (fileno (rl_instream), &fds);    
+	  r = select (FD_SETSIZE, &fds, NULL, NULL, timeoutp);
+	  err = errno;
+	}
+
+      if (saw_signal)
+        sigint_handler (saw_signal);
+
+      if (r < 0)
+	{
+	  perror ("rltest: select");
+	  rl_callback_handler_remove ();
+	  break;
+	}
+
+      /* if (FD_ISSET (fileno (rl_instream), &fds)) */
+      if (r > 0)
+	rl_callback_read_char ();
+    }
+  return input_string;
+}
+
+void
+sigint_sighandler (s)
+     int s;
+{
+  saw_signal = s;
+}
+
+int
+sigint_handler (s)
+     int s;
+{
+  rl_free_line_state ();
+  rl_callback_sigcleanup ();
+  rl_cleanup_after_signal ();
+  rl_callback_handler_remove ();
+  saw_signal = 0;
+fprintf(stderr, "sigint_handler: readline state = %d\r\n", rl_readline_state);
+  return s;  
+}
+
+int
+main (int c, char **v)
+{
+  char *p;
+
+  running = 1;
+  rl_catch_signals = 1;
+
+  rl_bind_key_in_map ('r', rl_history_search_backward, emacs_meta_keymap);
+  rl_bind_key_in_map ('s', rl_history_search_forward, emacs_meta_keymap);
+
+  signal (SIGINT, sigint_sighandler);
+  while (running)
+    {
+      p = cb_readline ();
+      if (p == 0 || strcmp (p, "exit") == 0)
+        break;
+    }
+  printf ("rl-callbacktest2: Event loop has exited\n");
+  return 0;
+}