X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=src%2Fgacela.c;h=af78da97433302a1a775cd16ffdbb95fe72972a0;hb=85190d9f178de47361cb8bc77aaf3197632b1337;hp=ad85b740a14a95e75726ef0562964609e3e122cc;hpb=e5fb1dc4dd17359c5769e4be4ece63df2c8bbade;p=gacela.git

diff --git a/src/gacela.c b/src/gacela.c
index ad85b74..af78da9 100644
--- a/src/gacela.c
+++ b/src/gacela.c
@@ -15,46 +15,374 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include <stdio.h>
+#include <string.h>
 #include <libguile.h>
 #include <libgen.h>
+#include <readline/readline.h>
+#include <readline/history.h>
+#include <signal.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+
 #include "gacela_SDL.h"
 #include "gacela_GL.h"
+#include "gacela_FTGL.h"
+
+// Global variables
+int ctrl_c = 0;
+int pid = 0;
+char *history_path = NULL;
+
+
+static int
+find_matching_paren (int k)
+{
+  register int i;
+  register char c = 0;
+  int end_parens_found = 0;
+
+  // Choose the corresponding opening bracket
+  if (k == ')') c = '(';
+  else if (k == ']') c = '[';
+  else if (k == '}') c = '{';
+
+  for (i = rl_point-2; i >= 0; i--)
+    {
+      // Is the current character part of a character literal?
+      if (i - 2 >= 0
+ 	  && rl_line_buffer[i - 1] == '\\'
+ 	  && rl_line_buffer[i - 2] == '#')
+ 	;
+      else if (rl_line_buffer[i] == k)
+ 	end_parens_found++;
+      else if (rl_line_buffer[i] == '"')
+ 	{
+ 	  // Skip over a string literal
+ 	  for (i--; i >= 0; i--)
+ 	    if (rl_line_buffer[i] == '"'
+ 		&& ! (i - 1 >= 0
+ 		      && rl_line_buffer[i - 1] == '\\'))
+ 	      break;
+ 	}
+      else if (rl_line_buffer[i] == c)
+ 	{
+ 	  if (end_parens_found==0) return i;
+ 	  else --end_parens_found;
+ 	}
+    }
+  return -1;
+}
+
+static int
+match_paren (int x, int k)
+{
+  int tmp;
+  int fno;
+  SELECT_TYPE readset;
+  struct timeval timeout;
+
+  rl_insert (x, k);
+
+  // Did we just insert a quoted paren?  If so, then don't bounce
+  if (rl_point - 1 >= 1
+      && rl_line_buffer[rl_point - 2] == '\\')
+    return 0;
+
+  tmp = 500000;
+  timeout.tv_sec = tmp / 1000000;
+  timeout.tv_usec = tmp % 1000000;
+  FD_ZERO (&readset);
+  fno = fileno (rl_instream);
+  FD_SET (fno, &readset);
+
+  if (rl_point > 1)
+    {
+      tmp = rl_point;
+      rl_point = find_matching_paren (k);
+      if (rl_point > -1)
+        {
+          rl_redisplay ();
+          scm_std_select (fno + 1, &readset, NULL, NULL, &timeout);
+        }
+      rl_point = tmp;
+    }
+  return 0;
+}
+
+void
+ctrl_c_handler (int signum)
+{
+  printf ("ERROR: User interrupt\nABORT: (signal)\n");
+  ctrl_c = 1;
+}
+
+void
+child_dies_handler (int signum)
+{
+  write_history (history_path);
+  exit (0);
+}
+
+static void
+init_gacela_client ()
+{
+  struct sigaction ctrl_c_action, child_dies_action;
+
+  // init bouncing parens
+  rl_bind_key (')', match_paren);
+  rl_bind_key (']', match_paren);
+  rl_bind_key ('}', match_paren);
+
+  // SIGINT
+  ctrl_c_action.sa_handler = ctrl_c_handler;
+  sigemptyset (&ctrl_c_action.sa_mask);
+  ctrl_c_action.sa_flags = 0;
+
+  sigaction (SIGINT, &ctrl_c_action, NULL);
+
+  // SIGALRM
+  if (pid != 0) {
+    child_dies_action.sa_handler = child_dies_handler;
+    sigemptyset (&child_dies_action.sa_mask);
+    child_dies_action.sa_flags = 0;
+
+    sigaction (SIGALRM, &child_dies_action, NULL);
+  }
+
+}
+
+int
+opened_parens (char *line, int k)
+{
+  int i;
+  int opened = 0;
+  char c = 0;
+
+  // Choose the corresponding opening bracket
+  if (k == ')') c = '(';
+  else if (k == ']') c = '[';
+  else if (k == '}') c = '{';
+
+  for (i = 0; i < strlen (line); i++) {
+    // Is the current character part of a character literal?
+    if (i + 2 >= strlen (line)
+	&& line[i] == '#'
+	&& line[i + 1] == '\\')
+      i = i + 2;
+    else if (line[i] == '"') {
+      // Skip over a string literal
+      for (i++; i < strlen (line); i++)
+	if (line[i] == '"'
+	    && line[i - 1] != '\\')
+ 	      break;
+    }
+    else if (line[i] == ';') {
+      // Comment until endline
+      break;
+    }
+    else if (line[i] == c)
+      opened++;
+    else if (line[i] == k)
+      opened--;
+  }
+
+  return opened;
+}
+
+void
+gacela_client (SCM rec_channel, SCM send_channel)
+{
+  int n;
+  SCM buffer;
+  char *line = NULL, *line_for_sending = NULL;
+  int opened = 0;
+
+  // Command line
+  asprintf (&history_path, "%s/.gacela_history", getenv("HOME"));
+
+  init_gacela_client ();
+  read_history (history_path);
+
+  while (1) {
+    if (opened > 0)
+      line = readline ("... ");
+    else
+      line = readline ("gacela> ");
+
+    if (!line) break;
+
+    opened += opened_parens (line, ')');
+    ctrl_c = 0;
+
+    if (line && *line)
+      {
+	add_history (line);
+	if (line_for_sending == NULL) {
+	  line_for_sending = strdup (line);
+	}
+	else {
+	  line_for_sending = realloc (line_for_sending, strlen (line_for_sending) + strlen (line) + 2);
+	  line_for_sending = strcat (line_for_sending, "\n");
+	  line_for_sending = strcat (line_for_sending, line);
+	}
+
+	if (opened <= 0) {
+	  scm_write (scm_from_locale_string (line_for_sending), send_channel);
+	  scm_force_output (send_channel);
+	  free (line_for_sending);
+	  line_for_sending = NULL;
+
+	  while (scm_char_ready_p (rec_channel) == SCM_BOOL_F) {
+	    if (ctrl_c) break;
+	    sleep (0.5);
+	  }
+	  if (ctrl_c)
+	    ctrl_c = 0;
+	  else {
+	    buffer = scm_read (rec_channel);
+	    if (strlen (scm_to_locale_string (buffer)) > 0)
+	      printf ("%s\n", scm_to_locale_string (buffer));
+	  }
+	}
+      }
+    free (line);
+  }
+
+  write_history (history_path);
+  free (history_path);
+}
 
 static void*
-register_functions (void* data)
+init_scheme (void *data, int argc, char **argv)
 {
+  // Guile configuration
+  scm_c_eval_string ("(set-repl-prompt! \"gacela> \")");
+  scm_c_eval_string ("(use-modules (ice-9 readline))");
+  scm_c_eval_string ("(activate-readline)");
+  scm_c_eval_string ("(use-modules (ice-9 optargs))");
+  scm_c_eval_string ("(use-modules (ice-9 receive))");
+
+  // Bindings for C functions and structs
   SDL_register_functions (NULL);
   GL_register_functions (NULL);
+  FTGL_register_functions (NULL);
+
   return NULL;
 }
 
 void
 load_scheme_files (char *path)
 {
-  load_scheme_file (path, "gacela.scm");
+  char load_path[strlen (path) + 1024];
+
+  sprintf (load_path, "(set! %%load-path (cons \"%s\" %%load-path))", path);
+  scm_c_eval_string (load_path);
+  scm_primitive_load_path (scm_from_locale_string ("gacela_loader.scm"));
 }
 
 void
-load_scheme_file (char *path, char *filename)
+init_gacela (char *path)
 {
-  char fn[strlen (path) + 1024];
+  scm_with_guile (&init_scheme, NULL);
+  load_scheme_files (path);
+  scm_c_eval_string ("(init-video-mode)");
+}
 
-  strcpy (fn, path);
-  strcat (fn, "/");
-  strcat (fn, filename);
+void
+start_server (int port)
+{
+  char *start_server;
+
+  asprintf (&start_server, "(start-server #:port %d)", port);
+  scm_c_eval_string (start_server);
+}
+
+void
+start_local_server (SCM pipes)
+{
+  char start_server[100];
 
-  scm_c_primitive_load (fn);
+  scm_c_define ("pipes", pipes);
+  scm_c_eval_string ("(start-server #:pipes pipes)");
+}
+
+void
+start_remote_client (char *hostname, int port)
+{
+  SCM client_socket;
+  char *connect_to_server;
+
+  asprintf (&connect_to_server, "(let ((s (socket PF_INET SOCK_STREAM 0))) (connect s AF_INET (car (hostent:addr-list (gethost \"%s\"))) %d) s)", hostname, port);
+  client_socket = scm_c_eval_string (connect_to_server);
+  gacela_client (client_socket, client_socket);
 }
 
 int
 main (int argc, char *argv[])
 {
-  scm_with_guile (&register_functions, NULL);
+  char *arg;
+  int mode = 0;   // dev: 1, server: 2, client: 3
+  char *host;
+  int port = 0;
+  int i;
+  SCM fd1, fd2;
+
+  // Checking arguments
+  for (i = 1; i < argc; i++) {
+    if (strcmp (argv[i], "--dev") == 0)
+      mode = 1;
+    else if (strncmp (argv[i], "--server", 8) == 0) {
+      mode = 2;
+      arg = strtok (argv[i], "=");
+      arg = strtok (NULL, "=");
+      if (arg != NULL)
+	port = atoi (arg);
+    }
+    else if (strncmp (argv[i], "--client", 8) == 0) {
+      mode = 3;
+      arg = strtok (argv[i], "=");
+      arg = strtok (NULL, "=");
+      if (arg != NULL) {
+	host = strtok (arg, ":");
+	arg = strtok (NULL, ":");
+	if (arg != NULL)
+	  port = atoi (arg);
+      }
+    }
+  }
+
   scm_init_guile ();
-  scm_c_eval_string ("(set-repl-prompt! \"gacela>\")");
-  scm_c_eval_string ("(use-modules (ice-9 readline))");
-  scm_c_eval_string ("(activate-readline)");
-  scm_c_eval_string ("(use-modules (ice-9 optargs))");
-  load_scheme_files (dirname (argv[0]));
-  scm_shell (argc, argv);
+
+  if (mode == 1) {
+    fd1 = scm_pipe ();
+    fd2 = scm_pipe ();
+    pid = fork ();
+
+    if (pid == 0) {
+      scm_close (SCM_CAR (fd1));
+      scm_close (SCM_CDR (fd2));
+      init_gacela (dirname (argv[0]));
+      start_local_server (scm_cons (SCM_CAR (fd2), SCM_CDR (fd1)));
+      kill (getppid (), SIGALRM);
+    }
+    else {
+      scm_close (SCM_CDR (fd1));
+      scm_close (SCM_CAR (fd2));
+      gacela_client (SCM_CAR (fd1), SCM_CDR (fd2));
+      kill (pid, SIGKILL);
+    }
+  }
+  else if (mode == 2 && port != 0) {
+    init_gacela (dirname (argv[0]));
+    start_server (port);
+  }
+  else if (mode == 3 && port != 0)
+    start_remote_client (host, port);
+  else {
+    init_gacela (dirname (argv[0]));
+    scm_shell (argc, argv);
+    SDL_Quit ();
+  }
 }