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_file (char *path, char *filename)
+load_scheme_files (char *path)
+{
+ 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
+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;
- scm_c_primitive_load (fn);
+ asprintf (&start_server, "(start-server #:port %d)", port);
+ scm_c_eval_string (start_server);
}
void
-load_scheme_files (char *path)
+start_local_server (SCM pipes)
+{
+ char start_server[100];
+
+ scm_c_define ("pipes", pipes);
+ scm_c_eval_string ("(start-server #:pipes pipes)");
+}
+
+void
+start_remote_client (char *hostname, int port)
{
- load_scheme_file (path, "gacela.scm");
- load_scheme_file (path, "gacela_ttf.scm");
+ 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 (®ister_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 ();
+ }
}
projects / gacela.git / blobdiff