X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=src%2Fgacela.c;h=af78da97433302a1a775cd16ffdbb95fe72972a0;hb=85190d9f178de47361cb8bc77aaf3197632b1337;hp=6891d4b9f1180e661f256703cd07fde8b68c1c18;hpb=e82142f2231e5aacf47e3f0cf5e82679d4291af2;p=gacela.git

diff --git a/src/gacela.c b/src/gacela.c
index 6891d4b..af78da9 100644
--- a/src/gacela.c
+++ b/src/gacela.c
@@ -30,8 +30,11 @@
 #include "gacela_GL.h"
 #include "gacela_FTGL.h"
 
-// Generic variables
+// Global variables
 int ctrl_c = 0;
+int pid = 0;
+char *history_path = NULL;
+
 
 static int
 find_matching_paren (int k)
@@ -114,11 +117,18 @@ 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 new_action;
+  struct sigaction ctrl_c_action, child_dies_action;
 
   // init bouncing parens
   rl_bind_key (')', match_paren);
@@ -126,11 +136,59 @@ init_gacela_client ()
   rl_bind_key ('}', match_paren);
 
   // SIGINT
-  new_action.sa_handler = ctrl_c_handler;
-  sigemptyset (&new_action.sa_mask);
-  new_action.sa_flags = 0;
+  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);
+  }
 
-  sigaction (SIGINT, &new_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
@@ -138,8 +196,8 @@ gacela_client (SCM rec_channel, SCM send_channel)
 {
   int n;
   SCM buffer;
-  char *line;
-  char *history_path;
+  char *line = NULL, *line_for_sending = NULL;
+  int opened = 0;
 
   // Command line
   asprintf (&history_path, "%s/.gacela_history", getenv("HOME"));
@@ -148,25 +206,45 @@ gacela_client (SCM rec_channel, SCM send_channel)
   read_history (history_path);
 
   while (1) {
-    line = readline ("gacela> ");
-    ctrl_c = 0;
+    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);
-	scm_write (scm_from_locale_string (line), send_channel);
-	scm_force_output (send_channel);
-
-	while (scm_char_ready_p (rec_channel) == SCM_BOOL_F) {
-	  if (ctrl_c) break;
-	  sleep (0.5);
+	if (line_for_sending == NULL) {
+	  line_for_sending = strdup (line);
 	}
-	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));
+	  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);
@@ -250,7 +328,6 @@ main (int argc, char *argv[])
   int port = 0;
   int i;
   SCM fd1, fd2;
-  int pid;
 
   // Checking arguments
   for (i = 1; i < argc; i++) {
@@ -288,6 +365,7 @@ main (int argc, char *argv[])
       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));