Removes all dependencies on glib

1 files changed, 168 insertions, 0 deletions

diff --git a/hcid/glib-ectomy.c b/hcid/glib-ectomy.c
new file mode 100644
index 00000000..0f168d80
--- /dev/null
+++ b/hcid/glib-ectomy.c
@@ -0,0 +1,168 @@
+#include "glib-ectomy.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+
+// static void remove_watch(int fd);
+
+GIOError    g_io_channel_read   (GIOChannel    *channel, 
+			         gchar         *buf, 
+			         gsize          count,
+			         gsize         *bytes_read)
+{
+	int fd = channel->fd;
+	gssize result;
+	
+  if (count > SSIZE_MAX) /* At least according to the Debian manpage for read */
+    count = SSIZE_MAX;
+
+ retry:
+  result = read (fd, buf, count);
+ 
+  if (result < 0)
+    {
+      *bytes_read = 0;
+
+      switch (errno)
+        {
+#ifdef EINTR
+          case EINTR:
+            goto retry;
+#endif
+#ifdef EAGAIN
+          case EAGAIN:
+            return G_IO_STATUS_AGAIN;
+#endif
+          default:
+            return G_IO_STATUS_ERROR;
+        }
+    }
+
+  *bytes_read = result;
+
+  return (result > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
+}
+
+void      g_io_channel_close    (GIOChannel    *channel)
+{
+	int fd = channel->fd;
+
+	close(fd);
+
+	memset(channel, 0, sizeof(channel));
+	free(channel);
+}
+
+GIOChannel* g_io_channel_unix_new    (int         fd)
+{
+	GIOChannel *channel = malloc(sizeof(GIOChannel));
+	channel->fd = fd;
+	return channel;
+}
+
+gint        g_io_channel_unix_get_fd (GIOChannel *channel)
+{
+	return channel->fd;
+}
+
+
+
+struct watch {
+	guint id;
+	GIOChannel *channel;
+	GIOCondition condition;
+	GIOFunc func;
+	gpointer user_data;
+
+	struct watch *next;
+};
+
+static struct watch watch_head = { .id = 0, .next = 0 };
+
+guint     g_io_add_watch        (GIOChannel      *channel,
+				 GIOCondition     condition,
+				 GIOFunc          func,
+				 gpointer         user_data)
+{
+	struct watch *watch = malloc(sizeof(struct watch));
+
+	watch->id = ++watch_head.id;
+	watch->channel = channel;
+	watch->condition = condition;
+	watch->func = func;
+	watch->user_data = user_data;
+
+	watch->next = watch_head.next;
+	watch_head.next = watch;
+
+	return watch->id;
+}
+
+GMainLoop *g_main_loop_new        (GMainContext *context,
+			    	   gboolean      is_running)
+{
+	GMainLoop *ml = malloc(sizeof(GMainLoop));
+
+	ml->bail = 0;
+
+	return ml;
+}
+
+void       g_main_loop_run        (GMainLoop    *loop)
+{
+	int open_max = sysconf(_SC_OPEN_MAX);
+	struct pollfd *ufds = malloc(open_max * sizeof(struct pollfd));
+
+	while (!loop->bail) {
+		int nfds, rc, i;
+		struct watch *p, *w;
+
+		nfds = 0;
+		for (w = watch_head.next; w != NULL; w = w->next) {
+			ufds[nfds].fd = w->channel->fd;
+			ufds[nfds].events = w->condition;
+			ufds[nfds].revents = 0;
+			nfds++;
+		}
+		
+		rc = poll(ufds, nfds, -1);
+
+		if (rc < 0 && (errno == EINTR))
+			continue;
+
+		if (rc < 0) {
+			perror("poll");
+			continue;
+		}
+		
+		p = &watch_head;
+		w = watch_head.next;
+		i = 0;
+		while (w) {
+			if (ufds[i].revents) {
+				gboolean keep = w->func(w->channel, ufds[i].revents, w->user_data);
+				if (!keep) {
+					 p->next = w->next;
+					 memset(w, 0, sizeof(*w));
+					 w = p->next;
+					 i++;
+					 continue;
+				}
+			}	
+		
+			p = w;
+			w = w->next;
+			i++;
+		}
+
+	}
+}
+
+void       g_main_loop_quit       (GMainLoop    *loop)
+{
+	loop->bail = 1;
+}