From ff3476b277f9765bd4fab9d396498b6770a7f436 Mon Sep 17 00:00:00 2001
From: bruceperens <bruceperens@01035d8c-6547-0410-b346-abe4f91aad63>
Date: Fri, 18 Apr 2014 00:57:39 +0000
Subject: [PATCH] Add first test program for Linux event interface. This is not
 yet a full driver, it's just pieces we would need for a driver.

git-svn-id: https://svn.code.sf.net/p/freetel/code@1498 01035d8c-6547-0410-b346-abe4f91aad63
---
 .../source/platform/linux/test_evdev.c        | 76 +++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 freedv-server/source/platform/linux/test_evdev.c

diff --git a/freedv-server/source/platform/linux/test_evdev.c b/freedv-server/source/platform/linux/test_evdev.c
new file mode 100644
index 00000000..1409ae25
--- /dev/null
+++ b/freedv-server/source/platform/linux/test_evdev.c
@@ -0,0 +1,76 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <linux/input.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+
+#define BITS_PER_LONG (sizeof(long) * 8)
+#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
+#define OFF(x)  ((x)%BITS_PER_LONG)
+#define BIT(x)  (1UL<<OFF(x))
+#define LONG(x) ((x)/BITS_PER_LONG)
+#define test_bit(bit, array)	((array[LONG(bit)] >> OFF(bit)) & 1)
+
+process_device(const char * device_name, int fd)
+{
+  char name[256];
+  char address[256];
+  uint8_t event_bits[(EV_MAX + 7) / 8];
+  int length;
+
+  if ( ioctl(fd, EVIOCGNAME(sizeof(name)), name) < 0
+  ||   ioctl(fd, EVIOCGPHYS(sizeof(address)), address) < 0
+  ||   ioctl(fd, EVIOCGBIT(0, sizeof(event_bits)), event_bits) < 0 ) {
+      perror(device_name);
+  }
+  else {
+    char unique[256];
+    int got_unique = ioctl(fd, EVIOCGUNIQ(sizeof(unique)), unique) >= 0;
+
+    char * s = name;
+    while ( *s != 0 ) {
+      if ( *s == ' ' && s[1] == ' ' ) {
+        s++;
+        char * end = s;
+        while ( *end == ' ' )
+          end++;
+        memmove(s, end, strlen(end) + 1);
+      }
+      s++;
+    }
+    length = strlen(name);
+
+    if ( length > 1 && name[length - 1] == ' ' )
+      name[length - 1] = '\0';
+
+    if ( test_bit(EV_KEY, event_bits) ) {
+      printf("\"evdev:%s", name);
+      if ( got_unique && unique[0] != '\0' && unique[0] != ' ' )
+      printf(" %s", unique);
+      printf(" at %s\"\n", address);
+    }
+  }
+}
+
+int
+main(int argc, char * * argv)
+{
+  int i;
+  for ( i = 0; i < 1024; i++ ) {
+    char	name[100];
+
+    sprintf(name, "/dev/input/event%d", i);
+
+    int	fd = open(name, O_RDONLY);
+    if ( fd >= 0 ) {
+      process_device(name, fd);
+      close(fd);
+    }
+  }
+  return 0;
+}
-- 
2.25.1