merge: http://www.linuxtv.org/hg/~hverkuil/v4l-dvb-subdev2

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/v4l2-apps/libv4l/libv4lconvert/helper-funcs.h b/v4l2-apps/libv4l/libv4lconvert/helper-funcs.h
new file mode 100644
index 000000000..8ce12343c
--- /dev/null
+++ b/v4l2-apps/libv4l/libv4lconvert/helper-funcs.h
@@ -0,0 +1,79 @@
+/* Utility functions for decompression helpers
+ *
+ * Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+static int v4lconvert_helper_write(int fd, const void *b, size_t count,
+  char *progname)
+{
+  const unsigned char *buf = b;
+  size_t ret, written = 0;
+
+  while (written < count) {
+    ret = write(fd, buf + written, count - written);
+    if (ret == -1) {
+      if (errno == EINTR)
+	continue;
+
+      if (errno == EPIPE) /* Main program has quited */
+	exit(0);
+
+      fprintf(stderr, "%s: error writing: %s\n", progname, strerror(errno));
+      return -1;
+    }
+    written += ret;
+  }
+
+  return 0;
+}
+
+static int v4lconvert_helper_read(int fd, void *b, size_t count,
+  char *progname)
+{
+  unsigned char *buf = b;
+  size_t ret, r = 0;
+
+  while (r < count) {
+    ret = read(fd, buf + r, count - r);
+    if (ret == -1) {
+      if (errno == EINTR)
+	continue;
+
+      fprintf(stderr, "%s: error reading: %s\n", progname, strerror(errno));
+      return -1;
+    }
+    if (ret == 0) /* EOF */
+      exit(0);
+
+    r += ret;
+  }
+
+  return 0;
+}