From abec4838d2536812a4fe382334a1c9f500f7728b Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Tue, 17 Dec 2013 17:41:53 +0100
Subject: updates in new file input

---
 src/inputs/Input.h       |  5 +++--
 src/inputs/InputFile.cpp | 40 +++++++++++++++++++++++++++++++++++++++-
 src/inputs/InputTest.cpp |  2 +-
 3 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/src/inputs/Input.h b/src/inputs/Input.h
index 943b498..42c2ef7 100644
--- a/src/inputs/Input.h
+++ b/src/inputs/Input.h
@@ -51,7 +51,6 @@ class InputBase {
 
         virtual int Close();
         virtual int Clean(); // TODO destructor
-        virtual int Rewind();
 };
 
 /********************************************/
@@ -69,7 +68,6 @@ class InputTest : InputBase {
         int SetBitrate(int bitrate);
         int Close();
         int Clean();
-        int Rewind();
 
     private:
         unsigned long counter;
@@ -91,6 +89,7 @@ class InputFile : InputBase {
         int Close();
         int Rewind();
     protected:
+        long ReadData(void* data, size_t size, unsigned int tries);
         std::string filename;
         int file; // the file descriptor
 };
@@ -119,3 +118,5 @@ class InputDabplusFile : InputFile {
 
 #endif
 
+#endif
+
diff --git a/src/inputs/InputFile.cpp b/src/inputs/InputFile.cpp
index 3701584..58c3ada 100644
--- a/src/inputs/InputFile.cpp
+++ b/src/inputs/InputFile.cpp
@@ -25,7 +25,7 @@
    along with CRC-DabMux.  If not, see <http://www.gnu.org/licenses/>.
    */
 
-#include "inputs/InputFile.h"
+#include "inputs/Input.h"
 
 #include <string>
 #include <cstdlib>
@@ -50,6 +50,44 @@ int InputFile::Open()
     return 0;
 }
 
+/**
+ *  This function replace the read function by trying many times a reading.
+ *  It tries to read until all bytes are read. Very useful when reading from a
+ *  pipe because sometimes 2 pass is necessary to read all bytes.
+ *  @param file     File descriptor.
+ *  @param data     Address of the buffer to write data into.
+ *  @param size     Number of bytes to read.
+ *  @param tries    Max number of tries to read.
+ *  @return         Same as read function:
+ *                  Nb of bytes read.
+ *                  -1 if error.
+ */
+long InputFile::ReadData(void* data, size_t size, unsigned int tries)
+{
+    size_t result;
+    size_t offset = 0;
+    if (size == 0) return 0;
+    if (tries == 0) return 0;
+    result = read(file, data, size);
+    if (result == -1) {
+        if (errno == EAGAIN) {
+            return ReadData(data, size, tries - 1);
+        }
+        return -1;
+    }
+    offset = result;
+    size -= offset;
+    data = (char*)data + offset;
+    result = ReadData(data, size, tries - 1);
+    if (result == -1) {
+        return -1;
+    }
+    offset += result;
+    return offset;
+}
+
+
+
 int InputFile::Rewind()
 {
     return lseek(this->file, 0, SEEK_SET);
diff --git a/src/inputs/InputTest.cpp b/src/inputs/InputTest.cpp
index becd8c7..4d2881e 100644
--- a/src/inputs/InputTest.cpp
+++ b/src/inputs/InputTest.cpp
@@ -26,7 +26,7 @@
    along with CRC-DabMux.  If not, see <http://www.gnu.org/licenses/>.
    */
 
-#include "inputs/InputTest.h"
+#include "inputs/Input.h"
 
 #include <string.h>
 #ifdef _WIN32
-- 
cgit v1.2.3