Use size_t more consistently for packet/payload lengths.

See design doc at https://docs.google.com/a/chromium.org/document/d/1I6nmE9D_BmCY-IoV6MDPY2V6WYpEI-dg2apWXTfZyUI/edit?usp=sharing for more information.

This CL was reviewed and approved in pieces in the following CLs:
https://webrtc-codereview.appspot.com/24209004/
https://webrtc-codereview.appspot.com/24229004/
https://webrtc-codereview.appspot.com/24259004/
https://webrtc-codereview.appspot.com/25109004/
https://webrtc-codereview.appspot.com/26099004/
https://webrtc-codereview.appspot.com/27069004/
https://webrtc-codereview.appspot.com/27969004/
https://webrtc-codereview.appspot.com/27989004/
https://webrtc-codereview.appspot.com/29009004/
https://webrtc-codereview.appspot.com/30929004/
https://webrtc-codereview.appspot.com/30939004/
https://webrtc-codereview.appspot.com/31999004/
Committing as TBR to the original reviewers.

BUG=chromium:81439
TEST=none
TBR=pthatcher,henrik.lundin,tina.legrand,stefan,tkchin,glaznev,kjellander,perkj,mflodman,henrika,asapersson,niklas.enbom

Review URL: https://webrtc-codereview.appspot.com/23129004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7726 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/main/test/RTPFile.cc b/webrtc/modules/audio_coding/main/test/RTPFile.cc
index b7f587b..6f0c74e 100644
--- a/webrtc/modules/audio_coding/main/test/RTPFile.cc
+++ b/webrtc/modules/audio_coding/main/test/RTPFile.cc
@@ -11,6 +11,7 @@
 #include "RTPFile.h"
 
 #include <stdlib.h>
+#include <limits>
 
 #ifdef WIN32
 #   include <Winsock2.h>
@@ -60,7 +61,7 @@
 }
 
 RTPPacket::RTPPacket(uint8_t payloadType, uint32_t timeStamp, int16_t seqNo,
-                     const uint8_t* payloadData, uint16_t payloadSize,
+                     const uint8_t* payloadData, size_t payloadSize,
                      uint32_t frequency)
     : payloadType(payloadType),
       timeStamp(timeStamp),
@@ -87,7 +88,7 @@
 
 void RTPBuffer::Write(const uint8_t payloadType, const uint32_t timeStamp,
                       const int16_t seqNo, const uint8_t* payloadData,
-                      const uint16_t payloadSize, uint32_t frequency) {
+                      const size_t payloadSize, uint32_t frequency) {
   RTPPacket *packet = new RTPPacket(payloadType, timeStamp, seqNo, payloadData,
                                     payloadSize, frequency);
   _queueRWLock->AcquireLockExclusive();
@@ -95,8 +96,8 @@
   _queueRWLock->ReleaseLockExclusive();
 }
 
-uint16_t RTPBuffer::Read(WebRtcRTPHeader* rtpInfo, uint8_t* payloadData,
-                         uint16_t payloadSize, uint32_t* offset) {
+size_t RTPBuffer::Read(WebRtcRTPHeader* rtpInfo, uint8_t* payloadData,
+                       size_t payloadSize, uint32_t* offset) {
   _queueRWLock->AcquireLockShared();
   RTPPacket *packet = _rtpQueue.front();
   _rtpQueue.pop();
@@ -143,21 +144,11 @@
   fprintf(_rtpFile, "#!RTPencode%s\n", "1.0");
   uint32_t dummy_variable = 0;
   // should be converted to network endian format, but does not matter when 0
-  if (fwrite(&dummy_variable, 4, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(&dummy_variable, 4, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(&dummy_variable, 4, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(&dummy_variable, 2, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(&dummy_variable, 2, 1, _rtpFile) != 1) {
-    return;
-  }
+  EXPECT_EQ(1u, fwrite(&dummy_variable, 4, 1, _rtpFile));
+  EXPECT_EQ(1u, fwrite(&dummy_variable, 4, 1, _rtpFile));
+  EXPECT_EQ(1u, fwrite(&dummy_variable, 4, 1, _rtpFile));
+  EXPECT_EQ(1u, fwrite(&dummy_variable, 2, 1, _rtpFile));
+  EXPECT_EQ(1u, fwrite(&dummy_variable, 2, 1, _rtpFile));
   fflush(_rtpFile);
 }
 
@@ -180,35 +171,26 @@
 
 void RTPFile::Write(const uint8_t payloadType, const uint32_t timeStamp,
                     const int16_t seqNo, const uint8_t* payloadData,
-                    const uint16_t payloadSize, uint32_t frequency) {
+                    const size_t payloadSize, uint32_t frequency) {
   /* write RTP packet to file */
   uint8_t rtpHeader[12];
   MakeRTPheader(rtpHeader, payloadType, seqNo, timeStamp, 0);
-  uint16_t lengthBytes = htons(12 + payloadSize + 8);
-  uint16_t plen = htons(12 + payloadSize);
+  ASSERT_LE(12 + payloadSize + 8, std::numeric_limits<u_short>::max());
+  uint16_t lengthBytes = htons(static_cast<u_short>(12 + payloadSize + 8));
+  uint16_t plen = htons(static_cast<u_short>(12 + payloadSize));
   uint32_t offsetMs;
 
   offsetMs = (timeStamp / (frequency / 1000));
   offsetMs = htonl(offsetMs);
-  if (fwrite(&lengthBytes, 2, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(&plen, 2, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(&offsetMs, 4, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(rtpHeader, 12, 1, _rtpFile) != 1) {
-    return;
-  }
-  if (fwrite(payloadData, 1, payloadSize, _rtpFile) != payloadSize) {
-    return;
-  }
+  EXPECT_EQ(1u, fwrite(&lengthBytes, 2, 1, _rtpFile));
+  EXPECT_EQ(1u, fwrite(&plen, 2, 1, _rtpFile));
+  EXPECT_EQ(1u, fwrite(&offsetMs, 4, 1, _rtpFile));
+  EXPECT_EQ(1u, fwrite(&rtpHeader, 12, 1, _rtpFile));
+  EXPECT_EQ(payloadSize, fwrite(payloadData, 1, payloadSize, _rtpFile));
 }
 
-uint16_t RTPFile::Read(WebRtcRTPHeader* rtpInfo, uint8_t* payloadData,
-                       uint16_t payloadSize, uint32_t* offset) {
+size_t RTPFile::Read(WebRtcRTPHeader* rtpInfo, uint8_t* payloadData,
+                     size_t payloadSize, uint32_t* offset) {
   uint16_t lengthBytes;
   uint16_t plen;
   uint8_t rtpHeader[12];
@@ -237,7 +219,7 @@
   if (lengthBytes < 20) {
     return 0;
   }
-  if (payloadSize < (lengthBytes - 20)) {
+  if (payloadSize < static_cast<size_t>((lengthBytes - 20))) {
     return 0;
   }
   lengthBytes -= 20;