From 9c7c09cd7f47bd5fd0470614232d5d7c6f5eefde Mon Sep 17 00:00:00 2001
From: Michael Jumper <zhangmaike@users.sourceforge.net>
Date: Tue, 8 Feb 2011 18:23:10 -0800
Subject: [PATCH] Removed transfer limit, improved cross-platform logging,
 added check for png_structp.

---
 libguac/include/guacio.h  |  7 ------
 libguac/include/guaclog.h |  6 ++---
 libguac/src/guacio.c      | 49 +++++----------------------------------
 libguac/src/protocol.c    | 10 ++++++++
 4 files changed, 19 insertions(+), 53 deletions(-)

diff --git a/libguac/include/guacio.h b/libguac/include/guacio.h
index 8499ea3e..da4aa8f5 100644
--- a/libguac/include/guacio.h
+++ b/libguac/include/guacio.h
@@ -79,13 +79,6 @@ typedef struct GUACIO {
      */
     char* instructionbuf;
 
-    /**
-     * The transfer limit, in kilobytes per second. If 0, there is no
-     * transfer limit. If non-zero, sleep calls are used at the end of
-     * a write to ensure output never exceeds the specified limit.
-     */
-    unsigned int transfer_limit; /* KB/sec */
-
 } GUACIO;
 
 /**
diff --git a/libguac/include/guaclog.h b/libguac/include/guaclog.h
index 22dd637a..a59c2318 100644
--- a/libguac/include/guaclog.h
+++ b/libguac/include/guaclog.h
@@ -20,16 +20,16 @@
 #ifndef _GUACLOG_H
 #define _GUACLOG_H
 
-#ifndef __MINGW32__
+#ifdef HAVE_SYSLOG_H
 
-    // Logging for UNIX
+    /* Logging for UNIX */
     #include <syslog.h>
     #define GUAC_LOG_ERROR(...) syslog(LOG_ERR,  __VA_ARGS__)
     #define GUAC_LOG_INFO(...)  syslog(LOG_INFO, __VA_ARGS__)
 
 #else
 
-    // Logging for W32
+    /* Logging for W32 */
     #define GUAC_LOG_ERROR(...) fprintf(stderr, __VA_ARGS__)
     #define GUAC_LOG_INFO(...)  fprintf(stderr, __VA_ARGS__)
 
diff --git a/libguac/src/guacio.c b/libguac/src/guacio.c
index e9f0e5b9..c0a14b8e 100644
--- a/libguac/src/guacio.c
+++ b/libguac/src/guacio.c
@@ -23,8 +23,13 @@
 #include <fcntl.h>
 #include <stdio.h>
 
-#include <time.h>
+#ifdef __MINGW32__
+#include <winsock2.h>
+#else
 #include <sys/select.h>
+#endif
+
+#include <time.h>
 #include <sys/time.h>
 
 #include "guacio.h"
@@ -48,9 +53,6 @@ GUACIO* guac_open(int fd) {
     io->instructionbuf = malloc(io->instructionbuf_size);
     io->instructionbuf_used_length = 0;
 
-    /* Set limit */
-    io->transfer_limit = 0;
-
     return io;
 
 }
@@ -64,41 +66,10 @@ void guac_close(GUACIO* io) {
 /* Write bytes, limit rate */
 ssize_t __guac_write(GUACIO* io, const char* buf, int count) {
 
-    struct timeval start, end;
     int retval;
 
     /* Write and time how long the write takes (microseconds) */
-    gettimeofday(&start, NULL);
     retval = write(io->fd, buf, count);
-    gettimeofday(&end, NULL);
-
-    if (retval < 0)
-        return retval;
-
-    if (io->transfer_limit > 0) {
-
-        suseconds_t elapsed;
-        suseconds_t required_usecs;
-
-        /* Get elapsed time */
-        elapsed = (end.tv_sec - start.tv_sec) * 1000000 + end.tv_usec - start.tv_usec;
-
-        /* Calculate how much time we must sleep */
-        required_usecs = retval * 1000 / io->transfer_limit - elapsed; /* useconds at transfer_limit KB/s*/
-
-        /* Sleep as necessary */
-        if (required_usecs > 0) {
-
-            struct timespec required_sleep;
-
-            required_sleep.tv_sec = required_usecs / 1000000;
-            required_sleep.tv_nsec = (required_usecs % 1000000) * 1000;
-
-            nanosleep(&required_sleep, NULL);
-
-        }
-
-    }
 
     return retval;
 }
@@ -136,19 +107,11 @@ ssize_t guac_write_string(GUACIO* io, const char* str) {
         /* Flush when necessary, return on error */
         if (io->written > 8188 /* sizeof(out_buf) - 4 */) {
 
-            struct timeval start, end;
-            suseconds_t elapsed;
-
-            gettimeofday(&start, NULL);
             retval = __guac_write(io, out_buf, io->written);
-            gettimeofday(&end, NULL);
 
             if (retval < 0)
                 return retval;
 
-            /* Get elapsed time */
-            elapsed = (end.tv_sec - start.tv_sec) * 1000000 + end.tv_usec - start.tv_usec;
-
             io->written = 0;
         }
 
diff --git a/libguac/src/protocol.c b/libguac/src/protocol.c
index 4d3110e6..f050a868 100644
--- a/libguac/src/protocol.c
+++ b/libguac/src/protocol.c
@@ -23,8 +23,18 @@
 #include <errno.h>
 #include <png.h>
 
+/* If png_structp not defined in png.h, try to include pngstruct.h */
+#ifndef png_structp 
+#include <pngstruct.h>
+#endif
+
 #include <sys/types.h>
+
+#ifdef __MINGW32__
+#include <winsock2.h>
+#else
 #include <sys/socket.h>
+#endif
 
 #include "guacio.h"
 #include "protocol.h"