LogDog: Add log rendering view.

client/cmd/logdog_cat/coordinatorSource.go

Index: client/cmd/logdog_cat/coordinatorSource.go
diff --git a/client/cmd/logdog_cat/coordinatorSource.go b/client/cmd/logdog_cat/coordinatorSource.go
index 394eaca455eac05eff9bb5114215d641e46342ed..64494cce9d3a26db1655a19903a77e4161cfe75a 100644
--- a/client/cmd/logdog_cat/coordinatorSource.go
+++ b/client/cmd/logdog_cat/coordinatorSource.go
@@ -6,6 +6,7 @@ package main
 
 import (
 	"errors"
+	"math"
 	"sync"
 	"time"
 
@@ -42,7 +43,16 @@ func (s *coordinatorSource) LogEntries(c context.Context, req *fetcher.LogReques
 	s.Lock()
 	defer s.Unlock()
 
-	p := coordinator.NewGetParams().Limit(int(req.Bytes), req.Count).Index(req.Index)
+	// Limit our constraints to int32.
+	bytes, count := req.Bytes, req.Count
+	if bytes > math.MaxInt32 {
+		bytes = math.MaxInt32
+	}

[Ryan Tseng, 2016/02/08 22:56:55]

log warning?

[dnj (Google), 2016/02/09 02:50:03]

No need. The "bytes" and "count" parameters are permitted to be internally
reduced as an implementation detail. The supplied parameters are just maximums.

+	if count > math.MaxInt32 {
+		count = math.MaxInt32
+	}
+
+	p := coordinator.NewGetParams().Limit(int32(bytes), int32(count)).Index(req.Index)
 
 	// If we haven't terminated, use this opportunity to fetch/update our stream
 	// state.