Remove "using namespace std;" from zippy-stubs-internal.h.

This makes it easier to build zippy, as some compiles require a warning
suppression to accept "using namespace std".

snappy-stubs-internal.h

@@ -59,10 +59,6 @@
 #define MAP_ANONYMOUS MAP_ANON
 #endif
 
-// Pull in std::min, std::ostream, and the likes. This is safe because this
-// header file is never used from any public header files.
-using namespace std;
-
 // The size of an array, if known at compile-time.
 // Will give unexpected results if used on a pointer.
 // We undefine it first, since some compilers already have a definition.

snappy-test.cc

@@ -201,7 +201,7 @@ void Benchmark::Run() {
     if (benchmark_real_time_us > 0) {
       num_iterations = 200000 * kCalibrateIterations / benchmark_real_time_us;
     }
-    num_iterations = max(num_iterations, kCalibrateIterations);
+    num_iterations = std::max(num_iterations, kCalibrateIterations);
     BenchmarkRun benchmark_runs[kNumRuns];
 
     for (int run = 0; run < kNumRuns; ++run) {
@@ -217,7 +217,7 @@ void Benchmark::Run() {
     string heading = StringPrintf("%s/%d", name_.c_str(), test_case_num);
     string human_readable_speed;
 
-    nth_element(benchmark_runs,
+    std::nth_element(benchmark_runs,
                      benchmark_runs + kMedianPos,
                      benchmark_runs + kNumRuns,
                      BenchmarkCompareCPUTime());
@@ -523,8 +523,8 @@ int ZLib::UncompressAtMostOrAll(Bytef *dest, uLongf *destLen,
     LOG(WARNING)
       << "UncompressChunkOrAll: Received some extra data, bytes total: "
       << uncomp_stream_.avail_in << " bytes: "
-      << string(reinterpret_cast<const char *>(uncomp_stream_.next_in),
-                min(int(uncomp_stream_.avail_in), 20));
+      << std::string(reinterpret_cast<const char *>(uncomp_stream_.next_in),
+                     std::min(int(uncomp_stream_.avail_in), 20));
     UncompressErrorInit();
     return Z_DATA_ERROR;       // what's the extra data for?
   } else if (err != Z_OK && err != Z_STREAM_END && err != Z_BUF_ERROR) {

snappy-test.h

@@ -138,7 +138,8 @@ namespace file {
     void CheckSuccess() { }
   };
 
-  DummyStatus GetContents(const string& filename, string* data, int unused) {
+  DummyStatus GetContents(
+      const std::string& filename, std::string* data, int unused) {
     FILE* fp = fopen(filename.c_str(), "rb");
     if (fp == NULL) {
       perror(filename.c_str());
@@ -153,7 +154,7 @@ namespace file {
         perror("fread");
         exit(1);
       }
-      data->append(string(buf, ret));
+      data->append(std::string(buf, ret));
     }
 
     fclose(fp);
@@ -161,8 +162,8 @@ namespace file {
     return DummyStatus();
   }
 
-  DummyStatus SetContents(const string& filename,
-                          const string& str,
+  DummyStatus SetContents(const std::string& filename,
+                          const std::string& str,
                           int unused) {
     FILE* fp = fopen(filename.c_str(), "wb");
     if (fp == NULL) {
@@ -529,15 +530,15 @@ class LogMessage {
  public:
   LogMessage() { }
   ~LogMessage() {
-    cerr << endl;
+    std::cerr << std::endl;
   }
 
   LogMessage& operator<<(const std::string& msg) {
-    cerr << msg;
+    std::cerr << msg;
     return *this;
   }
   LogMessage& operator<<(int x) {
-    cerr << x;
+    std::cerr << x;
     return *this;
   }
 };
@@ -560,7 +561,7 @@ class LogMessageCrash : public LogMessage {
  public:
   LogMessageCrash() { }
   ~LogMessageCrash() {
-    cerr << endl;
+    std::cerr << std::endl;
     abort();
   }
 };

snappy.cc

@@ -765,7 +765,7 @@ bool SnappyDecompressor::RefillTag() {
       size_t length;
       const char* src = reader_->Peek(&length);
       if (length == 0) return false;
-      uint32 to_add = min<uint32>(needed - nbuf, length);
+      uint32 to_add = std::min<uint32>(needed - nbuf, length);
       memcpy(scratch_ + nbuf, src, to_add);
       nbuf += to_add;
       reader_->Skip(to_add);
@@ -837,7 +837,7 @@ size_t Compress(Source* reader, Sink* writer) {
     size_t fragment_size;
     const char* fragment = reader->Peek(&fragment_size);
     assert(fragment_size != 0);  // premature end of input
-    const size_t num_to_read = min(N, kBlockSize);
+    const size_t num_to_read = std::min(N, kBlockSize);
     size_t bytes_read = fragment_size;
 
     size_t pending_advance = 0;
@@ -858,7 +858,7 @@ size_t Compress(Source* reader, Sink* writer) {
 
       while (bytes_read < num_to_read) {
         fragment = reader->Peek(&fragment_size);
-        size_t n = min<size_t>(fragment_size, num_to_read - bytes_read);
+        size_t n = std::min<size_t>(fragment_size, num_to_read - bytes_read);
         memcpy(scratch + bytes_read, fragment, n);
         bytes_read += n;
         reader->Skip(n);
@@ -1360,7 +1360,7 @@ bool SnappyScatteredWriter<Allocator>::SlowAppend(const char* ip, size_t len) {
     }
 
     // Make new block
-    size_t bsize = min<size_t>(kBlockSize, expected_ - full_size_);
+    size_t bsize = std::min<size_t>(kBlockSize, expected_ - full_size_);
     op_base_ = allocator_.Allocate(bsize);
     op_ptr_ = op_base_;
     op_limit_ = op_base_ + bsize;
@@ -1417,7 +1417,7 @@ class SnappySinkAllocator {
     size_t size_written = 0;
     size_t block_size;
     for (int i = 0; i < blocks_.size(); ++i) {
-      block_size = min<size_t>(blocks_[i].size, size - size_written);
+      block_size = std::min<size_t>(blocks_[i].size, size - size_written);
       dest_->AppendAndTakeOwnership(blocks_[i].data, block_size,
                                     &SnappySinkAllocator::Deleter, NULL);
       size_written += block_size;

snappy_unittest.cc

@@ -399,7 +399,7 @@ static void Measure(const char* data,
     std::vector<string> output(num_blocks);
     for (int b = 0; b < num_blocks; b++) {
       int input_start = b * block_size;
-      int input_limit = min<int>((b+1)*block_size, length);
+      int input_limit = std::min<int>((b+1)*block_size, length);
       input[b] = data+input_start;
       input_length[b] = input_limit-input_start;
 
@@ -470,7 +470,7 @@ static void Measure(const char* data,
          x.c_str(),
          block_size/(1<<20),
          static_cast<int>(length), static_cast<uint32>(compressed_size),
-         (compressed_size * 100.0) / max<int>(1, length),
+         (compressed_size * 100.0) / std::max<int>(1, length),
          comp_rate,
          urate.c_str());
 }
@@ -1307,7 +1307,7 @@ static void MeasureFile(const char* fname) {
   int start_len = (FLAGS_start_len < 0) ? fullinput.size() : FLAGS_start_len;
   int end_len = fullinput.size();
   if (FLAGS_end_len >= 0) {
-    end_len = min<int>(fullinput.size(), FLAGS_end_len);
+    end_len = std::min<int>(fullinput.size(), FLAGS_end_len);
   }
   for (int len = start_len; len <= end_len; len++) {
     const char* const input = fullinput.data();