Encoder fixes.

* Remove default constructors.
* Initialize bit_cost in histogram.Clear().
* Check fseek result in FileSize.
* Replace malloc in BrotliFileIn constructor with "new".
* Catch bad_alloc in bro tool.

enc/brotli_bit_stream.cc

@@ -339,6 +339,7 @@ std::vector<int> MoveToFrontTransform(const std::vector<int>& v) {
   std::vector<int> result(v.size());
   for (int i = 0; i < v.size(); ++i) {
     int index = IndexOf(mtf, v[i]);
+    assert(index >= 0);
     result[i] = index;
     MoveToFront(&mtf, index);
   }

enc/command.h

@@ -90,8 +90,6 @@ static inline void GetLengthCode(int insertlen, int copylen, int distancecode,
 }
 
 struct Command {
-  Command() {}
-
   // distance_code is e.g. 0 for same-as-last short code, or 16 for offset 1.
   Command(int insertlen, int copylen, int copylen_code, int distance_code)
       : insert_len_(insertlen), copy_len_(copylen) {

enc/encode_parallel.cc

@@ -39,15 +39,15 @@ namespace brotli {
 
 namespace {
 
-void RecomputeDistancePrefixes(std::vector<Command>* cmds,
+void RecomputeDistancePrefixes(Command* cmds, int num_commands,
                                int num_direct_distance_codes,
                                int distance_postfix_bits) {
   if (num_direct_distance_codes == 0 &&
       distance_postfix_bits == 0) {
     return;
   }
-  for (int i = 0; i < cmds->size(); ++i) {
+  for (int i = 0; i < num_commands; ++i) {
-    Command* cmd = &(*cmds)[i];
+    Command* cmd = &cmds[i];
     if (cmd->copy_len_ > 0 && cmd->cmd_prefix_ >= 128) {
       PrefixEncodeCopyDistance(cmd->DistanceCode(),
                                num_direct_distance_codes,
@@ -104,7 +104,12 @@ bool WriteMetaBlockParallel(const BrotliParams& params,
   int num_literals = 0;
   int max_backward_distance = (1 << params.lgwin) - 16;
   int dist_cache[4] = { -4, -4, -4, -4 };
-  std::vector<Command> commands((input_size + 1) >> 1);
+  Command* commands = static_cast<Command*>(
+      malloc(sizeof(Command) * ((input_size + 1) >> 1)));
+  if (commands == 0) {
+    delete hashers;
+    return false;
+  }
   CreateBackwardReferences(
       input_size, input_pos,
       &input[0], mask,
@@ -114,16 +119,15 @@ bool WriteMetaBlockParallel(const BrotliParams& params,
       hash_type,
       dist_cache,
       &last_insert_len,
-      &commands[0],
+      commands,
       &num_commands,
       &num_literals);
   delete hashers;
-  commands.resize(num_commands);
   if (last_insert_len > 0) {
-    commands.push_back(Command(last_insert_len));
+    commands[num_commands++] = Command(last_insert_len);
     num_literals += last_insert_len;
   }
-  assert(!commands.empty());
+  assert(num_commands != 0);
 
   // Build the meta-block.
   MetaBlockSplit mb;
@@ -131,17 +135,17 @@ bool WriteMetaBlockParallel(const BrotliParams& params,
       params.mode == BrotliParams::MODE_FONT ? 12 : 0;
   int distance_postfix_bits = params.mode == BrotliParams::MODE_FONT ? 1 : 0;
   int literal_context_mode = utf8_mode ? CONTEXT_UTF8 : CONTEXT_SIGNED;
-  RecomputeDistancePrefixes(&commands,
+  RecomputeDistancePrefixes(commands, num_commands,
                             num_direct_distance_codes,
                             distance_postfix_bits);
   if (params.quality <= 9) {
     BuildMetaBlockGreedy(&input[0], input_pos, mask,
-                         &commands[0], commands.size(),
+                         commands, num_commands,
                          &mb);
   } else {
     BuildMetaBlock(&input[0], input_pos, mask,
                    prev_byte, prev_byte2,
-                   &commands[0], commands.size(),
+                   commands, num_commands,
                    literal_context_mode,
                    &mb);
   }
@@ -173,11 +177,13 @@ bool WriteMetaBlockParallel(const BrotliParams& params,
                       num_direct_distance_codes,
                       distance_postfix_bits,
                       literal_context_mode,
-                      &commands[0], commands.size(),
+                      commands, num_commands,
                       mb,
                       &storage_ix, &storage[0])) {
+    free(commands);
     return false;
   }
+  free(commands);
 
   // If this is not the last meta-block, store an empty metadata
   // meta-block so that the meta-block will end at a byte boundary.

enc/entropy_encode.cc

@@ -29,7 +29,6 @@ namespace brotli {
 namespace {
 
 struct HuffmanTree {
-  HuffmanTree();
   HuffmanTree(int count, int16_t left, int16_t right)
       : total_count_(count),
         index_left_(left),
@@ -40,8 +39,6 @@ struct HuffmanTree {
   int16_t index_right_or_value_;
 };
 
-HuffmanTree::HuffmanTree() {}
-
 // Sort the root nodes, least popular first.
 bool SortHuffmanTree(const HuffmanTree &v0, const HuffmanTree &v1) {
   return v0.total_count_ < v1.total_count_;

enc/histogram.h

@@ -18,6 +18,7 @@
 #define BROTLI_ENC_HISTOGRAM_H_
 
 #include <string.h>
+#include <limits>
 #include <vector>
 #include <utility>
 #include "./command.h"
@@ -38,6 +39,7 @@ struct Histogram {
   void Clear() {
     memset(data_, 0, sizeof(data_));
     total_count_ = 0;
+    bit_cost_ = std::numeric_limits<double>::infinity();
   }
   void Add(int val) {
     ++data_[val];

enc/streams.cc

@@ -89,18 +89,14 @@ const void* BrotliMemIn::Read(size_t n, size_t* output) {
 
 BrotliFileIn::BrotliFileIn(FILE* f, size_t max_read_size)
     : f_(f),
-      buf_(malloc(max_read_size)),
+      buf_(new char[max_read_size]),
       buf_size_(max_read_size) { }
 
 BrotliFileIn::~BrotliFileIn() {
-  if (buf_) free(buf_);
+  delete[] buf_;
 }
 
 const void* BrotliFileIn::Read(size_t n, size_t* bytes_read) {
-  if (buf_ == NULL) {
-    *bytes_read = 0;
-    return NULL;
-  }
   if (n > buf_size_) {
     n = buf_size_;
   } else if (n == 0) {

enc/streams.h

@@ -110,7 +110,7 @@ class BrotliFileIn : public BrotliIn {
 
  private:
   FILE* f_;
-  void* buf_;
+  char* buf_;
   size_t buf_size_;
 };
 

tools/bro.cc

@@ -177,7 +177,10 @@ int64_t FileSize(char *path) {
   if (f == NULL) {
     return -1;
   }
-  fseek(f, 0L, SEEK_END);
+  if (fseek(f, 0L, SEEK_END) != 0) {
+    fclose(f);
+    return -1;
+  }
   int64_t retval = ftell(f);
   fclose(f);
   return retval;
@@ -209,6 +212,7 @@ int main(int argc, char** argv) {
       brotli::BrotliParams params;
       params.lgwin = lgwin;
       params.quality = quality;
+      try {
         brotli::BrotliFileIn in(fin, 1 << 16);
         brotli::BrotliFileOut out(fout);
         if (!BrotliCompress(params, &in, &out)) {
@@ -216,6 +220,11 @@ int main(int argc, char** argv) {
           unlink(output_path);
           exit(1);
         }
+      } catch (std::bad_alloc&) {
+        fprintf(stderr, "not enough memory\n");
+        unlink(output_path);
+        exit(1);
+      }
     }
     if (fclose(fin) != 0) {
       perror("fclose");