Expose Env::GetTempDirectory() for use in C test.

This removes the use of the non-portable headers <sys/types.h> and <unistd.h> in c_test.c.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=188503102

1 files changed, 12 insertions, 1 deletions

diff --git a/db/c.cc b/db/c.cc
index d242385..0ccf08c 100644
--- a/db/c.cc
+++ b/db/c.cc
@@ -5,7 +5,6 @@
 #include "leveldb/c.h"
 
 #include <stdlib.h>
-#include <unistd.h>
 #include "leveldb/cache.h"
 #include "leveldb/comparator.h"
 #include "leveldb/db.h"
@@ -584,6 +583,18 @@ void leveldb_env_destroy(leveldb_env_t* env) {
   delete env;
 }
 
+char* leveldb_env_get_test_directory(leveldb_env_t* env) {
+  std::string result;
+  if (!env->rep->GetTestDirectory(&result).ok()) {
+    return NULL;
+  }
+
+  char* buffer = static_cast<char*>(malloc(result.size() + 1));
+  memcpy(buffer, result.data(), result.size());
+  buffer[result.size()] = '\0';
+  return buffer;
+}
+
 void leveldb_free(void* ptr) {
   free(ptr);
 }