From 1fbf3f2d48df27d028d76fa4ff2c199da347f52c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20K=C3=A4fer?= <mail@kkaefer.com>
Date: Thu, 7 Jun 2018 13:01:38 +0200
Subject: [test] standardize on database file name and move I/O functions to
 util

---
 src/mbgl/util/io.cpp | 21 +++++++++++++++++++--
 src/mbgl/util/io.hpp |  4 ++--
 2 files changed, 21 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/mbgl/util/io.cpp b/src/mbgl/util/io.cpp
index 058cd0d202..c84634ac88 100644
--- a/src/mbgl/util/io.cpp
+++ b/src/mbgl/util/io.cpp
@@ -2,6 +2,7 @@
 
 #include <cstdio>
 #include <cerrno>
+#include <cstring>
 #include <iostream>
 #include <sstream>
 #include <fstream>
@@ -9,6 +10,10 @@
 namespace mbgl {
 namespace util {
 
+IOException::IOException(int err, const std::string& msg)
+    : std::runtime_error(msg + ": " + std::strerror(errno)), code(err) {
+}
+
 void write_file(const std::string &filename, const std::string &data) {
     FILE *fd = fopen(filename.c_str(), "wb");
     if (fd) {
@@ -42,9 +47,21 @@ optional<std::string> readFile(const std::string &filename) {
 
 void deleteFile(const std::string& filename) {
     const int ret = std::remove(filename.c_str());
-    if (ret != 0) {
-        throw IOException(errno, "failed to unlink file");
+    if (ret != 0 && errno != ENOENT) {
+        throw IOException(errno, "Could not delete file " + filename);
+    }
+}
+
+void copyFile(const std::string& destination, const std::string& source) {
+    std::ifstream src(source, std::ios::binary);
+    if (!src.good()) {
+        throw IOException(errno, "Cannot read file " + destination);
+    }
+    std::ofstream dst(destination, std::ios::binary);
+    if (!dst.good()) {
+        throw IOException(errno, "Cannot write file " + destination);
     }
+    dst << src.rdbuf();
 }
 
 } // namespace util
diff --git a/src/mbgl/util/io.hpp b/src/mbgl/util/io.hpp
index 847271acf0..e628e82124 100644
--- a/src/mbgl/util/io.hpp
+++ b/src/mbgl/util/io.hpp
@@ -9,8 +9,7 @@ namespace mbgl {
 namespace util {
 
 struct IOException : std::runtime_error {
-    IOException(int err, const char* msg) : std::runtime_error(msg), code(err) {
-    }
+    IOException(int err, const std::string& msg);
     const int code = 0;
 };
 
@@ -19,6 +18,7 @@ std::string read_file(const std::string &filename);
 
 optional<std::string> readFile(const std::string &filename);
 void deleteFile(const std::string& filename);
+void copyFile(const std::string& destination, const std::string& source);
 
 } // namespace util
 } // namespace mbgl
-- 
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