Removed comment header, minor cleanup

src/string_utils.cpp

@@ -1,11 +1,3 @@
-/*
- *  string_utils.cpp
- *
- *  Created by Bob Polis on 14-11-2014.
- *  Copyright 2014 Thalictrum. All rights reserved.
- *
- */
-
 #include "string_utils.hpp"
 #include <libscerror.hpp>
 #include <sys/stat.h>
@@ -14,6 +6,8 @@
 #include <cerrno>
 #include <fstream>
 #include <algorithm>
+#include <locale>
+
 using namespace std;
 
 vector<string> sc::split(const string& str, const string& sep)
@@ -158,8 +152,7 @@ void sc::create_dir(const string &path, int mode)
 
 string sc::dirname(const string& path) {
     string result {path};
-    vector<char> buf;
-    buf.resize(PATH_MAX);
+    vector<char> buf(PATH_MAX);
     if (::realpath(path.c_str(), buf.data())) {
         result = buf.data();
     }
@@ -225,18 +218,18 @@ string sc::truncate(const string& str, unsigned int maxlen, int /*how*/) {
 }
 
 string sc::lowercase(const string& str, const locale& loc) {
-    string result;
-    for (const char c : str) {
-        result += tolower(c, loc);
-    }
+    string result {str};
+    transform(result.cbegin(), result.cend(),
+              result.begin(),
+              [&loc](char c) { return tolower(c, loc); });
     return result;
 }
 
 string sc::uppercase(const string& str, const locale& loc) {
-    string result;
-    for (const char c : str) {
-        result += toupper(c, loc);
-    }
+    string result {str};
+    transform(result.cbegin(), result.cend(),
+              result.begin(),
+              [&loc](char c) { return toupper(c, loc); });
     return result;
 }
 
@@ -264,8 +257,7 @@ bool sc::is_valid_utf8(const string& str) {
 }
 
 string sc::real_path(const string& path) {
-    vector<char> buf;
-    buf.resize(PATH_MAX);
+    vector<char> buf(PATH_MAX);
     if (::realpath(path.c_str(), buf.data())) {
         return string(buf.data());
     }
@@ -273,8 +265,7 @@ string sc::real_path(const string& path) {
 }
 
 string sc::remove_accents(const string& text) {
-    vector<char> buf;
-    buf.resize(text.size() * 2);
+    vector<char> buf(text.size() * 2);
     size_t bufsize {buf.size()};
     u8_normalize(UNINORM_NFD,
                  reinterpret_cast<const uint8_t*>(text.data()),