From 8c9ca162bd703c0bfd27aed58c4bb544383c6271 Mon Sep 17 00:00:00 2001
From: Sebastian Holtermann <sebholt@xwmw.org>
Date: Sun, 14 Apr 2019 17:47:01 +0200
Subject: [PATCH] SystemTools: Optimize range loop in FindProgram method
---
SystemTools.cxx | 41 +++++++++++++++--------------------------
1 file changed, 15 insertions(+), 26 deletions(-)
diff --git a/SystemTools.cxx b/SystemTools.cxx
index 6aac690..0d03453 100644
--- a/SystemTools.cxx
+++ b/SystemTools.cxx
@@ -2894,14 +2894,13 @@ std::string SystemTools::FindProgram(const std::string& name,
// the end of it
// on windows try .com then .exe
if (name.size() <= 3 || name[name.size() - 4] != '.') {
- extensions.push_back(".com");
- extensions.push_back(".exe");
+ extensions.emplace_back(".com");
+ extensions.emplace_back(".exe");
// first try with extensions if the os supports them
- for (std::vector<std::string>::iterator i = extensions.begin();
- i != extensions.end(); ++i) {
+ for (std::string const& ext : extensions) {
tryPath = name;
- tryPath += *i;
+ tryPath += ext;
if (SystemTools::FileExists(tryPath, true)) {
return SystemTools::CollapseFullPath(tryPath);
}
@@ -2920,43 +2919,33 @@ std::string SystemTools::FindProgram(const std::string& name,
SystemTools::GetPath(path);
}
// now add the additional paths
- {
- for (std::vector<std::string>::const_iterator i = userPaths.begin();
- i != userPaths.end(); ++i) {
- path.push_back(*i);
- }
- }
+ path.reserve(path.size() + userPaths.size());
+ path.insert(path.end(), userPaths.begin(), userPaths.end());
// Add a trailing slash to all paths to aid the search process.
- {
- for (std::vector<std::string>::iterator i = path.begin(); i != path.end();
- ++i) {
- std::string& p = *i;
- if (p.empty() || p.back() != '/') {
- p += "/";
- }
+ for (std::string& p : path) {
+ if (p.empty() || p.back() != '/') {
+ p += '/';
}
}
// Try each path
- for (std::vector<std::string>::iterator p = path.begin(); p != path.end();
- ++p) {
+ for (std::string& p : path) {
#ifdef _WIN32
// Remove double quotes from the path on windows
- SystemTools::ReplaceString(*p, "\"", "");
+ SystemTools::ReplaceString(p, "\"", "");
#endif
#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
// first try with extensions
- for (std::vector<std::string>::iterator ext = extensions.begin();
- ext != extensions.end(); ++ext) {
- tryPath = *p;
+ for (std::string const& ext : extensions) {
+ tryPath = p;
tryPath += name;
- tryPath += *ext;
+ tryPath += ext;
if (SystemTools::FileExists(tryPath, true)) {
return SystemTools::CollapseFullPath(tryPath);
}
}
#endif
// now try it without them
- tryPath = *p;
+ tryPath = p;
tryPath += name;
if (SystemTools::FileExists(tryPath, true)) {
return SystemTools::CollapseFullPath(tryPath);
--
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