Add string trim function replacements.

libs/string/trim.h

@@ -0,0 +1,128 @@
+#pragma once
+
+#include <string>
+
+namespace string
+{
+
+/**
+* Removes all characters from the beginning of the string matching the given predicate,
+* modifying the given string in-place.
+*/
+template<typename Predicate>
+inline void trim_left_if(std::string& subject, Predicate predicate)
+{
+	// Erase everything from the beginning up to the first character 
+	// that is not matching the predicate (e.g. is not a space)
+	subject.erase(subject.begin(), 
+		std::find_if(subject.begin(), subject.end(), [&](int ch) { return !predicate(ch); }));
+}
+
+/**
+* Removes all characters from the end of the string matching the given predicate,
+* modifying the given string in-place.
+*/
+template<typename Predicate>
+inline void trim_right_if(std::string& subject, Predicate predicate)
+{
+	// Erase everything from the end up to the nearest-to-last character 
+	// that is not matching the predicate (e.g. is not a space)
+	subject.erase(
+		std::find_if(subject.rbegin(), subject.rend(), [&](int ch) { return !predicate(ch); }).base(),
+		subject.end());
+}
+
+/**
+* Removes all characters from the beginning and the end of the string 
+* matching the given predicate, returning a new string containing of the result.
+*/
+template<typename Predicate>
+inline std::string trim_copy_if(std::string subject, Predicate predicate)
+{
+	trim_left_if(subject, predicate);
+	trim_right_if(subject, predicate);
+
+	return subject;
+}
+
+/**
+* Removes all space characters from the beginning and the end of the string, in-place.
+*/
+inline void trim(std::string& subject)
+{
+	trim_left_if(subject, ::isspace);
+	trim_right_if(subject, ::isspace);
+}
+
+/**
+* Removes all space characters from the beginning and the end of the string
+* and returns a new string containing of the result.
+*/
+inline std::string trim_copy(std::string subject)
+{
+	trim_left_if(subject, ::isspace);
+	trim_right_if(subject, ::isspace);
+
+	return subject;
+}
+
+/**
+* Removes all of the given characters from the beginning and the end of the subject, in-place.
+*/
+inline void trim(std::string& subject, const std::string& charsToBeRemoved)
+{
+	trim_left_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+	trim_right_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+}
+
+/**
+* Removes all of the given characters from the beginning and the end of the subject, 
+* returning a new string containing the result.
+*/
+inline std::string trim_copy(std::string subject, const std::string& charsToBeRemoved)
+{
+	trim_left_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+	trim_right_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+
+	return subject;
+}
+
+/**
+* Removes all of the given characters from the beginning of the subject, in-place
+*/
+inline void trim_left(std::string& subject, const std::string& charsToBeRemoved)
+{
+	trim_left_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+}
+
+/**
+* Removes all of the given characters from the beginning of the subject,
+* returning a new string containing the result.
+*/
+inline std::string trim_left_copy(std::string subject, const std::string& charsToBeRemoved)
+{
+	trim_left_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+
+	return subject;
+}
+
+/**
+* Removes all of the given characters from the end of the subject, in-place
+*/
+inline void trim_right(std::string& subject, const std::string& charsToBeRemoved)
+{
+	trim_right_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+}
+
+/**
+* Removes all of the given characters from the end of the subject,
+* returning a new string containing the result.
+*/
+inline std::string trim_right_copy(std::string subject, const std::string& charsToBeRemoved)
+{
+	trim_right_if(subject, [&](int ch) { return charsToBeRemoved.find(ch) != std::string::npos; });
+
+	return subject;
+}
+
+}

tools/msvc/libs.vcxproj

@@ -204,6 +204,7 @@
     <ClInclude Include="..\..\libs\string\replace.h" />
     <ClInclude Include="..\..\libs\string\split.h" />
     <ClInclude Include="..\..\libs\string\string.h" />
+    <ClInclude Include="..\..\libs\string\trim.h" />
     <ClInclude Include="..\..\libs\SurfaceShader.h" />
     <ClInclude Include="..\..\libs\texturelib.h" />
     <ClInclude Include="..\..\libs\ThreadedDefLoader.h" />

tools/msvc/libs.vcxproj.filters

@@ -169,6 +169,9 @@
     <ClInclude Include="..\..\libs\string\split.h">
       <Filter>string</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\libs\string\trim.h">
+      <Filter>string</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="util">