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-rw-r--r--external_libs/yaml-cpp/src/conversion.cpp89
1 files changed, 89 insertions, 0 deletions
diff --git a/external_libs/yaml-cpp/src/conversion.cpp b/external_libs/yaml-cpp/src/conversion.cpp
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+++ b/external_libs/yaml-cpp/src/conversion.cpp
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+#include "yaml-cpp/conversion.h"
+#include <algorithm>
+
+////////////////////////////////////////////////////////////////
+// Specializations for converting a string to specific types
+
+namespace
+{
+ // we're not gonna mess with the mess that is all the isupper/etc. functions
+ bool IsLower(char ch) { return 'a' <= ch && ch <= 'z'; }
+ bool IsUpper(char ch) { return 'A' <= ch && ch <= 'Z'; }
+ char ToLower(char ch) { return IsUpper(ch) ? ch + 'a' - 'A' : ch; }
+
+ std::string tolower(const std::string& str)
+ {
+ std::string s(str);
+ std::transform(s.begin(), s.end(), s.begin(), ToLower);
+ return s;
+ }
+
+ template <typename T>
+ bool IsEntirely(const std::string& str, T func)
+ {
+ for(std::size_t i=0;i<str.size();i++)
+ if(!func(str[i]))
+ return false;
+
+ return true;
+ }
+
+ // IsFlexibleCase
+ // . Returns true if 'str' is:
+ // . UPPERCASE
+ // . lowercase
+ // . Capitalized
+ bool IsFlexibleCase(const std::string& str)
+ {
+ if(str.empty())
+ return true;
+
+ if(IsEntirely(str, IsLower))
+ return true;
+
+ bool firstcaps = IsUpper(str[0]);
+ std::string rest = str.substr(1);
+ return firstcaps && (IsEntirely(rest, IsLower) || IsEntirely(rest, IsUpper));
+ }
+}
+
+namespace YAML
+{
+ bool Convert(const std::string& input, bool& b)
+ {
+ // we can't use iostream bool extraction operators as they don't
+ // recognize all possible values in the table below (taken from
+ // http://yaml.org/type/bool.html)
+ static const struct {
+ std::string truename, falsename;
+ } names[] = {
+ { "y", "n" },
+ { "yes", "no" },
+ { "true", "false" },
+ { "on", "off" },
+ };
+
+ if(!IsFlexibleCase(input))
+ return false;
+
+ for(unsigned i=0;i<sizeof(names)/sizeof(names[0]);i++) {
+ if(names[i].truename == tolower(input)) {
+ b = true;
+ return true;
+ }
+
+ if(names[i].falsename == tolower(input)) {
+ b = false;
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ bool Convert(const std::string& input, _Null& /*output*/)
+ {
+ return input.empty() || input == "~" || input == "null" || input == "Null" || input == "NULL";
+ }
+}
+