]> git.lizzy.rs Git - dragonfireclient.git/blobdiff - src/settings.cpp
Don't include client/game.h on server build
[dragonfireclient.git] / src / settings.cpp
index 8bb4f5c9c43d3415344da4f3e1e78deaac035149..0e44ee0bcb6c9adbc7915d228843a8c5fd85298d 100644 (file)
@@ -20,8 +20,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "settings.h"
 #include "irrlichttypes_bloated.h"
 #include "exceptions.h"
-#include "jthread/jmutexautolock.h"
-#include "strfnd.h"
+#include "threading/mutex_auto_lock.h"
+#include "util/strfnd.h"
 #include <iostream>
 #include <fstream>
 #include <sstream>
@@ -33,20 +33,100 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <cctype>
 #include <algorithm>
 
+Settings *g_settings = nullptr;
+static SettingsHierarchy g_hierarchy;
+std::string g_settings_path;
 
-Settings::~Settings()
+std::unordered_map<std::string, const FlagDesc *> Settings::s_flags;
+
+/* Settings hierarchy implementation */
+
+SettingsHierarchy::SettingsHierarchy(Settings *fallback)
 {
-       std::map<std::string, SettingsEntry>::const_iterator it;
-       for (it = m_settings.begin(); it != m_settings.end(); ++it)
-               delete it->second.group;
+       layers.push_back(fallback);
 }
 
 
-Settings & Settings::operator += (const Settings &other)
+Settings *SettingsHierarchy::getLayer(int layer) const
 {
-       update(other);
+       if (layer < 0 || layer >= (int)layers.size())
+               throw BaseException("Invalid settings layer");
+       return layers[layer];
+}
 
-       return *this;
+
+Settings *SettingsHierarchy::getParent(int layer) const
+{
+       assert(layer >= 0 && layer < (int)layers.size());
+       // iterate towards the origin (0) to find the next fallback layer
+       for (int i = layer - 1; i >= 0; --i) {
+               if (layers[i])
+                       return layers[i];
+       }
+
+       return nullptr;
+}
+
+
+void SettingsHierarchy::onLayerCreated(int layer, Settings *obj)
+{
+       if (layer < 0)
+               throw BaseException("Invalid settings layer");
+       if ((int)layers.size() < layer + 1)
+               layers.resize(layer + 1);
+
+       Settings *&pos = layers[layer];
+       if (pos)
+               throw BaseException("Setting layer " + itos(layer) + " already exists");
+
+       pos = obj;
+       // This feels bad
+       if (this == &g_hierarchy && layer == (int)SL_GLOBAL)
+               g_settings = obj;
+}
+
+
+void SettingsHierarchy::onLayerRemoved(int layer)
+{
+       assert(layer >= 0 && layer < (int)layers.size());
+       layers[layer] = nullptr;
+       if (this == &g_hierarchy && layer == (int)SL_GLOBAL)
+               g_settings = nullptr;
+}
+
+/* Settings implementation */
+
+Settings *Settings::createLayer(SettingsLayer sl, const std::string &end_tag)
+{
+       return new Settings(end_tag, &g_hierarchy, (int)sl);
+}
+
+
+Settings *Settings::getLayer(SettingsLayer sl)
+{
+       return g_hierarchy.getLayer(sl);
+}
+
+
+Settings::Settings(const std::string &end_tag, SettingsHierarchy *h,
+               int settings_layer) :
+       m_end_tag(end_tag),
+       m_hierarchy(h),
+       m_settingslayer(settings_layer)
+{
+       if (m_hierarchy)
+               m_hierarchy->onLayerCreated(m_settingslayer, this);
+}
+
+
+Settings::~Settings()
+{
+       MutexAutoLock lock(m_mutex);
+
+       if (m_hierarchy)
+               m_hierarchy->onLayerRemoved(m_settingslayer);
+
+       clearNoLock();
 }
 
 
@@ -55,32 +135,55 @@ Settings & Settings::operator = (const Settings &other)
        if (&other == this)
                return *this;
 
-       JMutexAutoLock lock(m_mutex);
-       JMutexAutoLock lock2(other.m_mutex);
+       // TODO: Avoid copying Settings objects. Make this private.
+       FATAL_ERROR_IF(m_hierarchy || other.m_hierarchy,
+               "Cannot copy or overwrite Settings object that belongs to a hierarchy");
+
+       MutexAutoLock lock(m_mutex);
+       MutexAutoLock lock2(other.m_mutex);
 
        clearNoLock();
-       updateNoLock(other);
+       m_settings = other.m_settings;
+       m_callbacks = other.m_callbacks;
 
        return *this;
 }
 
 
-std::string Settings::sanitizeString(const std::string &value)
+bool Settings::checkNameValid(const std::string &name)
 {
-       std::string str = value;
-       for (const char *s = "\t\n\v\f\r\b =\""; *s; s++)
-               str.erase(std::remove(str.begin(), str.end(), *s), str.end());
+       bool valid = name.find_first_of("=\"{}#") == std::string::npos;
+       if (valid)
+               valid = std::find_if(name.begin(), name.end(), ::isspace) == name.end();
 
-       return str;
+       if (!valid) {
+               errorstream << "Invalid setting name \"" << name << "\""
+                       << std::endl;
+               return false;
+       }
+       return true;
 }
 
 
-std::string Settings::getMultiline(std::istream &is)
+bool Settings::checkValueValid(const std::string &value)
 {
+       if (value.substr(0, 3) == "\"\"\"" ||
+               value.find("\n\"\"\"") != std::string::npos) {
+               errorstream << "Invalid character sequence '\"\"\"' found in"
+                       " setting value!" << std::endl;
+               return false;
+       }
+       return true;
+}
+
+std::string Settings::getMultiline(std::istream &is, size_t *num_lines)
+{
+       size_t lines = 1;
        std::string value;
        std::string line;
 
        while (is.good()) {
+               lines++;
                std::getline(is, line);
                if (line == "\"\"\"")
                        break;
@@ -92,19 +195,32 @@ std::string Settings::getMultiline(std::istream &is)
        if (len)
                value.erase(len - 1);
 
+       if (num_lines)
+               *num_lines = lines;
+
        return value;
 }
 
 
-bool Settings::parseConfigLines(std::istream &is, const std::string &end)
+bool Settings::readConfigFile(const char *filename)
 {
-       JMutexAutoLock lock(m_mutex);
+       std::ifstream is(filename);
+       if (!is.good())
+               return false;
+
+       return parseConfigLines(is);
+}
+
+
+bool Settings::parseConfigLines(std::istream &is)
+{
+       MutexAutoLock lock(m_mutex);
 
        std::string line, name, value;
 
        while (is.good()) {
                std::getline(is, line);
-               SettingsParseEvent event = parseConfigObject(line, end, name, value);
+               SettingsParseEvent event = parseConfigObject(line, name, value);
 
                switch (event) {
                case SPE_NONE:
@@ -117,11 +233,12 @@ bool Settings::parseConfigLines(std::istream &is, const std::string &end)
                case SPE_END:
                        return true;
                case SPE_GROUP: {
-                       Settings *branch = new Settings;
-                       if (!branch->parseConfigLines(is, "}"))
+                       Settings *group = new Settings("}");
+                       if (!group->parseConfigLines(is)) {
+                               delete group;
                                return false;
-
-                       m_settings[name] = SettingsEntry(branch);
+                       }
+                       m_settings[name] = SettingsEntry(group);
                        break;
                }
                case SPE_MULTILINE:
@@ -130,136 +247,131 @@ bool Settings::parseConfigLines(std::istream &is, const std::string &end)
                }
        }
 
-       return end.empty();
+       // false (failure) if end tag not found
+       return m_end_tag.empty();
 }
 
 
-bool Settings::readConfigFile(const char *filename)
+void Settings::writeLines(std::ostream &os, u32 tab_depth) const
 {
-       std::ifstream is(filename);
-       if (!is.good())
-               return false;
-
-       return parseConfigLines(is, "");
-}
+       MutexAutoLock lock(m_mutex);
 
+       for (const auto &setting_it : m_settings)
+               printEntry(os, setting_it.first, setting_it.second, tab_depth);
 
-void Settings::writeLines(std::ostream &os, u32 tab_depth) const
-{
-       JMutexAutoLock lock(m_mutex);
+       // For groups this must be "}" !
+       if (!m_end_tag.empty()) {
+               for (u32 i = 0; i < tab_depth; i++)
+                       os << "\t";
 
-       for (std::map<std::string, SettingsEntry>::const_iterator
-                       it = m_settings.begin();
-                       it != m_settings.end(); ++it) {
-               bool is_multiline = it->second.value.find('\n') != std::string::npos;
-               printValue(os, it->first, it->second, is_multiline, tab_depth);
+               os << m_end_tag << "\n";
        }
 }
 
 
-void Settings::printValue(std::ostream &os, const std::string &name,
-       const SettingsEntry &entry, bool is_value_multiline, u32 tab_depth)
+void Settings::printEntry(std::ostream &os, const std::string &name,
+       const SettingsEntry &entry, u32 tab_depth)
 {
        for (u32 i = 0; i != tab_depth; i++)
                os << "\t";
-       os << name << " = ";
-
-       if (is_value_multiline)
-               os << "\"\"\"\n" << entry.value << "\n\"\"\"\n";
-       else
-               os << entry.value << "\n";
-
-       Settings *group = entry.group;
-       if (group) {
-               for (u32 i = 0; i != tab_depth; i++)
-                       os << "\t";
 
+       if (entry.is_group) {
                os << name << " = {\n";
-               group->writeLines(os, tab_depth + 1);
 
-               for (u32 i = 0; i != tab_depth; i++)
-                       os << "\t";
+               entry.group->writeLines(os, tab_depth + 1);
 
-               os << "}\n";
+               // Closing bracket handled by writeLines
+       } else {
+               os << name << " = ";
+
+               if (entry.value.find('\n') != std::string::npos)
+                       os << "\"\"\"\n" << entry.value << "\n\"\"\"\n";
+               else
+                       os << entry.value << "\n";
        }
 }
 
 
-bool Settings::updateConfigObject(std::istream &is, std::ostream &os,
-       const std::string &end, u32 tab_depth)
+bool Settings::updateConfigObject(std::istream &is, std::ostream &os, u32 tab_depth)
 {
-       std::map<std::string, SettingsEntry>::const_iterator it;
-       std::set<std::string> settings_in_config;
+       SettingEntries::const_iterator it;
+       std::set<std::string> present_entries;
+       std::string line, name, value;
        bool was_modified = false;
        bool end_found = false;
-       std::string line, name, value;
 
        // Add any settings that exist in the config file with the current value
        // in the object if existing
        while (is.good() && !end_found) {
                std::getline(is, line);
-               SettingsParseEvent event = parseConfigObject(line, end, name, value);
+               SettingsParseEvent event = parseConfigObject(line, name, value);
 
                switch (event) {
                case SPE_END:
+                       // Skip end tag. Append later.
                        end_found = true;
                        break;
-               case SPE_KVPAIR:
                case SPE_MULTILINE:
+                       value = getMultiline(is);
+                       /* FALLTHROUGH */
+               case SPE_KVPAIR:
                        it = m_settings.find(name);
-                       if (it != m_settings.end()) {
+                       if (it != m_settings.end() &&
+                                       (it->second.is_group || it->second.value != value)) {
+                               printEntry(os, name, it->second, tab_depth);
+                               was_modified = true;
+                       } else if (it == m_settings.end()) {
+                               // Remove by skipping
+                               was_modified = true;
+                               break;
+                       } else {
+                               os << line << "\n";
                                if (event == SPE_MULTILINE)
-                                       value = getMultiline(is);
-
-                               if (value != it->second.value) {
-                                       value = it->second.value;
-                                       was_modified = true;
-                               }
+                                       os << value << "\n\"\"\"\n";
                        }
-
-                       settings_in_config.insert(name);
-
-                       printValue(os, name, SettingsEntry(value),
-                               event == SPE_MULTILINE, tab_depth);
-
+                       present_entries.insert(name);
                        break;
-               case SPE_GROUP: {
-                       Settings *group = NULL;
+               case SPE_GROUP:
                        it = m_settings.find(name);
-                       if (it != m_settings.end())
-                               group = it->second.group;
-
-                       settings_in_config.insert(name);
-
-                       os << name << " = {\n";
-
-                       if (group) {
-                               was_modified |= group->updateConfigObject(is, os, "}", tab_depth + 1);
+                       if (it != m_settings.end() && it->second.is_group) {
+                               os << line << "\n";
+                               sanity_check(it->second.group != NULL);
+                               was_modified |= it->second.group->updateConfigObject(is, os, tab_depth + 1);
+                       } else if (it == m_settings.end()) {
+                               // Remove by skipping
+                               was_modified = true;
+                               Settings removed_group("}"); // Move 'is' to group end
+                               std::stringstream ss;
+                               removed_group.updateConfigObject(is, ss, tab_depth + 1);
+                               break;
                        } else {
-                               Settings dummy_settings;
-                               dummy_settings.updateConfigObject(is, os, "}", tab_depth + 1);
+                               printEntry(os, name, it->second, tab_depth);
+                               was_modified = true;
                        }
-
-                       for (u32 i = 0; i != tab_depth; i++)
-                               os << "\t";
-                       os << "}\n";
+                       present_entries.insert(name);
                        break;
-               }
                default:
                        os << line << (is.eof() ? "" : "\n");
                        break;
                }
        }
 
+       if (!line.empty() && is.eof())
+               os << "\n";
+
        // Add any settings in the object that don't exist in the config file yet
        for (it = m_settings.begin(); it != m_settings.end(); ++it) {
-               if (settings_in_config.find(it->first) != settings_in_config.end())
+               if (present_entries.find(it->first) != present_entries.end())
                        continue;
 
+               printEntry(os, it->first, it->second, tab_depth);
                was_modified = true;
+       }
 
-               bool is_multiline = it->second.value.find('\n') != std::string::npos;
-               printValue(os, it->first, it->second, is_multiline, tab_depth);
+       // Append ending tag
+       if (!m_end_tag.empty()) {
+               os << m_end_tag << "\n";
+               was_modified |= !end_found;
        }
 
        return was_modified;
@@ -268,12 +380,15 @@ bool Settings::updateConfigObject(std::istream &is, std::ostream &os,
 
 bool Settings::updateConfigFile(const char *filename)
 {
-       JMutexAutoLock lock(m_mutex);
+       MutexAutoLock lock(m_mutex);
 
        std::ifstream is(filename);
        std::ostringstream os(std::ios_base::binary);
 
-       if (!updateConfigObject(is, os, ""))
+       bool was_modified = updateConfigObject(is, os);
+       is.close();
+
+       if (!was_modified)
                return true;
 
        if (!fs::safeWriteToFile(filename, os.str())) {
@@ -318,7 +433,7 @@ bool Settings::parseCommandLine(int argc, char *argv[],
 
                ValueType type = n->second.type;
 
-               std::string value = "";
+               std::string value;
 
                if (type == VALUETYPE_FLAG) {
                        value = "true";
@@ -343,32 +458,44 @@ bool Settings::parseCommandLine(int argc, char *argv[],
  * Getters *
  ***********/
 
+Settings *Settings::getParent() const
+{
+       return m_hierarchy ? m_hierarchy->getParent(m_settingslayer) : nullptr;
+}
+
 
 const SettingsEntry &Settings::getEntry(const std::string &name) const
 {
-       JMutexAutoLock lock(m_mutex);
+       {
+               MutexAutoLock lock(m_mutex);
 
-       std::map<std::string, SettingsEntry>::const_iterator n;
-       if ((n = m_settings.find(name)) == m_settings.end()) {
-               if ((n = m_defaults.find(name)) == m_defaults.end())
-                       throw SettingNotFoundException("Setting [" + name + "] not found.");
+               SettingEntries::const_iterator n;
+               if ((n = m_settings.find(name)) != m_settings.end())
+                       return n->second;
        }
-       return n->second;
+
+       if (auto parent = getParent())
+               return parent->getEntry(name);
+
+       throw SettingNotFoundException("Setting [" + name + "] not found.");
 }
 
 
 Settings *Settings::getGroup(const std::string &name) const
 {
-       Settings *group = getEntry(name).group;
-       if (group == NULL)
+       const SettingsEntry &entry = getEntry(name);
+       if (!entry.is_group)
                throw SettingNotFoundException("Setting [" + name + "] is not a group.");
-       return group;
+       return entry.group;
 }
 
 
-std::string Settings::get(const std::string &name) const
+const std::string &Settings::get(const std::string &name) const
 {
-       return getEntry(name).value;
+       const SettingsEntry &entry = getEntry(name);
+       if (entry.is_group)
+               throw SettingNotFoundException("Setting [" + name + "] is a group.");
+       return entry.value;
 }
 
 
@@ -390,6 +517,11 @@ s16 Settings::getS16(const std::string &name) const
 }
 
 
+u32 Settings::getU32(const std::string &name) const
+{
+       return (u32) stoi(get(name));
+}
+
 s32 Settings::getS32(const std::string &name) const
 {
        return stoi(get(name));
@@ -404,11 +536,8 @@ float Settings::getFloat(const std::string &name) const
 
 u64 Settings::getU64(const std::string &name) const
 {
-       u64 value = 0;
        std::string s = get(name);
-       std::istringstream ss(s);
-       ss >> value;
-       return value;
+       return from_string<u64>(s);
 }
 
 
@@ -438,36 +567,39 @@ v3f Settings::getV3F(const std::string &name) const
 u32 Settings::getFlagStr(const std::string &name, const FlagDesc *flagdesc,
        u32 *flagmask) const
 {
-       std::string val = get(name);
-       return std::isdigit(val[0])
-               ? stoi(val)
-               : readFlagString(val, flagdesc, flagmask);
-}
-
-
-// N.B. if getStruct() is used to read a non-POD aggregate type,
-// the behavior is undefined.
-bool Settings::getStruct(const std::string &name, const std::string &format,
-       void *out, size_t olen) const
-{
-       std::string valstr;
-
-       try {
-               valstr = get(name);
-       } catch (SettingNotFoundException &e) {
-               return false;
+       u32 flags = 0;
+
+       // Read default value (if there is any)
+       if (auto parent = getParent())
+               flags = parent->getFlagStr(name, flagdesc, flagmask);
+
+       // Apply custom flags "on top"
+       if (m_settings.find(name) != m_settings.end()) {
+               std::string value = get(name);
+               u32 flags_user;
+               u32 mask_user = U32_MAX;
+               flags_user = std::isdigit(value[0])
+                       ? stoi(value) // Override default
+                       : readFlagString(value, flagdesc, &mask_user);
+
+               flags &= ~mask_user;
+               flags |=  flags_user;
+               if (flagmask)
+                       *flagmask |= mask_user;
        }
 
-       if (!deSerializeStringToStruct(valstr, format, out, olen))
-               return false;
-
-       return true;
+       return flags;
 }
 
 
 bool Settings::getNoiseParams(const std::string &name, NoiseParams &np) const
 {
-       return getNoiseParamsFromGroup(name, np) || getNoiseParamsFromValue(name, np);
+       if (getNoiseParamsFromGroup(name, np) || getNoiseParamsFromValue(name, np))
+               return true;
+       if (auto parent = getParent())
+               return parent->getNoiseParams(name, np);
+
+       return false;
 }
 
 
@@ -479,6 +611,7 @@ bool Settings::getNoiseParamsFromValue(const std::string &name,
        if (!getNoEx(name, value))
                return false;
 
+       // Format: f32,f32,(f32,f32,f32),s32,s32,f32[,f32]
        Strfnd f(value);
 
        np.offset   = stof(f.next(","));
@@ -487,9 +620,14 @@ bool Settings::getNoiseParamsFromValue(const std::string &name,
        np.spread.X = stof(f.next(","));
        np.spread.Y = stof(f.next(","));
        np.spread.Z = stof(f.next(")"));
+       f.next(",");
        np.seed     = stoi(f.next(","));
        np.octaves  = stoi(f.next(","));
-       np.persist  = stof(f.next(""));
+       np.persist  = stof(f.next(","));
+
+       std::string optional_params = f.next("");
+       if (!optional_params.empty())
+               np.lacunarity = stof(optional_params);
 
        return true;
 }
@@ -509,6 +647,11 @@ bool Settings::getNoiseParamsFromGroup(const std::string &name,
        group->getS32NoEx("seed",          np.seed);
        group->getU16NoEx("octaves",       np.octaves);
        group->getFloatNoEx("persistence", np.persist);
+       group->getFloatNoEx("lacunarity",  np.lacunarity);
+
+       np.flags = 0;
+       if (!group->getFlagStrNoEx("flags", np.flags, flagdesc_noiseparams))
+               np.flags = NOISE_FLAG_DEFAULTS;
 
        return true;
 }
@@ -516,20 +659,30 @@ bool Settings::getNoiseParamsFromGroup(const std::string &name,
 
 bool Settings::exists(const std::string &name) const
 {
-       JMutexAutoLock lock(m_mutex);
+       if (existsLocal(name))
+               return true;
+       if (auto parent = getParent())
+               return parent->exists(name);
+       return false;
+}
+
+
+bool Settings::existsLocal(const std::string &name) const
+{
+       MutexAutoLock lock(m_mutex);
 
-       return (m_settings.find(name) != m_settings.end() ||
-               m_defaults.find(name) != m_defaults.end());
+       return m_settings.find(name) != m_settings.end();
 }
 
 
 std::vector<std::string> Settings::getNames() const
 {
+       MutexAutoLock lock(m_mutex);
+
        std::vector<std::string> names;
-       for (std::map<std::string, SettingsEntry>::const_iterator
-                       i = m_settings.begin();
-                       i != m_settings.end(); ++i) {
-               names.push_back(i->first);
+       names.reserve(m_settings.size());
+       for (const auto &settings_it : m_settings) {
+               names.push_back(settings_it.first);
        }
        return names;
 }
@@ -540,17 +693,6 @@ std::vector<std::string> Settings::getNames() const
  * Getters that don't throw exceptions *
  ***************************************/
 
-bool Settings::getEntryNoEx(const std::string &name, SettingsEntry &val) const
-{
-       try {
-               val = getEntry(name);
-               return true;
-       } catch (SettingNotFoundException &e) {
-               return false;
-       }
-}
-
-
 bool Settings::getGroupNoEx(const std::string &name, Settings *&val) const
 {
        try {
@@ -615,6 +757,15 @@ bool Settings::getS16NoEx(const std::string &name, s16 &val) const
        }
 }
 
+bool Settings::getU32NoEx(const std::string &name, u32 &val) const
+{
+       try {
+               val = getU32(name);
+               return true;
+       } catch (SettingNotFoundException &e) {
+               return false;
+       }
+}
 
 bool Settings::getS32NoEx(const std::string &name, s32 &val) const
 {
@@ -660,19 +811,16 @@ bool Settings::getV3FNoEx(const std::string &name, v3f &val) const
 }
 
 
-// N.B. getFlagStrNoEx() does not set val, but merely modifies it.  Thus,
-// val must be initialized before using getFlagStrNoEx().  The intention of
-// this is to simplify modifying a flags field from a default value.
 bool Settings::getFlagStrNoEx(const std::string &name, u32 &val,
-       FlagDesc *flagdesc) const
+       const FlagDesc *flagdesc) const
 {
-       try {
-               u32 flags, flagmask;
-
-               flags = getFlagStr(name, flagdesc, &flagmask);
+       if (!flagdesc) {
+               if (!(flagdesc = getFlagDescFallback(name)))
+                       return false; // Not found
+       }
 
-               val &= ~flagmask;
-               val |=  flags;
+       try {
+               val = getFlagStr(name, flagdesc, nullptr);
 
                return true;
        } catch (SettingNotFoundException &e) {
@@ -685,118 +833,130 @@ bool Settings::getFlagStrNoEx(const std::string &name, u32 &val,
  * Setters *
  ***********/
 
-
-void Settings::set(const std::string &name, const std::string &value)
+bool Settings::setEntry(const std::string &name, const void *data,
+       bool set_group)
 {
+       if (!checkNameValid(name))
+               return false;
+       if (!set_group && !checkValueValid(*(const std::string *)data))
+               return false;
+
+       Settings *old_group = NULL;
        {
-       JMutexAutoLock lock(m_mutex);
+               MutexAutoLock lock(m_mutex);
+
+               SettingsEntry &entry = m_settings[name];
+               old_group = entry.group;
 
-       m_settings[name].value = value;
+               entry.value    = set_group ? "" : *(const std::string *)data;
+               entry.group    = set_group ? *(Settings **)data : NULL;
+               entry.is_group = set_group;
+               if (set_group)
+                       entry.group->m_end_tag = "}";
        }
-       doCallbacks(name);
+
+       delete old_group;
+
+       return true;
 }
 
 
-void Settings::setGroup(const std::string &name, Settings *group)
+bool Settings::set(const std::string &name, const std::string &value)
 {
-       JMutexAutoLock lock(m_mutex);
+       if (!setEntry(name, &value, false))
+               return false;
 
-       delete m_settings[name].group;
-       m_settings[name].group = group;
+       doCallbacks(name);
+       return true;
 }
 
 
-void Settings::setDefault(const std::string &name, const std::string &value)
+// TODO: Remove this function
+bool Settings::setDefault(const std::string &name, const std::string &value)
 {
-       JMutexAutoLock lock(m_mutex);
-
-       m_defaults[name].value = value;
+       FATAL_ERROR_IF(m_hierarchy != &g_hierarchy, "setDefault is only valid on "
+               "global settings");
+       return getLayer(SL_DEFAULTS)->set(name, value);
 }
 
 
-void Settings::setGroupDefault(const std::string &name, Settings *group)
+bool Settings::setGroup(const std::string &name, const Settings &group)
 {
-       JMutexAutoLock lock(m_mutex);
-
-       delete m_defaults[name].group;
-       m_defaults[name].group = group;
+       // Settings must own the group pointer
+       // avoid double-free by copying the source
+       Settings *copy = new Settings();
+       *copy = group;
+       return setEntry(name, &copy, true);
 }
 
 
-void Settings::setBool(const std::string &name, bool value)
+bool Settings::setBool(const std::string &name, bool value)
 {
-       set(name, value ? "true" : "false");
+       return set(name, value ? "true" : "false");
 }
 
 
-void Settings::setS16(const std::string &name, s16 value)
+bool Settings::setS16(const std::string &name, s16 value)
 {
-       set(name, itos(value));
+       return set(name, itos(value));
 }
 
 
-void Settings::setU16(const std::string &name, u16 value)
+bool Settings::setU16(const std::string &name, u16 value)
 {
-       set(name, itos(value));
+       return set(name, itos(value));
 }
 
 
-void Settings::setS32(const std::string &name, s32 value)
+bool Settings::setS32(const std::string &name, s32 value)
 {
-       set(name, itos(value));
+       return set(name, itos(value));
 }
 
 
-void Settings::setU64(const std::string &name, u64 value)
+bool Settings::setU64(const std::string &name, u64 value)
 {
        std::ostringstream os;
        os << value;
-       set(name, os.str());
+       return set(name, os.str());
 }
 
 
-void Settings::setFloat(const std::string &name, float value)
+bool Settings::setFloat(const std::string &name, float value)
 {
-       set(name, ftos(value));
+       return set(name, ftos(value));
 }
 
 
-void Settings::setV2F(const std::string &name, v2f value)
+bool Settings::setV2F(const std::string &name, v2f value)
 {
        std::ostringstream os;
        os << "(" << value.X << "," << value.Y << ")";
-       set(name, os.str());
+       return set(name, os.str());
 }
 
 
-void Settings::setV3F(const std::string &name, v3f value)
+bool Settings::setV3F(const std::string &name, v3f value)
 {
        std::ostringstream os;
        os << "(" << value.X << "," << value.Y << "," << value.Z << ")";
-       set(name, os.str());
+       return set(name, os.str());
 }
 
 
-void Settings::setFlagStr(const std::string &name, u32 flags,
+bool Settings::setFlagStr(const std::string &name, u32 flags,
        const FlagDesc *flagdesc, u32 flagmask)
 {
-       set(name, writeFlagString(flags, flagdesc, flagmask));
-}
-
-
-bool Settings::setStruct(const std::string &name, const std::string &format,
-       void *value)
-{
-       std::string structstr;
-       if (!serializeStructToString(&structstr, format, value))
-               return false;
+       if (!flagdesc) {
+               if (!(flagdesc = getFlagDescFallback(name)))
+                       return false; // Not found
+       }
 
-       set(name, structstr);
-       return true;
+       return set(name, writeFlagString(flags, flagdesc, flagmask));
 }
 
 
-void Settings::setNoiseParams(const std::string &name, const NoiseParams &np)
+bool Settings::setNoiseParams(const std::string &name, const NoiseParams &np)
 {
        Settings *group = new Settings;
 
@@ -806,55 +966,35 @@ void Settings::setNoiseParams(const std::string &name, const NoiseParams &np)
        group->setS32("seed",          np.seed);
        group->setU16("octaves",       np.octaves);
        group->setFloat("persistence", np.persist);
+       group->setFloat("lacunarity",  np.lacunarity);
+       group->setFlagStr("flags",     np.flags, flagdesc_noiseparams, np.flags);
 
-       setGroup(name, group);
+       return setEntry(name, &group, true);
 }
 
 
 bool Settings::remove(const std::string &name)
 {
-       JMutexAutoLock lock(m_mutex);
-       return m_settings.erase(name);
-}
-
-
-void Settings::clear()
-{
-       JMutexAutoLock lock(m_mutex);
-       clearNoLock();
-}
-
-
-void Settings::updateValue(const Settings &other, const std::string &name)
-{
-       if (&other == this)
-               return;
+       // Lock as short as possible, unlock before doCallbacks()
+       m_mutex.lock();
 
-       JMutexAutoLock lock(m_mutex);
-
-       try {
-               std::string val = other.get(name);
+       SettingEntries::iterator it = m_settings.find(name);
+       if (it != m_settings.end()) {
+               delete it->second.group;
+               m_settings.erase(it);
+               m_mutex.unlock();
 
-               m_settings[name] = val;
-       } catch (SettingNotFoundException &e) {
+               doCallbacks(name);
+               return true;
        }
-}
 
-
-void Settings::update(const Settings &other)
-{
-       if (&other == this)
-               return;
-
-       JMutexAutoLock lock(m_mutex);
-       JMutexAutoLock lock2(other.m_mutex);
-
-       updateNoLock(other);
+       m_mutex.unlock();
+       return false;
 }
 
 
 SettingsParseEvent Settings::parseConfigObject(const std::string &line,
-       const std::string &end, std::string &name, std::string &value)
+       std::string &name, std::string &value)
 {
        std::string trimmed_line = trim(line);
 
@@ -862,7 +1002,7 @@ SettingsParseEvent Settings::parseConfigObject(const std::string &line,
                return SPE_NONE;
        if (trimmed_line[0] == '#')
                return SPE_COMMENT;
-       if (trimmed_line == end)
+       if (trimmed_line == m_end_tag)
                return SPE_END;
 
        size_t pos = trimmed_line.find('=');
@@ -881,41 +1021,73 @@ SettingsParseEvent Settings::parseConfigObject(const std::string &line,
 }
 
 
-void Settings::updateNoLock(const Settings &other)
+void Settings::clearNoLock()
 {
-       m_settings.insert(other.m_settings.begin(), other.m_settings.end());
-       m_defaults.insert(other.m_defaults.begin(), other.m_defaults.end());
+       for (SettingEntries::const_iterator it = m_settings.begin();
+                       it != m_settings.end(); ++it)
+               delete it->second.group;
+       m_settings.clear();
 }
 
 
-void Settings::clearNoLock()
+void Settings::setDefault(const std::string &name, const FlagDesc *flagdesc,
+       u32 flags)
 {
-       m_settings.clear();
-       m_defaults.clear();
+       s_flags[name] = flagdesc;
+       setDefault(name, writeFlagString(flags, flagdesc, U32_MAX));
 }
 
+const FlagDesc *Settings::getFlagDescFallback(const std::string &name) const
+{
+       auto it = s_flags.find(name);
+       return it == s_flags.end() ? nullptr : it->second;
+}
 
-void Settings::registerChangedCallback(std::string name,
-       setting_changed_callback cbf)
+void Settings::registerChangedCallback(const std::string &name,
+       SettingsChangedCallback cbf, void *userdata)
 {
-       m_callbacks[name].push_back(cbf);
+       MutexAutoLock lock(m_callback_mutex);
+       m_callbacks[name].emplace_back(cbf, userdata);
 }
 
+void Settings::deregisterChangedCallback(const std::string &name,
+       SettingsChangedCallback cbf, void *userdata)
+{
+       MutexAutoLock lock(m_callback_mutex);
+       SettingsCallbackMap::iterator it_cbks = m_callbacks.find(name);
+
+       if (it_cbks != m_callbacks.end()) {
+               SettingsCallbackList &cbks = it_cbks->second;
+
+               SettingsCallbackList::iterator position =
+                       std::find(cbks.begin(), cbks.end(), std::make_pair(cbf, userdata));
 
-void Settings::doCallbacks(const std::string name)
+               if (position != cbks.end())
+                       cbks.erase(position);
+       }
+}
+
+void Settings::removeSecureSettings()
 {
-       std::vector<setting_changed_callback> tempvector;
-       {
-               JMutexAutoLock lock(m_mutex);
-               if (m_callbacks.find(name) != m_callbacks.end())
-               {
-                       tempvector = m_callbacks[name];
-               }
+       for (const auto &name : getNames()) {
+               if (name.compare(0, 7, "secure.") != 0)
+                       continue;
+
+               errorstream << "Secure setting " << name
+                               << " isn't allowed, so was ignored."
+                               << std::endl;
+               remove(name);
        }
+}
 
-       for (std::vector<setting_changed_callback>::iterator iter = tempvector.begin();
-                       iter != tempvector.end(); iter ++)
-       {
-               (*iter)(name);
+void Settings::doCallbacks(const std::string &name) const
+{
+       MutexAutoLock lock(m_callback_mutex);
+
+       SettingsCallbackMap::const_iterator it_cbks = m_callbacks.find(name);
+       if (it_cbks != m_callbacks.end()) {
+               SettingsCallbackList::const_iterator it;
+               for (it = it_cbks->second.begin(); it != it_cbks->second.end(); ++it)
+                       (it->first)(name, it->second);
        }
 }