diff --git a/xs/src/libslic3r/Config.cpp b/xs/src/libslic3r/Config.cpp
index ccb357cf2..66b3d0445 100644
--- a/xs/src/libslic3r/Config.cpp
+++ b/xs/src/libslic3r/Config.cpp
@@ -106,7 +106,6 @@ bool unescape_string_cstyle(const std::string &str, std::string &str_out)
 
 bool unescape_strings_cstyle(const std::string &str, std::vector<std::string> &out)
 {
-    out.clear();
     if (str.empty())
         return true;
 
@@ -500,56 +499,109 @@ DynamicConfig::erase(const t_config_option_key &opt_key) {
     this->options.erase(opt_key);
 }
 
+void
+DynamicConfig::read_cli(const std::vector<std::string> &tokens, t_config_option_keys* extra)
+{
+    std::vector<const char*> _argv;
+    
+    // push a bogus executable name (argv[0])
+    _argv.push_back("");
+
+    for (size_t i = 0; i < tokens.size(); ++i)
+        _argv.push_back(const_cast<const char*>(tokens[i].c_str()));
+    
+    this->read_cli(_argv.size(), &_argv[0], extra);
+}
+
 void
 DynamicConfig::read_cli(const int argc, const char** argv, t_config_option_keys* extra)
 {
+    // cache the CLI option => opt_key mapping
+    std::map<std::string,std::string> opts;
+    for (const auto &oit : this->def->options) {
+        std::string cli = oit.second.cli;
+        cli = cli.substr(0, cli.find("="));
+        boost::trim_right_if(cli, boost::is_any_of("!"));
+        std::vector<std::string> tokens;
+        boost::split(tokens, cli, boost::is_any_of("|"));
+        for (const std::string &t : tokens)
+            opts[t] = oit.first;
+    }
+    
     bool parse_options = true;
     for (int i = 1; i < argc; ++i) {
         std::string token = argv[i];
         
+        // Store non-option arguments in the provided vector.
+        if (!parse_options || !boost::starts_with(token, "-")) {
+            extra->push_back(token);
+            continue;
+        }
+        
+        
+        // Stop parsing tokens as options when -- is supplied.
         if (token == "--") {
-            // stop parsing tokens as options
             parse_options = false;
-        } else if (parse_options && boost::starts_with(token, "-")) {
-            boost::algorithm::trim_left_if(token, boost::algorithm::is_any_of("-"));
-            // TODO: handle --key=value
-            
-            // look for the option def
-            t_config_option_key opt_key;
-            const ConfigOptionDef* optdef;
-            for (t_optiondef_map::const_iterator oit = this->def->options.begin();
-                oit != this->def->options.end(); ++oit) {
-                optdef  = &oit->second;
-                
-                if (optdef->cli == token
-                    || optdef->cli == token + '!'
-                    || boost::starts_with(optdef->cli, token + "=")
-                    || boost::starts_with(optdef->cli, token + "|")
-                    || (token.length() == 1 && boost::contains(optdef->cli, "|" + token))) {
-                    opt_key = oit->first;
-                    break;
-                }
+            continue;
+        }
+        
+        // Remove leading dashes
+        boost::trim_left_if(token, boost::is_any_of("-"));
+        
+        // Remove the "no-" prefix used to negate boolean options.
+        bool no = false;
+        if (boost::starts_with(token, "no-")) {
+            no = true;
+            boost::replace_first(token, "no-", "");
+        }
+        
+        // Read value when supplied in the --key=value form.
+        std::string value;
+        {
+            size_t equals_pos = token.find("=");
+            if (equals_pos != std::string::npos) {
+                value = token.substr(equals_pos+1);
+                token.erase(equals_pos);
             }
-            
-            if (opt_key.empty()) {
-                printf("Warning: unknown option --%s\n", token.c_str());
+        }
+        
+        // Look for the cli -> option mapping.
+        const auto it = opts.find(token);
+        if (it == opts.end()) {
+            printf("Warning: unknown option --%s\n", token.c_str());
+            continue;
+        }
+        const t_config_option_key opt_key = it->second;
+        const ConfigOptionDef &optdef = this->def->options.at(opt_key);
+        
+        // If the option type expects a value and it was not already provided,
+        // look for it in the next token.
+        if (optdef.type != coBool && optdef.type != coBools && value.empty()) {
+            if (i == (argc-1)) {
+                printf("No value supplied for --%s\n", token.c_str());
                 continue;
             }
-            
-            if (ConfigOptionBool* opt = this->opt<ConfigOptionBool>(opt_key, true)) {
-                opt->value = !boost::starts_with(token, "no-");
-            } else if (ConfigOptionBools* opt = this->opt<ConfigOptionBools>(opt_key, true)) {
-                opt->values.push_back(!boost::starts_with(token, "no-"));
-            } else {
-                // we expect one more token carrying the value
-                if (i == (argc-1)) {
-                    printf("No value supplied for --%s\n", token.c_str());
-                    exit(1);
-                }
-                this->set_deserialize(opt_key, argv[++i], true);
-            }
+            value = argv[++i];
+        }
+        
+        // Store the option value.
+        const bool existing = this->has(opt_key);
+        if (ConfigOptionBool* opt = this->opt<ConfigOptionBool>(opt_key, true)) {
+            opt->value = !no;
+        } else if (ConfigOptionBools* opt = this->opt<ConfigOptionBools>(opt_key, true)) {
+            if (!existing) opt->values.clear(); // remove the default values
+            opt->values.push_back(!no);
+        } else if (ConfigOptionStrings* opt = this->opt<ConfigOptionStrings>(opt_key, true)) {
+            if (!existing) opt->values.clear(); // remove the default values
+            opt->deserialize(value, true);
+        } else if (ConfigOptionFloats* opt = this->opt<ConfigOptionFloats>(opt_key, true)) {
+            if (!existing) opt->values.clear(); // remove the default values
+            opt->deserialize(value, true);
+        } else if (ConfigOptionPoints* opt = this->opt<ConfigOptionPoints>(opt_key, true)) {
+            if (!existing) opt->values.clear(); // remove the default values
+            opt->deserialize(value, true);
         } else {
-            extra->push_back(token);
+            this->set_deserialize(opt_key, value, true);
         }
     }
 }
diff --git a/xs/src/libslic3r/Config.hpp b/xs/src/libslic3r/Config.hpp
index 8e375701e..32a80adee 100644
--- a/xs/src/libslic3r/Config.hpp
+++ b/xs/src/libslic3r/Config.hpp
@@ -12,6 +12,9 @@
 #include <vector>
 #include "libslic3r.h"
 #include "Point.hpp"
+#include <boost/algorithm/string/classification.hpp>
+#include <boost/algorithm/string/split.hpp>
+#include <boost/lexical_cast.hpp>
 
 namespace Slic3r {
 
@@ -248,6 +251,7 @@ class ConfigOptionStrings : public ConfigOptionVector<std::string>
     };
     
     bool deserialize(std::string str, bool append = false) {
+        if (!append) this->values.clear();
         return unescape_strings_cstyle(str, this->values);
     };
 };
@@ -392,20 +396,23 @@ class ConfigOptionPoints : public ConfigOptionVector<Pointf>
     
     bool deserialize(std::string str, bool append = false) {
         if (!append) this->values.clear();
-        std::istringstream is(str);
-        std::string point_str;
-        while (std::getline(is, point_str, ',')) {
-            Pointf point;
-            std::istringstream iss(point_str);
-            std::string coord_str;
-            if (std::getline(iss, coord_str, 'x')) {
-                std::istringstream(coord_str) >> point.x;
-                if (std::getline(iss, coord_str, 'x')) {
-                    std::istringstream(coord_str) >> point.y;
-                }
+        
+        std::vector<std::string> tokens;
+        boost::split(tokens, str, boost::is_any_of("x,"));
+        if (tokens.size() % 2) return false;
+        
+        try {
+            for (size_t i = 0; i < tokens.size(); ++i) {
+                Pointf point;
+                point.x = boost::lexical_cast<coordf_t>(tokens[i]);
+                point.y = boost::lexical_cast<coordf_t>(tokens[++i]);
+                this->values.push_back(point);
             }
-            this->values.push_back(point);
+        } catch (boost::bad_lexical_cast &e) {
+            printf("%s\n", e.what());
+            return false;
         }
+        
         return true;
     };
 };
@@ -691,6 +698,7 @@ class DynamicConfig : public virtual ConfigBase
     virtual ConfigOption* optptr(const t_config_option_key &opt_key, bool create = false);
     t_config_option_keys keys() const;
     void erase(const t_config_option_key &opt_key);
+    void read_cli(const std::vector<std::string> &tokens, t_config_option_keys* extra);
     void read_cli(const int argc, const char **argv, t_config_option_keys* extra);
     
     private:
diff --git a/xs/t/15_config.t b/xs/t/15_config.t
index 256fa539f..214baad9f 100644
--- a/xs/t/15_config.t
+++ b/xs/t/15_config.t
@@ -4,7 +4,7 @@ use strict;
 use warnings;
 
 use Slic3r::XS;
-use Test::More tests => 147;
+use Test::More tests => 159;
 use Data::Dumper;
 
 foreach my $config (Slic3r::Config->new, Slic3r::Config::Static::new_FullPrintConfig) {
@@ -251,4 +251,45 @@ foreach my $config (Slic3r::Config->new, Slic3r::Config::Static::new_FullPrintCo
     ok 1, 'did not crash on reading invalid items in config';
 }
 
+{
+    my $parse = sub {
+        my @argv = @_;
+        my $config = Slic3r::Config->new;
+        $config->read_cli(\@argv);
+        return $config;
+    };
+    {
+        my $config = $parse->(qw(--extra-perimeters --perimeters 1 --layer-height 0.45 
+            --fill-density 70% --detect-bridging-perimeters --notes=foobar));
+        is $config->get('extra_perimeters'), 1, 'read_cli(): bool';
+        is $config->get('perimeters'), 1, 'read_cli(): int';
+        is $config->get('layer_height'), 0.45, 'read_cli(): float';
+        is $config->serialize('fill_density'), '70%', 'read_cli(): percent';
+        is $config->get('overhangs'), 1, 'read_cli(): alternative';
+        is $config->get('notes'), 'foobar', 'read_cli(): key=val';
+    }
+    {
+        my $config = $parse->(qw(--extra-perimeters --no-extra-perimeters));
+        ok $config->has('extra_perimeters'), 'read_cli(): negated bool';
+        is_deeply $config->get('extra_perimeters'), 0, 'read_cli(): negated bool';
+    }
+    {
+        my $config = $parse->(qw(--wipe --no-wipe --wipe));
+        is_deeply $config->get('wipe'), [1,0,1], 'read_cli(): bools array';
+    }
+    {
+        my $config = $parse->(qw(--post-process foo --post-process bar));
+        is_deeply $config->get('post_process'), ['foo', 'bar'], 'read_cli(): strings array';
+    }
+    {
+        my $config = $parse->(qw(--retract-speed 0.4 --retract-speed 0.5));
+        is_deeply $config->get('retract_speed'), [0.4, 0.5], 'read_cli(): floats array';
+    }
+    {
+        my $config = $parse->(qw(--extruder-offset 0,0 --extruder-offset 10x5));
+        is_deeply [ map $_->pp, @{$config->get('extruder_offset')} ],
+            [[0,0], [10,5]], 'read_cli(): points array';
+    }
+}
+
 __END__
diff --git a/xs/xsp/Config.xsp b/xs/xsp/Config.xsp
index 96c4830e0..6b4fb1950 100644
--- a/xs/xsp/Config.xsp
+++ b/xs/xsp/Config.xsp
@@ -40,6 +40,8 @@
     double min_object_distance();
     %name{_load} void load(std::string file);
     %name{_save} void save(std::string file);
+    std::vector<std::string> read_cli(std::vector<std::string> _argv)
+        %code{% THIS->read_cli(_argv, &RETVAL); %};
 };
 
 %name{Slic3r::Config::Static} class StaticPrintConfig {