diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a6e760d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+/obj
+/test
+/run-tests.sh
+/Zmakefile
+/TODO
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..3d50c54
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,62 @@
+## CONFIG ##
+
+IDIR=include
+SRCDIR=src
+ODIR=obj
+BINDIR=.
+
+# binary name, default name of dir
+NAME = $(shell readlink -f . | xargs basename)
+
+# global links
+LDFLAGS = -lpthread
+
+# compiler
+CC=g++
+# compiler flags
+CXXFLAGS= -I$(IDIR) -Wall -pedantic -std=c++17
+ifeq     ($(DEBUG),true)
+        # debugging flags
+	CC=clang++
+        CXXFLAGS += -g
+else
+        # release flags
+        CXXFLAGS += -O2
+endif
+ifeq    ($(STATIC),true)
+        # static links
+        LDFLAGS += -l:libztd.a
+else
+        # dynamic links
+        LDFLAGS += -lztd
+endif
+
+## END CONFIG ##
+
+
+
+$(shell mkdir -p $(ODIR))
+$(shell mkdir -p $(BINDIR))
+
+# automatically find .h and .hpp
+DEPS = $(shell find $(IDIR) -type f -regex '.*\.hp?p?')
+# automatically find .c and .cpp and make the corresponding .o rule
+OBJ = $(shell find $(SRCDIR) -type f -regex '.*\.cp?p?' | sed 's|\.cpp|.o|g;s|\.c|.o|g;s|^$(SRCDIR)/|$(ODIR)/|g')
+
+$(ODIR)/%.o: $(SRCDIR)/%.c $(DEPS)
+	$(CC) $(CXXFLAGS) -c -o $@ $<
+
+$(ODIR)/%.o: $(SRCDIR)/%.cpp $(DEPS)
+	$(CC) $(CXXFLAGS) -c -o $@ $<
+
+$(BINDIR)/$(NAME): $(OBJ)
+	$(CC) $(CXXFLAGS) $(LDFLAGS) -o $@ $^
+
+test: $(BINDIR)/$(NAME)
+	$(BINDIR)/$(NAME)
+
+clean:
+	rm $(ODIR)/*.o
+
+clear:
+	rm $(BINDIR)/$(NAME)
diff --git a/include/options.hpp b/include/options.hpp
new file mode 100644
index 0000000..45f724d
--- /dev/null
+++ b/include/options.hpp
@@ -0,0 +1,36 @@
+#ifndef OPTIONS_HPP
+#define OPTIONS_HPP
+
+#include <ztd/options.hpp>
+
+extern ztd::option_set options;
+
+extern bool opt_minimize;
+
+ztd::option_set gen_options();
+void print_help(const char* arg0);
+
+void print_include_help();
+void print_resolve_help();
+
+/**
+%include [options]
+options:
+  -s   single quote contents
+  -d   double quote contents
+  -e   escape chars. For double quotes
+  -r   include raw text, don't parse. Don't count as included
+  -f   include even if already included. Don't count as included
+*/
+ztd::option_set create_include_opts();
+
+/**
+%resolve [options]
+options:
+  -e   escape chars. For double quotes
+  -p   parse as shell code
+  -f   ignore non zero return values
+*/
+ztd::option_set create_resolve_opts();
+
+#endif //OPTIONS_HPP
diff --git a/include/parse.hpp b/include/parse.hpp
new file mode 100644
index 0000000..2bd9b2f
--- /dev/null
+++ b/include/parse.hpp
@@ -0,0 +1,17 @@
+#ifndef PARSE_HPP
+#define PARSE_HPP
+
+#include "struc.hpp"
+
+#include <string>
+
+#include <ztd/filedat.hpp>
+
+extern std::string g_origin;
+
+std::string import_file(std::string const& path);
+
+block parse(const char* in, uint32_t size);
+inline block parse(std::string const& in) { return parse(in.c_str(), in.size()); }
+
+#endif //PARSE_HPP
diff --git a/include/struc.hpp b/include/struc.hpp
new file mode 100644
index 0000000..f9bc0ef
--- /dev/null
+++ b/include/struc.hpp
@@ -0,0 +1,175 @@
+#ifndef STRUC_HPP
+#define STRUC_HPP
+
+#include <string>
+#include <vector>
+#include <set>
+
+#include <exception>
+#include <stdexcept>
+
+/*
+structure:
+
+block:
+- group
+  - brace:  condlist[]
+  - subsh:  condlist[]
+- cmd: arglist[]
+- if
+  - pair<condlist[]>[]
+
+condlist:
+  pipeline[]
+
+pipeline:
+  block[]
+
+arglist:
+  arg[]
+
+arg:
+- raw
+- subarg[]
+
+subarg:
+- raw
+- variable
+- block: subshell
+
+
+*/
+
+#define AND_OP false
+#define OR_OP  true
+
+class condlist;
+class block;
+class pipeline;
+class arg;
+class subarg;
+
+typedef std::vector<condlist> list_t;
+
+block make_cmd(std::vector<std::string> args);
+
+bool add_include(std::string const& file);
+
+class arg
+{
+public:
+  arg() { ; }
+  arg(std::string const& str) {this->setstring(str);}
+
+  void setstring(std::string const& str);
+
+  std::string raw;
+
+  std::vector<subarg> sa;
+
+  std::string string();
+  std::string generate(int ind);
+};
+
+class arglist
+{
+public:
+  inline void add(arg const& in) { args.push_back(in); }
+  inline void push_back(arg const& in) { args.push_back(in); }
+
+  std::vector<arg> args;
+
+  std::vector<std::string> strargs(uint32_t start);
+
+  inline uint64_t size() { return args.size(); }
+  inline arg& operator[](uint32_t i) { return args[i]; }
+
+  std::string generate(int ind);
+};
+
+class redir
+{
+public:
+  enum redirtype { none, write, append, read, raw } ;
+  redir(redirtype in=none) { type=in; }
+  redirtype type;
+  arg val;
+};
+
+class block
+{
+public:
+  enum blocktype { none, subshell, brace, main, cmd, function, case_block, for_block, if_block, while_block};
+  block() { type=none; }
+  block(blocktype in) { type=in; }
+  blocktype type;
+  // subshell/brace/main
+  list_t cls;
+  // cmd
+  arglist args;
+
+  // case
+  arg carg;
+  std::vector< std::pair<arg, list_t> > cases;
+
+  // main: shebang
+  // function: name
+  std::string shebang;
+
+  // subshell: return the containing cmd, if it is a single command
+  block* single_cmd();
+
+  std::string generate(int ind=0, bool print_shebang=true);
+
+private:
+  std::string generate_cmd(int ind);
+  std::string generate_case(int ind);
+};
+
+class pipeline
+{
+public:
+  pipeline() {;}
+  pipeline(block const& bl) { cmds.push_back(bl); }
+  inline void add(block bl) { this->cmds.push_back(bl); }
+  std::vector<block> cmds;
+
+  std::string generate(int ind);
+};
+
+class condlist
+{
+public:
+  condlist() { parallel=false; }
+  condlist(block const& pl) { parallel=false; this->add(pl);}
+  condlist(pipeline const& pl) { parallel=false; this->add(pl);}
+  void add(pipeline const& pl, bool or_op=false);
+
+  bool parallel;
+  // don't push_back here
+  std::vector<bool> or_ops;
+  std::vector<pipeline> pls;
+
+  std::string generate(int ind);
+};
+
+
+class subarg
+{
+public:
+  enum argtype { string, subshell };
+  subarg(argtype in) { this->type=in; }
+  subarg(std::string const& in="") { type=string; val=in; }
+  subarg(block const& in) { type=subshell; sbsh=in; }
+
+  argtype type;
+  // raw string
+  std::string val;
+  // subshell
+  block sbsh;
+
+  std::string generate(int ind);
+};
+
+
+#endif //STRUC_HPP
diff --git a/include/util.hpp b/include/util.hpp
new file mode 100644
index 0000000..9c1ae99
--- /dev/null
+++ b/include/util.hpp
@@ -0,0 +1,32 @@
+#ifndef UTIL_HPP
+#define UTIL_HPP
+
+#include <string>
+#include <vector>
+#include <memory>
+#include <exception>
+#include <stdexcept>
+
+#define INDENT indent(ind)
+
+extern std::string indenting_string;
+
+std::string indent(int n);
+
+std::vector<std::string> split(std::string const& in, char c);
+
+std::string escape_str(std::string const& in);
+
+template<typename ... Args>
+std::string strf( const std::string& format, Args ... args )
+{
+    size_t size = snprintf( nullptr, 0, format.c_str(), args ... ) + 1; // Extra space for '\0'
+    if( size <= 0 ){ throw std::runtime_error( "Error during formatting." ); }
+    std::unique_ptr<char[]> buf( new char[ size ] );
+    snprintf( buf.get(), size, format.c_str(), args ... );
+    return std::string( buf.get(), buf.get() + size - 1 ); // We don't want the '\0' inside
+}
+
+std::string delete_brackets(std::string const& in);
+
+#endif //UTIL_HPP
diff --git a/lxsh b/lxsh
new file mode 100755
index 0000000..65272ee
Binary files /dev/null and b/lxsh differ
diff --git a/src/generate.cpp b/src/generate.cpp
new file mode 100644
index 0000000..25848bb
--- /dev/null
+++ b/src/generate.cpp
@@ -0,0 +1,332 @@
+#include "struc.hpp"
+
+#include <ztd/shell.hpp>
+
+#include "util.hpp"
+#include "options.hpp"
+#include "parse.hpp"
+
+std::vector<std::string> included;
+
+bool is_sub_special_cmd(std::string in)
+{
+  return in == "%include_sub" || in == "%resolve_sub";
+}
+
+std::string arg::generate(int ind)
+{
+  std::string ret;
+  for(auto it: sa)
+  {
+    ret += it.generate(ind);
+  }
+  return ret;
+}
+
+std::string arglist::generate(int ind)
+{
+  std::string ret;
+
+  for(auto it: args)
+  {
+    ret += it.generate(ind);
+    ret += ' ';
+  }
+
+  ret.pop_back();
+
+  return ret;
+}
+
+std::string pipeline::generate(int ind)
+{
+  std::string ret;
+
+  ret += cmds[0].generate(ind);
+  for(uint32_t i=1 ; i<cmds.size() ; i++)
+  {
+    ret += opt_minimize ? "|" : " | " ;
+    ret += cmds[i].generate(ind);
+  }
+
+  return ret;
+}
+
+std::string condlist::generate(int ind)
+{
+  std::string ret;
+  if(!opt_minimize) ret += INDENT;
+  ret += pls[0].generate(ind);
+  for(uint32_t i=0 ; i<pls.size()-1 ; i++)
+  {
+    if(or_ops[i])
+      ret += opt_minimize ? "||" : " || ";
+    else
+      ret += opt_minimize ? "&&" : " && ";
+    ret += pls[i+1].generate(ind);
+  }
+  if(ret=="")
+    return "";
+  if(parallel)
+  {
+    ret += opt_minimize ? "&" : "&\n";
+  }
+  else
+    ret += '\n';
+  return ret;
+}
+
+bool add_include(std::string const& file)
+{
+  std::string truepath=ztd::exec("readlink", "-f", file).first;
+  for(auto it: included)
+  {
+    if(it == truepath)
+      return false;
+  }
+  included.push_back(truepath);
+  return true;
+}
+
+std::string concatargs(std::vector<std::string> args)
+{
+  std::string ret;
+  for(auto it: args)
+    ret += it + ' ';
+  ret.pop_back();
+  return ret;
+}
+
+std::string generate_resolve(std::vector<std::string> args, int ind)
+{
+  auto opts=create_resolve_opts();
+  auto rargs = opts.process(args, false, true, false);
+
+  std::string cmd=concatargs(rargs);
+  auto p=ztd::shp("exec "+cmd);
+
+  if(!opts['f'] && p.second!=0)
+  {
+    throw std::runtime_error(  strf("command `%s` returned %u", cmd.c_str(), p.second) );
+  }
+  while(p.first[p.first.size()-1] == '\n')
+    p.first.pop_back();
+
+  if(opts['p'])
+  {
+    block bl = parse(p.first);
+    std::string ret = bl.generate(ind, false);
+    std::string tmpind=INDENT;
+    ret = ret.substr(tmpind.size());
+    ret.pop_back(); // remove \n
+    return ret;
+  }
+  else
+  {
+    return p.first;
+  }
+}
+
+std::string generate_include(std::vector<std::string> args, int ind)
+{
+  std::string ret;
+
+  auto opts=create_include_opts();
+  auto rargs = opts.process(args, false, true, false);
+
+  std::string quote;
+  if(opts['s'])
+    quote = '\'';
+  else if(opts['d'])
+    quote = '"';
+
+  // do shell resolution
+  std::string command="for I in ";
+  for(auto it: rargs)
+    command += it + ' ';
+  command += "; do echo $I ; done";
+  std::string inc=ztd::sh(command);
+
+  auto v = split(inc, '\n');
+
+  std::string file;
+  block bl;
+  bool indent_remove=true;
+
+  for(auto it : v)
+  {
+    if( opts['f'] ||      // force include
+        add_include(it) ) // not already included
+    {
+      file=import_file(it);
+      if(opts['r'])
+        ret += file;
+      else
+      {
+        try
+        {
+          bl = parse(quote + file + quote);
+        }
+        catch(ztd::format_error& e)
+        {
+          throw ztd::format_error(e.what(), it, e.data(), e.where());
+        }
+        file = bl.generate(ind, false);
+        if(indent_remove)
+        {
+          indent_remove=false;
+          std::string tmpind=INDENT;
+          file = file.substr(tmpind.size());
+        }
+        ret += file;
+      }
+    }
+  }
+
+  if(!opts['r'])
+    ret.pop_back();
+
+  return ret;
+}
+
+std::string block::generate_cmd(int ind)
+{
+  std::string ret;
+  if(args.size()<=0)
+    return "";
+  std::string cmd=args[0].raw;
+  if(cmd == "%include" || cmd == "%include_s")
+  {
+    ret += generate_include(args.strargs(1), ind);
+  }
+  else if(cmd == "%resolve" || cmd == "%resolve_s")
+  {
+    ret += generate_resolve(args.strargs(1), ind);
+  }
+  else
+    ret = args.generate(ind);
+  return ret;
+}
+
+std::string block::generate_case(int ind)
+{
+  std::string ret;
+  ret += "case " + carg.generate(ind) + " in\n";
+  ind++;
+  for(auto cs: this->cases)
+  {
+    if(!opt_minimize) ret += INDENT;
+    ret += cs.first.generate(ind) + ')';
+    if(!opt_minimize) ret += '\n';
+    for(auto it: cs.second)
+      ret += it.generate(ind+1);
+    if(opt_minimize)
+    {
+      if(ret[ret.size()-1] == '\n')
+        ret.pop_back();
+    }
+    else
+    {
+      ind++;
+      ret += INDENT;
+      ind--;
+    }
+    ret += ";;\n";
+  }
+  ind--;
+  if(!opt_minimize) ret += INDENT;
+  ret += "esac";
+  return ret;
+}
+
+std::string block::generate(int ind, bool print_shebang)
+{
+  std::string ret;
+
+  if(type==cmd)
+  {
+    ret += generate_cmd(ind);
+  }
+  else
+  {
+    if(type==function)
+    {
+      ret += shebang + "()";
+      if(!opt_minimize) ret += '\n' + INDENT;
+        ret += "{\n";
+      for(auto it: cls)
+        ret += it.generate(ind+1);
+      if(!opt_minimize)
+        ret += INDENT;
+      ret += '}';
+    }
+    else if(type==subshell)
+    {
+      ret += '(';
+      if(!opt_minimize) ret += '\n';
+      for(auto it: cls)
+        ret += it.generate(ind+1);
+      if(opt_minimize)
+        ret.pop_back();
+      else
+        ret += INDENT;
+      ret += ')';
+    }
+    else if(type==brace)
+    {
+      ret += "{\n" ;
+      for(auto it: cls)
+        ret += it.generate(ind+1);
+      if(!opt_minimize)
+        ret += INDENT;
+      ret += '}';
+    }
+    else if(type==main)
+    {
+      if(print_shebang && shebang!="")
+        ret += shebang + '\n';
+      for(auto it: cls)
+        ret += it.generate(ind);
+    }
+    else if(type==case_block)
+    {
+      ret += generate_case(ind);
+    }
+
+    std::string t = generate_cmd(ind); // leftover redirections
+    if(t!="")
+    {
+      if(!opt_minimize) ret += ' ';
+      ret += t;
+    }
+
+  }
+
+  return ret;
+}
+
+std::string subarg::generate(int ind)
+{
+  std::string ret;
+  if(type == subarg::string)
+  {
+    ret += val;
+  }
+  else if(type == subarg::subshell)
+  {
+    // includes and resolves inside command substitutions
+    // resolve here and not inside subshell
+    block* cmd = sbsh.single_cmd();
+    if( cmd != nullptr && (cmd->args[0].raw == "%include" || cmd->args[0].raw == "%resolve") )
+    {
+      ret += cmd->generate(ind);
+    }
+    // regular substitution
+    else
+    {
+      ret += '$';
+      ret += sbsh.generate(ind);
+    }
+  }
+  return ret;
+}
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..7d4deef
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,91 @@
+#include <iostream>
+
+#include <string.h>
+
+#include <ztd/options.hpp>
+#include <ztd/shell.hpp>
+
+#include <unistd.h>
+
+#include "struc.hpp"
+#include "parse.hpp"
+#include "options.hpp"
+
+int main(int argc, char* argv[])
+{
+  auto args=options.process(argc, argv);
+
+  if(options['m'])
+    opt_minimize=true;
+
+  bool piped=false;
+
+  if(options['h'])
+  {
+    print_help(argv[0]);
+    return 1;
+  }
+  if(options["help-commands"])
+  {
+    print_include_help();
+    printf("\n\n");
+    print_resolve_help();
+    return 1;
+  }
+
+  std::string file;
+  if(args.size() > 0)
+  {
+    if(args[0] == "-")
+    {
+      piped=true;
+      file = "/dev/stdin";
+    }
+    else
+      file=args[0];
+  }
+  else
+  {
+    if(isatty(fileno(stdin)))
+    {
+      print_help(argv[0]);
+      return 1;
+    }
+    else
+    {
+      piped=true;
+      file = "/dev/stdin";
+    }
+  }
+
+  if(!piped && !options['C'])
+  {
+    std::string dir=ztd::exec("dirname", file).first;
+    dir.pop_back();
+    file=ztd::exec("basename", file).first;
+    file.pop_back();
+    chdir(dir.c_str());
+  }
+
+  g_origin=file;
+  add_include(file);
+
+  if(args.size()>0)
+  {
+    try
+    {
+      block sh(parse(import_file(file)));
+      std::cout << sh.generate();
+    }
+    catch(ztd::format_error& e)
+    {
+      printFormatException(e);
+    }
+    catch(std::exception& e)
+    {
+      std::cerr << e.what() << std::endl;
+    }
+  }
+
+  return 0;
+}
diff --git a/src/options.cpp b/src/options.cpp
new file mode 100644
index 0000000..fa0c6e0
--- /dev/null
+++ b/src/options.cpp
@@ -0,0 +1,76 @@
+#include "options.hpp"
+
+ztd::option_set options = gen_options();
+bool opt_minimize;
+
+ztd::option_set gen_options()
+{
+  ztd::option_set ret;
+  ret.add(ztd::option('h', "help",     false, "Display this help message"));
+  ret.add(ztd::option('m', "minimize", false, "Minimize code"));
+  ret.add(ztd::option('C', "no-cd",    false, "Don't change directories"));
+  ret.add(ztd::option("help-commands", false, "Print help for linker commands"));
+  return ret;
+}
+
+ztd::option_set create_include_opts()
+{
+  ztd::option_set opts;
+  opts.add(
+    ztd::option('s', false, "Single quote contents"),
+    ztd::option('d', false, "Double quote contents"),
+    // ztd::option('e', false, "Escape for double quotes"),
+    ztd::option('r', false, "Include raw contents, don't parse"),
+    ztd::option('f', false, "Force include even if already included. Don't count as included")
+  );
+  return opts;
+}
+
+ztd::option_set create_resolve_opts()
+{
+  ztd::option_set opts;
+  opts.add(
+    // ztd::option('e', false, "Escape for double quotes"),
+    ztd::option('p', false, "Parse contents as shell code"),
+    ztd::option('f', false, "Ignore non-zero return values")
+  );
+  return opts;
+}
+
+void print_help(const char* arg0)
+{
+  printf("%s [options] [file]\n", arg0);
+  printf("Link extended shell, allows file including and command resolving\n");
+  printf("See --help-commands for help on linker commands\n");
+  printf("\n");
+  printf("Options:\n");
+  options.print_help(3,20);
+}
+
+void print_include_help()
+{
+  printf("%%include [options] <file...>\n");
+  printf("Include the targeted files. Paths are relative to folder of current file\n");
+  printf(" - Regular shell processing applies to the file arguments\n");
+  printf(" - Only includes not already included files\n");
+  printf(" - `%%include` in command substitutions replaces the substitution\n");
+  printf(" =>`%%include_s` can be used inside a substitution to prevent this\n");
+  printf("\n");
+
+  ztd::option_set opts=create_include_opts();
+  printf("Options:\n");
+  opts.print_help(3,7);
+}
+void print_resolve_help()
+{
+  printf("%%resolve [options] <command...>\n");
+  printf("Execute shell command and substitute output. Paths is from folder of current file\n");
+  printf(" - Fails if return value is not 0. Can be ignored with -f\n");
+  printf(" - `%%resolve` in command substitutions replaces the substitution\n");
+  printf(" =>`%%resolve_s` can be used inside a substitution to prevent this\n");
+  printf("\n");
+
+  ztd::option_set opts=create_resolve_opts();
+  printf("Options:\n");
+  opts.print_help(3,7);
+}
diff --git a/src/parse.cpp b/src/parse.cpp
new file mode 100644
index 0000000..39e4351
--- /dev/null
+++ b/src/parse.cpp
@@ -0,0 +1,458 @@
+#include "parse.hpp"
+
+#include <fstream>
+#include <strings.h>
+#include <string.h>
+
+#include "util.hpp"
+
+std::string g_origin;
+
+inline bool is_in(char c, const char* set)
+{
+  return index(set, c) != NULL;
+}
+
+inline bool is_alphanum(char c)
+{
+  return (c >= 'a' && c<='z') || (c >= 'A' && c<='Z') || (c >= '0' && c<='9');
+}
+inline bool is_alpha(char c)
+{
+  return (c >= 'a' && c<='z') || (c >= 'A' && c<='Z');
+}
+
+bool word_eq(const char* word, const char* in, uint32_t size, uint32_t start, const char* end_set=NULL)
+{
+  uint32_t wordsize=strlen(word);
+  if(wordsize > size-start)
+    return false;
+  if(strncmp(word, in+start, wordsize) == 0)
+  {
+    if(end_set==NULL)
+      return true;
+    // end set
+    if(wordsize < size-start)
+      return is_in(in[start+wordsize], end_set);
+  }
+  return false;
+}
+
+uint32_t skip_chars(const char* in, uint32_t size, uint32_t start, const char* set)
+{
+  for(uint32_t i=start; i<size ; i++)
+  {
+    if(!is_in(in[i],set))
+      return i;
+  }
+  return size;
+}
+uint32_t skip_until(const char* in, uint32_t size, uint32_t start, const char* set)
+{
+  for(uint32_t i=start; i<size ; i++)
+  {
+    if(is_in(in[i],set))
+      return i;
+  }
+  return size;
+}
+uint32_t skip_unread(const char* in, uint32_t size, uint32_t start)
+{
+  uint32_t i=start;
+  while(true)
+  {
+    i = skip_chars(in, size, i, " \t\n");
+    if(in[i] != '#') // not a comment
+      return i;
+    i = skip_until(in, size, i, "\n"); //skip to endline
+  }
+}
+
+std::pair<block, uint32_t> parse_subshell(const char* in, uint32_t size, uint32_t start);
+
+// parse one argument
+// must start at a read char
+// ends at either " \t|&;\n()"
+std::pair<arg, uint32_t> parse_arg(const char* in, uint32_t size, uint32_t start)
+{
+  arg ret;
+  // j : start of subarg
+  uint32_t i=start,j=start;
+  while(i<size && !is_in(in[i], " \t|&;\n()"))
+  {
+    if(i+1<size && is_in(in[i], "<>") && in[i+1]=='&') // special case for <& and >&
+    {
+      i+=2;
+    }
+    else if(in[i]=='\\') // backslash: don't check next char
+    {
+      i++;
+      if(i>=size)
+        break;
+      i++;
+    }
+    else if(in[i] == '"') // start double quote
+    {
+      i++;
+      while(i<size && in[i] != '"') // while inside quoted string
+      {
+        if(in[i] == '\\') // backslash: don't check next char
+        {
+          i++;
+          if(i>=size)
+            break;
+          i++;
+        }
+        else if( word_eq("$(", in, size, i) ) // substitution
+        {
+          // add string subarg
+          ret.sa.push_back(subarg(std::string(in+j, i-j)));
+          i+=2;
+          // add subshell subarg
+          auto r=parse_subshell(in, size, i);
+          ret.sa.push_back(subarg(r.first));
+          j = i = r.second;
+        }
+        else
+          i++;
+      }
+      if(i>=size)
+        break;
+      i++;
+    }
+    else if(in[i] == '\'') // start single quote
+    {
+      i++;
+      while(i<size && in[i]!='\'')
+        i++;
+      if(i>=size)
+        break;
+      i++;
+    }
+    else if( word_eq("$(", in, size, i) ) // substitution
+    {
+      ret.sa.push_back(subarg(std::string(in+j, i-j)));
+      i+=2;
+      auto r=parse_subshell(in, size, i);
+      ret.sa.push_back(subarg(r.first));
+      j = i = r.second;
+    }
+    else
+      i++;
+  }
+
+  // add string subarg
+  std::string val=std::string(in+j, i-j);
+  ret.sa.push_back(subarg(val));
+
+  // raw string for other uses
+  ret.raw = std::string(in+start, i-start);
+
+  return std::make_pair(ret, i);
+}
+
+// parse one list of arguments (a command for instance)
+// must start at a read char
+// first char has to be read
+// ends at either &|;\n#()
+std::pair<arglist, uint32_t> parse_arglist(const char* in, uint32_t size, uint32_t start)
+{
+  uint32_t i=start;
+  arglist ret;
+  while(i<size)
+  {
+    auto pp=parse_arg(in, size, i);
+    ret.args.push_back(pp.first);
+    i = skip_chars(in, size, pp.second, " \t");
+    if(i>=size || is_in(in[i], "&|;\n#()") )
+      return std::make_pair(ret, i);
+  }
+  return std::make_pair(ret, i);
+}
+
+std::pair<block, uint32_t> parse_block(const char* in, uint32_t size, uint32_t start);
+
+// parse a pipeline
+// must start at a read char
+// separated by |
+// ends at either &;\n#)
+std::pair<pipeline, uint32_t> parse_pipeline(const char* in, uint32_t size, uint32_t start)
+{
+  uint32_t i = skip_unread(in, size, start);
+  pipeline ret;
+  while(i<size)
+  {
+    auto pp=parse_block(in, size, i);
+    ret.add(pp.first);
+    i = skip_chars(in, size, pp.second, " \t");
+    if( (i>=size || is_in(in[i], "&;\n#)") ) || word_eq("||", in, size, i) )
+      return std::make_pair(ret, i);
+    else if( in[i] != '|')
+      throw ztd::format_error( strf("Unexpected token: '%c'", in[i] ), g_origin, in, i);
+    i++;
+  }
+  return std::make_pair(ret, i);
+}
+
+// parse condition lists
+// must start at a read char
+// separated by && or ||
+// ends at either ;\n)#
+std::pair<condlist, uint32_t> parse_condlist(const char* in, uint32_t size, uint32_t start)
+{
+  uint32_t i = skip_unread(in, size, start);
+  condlist ret;
+  bool optype=AND_OP;
+  while(i<size)
+  {
+    auto pp=parse_pipeline(in, size, i);
+    ret.add(pp.first, optype);
+    i = pp.second;
+    if(i>=size || is_in(in[i], ")#")) // end here exactly: used for control later
+    {
+      return std::make_pair(ret, i);
+    }
+    else if(is_in(in[i], ";\n")) // end one char after: skip them for next parse
+    {
+      i++;
+      return std::make_pair(ret, i);
+    }
+    else if( word_eq("&", in, size, i) && !word_eq("&&", in, size, i) ) // parallel: end one char after
+    {
+      ret.parallel=true;
+      i++;
+      return std::make_pair(ret, i);
+    }
+    else if( word_eq("&&", in, size, i) ) // and op
+    {
+      i += 2;
+      optype=AND_OP;
+    }
+    else if( word_eq("||", in, size, i) ) // or op
+    {
+      i += 2;
+      optype=OR_OP;
+    }
+    else if(i<size-1) // bad combination
+      throw ztd::format_error( strf("Unexpected token: '%c%c'", in[i], in[i+1]), g_origin, in, i);
+    else // unknown
+      throw ztd::format_error("Unknown error", g_origin, in, i);
+  }
+  return std::make_pair(ret, i);
+}
+
+// parse condlists until )
+std::pair<block, uint32_t> parse_subshell(const char* in, uint32_t size, uint32_t start)
+{
+  uint32_t i = skip_unread(in, size, start);
+  block ret(block::subshell);
+  while(i<size && in[i] != ')')
+  {
+    auto pp=parse_condlist(in, size, i);
+    ret.cls.push_back(pp.first);
+    i = skip_unread(in, size, pp.second);
+  }
+  if(i>=size)
+    throw ztd::format_error("Expecting )", g_origin, in, start-1);
+  i++;
+  return std::make_pair(ret,i);
+}
+
+// parse condlists until }
+std::pair<block, uint32_t> parse_brace(const char* in, uint32_t size, uint32_t start)
+{
+  uint32_t i = skip_unread(in, size, start);
+  block ret(block::brace);
+  while(i<size && in[i] != '}')
+  {
+    auto pp=parse_condlist(in, size, i);
+    ret.cls.push_back(pp.first);
+    i = skip_unread(in, size, pp.second);
+    if(is_in(in[i], ")"))
+      throw ztd::format_error( strf("Unexpected token: '%c'", in[i]) , g_origin, in, i );
+  }
+  if(i>=size)
+    throw ztd::format_error("Expecting }", g_origin, in, start-1);
+
+  i++;
+
+  return std::make_pair(ret,i);
+}
+
+std::pair<block, uint32_t> parse_function(const char* in, uint32_t size, uint32_t start)
+{
+  block ret(block::function);
+  uint32_t i=start;
+
+  i=skip_unread(in, size, i);
+  if(in[i] != '{')
+    throw ztd::format_error("Expecting { after ()", g_origin, in, i);
+
+  i++;
+  auto pp = parse_brace(in, size, i);
+  ret.cls = pp.first.cls;
+  i=pp.second;
+
+  return std::make_pair(ret, i);
+}
+
+std::pair<block, uint32_t> parse_cmd(const char* in, uint32_t size, uint32_t start)
+{
+  block ret(block::cmd);
+  uint32_t i=start;
+
+  auto tp=parse_arg(in, size, i);
+  i=skip_unread(in, size, tp.second);
+  if(word_eq("()", in, size, i))
+  {
+    i += 2;
+    auto pp = parse_function(in, size, i);
+    pp.first.shebang = tp.first.raw;
+    return pp;
+  }
+  else
+  {
+    auto pp=parse_arglist(in, size, start);
+    ret.args = pp.first;
+    i = pp.second;
+  }
+
+  return std::make_pair(ret, i);
+}
+
+std::pair<block, uint32_t> parse_case(const char* in, uint32_t size, uint32_t start)
+{
+  block ret(block::case_block);
+  uint32_t i=start;
+
+  auto pa = parse_arg(in, size, i); // case arg
+  ret.carg = pa.first;
+  i=skip_unread(in, size, pa.second);
+
+
+  if(!word_eq("in", in, size, i))
+  {
+    auto pp=parse_arg(in, size, i);
+    throw ztd::format_error("Unexpected word: '"+pp.first.raw+"', expecting 'in' after case", g_origin, in, i);
+  }
+
+  i=skip_unread(in, size, i+2);
+
+  while(i<size && !word_eq("esac", in, size, i, " \t\n;()&") )
+  {
+    // toto)
+    std::pair<arg, list_t> cc;
+    pa = parse_arg(in, size, i);
+    cc.first = pa.first;
+    i=skip_unread(in, size, pa.second);
+
+    if(in[i] != ')')
+      throw ztd::format_error( strf("Unexpected token '%c', expecting ')'", in[i]), g_origin, in, i );
+    i++;
+
+    while(true) // blocks
+    {
+      auto pc = parse_condlist(in, size, i);
+      cc.second.push_back(pc.first);
+      i=pc.second;
+
+      if(i+1>=size)
+        throw ztd::format_error("Expecting ';;'", g_origin, in, i);
+      if(in[i] == ')')
+        throw ztd::format_error( strf("Unexpected token '%c', expecting ';;'", in[i]), g_origin, in, i );
+
+      if(in[i-1] == ';' && in[i] == ';')
+      {
+        i++;
+        break;
+      }
+
+      i=skip_unread(in, size, i);
+      if(word_eq(";;", in, size, i))
+      {
+        i+=2;
+        break;
+      }
+      if(word_eq("esac", in, size, i))
+        break;
+
+    }
+    i=skip_unread(in, size, i);
+    ret.cases.push_back(cc);
+  }
+
+  if(i>=size)
+    throw ztd::format_error("Expecting 'esac'", g_origin, in, i);
+  i+=4;
+
+  return std::make_pair(ret, i);
+}
+
+// detect if brace, subshell, case or other
+std::pair<block, uint32_t> parse_block(const char* in, uint32_t size, uint32_t start)
+{
+  uint32_t i = skip_chars(in, size, start, " \n\t");
+  std::pair<block, uint32_t> ret;
+  if(in[i] == '{') // brace block
+  {
+    i++;
+    ret = parse_brace(in, size, i);
+  }
+  else if(in[i] == '(') //subshell
+  {
+    i++;
+    ret = parse_subshell(in, size, i);
+  }
+  else if(word_eq("case", in, size, i))
+  {
+    i = skip_unread(in, size, i+4);
+    ret = parse_case(in, size, i);
+  }
+  else // command
+  {
+    ret = parse_cmd(in, size, i);
+  }
+  if(ret.first.args.args.size()<=0)
+  {
+    auto pp=parse_arglist(in, size, ret.second); // in case of redirects
+    ret.second=pp.second;
+    ret.first.args=pp.first;
+  }
+  return ret;
+}
+
+// parse main
+block parse(const char* in, uint32_t size)
+{
+
+  block ret(block::main);
+  uint32_t i=0;
+  if(word_eq("#!", in, size, 0))
+  {
+    i=skip_until(in, size, 0, "\n");
+    ret.shebang=std::string(in, i);
+  }
+  i = skip_unread(in, size, i);
+  while(i<size)
+  {
+    auto pp=parse_condlist(in, size, i);
+    ret.cls.push_back(pp.first);
+    i = skip_unread(in, size, pp.second);
+  }
+  return ret;
+}
+
+std::string import_file(std::string const& path)
+{
+  std::ifstream st(path);
+  if(!st)
+    throw std::runtime_error("Cannot open stream to '"+path+'\'');
+
+  std::string ret, ln;
+  while(getline(st, ln))
+  {
+    ret += ln + '\n';
+  }
+  st.close();
+  return ret;
+}
diff --git a/src/struc.cpp b/src/struc.cpp
new file mode 100644
index 0000000..891ecce
--- /dev/null
+++ b/src/struc.cpp
@@ -0,0 +1,54 @@
+#include "struc.hpp"
+
+#include "util.hpp"
+
+block make_cmd(std::vector<std::string> args)
+{
+  block cmd(block::cmd);
+  for(auto it: args)
+  {
+    cmd.args.add(arg(it));
+  }
+  return cmd;
+}
+
+std::vector<std::string> arglist::strargs(uint32_t start)
+{
+  std::vector<std::string> ret;
+  for(uint32_t i=start; i<args.size(); i++)
+    ret.push_back(args[i].raw);
+  return ret;
+}
+
+void arg::setstring(std::string const& str)
+{
+  sa.resize(0);
+  sa.push_back(subarg(str));
+}
+
+void condlist::add(pipeline const& pl, bool or_op)
+{
+  if(this->pls.size() > 0)
+    this->or_ops.push_back(or_op);
+  this->pls.push_back(pl);
+}
+
+block* block::single_cmd()
+{
+  if(this->type == block::subshell)
+  {
+    if( cls.size() == 1 && // only one condlist
+        cls[0].pls.size() == 1 && // only one pipeline
+        cls[0].pls[0].cmds.size() == 1 && // only one block
+        cls[0].pls[0].cmds[0].type == block::cmd) // block is a command
+      return &(cls[0].pls[0].cmds[0]); // return command
+  }
+  return nullptr;
+}
+
+std::string arg::string()
+{
+  if(sa.size() > 1 || sa[0].type != subarg::string)
+    return "";
+  return sa[0].val;
+}
diff --git a/src/util.cpp b/src/util.cpp
new file mode 100644
index 0000000..85e3cef
--- /dev/null
+++ b/src/util.cpp
@@ -0,0 +1,54 @@
+#include "util.hpp"
+
+std::string indenting_string="\t";
+
+std::string indent(int n)
+{
+  std::string ret;
+  for(int i=0; i<n; i++)
+    ret += indenting_string;
+  return ret;
+}
+
+std::vector<std::string> split(std::string const& in, char c)
+{
+  uint32_t i=0,j=0;
+  std::vector<std::string> ret;
+  while(j<in.size())
+  {
+    i=in.find(c, j);
+    ret.push_back(in.substr(j,i-j));
+    j=i+1;
+  }
+  return ret;
+}
+
+std::string escape_str(std::string const& in)
+{
+  std::string ret;
+  for(uint64_t i=0; i<in.size(); i++)
+  {
+    if(in[i] == '\n')
+      ret += "\\n";
+    else if(in[i] == '\"')
+      ret += "\\\"";
+    else if(in[i] == '\t')
+      ret += "\\t";
+    else if(in[i] == '\\')
+      ret += "\\\\";
+    else
+      ret += in[i];
+  }
+  return ret;
+}
+
+std::string delete_brackets(std::string const& in)
+{
+  std::string ret;
+  for(auto it: in)
+  {
+    if(it!='[' && it!=']')
+      ret += it;
+  }
+  return ret;
+}