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MIT/X Consortium License

(C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
(C)opyright MMVI-MMVII Sander van Dijk <a dot h dot vandijk at gmail dot com>

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the 
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in 
all copies or substantial portions of the Software. 

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
DEALINGS IN THE SOFTWARE.
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//: Helper for various programming environments: run arbitrary mu code and
//: return some result in string form.

:(scenario run_interactive_code)
def main [
  1:number/raw <- copy 0
  2:address:shared:array:character <- new [1:number/raw <- copy 34]
  run-interactive 2:address:shared:array:character
  3:number/raw <- copy 1:number/raw
]
+mem: storing 34 in location 3

:(scenario run_interactive_empty)
def main [
  1:address:shared:array:character <- copy 0/unsafe
  2:address:shared:array:character <- run-interactive 1:address:shared:array:character
]
# result is null
+mem: storing 0 in location 2

//: run code in 'interactive mode', i.e. with errors off and return:
//:   stringified output in case we want to print it to screen
//:   any errors encountered
//:   simulated screen any prints went to
//:   any 'app' layer traces generated
:(before "End Primitive Recipe Declarations")
RUN_INTERACTIVE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "run-interactive", RUN_INTERACTIVE);
:(before "End Primitive Recipe Checks")
case RUN_INTERACTIVE: {
  if (SIZE(inst.ingredients) != 1) {
    raise << maybe(get(Recipe, r).name) << "'run-interactive' requires exactly one ingredient, but got " << to_original_string(inst) << '\n' << end();
    break;
  }
  if (!is_mu_string(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of 'run-interactive' should be a string, but got " << to_string(inst.ingredients.at(0)) << '\n' << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case RUN_INTERACTIVE: {
  bool new_code_pushed_to_stack = run_interactive(ingredients.at(0).at(0));
  if (!new_code_pushed_to_stack) {
    products.resize(5);
    products.at(0).push_back(0);
    products.at(1).push_back(trace_error_contents());
    products.at(2).push_back(0);
    products.at(3).push_back(trace_app_contents());
    products.at(4).push_back(1);  // completed
    run_code_end();
    break;  // done with this instruction
  }
  else {
    continue;  // not done with caller; don't increment current_step_index()
  }
}

:(before "End Globals")
bool Track_most_recent_products = false;
:(before "End Tracing")
trace_stream* Save_trace_stream = NULL;
string Save_trace_file;
:(before "End Setup")
Track_most_recent_products = false;
:(code)
// reads a string, tries to call it as code (treating it as a test), saving
// all errors.
// returns true if successfully called (no errors found during load and transform)
bool run_interactive(int address) {
  assert(contains_key(Recipe_ordinal, "interactive") && get(Recipe_ordinal, "interactive") != 0);
  // try to sandbox the run as best you can
  // todo: test this
  if (!Current_scenario) {
    for (int i = 1; i < Reserved_for_tests; ++i)
      Memory.erase(i);
  }
  string command = trim(strip_comments(read_mu_string(address)));
  Name[get(Recipe_ordinal, "interactive")].clear();
  run_code_begin(/*should_stash_snapshots*/true);
  if (command.empty()) return false;
  // don't kill the current routine on parse errors
  routine* save_current_routine = Current_routine;
  Current_routine = NULL;
  // call run(string) but without the scheduling
  load(string("recipe! interactive [\n") +
          "local-scope\n" +
          "screen:address:shared:screen <- next-ingredient\n" +
          "$start-tracking-products\n" +
          command + "\n" +
          "$stop-tracking-products\n" +
          "return screen\n" +
       "]\n");
  transform_all();
  Current_routine = save_current_routine;
  if (trace_count("error") > 0) return false;
  // now call 'sandbox' which will run 'interactive' in a separate routine,
  // and wait for it
  if (Save_trace_stream) {
    ++Save_trace_stream->callstack_depth;
    trace(9999, "trace") << "run-interactive: incrementing callstack depth to " << Save_trace_stream->callstack_depth << end();
    assert(Save_trace_stream->callstack_depth < 9000);  // 9998-101 plus cushion
  }
  Current_routine->calls.push_front(call(get(Recipe_ordinal, "sandbox")));
  return true;
}

//: Carefully update all state to exactly how it was -- including snapshots.

:(before "End Globals")
map<string, recipe_ordinal> Recipe_ordinal_snapshot_stash;
map<recipe_ordinal, recipe> Recipe_snapshot_stash;
map<string, type_ordinal> Type_ordinal_snapshot_stash;
map<type_ordinal, type_info> Type_snapshot_stash;
map<recipe_ordinal, map<string, int> > Name_snapshot_stash;
map<string, vector<recipe_ordinal> > Recipe_variants_snapshot_stash;
:(code)
void run_code_begin(bool should_stash_snapshots) {
  // stuff to undo later, in run_code_end()
  Hide_errors = true;
  Disable_redefine_checks = true;
  if (should_stash_snapshots)
    stash_snapshots();
  Save_trace_stream = Trace_stream;
  Save_trace_file = Trace_file;
  Trace_file = "";
  Trace_stream = new trace_stream;
  Trace_stream->collect_depth = App_depth;
}

void run_code_end() {
  Hide_errors = false;
  Disable_redefine_checks = false;
  delete Trace_stream;
  Trace_stream = Save_trace_stream;
  Save_trace_stream = NULL;
  Trace_file = Save_trace_file;
  Save_trace_file.clear();
  Recipe.erase(get(Recipe_ordinal, "interactive"));  // keep past sandboxes from inserting errors
  if (!Recipe_snapshot_stash.empty())
    unstash_snapshots();
}

// keep sync'd with save_snapshots and restore_snapshots
void stash_snapshots() {
  Recipe_ordinal_snapshot_stash = Recipe_ordinal_snapshot;
  Recipe_snapshot_stash = Recipe_snapshot;
  Type_ordinal_snapshot_stash = Type_ordinal_snapshot;
  Type_snapshot_stash = Type_snapshot;
  Name_snapshot_stash = Name_snapshot;
  Recipe_variants_snapshot_stash = Recipe_variants_snapshot;
  save_snapshots();
}
void unstash_snapshots() {
  restore_snapshots();
  Recipe_ordinal_snapshot = Recipe_ordinal_snapshot_stash;  Recipe_ordinal_snapshot_stash.clear();
  Recipe_snapshot = Recipe_snapshot_stash;  Recipe_snapshot_stash.clear();
  Type_ordinal_snapshot = Type_ordinal_snapshot_stash;  Type_ordinal_snapshot_stash.clear();
  Type_snapshot = Type_snapshot_stash;  Type_snapshot_stash.clear();
  Name_snapshot = Name_snapshot_stash;  Name_snapshot_stash.clear();
  Recipe_variants_snapshot = Recipe_variants_snapshot_stash;  Recipe_variants_snapshot_stash.clear();
}

:(before "End Load Recipes")
load(string(
"recipe interactive [\n") +  // just a dummy version to initialize the Recipe_ordinal and so on
"]\n" +
"recipe sandbox [\n" +
  "local-scope\n" +
  "screen:address:shared:screen <- new-fake-screen 30, 5\n" +
  "r:number/routine_id <- start-running interactive, screen\n" +
  "limit-time r, 100000/instructions\n" +
  "wait-for-routine r\n" +
  "sandbox-state:number <- routine-state r/routine_id\n" +
  "completed?:boolean <- equal sandbox-state, 1/completed\n" +
  "output:address:shared:array:character <- $most-recent-products\n" +
  "errors:address:shared:array:character <- save-errors\n" +
  "stashes:address:shared:array:character <- save-app-trace\n" +
  "$cleanup-run-interactive\n" +
  "return output, errors, screen, stashes, completed?\n" +
"]\n");

//: adjust errors in the sandbox
:(after "string maybe(string s)")
  if (s == "interactive") return "";

:(scenario run_interactive_comments)
def main [
  1:address:shared:array:character <- new [# ab
add 2, 2]
  2:address:shared:array:character <- run-interactive 1:address:shared:array:character
  3:array:character <- copy *2:address:shared:array:character
]
+mem: storing 52 in location 4

:(before "End Primitive Recipe Declarations")
_START_TRACKING_PRODUCTS,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$start-tracking-products", _START_TRACKING_PRODUCTS);
:(before "End Primitive Recipe Checks")
case _START_TRACKING_PRODUCTS: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _START_TRACKING_PRODUCTS: {
  Track_most_recent_products = true;
  break;
}

:(before "End Primitive Recipe Declarations")
_STOP_TRACKING_PRODUCTS,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$stop-tracking-products", _STOP_TRACKING_PRODUCTS);
:(before "End Primitive Recipe Checks")
case _STOP_TRACKING_PRODUCTS: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _STOP_TRACKING_PRODUCTS: {
  Track_most_recent_products = false;
  break;
}

:(before "End Primitive Recipe Declarations")
_MOST_RECENT_PRODUCTS,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$most-recent-products", _MOST_RECENT_PRODUCTS);
:(before "End Primitive Recipe Checks")
case _MOST_RECENT_PRODUCTS: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _MOST_RECENT_PRODUCTS: {
  products.resize(1);
  products.at(0).push_back(new_mu_string(Most_recent_products));
  break;
}

:(before "End Primitive Recipe Declarations")
SAVE_ERRORS,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "save-errors", SAVE_ERRORS);
:(before "End Primitive Recipe Checks")
case SAVE_ERRORS: {
  break;
}
:(before "End Primitive Recipe Implementations")
case SAVE_ERRORS: {
  products.resize(1);
  products.at(0).push_back(trace_error_contents());
  break;
}

:(before "End Primitive Recipe Declarations")
SAVE_APP_TRACE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "save-app-trace", SAVE_APP_TRACE);
:(before "End Primitive Recipe Checks")
case SAVE_APP_TRACE: {
  break;
}
:(before "End Primitive Recipe Implementations")
case SAVE_APP_TRACE: {
  products.resize(1);
  products.at(0).push_back(trace_app_contents());
  break;
}

:(before "End Primitive Recipe Declarations")
_CLEANUP_RUN_INTERACTIVE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$cleanup-run-interactive", _CLEANUP_RUN_INTERACTIVE);
:(before "End Primitive Recipe Checks")
case _CLEANUP_RUN_INTERACTIVE: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _CLEANUP_RUN_INTERACTIVE: {
  run_code_end();
  break;
}

:(scenario "run_interactive_converts_result_to_text")
def main [
  # try to interactively add 2 and 2
  1:address:shared:array:character <- new [add 2, 2]
  2:address:shared:array:character <- run-interactive 1:address:shared:array:character
  10:array:character <- copy 2:address:shared:array:character/lookup
]
# first letter in the output should be '4' in unicode
+mem: storing 52 in location 11

:(scenario "run_interactive_returns_text")
def main [
  # try to interactively add 2 and 2
  1:address:shared:array:character <- new [
    x:address:shared:array:character <- new [a]
    y:address:shared:array:character <- new [b]
    z:address:shared:array:character <- append x:address:shared:array:character, y:address:shared:array:character
  ]
  2:address:shared:array:character <- run-interactive 1:address:shared:array:character
  10:array:character <- copy 2:address:shared:array:character/lookup
]
# output contains "ab"
+mem: storing 97 in location 11
+mem: storing 98 in location 12

:(scenario "run_interactive_returns_errors")
def main [
  # run a command that generates an error
  1:address:shared:array:character <- new [x:number <- copy 34
get x:number, foo:offset]
  2:address:shared:array:character, 3:address:shared:array:character <- run-interactive 1:address:shared:array:character
  10:array:character <- copy 3:address:shared:array:character/lookup
]
# error should be "unknown element foo in container number"
+mem: storing 117 in location 11
+mem: storing 110 in location 12
+mem: storing 107 in location 13
+mem: storing 110 in location 14
# ...

:(scenario run_interactive_with_comment)
def main [
  # 2 instructions, with a comment after the first
  1:address:shared:array:number <- new [a:number <- copy 0  # abc
b:number <- copy 0
]
  2:address:shared:array:character, 3:address:shared:array:character <- run-interactive 1:address:shared:array:character
]
# no errors
+mem: storing 0 in location 3

:(before "End Globals")
string Most_recent_products;
:(before "End Setup")
Most_recent_products = "";
:(before "End of Instruction")
if (Track_most_recent_products) {
  track_most_recent_products(current_instruction(), products);
}
:(code)
void track_most_recent_products(const instruction& instruction, const vector<vector<double> >& products) {
  ostringstream out;
  for (int i = 0; i < SIZE(products); ++i) {
    // string
    if (i < SIZE(instruction.products)) {
      if (is_mu_string(instruction.products.at(i))) {
        if (!scalar(products.at(i))) {
          tb_shutdown();
          cerr << read_mu_string(trace_error_contents()) << '\n';
          cerr << SIZE(products.at(i)) << ": ";
          for (int j = 0; j < SIZE(products.at(i)); ++j)
            cerr << no_scientific(products.at(i).at(j)) << ' ';
          cerr << '\n';
        }
        assert(scalar(products.at(i)));
        out << read_mu_string(products.at(i).at(0)) << '\n';
        continue;
      }
      // End Record Product Special-cases
    }
    for (int j = 0; j < SIZE(products.at(i)); ++j)
      out << no_scientific(products.at(i).at(j)) << ' ';
    out << '\n';
  }
  Most_recent_products = out.str();
}

:(code)
string strip_comments(string in) {
  ostringstream result;
  for (int i = 0; i < SIZE(in); ++i) {
    if (in.at(i) != '#') {
      result << in.at(i);
    }
    else {
      while (i+1 < SIZE(in) && in.at(i+1) != '\n')
        ++i;
    }
  }
  return result.str();
}

int stringified_value_of_location(int address) {
  // convert to string
  ostringstream out;
  out << no_scientific(get_or_insert(Memory, address));
  return new_mu_string(out.str());
}

int trace_error_contents() {
  if (!Trace_stream) return 0;
  ostringstream out;
  for (vector<trace_line>::iterator p = Trace_stream->past_lines.begin(); p != Trace_stream->past_lines.end(); ++p) {
    if (p->label != "error") continue;
    out << p->contents;
    if (*--p->contents.end() != '\n') out << '\n';
  }
  string result = out.str();
  if (result.empty()) return 0;
  truncate(result);
  return new_mu_string(result);
}

int trace_app_contents() {
  if (!Trace_stream) return 0;
  ostringstream out;
  for (vector<trace_line>::iterator p = Trace_stream->past_lines.begin(); p != Trace_stream->past_lines.end(); ++p) {
    if (p->depth != App_depth) continue;
    out << p->contents;
    if (*--p->contents.end() != '\n') out << '\n';
  }
  string result = out.str();
  if (result.empty()) return 0;
  truncate(result);
  return new_mu_string(result);
}

void truncate(string& x) {
  if (SIZE(x) > 1024) {
    x.erase(1024);
    *x.rbegin() = '\n';
    *++x.rbegin() = '.';
    *++++x.rbegin() = '.';
  }
}

//: simpler version of run-interactive: doesn't do any running, just loads
//: recipes and reports errors.

:(before "End Primitive Recipe Declarations")
RELOAD,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "reload", RELOAD);
:(before "End Primitive Recipe Checks")
case RELOAD: {
  if (SIZE(inst.ingredients) != 1) {
    raise << maybe(get(Recipe, r).name) << "'reload' requires exactly one ingredient, but got " << to_original_string(inst) << '\n' << end();
    break;
  }
  if (!is_mu_string(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of 'reload' should be a string, but got " << inst.ingredients.at(0).original_string << '\n' << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case RELOAD: {
  // conundrum: need to support repeated reloads of the same code, but not
  // wipe out state for the current test
  // hacky solution: subset of restore_snapshots() without restoring recipes {
  // can't yet define containers in a test that runs 'reload'
  Type_ordinal = Type_ordinal_snapshot;
  Type = Type_snapshot;
  // can't yet create new specializations of shape-shifting recipes in a test
  // that runs 'reload'
  Recipe_variants = Recipe_variants_snapshot;
  Name = Name_snapshot;
  // }
  string code = read_mu_string(ingredients.at(0).at(0));
  run_code_begin(/*should_stash_snapshots*/false);
  routine* save_current_routine = Current_routine;
  Current_routine = NULL;
  vector<recipe_ordinal> recipes_reloaded = load(code);
  transform_all();
  Trace_stream->newline();  // flush trace
  Current_routine = save_current_routine;
  products.resize(1);
  products.at(0).push_back(trace_error_contents());
  run_code_end();  // wait until we're done with the trace contents
  break;
}

:(scenario reload_continues_past_error)
def main [
  local-scope
  x:address:shared:array:character <- new [recipe foo [
  get 1234:number, foo:offset
]]
  reload x
  1:number/raw <- copy 34
]
+mem: storing 34 in location 1

:(scenario reload_can_repeatedly_load_container_definitions)
# define a container and try to create it (merge requires knowing container size)
def main [
  local-scope
  x:address:shared:array:character <- new [
    container foo [
      x:number
      y:number
    ]
    recipe bar [
      local-scope
      x:foo <- merge 34, 35
    ]
  ]
  # save warning addresses in locations of type 'number' to avoid spurious changes to them due to 'abandon'
  1:number/raw <- reload x
  2:number/raw <- reload x
]
# no errors on either load
+mem: storing 0 in location 1
+mem: storing 0 in location 2