/[jscoverage]/trunk/instrument-js.cpp
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Diff of /trunk/instrument-js.cpp

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revision 346 by siliconforks, Fri Oct 24 16:16:24 2008 UTC revision 392 by siliconforks, Thu Oct 30 17:54:24 2008 UTC
# Line 22  Line 22 
22  #include "instrument-js.h"  #include "instrument-js.h"
23    
24  #include <assert.h>  #include <assert.h>
25    #include <math.h>
26  #include <stdlib.h>  #include <stdlib.h>
27  #include <string.h>  #include <string.h>
28    
29  #include <jsapi.h>  #include <jsapi.h>
30  #include <jsarena.h>  #include <jsarena.h>
31  #include <jsatom.h>  #include <jsatom.h>
32    #include <jsemit.h>
33  #include <jsexn.h>  #include <jsexn.h>
34  #include <jsfun.h>  #include <jsfun.h>
35  #include <jsinterp.h>  #include <jsinterp.h>
# Line 51  Line 53 
53    struct IfDirective * next;    struct IfDirective * next;
54  };  };
55    
56    bool jscoverage_mozilla = false;
57    
58  static bool * exclusive_directives = NULL;  static bool * exclusive_directives = NULL;
59    
60  static JSRuntime * runtime = NULL;  static JSRuntime * runtime = NULL;
# Line 67  Line 71 
71  static uint16_t num_lines = 0;  static uint16_t num_lines = 0;
72    
73  void jscoverage_set_js_version(const char * version) {  void jscoverage_set_js_version(const char * version) {
74    js_version = atoi(version);    js_version = JS_StringToVersion(version);
75      if (js_version != JSVERSION_UNKNOWN) {
76        return;
77      }
78    
79      char * end;
80      js_version = (JSVersion) strtol(version, &end, 10);
81      if ((size_t) (end - version) != strlen(version)) {
82        fatal("invalid version: %s", version);
83      }
84  }  }
85    
86  void jscoverage_init(void) {  void jscoverage_init(void) {
# Line 255  Line 268 
268    }    }
269  }  }
270    
271  static void instrument_expression(JSParseNode * node, Stream * f);  static void output_expression(JSParseNode * node, Stream * f, bool parenthesize_object_literals);
272  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
273  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
274    
# Line 272  Line 285 
285      Stream_write_string(f, "each ");      Stream_write_string(f, "each ");
286    }    }
287    Stream_write_char(f, '(');    Stream_write_char(f, '(');
288    instrument_expression(node->pn_left, f);    output_expression(node->pn_left, f, false);
289    Stream_write_char(f, ')');    Stream_write_char(f, ')');
290  }  }
291    
292    static void output_array_comprehension_or_generator_expression(JSParseNode * node, Stream * f) {
293      assert(node->pn_type == TOK_LEXICALSCOPE);
294      assert(node->pn_arity == PN_NAME);
295      JSParseNode * for_node = node->pn_expr;
296      assert(for_node->pn_type == TOK_FOR);
297      assert(for_node->pn_arity == PN_BINARY);
298      JSParseNode * p = for_node;
299      while (p->pn_type == TOK_FOR) {
300        p = p->pn_right;
301      }
302      JSParseNode * if_node = NULL;
303      if (p->pn_type == TOK_IF) {
304        if_node = p;
305        assert(if_node->pn_arity == PN_TERNARY);
306        p = if_node->pn_kid2;
307      }
308      assert(p->pn_arity == PN_UNARY);
309      p = p->pn_kid;
310      if (p->pn_type == TOK_YIELD) {
311        /* for generator expressions */
312        p = p->pn_kid;
313      }
314    
315      output_expression(p, f, false);
316      p = for_node;
317      while (p->pn_type == TOK_FOR) {
318        Stream_write_char(f, ' ');
319        output_for_in(p, f);
320        p = p->pn_right;
321      }
322      if (if_node) {
323        Stream_write_string(f, " if (");
324        output_expression(if_node->pn_kid1, f, false);
325        Stream_write_char(f, ')');
326      }
327    }
328    
329  static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {  static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
330    assert(node->pn_type == TOK_FUNCTION);    assert(node->pn_type == TOK_FUNCTION);
331    assert(node->pn_arity == PN_FUNC);    assert(node->pn_arity == PN_FUNC);
# Line 286  Line 336 
336    assert(object == &function->object);    assert(object == &function->object);
337    Stream_printf(f, "%*s", indent, "");    Stream_printf(f, "%*s", indent, "");
338    if (type == FUNCTION_NORMAL) {    if (type == FUNCTION_NORMAL) {
339      Stream_write_string(f, "function");      Stream_write_string(f, "function ");
340    }    }
341    
342    /* function name */    /* function name */
343    if (function->atom) {    if (function->atom) {
     Stream_write_char(f, ' ');  
344      print_string_atom(function->atom, f);      print_string_atom(function->atom, f);
345    }    }
346    
# Line 299  Line 348 
348    function parameters - see JS_DecompileFunction in jsapi.cpp, which calls    function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
349    js_DecompileFunction in jsopcode.cpp    js_DecompileFunction in jsopcode.cpp
350    */    */
351    Stream_write_string(f, "(");    Stream_write_char(f, '(');
352    JSArenaPool pool;    JSArenaPool pool;
353    JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);    JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
354    jsuword * local_names = NULL;    jsuword * local_names = NULL;
# Line 309  Line 358 
358        fatal("out of memory");        fatal("out of memory");
359      }      }
360    }    }
361      bool destructuring = false;
362    for (int i = 0; i < function->nargs; i++) {    for (int i = 0; i < function->nargs; i++) {
363      if (i > 0) {      if (i > 0) {
364        Stream_write_string(f, ", ");        Stream_write_string(f, ", ");
365      }      }
366      JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);      JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
367      print_string_atom(param, f);      if (param == NULL) {
368          destructuring = true;
369          JSParseNode * expression = NULL;
370          assert(node->pn_body->pn_type == TOK_LC || node->pn_body->pn_type == TOK_BODY);
371          JSParseNode * semi = node->pn_body->pn_head;
372          assert(semi->pn_type == TOK_SEMI);
373          JSParseNode * comma = semi->pn_kid;
374          assert(comma->pn_type == TOK_COMMA);
375          for (JSParseNode * p = comma->pn_head; p != NULL; p = p->pn_next) {
376            assert(p->pn_type == TOK_ASSIGN);
377            JSParseNode * rhs = p->pn_right;
378            assert(JSSTRING_LENGTH(ATOM_TO_STRING(rhs->pn_atom)) == 0);
379            if (rhs->pn_slot == i) {
380              expression = p->pn_left;
381              break;
382            }
383          }
384          assert(expression != NULL);
385          output_expression(expression, f, false);
386        }
387        else {
388          print_string_atom(param, f);
389        }
390    }    }
391    JS_FinishArenaPool(&pool);    JS_FinishArenaPool(&pool);
392    Stream_write_string(f, ") {\n");    Stream_write_string(f, ") {\n");
393    
394    /* function body */    /* function body */
395    if (function->flags & JSFUN_EXPR_CLOSURE) {    if (function->flags & JSFUN_EXPR_CLOSURE) {
396      /* expression closure */      /* expression closure - use output_statement instead of instrument_statement */
397      output_statement(node->pn_body, f, indent + 2, false);      if (node->pn_body->pn_type == TOK_BODY) {
398          assert(node->pn_body->pn_arity == PN_LIST);
399          assert(node->pn_body->pn_count == 2);
400          output_statement(node->pn_body->pn_head->pn_next, f, indent + 2, false);
401        }
402        else {
403          output_statement(node->pn_body, f, indent + 2, false);
404        }
405    }    }
406    else {    else {
407      instrument_statement(node->pn_body, f, indent + 2, false);      assert(node->pn_body->pn_type == TOK_LC);
408        assert(node->pn_body->pn_arity == PN_LIST);
409        JSParseNode * p = node->pn_body->pn_head;
410        if (destructuring) {
411          p = p->pn_next;
412        }
413        for (; p != NULL; p = p->pn_next) {
414          instrument_statement(p, f, indent + 2, false);
415        }
416    }    }
417    
418    Stream_write_string(f, "}\n");    Stream_write_char(f, '}');
419  }  }
420    
421  static void instrument_function_call(JSParseNode * node, Stream * f) {  static void instrument_function_call(JSParseNode * node, Stream * f) {
422    if (node->pn_head->pn_type == TOK_FUNCTION) {    JSParseNode * function_node = node->pn_head;
423      /* it's a generator expression */    if (function_node->pn_type == TOK_FUNCTION) {
424      JSParseNode * function_node = node->pn_head;      JSObject * object = function_node->pn_funpob->object;
425      JSParseNode * lexical_scope_node = function_node->pn_body;      assert(JS_ObjectIsFunction(context, object));
426      assert(lexical_scope_node->pn_type == TOK_LEXICALSCOPE);      JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
427      assert(lexical_scope_node->pn_arity == PN_NAME);      assert(function);
428      JSParseNode * for_node = lexical_scope_node->pn_body;      assert(object == &function->object);
429      assert(for_node->pn_type == TOK_FOR);  
430      assert(for_node->pn_arity == PN_BINARY);      if (function_node->pn_flags & TCF_GENEXP_LAMBDA) {
431      JSParseNode * if_node = NULL;        /* it's a generator expression */
432      JSParseNode * semi_node;        Stream_write_char(f, '(');
433      switch (for_node->pn_right->pn_type) {        output_array_comprehension_or_generator_expression(function_node->pn_body, f);
     case TOK_SEMI:  
       semi_node = for_node->pn_right;  
       break;  
     case TOK_IF:  
       if_node = for_node->pn_right;  
       assert(if_node->pn_arity == PN_TERNARY);  
       semi_node = if_node->pn_kid2;  
       assert(semi_node->pn_type == TOK_SEMI);  
       break;  
     default:  
       abort();  
       break;  
     }  
     assert(semi_node->pn_arity == PN_UNARY);  
     JSParseNode * yield_node = semi_node->pn_kid;  
     assert(yield_node->pn_type == TOK_YIELD);  
     Stream_write_char(f, '(');  
     instrument_expression(yield_node->pn_kid, f);  
     Stream_write_char(f, ' ');  
     output_for_in(for_node, f);  
     if (if_node) {  
       Stream_write_string(f, " if (");  
       instrument_expression(if_node->pn_kid1, f);  
434        Stream_write_char(f, ')');        Stream_write_char(f, ')');
435          return;
436      }      }
     Stream_write_char(f, ')');  
437    }    }
438    else {    output_expression(function_node, f, false);
439      instrument_expression(node->pn_head, f);    Stream_write_char(f, '(');
440      Stream_write_char(f, '(');    for (struct JSParseNode * p = function_node->pn_next; p != NULL; p = p->pn_next) {
441      for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {      if (p != node->pn_head->pn_next) {
442        if (p != node->pn_head->pn_next) {        Stream_write_string(f, ", ");
         Stream_write_string(f, ", ");  
       }  
       instrument_expression(p, f);  
443      }      }
444      Stream_write_char(f, ')');      output_expression(p, f, false);
445    }    }
446      Stream_write_char(f, ')');
447  }  }
448    
449  static void instrument_declarations(JSParseNode * list, Stream * f) {  static void instrument_declarations(JSParseNode * list, Stream * f) {
450    assert(list->pn_arity == PN_LIST);    assert(list->pn_arity == PN_LIST);
451    for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {    for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
452      switch (p->pn_type) {      if (p != list->pn_head) {
453      case TOK_NAME:        Stream_write_string(f, ", ");
       assert(p->pn_arity == PN_NAME);  
       if (p != list->pn_head) {  
         Stream_write_string(f, ", ");  
       }  
       print_string_atom(p->pn_atom, f);  
       if (p->pn_expr != NULL) {  
         Stream_write_string(f, " = ");  
         instrument_expression(p->pn_expr, f);  
       }  
       break;  
     case TOK_ASSIGN:  
     case TOK_RB:  
     case TOK_RC:  
       /* destructuring */  
       instrument_expression(p, f);  
       break;  
     default:  
       abort();  
       break;  
454      }      }
455        output_expression(p, f, false);
456    }    }
457  }  }
458    
# Line 425  Line 469 
469  TOK_INSTANCEOF  binary  TOK_INSTANCEOF  binary
470  TOK_IN          binary  TOK_IN          binary
471  */  */
472  static void instrument_expression(JSParseNode * node, Stream * f) {  static void output_expression(JSParseNode * node, Stream * f, bool parenthesize_object_literals) {
473    switch (node->pn_type) {    switch (node->pn_type) {
474    case TOK_FUNCTION:    case TOK_FUNCTION:
475        Stream_write_char(f, '(');
476      instrument_function(node, f, 0, FUNCTION_NORMAL);      instrument_function(node, f, 0, FUNCTION_NORMAL);
477        Stream_write_char(f, ')');
478      break;      break;
479    case TOK_COMMA:    case TOK_COMMA:
480      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
481        if (p != node->pn_head) {        if (p != node->pn_head) {
482          Stream_write_string(f, ", ");          Stream_write_string(f, ", ");
483        }        }
484        instrument_expression(p, f);        output_expression(p, f, parenthesize_object_literals);
485      }      }
486      break;      break;
487    case TOK_ASSIGN:    case TOK_ASSIGN:
488      instrument_expression(node->pn_left, f);      output_expression(node->pn_left, f, parenthesize_object_literals);
489      Stream_write_char(f, ' ');      Stream_write_char(f, ' ');
490      switch (node->pn_op) {      switch (node->pn_op) {
491      case JSOP_ADD:      case JSOP_ADD:
# Line 460  Line 506 
506        break;        break;
507      }      }
508      Stream_write_string(f, "= ");      Stream_write_string(f, "= ");
509      instrument_expression(node->pn_right, f);      output_expression(node->pn_right, f, false);
510      break;      break;
511    case TOK_HOOK:    case TOK_HOOK:
512      instrument_expression(node->pn_kid1, f);      output_expression(node->pn_kid1, f, parenthesize_object_literals);
513      Stream_write_string(f, "? ");      Stream_write_string(f, "? ");
514      instrument_expression(node->pn_kid2, f);      output_expression(node->pn_kid2, f, false);
515      Stream_write_string(f, ": ");      Stream_write_string(f, ": ");
516      instrument_expression(node->pn_kid3, f);      output_expression(node->pn_kid3, f, false);
517      break;      break;
518    case TOK_OR:    case TOK_OR:
519    case TOK_AND:    case TOK_AND:
# Line 483  Line 529 
529    case TOK_DIVOP:    case TOK_DIVOP:
530      switch (node->pn_arity) {      switch (node->pn_arity) {
531      case PN_BINARY:      case PN_BINARY:
532        instrument_expression(node->pn_left, f);        output_expression(node->pn_left, f, parenthesize_object_literals);
533        Stream_printf(f, " %s ", get_op(node->pn_op));        Stream_printf(f, " %s ", get_op(node->pn_op));
534        instrument_expression(node->pn_right, f);        output_expression(node->pn_right, f, false);
535        break;        break;
536      case PN_LIST:      case PN_LIST:
537        for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {        for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
538          if (p != node->pn_head) {          if (p == node->pn_head) {
539              output_expression(p, f, parenthesize_object_literals);
540            }
541            else {
542            Stream_printf(f, " %s ", get_op(node->pn_op));            Stream_printf(f, " %s ", get_op(node->pn_op));
543              output_expression(p, f, false);
544          }          }
         instrument_expression(p, f);  
545        }        }
546        break;        break;
547      default:      default:
# Line 502  Line 551 
551    case TOK_UNARYOP:    case TOK_UNARYOP:
552      switch (node->pn_op) {      switch (node->pn_op) {
553      case JSOP_NEG:      case JSOP_NEG:
554        Stream_write_char(f, '-');        Stream_write_string(f, "- ");
555        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
556        break;        break;
557      case JSOP_POS:      case JSOP_POS:
558        Stream_write_char(f, '+');        Stream_write_string(f, "+ ");
559        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
560        break;        break;
561      case JSOP_NOT:      case JSOP_NOT:
562        Stream_write_char(f, '!');        Stream_write_string(f, "! ");
563        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
564        break;        break;
565      case JSOP_BITNOT:      case JSOP_BITNOT:
566        Stream_write_char(f, '~');        Stream_write_string(f, "~ ");
567        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
568        break;        break;
569      case JSOP_TYPEOF:      case JSOP_TYPEOF:
570        Stream_write_string(f, "typeof ");        Stream_write_string(f, "typeof ");
571        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
572        break;        break;
573      case JSOP_VOID:      case JSOP_VOID:
574        Stream_write_string(f, "void ");        Stream_write_string(f, "void ");
575        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
576        break;        break;
577      default:      default:
578        abort();        fatal_source(file_id, node->pn_pos.begin.lineno, "unknown operator (%d)", node->pn_op);
579        break;        break;
580      }      }
581      break;      break;
# Line 540  Line 589 
589      case JSOP_INCPROP:      case JSOP_INCPROP:
590      case JSOP_INCELEM:      case JSOP_INCELEM:
591        Stream_write_string(f, "++");        Stream_write_string(f, "++");
592        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
593        break;        break;
594      case JSOP_DECNAME:      case JSOP_DECNAME:
595      case JSOP_DECPROP:      case JSOP_DECPROP:
596      case JSOP_DECELEM:      case JSOP_DECELEM:
597        Stream_write_string(f, "--");        Stream_write_string(f, "--");
598        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, false);
599        break;        break;
600      case JSOP_NAMEINC:      case JSOP_NAMEINC:
601      case JSOP_PROPINC:      case JSOP_PROPINC:
602      case JSOP_ELEMINC:      case JSOP_ELEMINC:
603        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, parenthesize_object_literals);
604        Stream_write_string(f, "++");        Stream_write_string(f, "++");
605        break;        break;
606      case JSOP_NAMEDEC:      case JSOP_NAMEDEC:
607      case JSOP_PROPDEC:      case JSOP_PROPDEC:
608      case JSOP_ELEMDEC:      case JSOP_ELEMDEC:
609        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, parenthesize_object_literals);
610        Stream_write_string(f, "--");        Stream_write_string(f, "--");
611        break;        break;
612      default:      default:
# Line 571  Line 620 
620      break;      break;
621    case TOK_DELETE:    case TOK_DELETE:
622      Stream_write_string(f, "delete ");      Stream_write_string(f, "delete ");
623      instrument_expression(node->pn_kid, f);      output_expression(node->pn_kid, f, false);
624      break;      break;
625    case TOK_DOT:    case TOK_DOT:
626        /* numeric literals must be parenthesized */
627        switch (node->pn_expr->pn_type) {
628        case TOK_NUMBER:
629          Stream_write_char(f, '(');
630          output_expression(node->pn_expr, f, false);
631          Stream_write_char(f, ')');
632          break;
633        default:
634          output_expression(node->pn_expr, f, true);
635          break;
636        }
637      /*      /*
638      This may have originally been x['foo-bar'].  Because the string 'foo-bar'      This may have originally been x['foo-bar'].  Because the string 'foo-bar'
639      contains illegal characters, we have to use the subscript syntax instead of      contains illegal characters, we have to use the subscript syntax instead of
640      the dot syntax.      the dot syntax.
641      */      */
     instrument_expression(node->pn_expr, f);  
642      assert(ATOM_IS_STRING(node->pn_atom));      assert(ATOM_IS_STRING(node->pn_atom));
643      {      {
644        JSString * s = ATOM_TO_STRING(node->pn_atom);        JSString * s = ATOM_TO_STRING(node->pn_atom);
645        bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);        bool must_quote;
646        if (! is_keyword && js_IsIdentifier(s)) {        if (JSSTRING_LENGTH(s) == 0) {
647          Stream_write_char(f, '.');          must_quote = true;
648          print_string_atom(node->pn_atom, f);        }
649          else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) {
650            must_quote = true;
651          }
652          else if (! js_IsIdentifier(s)) {
653            must_quote = true;
654        }        }
655        else {        else {
656            must_quote = false;
657          }
658          if (must_quote) {
659          Stream_write_char(f, '[');          Stream_write_char(f, '[');
660          print_quoted_string_atom(node->pn_atom, f);          print_quoted_string_atom(node->pn_atom, f);
661          Stream_write_char(f, ']');          Stream_write_char(f, ']');
662        }        }
663          else {
664            Stream_write_char(f, '.');
665            print_string_atom(node->pn_atom, f);
666          }
667      }      }
668      break;      break;
669    case TOK_LB:    case TOK_LB:
670      instrument_expression(node->pn_left, f);      output_expression(node->pn_left, f, false);
671      Stream_write_char(f, '[');      Stream_write_char(f, '[');
672      instrument_expression(node->pn_right, f);      output_expression(node->pn_right, f, false);
673      Stream_write_char(f, ']');      Stream_write_char(f, ']');
674      break;      break;
675    case TOK_LP:    case TOK_LP:
# Line 612  Line 683 
683        }        }
684        /* TOK_COMMA is a special case: a hole in the array */        /* TOK_COMMA is a special case: a hole in the array */
685        if (p->pn_type != TOK_COMMA) {        if (p->pn_type != TOK_COMMA) {
686          instrument_expression(p, f);          output_expression(p, f, false);
687        }        }
688      }      }
689      if (node->pn_extra == PNX_ENDCOMMA) {      if (node->pn_extra == PNX_ENDCOMMA) {
# Line 621  Line 692 
692      Stream_write_char(f, ']');      Stream_write_char(f, ']');
693      break;      break;
694    case TOK_RC:    case TOK_RC:
695        if (parenthesize_object_literals) {
696          Stream_write_char(f, '(');
697        }
698      Stream_write_char(f, '{');      Stream_write_char(f, '{');
699      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
700        assert(p->pn_type == TOK_COLON);        if (p->pn_type != TOK_COLON) {
701            fatal_source(file_id, p->pn_pos.begin.lineno, "unsupported node type (%d)", p->pn_type);
702          }
703        if (p != node->pn_head) {        if (p != node->pn_head) {
704          Stream_write_string(f, ", ");          Stream_write_string(f, ", ");
705        }        }
# Line 638  Line 714 
714          else {          else {
715            Stream_write_string(f, "set ");            Stream_write_string(f, "set ");
716          }          }
717          instrument_expression(p->pn_left, f);          output_expression(p->pn_left, f, false);
718            Stream_write_char(f, ' ');
719          if (p->pn_right->pn_type != TOK_FUNCTION) {          if (p->pn_right->pn_type != TOK_FUNCTION) {
720            fatal("parse error: expected function");            fatal_source(file_id, p->pn_pos.begin.lineno, "expected function");
721          }          }
722          instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);          instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
723          break;          break;
724        default:        default:
725          instrument_expression(p->pn_left, f);          output_expression(p->pn_left, f, false);
726          Stream_write_string(f, ": ");          Stream_write_string(f, ": ");
727          instrument_expression(p->pn_right, f);          output_expression(p->pn_right, f, false);
728          break;          break;
729        }        }
730      }      }
731      Stream_write_char(f, '}');      Stream_write_char(f, '}');
732        if (parenthesize_object_literals) {
733          Stream_write_char(f, ')');
734        }
735      break;      break;
736    case TOK_RP:    case TOK_RP:
737      Stream_write_char(f, '(');      Stream_write_char(f, '(');
738      instrument_expression(node->pn_kid, f);      output_expression(node->pn_kid, f, false);
739      Stream_write_char(f, ')');      Stream_write_char(f, ')');
740      break;      break;
741    case TOK_NAME:    case TOK_NAME:
742      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
743        if (node->pn_expr != NULL) {
744          Stream_write_string(f, " = ");
745          output_expression(node->pn_expr, f, false);
746        }
747      break;      break;
748    case TOK_STRING:    case TOK_STRING:
749      print_quoted_string_atom(node->pn_atom, f);      print_quoted_string_atom(node->pn_atom, f);
# Line 681  Line 765 
765      To keep the output simple, special-case zero.      To keep the output simple, special-case zero.
766      */      */
767      if (node->pn_dval == 0.0) {      if (node->pn_dval == 0.0) {
768        Stream_write_string(f, "0");        if (signbit(node->pn_dval)) {
769            Stream_write_string(f, "-0");
770          }
771          else {
772            Stream_write_string(f, "0");
773          }
774        }
775        else if (node->pn_dval == INFINITY) {
776          Stream_write_string(f, "Number.POSITIVE_INFINITY");
777        }
778        else if (node->pn_dval == -INFINITY) {
779          Stream_write_string(f, "Number.NEGATIVE_INFINITY");
780        }
781        else if (isnan(node->pn_dval)) {
782          Stream_write_string(f, "Number.NaN");
783      }      }
784      else {      else {
785        Stream_printf(f, "%.15g", node->pn_dval);        Stream_printf(f, "%.15g", node->pn_dval);
# Line 707  Line 805 
805      }      }
806      break;      break;
807    case TOK_INSTANCEOF:    case TOK_INSTANCEOF:
808      instrument_expression(node->pn_left, f);      output_expression(node->pn_left, f, parenthesize_object_literals);
809      Stream_write_string(f, " instanceof ");      Stream_write_string(f, " instanceof ");
810      instrument_expression(node->pn_right, f);      output_expression(node->pn_right, f, false);
811      break;      break;
812    case TOK_IN:    case TOK_IN:
813      instrument_expression(node->pn_left, f);      output_expression(node->pn_left, f, false);
814      Stream_write_string(f, " in ");      Stream_write_string(f, " in ");
815      instrument_expression(node->pn_right, f);      output_expression(node->pn_right, f, false);
816      break;      break;
817    case TOK_LEXICALSCOPE:    case TOK_LEXICALSCOPE:
818      assert(node->pn_arity == PN_NAME);      assert(node->pn_arity == PN_NAME);
# Line 725  Line 823 
823      assert(node->pn_expr->pn_left->pn_arity == PN_LIST);      assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
824      instrument_declarations(node->pn_expr->pn_left, f);      instrument_declarations(node->pn_expr->pn_left, f);
825      Stream_write_string(f, ") ");      Stream_write_string(f, ") ");
826      instrument_expression(node->pn_expr->pn_right, f);      output_expression(node->pn_expr->pn_right, f, true);
827      break;      break;
828    case TOK_YIELD:    case TOK_YIELD:
829      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
830      Stream_write_string(f, "yield ");      Stream_write_string(f, "yield");
831      instrument_expression(node->pn_kid, f);      if (node->pn_kid != NULL) {
832          Stream_write_char(f, ' ');
833          output_expression(node->pn_kid, f, true);
834        }
835      break;      break;
836    case TOK_ARRAYCOMP:    case TOK_ARRAYCOMP:
837      assert(node->pn_arity == PN_LIST);      assert(node->pn_arity == PN_LIST);
# Line 747  Line 848 
848          abort();          abort();
849          break;          break;
850        }        }
       assert(block_node->pn_type == TOK_LEXICALSCOPE);  
       assert(block_node->pn_arity == PN_NAME);  
       JSParseNode * for_node = block_node->pn_expr;  
       assert(for_node->pn_type == TOK_FOR);  
       assert(for_node->pn_arity == PN_BINARY);  
       JSParseNode * if_node = NULL;  
       JSParseNode * push_node;  
       switch (for_node->pn_right->pn_type) {  
       case TOK_ARRAYPUSH:  
         push_node = for_node->pn_right;  
         assert(push_node->pn_arity == PN_UNARY);  
         break;  
       case TOK_IF:  
         if_node = for_node->pn_right;  
         assert(if_node->pn_arity == PN_TERNARY);  
         push_node = if_node->pn_kid2;  
         break;  
       default:  
         abort();  
         break;  
       }  
851        Stream_write_char(f, '[');        Stream_write_char(f, '[');
852        instrument_expression(push_node->pn_kid, f);        output_array_comprehension_or_generator_expression(block_node, f);
       Stream_write_char(f, ' ');  
       output_for_in(for_node, f);  
       if (if_node) {  
         Stream_write_string(f, " if (");  
         instrument_expression(if_node->pn_kid1, f);  
         Stream_write_char(f, ')');  
       }  
853        Stream_write_char(f, ']');        Stream_write_char(f, ']');
854      }      }
855      break;      break;
# Line 791  Line 864 
864      instrument_declarations(node, f);      instrument_declarations(node, f);
865      break;      break;
866    default:    default:
867      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported node type (%d)", node->pn_type);
868    }    }
869  }  }
870    
# Line 799  Line 872 
872    switch (node->pn_type) {    switch (node->pn_type) {
873    case TOK_FUNCTION:    case TOK_FUNCTION:
874      instrument_function(node, f, indent, FUNCTION_NORMAL);      instrument_function(node, f, indent, FUNCTION_NORMAL);
875        Stream_write_char(f, '\n');
876      break;      break;
877    case TOK_LC:    case TOK_LC:
878      assert(node->pn_arity == PN_LIST);      assert(node->pn_arity == PN_LIST);
# Line 820  Line 894 
894      uint16_t line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
895      if (! is_jscoverage_if) {      if (! is_jscoverage_if) {
896        if (line > num_lines) {        if (line > num_lines) {
897          fatal("%s: script contains more than 65,535 lines", file_id);          fatal("file %s contains more than 65,535 lines", file_id);
898        }        }
899        if (line >= 2 && exclusive_directives[line - 2]) {        if (line >= 2 && exclusive_directives[line - 2]) {
900          is_jscoverage_if = true;          is_jscoverage_if = true;
# Line 829  Line 903 
903    
904      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
905      Stream_write_string(f, "if (");      Stream_write_string(f, "if (");
906      instrument_expression(node->pn_kid1, f);      output_expression(node->pn_kid1, f, false);
907      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
908      if (is_jscoverage_if && node->pn_kid3) {      if (is_jscoverage_if && node->pn_kid3) {
909        uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;        uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
# Line 866  Line 940 
940      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
941      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
942      Stream_write_string(f, "switch (");      Stream_write_string(f, "switch (");
943      instrument_expression(node->pn_left, f);      output_expression(node->pn_left, f, false);
944      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
945      for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {      {
946        Stream_printf(f, "%*s", indent, "");        JSParseNode * list = node->pn_right;
947        switch (p->pn_type) {        if (list->pn_type == TOK_LEXICALSCOPE) {
948        case TOK_CASE:          list = list->pn_expr;
949          Stream_write_string(f, "case ");        }
950          instrument_expression(p->pn_left, f);        for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
951          Stream_write_string(f, ":\n");          Stream_printf(f, "%*s", indent, "");
952          break;          switch (p->pn_type) {
953        case TOK_DEFAULT:          case TOK_CASE:
954          Stream_write_string(f, "default:\n");            Stream_write_string(f, "case ");
955          break;            output_expression(p->pn_left, f, false);
956        default:            Stream_write_string(f, ":\n");
957          abort();            break;
958          break;          case TOK_DEFAULT:
959              Stream_write_string(f, "default:\n");
960              break;
961            default:
962              abort();
963              break;
964            }
965            instrument_statement(p->pn_right, f, indent + 2, false);
966        }        }
       instrument_statement(p->pn_right, f, indent + 2, false);  
967      }      }
968      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
969      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
# Line 896  Line 976 
976      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
977      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
978      Stream_write_string(f, "while (");      Stream_write_string(f, "while (");
979      instrument_expression(node->pn_left, f);      output_expression(node->pn_left, f, false);
980      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
981      instrument_statement(node->pn_right, f, indent + 2, false);      instrument_statement(node->pn_right, f, indent + 2, false);
982      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
# Line 909  Line 989 
989      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
990      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
991      Stream_write_string(f, "while (");      Stream_write_string(f, "while (");
992      instrument_expression(node->pn_right, f);      output_expression(node->pn_right, f, false);
993      Stream_write_string(f, ");\n");      Stream_write_string(f, ");\n");
994      break;      break;
995    case TOK_FOR:    case TOK_FOR:
# Line 926  Line 1006 
1006        assert(node->pn_left->pn_arity == PN_TERNARY);        assert(node->pn_left->pn_arity == PN_TERNARY);
1007        Stream_write_string(f, "for (");        Stream_write_string(f, "for (");
1008        if (node->pn_left->pn_kid1) {        if (node->pn_left->pn_kid1) {
1009          instrument_expression(node->pn_left->pn_kid1, f);          output_expression(node->pn_left->pn_kid1, f, false);
1010        }        }
1011        Stream_write_string(f, ";");        Stream_write_string(f, ";");
1012        if (node->pn_left->pn_kid2) {        if (node->pn_left->pn_kid2) {
1013          Stream_write_char(f, ' ');          Stream_write_char(f, ' ');
1014          instrument_expression(node->pn_left->pn_kid2, f);          output_expression(node->pn_left->pn_kid2, f, false);
1015        }        }
1016        Stream_write_string(f, ";");        Stream_write_string(f, ";");
1017        if (node->pn_left->pn_kid3) {        if (node->pn_left->pn_kid3) {
1018          Stream_write_char(f, ' ');          Stream_write_char(f, ' ');
1019          instrument_expression(node->pn_left->pn_kid3, f);          output_expression(node->pn_left->pn_kid3, f, false);
1020        }        }
1021        Stream_write_char(f, ')');        Stream_write_char(f, ')');
1022        break;        break;
# Line 952  Line 1032 
1032      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1033      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1034      Stream_write_string(f, "throw ");      Stream_write_string(f, "throw ");
1035      instrument_expression(node->pn_u.unary.kid, f);      output_expression(node->pn_u.unary.kid, f, false);
1036      Stream_write_string(f, ";\n");      Stream_write_string(f, ";\n");
1037      break;      break;
1038    case TOK_TRY:    case TOK_TRY:
# Line 969  Line 1049 
1049          assert(catch->pn_type == TOK_CATCH);          assert(catch->pn_type == TOK_CATCH);
1050          Stream_printf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
1051          Stream_write_string(f, "catch (");          Stream_write_string(f, "catch (");
1052          /* this may not be a name - destructuring assignment */          output_expression(catch->pn_kid1, f, false);
         /*  
         assert(catch->pn_kid1->pn_arity == PN_NAME);  
         print_string_atom(catch->pn_kid1->pn_atom, f);  
         */  
         instrument_expression(catch->pn_kid1, f);  
1053          if (catch->pn_kid2) {          if (catch->pn_kid2) {
1054            Stream_write_string(f, " if ");            Stream_write_string(f, " if ");
1055            instrument_expression(catch->pn_kid2, f);            output_expression(catch->pn_kid2, f, false);
1056          }          }
1057          Stream_write_string(f, ") {\n");          Stream_write_string(f, ") {\n");
1058          instrument_statement(catch->pn_kid3, f, indent + 2, false);          instrument_statement(catch->pn_kid3, f, indent + 2, false);
# Line 1012  Line 1087 
1087      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
1088      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1089      Stream_write_string(f, "with (");      Stream_write_string(f, "with (");
1090      instrument_expression(node->pn_left, f);      output_expression(node->pn_left, f, false);
1091      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
1092      instrument_statement(node->pn_right, f, indent + 2, false);      instrument_statement(node->pn_right, f, indent + 2, false);
1093      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
# Line 1020  Line 1095 
1095      break;      break;
1096    case TOK_VAR:    case TOK_VAR:
1097      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1098      instrument_expression(node, f);      output_expression(node, f, false);
1099      Stream_write_string(f, ";\n");      Stream_write_string(f, ";\n");
1100      break;      break;
1101    case TOK_RETURN:    case TOK_RETURN:
# Line 1029  Line 1104 
1104      Stream_write_string(f, "return");      Stream_write_string(f, "return");
1105      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1106        Stream_write_char(f, ' ');        Stream_write_char(f, ' ');
1107        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, true);
1108      }      }
1109      Stream_write_string(f, ";\n");      Stream_write_string(f, ";\n");
1110      break;      break;
# Line 1037  Line 1112 
1112      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1113      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1114      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1115        instrument_expression(node->pn_kid, f);        output_expression(node->pn_kid, f, true);
1116      }      }
1117      Stream_write_string(f, ";\n");      Stream_write_string(f, ";\n");
1118      break;      break;
1119    case TOK_COLON:    case TOK_COLON:
1120      {
1121      assert(node->pn_arity == PN_NAME);      assert(node->pn_arity == PN_NAME);
     /*  
     This one is tricky: can't output instrumentation between the label and the  
     statement it's supposed to label ...  
     */  
1122      Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");      Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1123      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
1124      Stream_write_string(f, ":\n");      Stream_write_string(f, ":\n");
1125      /*      JSParseNode * labelled = node->pn_expr;
1126      ... use output_statement instead of instrument_statement.      if (labelled->pn_type == TOK_LEXICALSCOPE) {
1127      */        labelled = labelled->pn_expr;
1128      output_statement(node->pn_expr, f, indent, false);      }
1129        if (labelled->pn_type == TOK_LC) {
1130          /* labelled block */
1131          Stream_printf(f, "%*s", indent, "");
1132          Stream_write_string(f, "{\n");
1133          instrument_statement(labelled, f, indent + 2, false);
1134          Stream_printf(f, "%*s", indent, "");
1135          Stream_write_string(f, "}\n");
1136        }
1137        else {
1138          /*
1139          This one is tricky: can't output instrumentation between the label and the
1140          statement it's supposed to label, so use output_statement instead of
1141          instrument_statement.
1142          */
1143          output_statement(labelled, f, indent, false);
1144        }
1145      break;      break;
1146      }
1147    case TOK_LEXICALSCOPE:    case TOK_LEXICALSCOPE:
1148      /* let statement */      /* let statement */
1149      assert(node->pn_arity == PN_NAME);      assert(node->pn_arity == PN_NAME);
# Line 1097  Line 1186 
1186      case PN_LIST:      case PN_LIST:
1187        /* let definition */        /* let definition */
1188        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1189        instrument_expression(node, f);        output_expression(node, f, false);
1190        Stream_write_string(f, ";\n");        Stream_write_string(f, ";\n");
1191        break;        break;
1192      default:      default:
# Line 1105  Line 1194 
1194        break;        break;
1195      }      }
1196      break;      break;
1197      case TOK_DEBUGGER:
1198        Stream_printf(f, "%*s", indent, "");
1199        Stream_write_string(f, "debugger;\n");
1200        break;
1201    default:    default:
1202      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported node type (%d)", node->pn_type);
1203    }    }
1204  }  }
1205    
# Line 1119  Line 1212 
1212    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1213      uint16_t line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
1214      if (line > num_lines) {      if (line > num_lines) {
1215        fatal("%s: script contains more than 65,535 lines", file_id);        fatal("file %s contains more than 65,535 lines", file_id);
1216      }      }
1217    
1218      /* the root node has line number 0 */      /* the root node has line number 0 */
# Line 1167  Line 1260 
1260  }  }
1261    
1262  static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {  static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1263    fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);    warn_source(file_id, report->lineno, "%s", message);
1264  }  }
1265    
1266  void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {  void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
# Line 1176  Line 1269 
1269    /* parse the javascript */    /* parse the javascript */
1270    JSParseContext parse_context;    JSParseContext parse_context;
1271    if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {    if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1272      fatal("cannot create token stream from file: %s", file_id);      fatal("cannot create token stream from file %s", file_id);
1273    }    }
1274    JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);    JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1275    JSParseNode * node = js_ParseScript(context, global, &parse_context);    JSParseNode * node = js_ParseScript(context, global, &parse_context);
1276    if (node == NULL) {    if (node == NULL) {
1277      js_ReportUncaughtException(context);      js_ReportUncaughtException(context);
1278      fatal("parse error in file: %s", file_id);      fatal("parse error in file %s", file_id);
1279    }    }
1280    JS_SetErrorReporter(context, old_error_reporter);    JS_SetErrorReporter(context, old_error_reporter);
1281    num_lines = node->pn_pos.end.lineno;    num_lines = node->pn_pos.end.lineno;
# Line 1203  Line 1296 
1296    size_t i = 0;    size_t i = 0;
1297    while (i < num_characters) {    while (i < num_characters) {
1298      if (line_number == UINT16_MAX) {      if (line_number == UINT16_MAX) {
1299        fatal("%s: script has more than 65,535 lines", file_id);        fatal("file %s contains more than 65,535 lines", file_id);
1300      }      }
1301      line_number++;      line_number++;
1302      size_t line_start = i;      size_t line_start = i;
# Line 1270  Line 1363 
1363    
1364    /* write line number info to the output */    /* write line number info to the output */
1365    Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");    Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1366    Stream_write_string(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");    if (jscoverage_mozilla) {
1367    Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");      Stream_write_string(output, "try {\n");
1368        Stream_write_string(output, "  Components.utils.import('resource://gre/modules/jscoverage.jsm');\n");
1369        Stream_printf(output, "  dump('%s: successfully imported jscoverage module\\n');\n", id);
1370        Stream_write_string(output, "}\n");
1371        Stream_write_string(output, "catch (e) {\n");
1372        Stream_write_string(output, "  _$jscoverage = {};\n");
1373        Stream_printf(output, "  dump('%s: failed to import jscoverage module - coverage not available for this file\\n');\n", id);
1374        Stream_write_string(output, "}\n");
1375      }
1376      else {
1377        Stream_write_string(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");
1378        Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1379      }
1380    Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);    Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1381    Stream_printf(output, "  _$jscoverage['%s'] = [];\n", file_id);    Stream_printf(output, "  _$jscoverage['%s'] = [];\n", file_id);
1382    for (int i = 0; i < num_lines; i++) {    for (int i = 0; i < num_lines; i++) {

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