forth/ForthTests.cpp - platform/external/skia - Gitiles


 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Forth.h"
 #include "SkString.h"

 class Reporter {
 public:
     int fFailureCount;

     Reporter() : fFailureCount(0) {}
     void reportFailure(const char expression[], const char file[], int line);
     void reportFailure(const char msg[]);
 };

 typedef void (*ForthWordTestProc)(ForthWord*, ForthEngine*, Reporter*);

 #define FORTH_ASSERT(reporter, expression)      \
     do {                                        \
         if (!(expression)) {                    \
             reporter->reportFailure(#expression, __FILE__, __LINE__);   \
         }                                       \
     } while (0)

 static void drop_test0(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(-17);
     word->exec(fe);
     FORTH_ASSERT(reporter, 0 == fe->depth());
 }

 static void drop_test1(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(-17);
     fe->push(93);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, -17 == fe->peek(0));
 }

 static void dup_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(-17);
     word->exec(fe);
     FORTH_ASSERT(reporter, 2 == fe->depth());
     FORTH_ASSERT(reporter, -17 == fe->peek(0));
     FORTH_ASSERT(reporter, -17 == fe->peek(1));
 }

 static void swap_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(-17);
     fe->push(42);
     word->exec(fe);
     FORTH_ASSERT(reporter, 2 == fe->depth());
     FORTH_ASSERT(reporter, -17 == fe->peek(0));
     FORTH_ASSERT(reporter, 42 == fe->peek(1));
 }

 static void over_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     word->exec(fe);
     FORTH_ASSERT(reporter, 3 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->peek(0));
     FORTH_ASSERT(reporter, 2 == fe->peek(1));
     FORTH_ASSERT(reporter, 1 == fe->peek(2));
 }

 static void rot_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     fe->push(3);
     word->exec(fe);
     FORTH_ASSERT(reporter, 3 == fe->depth());
     FORTH_ASSERT(reporter, 2 == fe->peek(2));
     FORTH_ASSERT(reporter, 3 == fe->peek(1));
     FORTH_ASSERT(reporter, 1 == fe->peek(0));
 }

 static void rrot_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     fe->push(3);
     word->exec(fe);
     FORTH_ASSERT(reporter, 3 == fe->depth());
     FORTH_ASSERT(reporter, 2 == fe->peek(0));
     FORTH_ASSERT(reporter, 1 == fe->peek(1));
     FORTH_ASSERT(reporter, 3 == fe->peek(2));
 }

 static void swap2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     fe->push(3);
     fe->push(4);
     word->exec(fe);
     FORTH_ASSERT(reporter, 4 == fe->depth());
     FORTH_ASSERT(reporter, 2 == fe->peek(0));
     FORTH_ASSERT(reporter, 1 == fe->peek(1));
     FORTH_ASSERT(reporter, 4 == fe->peek(2));
     FORTH_ASSERT(reporter, 3 == fe->peek(3));
 }

 static void dup2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     word->exec(fe);
     FORTH_ASSERT(reporter, 4 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->peek(3));
     FORTH_ASSERT(reporter, 2 == fe->peek(2));
     FORTH_ASSERT(reporter, 1 == fe->peek(1));
     FORTH_ASSERT(reporter, 2 == fe->peek(0));
 }

 static void over2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     fe->push(3);
     fe->push(4);
     word->exec(fe);
     FORTH_ASSERT(reporter, 6 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->peek(5));
     FORTH_ASSERT(reporter, 2 == fe->peek(4));
     FORTH_ASSERT(reporter, 3 == fe->peek(3));
     FORTH_ASSERT(reporter, 4 == fe->peek(2));
     FORTH_ASSERT(reporter, 1 == fe->peek(1));
     FORTH_ASSERT(reporter, 2 == fe->peek(0));
 }

 static void drop2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     fe->push(3);
     fe->push(4);
     word->exec(fe);
     FORTH_ASSERT(reporter, 2 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->peek(1));
     FORTH_ASSERT(reporter, 2 == fe->peek(0));
 }

 //////////////////////////////////////////////////////////////////////////////

 static void iadd_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(35);
     fe->push(99);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 134 == fe->top());
     fe->push(-135);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, -1 == fe->top());
 }

 static void isub_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(35);
     fe->push(99);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 35-99 == fe->top());
 }

 static void imul_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(15);
     fe->push(-20);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, -300 == fe->top());
     fe->push(0);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 0 == fe->top());
 }

 static void idiv_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(100);
     fe->push(25);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 4 == fe->top());
     fe->setTop(10);
     fe->push(-3);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, -3 == fe->top());
     fe->setTop(-1);
     fe->push(-1);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->top());
 }

 static void imod_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(10);
     fe->push(3);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->top());
     fe->push(5);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->top());
 }

 static void idivmod_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(10);
     fe->push(3);
     word->exec(fe);
     FORTH_ASSERT(reporter, 2 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->peek(1));
     FORTH_ASSERT(reporter, 3 == fe->peek(0));
 }

 static void idot_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(1);
     fe->push(2);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 1 == fe->top());
 }

 static void iabs_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(10);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 10 == fe->top());
     fe->setTop(-10);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 10 == fe->top());
 }

 static void inegate_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(10);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, -10 == fe->top());
     fe->setTop(-10);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 10 == fe->top());
 }

 static void imin_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(10);
     fe->push(3);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 3 == fe->top());
     fe->push(-10);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, -10 == fe->top());
 }

 static void imax_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(10);
     fe->push(3);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 10 == fe->top());
     fe->push(-10);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 10 == fe->top());
 }

 ///////////////////////////////////////////////////////////////////////////////

 static void logical_and_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     const static int data[] = {
         0, 0, 0,
         2, 0, 0,
         0, -1, 0,
         1, 5, -1
     };
     for (size_t i = 0; i < SK_ARRAY_COUNT(data)/3; i++) {
         fe->push(data[i*3 + 0]);
         fe->push(data[i*3 + 1]);
         word->exec(fe);
         FORTH_ASSERT(reporter, 1 == fe->depth());
         FORTH_ASSERT(reporter, data[i*3 + 2] == fe->top());
         fe->pop();
     }
 }

 static void logical_or_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     const static int data[] = {
         0, 0, 0,
         2, 0, -1,
         0, -1, -1,
         1, 5, -1
     };
     for (size_t i = 0; i < SK_ARRAY_COUNT(data)/3; i++) {
         fe->push(data[i*3 + 0]);
         fe->push(data[i*3 + 1]);
         word->exec(fe);
         FORTH_ASSERT(reporter, 1 == fe->depth());
         FORTH_ASSERT(reporter, data[i*3 + 2] == fe->top());
         fe->pop();
     }
 }

 static void logical_not_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     const static int data[] = {
         0, -1,
         5, 0,
         -1, 0
     };
     for (size_t i = 0; i < SK_ARRAY_COUNT(data)/2; i++) {
         fe->push(data[i*2 + 0]);
         word->exec(fe);
         FORTH_ASSERT(reporter, 1 == fe->depth());
         FORTH_ASSERT(reporter, data[i*2 + 1] == fe->top());
         fe->pop();
     }
 }

 static void if_dup_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
     fe->push(10);
     word->exec(fe);
     FORTH_ASSERT(reporter, 2 == fe->depth());
     FORTH_ASSERT(reporter, 10 == fe->peek(1));
     FORTH_ASSERT(reporter, 10 == fe->peek(0));
     fe->pop();
     fe->pop();
     fe->push(0);
     word->exec(fe);
     FORTH_ASSERT(reporter, 1 == fe->depth());
     FORTH_ASSERT(reporter, 0 == fe->top());
 }

 static const struct {
     const char*         fName;
     ForthWordTestProc   fProc;
 } gRecs[] = {
     { "DROP",   drop_test0 },   { "DROP",   drop_test1 },
     { "DUP",    dup_test },
     { "SWAP",   swap_test },
     { "OVER",   over_test },
     { "ROT",    rot_test },
     { "-ROT",   rrot_test },
     { "2SWAP",  swap2_test },
     { "2DUP",   dup2_test },
     { "2OVER",  over2_test },
     { "2DROP",  drop2_test },

     { "+",      iadd_test },
     { "-",      isub_test },
     { "*",      imul_test },
     { "/",      idiv_test },
     { "MOD",    imod_test },
     { "/MOD",   idivmod_test },

 //    { ".",      idot_test },
     { "ABS",    iabs_test },
     { "NEGATE", inegate_test },
     { "MIN",    imin_test },
     { "MAX",    imax_test },

     { "AND",    logical_and_test },
     { "OR",     logical_or_test },
     { "0=",     logical_not_test },
     { "?DUP",   if_dup_test },
 };

 ///////////////////////////////////////////////////////////////////////////////

 void Reporter::reportFailure(const char expression[], const char file[],
                              int line) {
     SkDebugf("failed %s:%d: %s\n", file, line, expression);
     fFailureCount += 1;
 }

 void Reporter::reportFailure(const char msg[]) {
     SkDebugf("%s\n");
     fFailureCount += 1;
 }

 void Forth_test_stdwords(bool verbose);
 void Forth_test_stdwords(bool verbose) {
     ForthEnv env;
     Reporter reporter;

     for (size_t i = 0; i < SK_ARRAY_COUNT(gRecs); i++) {
         ForthEngine engine(NULL);

         ForthWord* word = env.findWord(gRecs[i].fName);
         if (NULL == word) {
             SkString str;
             str.printf("--- can't find stdword %d", gRecs[i].fName);
             reporter.reportFailure(str.c_str());
         } else {
             if (verbose) {
                 SkDebugf("--- testing %s %p\n", gRecs[i].fName, word);
             }
             gRecs[i].fProc(word, &engine, &reporter);
         }
     }

     if (0 == reporter.fFailureCount) {
         SkDebugf("--- success!\n");
     } else {
         SkDebugf("--- %d failures\n", reporter.fFailureCount);
     }
 }

	/*
	* Copyright 2011 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/
	#include "Forth.h"
	#include "SkString.h"

	class Reporter {
	public:
	int fFailureCount;

	Reporter() : fFailureCount(0) {}
	void reportFailure(const char expression[], const char file[], int line);
	void reportFailure(const char msg[]);
	};

	typedef void (ForthWordTestProc)(ForthWord, ForthEngine, Reporter);

	#define FORTH_ASSERT(reporter, expression) \
	do { \
	if (!(expression)) { \
	reporter->reportFailure(#expression, __FILE__, __LINE__); \
	} \
	} while (0)

	static void drop_test0(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(-17);
	word->exec(fe);
	FORTH_ASSERT(reporter, 0 == fe->depth());
	}

	static void drop_test1(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(-17);
	fe->push(93);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, -17 == fe->peek(0));
	}

	static void dup_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(-17);
	word->exec(fe);
	FORTH_ASSERT(reporter, 2 == fe->depth());
	FORTH_ASSERT(reporter, -17 == fe->peek(0));
	FORTH_ASSERT(reporter, -17 == fe->peek(1));
	}

	static void swap_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(-17);
	fe->push(42);
	word->exec(fe);
	FORTH_ASSERT(reporter, 2 == fe->depth());
	FORTH_ASSERT(reporter, -17 == fe->peek(0));
	FORTH_ASSERT(reporter, 42 == fe->peek(1));
	}

	static void over_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	word->exec(fe);
	FORTH_ASSERT(reporter, 3 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->peek(0));
	FORTH_ASSERT(reporter, 2 == fe->peek(1));
	FORTH_ASSERT(reporter, 1 == fe->peek(2));
	}

	static void rot_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	fe->push(3);
	word->exec(fe);
	FORTH_ASSERT(reporter, 3 == fe->depth());
	FORTH_ASSERT(reporter, 2 == fe->peek(2));
	FORTH_ASSERT(reporter, 3 == fe->peek(1));
	FORTH_ASSERT(reporter, 1 == fe->peek(0));
	}

	static void rrot_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	fe->push(3);
	word->exec(fe);
	FORTH_ASSERT(reporter, 3 == fe->depth());
	FORTH_ASSERT(reporter, 2 == fe->peek(0));
	FORTH_ASSERT(reporter, 1 == fe->peek(1));
	FORTH_ASSERT(reporter, 3 == fe->peek(2));
	}

	static void swap2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	fe->push(3);
	fe->push(4);
	word->exec(fe);
	FORTH_ASSERT(reporter, 4 == fe->depth());
	FORTH_ASSERT(reporter, 2 == fe->peek(0));
	FORTH_ASSERT(reporter, 1 == fe->peek(1));
	FORTH_ASSERT(reporter, 4 == fe->peek(2));
	FORTH_ASSERT(reporter, 3 == fe->peek(3));
	}

	static void dup2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	word->exec(fe);
	FORTH_ASSERT(reporter, 4 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->peek(3));
	FORTH_ASSERT(reporter, 2 == fe->peek(2));
	FORTH_ASSERT(reporter, 1 == fe->peek(1));
	FORTH_ASSERT(reporter, 2 == fe->peek(0));
	}

	static void over2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	fe->push(3);
	fe->push(4);
	word->exec(fe);
	FORTH_ASSERT(reporter, 6 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->peek(5));
	FORTH_ASSERT(reporter, 2 == fe->peek(4));
	FORTH_ASSERT(reporter, 3 == fe->peek(3));
	FORTH_ASSERT(reporter, 4 == fe->peek(2));
	FORTH_ASSERT(reporter, 1 == fe->peek(1));
	FORTH_ASSERT(reporter, 2 == fe->peek(0));
	}

	static void drop2_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	fe->push(3);
	fe->push(4);
	word->exec(fe);
	FORTH_ASSERT(reporter, 2 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->peek(1));
	FORTH_ASSERT(reporter, 2 == fe->peek(0));
	}

	//////////////////////////////////////////////////////////////////////////////

	static void iadd_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(35);
	fe->push(99);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 134 == fe->top());
	fe->push(-135);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, -1 == fe->top());
	}

	static void isub_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(35);
	fe->push(99);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 35-99 == fe->top());
	}

	static void imul_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(15);
	fe->push(-20);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, -300 == fe->top());
	fe->push(0);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 0 == fe->top());
	}

	static void idiv_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(100);
	fe->push(25);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 4 == fe->top());
	fe->setTop(10);
	fe->push(-3);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, -3 == fe->top());
	fe->setTop(-1);
	fe->push(-1);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->top());
	}

	static void imod_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(10);
	fe->push(3);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->top());
	fe->push(5);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->top());
	}

	static void idivmod_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(10);
	fe->push(3);
	word->exec(fe);
	FORTH_ASSERT(reporter, 2 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->peek(1));
	FORTH_ASSERT(reporter, 3 == fe->peek(0));
	}

	static void idot_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(1);
	fe->push(2);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 1 == fe->top());
	}

	static void iabs_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(10);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 10 == fe->top());
	fe->setTop(-10);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 10 == fe->top());
	}

	static void inegate_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(10);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, -10 == fe->top());
	fe->setTop(-10);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 10 == fe->top());
	}

	static void imin_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(10);
	fe->push(3);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 3 == fe->top());
	fe->push(-10);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, -10 == fe->top());
	}

	static void imax_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(10);
	fe->push(3);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 10 == fe->top());
	fe->push(-10);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 10 == fe->top());
	}

	///////////////////////////////////////////////////////////////////////////////

	static void logical_and_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	const static int data[] = {
	0, 0, 0,
	2, 0, 0,
	0, -1, 0,
	1, 5, -1
	};
	for (size_t i = 0; i < SK_ARRAY_COUNT(data)/3; i++) {
	fe->push(data[i*3 + 0]);
	fe->push(data[i*3 + 1]);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, data[i*3 + 2] == fe->top());
	fe->pop();
	}
	}

	static void logical_or_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	const static int data[] = {
	0, 0, 0,
	2, 0, -1,
	0, -1, -1,
	1, 5, -1
	};
	for (size_t i = 0; i < SK_ARRAY_COUNT(data)/3; i++) {
	fe->push(data[i*3 + 0]);
	fe->push(data[i*3 + 1]);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, data[i*3 + 2] == fe->top());
	fe->pop();
	}
	}

	static void logical_not_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	const static int data[] = {
	0, -1,
	5, 0,
	-1, 0
	};
	for (size_t i = 0; i < SK_ARRAY_COUNT(data)/2; i++) {
	fe->push(data[i*2 + 0]);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, data[i*2 + 1] == fe->top());
	fe->pop();
	}
	}

	static void if_dup_test(ForthWord* word, ForthEngine* fe, Reporter* reporter) {
	fe->push(10);
	word->exec(fe);
	FORTH_ASSERT(reporter, 2 == fe->depth());
	FORTH_ASSERT(reporter, 10 == fe->peek(1));
	FORTH_ASSERT(reporter, 10 == fe->peek(0));
	fe->pop();
	fe->pop();
	fe->push(0);
	word->exec(fe);
	FORTH_ASSERT(reporter, 1 == fe->depth());
	FORTH_ASSERT(reporter, 0 == fe->top());
	}

	static const struct {
	const char* fName;
	ForthWordTestProc fProc;
	} gRecs[] = {
	{ "DROP", drop_test0 }, { "DROP", drop_test1 },
	{ "DUP", dup_test },
	{ "SWAP", swap_test },
	{ "OVER", over_test },
	{ "ROT", rot_test },
	{ "-ROT", rrot_test },
	{ "2SWAP", swap2_test },
	{ "2DUP", dup2_test },
	{ "2OVER", over2_test },
	{ "2DROP", drop2_test },

	{ "+", iadd_test },
	{ "-", isub_test },
	{ "*", imul_test },
	{ "/", idiv_test },
	{ "MOD", imod_test },
	{ "/MOD", idivmod_test },

	// { ".", idot_test },
	{ "ABS", iabs_test },
	{ "NEGATE", inegate_test },
	{ "MIN", imin_test },
	{ "MAX", imax_test },

	{ "AND", logical_and_test },
	{ "OR", logical_or_test },
	{ "0=", logical_not_test },
	{ "?DUP", if_dup_test },
	};

	///////////////////////////////////////////////////////////////////////////////

	void Reporter::reportFailure(const char expression[], const char file[],
	int line) {
	SkDebugf("failed %s:%d: %s\n", file, line, expression);
	fFailureCount += 1;
	}

	void Reporter::reportFailure(const char msg[]) {
	SkDebugf("%s\n");
	fFailureCount += 1;
	}

	void Forth_test_stdwords(bool verbose);
	void Forth_test_stdwords(bool verbose) {
	ForthEnv env;
	Reporter reporter;

	for (size_t i = 0; i < SK_ARRAY_COUNT(gRecs); i++) {
	ForthEngine engine(NULL);

	ForthWord* word = env.findWord(gRecs[i].fName);
	if (NULL == word) {
	SkString str;
	str.printf("--- can't find stdword %d", gRecs[i].fName);
	reporter.reportFailure(str.c_str());
	} else {
	if (verbose) {
	SkDebugf("--- testing %s %p\n", gRecs[i].fName, word);
	}
	gRecs[i].fProc(word, &engine, &reporter);
	}
	}

	if (0 == reporter.fFailureCount) {
	SkDebugf("--- success!\n");
	} else {
	SkDebugf("--- %d failures\n", reporter.fFailureCount);
	}
	}