X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=check%2Fexam_numeric.cpp;h=90e435e8f53f03243ee9723325f848f269012b64;hp=8d77a5b4506195d41ae946a09a4cc30bd93b8bb1;hb=c8feefe95a6c219195aea22050f17e2294656f32;hpb=e7cc6a764ff67b5885d6633385fac23ccc1dc9a7;ds=sidebyside

diff --git a/check/exam_numeric.cpp b/check/exam_numeric.cpp
index 8d77a5b4..90e435e8 100644
--- a/check/exam_numeric.cpp
+++ b/check/exam_numeric.cpp
@@ -4,7 +4,7 @@
  *  tests on these numbers like is_integer() etc... */
 
 /*
- *  GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -23,9 +23,11 @@
 
 #include "exams.h"
 
+#include <sstream>
+
 /* Simple and maybe somewhat pointless consistency tests of assorted tests and
  * conversions. */
-static unsigned exam_numeric1(void)
+static unsigned exam_numeric1()
 {
 	unsigned result = 0;
 	numeric test_int1(42);
@@ -110,7 +112,7 @@ static unsigned exam_numeric1(void)
  * Implementing a workaround sadly introduced another bug on May 28th 1999
  * that was fixed on May 31st.  The workaround turned out to be stupid and
  * the original bug in CLN was finally killed on September 2nd. */
-static unsigned exam_numeric2(void)
+static unsigned exam_numeric2()
 {
 	unsigned result = 0;
 	
@@ -149,7 +151,7 @@ static unsigned exam_numeric2(void)
 
 /* Assorted tests to ensure some crucial functions behave exactly as specified
  * in the documentation. */
-static unsigned exam_numeric3(void)
+static unsigned exam_numeric3()
 {
 	unsigned result = 0;
 	numeric calc_rem, calc_quo;
@@ -267,7 +269,7 @@ static unsigned exam_numeric3(void)
 
 /* Now we perform some less trivial checks about several functions which should
  * return exact numbers if possible. */
-static unsigned exam_numeric4(void)
+static unsigned exam_numeric4()
 {
 	unsigned result = 0;
 	bool passed;
@@ -298,7 +300,7 @@ static unsigned exam_numeric4(void)
 
 /* This test examines that simplifications of the form 5^(3/2) -> 5*5^(1/2)
  * are carried out properly. */
-static unsigned exam_numeric5(void)
+static unsigned exam_numeric5()
 {
 	unsigned result = 0;
 	
@@ -315,7 +317,63 @@ static unsigned exam_numeric5(void)
 	return result;
 }
 
-unsigned exam_numeric(void)
+/* This test checks whether the numeric output/parsing routines are
+   consistent. */
+static unsigned exam_numeric6()
+{
+	unsigned result = 0;
+
+	symbol sym("sym");
+	vector<ex> test_numbers;
+	test_numbers.push_back(numeric(0));			// zero
+	test_numbers.push_back(numeric(1));			// one
+	test_numbers.push_back(numeric(-1));		// minus one
+	test_numbers.push_back(numeric(42));		// positive integer
+	test_numbers.push_back(numeric(-42));		// negative integer
+	test_numbers.push_back(numeric(14,3));		// positive rational
+	test_numbers.push_back(numeric(-14,3));		// negative rational
+	test_numbers.push_back(numeric(3.141));		// positive decimal
+	test_numbers.push_back(numeric(-3.141));	// negative decimal
+	test_numbers.push_back(numeric(0.1974));	// positive decimal, leading zero
+	test_numbers.push_back(numeric(-0.1974));	// negative decimal, leading zero
+	test_numbers.push_back(sym);				// symbol
+
+	for (vector<ex>::const_iterator br=test_numbers.begin(); br<test_numbers.end(); ++br) {
+		for (vector<ex>::const_iterator bi=test_numbers.begin(); bi<test_numbers.end(); ++bi) {
+
+			for (vector<ex>::const_iterator er=test_numbers.begin(); er<test_numbers.end(); ++er) {
+				for (vector<ex>::const_iterator ei=test_numbers.begin(); ei<test_numbers.end(); ++ei) {
+
+					// Construct expression, don't test invalid ones
+					ex base = (*br) + (*bi)*I, exponent = (*er) + (*ei)*I, x;
+					try {
+						x = pow(base, exponent);
+					} catch (...) {
+						continue;
+					}
+
+					// Print to string
+					std::ostringstream s;
+					s << x;
+
+					// Read back expression from string
+					string x_as_string = s.str();
+					ex x_again(x_as_string, lst(sym));
+
+					// They should be equal
+					if (!x_again.is_equal(x)) {
+						clog << x << " was read back as " << x_again << endl;
+						++result;
+					}
+				}
+			}
+		}
+	}
+
+	return result;
+}
+
+unsigned exam_numeric()
 {
 	unsigned result = 0;
 	
@@ -327,6 +385,7 @@ unsigned exam_numeric(void)
 	result += exam_numeric3();  cout << '.' << flush;
 	result += exam_numeric4();  cout << '.' << flush;
 	result += exam_numeric5();  cout << '.' << flush;
+	result += exam_numeric6();  cout << '.' << flush;
 	
 	if (!result) {
 		cout << " passed " << endl;