Indent comments an extra space so the stars line up.

[bigint/bigint.git] / BigUnsignedInABase.cc

diff --git a/BigUnsignedInABase.cc b/BigUnsignedInABase.cc
index 8852575..c9b2906 100644 (file)
--- a/BigUnsignedInABase.cc
+++ b/BigUnsignedInABase.cc
@@ -1,19 +1,17 @@
 /*
-* Matt McCutchen's Big Integer Library
-* http://mysite.verizon.net/mccutchen/bigint/
-*/
+ * Matt McCutchen's Big Integer Library
+ */
 
 /*
-* Milan Tomic had trouble compiling this file on Microsoft
-* Visual C++ 6 because, in the libraries that come with
-* Visual C++ 6, the `std::string::push_back' method apparently
-* does not exist.  To get around the problem, I rewrote
-* `BigUnsignedInABase::operator std::string' (at the bottom
-* of this file) so it doesn't use `push_back'.
-*/
+ * Milan Tomic had trouble compiling this file on Microsoft
+ * Visual C++ 6 because, in the libraries that come with
+ * Visual C++ 6, the `std::string::push_back' method apparently
+ * does not exist.  To get around the problem, I rewrote
+ * `BigUnsignedInABase::operator std::string' (at the bottom
+ * of this file) so it doesn't use `push_back'.
+ */
 
 #include "BigUnsignedInABase.hh"
-#include <iostream>
 
 namespace {
        unsigned int bitLen(unsigned int x) {
@@ -28,9 +26,7 @@ namespace {
                return (a + b - 1) / b;
        }
 }
-       /*std::cout << "((( BigUnsigned ==> BigUnsignedInABase\n";
-       std::cout << "[ Parameter BigUnsigned @ " << (void *)(NumberlikeArray<BigUnsigned::Blk> *)(&x)
-               << ",\nresulting BigUnsignedInABase @ " << (void *)(NumberlikeArray<Digit> *)(this) << "]" << std::endl;*/
+
 BigUnsignedInABase::BigUnsignedInABase(const BigUnsigned &x, Base base) {
 
        // Check the base
@@ -39,17 +35,17 @@ BigUnsignedInABase::BigUnsignedInABase(const BigUnsigned &x, Base base) {
        // Save the base.
        // This pattern is seldom seen in C++, but the analogous ``this.'' is common in Java.
        this->base = base;
-       
+
        // Get an upper bound on how much space we need
-       int maxBitLenOfX = x.getLength() * 8 * sizeof(BigUnsigned::Blk);
+       int maxBitLenOfX = x.getLength() * BigUnsigned::N;
        int minBitsPerDigit = bitLen(base) - 1;
        int maxDigitLenOfX = ceilingDiv(maxBitLenOfX, minBitsPerDigit);
        len = maxDigitLenOfX; // Another change to comply with `staying in bounds'; see `BigUnsigned::divideWithRemainder'.
        allocate(len); // Get the space
-       
+
        BigUnsigned x2(x), buBase(base);
        Index digitNum = 0;
-       
+
        while (!x2.isZero()) {
                // Get last digit.  This is like `lastDigit = x2 % buBase, x2 /= buBase'.
                BigUnsigned lastDigit(x2);
@@ -59,10 +55,9 @@ BigUnsignedInABase::BigUnsignedInABase(const BigUnsigned &x, Base base) {
                // Move on.  We can't run out of room: we figured it out above.
                digitNum++;
        }
-       
+
        // Save the actual length.
        len = digitNum;
-       /*std::cout << "BigUnsigned ==> BigUnsignedInABase )))\n";*/
 }
 
 BigUnsignedInABase::operator BigUnsigned() const {
@@ -83,10 +78,12 @@ BigUnsignedInABase::BigUnsignedInABase(const std::string &s, Base base) {
        // Save the base.
        // This pattern is seldom seen in C++, but the analogous ``this.'' is common in Java.
        this->base = base;
-       
-       len = s.length();
+
+       // `s.length()' is a `size_t', while `len' is a `NumberlikeArray::Index',
+       // also known as an `unsigned int'.  Some compilers warn without this cast.
+       len = Index(s.length());
        allocate(len);
-       
+
        Index digitNum, symbolNumInString;
        for (digitNum = 0; digitNum < len; digitNum++) {
                symbolNumInString = len - 1 - digitNum;
@@ -104,7 +101,6 @@ BigUnsignedInABase::BigUnsignedInABase(const std::string &s, Base base) {
 }
 
 BigUnsignedInABase::operator std::string() const {
-       //std::cout << "((( BigUnsignedInABase ==> std::string\n";
        if (base > 36)
                throw "BigUnsignedInABase ==> std::string: The default string conversion routines use the symbol set 0-9, A-Z and therefore support only up to base 36.  You tried a conversion with a base over 36; write your own string conversion routine.";
        if (len == 0)
@@ -121,7 +117,7 @@ BigUnsignedInABase::operator std::string() const {
                        s[symbolNumInString] = char('A' + theDigit - 10);
        }
        std::string s2(s);
-       delete s;
-       //std::cout << "BigUnsignedInABase ==> std::string )))\n";
+       // 2006.05.03: This needs to be [] to match the allocation
+       delete [] s;
        return s2;
 }