Modify big integer library

third_party/bigint/BigUnsignedInABase.cc

+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code by Matt McCutchen, see the LICENSE file
+
 #include "BigUnsignedInABase.hh"
 
 BigUnsignedInABase::BigUnsignedInABase(const Digit *d, Index l, Base base)
         : NumberlikeArray<Digit>(d, l), base(base) {
         // Check the base
         if (base < 2)
+#ifdef FOXIT_CHROME_BUILD
+        abort();
+#else
                 throw "BigUnsignedInABase::BigUnsignedInABase(const Digit *, Index, Base): The base must be at least 2";
+#endif
 
         // Validate the digits.
         for (Index i = 0; i < l; i++)
                 if (blk[i] >= base)
+#ifdef FOXIT_CHROME_BUILD
+            abort();
+#else
                         throw "BigUnsignedInABase::BigUnsignedInABase(const Digit *, Index, Base): A digit is too large for the specified base";
+#endif
 
         // Eliminate any leading zeros we may have been passed.
         zapLeadingZeros();
 }
 
 namespace {
         unsigned int bitLen(unsigned int x) {
                 unsigned int len = 0;
                 while (x > 0) {
                         x >>= 1;
                         len++;
                 }
                 return len;
         }
         unsigned int ceilingDiv(unsigned int a, unsigned int b) {
                 return (a + b - 1) / b;
         }
 }
 
 BigUnsignedInABase::BigUnsignedInABase(const BigUnsigned &x, Base base) {
         // Check the base
         if (base < 2)
+#ifdef FOXIT_CHROME_BUILD
+        abort();
+#else
                 throw "BigUnsignedInABase(BigUnsigned, Base): The base must be at least 2";
+#endif
         this->base = base;
 
         // Get an upper bound on how much space we need
         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'.
         allocate(len); // Get the space
 
         BigUnsigned x2(x), buBase(base);
@@ skipping 20 matching lines @@
                 digitNum--;
                 temp.multiply(ans, buBase);
                 ans.add(temp, BigUnsigned(blk[digitNum]));
         }
         return ans;
 }
 
 BigUnsignedInABase::BigUnsignedInABase(const std::string &s, Base base) {
         // Check the base.
         if (base > 36)
+#ifdef FOXIT_CHROME_BUILD
+        abort();
+#else
                 throw "BigUnsignedInABase(std::string, Base): 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.";
+#endif
         // Save the base.
         // This pattern is seldom seen in C++, but the analogous ``this.'' is common in Java.
         this->base = base;
 
         // `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;
                 char theSymbol = s[symbolNumInString];
                 if (theSymbol >= '0' && theSymbol <= '9')
                         blk[digitNum] = theSymbol - '0';
                 else if (theSymbol >= 'A' && theSymbol <= 'Z')
                         blk[digitNum] = theSymbol - 'A' + 10;
                 else if (theSymbol >= 'a' && theSymbol <= 'z')
                         blk[digitNum] = theSymbol - 'a' + 10;
                 else
+#ifdef FOXIT_CHROME_BUILD
+            abort();
+#else
                         throw "BigUnsignedInABase(std::string, Base): Bad symbol in input.  Only 0-9, A-Z, a-z are accepted.";
+#endif
 
                 if (blk[digitNum] >= base)
+#ifdef FOXIT_CHROME_BUILD
+            abort();
+#else
                         throw "BigUnsignedInABase::BigUnsignedInABase(const Digit *, Index, Base): A digit is too large for the specified base";
+#endif
         }
         zapLeadingZeros();
 }
 
 BigUnsignedInABase::operator std::string() const {
         if (base > 36)
+#ifdef FOXIT_CHROME_BUILD
+        abort();
+#else
                 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.";
+#endif
         if (len == 0)
                 return std::string("0");
         // Some compilers don't have push_back, so use a char * buffer instead.
         char *s = new char[len + 1];
         s[len] = '\0';
         Index digitNum, symbolNumInString;
         for (symbolNumInString = 0; symbolNumInString < len; symbolNumInString++) {
                 digitNum = len - 1 - symbolNumInString;
                 Digit theDigit = blk[digitNum];
                 if (theDigit < 10)
                         s[symbolNumInString] = char('0' + theDigit);
                 else
                         s[symbolNumInString] = char('A' + theDigit - 10);
         }
         std::string s2(s);
         delete [] s;
         return s2;
 }