Modify big integer library

This patch follows https://pdfium.googlesource.com/pdfium/+/44047c3300d07192a67b1714084cc2d43b1e9bd9

Modify the library to resolve compile error,
add copyright notice and change pdfium.gyp and BUILD.gn

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/754743003

1 files changed, 34 insertions, 0 deletions

diff --git a/third_party/bigint/BigUnsignedInABase.cc b/third_party/bigint/BigUnsignedInABase.cc
index 999faaf2db..a24042d538 100644
--- a/third_party/bigint/BigUnsignedInABase.cc
+++ b/third_party/bigint/BigUnsignedInABase.cc
@@ -1,15 +1,29 @@
+// 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();
@@ -32,7 +46,11 @@ namespace {
 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
@@ -73,7 +91,11 @@ BigUnsignedInABase::operator BigUnsigned() const {
 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;
@@ -94,17 +116,29 @@ BigUnsignedInABase::BigUnsignedInABase(const std::string &s, Base base) {
 		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.