vendor/bc/6.7.5

18 files changed, 1200 insertions, 22 deletions

diff --git a/NEWS.md b/NEWS.md
index 240e02f11388..32e74de31231 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,14 @@
 # News
 
+## 6.7.5
+
+This is a production release to fix one small bug.
+
+The bug is that sometimes numbers are printed to incorrect line lengths. The
+number is always correct; the line is just longer than the limit.
+
+Users who do not care do not need to update.
+
 ## 6.7.4
 
 This is a production release to fix problems in the `bc` manual.
diff --git a/include/bc.h b/include/bc.h
index 73a85aa406a0..17fd0b9d171f 100644
--- a/include/bc.h
+++ b/include/bc.h
@@ -276,7 +276,7 @@ bc_lex_token(BcLex* l);
  * @return   True if i is an expression token, false otherwise.
  */
 #define BC_PARSE_EXPR(i) \
-	(bc_parse_exprs[(((i) & (uchar) ~(0x07)) >> 3)] & (1 << (7 - ((i) &0x07))))
+	(bc_parse_exprs[(((i) & (uchar) ~(0x07)) >> 3)] & (1 << (7 - ((i) & 0x07))))
 
 /**
  * Returns the operator (by lex token) that is at the top of the operator
diff --git a/include/history.h b/include/history.h
index 19c5a0fe27f7..64402c4dffa1 100644
--- a/include/history.h
+++ b/include/history.h
@@ -173,10 +173,6 @@ typedef struct BcHistory
 #include <vector.h>
 #include <read.h>
 
-#if BC_DEBUG_CODE
-#include <file.h>
-#endif // BC_DEBUG_CODE
-
 /// Default columns.
 #define BC_HIST_DEF_COLS (80)
 
diff --git a/include/num.h b/include/num.h
index d24c206cbe51..6c9dee107f2f 100644
--- a/include/num.h
+++ b/include/num.h
@@ -211,9 +211,9 @@ struct BcRNG;
 #define BC_NUM_KARATSUBA_ALLOCS (6)
 
 /**
- * Rounds @a s (scale) up to the next power of BC_BASE_DIGS. This also check for
- * overflow and gives a fatal error if that happens because we just can't go
- * over the limits we have imposed.
+ * Rounds @a s (scale) up to the next power of BC_BASE_DIGS. This will also
+ * check for overflow and gives a fatal error if that happens because we just
+ * can't go over the limits we have imposed.
  * @param s  The scale to round up.
  * @return   @a s rounded up to the next power of BC_BASE_DIGS.
  */
diff --git a/include/version.h b/include/version.h
index d481cb10abf1..e2576269345d 100644
--- a/include/version.h
+++ b/include/version.h
@@ -37,6 +37,6 @@
 #define BC_VERSION_H
 
 /// The current version.
-#define VERSION 6.7.4
+#define VERSION 6.7.5
 
 #endif // BC_VERSION_H
diff --git a/scripts/sqrt_frac_guess.bc b/scripts/sqrt_frac_guess.bc
new file mode 100644
index 000000000000..5938cfcc7cba
--- /dev/null
+++ b/scripts/sqrt_frac_guess.bc
@@ -0,0 +1,126 @@
+#! /usr/bin/bc
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2018-2023 Gavin D. Howard and contributors.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+scale = 20
+
+# Adjust this number to try ranges below different powers of 10.
+shift = 4
+
+# Adjust this to try extra digits. For example, a value of one means that one
+# digit is checked (such as 0.09 through 0.01), a value of two means that two
+# digits are checked (0.090 through 0.010), etc.
+max = shift + 2
+
+n = (9 >> shift)
+inc = (1 >> max)
+stop = (1 >> shift)
+
+# Uncomment this to test the high part of the ranges.
+#n += (1 - (1 >> max + 5)) >> shift
+
+for (i = n; i >= stop; i -= inc)
+{
+	# This is the lower limit.
+	t1 = sqrt(1/(3*i))
+
+	# Start with the inverse.
+	t2 = (1/i)
+
+	# And take half its length of course.
+	l = length(t2$)/2
+
+	temp = i
+	odd = 0
+
+	# We go by powers of 10 below, but there is a degenerate case: an exact
+	# power of 10, for which length() will return one digit more. So we check
+	# for that and fix it.
+	while (temp < 1)
+	{
+		temp <<= 1
+		odd = !odd
+	}
+
+	if (temp == 1)
+	{
+		odd = !odd
+	}
+
+	print "i:  ", i, "\n"
+	print "t2: ", t2, "\n"
+	#print "l:  ", l, "\n"
+	print "odd: ", odd, "\n"
+
+	if (odd)
+	{
+		# Limit between 6 and 7.5.
+		limit1 = 6.7 >> (l$ * 2 + 1)
+
+		# Limit between 1.5 and 1.83-ish.
+		limit2 = 1.7 >> (l$ * 2 + 1)
+		print "limit1: ", limit1, "\n"
+		print "limit2: ", limit2, "\n"
+
+		if (i >= limit1)
+		{
+			t2 = (t2 >> l$)
+		}
+		else if (i >= limit2)
+		{
+			t2 = (t2 >> l$) / 2
+		}
+		else
+		{
+			t2 = (t2 >> l$) / 4
+		}
+	}
+	else
+	{
+		# Limit between 2.4 and 3.
+		limit = 2.7 >> (l$ * 2)
+		print "limit: ", limit, "\n"
+
+		if (i >= limit)
+		{
+			t2 = (t2 >> l$) * 2
+		}
+		else
+		{
+			t2 = (t2 >> l$)
+		}
+	}
+	#t2 = 1
+	t3 = sqrt(5/(3*i))
+	good = (t1 < t2 && t2 < t3)
+
+	print t1, " < ", t2, " < ", t3, ": ", good, "\n\n"
+	if (!good) sqrt(-1)
+}
+
+halt
diff --git a/scripts/sqrt_int_guess.bc b/scripts/sqrt_int_guess.bc
new file mode 100644
index 000000000000..551a06eb2e6d
--- /dev/null
+++ b/scripts/sqrt_int_guess.bc
@@ -0,0 +1,94 @@
+#! /usr/bin/bc -l
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2018-2023 Gavin D. Howard and contributors.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+# Adjust this number to try ranges above different powers of 10.
+max = 0
+
+n = (1 << max)
+
+# Uncomment this to test the high part of the ranges.
+#n += (1 - (1 >> 10))
+
+n
+
+# Loop from the start number to the next power of 10.
+for (i = n; i < (n$ << 1); i += 1)
+{
+	# This is the lower limit.
+	t1 = sqrt(1/(3*i))
+
+	l = length(i$)/2
+
+	print "i: ", i, "\n"
+	#print "l: ", l, "\n"
+
+	if (l$ != l)
+	{
+		# Limit between 2.4 and 3.
+		limit = 2.7 << (l$ * 2)
+		#print "limit: ", limit, "\n"
+
+		if (i >= limit)
+		{
+			t2 = 1/(i >> (l$)) * 2
+		}
+		else
+		{
+			t2 = 1/(i >> (l$))
+		}
+	}
+	else
+	{
+		# Limit between 3.8-ish and 4.8
+		limit = 4.3 << (l$ * 2 - 1)
+		#print "limit: ", limit, "\n"
+
+		if (i >= limit)
+		{
+			t2 = 1/(i >> (l$ - 1)) * 8
+		}
+		else
+		{
+			t2 = 1/(i >> (l$ - 1)) * 4
+		}
+	}
+
+	# This is the upper limit.
+	t3 = sqrt(5/(3*i))
+
+	# This is true when the guess is in between the limits.
+	good = (t1 < t2 && t2 < t3)
+
+	print t1, " < ", t2, " < ", t3, ": ", good, "\n"
+
+	# Error if we have a problem.
+	if (!good) sqrt(-1)
+}
+
+halt
diff --git a/scripts/sqrt_random.bc b/scripts/sqrt_random.bc
new file mode 100644
index 000000000000..ff08348f4977
--- /dev/null
+++ b/scripts/sqrt_random.bc
@@ -0,0 +1,129 @@
+#! /usr/bin/bc
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2018-2023 Gavin D. Howard and contributors.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+scale = 0
+
+bits = rand()
+
+# This extracts a bit and takes it out of the original value.
+#
+# Here, I am getting a bit to say whether we should have a value that is less
+# than 1.
+bits = divmod(bits, 2, negpow[])
+
+# Get a bit that will say whether the value should be an exact square.
+bits = divmod(bits, 2, square[])
+
+# See below. This is to help bias toward small numbers.
+pow = 4
+
+# I want to bias toward small numbers, so let's give a 50 percent chance to
+# values below 16 or so.
+bits = divmod(bits, 2, small[])
+
+# Let's keep raising the power limit by 2^4 when the bit is zero.
+while (!small[0])
+{
+	pow += 4
+	bits = divmod(bits, 2, small[])
+}
+
+limit = 2^pow
+
+# Okay, this is the starting number.
+num = irand(limit) + 1
+
+# Figure out if we should have (more) fractional digits.
+bits = divmod(bits, 2, extra_digits[])
+
+if (square[0])
+{
+	# Okay, I lied. If we need a perfect square, square now.
+	num *= num
+
+	# If we need extra digits, we need to multiply by an even power of 10.
+	if (extra_digits[0])
+	{
+		extra = (irand(8) + 1) * 2
+	}
+	else
+	{
+		extra = 0
+	}
+
+	# If we need a number less than 1, just take the inverse, which will still
+	# be a perfect square.
+	if (negpow[0])
+	{
+		scale = length(num) + 5
+		num = 1/num
+		scale = 0
+
+		num >>= extra
+	}
+	else
+	{
+		num <<= extra
+	}
+}
+else
+{
+	# Get this for later.
+	l = length(num)
+
+	# If we need extra digits.
+	if (extra_digits[0])
+	{
+		# Add up to 32 decimal places.
+		num += frand(irand(32) + 1)
+	}
+
+	# If we need a value less than 1...
+	if (negpow[0])
+	{
+		# Move right until the number is
+		num >>= l
+	}
+}
+
+bits = divmod(bits, 2, zero_scale[])
+
+# Do we want a zero scale?
+if (zero_scale[0])
+{
+	print "scale = 0\n"
+}
+else
+{
+	print "scale = 20\n"
+}
+
+print "sqrt(", num, ")\n"
+
+halt
diff --git a/scripts/sqrt_random.sh b/scripts/sqrt_random.sh
new file mode 100755
index 000000000000..694c72003192
--- /dev/null
+++ b/scripts/sqrt_random.sh
@@ -0,0 +1,77 @@
+#! /bin/sh
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2018-2023 Gavin D. Howard and contributors.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+scriptdir=$(dirname "$0")
+
+gnu=/usr/bin/bc
+gdh=/usr/local/bin/bc
+
+if [ "$#" -lt 1 ]; then
+	printf 'err: must provide path to new bc\n'
+	exit 1
+fi
+
+new="$1"
+shift
+
+unset BC_LINE_LENGTH && unset BC_ENV_ARGS
+
+gdh_fail_file="sqrt_fails.bc"
+new_fail_file="new_sqrt_fails.bc"
+
+rm -rf "$gdh_fail_file"
+rm -rf "$new_fail_file"
+
+while [ true ]; do
+
+	tst=$("$gdh" -l "$scriptdir/sqrt_random.bc")
+	err=$?
+
+	if [ "$err" -ne 0 ]; then
+		printf 'err: failed to create test\n'
+		exit 2
+	fi
+
+	good=$(printf '%s\n' "$tst" | "$gnu" -l)
+
+	gdh_out=$(printf '%s\n' "$tst" | "$gdh" -l)
+	new_out=$(printf '%s\n' "$tst" | "$new" -l)
+
+	gdh_good=$(printf '%s == %s\n' "$good" "$gdh_out" | "$gnu")
+	new_good=$(printf '%s == %s\n' "$good" "$new_out" | "$gnu")
+
+	if [ "$gdh_good" -eq 0 ]; then
+		printf '%s\n' "$tst" >> "$gdh_fail_file"
+	fi
+
+	if [ "$new_good" -eq 0 ]; then
+		printf '%s\n' "$tst" >> "$new_fail_file"
+	fi
+
+done
diff --git a/src/num.c b/src/num.c
index e45aa62ddd0f..ac0f828008f8 100644
--- a/src/num.c
+++ b/src/num.c
@@ -3207,12 +3207,30 @@ bc_num_printNum(BcNum* restrict n, BcBigDig base, size_t len,
 		assert(ptr != NULL);
 
 		// While the first three arguments should be self-explanatory, the last
-		// needs explaining. I don't want to print a newline when the last digit
-		// to be printed could take the place of the backslash rather than being
-		// pushed, as a single character, to the next line. That's what that
-		// last argument does for bc.
+		// needs explaining. I don't want to print a backslash+newline when the
+		// last digit to be printed could take the place of the backslash rather
+		// than being pushed, as a single character, to the next line. That's
+		// what that last argument does for bc.
+		//
+		// First, it needs to check if newlines are completely disabled. If they
+		// are not disabled, it needs to check the next part.
+		//
+		// If the number has a scale, then because we are printing just the
+		// integer part, there will be at least two more characters (a radix
+		// point plus at least one digit). So if there is a scale, a backslash
+		// is necessary.
+		//
+		// Finally, the last condition checks to see if we are at the end of the
+		// stack. If we are *not* (i.e., the index is not one less than the
+		// stack length), then a backslash is necessary because there is at
+		// least one more character for at least one more digit). Otherwise, if
+		// the index is equal to one less than the stack length, we want to
+		// disable backslash printing.
+		//
+		// The function that prints bases 17 and above will take care of not
+		// printing a backslash in the right case.
 		print(*ptr, len, false,
-		      !newline || (n->scale != 0 || i == stack.len - 1));
+		      !newline || (n->scale != 0 || i < stack.len - 1));
 	}
 
 	// We are done if there is no fractional part.
@@ -4091,13 +4109,14 @@ bc_num_sqrt(BcNum* restrict a, BcNum* restrict b, size_t scale)
 
 	// Square root needs half of the length of the parameter.
 	req = bc_vm_growSize(BC_MAX(rdx, BC_NUM_RDX_VAL(a)), len >> 1);
+	req = bc_vm_growSize(req, 1);
 
 	BC_SIG_LOCK;
 
 	// Unlike the binary operators, this function is the only single parameter
 	// function and is expected to initialize the result. This means that it
 	// expects that b is *NOT* preallocated. We allocate it here.
-	bc_num_init(b, bc_vm_growSize(req, 1));
+	bc_num_init(b, req);
 
 	BC_SIG_UNLOCK;
 
@@ -4130,13 +4149,12 @@ bc_num_sqrt(BcNum* restrict a, BcNum* restrict b, size_t scale)
 	bc_num_init(&num2, len);
 	bc_num_setup(&half, half_digs, sizeof(half_digs) / sizeof(BcDig));
 
-	// There is a division by two in the formula. We setup a number that's 1/2
+	// There is a division by two in the formula. We set up a number that's 1/2
 	// so that we can use multiplication instead of heavy division.
-	bc_num_one(&half);
+	bc_num_setToZero(&half, 1);
 	half.num[0] = BC_BASE_POW / 2;
 	half.len = 1;
 	BC_NUM_RDX_SET_NP(half, 1);
-	half.scale = 1;
 
 	bc_num_init(&f, len);
 	bc_num_init(&fprime, len);
@@ -4156,8 +4174,9 @@ bc_num_sqrt(BcNum* restrict a, BcNum* restrict b, size_t scale)
 	pow = bc_num_intDigits(a);
 
 	// The code in this if statement calculates the initial estimate. First, if
-	// a is less than 0, then 0 is a good estimate. Otherwise, we want something
-	// in the same ballpark. That ballpark is pow.
+	// a is less than 1, then 0 is a good estimate. Otherwise, we want something
+	// in the same ballpark. That ballpark is half of pow because the result
+	// will have half the digits.
 	if (pow)
 	{
 		// An odd number is served by starting with 2^((pow-1)/2), and an even
diff --git a/src/program.c b/src/program.c
index 2f26589166e3..c9d268dfde82 100644
--- a/src/program.c
+++ b/src/program.c
@@ -3780,7 +3780,7 @@ bc_program_printStr(const BcProgram* p, const char* restrict code,
 	size_t idx = bc_program_index(code, bgn);
 	char* s;
 
-	s = *((char**) bc_vec_item(p->strs, idx));
+	s = *((char**) bc_vec_item(&p->strs, idx));
 
 	bc_vm_printf(" (\"%s\") ", s);
 }
@@ -3803,7 +3803,7 @@ bc_program_printInst(const BcProgram* p, const char* restrict code,
 	else if (inst == BC_INST_NUM)
 	{
 		size_t idx = bc_program_index(code, bgn);
-		BcConst* c = bc_vec_item(p->consts, idx);
+		BcConst* c = bc_vec_item(&p->consts, idx);
 		bc_vm_printf("(%s)", c->val);
 	}
 	else if (inst == BC_INST_CALL ||
diff --git a/tests/bc/scripts/all.txt b/tests/bc/scripts/all.txt
index 0008d70193c6..7b49f7c4e77a 100644
--- a/tests/bc/scripts/all.txt
+++ b/tests/bc/scripts/all.txt
@@ -3,6 +3,7 @@ divide.bc
 subtract.bc
 add.bc
 print.bc
+print2.bc
 parse.bc
 root.bc
 array.bc
diff --git a/tests/bc/scripts/print2.bc b/tests/bc/scripts/print2.bc
new file mode 100644
index 000000000000..5f3466929f77
--- /dev/null
+++ b/tests/bc/scripts/print2.bc
@@ -0,0 +1,63 @@
+#! /usr/bin/bc -q
+
+l = line_length()
+
+max = 128
+scale = 0
+
+obase=2
+2^99
+2^100
+2^105
+
+for (i = 2; i < max; ++i)
+{
+	obase=i
+	if (obase < 17)
+	{
+		1 * i^(l - 1)
+		1 * i^l
+		1 * i^(l + 1)
+	}
+	else if (obase >= 17 && obase <= 100)
+	{
+		l2 = l/3
+		1 * i^(l2 - 1)
+		1 * i^l2
+		1 * i^(l2 + 1)
+	}
+	else
+	{
+		l2 = l/4
+		1 * i^(l2 - 1)
+		1 * i^l2
+		1 * i^(l2 + 1)
+	}
+}
+
+if (maxobase() > 2^18)
+{
+	obase=2^18
+	1 * i^(100)
+	1 * i^(101)
+	1 * i^(103)
+}
+else
+{
+	print " 065536 000000 000000 000000 000000 000000 000000 000000 000000 0000\\\n"
+	print "00 000000 000000 000000 000000 000000 000000 000000 000000 000000 00\\\n"
+	print "0000 000000 000000 000000 000000 000000 000000 000000 000000 000000 \\\n"
+	print "000000 000000 000000 000000 000000 000000 000000 000000 000000 000000\n"
+	print " 000032 000000 000000 000000 000000 000000 000000 000000 000000 0000\\\n"
+	print "00 000000 000000 000000 000000 000000 000000 000000 000000 000000 00\\\n"
+	print "0000 000000 000000 000000 000000 000000 000000 000000 000000 000000 \\\n"
+	print "000000 000000 000000 000000 000000 000000 000000 000000 000000 00000\\\n"
+	print "0 000000\n"
+	print " 000002 000000 000000 000000 000000 000000 000000 000000 000000 0000\\\n"
+	print "00 000000 000000 000000 000000 000000 000000 000000 000000 000000 00\\\n"
+	print "0000 000000 000000 000000 000000 000000 000000 000000 000000 000000 \\\n"
+	print "000000 000000 000000 000000 000000 000000 000000 000000 000000 00000\\\n"
+	print "0 000000 000000\n"
+}
+
+halt
diff --git a/tests/bc/scripts/print2.txt b/tests/bc/scripts/print2.txt
new file mode 100644
index 000000000000..208f0ed2e479
--- /dev/null
+++ b/tests/bc/scripts/print2.txt
@@ -0,0 +1,650 @@
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diff --git a/tests/bc/sqrt.txt b/tests/bc/sqrt.txt
index afd87ff0f6e6..f0d79a188290 100644
--- a/tests/bc/sqrt.txt
+++ b/tests/bc/sqrt.txt
@@ -1,5 +1,7 @@
 scale = 20
 sqrt(0)
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 sqrt(2)
 sqrt(4)
 sqrt(9)
diff --git a/tests/bc/sqrt_results.txt b/tests/bc/sqrt_results.txt
index 10a4fa95d5a5..8ce821f1fb49 100644
--- a/tests/bc/sqrt_results.txt
+++ b/tests/bc/sqrt_results.txt
@@ -1,4 +1,6 @@
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diff --git a/vs/bc.vcxproj b/vs/bc.vcxproj
index 312af50e8a66..377eb8645a71 100644
--- a/vs/bc.vcxproj
+++ b/vs/bc.vcxproj
@@ -100,6 +100,7 @@
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@@ -119,6 +120,7 @@
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diff --git a/vs/bcl.vcxproj b/vs/bcl.vcxproj
index a8de10e9f10b..f838cac7cbd1 100644
--- a/vs/bcl.vcxproj
+++ b/vs/bcl.vcxproj
@@ -130,6 +130,7 @@
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+      <AdditionalOptions>/std:c17 /MP $(AdditionalOptions)</AdditionalOptions>
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       <PreprocessorDefinitions>BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=1;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
@@ -143,6 +144,7 @@
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+      <AdditionalOptions>/std:c17 /MP $(AdditionalOptions)</AdditionalOptions>
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@@ -160,6 +162,7 @@
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+      <AdditionalOptions>/std:c17 /MP $(AdditionalOptions)</AdditionalOptions>
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@@ -178,6 +181,7 @@
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+      <AdditionalOptions>/std:c17 /MP $(AdditionalOptions)</AdditionalOptions>
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@@ -191,6 +195,7 @@
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@@ -208,6 +213,7 @@
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       <IntrinsicFunctions>true</IntrinsicFunctions>