From 427349ba1556a2efb131ee05f4f3752e35d06957 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Mon, 28 Mar 2022 15:46:27 -0400
Subject: move big.c internal constants to big.c

---
 big.c | 17 ++++++++++++-----
 big.h | 22 ++++++----------------
 2 files changed, 18 insertions(+), 21 deletions(-)

diff --git a/big.c b/big.c
index 71fe9c1..a30f890 100644
--- a/big.c
+++ b/big.c
@@ -17,6 +17,13 @@
 #define MAX_INT_BITS		60
 #define LONG_LONG_OVERFLOW	(1ll<<MAX_INT_BITS)
 
+#define PTEN 10000      /* largest power of ten < IBASE (used by bigscan) */
+#define PSIXTEEN 4096   /* largest power of sixteen <= IBASE (used by bigtostr) */
+#define PEIGHT 0100000  /* (=32768) largest power of eight <= IBASE (used by bigtostr) */
+#define TENW 4          /* number of factors of 10 in PTEN */
+#define OCTW 5          /* number of factors of 8 in IBASE */
+#define DIGITWIDTH 15
+
 word big_one;
 
 static word big_plus(word, word, int);
@@ -116,7 +123,7 @@ word bigplus(word x, word y)
 word big_plus(word x, word y, int signbit)
 {
   word d = digit0(x) + digit0(y);
-  word r = make(INT, signbit | d & MAXDIGIT, 0);	/* result */
+  word r = make(INT, signbit | (d & MAXDIGIT), 0);	/* result */
   word *z = &rest(r);		/* pointer to rest of result */
 
   word carry = ((d & IBASE) != 0);
@@ -338,7 +345,7 @@ word stimes(word x, word n)
   word r = make(INT, d & MAXDIGIT, 0);
   word *y = &rest(r);
 
-  while (x = rest(x)) {
+  while ((x = rest(x)) != 0) {
     d = n * digit(x) + carry;
     *y = make(INT, d & MAXDIGIT, 0);
     y = &rest(*y);
@@ -443,7 +450,7 @@ word shortdiv(word x, word n)
   word q = 0;
 
   /* reverse rest(x) into q */
-  while (x = rest(x)) {
+  while ((x = rest(x)) != 0) {
     q = make(INT, d, q);
     d = digit(x);	/* leaving most sig. digit in d */
   }
@@ -551,7 +558,7 @@ word longdiv(word x, word y)
 word len(word x)
 {
   word n = 1;
-  while (x = rest(x)) {
+  while ((x = rest(x)) != 0) {
     n++;
   }
 
@@ -917,7 +924,7 @@ word bigtostr(word x)
   sign = big_is_negative(x);
 
   x1 = make(INT, digit0(x), 0);	/* reverse x into x1 */
-  while (x = rest(x)) {
+  while ((x = rest(x)) != 0) {
     x1 = make(INT, digit(x), x1);
   }
   x = x1;
diff --git a/big.h b/big.h
index 36d1ba2..d291512 100644
--- a/big.h
+++ b/big.h
@@ -8,12 +8,11 @@
  * Revised to C11 standard and made 64bit compatible, January 2020        *
  *------------------------------------------------------------------------*/
 
-#define SIGNBIT 020000000000
-   /* most significant bit of 32 bit word */
-#define IBASE 0100000
-   /* 2^15 (ie 8^5) so digit is a positive short */
+#define SIGNBIT 020000000000	/* most significant bit of 32 bit word */
+#define IBASE 0100000		/* 2^15 (ie 8^5) so digit is a positive short */
 #define MAXDIGIT 077777
 #define DIGITWIDTH 15
+
 #define digit0(x) (hd[x]&MAXDIGIT)
 #define digit(x) hd[x]
 #define rest(x) tl[x]
@@ -22,10 +21,10 @@
 #define bigzero(x) (!digit(x)&&!rest(x))
 #define getsmallint(x) (hd[x]&SIGNBIT?-digit0(x):digit(x))
 #define stosmallint(x) make(INT,(x)<0?SIGNBIT|(-(x)):(x),0)
+
 long long get_int(word);
 word sto_int(long long);
 double bigtodbl(word);
-long double bigtoldbl(word); /* not currently used */
 double biglog(word);
 double biglog10(word);
 int bigcmp(word,word);
@@ -46,17 +45,8 @@ word bigxscan(char *,char *);
 word dbltobig(double);
 int isnat(word);
 word strtobig(word,int);
-#define force_dbl(x) (tag[x]==INT?bigtodbl(x):get_dbl(x))
-#define PTEN 10000
-   /* largest power of ten < IBASE (used by bigscan) */
-#define PSIXTEEN 4096
-   /* largest power of sixteen <= IBASE (used by bigtostr) */
-#define PEIGHT 0100000
-   /* (=32768) largest power of eight <= IBASE (used by bigtostr) */
-#define TENW 4
-   /* number of factors of 10 in PTEN */
-#define OCTW 5
-   /* number of factors of 8 in IBASE */
+
+#define force_dbl(x) ((tag[(x)] == INT) ? bigtodbl((x)) : get_dbl((x)))
 
 /* END OF DEFINITIONS FOR INTEGER PACKAGE */
 
-- 
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