[hackers] [sbase] dc: Don't use truncate() || Roberto E. Vargas Caballero

From: <git_AT_suckless.org>
Date: Wed, 14 Jan 2026 21:31:42 +0100 (CET)

commit 860737f897218ffe123c4749ca9cf8998eecf17d
Author: Roberto E. Vargas Caballero <k0ga_AT_shike2.net>
AuthorDate: Wed Jan 14 21:30:02 2026 +0100
Commit: Roberto E. Vargas Caballero <k0ga_AT_shike2.net>
CommitDate: Wed Jan 14 21:30:02 2026 +0100

    dc: Don't use truncate()
    
    Truncate() is a function since POSIX 2008, and even it should
    be exposed only if unistd.h is included, OpenBSD exposes it
    even when we are using only c90 headers. Renamed to numtrunc()
    to avoid the name collision.

diff --git a/dc.c b/dc.c
index 13f988b..092afc0 100644
--- a/dc.c
+++ b/dc.c
_AT_@ -287,7 +287,7 @@ next(Num *num)
 }
 
 static void
-truncate(Num *num)
+numtrunc(Num *num)
 {
         num->wp = num->rp;
         if (num->rp != num->buf)
_AT_@ -326,13 +326,13 @@ rshift(Num *num, int n)
         diff = length(num) - n;
         if (diff < 0) {
                 first(num);
- truncate(num);
+ numtrunc(num);
                 return;
         }
 
         memmove(num->buf, num->buf + n, diff);
         num->rp = num->buf + diff;
- truncate(num);
+ numtrunc(num);
 }
 
 static void
_AT_@ -373,7 +373,7 @@ chsign(Num *num)
                         wrdigit(num, -1);
         } else {
                 if (peek(num) == 0)
- truncate(num);
+ numtrunc(num);
         }
 
         return num;
_AT_@ -404,14 +404,14 @@ static Num *
 norm(Num *n)
 {
         /* trailing 0 */
- for (last(n); peek(n) == 0; truncate(n))
+ for (last(n); peek(n) == 0; numtrunc(n))
                 ;
 
         if (negative(n)) {
                 for (prev(n); peek(n) == 99; prev(n)) {
                         poke(n, -1);
                         next(n);
- truncate(n);
+ numtrunc(n);
                 }
         }
 
_AT_@ -428,7 +428,7 @@ mulnto(Num *src, Num *dst, int n)
         int d, carry;
 
         first(dst);
- truncate(dst);
+ numtrunc(dst);
 
         carry = 0;
         for (first(src); more(src); next(src)) {
_AT_@ -999,7 +999,7 @@ isqrt(int n)
  * To compute sqrt with scale decimal places of precision:
  * 1. Scale up y by 10^(2*scale + 2) (extra 2 for guard digits)
  * 2. Compute integer sqrt
- * 3. Result has (scale + 1) decimal places, truncate to scale
+ * 3. Result has (scale + 1) decimal places, numtrunc to scale
  */
 static Num *
 sqrtnum(Num *oy)
Received on Wed Jan 14 2026 - 21:31:42 CET