GraphicsMagick: PNMReadThreads(): Fix compiler warning regarding...

changeset 85068dab75e9 in /hg/GraphicsMagick
details: http://hg.GraphicsMagick.org/hg/GraphicsMagick?cmd=changeset;node=85068dab75e9
summary: PNMReadThreads(): Fix compiler warning regarding overflow

diffstat:

 ChangeLog          |  3 +++
 coders/pnm.c       |  6 +++---
 www/Changelog.html |  2 ++
 3 files changed, 8 insertions(+), 3 deletions(-)

diffs (43 lines):

diff -r f40fc1e9b251 -r 85068dab75e9 ChangeLog
--- a/ChangeLog	Fri Sep 15 09:59:28 2023 -0500
+++ b/ChangeLog	Fri Sep 15 10:23:27 2023 -0500
@@ -1,5 +1,8 @@
 2023-09-15  Bob Friesenhahn  <[email protected]>
 
+	* coders/pnm.c (PNMReadThreads): Fix compiler warning regarding
+	overflow.
+
 	* coders/sun.c (WriteSUNImage): Test for sun_info.length overflow
 	in a way which should not provoke a compiler warning.
 
diff -r f40fc1e9b251 -r 85068dab75e9 coders/pnm.c
--- a/coders/pnm.c	Fri Sep 15 09:59:28 2023 -0500
+++ b/coders/pnm.c	Fri Sep 15 10:23:27 2023 -0500
@@ -310,12 +310,12 @@
 static int PNMReadThreads(const Image* image, const size_t bytes_per_row)
 {
   const int omp_max_threads = omp_get_max_threads();
-  long threads;
+  int threads;
   ARG_NOT_USED(image);
-  threads=(Min(bytes_per_row/4096UL,(unsigned long) omp_max_threads));
+  threads=(int)(Min(bytes_per_row/4096U,(size_t) Max(0,omp_max_threads)));
   if (0 == threads)
     threads=1;
-  return (int) threads;
+  return threads;
 }
 #endif /* defined(HAVE_OPENMP) */
 
diff -r f40fc1e9b251 -r 85068dab75e9 www/Changelog.html
--- a/www/Changelog.html	Fri Sep 15 09:59:28 2023 -0500
+++ b/www/Changelog.html	Fri Sep 15 10:23:27 2023 -0500
@@ -40,6 +40,8 @@
 <p>2023-09-15  Bob Friesenhahn  &lt;<a class="reference external" href="mailto:bfriesen&#37;&#52;&#48;simple&#46;dallas&#46;tx&#46;us">bfriesen<span>&#64;</span>simple<span>&#46;</span>dallas<span>&#46;</span>tx<span>&#46;</span>us</a>&gt;</p>
 <blockquote>
 <ul class="simple">
+<li><p>coders/pnm.c (PNMReadThreads): Fix compiler warning regarding
+overflow.</p></li>
 <li><p>coders/sun.c (WriteSUNImage): Test for sun_info.length overflow
 in a way which should not provoke a compiler warning.</p></li>
 </ul>