Added the --out-dir option to the build script.

Made a few code changes in an attempt to eliminate some compiler warnings
in the case of MSVC on Windows.

build/build

@@ -109,6 +109,7 @@ use_pthread=0
 enable_multithread=1
 build_dir=
 install_dir=
+out_dir=
 crostini=0
 clean_build_dir=0
 clean_install_dir=0
@@ -168,6 +169,12 @@ while [ $# -gt 0 ]; do
 		shift 1
 		enable_install=1
 		;;
+	--out-dir)
+		shift 1
+		[ $# -gt 0 ] || usage
+		out_dir="$1"
+		shift 1
+		;;
 	--build-dir)
 		shift 1
 		[ $# -gt 0 ] || usage
@@ -408,11 +415,14 @@ fi
 
 source_dir="$abs_program_dir/.."
 
+if [ -z "$out_dir" ]; then
+	out_dir="$source_dir/tmp_cmake"
+fi
 if [ -z "$build_dir" ]; then
-	build_dir="$source_dir/tmp_cmake/build"
+	build_dir="$out_dir/build"
 fi
 if [ -z "$install_dir" ]; then
-	install_dir="$source_dir/tmp_cmake/install"
+	install_dir="$out_dir/install"
 fi
 
 echo "operating system: $os"

src/libjasper/base/jas_image.c

@@ -1007,8 +1007,9 @@ const jas_image_fmtinfo_t *jas_image_lookupfmtbyname(const char *name)
 static uint_fast32_t inttobits(jas_seqent_t v, unsigned prec, bool sgnd)
 {
 	uint_fast32_t ret;
-	ret = JAS_CAST(uint_fast32_t, ((sgnd && v < 0) ? ((1 << prec) + v) : v) &
-	  JAS_ONES(prec));
+	assert(v >= 0 || sgnd);
+	ret = ((sgnd && v < 0) ? (JAS_POW2_X(jas_seqent_t, prec) + v) : v) &
+	  JAS_ONES(prec);
 	return ret;
 }
 

src/libjasper/include/jasper/jas_math.h

@@ -116,6 +116,12 @@ extern "C" {
   set to one. */
 #define	JAS_ONES(n) \
   ((1 << (n)) - 1)
+#if 0
+#define	JAS_ONES_X(type, n) \
+  ((JAS_CAST(type, 1) << (n)) - 1)
+#endif
+#define	JAS_POW2_X(type, n) \
+  (JAS_CAST(type, 1) << (n))
 
 /******************************************************************************\
 *

src/libjasper/pgx/pgx_enc.c

@@ -219,7 +219,7 @@ static int pgx_putword(jas_stream_t *out, bool bigendian, int prec,
 static uint_fast32_t pgx_inttoword(jas_seqent_t v, int prec, bool sgnd)
 {
 	uint_fast32_t ret;
-	ret = JAS_CAST(uint_fast32_t, ((sgnd && v < 0) ? ((1 << prec) + v) : v) &
-	  ((1 << prec) - 1));
+	ret = ((sgnd && v < 0) ? (JAS_POW2_X(jas_seqent_t, prec) + v) : v) &
+	  ((1 << prec) - 1);
 	return ret;
 }