now with configurable data size!

Signed-off-by: Gediminas Jakutis <gediminas@varciai.lt>

3 files changed, 34 insertions, 1 deletions

diff --git a/meson.build b/meson.build
index da58251..f378dcc 100644
--- a/meson.build
+++ b/meson.build
@@ -8,6 +8,11 @@ progname = 'alg'
 
 add_project_arguments('-D', '_GNU_SOURCE', language : 'c')
 add_project_arguments('-fplan9-extensions', language : 'c')
+add_project_arguments('-D', 'entry_field_size=' + get_option('data-bitness'), language : 'c')
+
+if get_option('data-signed').enabled()
+  add_project_arguments('-D', 'entry_field_signed', language : 'c')
+endif
 
 subdir('src')
 
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..ab26488
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,9 @@
+option('data-signed',
+	type : 'feature',
+	value : 'disabled',
+	description : 'Switch whether to use signed data type')
+option('data-bitness',
+	type : 'combo',
+	choices : ['64', '32', '16'],
+	value : '64',
+	description : 'Size of a data entry to use, in bits')
diff --git a/src/defs.h b/src/defs.h
index f6a7f91..a7a678d 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -22,6 +22,25 @@
 		goto l;\
 	}} while (0);
 
+#if entry_field_size == 16
+#	ifdef entry_field_signed
+		typedef int16_t field;
+#	else
+		typedef uint16_t field;
+#	endif
+#elif entry_field_size == 32
+#	ifdef entry_field_signed
+		typedef int32_t field;
+#	else
+		typedef uint32_t field;
+#	endif
+#else
+#	ifdef entry_field_signed
+		typedef int64_t field;
+#	else
+		typedef uint64_t field;
+#	endif
+#endif
 
 #define get(in) (in->settings->access == cached ? in->get_next_element_cache(in) : in->get_next_element_direct(in))
 #define put(in, data) (in->settings->access == cached ? in->place_next_element_cache(in, data) : in->place_next_element_direct(in, data))
@@ -44,7 +63,7 @@ union cachewrap {
 
 /* for array implementation */
 struct entry {
-	uint64_t val;
+	field val;
 };
 
 /* for linked list implementation */