src/cmp.{c,h}: Add minimal implementation of cmp_size()

4 files changed, 86 insertions, 0 deletions

diff --git a/deps.mk b/deps.mk
index bd2415d..bb910a4 100644
--- a/deps.mk
+++ b/deps.mk
@@ -4,6 +4,7 @@ catalogs.msg = $(catalogs.en.msg)
 
 sources.c = \
 	src/catalog.c \
+	src/cmp.c \
 	src/hash.c \
 	src/i18n.c \
 	src/lib.c \
@@ -20,6 +21,7 @@ sources.c = \
 
 tests.c = \
 	tests/catalog.c \
+	tests/cmp.c \
 	tests/hash.c \
 	tests/i18n.c \
 	tests/lib.c \
@@ -35,6 +37,7 @@ tests.c = \
 	tests/vector.c \
 
 src/catalog.o:	src/catalog.h
+src/cmp.o:	src/cmp.h
 src/hash.o:	src/hash.h
 src/i18n.o:	src/i18n.h
 src/lib.o:	src/lib.h
@@ -50,6 +53,7 @@ src/util.o:	src/util.h
 src/vector.o:	src/vector.h
 
 tests/catalog.o:	src/catalog.c	src/catalog.h
+tests/cmp.o:	src/cmp.c	src/cmp.h
 tests/hash.o:	src/hash.c	src/hash.h
 tests/i18n.o:	src/i18n.c	src/i18n.h
 tests/lib.o:	src/lib.c	src/lib.h
@@ -65,6 +69,7 @@ tests/util.o:	src/util.c	src/util.h
 tests/vector.o:	src/vector.c	src/vector.h
 
 tests/catalog.a:	tests/catalog.o
+tests/cmp.a:	tests/cmp.o
 tests/hash.a:	tests/hash.o
 tests/i18n.a:	tests/i18n.o
 tests/lib.a:	tests/lib.o
@@ -80,6 +85,7 @@ tests/util.a:	tests/util.o
 tests/vector.a:	tests/vector.o
 
 tests/catalog.bin-check:	tests/catalog.bin
+tests/cmp.bin-check:	tests/cmp.bin
 tests/hash.bin-check:	tests/hash.bin
 tests/i18n.bin-check:	tests/i18n.bin
 tests/lib.bin-check:	tests/lib.bin
@@ -96,6 +102,7 @@ tests/vector.bin-check:	tests/vector.bin
 
 
 src/catalog.o: src/logerr.h
+src/cmp.o:
 src/hash.o: src/logerr.h src/random.h
 src/i18n.o: src/catalog.h
 src/lib.o: src/logerr.h
@@ -111,6 +118,7 @@ src/util.o: src/logerr.h
 src/vector.o: src/catalog.h src/i18n.h src/logerr.h src/math.h src/util.h
 
 tests/catalog.o: src/logerr.h src/testing.h src/util.h tests/slurp.h
+tests/cmp.o: src/testing.h
 tests/hash.o: src/logerr.h src/random.h src/testing.h
 tests/i18n.o: src/catalog.h src/logerr.h
 tests/lib.o: src/logerr.h
@@ -126,6 +134,7 @@ tests/util.o: src/logerr.h src/testing.h tests/slurp.h
 tests/vector.o: src/catalog.h src/i18n.h src/logerr.h src/math.h src/util.h src/testing.h
 
 tests/catalog.a: src/logerr.o src/testing.o src/util.o tests/slurp.o
+tests/cmp.a: src/testing.o
 tests/hash.a: src/logerr.o src/random.o src/testing.o src/util.o
 tests/i18n.a: src/catalog.o src/logerr.o
 tests/lib.a: src/logerr.o
diff --git a/src/cmp.c b/src/cmp.c
new file mode 100644
index 0000000..9784aae
--- /dev/null
+++ b/src/cmp.c
@@ -0,0 +1,20 @@
+#include "config.h"
+
+#include <stddef.h>
+
+#include "cmp.h"
+
+
+
+enum Comparison
+cmp_size(const size_t a, const size_t b) {
+	if (a > b) {
+		return Comparison_GREATER;
+	}
+
+	if (a < b) {
+		return Comparison_LESSER;
+	}
+
+	return Comparison_EQUAL;
+}
diff --git a/src/cmp.h b/src/cmp.h
new file mode 100644
index 0000000..0fbfe39
--- /dev/null
+++ b/src/cmp.h
@@ -0,0 +1,10 @@
+enum Comparison {
+	Comparison_LESSER,
+	Comparison_EQUAL,
+	Comparison_GREATER,
+};
+
+
+
+enum Comparison
+cmp_size(const size_t a, const size_t b);
diff --git a/tests/cmp.c b/tests/cmp.c
new file mode 100644
index 0000000..943402f
--- /dev/null
+++ b/tests/cmp.c
@@ -0,0 +1,47 @@
+#include "../src/cmp.c"
+
+#include <assert.h>
+#include <stdint.h>
+
+#include "../src/testing.h"
+
+
+
+static void
+test_cmp_size(void) {
+	test_start("cmp_size()");
+
+	{
+		testing("equal values");
+
+		assert(cmp_size(0U, 0U) == Comparison_EQUAL);
+		assert(cmp_size(SIZE_MAX, SIZE_MAX) == Comparison_EQUAL);
+		assert(cmp_size(123U, 122U + 1U) == Comparison_EQUAL);
+
+		test_ok();
+	}
+	{
+		testing("greater values");
+
+		assert(cmp_size(1U, 0U) == Comparison_GREATER);
+		assert(cmp_size(1234U, 1222U) == Comparison_GREATER);
+		assert(cmp_size(SIZE_MAX, SIZE_MAX - 1U) == Comparison_GREATER);
+
+		test_ok();
+	}
+	{
+		testing("lesser values");
+
+		assert(cmp_size(0U, 1U) == Comparison_LESSER);
+		assert(cmp_size(12U, 34U) == Comparison_LESSER);
+		assert(cmp_size(0U, SIZE_MAX) == Comparison_LESSER);
+
+		test_ok();
+	}
+}
+
+int
+main(void) {
+	test_cmp_size();
+	return 0;
+}