Compare operator test suite: forward and reverse compares; edge and corner cases; literals, autos, statics, simple expressions; signed and unsigned; some special cases.

2026-03-09 20:04:59 -04:00
parent d45fac3afe
commit 76d71aec92
16 changed files with 3906 additions and 0 deletions
--- a/test/val/compare-rev21.c
+++ b/test/val/compare-rev21.c
@@ -0,0 +1,136 @@
+/* Exercise compare operator edge cases in forward and reverse forms;
+**   unsigned char: literals, autos.
+** Note: will cause many compiler warnings:
+** -- Result of comparison is always (true|false)
+** -- Unreachable code
+** 
+** License: Public Domain
+**
+** This software is provided 'as-is', without any express or implied warranty.
+** In no event will the authors be held liable for any damages arising from
+** the use of this software.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define TEST_NAME  "compare-rev21"
+
+#include "compare-rev.h"
+
+/* Compared values are signed int literals */
+#define N256    -256
+#define N255    -255
+#define N1      -1
+#define ZERO    0
+#define P1      1
+#define P255    255
+#define P256    256
+#define P257    257
+#define P32767  32767
+
+/* unsigned char to signed literal compares */
+static void uchar_loc_to_slit_11(void)
+{
+    unsigned char v;
+
+    v = 0;
+    marker = 0x1100; /* +8 for each macro */
+
+    MUST_BE_GREATER_THAN(v, N256);
+    MUST_BE_GREATER_THAN(v, N255);
+    MUST_BE_GREATER_THAN(v, N1);
+    MUST_BE_EQUAL(v, ZERO);
+    MUST_BE_LESS_THAN(v, P1);
+    MUST_BE_LESS_THAN(v, P255);
+    MUST_BE_LESS_THAN(v, P256);
+    MUST_BE_LESS_THAN(v, P257);
+    MUST_BE_LESS_THAN(v, P32767);
+}
+
+static void uchar_loc_to_slit_13(void)
+{
+    unsigned char v;
+
+    v = 1;
+    marker = 0x1300; /* +8 for each macro */
+
+    MUST_BE_GREATER_THAN(v, N256);
+    MUST_BE_GREATER_THAN(v, N255);
+    MUST_BE_GREATER_THAN(v, N1);
+    MUST_BE_GREATER_THAN(v, ZERO);
+    MUST_BE_EQUAL(v, P1);
+    MUST_BE_LESS_THAN(v, P255);
+    MUST_BE_LESS_THAN(v, P256);
+    MUST_BE_LESS_THAN(v, P257);
+    MUST_BE_LESS_THAN(v, P32767);
+}
+
+static void uchar_loc_to_slit_15(void)
+{
+    unsigned char v;
+
+    v = 2;
+    marker = 0x1500; /* +8 for each macro */
+
+    MUST_BE_GREATER_THAN(v, N256);
+    MUST_BE_GREATER_THAN(v, N255);
+    MUST_BE_GREATER_THAN(v, N1);
+    MUST_BE_GREATER_THAN(v, ZERO);
+    MUST_BE_GREATER_THAN(v, P1);
+    MUST_BE_LESS_THAN(v, P255);
+    MUST_BE_LESS_THAN(v, P256);
+    MUST_BE_LESS_THAN(v, P257);
+    MUST_BE_LESS_THAN(v, P32767);
+}
+
+static void uchar_loc_to_slit_17(void)
+{
+    unsigned char v;
+
+    v = 254;
+    marker = 0x1700; /* +8 for each macro */
+
+    MUST_BE_GREATER_THAN(v, N256);
+    MUST_BE_GREATER_THAN(v, N255);
+    MUST_BE_GREATER_THAN(v, N1);
+    MUST_BE_GREATER_THAN(v, ZERO);
+    MUST_BE_GREATER_THAN(v, P1);
+    MUST_BE_LESS_THAN(v, P255);
+    MUST_BE_LESS_THAN(v, P256);
+    MUST_BE_LESS_THAN(v, P257);
+    MUST_BE_LESS_THAN(v, P32767);
+}
+
+static void uchar_loc_to_slit_19(void)
+{
+    unsigned char v;
+
+    v = 255;
+    marker = 0x1900; /* +8 for each macro */
+
+    MUST_BE_GREATER_THAN(v, N256);
+    MUST_BE_GREATER_THAN(v, N255);
+    MUST_BE_GREATER_THAN(v, N1);
+    MUST_BE_GREATER_THAN(v, ZERO);
+    MUST_BE_GREATER_THAN(v, P1);
+    MUST_BE_EQUAL(v, P255);
+    MUST_BE_LESS_THAN(v, P256);
+    MUST_BE_LESS_THAN(v, P257);
+    MUST_BE_LESS_THAN(v, P32767);
+}
+
+int main(void)
+{
+    marker = 0x01;
+
+    uchar_loc_to_slit_11();
+    uchar_loc_to_slit_13();
+    uchar_loc_to_slit_15();
+    uchar_loc_to_slit_17();
+    uchar_loc_to_slit_19();
+
+    printf(TEST_NAME " failures: %d\n", failures);
+
+    return failures ? EXIT_FAILURE : EXIT_SUCCESS;
+}