sync code with last improvements from OpenBSD

lib/libXpm/test/rgb.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "config.h"
+
+#include "../src/XpmI.h"
+#include <glib.h>
+
+/*
+ * xpmReadRgbNames - reads a rgb text file
+ */
+
+struct rgbData {
+    int r, g, b;
+    const char *name;
+};
+
+/* Changes here must match those in rgb.txt file */
+static const struct rgbData testdata[] = {
+    { 255, 255, 255, "white" },
+    {   0,   0,   0, "black" },
+    { 255,   0,   0, "red" },
+    {   0, 255,   0, "green" },
+    {   0,   0, 255, "blue" },
+    {   0,  50,  98, "berkeleyblue" }, /* names get lowercased */
+    { 253, 181,  21, "californiagold" }
+};
+#define NUM_RGB (sizeof(testdata) / sizeof(testdata[0]))
+
+static void
+test_xpmReadRgbNames(void)
+{
+    const gchar *filename;
+    xpmRgbName rgbn[MAX_RGBNAMES];
+    int rgbn_max;
+
+    /* Verify NULL is returned if file can't be read */
+    rgbn_max = xpmReadRgbNames("non-existent-file.txt", rgbn);
+    g_assert_cmpint(rgbn_max, ==, 0);
+
+    /* Verify our test file is read properly & contains expected data */
+    filename = g_test_get_filename(G_TEST_DIST, "rgb.txt", NULL);
+    rgbn_max = xpmReadRgbNames(filename, rgbn);
+    g_assert_cmpint(rgbn_max, ==, NUM_RGB);
+
+    for (unsigned int i = 0; i < NUM_RGB; i++) {
+        int r = testdata[i].r * 257;
+        int g = testdata[i].g * 257;
+        int b = testdata[i].b * 257;
+        char *name = xpmGetRgbName(rgbn, rgbn_max, r, g, b);
+
+        g_assert_cmpstr(name, ==, testdata[i].name);
+    }
+
+    g_assert_null(xpmGetRgbName(rgbn, rgbn_max, 11, 11, 11));
+
+    xpmFreeRgbNames(rgbn, rgbn_max);
+}
+
+
+int
+main(int argc, char** argv)
+{
+    g_test_init(&argc, &argv, NULL);
+    g_test_bug_base(PACKAGE_BUGREPORT);
+
+    g_test_add_func("/rgb/xpmReadRgbNames",
+                    test_xpmReadRgbNames);
+
+    return g_test_run();
+}