--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Unit tests for Unicode functions
+ *
+ * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ */
+
+#include <common.h>
+#include <charset.h>
+#include <command.h>
+#include <errno.h>
+#include <test/test.h>
+#include <test/suites.h>
+#include <test/ut.h>
+
+/* Linker list entry for a Unicode test */
+#define UNICODE_TEST(_name) UNIT_TEST(_name, 0, unicode_test)
+
+/* Constants c1-c4 and d1-d4 encode the same letters */
+
+/* Six characters translating to one utf-8 byte each. */
+static const u16 c1[] = {0x55, 0x2d, 0x42, 0x6f, 0x6f, 0x74, 0x00};
+/* One character translating to two utf-8 bytes */
+static const u16 c2[] = {0x6b, 0x61, 0x66, 0x62, 0xe1, 0x74, 0x75, 0x72, 0x00};
+/* Three characters translating to three utf-8 bytes each */
+static const u16 c3[] = {0x6f5c, 0x6c34, 0x8266, 0x00};
+/* Three letters translating to four utf-8 bytes each */
+static const u16 c4[] = {0xd801, 0xdc8d, 0xd801, 0xdc96, 0xd801, 0xdc87,
+ 0x0000};
+
+/* Illegal utf-16 strings */
+static const u16 i1[] = {0x69, 0x31, 0xdc87, 0x6c, 0x00};
+static const u16 i2[] = {0x69, 0x32, 0xd801, 0xd801, 0x6c, 0x00};
+static const u16 i3[] = {0x69, 0x33, 0xd801, 0x00};
+
+/* Six characters translating to one utf-16 word each. */
+static const char d1[] = {0x55, 0x2d, 0x42, 0x6f, 0x6f, 0x74, 0x00};
+/* Eight characters translating to one utf-16 word each */
+static const char d2[] = {0x6b, 0x61, 0x66, 0x62, 0xc3, 0xa1, 0x74, 0x75,
+ 0x72, 0x00};
+/* Three characters translating to one utf-16 word each */
+static const char d3[] = {0xe6, 0xbd, 0x9c, 0xe6, 0xb0, 0xb4, 0xe8, 0x89,
+ 0xa6, 0x00};
+/* Three letters translating to two utf-16 word each */
+static const char d4[] = {0xf0, 0x90, 0x92, 0x8d, 0xf0, 0x90, 0x92, 0x96,
+ 0xf0, 0x90, 0x92, 0x87, 0x00};
+
+/* Illegal utf-8 strings */
+static const char j1[] = {0x6a, 0x31, 0xa1, 0x6c, 0x00};
+static const char j2[] = {0x6a, 0x32, 0xc3, 0xc3, 0x6c, 0x00};
+static const char j3[] = {0x6a, 0x33, 0xf0, 0x90, 0xf0, 0x00};
+
+static int ut_utf8_get(struct unit_test_state *uts)
+{
+ const char *s;
+ s32 code;
+ int i;
+
+ /* Check characters less than 0x800 */
+ s = d2;
+ for (i = 0; i < 8; ++i) {
+ code = utf8_get((const char **)&s);
+ /* c2 is the utf-8 encoding of d2 */
+ ut_asserteq(c2[i], code);
+ if (!code)
+ break;
+ }
+ ut_asserteq_ptr(s, d2 + 9)
+
+ /* Check characters less than 0x10000 */
+ s = d3;
+ for (i = 0; i < 4; ++i) {
+ code = utf8_get((const char **)&s);
+ /* c3 is the utf-8 encoding of d3 */
+ ut_asserteq(c3[i], code);
+ if (!code)
+ break;
+ }
+ ut_asserteq_ptr(s, d3 + 9)
+
+ /* Check character greater 0xffff */
+ s = d4;
+ code = utf8_get((const char **)&s);
+ ut_asserteq(0x0001048d, code);
+ ut_asserteq_ptr(s, d4 + 4);
+
+ return 0;
+}
+UNICODE_TEST(ut_utf8_get);
+
+static int ut_utf8_put(struct unit_test_state *uts)
+{
+ char buffer[8] = { 0, };
+ char *pos;
+
+ /* Commercial at, translates to one character */
+ pos = buffer;
+ ut_assert(!utf8_put('@', &pos))
+ ut_asserteq(1, pos - buffer);
+ ut_asserteq('@', buffer[0]);
+ ut_assert(!buffer[1]);
+
+ /* Latin letter G with acute, translates to two charactes */
+ pos = buffer;
+ ut_assert(!utf8_put(0x1f4, &pos));
+ ut_asserteq(2, pos - buffer);
+ ut_asserteq_str("\xc7\xb4", buffer);
+
+ /* Tagalog letter i, translates to three characters */
+ pos = buffer;
+ ut_assert(!utf8_put(0x1701, &pos));
+ ut_asserteq(3, pos - buffer);
+ ut_asserteq_str("\xe1\x9c\x81", buffer);
+
+ /* Hamster face, translates to four characters */
+ pos = buffer;
+ ut_assert(!utf8_put(0x1f439, &pos));
+ ut_asserteq(4, pos - buffer);
+ ut_asserteq_str("\xf0\x9f\x90\xb9", buffer);
+
+ /* Illegal code */
+ pos = buffer;
+ ut_asserteq(-1, utf8_put(0xd888, &pos));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf8_put);
+
+static int ut_utf8_utf16_strlen(struct unit_test_state *uts)
+{
+ ut_asserteq(6, utf8_utf16_strlen(d1));
+ ut_asserteq(8, utf8_utf16_strlen(d2));
+ ut_asserteq(3, utf8_utf16_strlen(d3));
+ ut_asserteq(6, utf8_utf16_strlen(d4));
+
+ /* illegal utf-8 sequences */
+ ut_asserteq(4, utf8_utf16_strlen(j1));
+ ut_asserteq(5, utf8_utf16_strlen(j2));
+ ut_asserteq(3, utf8_utf16_strlen(j3));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf8_utf16_strlen);
+
+static int ut_utf8_utf16_strnlen(struct unit_test_state *uts)
+{
+ ut_asserteq(3, utf8_utf16_strnlen(d1, 3));
+ ut_asserteq(6, utf8_utf16_strnlen(d1, 13));
+ ut_asserteq(6, utf8_utf16_strnlen(d2, 6));
+ ut_asserteq(2, utf8_utf16_strnlen(d3, 2));
+ ut_asserteq(4, utf8_utf16_strnlen(d4, 2));
+ ut_asserteq(6, utf8_utf16_strnlen(d4, 3));
+
+ /* illegal utf-8 sequences */
+ ut_asserteq(4, utf8_utf16_strnlen(j1, 16));
+ ut_asserteq(5, utf8_utf16_strnlen(j2, 16));
+ ut_asserteq(3, utf8_utf16_strnlen(j3, 16));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf8_utf16_strnlen);
+
+/**
+ * ut_u16_strcmp() - Compare to u16 strings.
+ *
+ * @a1: first string
+ * @a2: second string
+ * @count: number of u16 to compare
+ * Return: -1 if a1 < a2, 0 if a1 == a2, 1 if a1 > a2
+ */
+static int ut_u16_strcmp(const u16 *a1, const u16 *a2, size_t count)
+{
+ for (; (*a1 || *a2) && count; ++a1, ++a2, --count) {
+ if (*a1 < *a2)
+ return -1;
+ if (*a1 > *a2)
+ return 1;
+ }
+ return 0;
+}
+
+static int ut_utf8_utf16_strcpy(struct unit_test_state *uts)
+{
+ u16 buf[16];
+ u16 *pos;
+
+ pos = buf;
+ utf8_utf16_strcpy(&pos, d1);
+ ut_asserteq(6, pos - buf);
+ ut_assert(!ut_u16_strcmp(buf, c1, SIZE_MAX));
+
+ pos = buf;
+ utf8_utf16_strcpy(&pos, d2);
+ ut_asserteq(8, pos - buf);
+ ut_assert(!ut_u16_strcmp(buf, c2, SIZE_MAX));
+
+ pos = buf;
+ utf8_utf16_strcpy(&pos, d3);
+ ut_asserteq(3, pos - buf);
+ ut_assert(!ut_u16_strcmp(buf, c3, SIZE_MAX));
+
+ pos = buf;
+ utf8_utf16_strcpy(&pos, d4);
+ ut_asserteq(6, pos - buf);
+ ut_assert(!ut_u16_strcmp(buf, c4, SIZE_MAX));
+
+ /* Illegal utf-8 strings */
+ pos = buf;
+ utf8_utf16_strcpy(&pos, j1);
+ ut_asserteq(4, pos - buf);
+ ut_assert(!ut_u16_strcmp(buf, L"j1?l", SIZE_MAX));
+
+ pos = buf;
+ utf8_utf16_strcpy(&pos, j2);
+ ut_asserteq(5, pos - buf);
+ ut_assert(!ut_u16_strcmp(buf, L"j2??l", SIZE_MAX));
+
+ pos = buf;
+ utf8_utf16_strcpy(&pos, j3);
+ ut_asserteq(3, pos - buf);
+ ut_assert(!ut_u16_strcmp(buf, L"j3?", SIZE_MAX));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf8_utf16_strcpy);
+
+int ut_utf8_utf16_strncpy(struct unit_test_state *uts)
+{
+ u16 buf[16];
+ u16 *pos;
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf8_utf16_strncpy(&pos, d1, 4);
+ ut_asserteq(4, pos - buf);
+ ut_assert(!buf[4]);
+ ut_assert(!ut_u16_strcmp(buf, c1, 4));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf8_utf16_strncpy(&pos, d2, 10);
+ ut_asserteq(8, pos - buf);
+ ut_assert(buf[4]);
+ ut_assert(!ut_u16_strcmp(buf, c2, SIZE_MAX));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf8_utf16_strncpy(&pos, d3, 2);
+ ut_asserteq(2, pos - buf);
+ ut_assert(!buf[2]);
+ ut_assert(!ut_u16_strcmp(buf, c3, 2));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf8_utf16_strncpy(&pos, d4, 2);
+ ut_asserteq(4, pos - buf);
+ ut_assert(!buf[4]);
+ ut_assert(!ut_u16_strcmp(buf, c4, 4));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf8_utf16_strncpy(&pos, d4, 10);
+ ut_asserteq(6, pos - buf);
+ ut_assert(buf[5]);
+ ut_assert(!ut_u16_strcmp(buf, c4, SIZE_MAX));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf8_utf16_strncpy);
+
+static int ut_utf16_get(struct unit_test_state *uts)
+{
+ const u16 *s;
+ s32 code;
+ int i;
+
+ /* Check characters less than 0x10000 */
+ s = c2;
+ for (i = 0; i < 9; ++i) {
+ code = utf16_get((const u16 **)&s);
+ ut_asserteq(c2[i], code);
+ if (!code)
+ break;
+ }
+ ut_asserteq_ptr(c2 + 8, s);
+
+ /* Check character greater 0xffff */
+ s = c4;
+ code = utf16_get((const u16 **)&s);
+ ut_asserteq(0x0001048d, code);
+ ut_asserteq_ptr(c4 + 2, s);
+
+ return 0;
+}
+UNICODE_TEST(ut_utf16_get);
+
+static int ut_utf16_put(struct unit_test_state *uts)
+{
+ u16 buffer[4] = { 0, };
+ u16 *pos;
+
+ /* Commercial at, translates to one word */
+ pos = buffer;
+ ut_assert(!utf16_put('@', &pos));
+ ut_asserteq(1, pos - buffer);
+ ut_asserteq((u16)'@', buffer[0]);
+ ut_assert(!buffer[1]);
+
+ /* Hamster face, translates to two words */
+ pos = buffer;
+ ut_assert(!utf16_put(0x1f439, &pos));
+ ut_asserteq(2, pos - buffer);
+ ut_asserteq((u16)0xd83d, buffer[0]);
+ ut_asserteq((u16)0xdc39, buffer[1]);
+ ut_assert(!buffer[2]);
+
+ /* Illegal code */
+ pos = buffer;
+ ut_asserteq(-1, utf16_put(0xd888, &pos));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf16_put);
+
+int ut_utf16_strnlen(struct unit_test_state *uts)
+{
+ ut_asserteq(3, utf16_strnlen(c1, 3));
+ ut_asserteq(6, utf16_strnlen(c1, 13));
+ ut_asserteq(6, utf16_strnlen(c2, 6));
+ ut_asserteq(2, utf16_strnlen(c3, 2));
+ ut_asserteq(2, utf16_strnlen(c4, 2));
+ ut_asserteq(3, utf16_strnlen(c4, 3));
+
+ /* illegal utf-16 word sequences */
+ ut_asserteq(4, utf16_strnlen(i1, 16));
+ ut_asserteq(4, utf16_strnlen(i2, 16));
+ ut_asserteq(3, utf16_strnlen(i3, 16));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf16_strnlen);
+
+int ut_utf16_utf8_strlen(struct unit_test_state *uts)
+{
+ ut_asserteq(6, utf16_utf8_strlen(c1));
+ ut_asserteq(9, utf16_utf8_strlen(c2));
+ ut_asserteq(9, utf16_utf8_strlen(c3));
+ ut_asserteq(12, utf16_utf8_strlen(c4));
+
+ /* illegal utf-16 word sequences */
+ ut_asserteq(4, utf16_utf8_strlen(i1));
+ ut_asserteq(4, utf16_utf8_strlen(i2));
+ ut_asserteq(3, utf16_utf8_strlen(i3));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf16_utf8_strlen);
+
+int ut_utf16_utf8_strnlen(struct unit_test_state *uts)
+{
+ ut_asserteq(3, utf16_utf8_strnlen(c1, 3));
+ ut_asserteq(6, utf16_utf8_strnlen(c1, 13));
+ ut_asserteq(7, utf16_utf8_strnlen(c2, 6));
+ ut_asserteq(6, utf16_utf8_strnlen(c3, 2));
+ ut_asserteq(8, utf16_utf8_strnlen(c4, 2));
+ ut_asserteq(12, utf16_utf8_strnlen(c4, 3));
+ return 0;
+}
+UNICODE_TEST(ut_utf16_utf8_strnlen);
+
+int ut_utf16_utf8_strcpy(struct unit_test_state *uts)
+{
+ char buf[16];
+ char *pos;
+
+ pos = buf;
+ utf16_utf8_strcpy(&pos, c1);
+ ut_asserteq(6, pos - buf);
+ ut_asserteq_str(d1, buf);
+
+ pos = buf;
+ utf16_utf8_strcpy(&pos, c2);
+ ut_asserteq(9, pos - buf);
+ ut_asserteq_str(d2, buf);
+
+ pos = buf;
+ utf16_utf8_strcpy(&pos, c3);
+ ut_asserteq(9, pos - buf);
+ ut_asserteq_str(d3, buf);
+
+ pos = buf;
+ utf16_utf8_strcpy(&pos, c4);
+ ut_asserteq(12, pos - buf);
+ ut_asserteq_str(d4, buf);
+
+ /* Illegal utf-16 strings */
+ pos = buf;
+ utf16_utf8_strcpy(&pos, i1);
+ ut_asserteq(4, pos - buf);
+ ut_asserteq_str("i1?l", buf);
+
+ pos = buf;
+ utf16_utf8_strcpy(&pos, i2);
+ ut_asserteq(4, pos - buf);
+ ut_asserteq_str("i2?l", buf);
+
+ pos = buf;
+ utf16_utf8_strcpy(&pos, i3);
+ ut_asserteq(3, pos - buf);
+ ut_asserteq_str("i3?", buf);
+
+ return 0;
+}
+UNICODE_TEST(ut_utf16_utf8_strcpy);
+
+int ut_utf16_utf8_strncpy(struct unit_test_state *uts)
+{
+ char buf[16];
+ char *pos;
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf16_utf8_strncpy(&pos, c1, 4);
+ ut_asserteq(4, pos - buf);
+ ut_assert(!buf[4]);
+ ut_assert(!strncmp(buf, d1, 4));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf16_utf8_strncpy(&pos, c2, 10);
+ ut_asserteq(9, pos - buf);
+ ut_assert(buf[4]);
+ ut_assert(!strncmp(buf, d2, SIZE_MAX));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf16_utf8_strncpy(&pos, c3, 2);
+ ut_asserteq(6, pos - buf);
+ ut_assert(!buf[6]);
+ ut_assert(!strncmp(buf, d3, 6));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf16_utf8_strncpy(&pos, c4, 2);
+ ut_asserteq(8, pos - buf);
+ ut_assert(!buf[8]);
+ ut_assert(!strncmp(buf, d4, 8));
+
+ pos = buf;
+ memset(buf, 0, sizeof(buf));
+ utf16_utf8_strncpy(&pos, c4, 10);
+ ut_asserteq(12, pos - buf);
+ ut_assert(buf[5]);
+ ut_assert(!strncmp(buf, d4, SIZE_MAX));
+
+ return 0;
+}
+UNICODE_TEST(ut_utf16_utf8_strncpy);
+
+int do_ut_unicode(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ struct unit_test *tests = ll_entry_start(struct unit_test, unicode_test);
+ const int n_ents = ll_entry_count(struct unit_test, unicode_test);
+
+ return cmd_ut_category("Unicode", tests, n_ents, argc, argv);
+}
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