boot: Add strcpy8/16

src/boot/efi/efi-string.c

@@ -98,3 +98,26 @@ int strcasecmp8(const char *s1, const char *s2) {
 int strcasecmp16(const char16_t *s1, const char16_t *s2) {
         return strncasecmp16(s1, s2, SIZE_MAX);
 }
+
+#define DEFINE_STRCPY(type, name)                                     \
+        type *name(type * restrict dest, const type * restrict src) { \
+                assert(dest);                                         \
+                type *ret = dest;                                     \
+                                                                      \
+                if (!src) {                                           \
+                        *dest = '\0';                                 \
+                        return ret;                                   \
+                }                                                     \
+                                                                      \
+                while (*src) {                                        \
+                        *dest = *src;                                 \
+                        dest++;                                       \
+                        src++;                                        \
+                }                                                     \
+                                                                      \
+                *dest = '\0';                                         \
+                return ret;                                           \
+        }
+
+DEFINE_STRCPY(char, strcpy8);
+DEFINE_STRCPY(char16_t, strcpy16);

src/boot/efi/efi-string.h

@@ -57,3 +57,6 @@ static inline bool strcaseeq8(const char *s1, const char *s2) {
 static inline bool strcaseeq16(const char16_t *s1, const char16_t *s2) {
         return strcasecmp16(s1, s2) == 0;
 }
+
+char *strcpy8(char * restrict dest, const char * restrict src);
+char16_t *strcpy16(char16_t * restrict dest, const char16_t * restrict src);

src/boot/efi/test-efi-string.c

@@ -174,4 +174,30 @@ TEST(strncasecmp16) {
         assert_se(strncasecmp16((char16_t[]){ UINT16_MAX }, (char16_t[]){ 0 }, 1) > 0);
 }
 
+TEST(strcpy8) {
+        char buf[128];
+
+        assert_se(strcpy8(buf, "123") == buf);
+        assert_se(streq8(buf, "123"));
+        assert_se(strcpy8(buf, "") == buf);
+        assert_se(streq8(buf, ""));
+        assert_se(strcpy8(buf, "A") == buf);
+        assert_se(streq8(buf, "A"));
+        assert_se(strcpy8(buf, NULL) == buf);
+        assert_se(streq8(buf, ""));
+}
+
+TEST(strcpy16) {
+        char16_t buf[128];
+
+        assert_se(strcpy16(buf, u"123") == buf);
+        assert_se(streq16(buf, u"123"));
+        assert_se(strcpy16(buf, u"") == buf);
+        assert_se(streq16(buf, u""));
+        assert_se(strcpy16(buf, u"A") == buf);
+        assert_se(streq16(buf, u"A"));
+        assert_se(strcpy16(buf, NULL) == buf);
+        assert_se(streq16(buf, u""));
+}
+
 DEFINE_TEST_MAIN(LOG_INFO);