1 files changed, 74 insertions, 0 deletions
diff --git a/src/shared/id128-print.c b/src/shared/id128-print.c
new file mode 100644
index 0000000..c9509b2
--- /dev/null
+++ b/src/shared/id128-print.c
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <stdio.h>
+
+#include "sd-id128.h"
+
+#include "alloc-util.h"
+#include "id128-print.h"
+#include "log.h"
+#include "pretty-print.h"
+#include "terminal-util.h"
+
+int id128_pretty_print_sample(const char *name, sd_id128_t id) {
+        _cleanup_free_ char *man_link = NULL, *mod_link = NULL;
+
+        const char *on = ansi_highlight(),
+                   *off = ansi_normal();
+
+        if (terminal_urlify("man:systemd-id128(1)", "systemd-id128(1)", &man_link) < 0)
+                return log_oom();
+
+        if (terminal_urlify("https://docs.python.org/3/library/uuid.html", "uuid", &mod_link) < 0)
+                return log_oom();
+
+        printf("As string:\n"
+               "%s" SD_ID128_FORMAT_STR "%s\n\n"
+               "As UUID:\n"
+               "%s" SD_ID128_UUID_FORMAT_STR "%s\n\n"
+               "As %s macro:\n"
+               "%s#define %s SD_ID128_MAKE(",
+               on, SD_ID128_FORMAT_VAL(id), off,
+               on, SD_ID128_FORMAT_VAL(id), off,
+               man_link,
+               on, name);
+        for (size_t i = 0; i < 16; i++)
+                printf("%02x%s", id.bytes[i], i < 15 ? "," : "");
+        printf(")%s\n\n", off);
+
+        printf("As Python constant:\n"
+               ">>> import %s\n"
+               ">>> %s%s = uuid.UUID('" SD_ID128_FORMAT_STR "')%s\n",
+               mod_link,
+               on, name, SD_ID128_FORMAT_VAL(id), off);
+
+        return 0;
+}
+
+
+int id128_pretty_print(sd_id128_t id, Id128PrettyPrintMode mode) {
+        assert(mode >= 0);
+        assert(mode < _ID128_PRETTY_PRINT_MODE_MAX);
+
+        if (mode == ID128_PRINT_ID128) {
+                printf(SD_ID128_FORMAT_STR "\n",
+                       SD_ID128_FORMAT_VAL(id));
+                return 0;
+        } else if (mode == ID128_PRINT_UUID) {
+                printf(SD_ID128_UUID_FORMAT_STR "\n",
+                       SD_ID128_FORMAT_VAL(id));
+                return 0;
+        } else
+                return id128_pretty_print_sample("XYZ", id);
+}
+
+int id128_print_new(Id128PrettyPrintMode mode) {
+        sd_id128_t id;
+        int r;
+
+        r = sd_id128_randomize(&id);
+        if (r < 0)
+                return log_error_errno(r, "Failed to generate ID: %m");
+
+        return id128_pretty_print(id, mode);
+}