mesa: Add functions to print blake3

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28156>

src/util/mesa-blake3.c

@@ -20,8 +20,9 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#include <string.h>
+#include <inttypes.h>
 #include "mesa-blake3.h"
-
 #include "hex.h"
 
 void _mesa_blake3_format(char *buf, const unsigned char *blake3)
@@ -40,4 +41,34 @@ void _mesa_blake3_compute(const void *data, size_t size, blake3_hash result)
   _mesa_blake3_init(&ctx);
   _mesa_blake3_update(&ctx, data, size);
   _mesa_blake3_final(&ctx, result);
+}
+
+static void
+blake3_to_uint32(const blake3_hash blake3,
+                 uint32_t out[BLAKE3_OUT_LEN32])
+{
+   memset(out, 0, BLAKE3_OUT_LEN);
+
+   for (unsigned i = 0; i < BLAKE3_OUT_LEN; i++)
+      out[i / 4] |= (uint32_t)blake3[i] << ((i % 4) * 8);
+}
+
+void
+_mesa_blake3_print(FILE *f, const blake3_hash blake3)
+{
+   uint32_t u32[BLAKE3_OUT_LEN32];
+   blake3_to_uint32(blake3, u32);
+   for (unsigned i = 0; i < BLAKE3_OUT_LEN32; i++) {
+      fprintf(f, i ? ", 0x%08" PRIx32 : "0x%08" PRIx32, u32[i]);
+   }
+}
+
+bool
+_mesa_printed_blake3_equal(const blake3_hash blake3,
+                           const uint32_t printed_blake3[BLAKE3_OUT_LEN32])
+{
+   uint32_t u32[BLAKE3_OUT_LEN32];
+   blake3_to_uint32(blake3, u32);
+
+   return memcmp(u32, printed_blake3, sizeof(u32)) == 0;
 }

src/util/mesa-blake3.h

@@ -23,6 +23,9 @@
 #ifndef MESA_BLAKE3_H
 #define MESA_BLAKE3_H
 
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
 #include "blake3/blake3.h"
 
 #ifdef __cplusplus
@@ -30,6 +33,8 @@ extern "C" {
 #endif
 
 #define mesa_blake3 blake3_hasher
+#define BLAKE3_OUT_LEN32 (BLAKE3_OUT_LEN / 4)
+#define BLAKE3_HEX_LEN (2 * BLAKE3_OUT_LEN + 1)
 
 typedef uint8_t blake3_hash[BLAKE3_OUT_LEN];
 
@@ -60,9 +65,15 @@ _mesa_blake3_hex_to_blake3(unsigned char *buf, const char *hex);
 void
 _mesa_blake3_compute(const void *data, size_t size, blake3_hash result);
 
+void
+_mesa_blake3_print(FILE *f, const blake3_hash blake3);
+
+bool
+_mesa_printed_blake3_equal(const blake3_hash blake3,
+                           const uint32_t printed_blake3[BLAKE3_OUT_LEN32]);
+
 #ifdef __cplusplus
 } /* extern C */
 #endif
 
-
 #endif