From 42d5c387e22917e286295dbfd105ffafc11d8a60 Mon Sep 17 00:00:00 2001
From: levernathan <nathan.level@gmail.com>
Date: Wed, 14 Aug 2024 15:31:58 +0800
Subject: [PATCH] jets: jet +crc32:crc:checksum

---
 pkg/noun/jets/e/crc.c | 56 +++++++++++++++++++++++++++++++++++++++++++
 pkg/noun/jets/tree.c  | 20 +++++++++++-----
 pkg/noun/jets/w.h     |  1 +
 3 files changed, 71 insertions(+), 6 deletions(-)
 create mode 100644 pkg/noun/jets/e/crc.c

diff --git a/pkg/noun/jets/e/crc.c b/pkg/noun/jets/e/crc.c
new file mode 100644
index 0000000000..b97b2cd21a
--- /dev/null
+++ b/pkg/noun/jets/e/crc.c
@@ -0,0 +1,56 @@
+/// @file
+
+#include <stdio.h>
+#include <allocate.h>
+#include "zlib.h"
+
+#include "jets/w.h"
+
+#include "noun.h"
+
+u3_noun
+u3qe_crc32(u3_noun input_octs)
+{
+  u3_atom tail = u3t(input_octs);
+  c3_w  len_w = u3r_met(3, tail);
+  c3_y* input;
+
+  if (c3y == u3a_is_cat(tail)) {
+    input = (c3_y*)&tail;
+  }
+  else {
+    u3a_atom* vat_u = u3a_to_ptr(tail);
+    input = (c3_y*)vat_u->buf_w;
+  }
+
+  c3_w p_octs_w;
+
+  if (c3n == u3r_safe_word(u3h(input_octs), &p_octs_w)) {
+    return u3_none;
+  }
+
+  c3_w lead_w = p_octs_w - len_w;
+  c3_w crc = 0L;
+
+  crc = crc32(crc, input, len_w);
+
+  c3_w zero_w = 0;
+  while (lead_w-- > 0) {
+    crc = crc32(crc, &zero_w, 1);
+  }
+
+  return u3i_word(crc);
+}
+
+u3_noun
+u3we_crc32(u3_noun cor)
+{
+  u3_noun a = u3r_at(u3x_sam, cor);
+
+  if ( (u3du(a) == c3y) && (u3ud(u3h(a))) == c3y && (u3ud(u3t(a))) == c3y) {
+    return u3qe_crc32(a);
+  }
+  else {
+    return u3m_bail(c3__exit);
+  }
+}
diff --git a/pkg/noun/jets/tree.c b/pkg/noun/jets/tree.c
index 3f15d003e0..3993440f2f 100644
--- a/pkg/noun/jets/tree.c
+++ b/pkg/noun/jets/tree.c
@@ -2341,13 +2341,20 @@ static u3j_core _138_hex_blake_d[] =
     {}
   };
 
-static u3j_harm _138_hex_adler32_a[] = {{".2", u3we_adler32, c3y}, {}};
-static u3j_core  _138_hex_adler_d[] =
-  { { "adler32", 7, _138_hex_adler32_a, 0, no_hashes },
+static u3j_harm _137_hex__adler32_a[] = {{".2", u3we_adler32, c3y}, {}};
+static u3j_core  _137_hex__adler_d[] =
+  { { "adler32", 7, _137_hex__adler32_a, 0, no_hashes },
     {}
   };
-static u3j_core _138_hex_checksum_d[] =
-  { { "adler", 7, 0, _138_hex_adler_d, no_hashes },
+static u3j_harm _137_hex__crc32_a[] = {{".2", u3we_crc32}, {}};
+static u3j_core _137_hex__crc_d[] =
+  { {"crc32", 7, _137_hex__crc32_a, 0, no_hashes },
+    {}
+  };
+
+static u3j_core _137_hex_checksum_d[] =
+  { { "adler", 3, 0, _137_hex__adler_d, no_hashes },
+    { "crc", 3, 0, _137_hex__crc_d, no_hashes},
     {}
   };
 
@@ -2369,7 +2376,7 @@ static u3j_core _138_hex_d[] =
   { "secp",    6, 0, _140_hex_secp_d,  no_hashes },
   { "mimes",  31, 0, _140_hex_mimes_d, no_hashes },
   { "json",   31, 0, _139_hex_json_d,  no_hashes },
-  { "checksum", 15, 0, _138_hex_checksum_d, no_hashes},
+  { "checksum", 15, 0, _137_hex_checksum_d, no_hashes},
   {}
 };
 
@@ -2632,6 +2639,7 @@ static u3j_core _d[] =
 { { "k140", 0, 0, _k140_d, _k140_ha,  0, (u3j_core*) 140,     0 },
   { "k139", 0, 0, _k139_d, no_hashes, 0, (u3j_core*) 139,     0 },
   { "k138", 0, 0, _k138_d, no_hashes, 0, (u3j_core*) 138,     0 },
+  { "k137", 0, 0, _k138_d, no_hashes, 0, (u3j_core*) 137,     0 },
   { "a50",  0, 0, _a50_d,  _k140_ha,  0, (u3j_core*) c3__a50, 0 },
   {}
 };
diff --git a/pkg/noun/jets/w.h b/pkg/noun/jets/w.h
index 8072718328..3898cb8633 100644
--- a/pkg/noun/jets/w.h
+++ b/pkg/noun/jets/w.h
@@ -212,6 +212,7 @@
     u3_noun u3we_blake3_compress(u3_noun);
 
     u3_noun u3we_adler32(u3_noun);
+    u3_noun u3we_crc32(u3_noun);
 
     u3_noun u3we_ripe(u3_noun);