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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
commitc8bae7493d2f2910b57f13ded012e86bdcfb0532 (patch)
tree24e09d9f84dec336720cf393e156089ca2835791 /hex.c
parentInitial commit. (diff)
downloadgit-c8bae7493d2f2910b57f13ded012e86bdcfb0532.tar.xz
git-c8bae7493d2f2910b57f13ded012e86bdcfb0532.zip
Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--hex.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/hex.c b/hex.c
new file mode 100644
index 0000000..4f64d34
--- /dev/null
+++ b/hex.c
@@ -0,0 +1,165 @@
+#include "cache.h"
+
+const signed char hexval_table[256] = {
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */
+ 0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */
+ 8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */
+ -1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */
+ -1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */
+};
+
+int hex_to_bytes(unsigned char *binary, const char *hex, size_t len)
+{
+ for (; len; len--, hex += 2) {
+ unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]);
+
+ if (val & ~0xff)
+ return -1;
+ *binary++ = val;
+ }
+ return 0;
+}
+
+static int get_hash_hex_algop(const char *hex, unsigned char *hash,
+ const struct git_hash_algo *algop)
+{
+ int i;
+ for (i = 0; i < algop->rawsz; i++) {
+ int val = hex2chr(hex);
+ if (val < 0)
+ return -1;
+ *hash++ = val;
+ hex += 2;
+ }
+ return 0;
+}
+
+int get_sha1_hex(const char *hex, unsigned char *sha1)
+{
+ return get_hash_hex_algop(hex, sha1, the_hash_algo);
+}
+
+int get_oid_hex_algop(const char *hex, struct object_id *oid,
+ const struct git_hash_algo *algop)
+{
+ int ret = get_hash_hex_algop(hex, oid->hash, algop);
+ if (!ret)
+ oid_set_algo(oid, algop);
+ return ret;
+}
+
+/*
+ * NOTE: This function relies on hash algorithms being in order from shortest
+ * length to longest length.
+ */
+int get_oid_hex_any(const char *hex, struct object_id *oid)
+{
+ int i;
+ for (i = GIT_HASH_NALGOS - 1; i > 0; i--) {
+ if (!get_oid_hex_algop(hex, oid, &hash_algos[i]))
+ return i;
+ }
+ return GIT_HASH_UNKNOWN;
+}
+
+int get_oid_hex(const char *hex, struct object_id *oid)
+{
+ return get_oid_hex_algop(hex, oid, the_hash_algo);
+}
+
+int parse_oid_hex_algop(const char *hex, struct object_id *oid,
+ const char **end,
+ const struct git_hash_algo *algop)
+{
+ int ret = get_oid_hex_algop(hex, oid, algop);
+ if (!ret)
+ *end = hex + algop->hexsz;
+ return ret;
+}
+
+int parse_oid_hex_any(const char *hex, struct object_id *oid, const char **end)
+{
+ int ret = get_oid_hex_any(hex, oid);
+ if (ret)
+ *end = hex + hash_algos[ret].hexsz;
+ return ret;
+}
+
+int parse_oid_hex(const char *hex, struct object_id *oid, const char **end)
+{
+ return parse_oid_hex_algop(hex, oid, end, the_hash_algo);
+}
+
+char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash,
+ const struct git_hash_algo *algop)
+{
+ static const char hex[] = "0123456789abcdef";
+ char *buf = buffer;
+ int i;
+
+ /*
+ * Our struct object_id has been memset to 0, so default to printing
+ * using the default hash.
+ */
+ if (algop == &hash_algos[0])
+ algop = the_hash_algo;
+
+ for (i = 0; i < algop->rawsz; i++) {
+ unsigned int val = *hash++;
+ *buf++ = hex[val >> 4];
+ *buf++ = hex[val & 0xf];
+ }
+ *buf = '\0';
+
+ return buffer;
+}
+
+char *oid_to_hex_r(char *buffer, const struct object_id *oid)
+{
+ return hash_to_hex_algop_r(buffer, oid->hash, &hash_algos[oid->algo]);
+}
+
+char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *algop)
+{
+ static int bufno;
+ static char hexbuffer[4][GIT_MAX_HEXSZ + 1];
+ bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
+ return hash_to_hex_algop_r(hexbuffer[bufno], hash, algop);
+}
+
+char *hash_to_hex(const unsigned char *hash)
+{
+ return hash_to_hex_algop(hash, the_hash_algo);
+}
+
+char *oid_to_hex(const struct object_id *oid)
+{
+ return hash_to_hex_algop(oid->hash, &hash_algos[oid->algo]);
+}