t5318: avoid unnecessary command substitutions

[thirdparty/git.git] / hash.h

diff --git a/hash.h b/hash.h
index 7d7a864f5dd43bb53ee6b31d391df3e15cbdbb08..7c8238bc2ebfded778351b58c16a3854617082c6 100644 (file)
--- a/hash.h
+++ b/hash.h
@@ -15,6 +15,31 @@
 #include "block-sha1/sha1.h"
 #endif
 
+#ifndef platform_SHA_CTX
+/*
+ * platform's underlying implementation of SHA-1; could be OpenSSL,
+ * blk_SHA, Apple CommonCrypto, etc...  Note that the relevant
+ * SHA-1 header may have already defined platform_SHA_CTX for our
+ * own implementations like block-sha1 and ppc-sha1, so we list
+ * the default for OpenSSL compatible SHA-1 implementations here.
+ */
+#define platform_SHA_CTX       SHA_CTX
+#define platform_SHA1_Init     SHA1_Init
+#define platform_SHA1_Update   SHA1_Update
+#define platform_SHA1_Final            SHA1_Final
+#endif
+
+#define git_SHA_CTX            platform_SHA_CTX
+#define git_SHA1_Init          platform_SHA1_Init
+#define git_SHA1_Update                platform_SHA1_Update
+#define git_SHA1_Final         platform_SHA1_Final
+
+#ifdef SHA1_MAX_BLOCK_SIZE
+#include "compat/sha1-chunked.h"
+#undef git_SHA1_Update
+#define git_SHA1_Update                git_SHA1_Update_Chunked
+#endif
+
 /*
  * Note that these constants are suitable for indexing the hash_algos array and
  * comparing against each other, but are otherwise arbitrary, so they should not
@@ -30,9 +55,15 @@
 /* Number of algorithms supported (including unknown). */
 #define GIT_HASH_NALGOS (GIT_HASH_SHA1 + 1)
 
-typedef void (*git_hash_init_fn)(void *ctx);
-typedef void (*git_hash_update_fn)(void *ctx, const void *in, size_t len);
-typedef void (*git_hash_final_fn)(unsigned char *hash, void *ctx);
+/* A suitably aligned type for stack allocations of hash contexts. */
+union git_hash_ctx {
+       git_SHA_CTX sha1;
+};
+typedef union git_hash_ctx git_hash_ctx;
+
+typedef void (*git_hash_init_fn)(git_hash_ctx *ctx);
+typedef void (*git_hash_update_fn)(git_hash_ctx *ctx, const void *in, size_t len);
+typedef void (*git_hash_final_fn)(unsigned char *hash, git_hash_ctx *ctx);
 
 struct git_hash_algo {
        /*
@@ -44,9 +75,6 @@ struct git_hash_algo {
        /* A four-byte version identifier, used in pack indices. */
        uint32_t format_id;
 
-       /* The size of a hash context (e.g. git_SHA_CTX). */
-       size_t ctxsz;
-
        /* The length of the hash in binary. */
        size_t rawsz;