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More header clean-up. * en/header-split-cache-h-part-2: (22 commits) reftable: ensure git-compat-util.h is the first (indirect) include diff.h: reduce unnecessary includes object-store.h: reduce unnecessary includes commit.h: reduce unnecessary includes fsmonitor: reduce includes of cache.h cache.h: remove unnecessary headers treewide: remove cache.h inclusion due to previous changes cache,tree: move basic name compare functions from read-cache to tree cache,tree: move cmp_cache_name_compare from tree.[ch] to read-cache.c hash-ll.h: split out of hash.h to remove dependency on repository.h tree-diff.c: move S_DIFFTREE_IFXMIN_NEQ define from cache.h dir.h: move DTYPE defines from cache.h versioncmp.h: move declarations for versioncmp.c functions from cache.h ws.h: move declarations for ws.c functions from cache.h match-trees.h: move declarations for match-trees.c functions from cache.h pkt-line.h: move declarations for pkt-line.c functions from cache.h base85.h: move declarations for base85.c functions from cache.h copy.h: move declarations for copy.c functions from cache.h server-info.h: move declarations for server-info.c functions from cache.h packfile.h: move pack_window and pack_entry from cache.h ...main
Junio C Hamano
1 year ago
217 changed files with 786 additions and 545 deletions
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@@ -0,0 +1,7 @@
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#ifndef BASE85_H |
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#define BASE85_H |
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int decode_85(char *dst, const char *line, int linelen); |
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void encode_85(char *buf, const unsigned char *data, int bytes); |
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#endif /* BASE85_H */ |
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#ifndef COPY_H |
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#define COPY_H |
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#define COPY_READ_ERROR (-2) |
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#define COPY_WRITE_ERROR (-3) |
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int copy_fd(int ifd, int ofd); |
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int copy_file(const char *dst, const char *src, int mode); |
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int copy_file_with_time(const char *dst, const char *src, int mode); |
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#endif /* COPY_H */ |
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#ifndef HASH_LL_H |
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#define HASH_LL_H |
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#if defined(SHA1_APPLE) |
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#include <CommonCrypto/CommonDigest.h> |
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#elif defined(SHA1_OPENSSL) |
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#include <openssl/sha.h> |
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#elif defined(SHA1_DC) |
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#include "sha1dc_git.h" |
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#else /* SHA1_BLK */ |
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#include "block-sha1/sha1.h" |
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#endif |
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#if defined(SHA256_NETTLE) |
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#include "sha256/nettle.h" |
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#elif defined(SHA256_GCRYPT) |
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#define SHA256_NEEDS_CLONE_HELPER |
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#include "sha256/gcrypt.h" |
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#elif defined(SHA256_OPENSSL) |
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#include <openssl/sha.h> |
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#else |
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#include "sha256/block/sha256.h" |
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#endif |
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#ifndef platform_SHA_CTX |
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/* |
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* platform's underlying implementation of SHA-1; could be OpenSSL, |
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* blk_SHA, Apple CommonCrypto, etc... Note that the relevant |
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* SHA-1 header may have already defined platform_SHA_CTX for our |
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* own implementations like block-sha1, so we list |
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* the default for OpenSSL compatible SHA-1 implementations here. |
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*/ |
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#define platform_SHA_CTX SHA_CTX |
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#define platform_SHA1_Init SHA1_Init |
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#define platform_SHA1_Update SHA1_Update |
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#define platform_SHA1_Final SHA1_Final |
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#endif |
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#define git_SHA_CTX platform_SHA_CTX |
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#define git_SHA1_Init platform_SHA1_Init |
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#define git_SHA1_Update platform_SHA1_Update |
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#define git_SHA1_Final platform_SHA1_Final |
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#ifndef platform_SHA256_CTX |
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#define platform_SHA256_CTX SHA256_CTX |
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#define platform_SHA256_Init SHA256_Init |
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#define platform_SHA256_Update SHA256_Update |
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#define platform_SHA256_Final SHA256_Final |
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#endif |
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#define git_SHA256_CTX platform_SHA256_CTX |
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#define git_SHA256_Init platform_SHA256_Init |
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#define git_SHA256_Update platform_SHA256_Update |
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#define git_SHA256_Final platform_SHA256_Final |
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#ifdef platform_SHA256_Clone |
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#define git_SHA256_Clone platform_SHA256_Clone |
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#endif |
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#ifdef SHA1_MAX_BLOCK_SIZE |
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#include "compat/sha1-chunked.h" |
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#undef git_SHA1_Update |
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#define git_SHA1_Update git_SHA1_Update_Chunked |
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#endif |
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static inline void git_SHA1_Clone(git_SHA_CTX *dst, const git_SHA_CTX *src) |
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{ |
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memcpy(dst, src, sizeof(*dst)); |
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} |
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#ifndef SHA256_NEEDS_CLONE_HELPER |
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static inline void git_SHA256_Clone(git_SHA256_CTX *dst, const git_SHA256_CTX *src) |
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{ |
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memcpy(dst, src, sizeof(*dst)); |
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} |
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#endif |
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/* |
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* Note that these constants are suitable for indexing the hash_algos array and |
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* comparing against each other, but are otherwise arbitrary, so they should not |
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* be exposed to the user or serialized to disk. To know whether a |
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* git_hash_algo struct points to some usable hash function, test the format_id |
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* field for being non-zero. Use the name field for user-visible situations and |
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* the format_id field for fixed-length fields on disk. |
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*/ |
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/* An unknown hash function. */ |
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#define GIT_HASH_UNKNOWN 0 |
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/* SHA-1 */ |
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#define GIT_HASH_SHA1 1 |
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/* SHA-256 */ |
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#define GIT_HASH_SHA256 2 |
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/* Number of algorithms supported (including unknown). */ |
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#define GIT_HASH_NALGOS (GIT_HASH_SHA256 + 1) |
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/* "sha1", big-endian */ |
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#define GIT_SHA1_FORMAT_ID 0x73686131 |
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/* The length in bytes and in hex digits of an object name (SHA-1 value). */ |
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#define GIT_SHA1_RAWSZ 20 |
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#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) |
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/* The block size of SHA-1. */ |
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#define GIT_SHA1_BLKSZ 64 |
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/* "s256", big-endian */ |
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#define GIT_SHA256_FORMAT_ID 0x73323536 |
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/* The length in bytes and in hex digits of an object name (SHA-256 value). */ |
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#define GIT_SHA256_RAWSZ 32 |
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#define GIT_SHA256_HEXSZ (2 * GIT_SHA256_RAWSZ) |
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/* The block size of SHA-256. */ |
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#define GIT_SHA256_BLKSZ 64 |
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/* The length in byte and in hex digits of the largest possible hash value. */ |
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#define GIT_MAX_RAWSZ GIT_SHA256_RAWSZ |
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#define GIT_MAX_HEXSZ GIT_SHA256_HEXSZ |
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/* The largest possible block size for any supported hash. */ |
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#define GIT_MAX_BLKSZ GIT_SHA256_BLKSZ |
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struct object_id { |
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unsigned char hash[GIT_MAX_RAWSZ]; |
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int algo; /* XXX requires 4-byte alignment */ |
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}; |
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#define GET_OID_QUIETLY 01 |
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#define GET_OID_COMMIT 02 |
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#define GET_OID_COMMITTISH 04 |
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#define GET_OID_TREE 010 |
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#define GET_OID_TREEISH 020 |
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#define GET_OID_BLOB 040 |
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#define GET_OID_FOLLOW_SYMLINKS 0100 |
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#define GET_OID_RECORD_PATH 0200 |
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#define GET_OID_ONLY_TO_DIE 04000 |
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#define GET_OID_REQUIRE_PATH 010000 |
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#define GET_OID_DISAMBIGUATORS \ |
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(GET_OID_COMMIT | GET_OID_COMMITTISH | \ |
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GET_OID_TREE | GET_OID_TREEISH | \ |
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GET_OID_BLOB) |
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enum get_oid_result { |
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FOUND = 0, |
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MISSING_OBJECT = -1, /* The requested object is missing */ |
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SHORT_NAME_AMBIGUOUS = -2, |
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/* The following only apply when symlinks are followed */ |
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DANGLING_SYMLINK = -4, /* |
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* The initial symlink is there, but |
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* (transitively) points to a missing |
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* in-tree file |
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*/ |
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SYMLINK_LOOP = -5, |
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NOT_DIR = -6, /* |
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* Somewhere along the symlink chain, a path is |
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* requested which contains a file as a |
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* non-final element. |
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*/ |
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}; |
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/* A suitably aligned type for stack allocations of hash contexts. */ |
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union git_hash_ctx { |
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git_SHA_CTX sha1; |
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git_SHA256_CTX sha256; |
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}; |
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typedef union git_hash_ctx git_hash_ctx; |
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typedef void (*git_hash_init_fn)(git_hash_ctx *ctx); |
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typedef void (*git_hash_clone_fn)(git_hash_ctx *dst, const git_hash_ctx *src); |
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typedef void (*git_hash_update_fn)(git_hash_ctx *ctx, const void *in, size_t len); |
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typedef void (*git_hash_final_fn)(unsigned char *hash, git_hash_ctx *ctx); |
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typedef void (*git_hash_final_oid_fn)(struct object_id *oid, git_hash_ctx *ctx); |
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struct git_hash_algo { |
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/* |
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* The name of the algorithm, as appears in the config file and in |
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* messages. |
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*/ |
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const char *name; |
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/* A four-byte version identifier, used in pack indices. */ |
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uint32_t format_id; |
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/* The length of the hash in binary. */ |
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size_t rawsz; |
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/* The length of the hash in hex characters. */ |
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size_t hexsz; |
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/* The block size of the hash. */ |
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size_t blksz; |
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/* The hash initialization function. */ |
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git_hash_init_fn init_fn; |
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/* The hash context cloning function. */ |
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git_hash_clone_fn clone_fn; |
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/* The hash update function. */ |
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git_hash_update_fn update_fn; |
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/* The hash finalization function. */ |
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git_hash_final_fn final_fn; |
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/* The hash finalization function for object IDs. */ |
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git_hash_final_oid_fn final_oid_fn; |
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/* The OID of the empty tree. */ |
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const struct object_id *empty_tree; |
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/* The OID of the empty blob. */ |
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const struct object_id *empty_blob; |
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/* The all-zeros OID. */ |
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const struct object_id *null_oid; |
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}; |
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extern const struct git_hash_algo hash_algos[GIT_HASH_NALGOS]; |
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/* |
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* Return a GIT_HASH_* constant based on the name. Returns GIT_HASH_UNKNOWN if |
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* the name doesn't match a known algorithm. |
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*/ |
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int hash_algo_by_name(const char *name); |
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/* Identical, except based on the format ID. */ |
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int hash_algo_by_id(uint32_t format_id); |
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/* Identical, except based on the length. */ |
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int hash_algo_by_length(int len); |
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/* Identical, except for a pointer to struct git_hash_algo. */ |
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static inline int hash_algo_by_ptr(const struct git_hash_algo *p) |
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{ |
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return p - hash_algos; |
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} |
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const struct object_id *null_oid(void); |
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static inline int hashcmp_algop(const unsigned char *sha1, const unsigned char *sha2, const struct git_hash_algo *algop) |
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{ |
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/* |
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* Teach the compiler that there are only two possibilities of hash size |
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* here, so that it can optimize for this case as much as possible. |
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*/ |
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if (algop->rawsz == GIT_MAX_RAWSZ) |
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return memcmp(sha1, sha2, GIT_MAX_RAWSZ); |
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return memcmp(sha1, sha2, GIT_SHA1_RAWSZ); |
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} |
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static inline int hasheq_algop(const unsigned char *sha1, const unsigned char *sha2, const struct git_hash_algo *algop) |
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{ |
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/* |
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* We write this here instead of deferring to hashcmp so that the |
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* compiler can properly inline it and avoid calling memcmp. |
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*/ |
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if (algop->rawsz == GIT_MAX_RAWSZ) |
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return !memcmp(sha1, sha2, GIT_MAX_RAWSZ); |
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return !memcmp(sha1, sha2, GIT_SHA1_RAWSZ); |
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} |
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static inline void oidcpy(struct object_id *dst, const struct object_id *src) |
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{ |
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memcpy(dst->hash, src->hash, GIT_MAX_RAWSZ); |
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dst->algo = src->algo; |
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} |
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static inline struct object_id *oiddup(const struct object_id *src) |
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{ |
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struct object_id *dst = xmalloc(sizeof(struct object_id)); |
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oidcpy(dst, src); |
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return dst; |
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} |
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static inline void oid_set_algo(struct object_id *oid, const struct git_hash_algo *algop) |
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{ |
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oid->algo = hash_algo_by_ptr(algop); |
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} |
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const char *empty_tree_oid_hex(void); |
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const char *empty_blob_oid_hex(void); |
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#endif |
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