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Define new hash-size constants for allocating memory

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Since we will want to transition to a new hash at some point in the
future, and that hash may be larger in size than 160 bits, introduce two
constants that can be used for allocating a sufficient amount of memory.
They can be increased to reflect the largest supported hash size.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2017-03-26 16:01:23 +00:00 committed by Junio C Hamano
parent 034667a458
commit 5028bf628c
1 changed files with 5 additions and 1 deletions
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6
cache.h
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@ -66,8 +66,12 @@ unsigned long git_deflate_bound(git_zstream *, unsigned long);
#define GIT_SHA1_RAWSZ 20 #define GIT_SHA1_RAWSZ 20
#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) #define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
/* The length in byte and in hex digits of the largest possible hash value. */
#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ
#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ
struct object_id { struct object_id {
unsigned char hash[GIT_SHA1_RAWSZ]; unsigned char hash[GIT_MAX_RAWSZ];
}; };
#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)