On Wed, Oct 12, 2016 at 8:47 PM, <tboegi@xxxxxx> wrote:
> From: Torsten Bögershausen <tboegi@xxxxxx>
>
> Factor out the retrieval of the sha1 for a given path in
> read_blob_data_from_index() into the function get_sha1_from_index().
>
> This will be used in the next commit, when convert.c can do the
> analyze for "text=auto" without slurping the whole blob into memory
> at once.
>
> Add a wrapper definition get_sha1_from_cache().
>
> Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
> ---
> cache.h | 3 +++
> read-cache.c | 29 ++++++++++++++++++-----------
> 2 files changed, 21 insertions(+), 11 deletions(-)
>
> diff --git a/cache.h b/cache.h
> index 1604e29..04de209 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -380,6 +380,7 @@ extern void free_name_hash(struct index_state *istate);
> #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
> #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
> #define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
> +#define get_sha1_from_cache(path) get_sha1_from_index (&the_index, (path))
> #endif
>
> enum object_type {
> @@ -1089,6 +1090,8 @@ static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *
> return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
> }
>
> +const unsigned char *get_sha1_from_index(struct index_state *istate, const char *path);
> +
> /*
> * This internal function is only declared here for the benefit of
> * lookup_replace_object(). Please do not call it directly.
> diff --git a/read-cache.c b/read-cache.c
> index 38d67fa..5a1df14 100644
> --- a/read-cache.c
> +++ b/read-cache.c
> @@ -2290,13 +2290,27 @@ int index_name_is_other(const struct index_state *istate, const char *name,
>
> void *read_blob_data_from_index(struct index_state *istate, const char *path, unsigned long *size)
> {
> - int pos, len;
> + const unsigned char *sha1;
> unsigned long sz;
> enum object_type type;
> void *data;
>
> - len = strlen(path);
> - pos = index_name_pos(istate, path, len);
> + sha1 = get_sha1_from_index(istate, path);
> + if (!sha1)
> + return NULL;
> + data = read_sha1_file(sha1, &type, &sz);
> + if (!data || type != OBJ_BLOB) {
> + free(data);
> + return NULL;
> + }
> + if (size)
> + *size = sz;
> + return data;
> +}
> +
> +const unsigned char *get_sha1_from_index(struct index_state *istate, const char *path)
Let's try to embrace struct object_id to make our lives easier when
the time comes to convert to a new hash algorithm by returning struct
object_id * here instead of the internal hash.
> +{
> + int pos = index_name_pos(istate, path, strlen(path));
> if (pos < 0) {
> /*
> * We might be in the middle of a merge, in which
> @@ -2312,14 +2326,7 @@ void *read_blob_data_from_index(struct index_state *istate, const char *path, un
> }
> if (pos < 0)
> return NULL;
> - data = read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz);
> - if (!data || type != OBJ_BLOB) {
> - free(data);
> - return NULL;
> - }
> - if (size)
> - *size = sz;
> - return data;
> + return istate->cache[pos]->oid.hash;
> }
>
> void stat_validity_clear(struct stat_validity *sv)
--
Duy