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object: factor out parse_mode out of fast-import and tree-walk into in object.h

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builtin/fast-import.c and tree-walk.c have almost identical version of
get_mode.  The two functions started out the same but have diverged
slightly.  The version in fast-import changed mode to a uint16_t to
save memory.  The version in tree-walk started erroring if no mode was
present.

As far as I can tell both of these changes are valid for both of the
callers, so add the both changes and place the common parsing helper
in object.h

Rename the helper from get_mode to parse_mode so it does not
conflict with another helper named get_mode in diff-no-index.c

This will be used shortly in a new helper decode_tree_entry_raw
which is used to compute cmpatibility objects as part of
the sha256 transition.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric W. Biederman
2023-10-01 21:40:18 -05:00
committed by Junio C Hamano
parent 095261a18d
commit 45b3b12141
3 changed files with 23 additions and 35 deletions
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18
object.h
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@ -190,6 +190,24 @@ void *create_object(struct repository *r, const struct object_id *oid, void *obj
void *object_as_type(struct object *obj, enum object_type type, int quiet);
static inline const char *parse_mode(const char *str, uint16_t *modep)
{
unsigned char c;
unsigned int mode = 0;
if (*str == ' ')
return NULL;
while ((c = *str++) != ' ') {
if (c < '0' || c > '7')
return NULL;
mode = (mode << 3) + (c - '0');
}
*modep = mode;
return str;
}
/*
* Returns the object, having parsed it to find out what it is.
*