diff options
Diffstat (limited to 'src/H5Gloc.c')
| -rw-r--r-- | src/H5Gloc.c | 91 |
1 files changed, 89 insertions, 2 deletions
diff --git a/src/H5Gloc.c b/src/H5Gloc.c index 47214a4..6145839 100644 --- a/src/H5Gloc.c +++ b/src/H5Gloc.c @@ -40,6 +40,8 @@ #include "H5Eprivate.h" /* Error handling */ #include "H5Gpkg.h" /* Groups */ #include "H5Iprivate.h" /* IDs */ +#include "H5Lprivate.h" /* Links */ + /****************/ /* Local Macros */ @@ -56,6 +58,12 @@ typedef struct { H5G_loc_t *loc; /* Group location to set */ } H5G_loc_fnd_t; +/* User data for checking if an object exists */ +typedef struct { + /* upward */ + hbool_t exists; /* Whether the object exists */ +} H5G_loc_exists_t; + /* User data for looking up an object in a group by index */ typedef struct { /* downward */ @@ -493,8 +501,9 @@ H5G_loc_find_by_idx_cb(H5G_loc_t UNUSED *grp_loc/*in*/, const char UNUSED *name, H5G_loc_fbi_t *udata = (H5G_loc_fbi_t *)_udata; /* User data passed in */ H5O_link_t fnd_lnk; /* Link within group */ hbool_t lnk_copied = FALSE; /* Whether the link was copied */ - size_t links_left = 1; /* # of links left to traverse (somewhat bogus... :-/ ) */ + size_t links_left = H5L_NUM_LINKS; /* # of links left to traverse */ hbool_t obj_loc_valid = FALSE; /* Flag to indicate that the object location is valid */ + hbool_t obj_exists = FALSE; /* Whether the object exists (unused) */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5G_loc_find_by_idx_cb) @@ -517,7 +526,7 @@ H5G_loc_find_by_idx_cb(H5G_loc_t UNUSED *grp_loc/*in*/, const char UNUSED *name, /* Perform any special traversals that the link needs */ /* (soft links, user-defined links, file mounting, etc.) */ /* (may modify the object location) */ - if(H5G_traverse_special(obj_loc, &fnd_lnk, H5G_TARGET_NORMAL, &links_left, TRUE, udata->loc, udata->lapl_id, udata->dxpl_id) < 0) + if(H5G_traverse_special(obj_loc, &fnd_lnk, H5G_TARGET_NORMAL, &links_left, TRUE, udata->loc, &obj_exists, udata->lapl_id, udata->dxpl_id) < 0) HGOTO_ERROR(H5E_LINK, H5E_TRAVERSE, FAIL, "special link traversal failed") done: @@ -631,6 +640,84 @@ done: /*------------------------------------------------------------------------- + * Function: H5G_loc_exists_cb + * + * Purpose: Callback for checking if an object exists + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * Tuesday, February 2, 2010 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5G_loc_exists_cb(H5G_loc_t UNUSED *grp_loc/*in*/, const char UNUSED *name, + const H5O_link_t UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/, + H5G_own_loc_t *own_loc/*out*/) +{ + H5G_loc_exists_t *udata = (H5G_loc_exists_t *)_udata; /* User data passed in */ + + FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_loc_exists_cb) + + /* Check if the name in this group resolved to a valid object */ + if(obj_loc == NULL) + if(lnk) + udata->exists = FALSE; + else + udata->exists = FAIL; + else + udata->exists = TRUE; + + /* Indicate that this callback didn't take ownership of the group * + * location for the object */ + *own_loc = H5G_OWN_NONE; + + FUNC_LEAVE_NOAPI(SUCCEED) +} /* end H5G_loc_exists_cb() */ + + +/*------------------------------------------------------------------------- + * Function: H5G_loc_exists + * + * Purpose: Check if an object actually exists at a location + * + * Return: Success: TRUE/FALSE + * Failure: Negative + * + * Programmer: Quincey Koziol + * Tuesday, February 2, 2010 + * + *------------------------------------------------------------------------- + */ +htri_t +H5G_loc_exists(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id) +{ + H5G_loc_exists_t udata; /* User data for traversal callback */ + htri_t ret_value; /* Return value */ + + FUNC_ENTER_NOAPI(H5G_loc_exists, FAIL) + + /* Check args. */ + HDassert(loc); + HDassert(name && *name); + + /* Set up user data for locating object */ + udata.exists = FALSE; + + /* Traverse group hierarchy to locate object */ + if(H5G_traverse(loc, name, H5G_TARGET_EXISTS, H5G_loc_exists_cb, &udata, lapl_id, dxpl_id) < 0) + HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't check if object exists") + + /* Set return value */ + ret_value = (htri_t)udata.exists; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5G_loc_exists() */ + + +/*------------------------------------------------------------------------- * Function: H5G_loc_info_cb * * Purpose: Callback for retrieving object info for an object in a group |