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astobj2: Create case-insensitive variants of container function macros.

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* AO2_STRING_FIELD_CASE_HASH_FN
* AO2_STRING_FIELD_CASE_CMP_FN
* AO2_STRING_FIELD_CASE_SORT_FN

Change-Id: I11af8c6a0c43380a42732553f519c667abb842cf
This commit is contained in:
Corey Farrell
2017-12-29 23:03:52 -05:00
parent b47882df72
commit b275b0a84f
1 changed files with 66 additions and 38 deletions
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104
include/asterisk/astobj2.h
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@@ -2027,14 +2027,16 @@ void ao2_iterator_cleanup(struct ao2_iterator *iter);
int ao2_iterator_count(struct ao2_iterator *iter);
/*!
* \brief Creates a hash function for a structure string field.
* \brief Creates a hash function for a structure field.
* \param stype The structure type
* \param field The string field in the structure to hash
* \param hash_fn Function which hashes the field
*
* AO2_STRING_FIELD_HASH_CB(mystruct, myfield) will produce a function
* named mystruct_hash_fn which hashes mystruct->myfield.
* AO2_FIELD_HASH_FN(mystruct, myfield, ast_str_hash) will
* produce a function named mystruct_hash_fn which hashes
* mystruct->myfield with ast_str_hash.
*/
#define AO2_STRING_FIELD_HASH_FN(stype, field) \
#define AO2_FIELD_HASH_FN(stype, field, hash_fn) \
static int stype ## _hash_fn(const void *obj, const int flags) \
{ \
const struct stype *object = obj; \
@@ -2050,19 +2052,33 @@ static int stype ## _hash_fn(const void *obj, const int flags) \
ast_assert(0); \
return 0; \
} \
return ast_str_hash(key); \
return hash_fn(key); \
}
#define AO2_FIELD_TRANSFORM_CMP_FN(cmp) ((cmp) ? 0 : CMP_MATCH)
#define AO2_FIELD_TRANSFORM_SORT_FN(cmp) (cmp)
/*!
* \internal
*
* \brief Creates a compare function for a structure string field.
* \param stype The structure type
* \param fn_suffix Function name suffix
* \param field The string field in the structure to compare
* \param key_cmp Key comparison function like strcmp
* \param partial_key_cmp Partial key comparison function like strncmp
* \param transform A macro that takes the cmp result as an argument
* and transforms it to a return value.
*
* AO2_STRING_FIELD_CMP_FN(mystruct, myfield) will produce a function
* named mystruct_cmp_fn which compares mystruct->myfield.
* Do not use this macro directly, instead use macro's starting with
* AST_STRING_FIELD.
*
* \warning The macro is an internal implementation detail, the API
* may change at any time.
*/
#define AO2_STRING_FIELD_CMP_FN(stype, field) \
static int stype ## _cmp_fn(void *obj, void *arg, int flags) \
#define AO2_FIELD_CMP_FN(stype, fn_suffix, field, key_cmp, partial_key_cmp, transform, argconst) \
static int stype ## fn_suffix(argconst void *obj, argconst void *arg, int flags) \
{ \
const struct stype *object_left = obj, *object_right = arg; \
const char *right_key = arg; \
@@ -2071,21 +2087,50 @@ static int stype ## _cmp_fn(void *obj, void *arg, int flags) \
case OBJ_SEARCH_OBJECT: \
right_key = object_right->field; \
case OBJ_SEARCH_KEY: \
cmp = strcmp(object_left->field, right_key); \
cmp = key_cmp(object_left->field, right_key); \
break; \
case OBJ_SEARCH_PARTIAL_KEY: \
cmp = strncmp(object_left->field, right_key, strlen(right_key)); \
cmp = partial_key_cmp(object_left->field, right_key, strlen(right_key)); \
break; \
default: \
cmp = 0; \
break; \
} \
if (cmp) { \
return 0; \
} \
return CMP_MATCH; \
return transform(cmp); \
}
/*!
* \brief Creates a hash function for a structure string field.
* \param stype The structure type
* \param field The string field in the structure to hash
*
* AO2_STRING_FIELD_HASH_FN(mystruct, myfield) will produce a function
* named mystruct_hash_fn which hashes mystruct->myfield.
*
* AO2_STRING_FIELD_HASH_FN(mystruct, myfield) would do the same except
* it uses the hash function which ignores case.
*/
#define AO2_STRING_FIELD_HASH_FN(stype, field) \
AO2_FIELD_HASH_FN(stype, field, ast_str_hash)
#define AO2_STRING_FIELD_CASE_HASH_FN(stype, field) \
AO2_FIELD_HASH_FN(stype, field, ast_str_case_hash)
/*!
* \brief Creates a compare function for a structure string field.
* \param stype The structure type
* \param field The string field in the structure to compare
*
* AO2_STRING_FIELD_CMP_FN(mystruct, myfield) will produce a function
* named mystruct_cmp_fn which compares mystruct->myfield.
*
* AO2_STRING_FIELD_CASE_CMP_FN(mystruct, myfield) would do the same
* except it performs case insensitive comparisons.
*/
#define AO2_STRING_FIELD_CMP_FN(stype, field) \
AO2_FIELD_CMP_FN(stype, _cmp_fn, field, strcmp, strncmp, AO2_FIELD_TRANSFORM_CMP_FN,)
#define AO2_STRING_FIELD_CASE_CMP_FN(stype, field) \
AO2_FIELD_CMP_FN(stype, _cmp_fn, field, strcasecmp, strncasecmp, AO2_FIELD_TRANSFORM_CMP_FN,)
/*!
* \brief Creates a sort function for a structure string field.
* \param stype The structure type
@@ -2093,30 +2138,13 @@ static int stype ## _cmp_fn(void *obj, void *arg, int flags) \
*
* AO2_STRING_FIELD_SORT_FN(mystruct, myfield) will produce a function
* named mystruct_sort_fn which compares mystruct->myfield.
*
* AO2_STRING_FIELD_CASE_SORT_FN(mystruct, myfield) would do the same
* except it performs case insensitive comparisons.
*/
#define AO2_STRING_FIELD_SORT_FN(stype, field) \
static int stype ## _sort_fn(const void *obj, const void *arg, int flags) \
{ \
const struct stype *object_left = obj; \
const struct stype *object_right = arg; \
const char *right_key = arg; \
int cmp; \
\
switch (flags & OBJ_SEARCH_MASK) { \
case OBJ_SEARCH_OBJECT: \
right_key = object_right->field; \
/* Fall through */ \
case OBJ_SEARCH_KEY: \
cmp = strcmp(object_left->field, right_key); \
break; \
case OBJ_SEARCH_PARTIAL_KEY: \
cmp = strncmp(object_left->field, right_key, strlen(right_key)); \
break; \
default: \
cmp = 0; \
break; \
} \
return cmp; \
}
AO2_FIELD_CMP_FN(stype, _sort_fn, field, strcmp, strncmp, AO2_FIELD_TRANSFORM_SORT_FN, const)
#define AO2_STRING_FIELD_CASE_SORT_FN(stype, field) \
AO2_FIELD_CMP_FN(stype, _sort_fn, field, strcasecmp, strncasecmp, AO2_FIELD_TRANSFORM_SORT_FN, const)
#endif /* _ASTERISK_ASTOBJ2_H */