X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Fcore%2Fstore_lookup.c;h=86acd10ea17ccf0a05ca7a7d1faeda5b09c52446;hb=3497f3e7bfedaa643aa89763a650dc581d8d07a2;hp=26e466617dc29244da13a770dcc465554b5b68fd;hpb=5e371c0cd627b5628453813c180fa8d08a523af8;p=sysdb.git diff --git a/src/core/store_lookup.c b/src/core/store_lookup.c index 26e4666..86acd10 100644 --- a/src/core/store_lookup.c +++ b/src/core/store_lookup.c @@ -31,279 +31,1078 @@ * simple full table scan is supported only. */ +#if HAVE_CONFIG_H +# include "config.h" +#endif /* HAVE_CONFIG_H */ + #include "sysdb.h" #include "core/store-private.h" +#include "core/object.h" #include #include #include +#include #include +#include + /* * private data types */ -/* match the name of something */ typedef struct { - const char *name; - regex_t *name_re; -} name_matcher_t; + sdb_store_matcher_t *m; + sdb_store_matcher_t *filter; + sdb_store_lookup_cb cb; + void *user_data; +} scan_iter_data_t; -/* matcher base type */ -typedef struct { - /* type of the matcher */ - int type; -} matcher_t; -#define M(m) ((matcher_t *)(m)) +/* + * private helper functions + */ -/* logical operator matcher */ -typedef struct { - matcher_t super; +static int +scan_iter(sdb_store_obj_t *obj, void *user_data) +{ + scan_iter_data_t *d = user_data; - /* left and right hand operands */ - matcher_t *left; - matcher_t *right; -} op_matcher_t; -#define OP_M(m) ((op_matcher_t *)(m)) + if (sdb_store_matcher_matches(d->m, obj, d->filter)) + return d->cb(obj, d->user_data); + return 0; +} /* scan_iter */ -/* match any type of object by it's base information */ -typedef struct { - matcher_t super; +static sdb_attribute_t * +attr_get(sdb_host_t *host, const char *name, sdb_store_matcher_t *filter) +{ + sdb_avltree_iter_t *iter = NULL; + sdb_attribute_t *attr = NULL; - /* match by the name of the object */ - name_matcher_t name; -} obj_matcher_t; -#define OBJ_M(m) ((obj_matcher_t *)(m)) + iter = sdb_avltree_get_iter(host->attributes); + while (sdb_avltree_iter_has_next(iter)) { + sdb_attribute_t *a = ATTR(sdb_avltree_iter_get_next(iter)); -/* match attributes */ -typedef struct { - obj_matcher_t super; - /* XXX: this needs to be more flexible; - * add support for type-specific operators */ - name_matcher_t value; -} attr_matcher_t; -#define ATTR_M(m) ((attr_matcher_t *)(m)) - -/* match services */ -typedef struct { - obj_matcher_t super; - /* match by attributes assigned to the service */ - attr_matcher_t *attr; -} service_matcher_t; -#define SERVICE_M(m) ((service_matcher_t *)(m)) + if (strcasecmp(name, SDB_OBJ(a)->name)) + continue; -/* match hosts */ -typedef struct { - obj_matcher_t super; - /* match by services assigned to the host */ - service_matcher_t *service; - /* match by attributes assigned to the host */ - attr_matcher_t *attr; -} host_matcher_t; -#define HOST_M(m) ((host_matcher_t *)(m)) + assert(STORE_OBJ(a)->type == SDB_ATTRIBUTE); + attr = a; + break; + } + sdb_avltree_iter_destroy(iter); + + if (filter && (! sdb_store_matcher_matches(filter, STORE_OBJ(attr), + NULL))) + return NULL; + return attr; +} /* attr_get */ /* - * matcher implementations + * conditional implementations */ static int -match_logical(matcher_t *m, sdb_store_base_t *obj); -static int -match_obj(matcher_t *m, sdb_store_base_t *obj); +attr_cmp(sdb_store_obj_t *obj, sdb_store_cond_t *cond, + sdb_store_matcher_t *filter) +{ + sdb_attribute_t *attr; + sdb_data_t value = SDB_DATA_INIT; + int status; -/* specific matchers */ + if (obj->type != SDB_HOST) + return INT_MAX; + + if (sdb_store_expr_eval(ATTR_C(cond)->expr, obj, &value)) + return INT_MAX; + + attr = attr_get(HOST(obj), ATTR_C(cond)->name, filter); + if (! attr) + status = INT_MAX; + else if (attr->value.type != value.type) + status = INT_MAX; + else + status = sdb_data_cmp(&attr->value, &value); + sdb_data_free_datum(&value); + return status; +} /* attr_cmp */ static int -match_name(name_matcher_t *m, const char *name) +obj_cmp(sdb_store_obj_t *obj, sdb_store_cond_t *cond, + sdb_store_matcher_t __attribute__((unused)) *filter) { - assert(m); + sdb_data_t obj_value = SDB_DATA_INIT; + sdb_data_t value = SDB_DATA_INIT; + int status; + + if (sdb_store_get_field(obj, OBJ_C(cond)->field, &obj_value)) + return INT_MAX; + if (sdb_store_expr_eval(OBJ_C(cond)->expr, obj, &value)) + return INT_MAX; + + if (obj_value.type != value.type) { + sdb_data_free_datum(&value); + return INT_MAX; + } + else if (OBJ_C(cond)->field == SDB_FIELD_BACKEND) { + /* this implementation is not actually a conditional but rather checks + * for equality (or rather, existence) only */ + size_t i; + status = INT_MAX; + for (i = 0; i < obj->backends_num; ++i) { + if (! strcasecmp(obj->backends[i], value.data.string)) { + status = 0; + break; + } + } + } + else { + status = sdb_data_cmp(&obj_value, &value); + } + sdb_data_free_datum(&value); + return status; +} /* obj_cmp */ +/* + * matcher implementations + */ + +static int +match_string(string_matcher_t *m, const char *name) +{ if ((! m->name) && (! m->name_re)) - return 0; + return 1; if (! name) name = ""; if (m->name && strcasecmp(m->name, name)) - return -1; + return 0; if (m->name_re && regexec(m->name_re, name, /* matches */ 0, NULL, /* flags = */ 0)) - return -1; - return 0; + return 0; + return 1; +} /* match_string */ + +static int +match_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + int status; + + assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR)); + assert(OP_M(m)->left && OP_M(m)->right); + + status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter); + + /* lazy evaluation */ + if ((! status) && (m->type == MATCHER_AND)) + return status; + else if (status && (m->type == MATCHER_OR)) + return status; + + return sdb_store_matcher_matches(OP_M(m)->right, obj, filter); +} /* match_logical */ + +static int +match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + assert(m->type == MATCHER_NOT); + assert(UOP_M(m)->op); + + return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter); +} /* match_unary */ + +static int +match_name(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + sdb_avltree_iter_t *iter = NULL; + int status = 0; + + assert(m->type == MATCHER_NAME); + + if (obj->type == NAME_M(m)->obj_type) + return match_string(&NAME_M(m)->name, SDB_OBJ(obj)->name); + else if (obj->type != SDB_HOST) + return 0; + + switch (NAME_M(m)->obj_type) { + case SDB_SERVICE: + iter = sdb_avltree_get_iter(HOST(obj)->services); + break; + case SDB_METRIC: + iter = sdb_avltree_get_iter(HOST(obj)->metrics); + break; + case SDB_ATTRIBUTE: + iter = sdb_avltree_get_iter(HOST(obj)->attributes); + break; + } + + while (sdb_avltree_iter_has_next(iter)) { + sdb_object_t *child = sdb_avltree_iter_get_next(iter); + if (filter && (! sdb_store_matcher_matches(filter, STORE_OBJ(child), + NULL))) + continue; + if (match_string(&NAME_M(m)->name, child->name)) { + status = 1; + break; + } + } + sdb_avltree_iter_destroy(iter); + return status; } /* match_name */ -/* match attribute specific values; - * always call this function through match_obj() */ static int -match_attr(attr_matcher_t *m, sdb_store_base_t *obj) +match_attr(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) { - assert(m && obj); + sdb_attribute_t *attr; - if (obj->type != SDB_ATTRIBUTE) - return -1; + assert(m->type == MATCHER_ATTR); + assert(ATTR_M(m)->name); - { - sdb_attribute_t *attr = SDB_ATTR(obj); - char buf[sdb_data_strlen(&attr->value) + 1]; + if (obj->type != SDB_HOST) + return 0; + attr = attr_get(HOST(obj), ATTR_M(m)->name, filter); + if (attr) { + char buf[sdb_data_strlen(&attr->value) + 1]; if (sdb_data_format(&attr->value, buf, sizeof(buf), SDB_UNQUOTED) <= 0) - return -1; - return match_name(&m->value, buf); + return 0; + if (match_string(&ATTR_M(m)->value, buf)) + return 1; } + return 0; } /* match_attr */ -/* match service specific values; - * always call this function through match_obj() */ static int -match_service(service_matcher_t *m, sdb_store_base_t *obj) +match_lt(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + int status; + assert(m->type == MATCHER_LT); + status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter); + return (status != INT_MAX) && (status < 0); +} /* match_lt */ + +static int +match_le(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + int status; + assert(m->type == MATCHER_LE); + status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter); + return (status != INT_MAX) && (status <= 0); +} /* match_le */ + +static int +match_eq(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + int status; + assert(m->type == MATCHER_EQ); + status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter); + return (status != INT_MAX) && (! status); +} /* match_eq */ + +static int +match_ge(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + int status; + assert(m->type == MATCHER_GE); + status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter); + return (status != INT_MAX) && (status >= 0); +} /* match_ge */ + +static int +match_gt(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + int status; + assert(m->type == MATCHER_GT); + status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter); + return (status != INT_MAX) && (status > 0); +} /* match_gt */ + +static int +match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) { - sdb_llist_iter_t *iter; + assert(m->type == MATCHER_ISNULL); + if (obj->type != SDB_HOST) + return 0; + return attr_get(HOST(obj), ISNULL_M(m)->attr_name, filter) == NULL; +} /* match_isnull */ + +typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *, + sdb_store_matcher_t *); - assert(m && obj); +/* this array needs to be indexable by the matcher types; + * -> update the enum in store-private.h when updating this */ +static matcher_cb +matchers[] = { + match_logical, + match_logical, + match_unary, + match_name, + match_attr, + match_lt, + match_le, + match_eq, + match_ge, + match_gt, + match_isnull, +}; - if (obj->type != SDB_SERVICE) +/* + * private conditional types + */ + +static int +attr_cond_init(sdb_object_t *obj, va_list ap) +{ + const char *name = va_arg(ap, const char *); + sdb_store_expr_t *expr = va_arg(ap, sdb_store_expr_t *); + + if (! name) return -1; - iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->attributes); - while (sdb_llist_iter_has_next(iter)) { - sdb_store_base_t *attr = STORE_BASE(sdb_llist_iter_get_next(iter)); + SDB_STORE_COND(obj)->cmp = attr_cmp; - /* if any of the attributes matches we found a matching service */ - if (! match_obj(M(m->attr), attr)) { - sdb_llist_iter_destroy(iter); - return 0; - } + ATTR_C(obj)->name = strdup(name); + if (! ATTR_C(obj)->name) + return -1; + ATTR_C(obj)->expr = expr; + sdb_object_ref(SDB_OBJ(expr)); + return 0; +} /* attr_cond_init */ + +static void +attr_cond_destroy(sdb_object_t *obj) +{ + if (ATTR_C(obj)->name) + free(ATTR_C(obj)->name); + sdb_object_deref(SDB_OBJ(ATTR_C(obj)->expr)); +} /* attr_cond_destroy */ + +static sdb_type_t attr_cond_type = { + /* size = */ sizeof(attr_cond_t), + /* init = */ attr_cond_init, + /* destroy = */ attr_cond_destroy, +}; + +static int +obj_cond_init(sdb_object_t *obj, va_list ap) +{ + int field = va_arg(ap, int); + sdb_store_expr_t *expr = va_arg(ap, sdb_store_expr_t *); + + SDB_STORE_COND(obj)->cmp = obj_cmp; + + OBJ_C(obj)->field = field; + OBJ_C(obj)->expr = expr; + sdb_object_ref(SDB_OBJ(expr)); + return 0; +} /* obj_cond_init */ + +static void +obj_cond_destroy(sdb_object_t *obj) +{ + sdb_object_deref(SDB_OBJ(OBJ_C(obj)->expr)); +} /* obj_cond_destroy */ + +static sdb_type_t obj_cond_type = { + /* size = */ sizeof(obj_cond_t), + /* init = */ obj_cond_init, + /* destroy = */ obj_cond_destroy, +}; + +/* + * private matcher types + */ + +/* initializes a string matcher consuming two elements from ap */ +static int +string_matcher_init(string_matcher_t *m, va_list ap) +{ + const char *name = va_arg(ap, const char *); + const char *name_re = va_arg(ap, const char *); + + if (name) { + m->name = strdup(name); + if (! m->name) + return -1; } - sdb_llist_iter_destroy(iter); - return -1; -} /* match_service */ + if (name_re) { + m->name_re = malloc(sizeof(*m->name_re)); + if (! m->name_re) + return -1; + if (regcomp(m->name_re, name_re, REG_EXTENDED | REG_ICASE | REG_NOSUB)) + return -1; + } + return 0; +} /* string_matcher_init */ + +static void +string_matcher_destroy(string_matcher_t *m) +{ + if (m->name) + free(m->name); + if (m->name_re) { + regfree(m->name_re); + free(m->name_re); + } +} /* string_matcher_destroy */ -/* match host specific values; - * always call this function through match_obj() */ +static char * +string_tostring(string_matcher_t *m, char *buf, size_t buflen) +{ + snprintf(buf, buflen, "{ %s%s%s, %p }", + m->name ? "'" : "", m->name ? m->name : "NULL", m->name ? "'" : "", + m->name_re); + return buf; +} /* string_tostring */ + +/* initializes a name matcher */ static int -match_host(host_matcher_t *m, sdb_store_base_t *obj) +name_matcher_init(sdb_object_t *obj, va_list ap) { - sdb_llist_iter_t *iter; - int status; + name_matcher_t *m = NAME_M(obj); + M(obj)->type = MATCHER_NAME; + return string_matcher_init(&m->name, ap); +} /* name_matcher_init */ - assert(m && obj); +static void +name_matcher_destroy(sdb_object_t *obj) +{ + name_matcher_t *m = NAME_M(obj); + string_matcher_destroy(&m->name); +} /* name_matcher_destroy */ - if (obj->type != SDB_HOST) +static char * +name_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen) +{ + char name[buflen + 1]; + assert(m->type == MATCHER_NAME); + snprintf(buf, buflen, "OBJ[%s]{ NAME%s }", + SDB_STORE_TYPE_TO_NAME(NAME_M(m)->obj_type), + string_tostring(&NAME_M(m)->name, name, sizeof(name))); + return buf; +} /* name_tostring */ + +static int +attr_matcher_init(sdb_object_t *obj, va_list ap) +{ + attr_matcher_t *attr = ATTR_M(obj); + const char *name = va_arg(ap, const char *); + + M(obj)->type = MATCHER_ATTR; + if (name) { + attr->name = strdup(name); + if (! attr->name) + return -1; + } + return string_matcher_init(&attr->value, ap); +} /* attr_matcher_init */ + +static void +attr_matcher_destroy(sdb_object_t *obj) +{ + attr_matcher_t *attr = ATTR_M(obj); + if (attr->name) + free(attr->name); + attr->name = NULL; + string_matcher_destroy(&attr->value); +} /* attr_matcher_destroy */ + +static char * +attr_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen) +{ + char value[buflen + 1]; + + if (! m) { + snprintf(buf, buflen, "ATTR{}"); + return buf; + } + + assert(m->type == MATCHER_ATTR); + snprintf(buf, buflen, "ATTR[%s]{ VALUE%s }", ATTR_M(m)->name, + string_tostring(&ATTR_M(m)->value, value, sizeof(value))); + return buf; +} /* attr_tostring */ + +static int +cond_matcher_init(sdb_object_t *obj, va_list ap) +{ + int type = va_arg(ap, int); + sdb_store_cond_t *cond = va_arg(ap, sdb_store_cond_t *); + + if (! cond) return -1; - if (m->service) { - iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->children); - status = -1; + sdb_object_ref(SDB_OBJ(cond)); + + M(obj)->type = type; + COND_M(obj)->cond = cond; + return 0; +} /* cond_matcher_init */ + +static void +cond_matcher_destroy(sdb_object_t *obj) +{ + sdb_object_deref(SDB_OBJ(COND_M(obj)->cond)); +} /* cond_matcher_destroy */ + +static char * +cond_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen) +{ + const char *type, *id; + sdb_data_t value = SDB_DATA_INIT; + char value_str[buflen]; + sdb_store_expr_t *expr; + + if (COND_M(m)->cond->cmp == attr_cmp) { + type = "ATTR"; + id = ATTR_C(COND_M(m)->cond)->name; + expr = ATTR_C(COND_M(m)->cond)->expr; + } + else if (COND_M(m)->cond->cmp == obj_cmp) { + type = "OBJ"; + id = SDB_FIELD_TO_NAME(OBJ_C(COND_M(m)->cond)->field); + expr = OBJ_C(COND_M(m)->cond)->expr; } else { - iter = NULL; - status = 0; + snprintf(buf, buflen, ""); + return buf; } - while (sdb_llist_iter_has_next(iter)) { - sdb_store_base_t *service = STORE_BASE(sdb_llist_iter_get_next(iter)); - /* found a matching service */ - if (! match_obj(M(m->service), service)) { - status = 0; - break; - } + if (sdb_store_expr_eval(expr, NULL, &value)) + snprintf(value_str, sizeof(value_str), "ERR"); + else if (sdb_data_format(&value, value_str, sizeof(value_str), + SDB_SINGLE_QUOTED) < 0) + snprintf(value_str, sizeof(value_str), "ERR"); + snprintf(buf, buflen, "%s[%s]{ %s %s }", type, id, + MATCHER_SYM(m->type), value_str); + sdb_data_free_datum(&value); + return buf; +} /* cond_tostring */ + +static int +op_matcher_init(sdb_object_t *obj, va_list ap) +{ + M(obj)->type = va_arg(ap, int); + if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND)) + return -1; + + OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *); + sdb_object_ref(SDB_OBJ(OP_M(obj)->left)); + OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *); + sdb_object_ref(SDB_OBJ(OP_M(obj)->right)); + + if ((! OP_M(obj)->left) || (! OP_M(obj)->right)) + return -1; + return 0; +} /* op_matcher_init */ + +static void +op_matcher_destroy(sdb_object_t *obj) +{ + if (OP_M(obj)->left) + sdb_object_deref(SDB_OBJ(OP_M(obj)->left)); + if (OP_M(obj)->right) + sdb_object_deref(SDB_OBJ(OP_M(obj)->right)); +} /* op_matcher_destroy */ + +static char * +op_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen) +{ + char left[buflen + 1], right[buflen + 1]; + + if (! m) { + /* this should not happen */ + snprintf(buf, buflen, "()"); + return buf; } - sdb_llist_iter_destroy(iter); - if (status) - return status; - else if (! m->attr) - return 0; + assert((m->type == MATCHER_OR) || (m->type == MATCHER_AND)); + snprintf(buf, buflen, "(%s, %s, %s)", + m->type == MATCHER_OR ? "OR" : "AND", + sdb_store_matcher_tostring(OP_M(m)->left, left, sizeof(left)), + sdb_store_matcher_tostring(OP_M(m)->right, right, sizeof(right))); + return buf; +} /* op_tostring */ - iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->attributes); - while (sdb_llist_iter_has_next(iter)) { - sdb_store_base_t *attr = STORE_BASE(sdb_llist_iter_get_next(iter)); +static int +uop_matcher_init(sdb_object_t *obj, va_list ap) +{ + M(obj)->type = va_arg(ap, int); + if (M(obj)->type != MATCHER_NOT) + return -1; - /* if any attribute matches, we found a matching host */ - if (! match_obj(M(m->attr), attr)) { - sdb_llist_iter_destroy(iter); - return 0; - } + UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *); + sdb_object_ref(SDB_OBJ(UOP_M(obj)->op)); + + if (! UOP_M(obj)->op) + return -1; + return 0; +} /* uop_matcher_init */ + +static void +uop_matcher_destroy(sdb_object_t *obj) +{ + if (UOP_M(obj)->op) + sdb_object_deref(SDB_OBJ(UOP_M(obj)->op)); +} /* uop_matcher_destroy */ + +static char * +uop_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen) +{ + char op[buflen + 1]; + + if (! m) { + /* this should not happen */ + snprintf(buf, buflen, "()"); + return buf; } - sdb_llist_iter_destroy(iter); - return -1; -} /* match_host */ -/* generic matchers */ + assert(m->type == MATCHER_NOT); + snprintf(buf, buflen, "(NOT, %s)", + sdb_store_matcher_tostring(UOP_M(m)->op, op, sizeof(op))); + return buf; +} /* uop_tostring */ + +static int +isnull_matcher_init(sdb_object_t *obj, va_list ap) +{ + const char *name; + + M(obj)->type = va_arg(ap, int); + if (M(obj)->type != MATCHER_ISNULL) + return -1; -enum { - MATCHER_OR, - MATCHER_AND, - MATCHER_ATTR, - MATCHER_SERVICE, - MATCHER_HOST, + name = va_arg(ap, const char *); + if (! name) + return -1; + ISNULL_M(obj)->attr_name = strdup(name); + if (! ISNULL_M(obj)->attr_name) + return -1; + return 0; +} /* isnull_matcher_init */ + +static void +isnull_matcher_destroy(sdb_object_t *obj) +{ + if (ISNULL_M(obj)->attr_name) + free(ISNULL_M(obj)->attr_name); + ISNULL_M(obj)->attr_name = NULL; +} /* isnull_matcher_destroy */ + +static char * +isnull_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen) +{ + snprintf(buf, buflen, "(IS NULL, ATTR[%s])", ISNULL_M(m)->attr_name); + return buf; +} /* isnull_tostring */ + +static sdb_type_t name_type = { + /* size = */ sizeof(name_matcher_t), + /* init = */ name_matcher_init, + /* destroy = */ name_matcher_destroy, }; -typedef int (*matcher_cb)(matcher_t *, sdb_store_base_t *); +static sdb_type_t attr_type = { + /* size = */ sizeof(attr_matcher_t), + /* init = */ attr_matcher_init, + /* destroy = */ attr_matcher_destroy, +}; -/* this array needs to be indexable by the matcher types */ -static matcher_cb matchers[] = { - match_logical, - match_logical, - match_obj, - match_obj, - match_obj, +static sdb_type_t cond_type = { + /* size = */ sizeof(cond_matcher_t), + /* init = */ cond_matcher_init, + /* destroy = */ cond_matcher_destroy, }; -static int -match(matcher_t *m, sdb_store_base_t *obj) +static sdb_type_t op_type = { + /* size = */ sizeof(op_matcher_t), + /* init = */ op_matcher_init, + /* destroy = */ op_matcher_destroy, +}; + +static sdb_type_t uop_type = { + /* size = */ sizeof(uop_matcher_t), + /* init = */ uop_matcher_init, + /* destroy = */ uop_matcher_destroy, +}; + +static sdb_type_t isnull_type = { + /* size = */ sizeof(isnull_matcher_t), + /* init = */ isnull_matcher_init, + /* destroy = */ isnull_matcher_destroy, +}; + +typedef char *(*matcher_tostring_cb)(sdb_store_matcher_t *, char *, size_t); + +/* this array needs to be indexable by the matcher types; + * -> update the enum in store-private.h when updating this */ +static matcher_tostring_cb +matchers_tostring[] = { + op_tostring, + op_tostring, + uop_tostring, + name_tostring, + attr_tostring, + cond_tostring, + cond_tostring, + cond_tostring, + cond_tostring, + cond_tostring, + isnull_tostring, +}; + +/* + * public API + */ + +sdb_store_cond_t * +sdb_store_attr_cond(const char *name, sdb_store_expr_t *expr) { - assert(m && obj); - assert((0 <= m->type) - && ((size_t)m->type < SDB_STATIC_ARRAY_LEN(matchers))); + return SDB_STORE_COND(sdb_object_create("attr-cond", attr_cond_type, + name, expr)); +} /* sdb_store_attr_cond */ - return matchers[m->type](m, obj); -} /* match */ +sdb_store_cond_t * +sdb_store_obj_cond(int field, sdb_store_expr_t *expr) +{ + return SDB_STORE_COND(sdb_object_create("obj-cond", obj_cond_type, + field, expr)); +} /* sdb_store_obj_cond */ -static int -match_logical(matcher_t *m, sdb_store_base_t *obj) +sdb_store_matcher_t * +sdb_store_name_matcher(int type, const char *name, _Bool re) { - int status; + sdb_store_matcher_t *m; - assert(m && obj); - assert(OP_M(m)->left && OP_M(m)->right); + if (re) + m = M(sdb_object_create("name-matcher", name_type, NULL, name)); + else + m = M(sdb_object_create("name-matcher", name_type, name, NULL)); - status = match(OP_M(m)->left, obj); - /* lazy evaluation */ - if (status && (m->type == MATCHER_AND)) - return status; - else if ((! status) && (m->type == MATCHER_OR)) - return status; + if (! m) + return NULL; - return match(OP_M(m)->right, obj); -} /* match_logical */ + NAME_M(m)->obj_type = type; + return m; +} /* sdb_store_name_matcher */ + +sdb_store_matcher_t * +sdb_store_attr_matcher(const char *name, const char *value, _Bool re) +{ + sdb_store_matcher_t *m; + + if (! name) + return NULL; + + if (re) + m = M(sdb_object_create("attr-matcher", attr_type, + name, NULL, value)); + else + m = M(sdb_object_create("attr-matcher", attr_type, + name, value, NULL)); + return m; +} /* sdb_store_attr_matcher */ + +sdb_store_matcher_t * +sdb_store_lt_matcher(sdb_store_cond_t *cond) +{ + return M(sdb_object_create("lt-matcher", cond_type, + MATCHER_LT, cond)); +} /* sdb_store_lt_matcher */ + +sdb_store_matcher_t * +sdb_store_le_matcher(sdb_store_cond_t *cond) +{ + return M(sdb_object_create("le-matcher", cond_type, + MATCHER_LE, cond)); +} /* sdb_store_le_matcher */ + +sdb_store_matcher_t * +sdb_store_eq_matcher(sdb_store_cond_t *cond) +{ + return M(sdb_object_create("eq-matcher", cond_type, + MATCHER_EQ, cond)); +} /* sdb_store_eq_matcher */ + +sdb_store_matcher_t * +sdb_store_ge_matcher(sdb_store_cond_t *cond) +{ + return M(sdb_object_create("ge-matcher", cond_type, + MATCHER_GE, cond)); +} /* sdb_store_ge_matcher */ + +sdb_store_matcher_t * +sdb_store_gt_matcher(sdb_store_cond_t *cond) +{ + return M(sdb_object_create("gt-matcher", cond_type, + MATCHER_GT, cond)); +} /* sdb_store_gt_matcher */ + +sdb_store_matcher_t * +sdb_store_isnull_matcher(const char *attr_name) +{ + return M(sdb_object_create("isnull-matcher", isnull_type, + MATCHER_ISNULL, attr_name)); +} /* sdb_store_isnull_matcher */ + +int +sdb_store_parse_object_type_plural(const char *name) +{ + if (! strcasecmp(name, "hosts")) + return SDB_HOST; + else if (! strcasecmp(name, "services")) + return SDB_SERVICE; + else if (! strcasecmp(name, "metrics")) + return SDB_METRIC; + return -1; +} /* sdb_store_parse_object_type_plural */ + +int +sdb_store_parse_field_name(const char *name) +{ + if (! strcasecmp(name, "last_update")) + return SDB_FIELD_LAST_UPDATE; + else if (! strcasecmp(name, "age")) + return SDB_FIELD_AGE; + else if (! strcasecmp(name, "interval")) + return SDB_FIELD_INTERVAL; + else if (! strcasecmp(name, "backend")) + return SDB_FIELD_BACKEND; + return -1; +} /* sdb_store_parse_field_name */ + +static sdb_store_matcher_t * +maybe_inv_matcher(sdb_store_matcher_t *m, _Bool inv) +{ + sdb_store_matcher_t *tmp; + + if ((! m) || (! inv)) + return m; + + tmp = sdb_store_inv_matcher(m); + /* pass ownership to the inverse matcher */ + sdb_object_deref(SDB_OBJ(m)); + return tmp; +} /* maybe_inv_matcher */ static int -match_obj(matcher_t *m, sdb_store_base_t *obj) +parse_cond_op(const char *op, + sdb_store_matcher_t *(**matcher)(sdb_store_cond_t *), _Bool *inv) { - int status; + *inv = 0; + if (! strcasecmp(op, "<")) + *matcher = sdb_store_lt_matcher; + else if (! strcasecmp(op, "<=")) + *matcher = sdb_store_le_matcher; + else if (! strcasecmp(op, "=")) + *matcher = sdb_store_eq_matcher; + else if (! strcasecmp(op, ">=")) + *matcher = sdb_store_ge_matcher; + else if (! strcasecmp(op, ">")) + *matcher = sdb_store_gt_matcher; + else if (! strcasecmp(op, "!=")) { + *matcher = sdb_store_eq_matcher; + *inv = 1; + } + else + return -1; + return 0; +} /* parse_cond_op */ - assert(m && obj); +static sdb_store_matcher_t * +parse_attr_cmp(const char *attr, const char *op, sdb_store_expr_t *expr) +{ + sdb_store_matcher_t *(*matcher)(sdb_store_cond_t *) = NULL; + sdb_store_matcher_t *m; + sdb_store_cond_t *cond; + _Bool inv = 0; - status = match_name(&OBJ_M(m)->name, obj->super.name); - if (status) - return status; + if (! attr) + return NULL; - switch (m->type) { - case MATCHER_ATTR: - return match_attr(ATTR_M(m), obj); - break; - case MATCHER_SERVICE: - return match_service(SERVICE_M(m), obj); - break; - case MATCHER_HOST: - return match_host(HOST_M(m), obj); - break; + if (! strcasecmp(op, "IS")) { + if (! expr) + return sdb_store_isnull_matcher(attr); + else + return NULL; } - return -1; -} /* match_obj */ + else if (! expr) + return NULL; + else if (parse_cond_op(op, &matcher, &inv)) + return NULL; + + cond = sdb_store_attr_cond(attr, expr); + if (! cond) + return NULL; + + m = matcher(cond); + /* pass ownership to 'm' or destroy in case of an error */ + sdb_object_deref(SDB_OBJ(cond)); + return maybe_inv_matcher(m, inv); +} /* parse_attr_cmp */ + +sdb_store_matcher_t * +sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr, + const char *op, sdb_store_expr_t *expr) +{ + int type = -1; + _Bool inv = 0; + _Bool re = 0; + + sdb_data_t value = SDB_DATA_INIT; + sdb_store_matcher_t *m = NULL; + + if (! strcasecmp(obj_type, "host")) + type = SDB_HOST; + else if (! strcasecmp(obj_type, "service")) + type = SDB_SERVICE; + else if (! strcasecmp(obj_type, "metric")) + type = SDB_METRIC; + else if (! strcasecmp(obj_type, "attribute")) + type = SDB_ATTRIBUTE; + else + return NULL; + + /* XXX: this code sucks! */ + if (! strcasecmp(op, "=")) { + /* nothing to do */ + } + else if (! strcasecmp(op, "!=")) { + inv = 1; + } + else if (! strcasecmp(op, "=~")) { + re = 1; + } + else if (! strcasecmp(op, "!~")) { + inv = 1; + re = 1; + } + else if (type == SDB_ATTRIBUTE) + return parse_attr_cmp(attr, op, expr); + else + return NULL; + + if (! expr) + return NULL; + + if (sdb_store_expr_eval(expr, NULL, &value)) + return NULL; + if (value.type != SDB_TYPE_STRING) { + sdb_data_free_datum(&value); + return parse_attr_cmp(attr, op, expr); + } + + if (! attr) + m = sdb_store_name_matcher(type, value.data.string, re); + else if (type == SDB_ATTRIBUTE) + m = sdb_store_attr_matcher(attr, value.data.string, re); + + sdb_data_free_datum(&value); + return maybe_inv_matcher(m, inv); +} /* sdb_store_matcher_parse_cmp */ + +sdb_store_matcher_t * +sdb_store_matcher_parse_field_cmp(const char *name, const char *op, + sdb_store_expr_t *expr) +{ + sdb_store_matcher_t *(*matcher)(sdb_store_cond_t *) = NULL; + sdb_store_matcher_t *m; + sdb_store_cond_t *cond; + _Bool inv = 0; + + int field; + + if (! expr) + return NULL; + + field = sdb_store_parse_field_name(name); + if (field < 0) + return NULL; + + if (parse_cond_op(op, &matcher, &inv)) + return NULL; + cond = sdb_store_obj_cond(field, expr); + if (! cond) + return NULL; + + assert(matcher); + m = matcher(cond); + /* pass ownership to 'm' or destroy in case of an error */ + sdb_object_deref(SDB_OBJ(cond)); + return maybe_inv_matcher(m, inv); +} /* sdb_store_matcher_parse_field_cmp */ + +sdb_store_matcher_t * +sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right) +{ + return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR, + left, right)); +} /* sdb_store_dis_matcher */ + +sdb_store_matcher_t * +sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right) +{ + return M(sdb_object_create("con-matcher", op_type, MATCHER_AND, + left, right)); +} /* sdb_store_con_matcher */ + +sdb_store_matcher_t * +sdb_store_inv_matcher(sdb_store_matcher_t *m) +{ + return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m)); +} /* sdb_store_inv_matcher */ + +int +sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter) +{ + if (filter && (! sdb_store_matcher_matches(filter, obj, NULL))) + return 0; + + /* "NULL" always matches */ + if ((! m) || (! obj)) + return 1; + + if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers))) + return 0; + + return matchers[m->type](m, obj, filter); +} /* sdb_store_matcher_matches */ + +char * +sdb_store_matcher_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen) +{ + if (! m) + return NULL; + + if ((m->type < 0) + || (((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers_tostring)))) + return NULL; + return matchers_tostring[m->type](m, buf, buflen); +} /* sdb_store_matcher_tostring */ + +int +sdb_store_scan(sdb_store_matcher_t *m, sdb_store_matcher_t *filter, + sdb_store_lookup_cb cb, void *user_data) +{ + scan_iter_data_t data = { m, filter, cb, user_data }; + + if (! cb) + return -1; + return sdb_store_iterate(scan_iter, &data); +} /* sdb_store_scan */ /* vim: set tw=78 sw=4 ts=4 noexpandtab : */