postlicyd/filter.h

   1 /******************************************************************************/
   2 /*          pfixtools: a collection of postfix related tools                  */
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  30 /******************************************************************************/
  31
  32 /*
  33  * Copyright © 2008 Florent Bruneau
  34  */
  35
  36 #ifndef PFIXTOOLS_FILTER_H
  37 #define PFIXTOOLS_FILTER_H
  38
  39 #include "common.h"
  40 #include "filter_tokens.h"
  41 #include "query.h"
  42 #include "array.h"
  43
  44 typedef filter_token filter_type_t;
  45
  46 typedef struct filter_hook_t {
  47     char *name;
  48     char *value;
  49
  50     bool postfix;
  51     int filter_id;
  52 } filter_hook_t;
  53 ARRAY(filter_hook_t)
  54
  55 typedef struct filter_params_t {
  56     char *name;
  57     char *value;
  58 } filter_params_t;
  59 ARRAY(filter_params_t)
  60
  61 typedef struct filter_t {
  62     char *name;
  63     filter_type_t type;
  64
  65     A(filter_hook_t)   hooks;
  66     void *data;
  67
  68     A(filter_params_t) params;
  69 } filter_t;
  70 ARRAY(filter_t)
  71
  72 #define FILTER_INIT { NULL, FTK_UNKNOWN, ARRAY_INIT, NULL, ARRAY_INIT }
  73
  74 typedef const char *filter_result_t;
  75 typedef filter_result_t (*filter_runner_t)(const filter_t *filter,
  76                                            const query_t *query);
  77 typedef bool (*filter_constructor_t)(filter_t *filter);
  78 typedef void (*filter_destructor_t)(filter_t *filter);
  79
  80 __attribute__((nonnull(1,4)))
  81 void filter_register(const char *type, filter_constructor_t constructor,
  82                      filter_destructor_t destructor, filter_runner_t runner);
  83
  84 __attribute__((nonnull(1)))
  85 static inline void filter_init(filter_t *filter)
  86 {
  87     const filter_t f = FILTER_INIT;
  88     *filter = f;
  89 }
  90
  91 __attribute__((nonnull(1,2)))
  92 void filter_set_name(filter_t *filter, const char *name, ssize_t len);
  93
  94 __attribute__((nonnull(1,2)))
  95 bool filter_set_type(filter_t *filter, const char *type, ssize_t len);
  96
  97 __attribute__((nonnull(1,2,4)))
  98 bool filter_add_param(filter_t *filter, const char *name, ssize_t name_len,
  99                       const char *value, ssize_t value_len);
 100
 101 __attribute__((nonnull(1,2,4)))
 102 bool filter_add_hook(filter_t *filter, const char *name, ssize_t name_len,
 103                      const char *value, ssize_t value_len);
 104
 105 __attribute__((nonnull(1)))
 106 bool filter_build(filter_t *filter);
 107
 108 __attribute__((nonnull(1,2)))
 109 static inline int filter_find_with_name(A(filter_t) *array, const char *name)
 110 {
 111     int start = 0;
 112     int end   = array->len;
 113
 114     while (start < end) {
 115         int mid = (start + end) / 2;
 116         int cmp = strcmp(name, array_elt(*array, mid).name);
 117
 118         if (cmp == 0) {
 119             return mid;
 120         } else if (cmp < 0) {
 121             end = mid;
 122         } else {
 123             start = mid + 1;
 124         }
 125     }
 126     return -1;
 127 }
 128
 129 __attribute__((nonnull(1,2)))
 130 bool filter_update_references(filter_t *filter, A(filter_t) *array);
 131
 132 __attribute__((nonnull(1)))
 133 static inline void filter_hook_wipe(filter_hook_t *hook)
 134 {
 135     p_delete(&hook->name);
 136     p_delete(&hook->value);
 137 }
 138
 139 __attribute__((nonnull(1)))
 140 static inline void filter_params_wipe(filter_params_t *param)
 141 {
 142     p_delete(&param->name);
 143     p_delete(&param->value);
 144 }
 145
 146 __attribute__((nonnull(1)))
 147 void filter_wipe(filter_t *filter);
 148
 149 __attribute__((nonnull(1,2)))
 150 filter_result_t filter_run(const filter_t *filter, const query_t *query);
 151
 152
 153 #endif