1 #ifndef SBLIST_H 2 #define SBLIST_H 3 4 /* this file is part of libulz, as of commit 8ab361a27743aaf025323ee43b8b8876dc054fdd 5 modified for direct inclusion in microsocks. */ 6 7 8 #ifdef __cplusplus 9 extern "C" { 10 #endif 11 12 #include <stddef.h> 13 /* 14 * simple buffer list. 15 * 16 * this thing here is basically a generic dynamic array 17 * will realloc after every blockitems inserts 18 * can store items of any size. 19 * 20 * so think of it as a by-value list, as opposed to a typical by-ref list. 21 * you typically use it by having some struct on the stack, and pass a pointer 22 * to sblist_add, which will copy the contents into its internal memory. 23 * 24 */ 25 26 typedef struct { 27 size_t itemsize; 28 size_t blockitems; 29 size_t count; 30 size_t capa; 31 char* items; 32 } sblist; 33 34 #define sblist_getsize(X) ((X)->count) 35 #define sblist_get_count(X) ((X)->count) 36 #define sblist_empty(X) ((X)->count == 0) 37 38 // for dynamic style 39 sblist* sblist_new(size_t itemsize, size_t blockitems); 40 void sblist_free(sblist* l); 41 42 //for static style 43 void sblist_init(sblist* l, size_t itemsize, size_t blockitems); 44 void sblist_free_items(sblist* l); 45 46 // accessors 47 void* sblist_get(sblist* l, size_t item); 48 // returns 1 on success, 0 on OOM 49 int sblist_add(sblist* l, void* item); 50 int sblist_set(sblist* l, void* item, size_t pos); 51 void sblist_delete(sblist* l, size_t item); 52 char* sblist_item_from_index(sblist* l, size_t idx); 53 int sblist_grow_if_needed(sblist* l); 54 int sblist_insert(sblist* l, void* item, size_t pos); 55 /* same as sblist_add, but returns list index of new item, or -1 */ 56 size_t sblist_addi(sblist* l, void* item); 57 void sblist_sort(sblist *l, int (*compar)(const void *, const void *)); 58 /* insert element into presorted list, returns listindex of new entry or -1*/ 59 size_t sblist_insert_sorted(sblist* l, void* o, int (*compar)(const void *, const void *)); 60 61 #ifndef __COUNTER__ 62 #define __COUNTER__ __LINE__ 63 #endif 64 65 #define __sblist_concat_impl( x, y ) x##y 66 #define __sblist_macro_concat( x, y ) __sblist_concat_impl( x, y ) 67 #define __sblist_iterator_name __sblist_macro_concat(sblist_iterator, __COUNTER__) 68 69 // use with custom iterator variable 70 #define sblist_iter_counter(LIST, ITER, PTR) \ 71 for(size_t ITER = 0; (PTR = sblist_get(LIST, ITER)), ITER < sblist_getsize(LIST); ITER++) 72 73 // use with custom iterator variable, which is predeclared 74 #define sblist_iter_counter2(LIST, ITER, PTR) \ 75 for(ITER = 0; (PTR = sblist_get(LIST, ITER)), ITER < sblist_getsize(LIST); ITER++) 76 77 // use with custom iterator variable, which is predeclared and signed 78 // useful for a loop which can delete items from the list, and then decrease the iterator var. 79 #define sblist_iter_counter2s(LIST, ITER, PTR) \ 80 for(ITER = 0; (PTR = sblist_get(LIST, ITER)), ITER < (ssize_t) sblist_getsize(LIST); ITER++) 81 82 83 // uses "magic" iterator variable 84 #define sblist_iter(LIST, PTR) sblist_iter_counter(LIST, __sblist_iterator_name, PTR) 85 86 #ifdef __cplusplus 87 } 88 #endif 89 90 #pragma RcB2 DEP "sblist.c" "sblist_delete.c" 91 92 #endif 93