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278 lines
15 KiB
278 lines
15 KiB
19 years ago
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#ifndef TEMPLATE_H
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#define TEMPLATE_H
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#include <stdio.h>
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#include <string.h>
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#include "memory.h"
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#undef assert
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/* gcc-3.0 sucks */
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#if defined(DEBUG) && defined(NDEBUG)
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#error "Can't debug and notdebug both"
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#endif
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#if !defined(DEBUG) && !defined(NDEBUG)
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#define NDEBUG
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#endif
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#ifdef NDEBUG
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# define DEBUG_ONLY( stmt )
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# define assert(x) (void)0
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#else
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# define DEBUG_ONLY( stmt ) stmt
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# define assert(x) ((x) ? 1 : _myassertbug(__LINE__, __FILE__, #x))
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extern int _myassertbug(int line, char *file, char *err);
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#endif
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#ifdef __STRICT_ANSI__
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#define inline __inline__
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#endif
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static inline unsigned long strhash(const char *x, unsigned char pow) {
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unsigned long i = 0;
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while (*x) {
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i = (i * 39 + *x) % (1UL << pow);
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x++;
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}
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return i;
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}
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#define KEEP(TYPE) ((void(*)(TYPE))NULL)
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#define LIST(NAME,TYPE) \
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typedef struct NAME NAME; \
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struct NAME { TYPE value; struct NAME *next; }; \
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void insert_##NAME(NAME **where, TYPE v); \
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void insert_l_##NAME(NAME **where, TYPE v, int line); \
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TYPE remove_##NAME(NAME **where); \
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void delete_##NAME(NAME **where); \
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void free_##NAME(NAME *l)
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#define LIST_IMPL_2(NAME,TYPE,FREE,LFREE) \
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TYPE remove_##NAME(NAME **where) { \
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NAME *next; \
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TYPE res; \
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assert(*where != NULL); \
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next = (*where)->next; \
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res = (*where)->value; \
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LFREE(*where, sizeof(NAME)); \
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*where = next; \
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return res; \
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} \
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void delete_##NAME(NAME **where) { \
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NAME *next; \
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assert(*where != NULL); \
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next = (*where)->next; \
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if (FREE != NULL) (FREE)((*where)->value); \
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LFREE(*where, sizeof(NAME)); \
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*where = next; \
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} \
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void free_##NAME(NAME *l) { \
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NAME *n; \
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while (l != NULL) { \
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n = l->next; \
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if (FREE != NULL) (FREE)(l->value); \
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LFREE(l, sizeof(NAME)); \
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l = n; \
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} \
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}
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#define LIST_IMPL(NAME,TYPE,FREE,LMALLOC,LFREE) \
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void insert_##NAME(NAME **where, TYPE v) { \
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NAME *n = *where; \
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*where = LMALLOC(sizeof(NAME)); \
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if (*where == NULL) \
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die("insert_" #NAME " malloc:"); \
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(*where)->value = v; \
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(*where)->next = n; \
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} \
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LIST_IMPL_2(NAME,TYPE,FREE,LFREE)
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#define LIST_IMPLX(NAME,TYPE,FREE) \
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void insert_l_##NAME(NAME **where, TYPE v, int line) { \
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NAME *n = *where; \
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*where = block_malloc2(sizeof(NAME), line); \
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if (*where == NULL) \
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die("insert_" #NAME " malloc:"); \
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(*where)->value = v; \
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(*where)->next = n; \
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} \
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LIST_IMPL_2(NAME,TYPE,FREE,block_free)
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#define HASH(TYPE, KEY, VALUE) \
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typedef struct TYPE TYPE; \
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typedef struct TYPE##_iter TYPE##_iter; \
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struct TYPE##_iter { \
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unsigned long i; TYPE *h; KEY k; VALUE v; \
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}; \
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TYPE *new_##TYPE(void); \
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void free_##TYPE(TYPE *h); \
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TYPE##_iter first_##TYPE(TYPE *h); \
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TYPE##_iter next_##TYPE(TYPE##_iter i); \
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int done_##TYPE(TYPE##_iter i); \
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\
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void iterate_##TYPE(TYPE *h, void (*itf)(TYPE*,VALUE,void*), \
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void *data); \
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VALUE lookup_##TYPE(TYPE *h, KEY k); \
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void add_##TYPE(TYPE *h, KEY k, VALUE v); \
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VALUE replace_##TYPE(TYPE *h, KEY k, VALUE v); \
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VALUE remove_##TYPE(TYPE *h, KEY k)
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#define HASH_MAGIC (0x22DEAD22)
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#define HASH_IMPL(TYPE, KEY, VALUE, POW2, HASH, CMP, FREEK, FREEV) \
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struct TYPE { \
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unsigned long magic; \
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unsigned long size; \
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unsigned long n_used; \
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unsigned long n_collisions; \
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struct { KEY key; VALUE value; } *hash; \
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}; \
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TYPE *new_##TYPE(void) { \
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size_t i; \
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TYPE *h = malloc(sizeof(TYPE)); \
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if (h == NULL) die("new_" #TYPE " malloc:"); \
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\
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h->magic = HASH_MAGIC; \
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h->size = (1 << POW2); \
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h->n_used = 0; \
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h->n_collisions = 0; \
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h->hash = malloc(sizeof(*h->hash) * h->size ); \
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if (h == NULL) die("new_" #TYPE " hash malloc:"); \
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\
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for (i = 0; i < h->size; i++) { \
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h->hash[i].key = NULL; \
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h->hash[i].value = NULL; \
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} \
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\
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return h; \
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} \
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\
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void free_##TYPE(TYPE *h) { \
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size_t i; \
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if (h == NULL) return; \
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assert(h->magic == HASH_MAGIC); \
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/* printf("Freeing: size: %lu used: %lu coll: %lu\n", */ \
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/* h->size, h->n_used, h->n_collisions); */ \
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h->magic = ~HASH_MAGIC; \
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for (i = 0; i < h->size; i++) { \
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if (FREEK && h->hash[i].key) \
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(FREEK)(h->hash[i].key); \
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if (FREEV && h->hash[i].value) \
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(FREEV)(h->hash[i].value); \
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} \
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free(h->hash); \
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free(h); \
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} \
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\
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void iterate_##TYPE(TYPE *h, void (*itf)(TYPE*,VALUE,void*), \
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void *data) \
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{ \
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TYPE##_iter x; \
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for (x = first_##TYPE(h); \
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!done_##TYPE(x); \
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x = next_##TYPE(x)) \
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{ \
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itf(h, x.v, data); \
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} \
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} \
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\
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TYPE##_iter first_##TYPE(TYPE *h) { \
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TYPE##_iter i; \
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i.i = 0; \
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i.h = h; \
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return next_##TYPE(i); \
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} \
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\
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TYPE##_iter next_##TYPE(TYPE##_iter i) { \
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assert(i.h->magic == HASH_MAGIC); \
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while(i.i < i.h->size) { \
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if (i.h->hash[i.i].value != NULL) { \
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i.k = i.h->hash[i.i].key; \
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i.v = i.h->hash[i.i].value; \
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i.i++; \
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return i; \
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} \
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i.i++; \
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} \
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i.h = NULL; \
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return i; \
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} \
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\
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int done_##TYPE(TYPE##_iter i) { \
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assert(i.h == NULL || i.h->magic == HASH_MAGIC); \
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assert(i.h == NULL || (i.k != NULL && i.v != NULL)); \
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assert(i.h == NULL || (0 < i.i && i.i <= i.h->size)); \
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return i.h == NULL; \
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} \
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\
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VALUE lookup_##TYPE(TYPE *h, KEY k) { \
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int i = HASH(k, POW2); \
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assert(h->magic == HASH_MAGIC); \
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assert(h->n_used < h->size); /* ensure termination */ \
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while(h->hash[i].key) { \
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if ((CMP)(h->hash[i].key, k) == 0) { \
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if (h->hash[i].value != NULL) { \
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return h->hash[i].value; \
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} \
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} \
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i = (i + 1) % (1 << POW2); \
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} \
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return NULL; \
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} \
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\
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void add_##TYPE(TYPE *h, KEY k, VALUE v) { \
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int i = HASH(k, POW2); \
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assert(h->magic == HASH_MAGIC); \
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assert(h->n_used < h->size); /* ensure termination */ \
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assert(v != NULL); \
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while(h->hash[i].value) { \
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assert((CMP)(h->hash[i].key, k) != 0); \
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i = (i + 1) % (1 << POW2); \
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h->n_collisions++; \
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} \
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if (FREEK != NULL && h->hash[i].key) \
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FREEK(h->hash[i].key); \
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h->n_used++; \
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h->hash[i].key = k; \
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h->hash[i].value = v; \
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} \
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\
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VALUE replace_##TYPE(TYPE *h, KEY k, VALUE v) { \
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VALUE tmp; \
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int i = HASH(k,POW2); \
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assert(h->magic == HASH_MAGIC); \
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assert(v != NULL); \
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while(h->hash[i].key) { \
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if ((CMP)(h->hash[i].key, k) == 0) break; \
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i = (i + 1) % (1 << POW2); \
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} \
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assert(h->hash[i].value != NULL); \
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tmp = h->hash[i].value; \
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h->hash[i].key = k; \
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h->hash[i].value = v; \
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return tmp; \
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} \
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\
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VALUE remove_##TYPE(TYPE *h, KEY k) { \
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VALUE tmp; \
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int i = HASH(k, POW2); \
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assert(h->magic == HASH_MAGIC); \
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while(h->hash[i].key) { \
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if ((CMP)(h->hash[i].key, k) == 0) break; \
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i = (i + 1) % (1 << POW2); \
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} \
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tmp = h->hash[i].value; \
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h->hash[i].value = NULL; \
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if (tmp != NULL) h->n_used--; \
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return tmp; \
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}
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#endif
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