107 строки
1.8 KiB
C
107 строки
1.8 KiB
C
/*
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* dict.c
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*
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* Implementation of generic dictionary routines.
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* Copyright (C) 2001-2004 Farooq Mela.
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*
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* $Id: dict.c,v 1.7 2001/11/25 06:00:49 farooq Exp farooq $
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*/
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#include <stdlib.h>
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#include "dict.h"
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#include "dict_private.h"
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dict_malloc_func _dict_malloc = malloc;
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dict_free_func _dict_free = free;
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dict_malloc_func
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dict_set_malloc(dict_malloc_func func)
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{
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dict_malloc_func old = _dict_malloc;
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_dict_malloc = func ? func : malloc;
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return old;
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}
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dict_free_func
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dict_set_free(dict_free_func func)
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{
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dict_free_func old = _dict_free;
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_dict_free = func ? func : free;
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return old;
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}
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/*
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* In comparing, we cannot simply subtract because that might result in signed
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* overflow.
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*/
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int
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dict_int_cmp(const void *k1, const void *k2)
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{
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const int *a = (int*)k1, *b = (int*)k2;
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return (*a < *b) ? -1 : (*a > *b) ? +1 : 0;
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}
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int
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dict_uint_cmp(const void *k1, const void *k2)
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{
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const unsigned int *a = (unsigned int*)k1, *b = (unsigned int*)k2;
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return (*a < *b) ? -1 : (*a > *b) ? +1 : 0;
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}
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int
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dict_long_cmp(const void *k1, const void *k2)
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{
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const long *a = (long*)k1, *b = (long*)k2;
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return (*a < *b) ? -1 : (*a > *b) ? +1 : 0;
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}
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int
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dict_ulong_cmp(const void *k1, const void *k2)
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{
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const unsigned long *a = (unsigned long*)k1, *b = (unsigned long*)k2;
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return (*a < *b) ? -1 : (*a > *b) ? +1 : 0;
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}
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int
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dict_ptr_cmp(const void *k1, const void *k2)
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{
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return (k1 > k2) - (k1 < k2);
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}
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int
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dict_str_cmp(const void *k1, const void *k2)
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{
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const char *a = (char*)k1, *b = (char*)k2;
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char p, q;
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for (;;) {
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p = *a++; q = *b++;
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if (p == 0 || p != q)
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break;
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}
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return (p > q) - (p < q);
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}
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void
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dict_destroy(dict *dct, int del)
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{
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ASSERT(dct != NULL);
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dct->_destroy(dct->_object, del);
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FREE(dct);
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}
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void
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dict_itor_destroy(dict_itor *itor)
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{
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ASSERT(itor != NULL);
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itor->_destroy(itor->_itor);
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FREE(itor);
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}
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