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https://github.com/darlinghq/darling-libkqueue.git
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233 lines
12 KiB
C
233 lines
12 KiB
C
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/*
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Copyright (c) 2008-2013, Troy D. Hanson http://troydhanson.github.com/uthash/
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* a dynamic array implementation using macros
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*/
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#ifndef UTARRAY_H
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#define UTARRAY_H
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#define UTARRAY_VERSION 1.9.8
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#ifdef __GNUC__
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#define _UNUSED_ __attribute__ ((__unused__))
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#else
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#define _UNUSED_
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#endif
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#include <stddef.h> /* size_t */
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#include <string.h> /* memset, etc */
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#include <stdlib.h> /* exit */
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#define oom() exit(-1)
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typedef void (ctor_f)(void *dst, const void *src);
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typedef void (dtor_f)(void *elt);
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typedef void (init_f)(void *elt);
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typedef struct {
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size_t sz;
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init_f *init;
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ctor_f *copy;
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dtor_f *dtor;
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} UT_icd;
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typedef struct {
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unsigned i,n;/* i: index of next available slot, n: num slots */
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UT_icd icd; /* initializer, copy and destructor functions */
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char *d; /* n slots of size icd->sz*/
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} UT_array;
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#define utarray_init(a,_icd) do { \
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memset(a,0,sizeof(UT_array)); \
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(a)->icd=*_icd; \
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} while(0)
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#define utarray_done(a) do { \
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if ((a)->n) { \
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if ((a)->icd.dtor) { \
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size_t _ut_i; \
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for(_ut_i=0; _ut_i < (a)->i; _ut_i++) { \
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(a)->icd.dtor(utarray_eltptr(a,_ut_i)); \
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} \
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} \
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free((a)->d); \
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} \
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(a)->n=0; \
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} while(0)
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#define utarray_new(a,_icd) do { \
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a=(UT_array*)malloc(sizeof(UT_array)); \
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utarray_init(a,_icd); \
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} while(0)
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#define utarray_free(a) do { \
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utarray_done(a); \
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free(a); \
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} while(0)
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#define utarray_reserve(a,by) do { \
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if (((a)->i+by) > ((a)->n)) { \
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while(((a)->i+by) > ((a)->n)) { (a)->n = ((a)->n ? (2*(a)->n) : 8); } \
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if ( ((a)->d=(char*)realloc((a)->d, (a)->n*(a)->icd.sz)) == NULL) oom(); \
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} \
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} while(0)
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#define utarray_push_back(a,p) do { \
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utarray_reserve(a,1); \
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if ((a)->icd.copy) { (a)->icd.copy( _utarray_eltptr(a,(a)->i++), p); } \
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else { memcpy(_utarray_eltptr(a,(a)->i++), p, (a)->icd.sz); }; \
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} while(0)
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#define utarray_pop_back(a) do { \
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if ((a)->icd.dtor) { (a)->icd.dtor( _utarray_eltptr(a,--((a)->i))); } \
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else { (a)->i--; } \
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} while(0)
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#define utarray_extend_back(a) do { \
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utarray_reserve(a,1); \
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if ((a)->icd.init) { (a)->icd.init(_utarray_eltptr(a,(a)->i)); } \
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else { memset(_utarray_eltptr(a,(a)->i),0,(a)->icd.sz); } \
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(a)->i++; \
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} while(0)
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#define utarray_len(a) ((a)->i)
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#define utarray_eltptr(a,j) (((j) < (a)->i) ? _utarray_eltptr(a,j) : NULL)
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#define _utarray_eltptr(a,j) ((char*)((a)->d + ((a)->icd.sz*(j) )))
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#define utarray_insert(a,p,j) do { \
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if (j > (a)->i) utarray_resize(a,j); \
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utarray_reserve(a,1); \
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if ((j) < (a)->i) { \
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memmove( _utarray_eltptr(a,(j)+1), _utarray_eltptr(a,j), \
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((a)->i - (j))*((a)->icd.sz)); \
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} \
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if ((a)->icd.copy) { (a)->icd.copy( _utarray_eltptr(a,j), p); } \
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else { memcpy(_utarray_eltptr(a,j), p, (a)->icd.sz); }; \
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(a)->i++; \
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} while(0)
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#define utarray_inserta(a,w,j) do { \
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if (utarray_len(w) == 0) break; \
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if (j > (a)->i) utarray_resize(a,j); \
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utarray_reserve(a,utarray_len(w)); \
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if ((j) < (a)->i) { \
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memmove(_utarray_eltptr(a,(j)+utarray_len(w)), \
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_utarray_eltptr(a,j), \
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((a)->i - (j))*((a)->icd.sz)); \
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} \
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if ((a)->icd.copy) { \
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size_t _ut_i; \
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for(_ut_i=0;_ut_i<(w)->i;_ut_i++) { \
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(a)->icd.copy(_utarray_eltptr(a,j+_ut_i), _utarray_eltptr(w,_ut_i)); \
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} \
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} else { \
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memcpy(_utarray_eltptr(a,j), _utarray_eltptr(w,0), \
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utarray_len(w)*((a)->icd.sz)); \
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} \
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(a)->i += utarray_len(w); \
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} while(0)
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#define utarray_resize(dst,num) do { \
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size_t _ut_i; \
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if (dst->i > (size_t)(num)) { \
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if ((dst)->icd.dtor) { \
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for(_ut_i=num; _ut_i < dst->i; _ut_i++) { \
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(dst)->icd.dtor(utarray_eltptr(dst,_ut_i)); \
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} \
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} \
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} else if (dst->i < (size_t)(num)) { \
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utarray_reserve(dst,num-dst->i); \
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if ((dst)->icd.init) { \
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for(_ut_i=dst->i; _ut_i < num; _ut_i++) { \
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(dst)->icd.init(utarray_eltptr(dst,_ut_i)); \
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} \
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} else { \
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memset(_utarray_eltptr(dst,dst->i),0,(dst)->icd.sz*(num-dst->i)); \
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} \
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} \
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dst->i = num; \
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} while(0)
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#define utarray_concat(dst,src) do { \
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utarray_inserta((dst),(src),utarray_len(dst)); \
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} while(0)
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#define utarray_erase(a,pos,len) do { \
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if ((a)->icd.dtor) { \
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size_t _ut_i; \
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for(_ut_i=0; _ut_i < len; _ut_i++) { \
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(a)->icd.dtor(utarray_eltptr((a),pos+_ut_i)); \
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} \
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} \
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if ((a)->i > (pos+len)) { \
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memmove( _utarray_eltptr((a),pos), _utarray_eltptr((a),pos+len), \
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(((a)->i)-(pos+len))*((a)->icd.sz)); \
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} \
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(a)->i -= (len); \
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} while(0)
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#define utarray_renew(a,u) do { \
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if (a) utarray_clear(a); \
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else utarray_new((a),(u)); \
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} while(0)
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#define utarray_clear(a) do { \
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if ((a)->i > 0) { \
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if ((a)->icd.dtor) { \
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size_t _ut_i; \
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for(_ut_i=0; _ut_i < (a)->i; _ut_i++) { \
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(a)->icd.dtor(utarray_eltptr(a,_ut_i)); \
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} \
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} \
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(a)->i = 0; \
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} \
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} while(0)
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#define utarray_sort(a,cmp) do { \
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qsort((a)->d, (a)->i, (a)->icd.sz, cmp); \
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} while(0)
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#define utarray_find(a,v,cmp) bsearch((v),(a)->d,(a)->i,(a)->icd.sz,cmp)
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#define utarray_front(a) (((a)->i) ? (_utarray_eltptr(a,0)) : NULL)
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#define utarray_next(a,e) (((e)==NULL) ? utarray_front(a) : ((((a)->i) > (utarray_eltidx(a,e)+1)) ? _utarray_eltptr(a,utarray_eltidx(a,e)+1) : NULL))
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#define utarray_prev(a,e) (((e)==NULL) ? utarray_back(a) : ((utarray_eltidx(a,e) > 0) ? _utarray_eltptr(a,utarray_eltidx(a,e)-1) : NULL))
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#define utarray_back(a) (((a)->i) ? (_utarray_eltptr(a,(a)->i-1)) : NULL)
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#define utarray_eltidx(a,e) (((char*)(e) >= (char*)((a)->d)) ? (((char*)(e) - (char*)((a)->d))/(ssize_t)(a)->icd.sz) : -1)
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/* last we pre-define a few icd for common utarrays of ints and strings */
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static void utarray_str_cpy(void *dst, const void *src) {
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char **_src = (char**)src, **_dst = (char**)dst;
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*_dst = (*_src == NULL) ? NULL : strdup(*_src);
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}
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static void utarray_str_dtor(void *elt) {
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char **eltc = (char**)elt;
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if (*eltc) free(*eltc);
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}
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static const UT_icd ut_str_icd _UNUSED_ = {sizeof(char*),NULL,utarray_str_cpy,utarray_str_dtor};
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static const UT_icd ut_int_icd _UNUSED_ = {sizeof(int),NULL,NULL,NULL};
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static const UT_icd ut_ptr_icd _UNUSED_ = {sizeof(void*),NULL,NULL,NULL};
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#endif /* UTARRAY_H */
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