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      1 /* Copyright (C) 2009 The Android Open Source Project
      2 **
      3 ** This software is licensed under the terms of the GNU General Public
      4 ** License version 2, as published by the Free Software Foundation, and
      5 ** may be copied, distributed, and modified under those terms.
      6 **
      7 ** This program is distributed in the hope that it will be useful,
      8 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
      9 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     10 ** GNU General Public License for more details.
     11 */
     12 #ifndef _ANDROID_UTILS_VECTOR_H
     13 #define _ANDROID_UTILS_VECTOR_H
     14 
     15 #include "android/utils/assert.h"
     16 #include "android/utils/compiler.h"
     17 #include "android/utils/system.h"
     18 
     19 ANDROID_BEGIN_HEADER
     20 
     21 #define  AVECTOR_DECL(ctype,name)  \
     22     ctype*    name; \
     23     unsigned  num_##name; \
     24     unsigned  max_##name \
     25 
     26 #define  AVECTOR_SIZE(obj,name)  \
     27     (obj)->num_##name
     28 
     29 #define  AVECTOR_INIT(obj,name)   \
     30     do { \
     31         (obj)->name = NULL; \
     32         (obj)->num_##name = 0; \
     33         (obj)->max_##name = 0; \
     34     } while (0)
     35 
     36 #define  AVECTOR_INIT_ALLOC(obj,name,count) \
     37     do { \
     38         AARRAY_NEW0( (obj)->name, (count) ); \
     39         (obj)->num_##name = 0; \
     40         (obj)->max_##name = (count); \
     41     } while (0)
     42 
     43 #define  AVECTOR_DONE(obj,name)  \
     44     do { \
     45         AFREE((obj)->name); \
     46         (obj)->num_##name = 0; \
     47         (obj)->max_##name = 0; \
     48     } while (0)
     49 
     50 #define  AVECTOR_CLEAR(obj,name) \
     51     do { \
     52         (obj)->num_##name = 0; \
     53     } while (0)
     54 
     55 #define  AVECTOR_AT(obj,name,index)  \
     56     (&(obj)->name[(index)])
     57 
     58 #define  AVECTOR_REALLOC(obj,name,newMax) \
     59     do { \
     60         AARRAY_RENEW((obj)->name,newMax); \
     61         (obj)->max_##name = (newMax); \
     62     } while(0)
     63 
     64 #define  AVECTOR_ENSURE(obj,name,newCount) \
     65     do { \
     66         unsigned  _newCount = (newCount); \
     67         if (_newCount > (obj)->max_##name) \
     68             AASSERT_LOC(); \
     69             _avector_ensure( (void**)&(obj)->name, sizeof((obj)->name[0]), \
     70                              &(obj)->max_##name, _newCount ); \
     71     } while (0);
     72 
     73 extern void  _avector_ensure( void**  items, size_t  itemSize,
     74                               unsigned*  pMaxItems, unsigned  newCount );
     75 
     76 #define  AVECTOR_FOREACH(obj,name,itemptr,statement) \
     77     do { \
     78         unsigned __vector_nn = 0; \
     79         unsigned __vector_max = (obj)->num_##name; \
     80         for ( ; __vector_nn < __vector_max; __vector_nn++ ) { \
     81             itemptr = &(obj)->name[__vector_nn]; \
     82             statement; \
     83         } \
     84     } while (0);
     85 
     86 ANDROID_END_HEADER
     87 
     88 #endif /* _ANDROID_UTILS_VECTOR_H */
     89