Annotation of embedaddon/bird/lib/buffer.h, revision 1.1
1.1 ! misho 1: /*
! 2: * BIRD Library -- Generic Buffer Structure
! 3: *
! 4: * (c) 2013 Ondrej Zajicek <santiago@crfreenet.org>
! 5: * (c) 2013 CZ.NIC z.s.p.o.
! 6: *
! 7: * Can be freely distributed and used under the terms of the GNU GPL.
! 8: */
! 9:
! 10: #ifndef _BIRD_BUFFER_H_
! 11: #define _BIRD_BUFFER_H_
! 12:
! 13: #include "lib/resource.h"
! 14: #include "sysdep/config.h"
! 15:
! 16: #define BUFFER(type) struct { type *data; uint used, size; }
! 17:
! 18: #define BUFFER_SIZE(v) ((v).size * sizeof(* (v).data))
! 19:
! 20: #define BUFFER_INIT(v,pool,isize) \
! 21: ({ \
! 22: (v).used = 0; \
! 23: (v).size = (isize); \
! 24: (v).data = mb_alloc(pool, BUFFER_SIZE(v)); \
! 25: })
! 26:
! 27: #define BUFFER_SET(v,nsize) \
! 28: ({ \
! 29: (v).used = (nsize); \
! 30: if ((v).used > (v).size) \
! 31: buffer_realloc((void **) &((v).data), &((v).size), (v).used, sizeof(* (v).data)); \
! 32: })
! 33:
! 34: #define BUFFER_INC(v,step) \
! 35: ({ \
! 36: uint _o = (v).used; \
! 37: BUFFER_SET(v, (v).used + (step)); \
! 38: (v).data + _o; \
! 39: })
! 40:
! 41: #define BUFFER_DEC(v,step) ({ (v).used -= (step); })
! 42:
! 43: #define BUFFER_PUSH(v) (*BUFFER_INC(v,1))
! 44:
! 45: #define BUFFER_POP(v) BUFFER_DEC(v,1)
! 46:
! 47: #define BUFFER_FLUSH(v) ({ (v).used = 0; })
! 48:
! 49: #endif /* _BIRD_BUFFER_H_ */
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