version 1.6, 2006/05/10 19:40:38
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version 1.7, 2006/06/29 22:53:30
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PEGASUS_NAMESPACE_BEGIN | PEGASUS_NAMESPACE_BEGIN |
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BufferRep Buffer::_empty_rep = { 0, 0, {0} }; |
// |
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// Note: _empty_rep is the only BufferRep object that may have a zero capacity. |
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// So "_rep->cap == 0" implies "_rep == _empty_rep". But some platforms produce |
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// more than one instance of _empty_rep (strangely). Therefore, it is safer to |
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// use the former test rather than the latter. |
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// |
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BufferRep Buffer::_empty_rep = |
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{ |
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0, /* size */ |
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0, /* cap (zero implies it is the _empty_rep) */ |
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{0} /* data[0] */ |
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}; |
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static const size_t MIN_CAPACITY = 2048; | static const size_t MIN_CAPACITY = 2048; |
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static inline BufferRep* _allocate(size_t cap) | static inline BufferRep* _allocate(size_t cap) |
{ | { |
BufferRep* rep = (BufferRep*)malloc(sizeof(BufferRep) + cap); |
if (cap < MIN_CAPACITY) |
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cap = MIN_CAPACITY; |
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// Allocate an extra byte for null-termination performed by getData(). |
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BufferRep* rep = (BufferRep*)malloc(sizeof(BufferRep) + cap + 1); |
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if (!rep) | if (!rep) |
{ | { |
throw PEGASUS_STD(bad_alloc)(); | throw PEGASUS_STD(bad_alloc)(); |
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static inline BufferRep* _reallocate(BufferRep* rep, size_t cap) | static inline BufferRep* _reallocate(BufferRep* rep, size_t cap) |
{ | { |
rep = (BufferRep*)realloc(rep, sizeof(BufferRep) + cap); |
// Allocate an extra byte for null-termination performed by getData(). |
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rep = (BufferRep*)realloc(rep, sizeof(BufferRep) + cap + 1); |
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if (!rep) | if (!rep) |
{ | { |
throw PEGASUS_STD(bad_alloc)(); | throw PEGASUS_STD(bad_alloc)(); |
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{ | { |
if (x._rep->size > _rep->cap) | if (x._rep->size > _rep->cap) |
{ | { |
if (_rep != &_empty_rep) |
if (_rep->cap != 0) |
free(_rep); | free(_rep); |
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_rep = _allocate(x._rep->cap); | _rep = _allocate(x._rep->cap); |
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void Buffer::_reserve_aux(size_t cap) | void Buffer::_reserve_aux(size_t cap) |
{ | { |
if (_rep == &_empty_rep) |
if (_rep->cap == 0) |
{ | { |
_rep = _allocate(cap); | _rep = _allocate(cap); |
_rep->size = 0; | _rep->size = 0; |
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void Buffer::_append_char_aux() | void Buffer::_append_char_aux() |
{ | { |
if (_rep == &_empty_rep) |
if (_rep->cap == 0) |
{ | { |
_rep = _allocate(MIN_CAPACITY); | _rep = _allocate(MIN_CAPACITY); |
_rep->size = 0; | _rep->size = 0; |
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memcpy(rep->data + pos, data, size); | memcpy(rep->data + pos, data, size); |
memcpy(rep->data + pos + size, _rep->data + pos, rem); | memcpy(rep->data + pos + size, _rep->data + pos, rem); |
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if (_rep != &_empty_rep) |
if (_rep->cap != 0) |
free(_rep); | free(_rep); |
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_rep = rep; | _rep = rep; |