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#include "global.h" |
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|
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#include <cstdio> |
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|
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dynbuf::dynbuf (int initial, int extend) |
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{ |
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_size = 0; |
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ext = extend; |
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first = last = (chunk *)new char [sizeof (chunk) + initial]; |
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first->next = 0; |
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room = initial; |
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ptr = first->data; |
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} |
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|
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dynbuf::~dynbuf () |
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{ |
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clear (); |
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} |
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|
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void dynbuf::clear () |
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{ |
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while (first) |
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{ |
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chunk *next = first->next; |
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delete [] (char *)first; |
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first = next; |
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} |
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} |
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|
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void dynbuf::finish () |
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{ |
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// finalise current chunk |
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_size += last->size = ptr - last->data; |
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} |
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|
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void dynbuf::_reserve (int size) |
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{ |
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finish (); |
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|
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do |
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{ |
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ext += ext >> 1; |
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ext = (ext + 15) & ~15; |
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} |
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while (ext < size); |
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|
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chunk *add = (chunk *)new char [sizeof (chunk) + ext]; |
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add->next = 0; |
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|
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last->next = add; |
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last = add; |
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|
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room = ext; |
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ptr = last->data; |
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} |
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|
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void dynbuf::linearise (void *data) |
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{ |
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char *p = (char *)data; |
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|
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last->size = ptr - last->data; |
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|
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for (chunk *c = first; c; c = c->next) |
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{ |
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memcpy (p, c->data, c->size); |
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p += c->size; |
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} |
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} |
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|
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char *dynbuf::linearise () |
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{ |
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if (first->next) |
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{ |
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finish (); |
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|
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chunk *add = (chunk *)new char [sizeof (chunk) + _size]; |
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|
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add->next = 0; |
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linearise ((void *)add->data); |
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clear (); |
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|
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first = last = add; |
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ptr = last->data + _size; |
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_size = 0; |
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room = 0; |
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} |
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|
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return first->data; |
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} |
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|
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void dynbuf::add (sint32 i) |
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{ |
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char buf [max_sint32_size]; |
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char *p = buf + sizeof (buf); |
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char neg; |
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|
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if (i < 0) |
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{ |
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neg = '-'; |
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i = -i; |
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} |
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else |
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neg = 0; |
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|
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uint32 val = i; |
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|
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do |
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{ |
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uint32 div = val / 10; |
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*--p = '0' + char (val - div * 10); |
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val = div; |
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} |
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while (val); |
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|
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if (neg) |
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*--p = neg; |
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|
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add ((void *)p, buf + sizeof (buf) - p); |
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} |
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|
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void dynbuf::add (sint64 i) |
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{ |
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if (i > -10000000 && i < 10000000) |
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{ |
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add (sint32 (i)); |
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return; |
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} |
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|
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if (i < 0) |
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{ |
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add ('-'); |
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i = -i; |
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} |
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|
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if (i > 1000000000000000) |
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{ |
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add (sint32 (i / 1000000000000000)); |
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i %= 1000000000000000; |
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} |
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|
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if (i > 10000000) |
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{ |
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add (sint32 (i / 10000000)); |
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i %= 10000000; |
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} |
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|
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add (sint32 (i)); |
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} |
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