jens
a7b916431e
- improved STO correction [Buffer] - renamed readAt to peekAt - added readAt which consumes git-svn-id: http://moon:8086/svn/matlab/trunk@86 801c6759-fa7c-4059-a304-17956f83a07c
55 lines
1.2 KiB
Objective-C
55 lines
1.2 KiB
Objective-C
function [buf] = buffer()
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buf = struct('mem', [], 'ri', 0, 'wi', 0, 'obj', @()obj_(), 'len', @()len_(), 'read', @(len)read_(len), 'readAt', @(len, offset)readAt_(len, offset), 'peekAt', @(len, offset)peekAt_(len, offset), 'setReadIndex', @(offset)setReadIndex_(offset), 'setReadIndexRelative', @(offset)setReadIndexRelative_(offset), 'write', @(x)write_(x));
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function b = obj_()
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b = buf;
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end
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function len = len_()
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len = 0;
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if (buf.wi > buf.ri)
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len = buf.wi - buf.ri;
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end
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end
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function [x] = peekAt_(len, offset)
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x = [];
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if (buf.ri+offset) >= 0
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if (buf.wi-(buf.ri+offset) >= len)
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x = buf.mem(buf.ri+1+offset:buf.ri+len+offset);
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end
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end
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end
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function [x] = readAt_(len, offset)
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x = peekAt_(len, offset);
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if ~isempty(x)
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buf.ri = buf.ri + len;
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end
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end
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function [x] = read_(len)
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x = peekAt_(len, 0);
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if ~isempty(x)
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buf.ri = buf.ri + len;
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end
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end
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function setReadIndex_(offset)
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buf.ri = offset;
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end
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function setReadIndexRelative_(offset)
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buf.ri = buf.ri+offset;
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end
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function write_(x)
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len = length(x);
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buf.mem(buf.wi+1:buf.wi+len, :) = x;
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buf.wi = buf.wi + len;
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end
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end
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