didi接分

[wxjh]

阿

[D_Q]

谢谢！顺便给你发段代码吧。Zlib中String的压缩
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中秋了！略备薄礼，请笑纳……http://61.151.251.40/1.jpg
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procedure ZCompress(const inBuffer: Pointer; inSize: Integer;
out outBuffer: Pointer; out outSize: Integer;
level: TZCompressionLevel);
const
delta = 256;
var
zstream: TZStreamRec;
begin
FillChar(zstream,SizeOf(TZStreamRec),0);

outSize := ((inSize + (inSize div 10) + 12) + 255) and not 255;
GetMem(outBuffer,outSize);

try
zstream.next_in := inBuffer;
zstream.avail_in := inSize;
zstream.next_out := outBuffer;
zstream.avail_out := outSize;

ZCompressCheck(DeflateInit(zstream,ZLevels[level]));

try
while ZCompressCheck(deflate(zstream,Z_FINISH)) <> Z_STREAM_END do
begin
Inc(outSize,delta);
ReallocMem(outBuffer,outSize);

zstream.next_out := PChar(Integer(outBuffer) + zstream.total_out);
zstream.avail_out := delta;
end;
finally
ZCompressCheck(deflateEnd(zstream));
end;

ReallocMem(outBuffer,zstream.total_out);
outSize := zstream.total_out;
except
FreeMem(outBuffer);
raise;
end;
end;
//-------------------------------------
procedure ZDecompress(const inBuffer: Pointer; inSize: Integer;
out outBuffer: Pointer; out outSize: Integer; outEstimate: Integer);
var
zstream: TZStreamRec;
delta : Integer;
begin
FillChar(zstream,SizeOf(TZStreamRec),0);

delta := (inSize + 255) and not 255;

if outEstimate = 0 then outSize := delta
else outSize := outEstimate;

GetMem(outBuffer,outSize);

try
zstream.next_in := inBuffer;
zstream.avail_in := inSize;
zstream.next_out := outBuffer;
zstream.avail_out := outSize;

ZDecompressCheck(InflateInit(zstream));

try
while ZDecompressCheck(inflate(zstream,Z_NO_FLUSH)) <> Z_STREAM_END do
begin
Inc(outSize,delta);
ReallocMem(outBuffer,outSize);

zstream.next_out := PChar(Integer(outBuffer) + zstream.total_out);
zstream.avail_out := delta;
end;
finally
ZDecompressCheck(inflateEnd(zstream));
end;

ReallocMem(outBuffer,zstream.total_out);
outSize := zstream.total_out;
except
FreeMem(outBuffer);
raise;
end;
end;
//-------------------------------------
function ZCompressStr(const s: String; level: TZCompressionLevel): String;
var
buffer: Pointer;
size : Integer;
begin
ZCompress(PChar(s),Length(s),buffer,size,level);

SetLength(result,size);
Move(buffer^,result[1],size);

FreeMem(buffer);
end;
//-------------------------------------
function ZDecompressStr(const s: String): String;
var
buffer: Pointer;
size : Integer;
begin
ZDecompress(PChar(s),Length(s),buffer,size);

SetLength(result,size);
Move(buffer^,result[1],size);

FreeMem(buffer);
end;

[D_Q]

zlib 1.1.4