c# - Extract the byte array of Zip files sent from C # in Objective-c side -

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it passes c # byte array of zip files via plugin in objective-c, want thaw in objective-c side, suffering not go well. byte data has been converted nsdata type using zlib following url reference tried thaw but, inflate (& stream, z_no_flush); of after review of our return value, have been returned z_data_error data can not decompressed zlib determined have been input not know cause, please tell me if there people knowledge

■ url

https://gist.github.com/hacha/9207616

http://www.zlib.net/zlib_how.html

sourcecode(c#)

using unityengine; using system.collections; using system.runtime.interopservices;  public class callplugin : monobehaviour {      [dllimport("__internal")]     private static extern void uncompressbygzip(byte[] zipbytearray,int ziplen);       public void callmain(byte[] unzipstream,int unziplength){          uncompressbygzip (unzipstream,unziplength);         debug.log ("test csharp");     } }

sourcecode(objective-c)

#import <foundation/foundation.h> #include <zlib.h>   extern "c"{     void uncompressbygzip(const char** ptrsrc, const int srclength); }   void uncompressbygzip(const char** ptrsrc, const int srclength) {     nsdata *source = [nsdata datawithbytes:(const void *)ptrsrc length:(sizeof(unsigned char) * srclength)];      nsstring* str = [nsstring stringwithformat:@"%d",srclength];     nslog(@"src = %@",str);     if (source.length == 0)         return;     nslog(@"11111");      z_stream stream;     stream.zalloc = z_null;     stream.zfree = z_null;     stream.opaque = z_null;     stream.avail_in = (uint)source.length;     stream.next_in = (bytef *)source.bytes;     stream.total_out = 0;     stream.avail_out = 0;      nslog(@"22222");     if (inflateinit2(&stream, 31) != z_ok)         return;      nslog(@"33333");     nsmutabledata *filesystemdata = [nsmutabledata datawithcapacity:0];     while (stream.avail_out == 0) {         nslog(@"12345");         bytef buffer[16384];         stream.next_out = buffer;         stream.avail_out = sizeof(buffer);         nsstring* avail_outbef = [nsstring stringwithformat:@"%d",(nsinteger)stream.avail_out];         nslog(@"avail_outbef = %@",avail_outbef);  //        inflate(&stream, z_finish);         int ret;         inflate(&stream,z_no_flush);         size_t length = sizeof(buffer) - stream.avail_out;          avail_outbef = [nsstring stringwithformat:@"%d",(nsinteger)stream.avail_out];         nslog(@"avail_outaft = %@",avail_outbef);          nsstring* strlength = [nsstring stringwithformat:@"%d",(nsinteger)length];         nslog(@"length = %@",strlength);          if (length > 0)             [filesystemdata appendbytes:buffer length:length];     }     inflateend(&stream);     nslog(@"44444"); }

your uncompressbygzip function taking const char** argument data buffer. i'm not familiar marshalling behavior c# code, looks suspicious since you're passing through byte []. guess want direct const char * instead of indirected pointer. call -[nsdata datawithbytes:length:] expects actual buffer, not pointer one.


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