Improve handling ZInflaterInputStream's buffer error.

ars18wrw · ars18wrw · commit 1063ed080a0e · 2018-06-20T11:06:07.000+03:00
DEVSIX-1914
diff --git a/itext/itext.io/itext/io/util/zlib/ZInflaterInputStream.cs b/itext/itext.io/itext/io/util/zlib/ZInflaterInputStream.cs
@@ -136,10 +136,8 @@ public override int Read(byte[] b, int off, int len) {
                         nomoreinput=true;
                     }
                 }
-                err=z.inflate(flushLevel);
-                if(nomoreinput&&(err==JZlib.Z_BUF_ERROR))
-                    return(0);
-                if(err!=JZlib.Z_OK && err!=JZlib.Z_STREAM_END)
+                err = z.inflate(flushLevel);
+                if (err!=JZlib.Z_OK && err!=JZlib.Z_STREAM_END)
                     throw new IOException("inflating: "+z.msg);
                 if((nomoreinput||err==JZlib.Z_STREAM_END)&&(z.avail_out==len))
                     return(0);

Original file line number	Diff line number	Diff line change
`@@ -136,10 +136,8 @@ public override int Read(byte[] b, int off, int len) {`
`136`	`136`	`nomoreinput=true;`
`137`	`137`	`}`
`138`	`138`	`}`
`139`		`- err=z.inflate(flushLevel);`
`140`		`- if(nomoreinput&&(err==JZlib.Z_BUF_ERROR))`
`141`		`- return(0);`
`142`		`- if(err!=JZlib.Z_OK && err!=JZlib.Z_STREAM_END)`
	`139`	`+ err = z.inflate(flushLevel);`
	`140`	`+ if (err!=JZlib.Z_OK && err!=JZlib.Z_STREAM_END)`
`143`	`141`	`throw new IOException("inflating: "+z.msg);`
`144`	`142`	`if((nomoreinput\|\|err==JZlib.Z_STREAM_END)&&(z.avail_out==len))`
`145`	`143`	`return(0);`