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use dynamically sized unzip/zip buffer
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parent
c857e9c887
commit
60ae9c827e
@ -19,7 +19,7 @@
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#ifdef ZLIB
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#ifdef ZLIB
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static char UNUSED id[] = "$Id: conn-zip.c,v 1.7 2005/04/25 18:37:16 fw Exp $";
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static char UNUSED id[] = "$Id: conn-zip.c,v 1.8 2005/07/07 18:48:33 fw Exp $";
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#include "imp.h"
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#include "imp.h"
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#include <assert.h>
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#include <assert.h>
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@ -30,6 +30,7 @@ static char UNUSED id[] = "$Id: conn-zip.c,v 1.7 2005/04/25 18:37:16 fw Exp $";
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#include "conn-func.h"
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#include "conn-func.h"
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#include "log.h"
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#include "log.h"
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#include "array.h"
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#include "exp.h"
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#include "exp.h"
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#include "conn-zip.h"
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#include "conn-zip.h"
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@ -87,19 +88,16 @@ Zip_Buffer( CONN_ID Idx, char *Data, int Len )
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assert( Idx > NONE );
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assert( Idx > NONE );
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assert( Data != NULL );
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assert( Data != NULL );
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assert( Len > 0 );
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assert( Len > 0 );
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assert( Len <= ZWRITEBUFFER_LEN );
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/* Ist noch Platz im Kompressions-Puffer? */
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if (Len < 0 || Len > ZWRITEBUFFER_LEN) return false;
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if( ZWRITEBUFFER_LEN - My_Connections[Idx].zip.wdatalen < Len + 50 )
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{
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if ( array_bytes( &My_Connections[Idx].zip.wbuf ) >= ZWRITEBUFFER_LEN ) {
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/* Nein! Puffer zunaechst leeren ...*/
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/* compression buffer is full, flush */
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if( ! Zip_Flush( Idx )) return false;
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if( ! Zip_Flush( Idx )) return false;
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}
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}
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/* Daten kopieren */
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return array_catb( &My_Connections[Idx].zip.wbuf, Data, Len );
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memmove( My_Connections[Idx].zip.wbuf + My_Connections[Idx].zip.wdatalen, Data, Len );
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My_Connections[Idx].zip.wdatalen += Len;
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return true;
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} /* Zip_Buffer */
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} /* Zip_Buffer */
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@ -109,16 +107,24 @@ Zip_Flush( CONN_ID Idx )
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/* Daten komprimieren und in Schreibpuffer kopieren.
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/* Daten komprimieren und in Schreibpuffer kopieren.
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* Es wird true bei Erfolg, sonst false geliefert. */
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* Es wird true bei Erfolg, sonst false geliefert. */
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int result, out_len;
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int result;
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unsigned char zipbuf[WRITEBUFFER_LEN];
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unsigned int zipbuf_used = 0;
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z_stream *out;
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z_stream *out;
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out = &My_Connections[Idx].zip.out;
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out = &My_Connections[Idx].zip.out;
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out->next_in = (void *)My_Connections[Idx].zip.wbuf;
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out->next_in = array_start(&My_Connections[Idx].zip.wbuf);
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out->avail_in = My_Connections[Idx].zip.wdatalen;
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assert(out->next_in);
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out->next_out = (void *)(My_Connections[Idx].wbuf + My_Connections[Idx].wdatalen);
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if (!out->next_in)
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out->avail_out = WRITEBUFFER_LEN - My_Connections[Idx].wdatalen;
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return false;
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out->avail_in = array_bytes(&My_Connections[Idx].zip.wbuf);
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out->next_out = zipbuf;
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out->avail_out = sizeof zipbuf;
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Log(LOG_DEBUG, "out->avail_in %d, out->avail_out %d", out->avail_in, out->avail_out);
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result = deflate( out, Z_SYNC_FLUSH );
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result = deflate( out, Z_SYNC_FLUSH );
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if(( result != Z_OK ) || ( out->avail_in > 0 ))
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if(( result != Z_OK ) || ( out->avail_in > 0 ))
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{
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{
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@ -127,11 +133,15 @@ Zip_Flush( CONN_ID Idx )
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return false;
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return false;
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}
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}
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out_len = WRITEBUFFER_LEN - My_Connections[Idx].wdatalen - out->avail_out;
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assert(out->avail_out <= WRITEBUFFER_LEN);
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My_Connections[Idx].wdatalen += out_len;
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zipbuf_used = WRITEBUFFER_LEN - out->avail_out;
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My_Connections[Idx].bytes_out += out_len;
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Log(LOG_DEBUG, "zipbuf_used: %d\n", zipbuf_used);
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My_Connections[Idx].zip.bytes_out += My_Connections[Idx].zip.wdatalen;
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if (!array_catb( &My_Connections[Idx].wbuf, (char*) zipbuf, zipbuf_used ))
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My_Connections[Idx].zip.wdatalen = 0;
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return false;
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My_Connections[Idx].bytes_out += zipbuf_used;
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My_Connections[Idx].zip.bytes_out += array_bytes(&My_Connections[Idx].zip.wbuf);
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array_trunc(&My_Connections[Idx].zip.wbuf);
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return true;
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return true;
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} /* Zip_Flush */
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} /* Zip_Flush */
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@ -144,20 +154,32 @@ Unzip_Buffer( CONN_ID Idx )
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* wird false geliefert, ansonsten true. Der Fall, dass keine
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* wird false geliefert, ansonsten true. Der Fall, dass keine
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* Daten mehr zu entpacken sind, ist _kein_ Fehler! */
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* Daten mehr zu entpacken sind, ist _kein_ Fehler! */
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int result, in_len, out_len;
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int result;
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unsigned char unzipbuf[READBUFFER_LEN];
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unsigned int unzipbuf_used = 0;
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unsigned int z_rdatalen;
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unsigned int in_len;
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z_stream *in;
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z_stream *in;
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assert( Idx > NONE );
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assert( Idx > NONE );
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if( My_Connections[Idx].zip.rdatalen <= 0 ) return true;
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z_rdatalen = array_bytes(&My_Connections[Idx].zip.rbuf);
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if (z_rdatalen == 0)
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return true;
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in = &My_Connections[Idx].zip.in;
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in = &My_Connections[Idx].zip.in;
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in->next_in = (void *)My_Connections[Idx].zip.rbuf;
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in->next_in = array_start(&My_Connections[Idx].zip.rbuf);
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in->avail_in = My_Connections[Idx].zip.rdatalen;
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assert(in->next_in);
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in->next_out = (void *)(My_Connections[Idx].rbuf + My_Connections[Idx].rdatalen);
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if (!in->next_in)
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in->avail_out = READBUFFER_LEN - My_Connections[Idx].rdatalen - 1;
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return false;
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in->avail_in = z_rdatalen;
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in->next_out = unzipbuf;
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in->avail_out = sizeof unzipbuf;
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Log(LOG_DEBUG, "in->avail_in %d, in->avail_out %d", in->avail_in, in->avail_out);
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result = inflate( in, Z_SYNC_FLUSH );
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result = inflate( in, Z_SYNC_FLUSH );
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if( result != Z_OK )
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if( result != Z_OK )
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{
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{
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@ -166,19 +188,20 @@ Unzip_Buffer( CONN_ID Idx )
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return false;
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return false;
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}
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}
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in_len = My_Connections[Idx].zip.rdatalen - in->avail_in;
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assert(z_rdatalen >= in->avail_in);
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out_len = READBUFFER_LEN - My_Connections[Idx].rdatalen - 1 - in->avail_out;
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in_len = z_rdatalen - in->avail_in;
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My_Connections[Idx].rdatalen += out_len;
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unzipbuf_used = READBUFFER_LEN - in->avail_out;
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Log(LOG_DEBUG, "unzipbuf_used: %d - %d = %d\n", READBUFFER_LEN, in->avail_out, unzipbuf_used);
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assert(unzipbuf_used <= READBUFFER_LEN);
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if (!array_catb(&My_Connections[Idx].rbuf, (char*) unzipbuf, unzipbuf_used))
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return false;
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if( in->avail_in > 0 )
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if( in->avail_in > 0 ) {
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{
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array_moveleft(&My_Connections[Idx].zip.rbuf, 1, in_len );
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/* es konnten nicht alle Daten entpackt werden, vermutlich war
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} else {
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* im Ziel-Puffer kein Platz mehr. Umkopieren ... */
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array_trunc( &My_Connections[Idx].zip.rbuf );
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My_Connections[Idx].zip.rdatalen -= in_len;
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My_Connections[Idx].zip.bytes_in += unzipbuf_used;
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memmove( My_Connections[Idx].zip.rbuf, My_Connections[Idx].zip.rbuf + in_len, My_Connections[Idx].zip.rdatalen );
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}
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}
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else My_Connections[Idx].zip.rdatalen = 0;
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My_Connections[Idx].zip.bytes_in += out_len;
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return true;
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return true;
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} /* Unzip_Buffer */
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} /* Unzip_Buffer */
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