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diff --git a/util/compress.cpp b/util/compress.cpp
new file mode 100644
index 00000000..6953960a
--- /dev/null
+++ b/util/compress.cpp
@@ -0,0 +1,28 @@
+#include <allegro.h>
+#include "compress.h"
+#include "memory.h"
+#include "globals.h"
+
+namespace Compress{
+
+void testCompression(unsigned char * input, int length){
+ unsigned char * data = new unsigned char[length*2];
+ PACKFILE_VTABLE table = Memory::makeTable();
+ Memory::memory memory(data, length*2);
+ PACKFILE * pack = pack_fopen_vtable(&table, &memory);
+
+ LZSS_PACK_DATA * lzss = create_lzss_pack_data();
+ int r = lzss_write(pack, lzss, length, input, 1);
+ if (r != 0){
+ // printf("lzss error %d: %s!\n", r, ustrerror(errno));
+ exit(-1);
+ }
+ free_lzss_pack_data(lzss);
+ pack_fclose(pack);
+
+ Global::debug(0) << "Compressed " << length << " to " << memory.getSize() << " ratio is " << ((double)memory.getSize() / length) << std::endl;
+
+ delete[] data;
+}
+
+}
diff --git a/util/compress.h b/util/compress.h
new file mode 100644
index 00000000..1fe9ffde
--- /dev/null
+++ b/util/compress.h
@@ -0,0 +1,8 @@
+#ifndef _paintown_compress_h
+#define _paintown_compress_h
+
+namespace Compress{
+ void testCompression(unsigned char * data, int length);
+}
+
+#endif
diff --git a/util/memory.h b/util/memory.h
index b8aa783b..dd3fd2d2 100644
--- a/util/memory.h
+++ b/util/memory.h
@@ -1,121 +1,126 @@
#ifndef _paintown_3ac0ba2587944345f2241085269c24f8
#define _paintown_3ac0ba2587944345f2241085269c24f8
#include <allegro.h>
namespace Memory{
struct memory{
memory(unsigned char * stream, int length):
stream(stream),
position(stream),
length(length){
}
+
+ int getSize() const {
+ return position - stream;
+ }
+
/* points to the head */
unsigned char * stream;
/* points to the current position */
unsigned char * position;
int length;
};
static int pf_fclose(void *userdata){
return 0;
/* nothing */
}
static int pf_getc(void *userdata){
memory * m = (memory*) userdata;
if (m->position < m->stream + m->length){
unsigned char x = *m->position;
m->position += 1;
return x;
}
return EOF;
}
static int pf_ungetc(int c, void *userdata){
memory * m = (memory*) userdata;
if (m->position > m->stream){
m->position -= 1;
return c;
} else {
return EOF;
}
}
static long pf_fread(void *p, long n, void *userdata){
memory *m = (memory*) userdata;
unsigned char *cp = (unsigned char *)p;
long i;
int c;
for (i=0; i<n; i++) {
if ((c = pf_getc(m)) == EOF)
break;
*(cp++) = c;
}
return i;
}
static int pf_putc(int c, void *userdata){
memory * m = (memory*) userdata;
if (m->position < m->stream + m->length){
*m->position = c;
m->position += 1;
return c;
}
return EOF;
}
static long pf_fwrite(const void *p, long n, void *userdata){
memory *m = (memory*) userdata;
const unsigned char * cp = (const unsigned char *) p;
long i;
int c;
for (i=0; i<n; i++) {
if ((c = pf_putc(cp[i], userdata)) == EOF)
break;
}
return i;
}
static int pf_fseek(void *userdata, int offset){
memory * m = (memory*) userdata;
if (offset >= 0 && offset < m->length){
m->position = m->stream + offset;
return 0;
} else {
return -1;
}
}
static int pf_feof(void *userdata){
memory * m = (memory*) userdata;
return m->position >= m->stream + m->length;
}
static int pf_ferror(void *userdata){
memory * m = (memory*) userdata;
return m->position < m->stream || m->position >= m->stream + m->length;
}
static PACKFILE_VTABLE makeTable(){
PACKFILE_VTABLE table;
table.pf_fclose = Memory::pf_fclose;
table.pf_getc = Memory::pf_getc;
table.pf_ungetc = Memory::pf_ungetc;
table.pf_fread = Memory::pf_fread;
table.pf_putc = Memory::pf_putc;
table.pf_fwrite = Memory::pf_fwrite;
table.pf_fseek = Memory::pf_fseek;
table.pf_feof = Memory::pf_feof;
table.pf_ferror = Memory::pf_ferror;
return table;
}
}
#endif

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