--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/objects.h>
+#include <openssl/comp.h>
+#include <openssl/err.h>
+
+COMP_METHOD *COMP_zlib(void );
+
+static COMP_METHOD zlib_method_nozlib={
+ NID_undef,
+ "(undef)",
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ };
+
+#ifndef ZLIB
+#undef ZLIB_SHARED
+#else
+
+#include <zlib.h>
+
+static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in, unsigned int ilen);
+static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in, unsigned int ilen);
+
+static int zz_uncompress(Bytef *dest, uLongf *destLen, const Bytef *source,
+ uLong sourceLen);
+
+static COMP_METHOD zlib_method={
+ NID_zlib_compression,
+ LN_zlib_compression,
+ NULL,
+ NULL,
+ zlib_compress_block,
+ zlib_expand_block,
+ NULL,
+ NULL,
+ };
+
+/*
+ * When OpenSSL is built on Windows, we do not want to require that
+ * the ZLIB.DLL be available in order for the OpenSSL DLLs to
+ * work. Therefore, all ZLIB routines are loaded at run time
+ * and we do not link to a .LIB file.
+ */
+#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
+# include <windows.h>
+
+# define Z_CALLCONV _stdcall
+# define ZLIB_SHARED
+#else
+# define Z_CALLCONV
+#endif /* !(OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32) */
+
+#ifdef ZLIB_SHARED
+#include <openssl/dso.h>
+
+/* Prototypes for built in stubs */
+static int stub_compress(Bytef *dest,uLongf *destLen,
+ const Bytef *source, uLong sourceLen);
+static int stub_inflateEnd(z_streamp strm);
+static int stub_inflate(z_streamp strm, int flush);
+static int stub_inflateInit_(z_streamp strm, const char * version,
+ int stream_size);
+
+/* Function pointers */
+typedef int (Z_CALLCONV *compress_ft)(Bytef *dest,uLongf *destLen,
+ const Bytef *source, uLong sourceLen);
+typedef int (Z_CALLCONV *inflateEnd_ft)(z_streamp strm);
+typedef int (Z_CALLCONV *inflate_ft)(z_streamp strm, int flush);
+typedef int (Z_CALLCONV *inflateInit__ft)(z_streamp strm,
+ const char * version, int stream_size);
+static compress_ft p_compress=NULL;
+static inflateEnd_ft p_inflateEnd=NULL;
+static inflate_ft p_inflate=NULL;
+static inflateInit__ft p_inflateInit_=NULL;
+
+static int zlib_loaded = 0; /* only attempt to init func pts once */
+static DSO *zlib_dso = NULL;
+
+#define compress stub_compress
+#define inflateEnd stub_inflateEnd
+#define inflate stub_inflate
+#define inflateInit_ stub_inflateInit_
+#endif /* ZLIB_SHARED */
+
+static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in, unsigned int ilen)
+ {
+ unsigned long l;
+ int i;
+ int clear=1;
+
+ if (ilen > 128)
+ {
+ out[0]=1;
+ l=olen-1;
+ i=compress(&(out[1]),&l,in,(unsigned long)ilen);
+ if (i != Z_OK)
+ return(-1);
+ if (ilen > l)
+ {
+ clear=0;
+ l++;
+ }
+ }
+ if (clear)
+ {
+ out[0]=0;
+ memcpy(&(out[1]),in,ilen);
+ l=ilen+1;
+ }
+#ifdef DEBUG_ZLIB
+ fprintf(stderr,"compress(%4d)->%4d %s\n",
+ ilen,(int)l,(clear)?"clear":"zlib");
+#endif
+ return((int)l);
+ }
+
+static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in, unsigned int ilen)
+ {
+ unsigned long l;
+ int i;
+
+ if (in[0])
+ {
+ l=olen;
+ i=zz_uncompress(out,&l,&(in[1]),(unsigned long)ilen-1);
+ if (i != Z_OK)
+ return(-1);
+ }
+ else
+ {
+ memcpy(out,&(in[1]),ilen-1);
+ l=ilen-1;
+ }
+#ifdef DEBUG_ZLIB
+ fprintf(stderr,"expand (%4d)->%4d %s\n",
+ ilen,(int)l,in[0]?"zlib":"clear");
+#endif
+ return((int)l);
+ }
+
+static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source,
+ uLong sourceLen)
+{
+ z_stream stream;
+ int err;
+
+ stream.next_in = (Bytef*)source;
+ stream.avail_in = (uInt)sourceLen;
+ /* Check for source > 64K on 16-bit machine: */
+ if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+
+ stream.next_out = dest;
+ stream.avail_out = (uInt)*destLen;
+ if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+ stream.zalloc = (alloc_func)0;
+ stream.zfree = (free_func)0;
+
+ err = inflateInit(&stream);
+ if (err != Z_OK) return err;
+
+ err = inflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ inflateEnd(&stream);
+ return err;
+ }
+ *destLen = stream.total_out;
+
+ err = inflateEnd(&stream);
+ return err;
+}
+
+#endif
+
+COMP_METHOD *COMP_zlib(void)
+ {
+ COMP_METHOD *meth = &zlib_method_nozlib;
+
+#ifdef ZLIB_SHARED
+ if (!zlib_loaded)
+ {
+#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
+ zlib_dso = DSO_load(NULL, "ZLIB1", NULL, 0);
+ if (!zlib_dso)
+ {
+ zlib_dso = DSO_load(NULL, "ZLIB", NULL, 0);
+ if (zlib_dso)
+ {
+ /* Clear the errors from the first failed
+ DSO_load() */
+ ERR_clear_error();
+ }
+ }
+#else
+ zlib_dso = DSO_load(NULL, "z", NULL, 0);
+#endif
+ if (zlib_dso != NULL)
+ {
+ p_compress
+ = (compress_ft) DSO_bind_func(zlib_dso,
+ "compress");
+ p_inflateEnd
+ = (inflateEnd_ft) DSO_bind_func(zlib_dso,
+ "inflateEnd");
+ p_inflate
+ = (inflate_ft) DSO_bind_func(zlib_dso,
+ "inflate");
+ p_inflateInit_
+ = (inflateInit__ft) DSO_bind_func(zlib_dso,
+ "inflateInit_");
+ zlib_loaded++;
+ }
+ }
+
+#endif
+#if defined(ZLIB) || defined(ZLIB_SHARED)
+ meth = &zlib_method;
+#endif
+
+ return(meth);
+ }
+
+#ifdef ZLIB_SHARED
+/* Stubs for each function to be dynamicly loaded */
+static int
+stub_compress(Bytef *dest,uLongf *destLen,const Bytef *source, uLong sourceLen)
+ {
+ if (p_compress)
+ return(p_compress(dest,destLen,source,sourceLen));
+ else
+ return(Z_MEM_ERROR);
+ }
+
+static int
+stub_inflateEnd(z_streamp strm)
+ {
+ if ( p_inflateEnd )
+ return(p_inflateEnd(strm));
+ else
+ return(Z_MEM_ERROR);
+ }
+
+static int
+stub_inflate(z_streamp strm, int flush)
+ {
+ if ( p_inflate )
+ return(p_inflate(strm,flush));
+ else
+ return(Z_MEM_ERROR);
+ }
+
+static int
+stub_inflateInit_(z_streamp strm, const char * version, int stream_size)
+ {
+ if ( p_inflateInit_ )
+ return(p_inflateInit_(strm,version,stream_size));
+ else
+ return(Z_MEM_ERROR);
+ }
+
+#endif /* ZLIB_SHARED */
projects / bcm963xx.git / blobdiff