Update from 0.9.8 stable. Eliminate duplicate error codes.
[openssl.git] / crypto / comp / c_zlib.c
index 8263f73..941b807 100644 (file)
@@ -67,46 +67,25 @@ static COMP_METHOD zlib_stateful_method={
  * 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.
+ * and we do not link to a .LIB file when ZLIB_SHARED is set.
  */
 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
 # include <windows.h>
-
-# define Z_CALLCONV _stdcall
-# ifndef ZLIB_SHARED
-#  define ZLIB_SHARED
-# endif
-#else
-# define Z_CALLCONV
 #endif /* !(OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32) */
 
 #ifdef ZLIB_SHARED
 #include <openssl/dso.h>
 
-/* Prototypes for built in stubs */
-#if 0
-static int stub_compress(Bytef *dest,uLongf *destLen,
-       const Bytef *source, uLong sourceLen);
-#endif
-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);
-static int stub_deflateEnd(z_streamp strm);
-static int stub_deflate(z_streamp strm, int flush);
-static int stub_deflateInit_(z_streamp strm, int level,
-       const char * version, int stream_size);
-
 /* Function pointers */
-typedef int (Z_CALLCONV *compress_ft)(Bytef *dest,uLongf *destLen,
+typedef int (*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,
+typedef int (*inflateEnd_ft)(z_streamp strm);
+typedef int (*inflate_ft)(z_streamp strm, int flush);
+typedef int (*inflateInit__ft)(z_streamp strm,
        const char * version, int stream_size);
-typedef int (Z_CALLCONV *deflateEnd_ft)(z_streamp strm);
-typedef int (Z_CALLCONV *deflate_ft)(z_streamp strm, int flush);
-typedef int (Z_CALLCONV *deflateInit__ft)(z_streamp strm, int level,
+typedef int (*deflateEnd_ft)(z_streamp strm);
+typedef int (*deflate_ft)(z_streamp strm, int flush);
+typedef int (*deflateInit__ft)(z_streamp strm, int level,
        const char * version, int stream_size);
 static compress_ft     p_compress=NULL;
 static inflateEnd_ft   p_inflateEnd=NULL;
@@ -119,13 +98,13 @@ static deflateInit__ft     p_deflateInit_=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_
-#define deflateEnd              stub_deflateEnd
-#define deflate                 stub_deflate
-#define deflateInit_            stub_deflateInit_
+#define compress                p_compress
+#define inflateEnd              p_inflateEnd
+#define inflate                 p_inflate
+#define inflateInit_            p_inflateInit_
+#define deflateEnd              p_deflateEnd
+#define deflate                 p_deflate
+#define deflateInit_            p_deflateInit_
 #endif /* ZLIB_SHARED */
 
 struct zlib_state
@@ -361,16 +340,6 @@ COMP_METHOD *COMP_zlib(void)
                {
 #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
@@ -397,84 +366,22 @@ COMP_METHOD *COMP_zlib(void)
                        p_deflateInit_
                                = (deflateInit__ft) DSO_bind_func(zlib_dso,
                                        "deflateInit_");
-                       zlib_loaded++;
+
+                       if (p_compress && p_inflateEnd && p_inflate
+                               && p_inflateInit_ && p_deflateEnd
+                               && p_deflate && p_deflateInit_)
+                               zlib_loaded++;
                        }
                }
 
 #endif
+#ifdef ZLIB_SHARED
+       if (zlib_loaded)
+#endif
 #if defined(ZLIB) || defined(ZLIB_SHARED)
-       meth = &zlib_stateful_method;
+               meth = &zlib_stateful_method;
 #endif
 
        return(meth);
        }
 
-#ifdef ZLIB_SHARED
-#if 0
-/* 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);
-       }
-#endif
-
-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);
-       }
-
-static int
-stub_deflateEnd(z_streamp strm)
-       {
-       if ( p_deflateEnd )
-               return(p_deflateEnd(strm));
-       else
-               return(Z_MEM_ERROR);
-       }
-
-static int
-stub_deflate(z_streamp strm, int flush)
-       {
-       if ( p_deflate )
-               return(p_deflate(strm,flush));
-       else
-               return(Z_MEM_ERROR);
-       }
-
-static int
-stub_deflateInit_(z_streamp strm, int level,
-       const char * version, int stream_size)
-       {
-       if ( p_deflateInit_ )
-               return(p_deflateInit_(strm,level,version,stream_size));
-       else
-               return(Z_MEM_ERROR);
-       }
-
-#endif /* ZLIB_SHARED */