Move file_archive_inflate_init to file_archive_zlib

libretro-common/file/file_archive.c

@@ -423,17 +423,6 @@ void zlib_deflate_init(void *data, int level)
       deflateInit(stream, level);
 }
 
-bool file_archive_inflate_init(void *data)
-{
-   z_stream *stream = (z_stream*)data;
-
-   if (!stream)
-      return false;
-   if (inflateInit(stream) != Z_OK)
-      return false;
-   return true;
-}
-
 bool file_archive_inflate_data_to_file_init(
       zlib_file_handle_t *handle,
       const uint8_t *cdata,  uint32_t csize, uint32_t size)

libretro-common/file/file_archive_zlib.c

@@ -99,6 +99,17 @@ static int zlib_stream_compress_data_to_file(void *data)
    return 0;
 }
 
+static bool zlib_stream_decompress_init(void *data)
+{
+   z_stream *stream = (z_stream*)data;
+
+   if (!stream)
+      return false;
+   if (inflateInit(stream) != Z_OK)
+      return false;
+   return true;
+}
+
 const struct zlib_file_backend zlib_backend = {
    zlib_stream_new,
    zlib_stream_free,
@@ -106,6 +117,7 @@ const struct zlib_file_backend zlib_backend = {
    zlib_stream_get_avail_out,
    zlib_stream_get_total_out,
    zlib_stream_decrement_total_out,
+   zlib_stream_decompress_init,
    zlib_stream_compress_free,
    zlib_stream_compress_data_to_file,
    "zlib"

libretro-common/formats/png/rpng.c

@@ -791,7 +791,7 @@ static bool rpng_load_image_argb_process_init(rpng_t *rpng,
    if (!rpng->process.stream)
       return false;
 
-   if (!file_archive_inflate_init(rpng->process.stream))
+   if (!rpng->process.stream_backend->stream_decompress_init(rpng->process.stream))
       return false;
 
    rpng->process.inflate_buf = (uint8_t*)malloc(rpng->process.inflate_buf_size);

libretro-common/include/file/file_archive.h

@@ -45,6 +45,7 @@ struct zlib_file_backend
    uint32_t (*stream_get_avail_out)(void*);
    uint64_t (*stream_get_total_out)(void*);
    void     (*stream_decrement_total_out)(void *, unsigned);
+   bool     (*stream_decompress_init)(void *);
    void     (*stream_compress_free)(void *);
    int      (*stream_compress_data_to_file)(void *);
    const char *ident;
@@ -162,8 +163,6 @@ struct string_list *compressed_file_list_new(const char *filename,
 
 void zlib_deflate_init(void *data, int level);
 
-bool file_archive_inflate_init(void *data);
-
 void zlib_set_stream(void *data,
       uint32_t       avail_in,
       uint32_t       avail_out,