Commit FS#9174: Lua scripting language by Dan Everton

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21020 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 67 insertions, 0 deletions

diff --git a/apps/plugins/lua/lzio.h b/apps/plugins/lua/lzio.h
new file mode 100644
index 0000000000..9aa9e4b537
--- /dev/null
+++ b/apps/plugins/lua/lzio.h
@@ -0,0 +1,67 @@
+/*
+** $Id$
+** Buffered streams
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lzio_h
+#define lzio_h
+
+#include "lua.h"
+
+#include "lmem.h"
+
+
+#define EOZ     (-1)                    /* end of stream */
+
+typedef struct Zio ZIO;
+
+#define char2int(c)     cast(int, cast(unsigned char, (c)))
+
+#define zgetc(z)  (((z)->n--)>0 ?  char2int(*(z)->p++) : luaZ_fill(z))
+
+typedef struct Mbuffer {
+  char *buffer;
+  size_t n;
+  size_t buffsize;
+} Mbuffer;
+
+#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
+
+#define luaZ_buffer(buff)       ((buff)->buffer)
+#define luaZ_sizebuffer(buff)   ((buff)->buffsize)
+#define luaZ_bufflen(buff)      ((buff)->n)
+
+#define luaZ_resetbuffer(buff) ((buff)->n = 0)
+
+
+#define luaZ_resizebuffer(L, buff, size) \
+        (luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
+        (buff)->buffsize = size)
+
+#define luaZ_freebuffer(L, buff)        luaZ_resizebuffer(L, buff, 0)
+
+
+LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
+LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
+                                        void *data);
+LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
+LUAI_FUNC int luaZ_lookahead (ZIO *z);
+
+
+
+/* --------- Private Part ------------------ */
+
+struct Zio {
+  size_t n;                     /* bytes still unread */
+  const char *p;                /* current position in buffer */
+  lua_Reader reader;
+  void* data;                   /* additional data */
+  lua_State *L;                 /* Lua state (for reader) */
+};
+
+
+LUAI_FUNC int luaZ_fill (ZIO *z);
+
+#endif