2 ** $Id: lzio.c,v 1.31.1.1 2007/12/27 13:02:25 roberto Exp $
3 ** a generic input stream interface
4 ** See Copyright Notice in lua.h
21 int luaZ_fill (ZIO *z) {
26 buff = z->reader(L, z->data, &size);
28 if (buff == NULL || size == 0) return EOZ;
31 return char2int(*(z->p++));
35 int luaZ_lookahead (ZIO *z) {
37 if (luaZ_fill(z) == EOZ)
40 z->n++; /* luaZ_fill removed first byte; put back it */
44 return char2int(*z->p);
48 void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
57 /* --------------------------------------------------------------- read --- */
58 size_t luaZ_read (ZIO *z, void *b, size_t n) {
61 if (luaZ_lookahead(z) == EOZ)
62 return n; /* return number of missing bytes */
63 m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
73 /* ------------------------------------------------------------------------ */
74 char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
75 if (n > buff->buffsize) {
76 if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
77 luaZ_resizebuffer(L, buff, n);