2
** $Id: lzio.c,v 1.37 2015/09/08 15:41:05 roberto Exp $
4
** See Copyright Notice in lua.h
23
int luaZ_fill (ZIO *z) {
28
buff = z->reader(L, z->data, &size);
30
if (buff == NULL || size == 0)
32
z->n = size - 1; /* discount char being returned */
34
return cast_uchar(*(z->p++));
38
void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
47
/* --------------------------------------------------------------- read --- */
48
size_t luaZ_read (ZIO *z, void *b, size_t n) {
51
if (z->n == 0) { /* no bytes in buffer? */
52
if (luaZ_fill(z) == EOZ) /* try to read more */
53
return n; /* no more input; return number of missing bytes */
55
z->n++; /* luaZ_fill consumed first byte; put it back */
59
m = (n <= z->n) ? n : z->n; /* min. between n and z->n */