static void io_file_readall(lua_State *L, FILE *fp)
{
MSize m, n;
for (m = LUAL_BUFFERSIZE, n = 0; ; m += m) {
char *buf = lj_str_needbuf(L, &G(L)->tmpbuf, m);
n += (MSize)fread(buf+n, 1, m-n, fp);
if (n != m) {
setstrV(L, L->top++, lj_str_new(L, buf, (size_t)n));
lj_gc_check(L);
return;
}
}
}
LUA_API int lua_loadx(lua_State *L, lua_Reader reader, void *data,
const char *chunkname, const char *mode)
{
LexState ls;
int status;
ls.rfunc = reader;
ls.rdata = data;
ls.chunkarg = chunkname ? chunkname : "?";
ls.mode = mode;
lj_str_initbuf(&ls.sb);
status = lj_vm_cpcall(L, NULL, &ls, cpparser);
lj_lex_cleanup(L, &ls);
lj_gc_check(L);
return status;
}
static int io_file_readlen(lua_State *L, FILE *fp, MSize m)
{
if (m) {
char *buf = lj_str_needbuf(L, &G(L)->tmpbuf, m);
MSize n = (MSize)fread(buf, 1, m, fp);
setstrV(L, L->top++, lj_str_new(L, buf, (size_t)n));
lj_gc_check(L);
return (n > 0 || m == 0);
} else {
int c = getc(fp);
ungetc(c, fp);
setstrV(L, L->top++, &G(L)->strempty);
return (c != EOF);
}
}
static int io_file_readline(lua_State *L, FILE *fp, MSize chop)
{
MSize m = LUAL_BUFFERSIZE, n = 0, ok = 0;
char *buf;
for (;;) {
buf = lj_str_needbuf(L, &G(L)->tmpbuf, m);
if (fgets(buf+n, m-n, fp) == NULL) break;
n += (MSize)strlen(buf+n);
ok |= n;
if (n && buf[n-1] == '\n') { n -= chop; break; }
if (n >= m - 64) m += m;
}
setstrV(L, L->top++, lj_str_new(L, buf, (size_t)n));
lj_gc_check(L);
return (int)ok;
}
void *
luaL_pushcdata(struct lua_State *L, uint32_t ctypeid)
{
/*
* ctypeid is actually has CTypeID type.
* CTypeId is defined somewhere inside luajit's internal
* headers.
*/
assert(sizeof(ctypeid) == sizeof(CTypeID));
/* Code below is based on ffi_new() from luajit/src/lib_ffi.c */
/* Get information about ctype */
CTSize size;
CTState *cts = ctype_cts(L);
CTInfo info = lj_ctype_info(cts, ctypeid, &size);
/* Only numbers and pointers are implemented */
assert(ctype_isnum(info) || ctype_isptr(info));
(void) info;
assert(size != CTSIZE_INVALID);
/* Allocate a new cdata */
GCcdata *cd = lj_cdata_new(cts, ctypeid, size);
/* Anchor the uninitialized cdata with the stack. */
TValue *o = L->top;
setcdataV(L, o, cd);
incr_top(L);
/*
* lj_cconv_ct_init is omitted because it actually does memset()
* Caveats: cdata memory is returned uninitialized
*/
/*
* __gc is omitted because it is only needed for structs.
* Caveats: struct are not supported by this function.
* Please set finalizer using luaL_setcdatagc() if you need.
*/
lj_gc_check(L);
return cdataptr(cd);
}
