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/*
* LSPIPAT - LUA SPIPAT WRAPPER
* Copyright (C) 2010, Robin Haberkorn
* License: LGPL
*
* CORE: UNSIGNED INTEGER PRIMITIVES/CONSTRUCTORS
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "lspipat.h"
static unsigned
uintFncHandler(void *global __attribute__((unused)), void *local)
{
struct simplefncRefs *simplefnc = local;
lua_State *L = simplefnc->cb.L;
int val;
lua_rawgeti(L, LUA_REGISTRYINDEX, simplefnc->cb.function);
lua_rawgeti(L, LUA_REGISTRYINDEX, simplefnc->cb.cookie);
#if 0
lua_rawgeti(L, LUA_REGISTRYINDEX, *(int *)global);
#endif
lua_call(L, 1, 1);
if (lua_isnil(L, -1)) {
lua_pop(L, 1);
return 0; /* default value */
}
if (!lua_isnumber(L, -1)) {
lua_pop(L, 1);
L_ERROR(L_RETURN); /* FIXME: is it safe to raise errors? */
}
val = lua_tointeger(L, -1);
lua_pop(L, 1);
if (val < 0)
L_ERROR(L_RETURN);
return (unsigned)val;
}
struct uintPrimitive {
struct pat *(*uint)(unsigned);
struct pat *(*fnc)(unsigned (*)(void *, void *), void *);
};
static int
genericUIntPrimitive(lua_State *L, struct uintPrimitive spipat)
{
int top = lua_gettop(L);
PATTERN_WRAPPER *new;
if (!(new = lua_newuserdata(L, sizeof(PATTERN_WRAPPER))))
L_ERROR(L_ALLOC);
memset(new, 0, sizeof(PATTERN_WRAPPER));
switch (lua_type(L, 1)) {
case LUA_TNONE:
case LUA_TNIL:
case LUA_TNUMBER:
case LUA_TSTRING: {
int val;
luaL_argcheck(L, top < 2, top, L_NUMBER);
val = luaL_optint(L, 1, 0);
luaL_argcheck(L, val >= 0, 1, L_VALUE);
new->pattern = spipat.uint((unsigned)val);
break;
}
case LUA_TFUNCTION: {
struct simplefncRefs *simplefnc;
luaL_argcheck(L, top == 1 || top == 2, top, L_NUMBER);
lua_insert(L, 1); /* move wrapper to bottom */
if (top == 1)
lua_pushnil(L); /* cookie will be LUA_REFNIL */
new->type = PATTERN_SIMPLEFNC;
simplefnc = &new->u.simplefnc;
simplefnc->cb.L = L;
simplefnc->cb.cookie = luaL_ref(L, LUA_REGISTRYINDEX);
simplefnc->cb.function = luaL_ref(L, LUA_REGISTRYINDEX);
/* wrapper at top again */
new->pattern = spipat.fnc(uintFncHandler, simplefnc);
break;
}
default:
return luaL_argerror(L, 1, L_TYPE);
}
if (!new->pattern)
L_ERROR(L_ALLOC);
luaL_getmetatable(L, PATTERN_MT);
lua_setmetatable(L, -2);
return 1;
}
#define STDUINTPRIM(LFNC, SPIFNC) \
LUA_SIG(LFNC) \
{ \
return genericUIntPrimitive(L, (struct uintPrimitive) { \
.uint = SPIFNC, \
.fnc = SPIFNC##_fnc \
}); \
}
STDUINTPRIM(l_primitive_len, spipat_len)
STDUINTPRIM(l_primitive_pos, spipat_pos)
STDUINTPRIM(l_primitive_rpos, spipat_rpos)
STDUINTPRIM(l_primitive_rtab, spipat_rtab)
STDUINTPRIM(l_primitive_tab, spipat_tab)
#undef STDUINTPRIM
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