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/*
* POSIX library for Lua 5.1, 5.2 & 5.3.
* (c) Gary V. Vaughan <gary@vaughan.pe>, 2013-2017
* (c) Reuben Thomas <rrt@sc3d.org> 2010-2013
* (c) Natanael Copa <natanael.copa@gmail.com> 2008-2010
* Clean up and bug fixes by Leo Razoumov <slonik.az@gmail.com> 2006-10-11
* Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br> 07 Apr 2006 23:17:49
* Based on original by Claudio Terra for Lua 3.x.
* With contributions by Roberto Ierusalimschy.
* With documentation from Steve Donovan 2012
*/
#ifndef LCURSES__HELPERS_C
#define LCURSES__HELPERS_C 1
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h> /* for _POSIX_VERSION */
#ifdef __NetBSD__
#include <curses.h>
#else
#include <ncurses.h>
#endif
#include <term.h>
#include "../lua.h"
#include "../lualib.h"
#include "../lauxlib.h"
#if LUA_VERSION_NUM < 503
# define lua_isinteger lua_isnumber
# if LUA_VERSION_NUM == 501
# include "compat-5.2.c"
# endif
#endif
#if LUA_VERSION_NUM == 502 || LUA_VERSION_NUM == 503
# define lua_objlen lua_rawlen
# define lua_strlen lua_rawlen
# define luaL_openlib(L,n,l,nup) luaL_setfuncs((L),(l),(nup))
# define luaL_register(L,n,l) (luaL_newlib(L,l))
#endif
#ifndef STREQ
# define STREQ(a, b) (strcmp (a, b) == 0)
#endif
/* Mark unused parameters required only to match a function type
specification. */
#ifdef __GNUC__
# define LCURSES_UNUSED(x) UNUSED_ ## x __attribute__((__unused__))
#else
# define LCURSES_UNUSED(x) UNUSED_ ## x
#endif
/* LCURSES_STMT_BEG/END are used to create macros that expand to a
single compound statement in a portable way. */
#if defined __GNUC__ && !defined __STRICT_ANSI__ && !defined __cplusplus
# define LCURSES_STMT_BEG (void)(
# define LCURSES_STMT_END )
#else
# if (defined sun || defined __sun__)
# define LCURSES_STMT_BEG if (1)
# define LCURSES_STMT_END else (void)0
# else
# define LCURSES_STMT_BEG do
# define LCURSES_STMT_END while (0)
# endif
#endif
/* The extra indirection to these macros is required so that if the
arguments are themselves macros, they will get expanded too. */
#define LCURSES__SPLICE(_s, _t) _s##_t
#define LCURSES_SPLICE(_s, _t) LCURSES__SPLICE(_s, _t)
#define LCURSES__STR(_s) #_s
#define LCURSES_STR(_s) LCURSES__STR(_s)
/* The +1 is to step over the leading '_' that is required to prevent
premature expansion of MENTRY arguments if we didn't add it. */
#define LCURSES__STR_1(_s) (#_s + 1)
#define LCURSES_STR_1(_s) LCURSES__STR_1(_s)
#define LCURSES_CONST(_f) LCURSES_STMT_BEG { \
lua_pushinteger(L, _f); \
lua_setfield(L, -2, #_f); \
} LCURSES_STMT_END
#define LCURSES_FUNC(_s) {LCURSES_STR_1(_s), (_s)}
#define pushokresult(b) pushboolresult((int) (b) == OK)
#ifndef errno
extern int errno;
#endif
/* ========================= *
* Bad argument diagnostics. *
* ========================= */
static int
argtypeerror(lua_State *L, int narg, const char *expected)
{
const char *got = luaL_typename(L, narg);
return luaL_argerror(L, narg,
lua_pushfstring(L, "%s expected, got %s", expected, got));
}
static lua_Integer
checkinteger(lua_State *L, int narg, const char *expected)
{
lua_Integer d = lua_tointeger(L, narg);
if (d == 0 && !lua_isinteger(L, narg))
argtypeerror(L, narg, expected);
return d;
}
static int
checkint(lua_State *L, int narg)
{
return (int)checkinteger(L, narg, "int");
}
static chtype
checkch(lua_State *L, int narg)
{
if (lua_isnumber(L, narg))
return (chtype)checkint(L, narg);
if (lua_isstring(L, narg))
return *lua_tostring(L, narg);
return argtypeerror(L, narg, "int or char");
}
static chtype
optch(lua_State *L, int narg, chtype def)
{
if (lua_isnoneornil(L, narg))
return def;
if (lua_isnumber(L, narg) || lua_isstring(L, narg))
return checkch(L, narg);
return argtypeerror(L, narg, "int or char or nil");
}
static int
optint(lua_State *L, int narg, lua_Integer def)
{
if (lua_isnoneornil(L, narg))
return (int) def;
return (int)checkinteger(L, narg, "int or nil");
}
#define pushboolresult(b) (lua_pushboolean(L, (b)), 1)
#define pushintresult(n) (lua_pushinteger(L, (n)), 1)
#define pushstringresult(s) (lua_pushstring(L, (s)), 1)
/* ================== *
* Utility functions. *
* ================== */
#define pushintegerfield(k,v) LCURSES_STMT_BEG { \
lua_pushinteger(L, (lua_Integer) v); lua_setfield(L, -2, k); \
} LCURSES_STMT_END
#define pushnumberfield(k,v) LCURSES_STMT_BEG { \
lua_pushnumber(L, (lua_Number) v); lua_setfield(L, -2, k); \
} LCURSES_STMT_END
#define pushstringfield(k,v) LCURSES_STMT_BEG { \
if (v) { \
lua_pushstring(L, (const char *) v); \
lua_setfield(L, -2, k); \
} \
} LCURSES_STMT_END
#define pushliteralfield(k,v) LCURSES_STMT_BEG { \
if (v) { \
lua_pushliteral(L, v); \
lua_setfield(L, -2, k); \
} \
} LCURSES_STMT_END
#define settypemetatable(t) LCURSES_STMT_BEG { \
if (luaL_newmetatable(L, t) == 1) \
pushliteralfield("_type", t); \
lua_setmetatable(L, -2); \
} LCURSES_STMT_END
#define setintegerfield(_p, _n) pushintegerfield(LCURSES_STR(_n), _p->_n)
#define setnumberfield(_p, _n) pushnumberfield(LCURSES_STR(_n), _p->_n)
#define setstringfield(_p, _n) pushstringfield(LCURSES_STR(_n), _p->_n)
#endif /*LCURSES__HELPERS_C*/
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