From ba4e59a1d687173ac5cfa74d26d71d6059dc6bc6 Mon Sep 17 00:00:00 2001 From: Alex Auvolat Date: Fri, 15 Jul 2016 22:45:41 +0200 Subject: Move stuff around --- src/lib/lua/lbaselib.c | 498 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 498 insertions(+) create mode 100644 src/lib/lua/lbaselib.c (limited to 'src/lib/lua/lbaselib.c') diff --git a/src/lib/lua/lbaselib.c b/src/lib/lua/lbaselib.c new file mode 100644 index 0000000..d481c4e --- /dev/null +++ b/src/lib/lua/lbaselib.c @@ -0,0 +1,498 @@ +/* +** $Id: lbaselib.c,v 1.313 2016/04/11 19:18:40 roberto Exp $ +** Basic library +** See Copyright Notice in lua.h +*/ + +#define lbaselib_c +#define LUA_LIB + +#include "lprefix.h" + + +#include +#include +#include +#include + +#include "lua.h" + +#include "lauxlib.h" +#include "lualib.h" + + +static int luaB_print (lua_State *L) { + int n = lua_gettop(L); /* number of arguments */ + int i; + lua_getglobal(L, "tostring"); + for (i=1; i<=n; i++) { + const char *s; + size_t l; + lua_pushvalue(L, -1); /* function to be called */ + lua_pushvalue(L, i); /* value to print */ + lua_call(L, 1, 1); + s = lua_tolstring(L, -1, &l); /* get result */ + if (s == NULL) + return luaL_error(L, "'tostring' must return a string to 'print'"); + if (i>1) lua_writestring("\t", 1); + lua_writestring(s, l); + lua_pop(L, 1); /* pop result */ + } + lua_writeline(); + return 0; +} + + +#define SPACECHARS " \f\n\r\t\v" + +static const char *b_str2int (const char *s, int base, lua_Integer *pn) { + lua_Unsigned n = 0; + int neg = 0; + s += strspn(s, SPACECHARS); /* skip initial spaces */ + if (*s == '-') { s++; neg = 1; } /* handle signal */ + else if (*s == '+') s++; + if (!isalnum((unsigned char)*s)) /* no digit? */ + return NULL; + do { + int digit = (isdigit((unsigned char)*s)) ? *s - '0' + : (toupper((unsigned char)*s) - 'A') + 10; + if (digit >= base) return NULL; /* invalid numeral */ + n = n * base + digit; + s++; + } while (isalnum((unsigned char)*s)); + s += strspn(s, SPACECHARS); /* skip trailing spaces */ + *pn = (lua_Integer)((neg) ? (0u - n) : n); + return s; +} + + +static int luaB_tonumber (lua_State *L) { + if (lua_isnoneornil(L, 2)) { /* standard conversion? */ + luaL_checkany(L, 1); + if (lua_type(L, 1) == LUA_TNUMBER) { /* already a number? */ + lua_settop(L, 1); /* yes; return it */ + return 1; + } + else { + size_t l; + const char *s = lua_tolstring(L, 1, &l); + if (s != NULL && lua_stringtonumber(L, s) == l + 1) + return 1; /* successful conversion to number */ + /* else not a number */ + } + } + else { + size_t l; + const char *s; + lua_Integer n = 0; /* to avoid warnings */ + lua_Integer base = luaL_checkinteger(L, 2); + luaL_checktype(L, 1, LUA_TSTRING); /* no numbers as strings */ + s = lua_tolstring(L, 1, &l); + luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range"); + if (b_str2int(s, (int)base, &n) == s + l) { + lua_pushinteger(L, n); + return 1; + } /* else not a number */ + } /* else not a number */ + lua_pushnil(L); /* not a number */ + return 1; +} + + +static int luaB_error (lua_State *L) { + int level = (int)luaL_optinteger(L, 2, 1); + lua_settop(L, 1); + if (lua_type(L, 1) == LUA_TSTRING && level > 0) { + luaL_where(L, level); /* add extra information */ + lua_pushvalue(L, 1); + lua_concat(L, 2); + } + return lua_error(L); +} + + +static int luaB_getmetatable (lua_State *L) { + luaL_checkany(L, 1); + if (!lua_getmetatable(L, 1)) { + lua_pushnil(L); + return 1; /* no metatable */ + } + luaL_getmetafield(L, 1, "__metatable"); + return 1; /* returns either __metatable field (if present) or metatable */ +} + + +static int luaB_setmetatable (lua_State *L) { + int t = lua_type(L, 2); + luaL_checktype(L, 1, LUA_TTABLE); + luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2, + "nil or table expected"); + if (luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL) + return luaL_error(L, "cannot change a protected metatable"); + lua_settop(L, 2); + lua_setmetatable(L, 1); + return 1; +} + + +static int luaB_rawequal (lua_State *L) { + luaL_checkany(L, 1); + luaL_checkany(L, 2); + lua_pushboolean(L, lua_rawequal(L, 1, 2)); + return 1; +} + + +static int luaB_rawlen (lua_State *L) { + int t = lua_type(L, 1); + luaL_argcheck(L, t == LUA_TTABLE || t == LUA_TSTRING, 1, + "table or string expected"); + lua_pushinteger(L, lua_rawlen(L, 1)); + return 1; +} + + +static int luaB_rawget (lua_State *L) { + luaL_checktype(L, 1, LUA_TTABLE); + luaL_checkany(L, 2); + lua_settop(L, 2); + lua_rawget(L, 1); + return 1; +} + +static int luaB_rawset (lua_State *L) { + luaL_checktype(L, 1, LUA_TTABLE); + luaL_checkany(L, 2); + luaL_checkany(L, 3); + lua_settop(L, 3); + lua_rawset(L, 1); + return 1; +} + + +static int luaB_collectgarbage (lua_State *L) { + static const char *const opts[] = {"stop", "restart", "collect", + "count", "step", "setpause", "setstepmul", + "isrunning", NULL}; + static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT, + LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL, + LUA_GCISRUNNING}; + int o = optsnum[luaL_checkoption(L, 1, "collect", opts)]; + int ex = (int)luaL_optinteger(L, 2, 0); + int res = lua_gc(L, o, ex); + switch (o) { + case LUA_GCCOUNT: { + int b = lua_gc(L, LUA_GCCOUNTB, 0); + lua_pushnumber(L, (lua_Number)res + ((lua_Number)b/1024)); + return 1; + } + case LUA_GCSTEP: case LUA_GCISRUNNING: { + lua_pushboolean(L, res); + return 1; + } + default: { + lua_pushinteger(L, res); + return 1; + } + } +} + + +static int luaB_type (lua_State *L) { + int t = lua_type(L, 1); + luaL_argcheck(L, t != LUA_TNONE, 1, "value expected"); + lua_pushstring(L, lua_typename(L, t)); + return 1; +} + + +static int pairsmeta (lua_State *L, const char *method, int iszero, + lua_CFunction iter) { + if (luaL_getmetafield(L, 1, method) == LUA_TNIL) { /* no metamethod? */ + luaL_checktype(L, 1, LUA_TTABLE); /* argument must be a table */ + lua_pushcfunction(L, iter); /* will return generator, */ + lua_pushvalue(L, 1); /* state, */ + if (iszero) lua_pushinteger(L, 0); /* and initial value */ + else lua_pushnil(L); + } + else { + lua_pushvalue(L, 1); /* argument 'self' to metamethod */ + lua_call(L, 1, 3); /* get 3 values from metamethod */ + } + return 3; +} + + +static int luaB_next (lua_State *L) { + luaL_checktype(L, 1, LUA_TTABLE); + lua_settop(L, 2); /* create a 2nd argument if there isn't one */ + if (lua_next(L, 1)) + return 2; + else { + lua_pushnil(L); + return 1; + } +} + + +static int luaB_pairs (lua_State *L) { + return pairsmeta(L, "__pairs", 0, luaB_next); +} + + +/* +** Traversal function for 'ipairs' +*/ +static int ipairsaux (lua_State *L) { + lua_Integer i = luaL_checkinteger(L, 2) + 1; + lua_pushinteger(L, i); + return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2; +} + + +/* +** 'ipairs' function. Returns 'ipairsaux', given "table", 0. +** (The given "table" may not be a table.) +*/ +static int luaB_ipairs (lua_State *L) { +#if defined(LUA_COMPAT_IPAIRS) + return pairsmeta(L, "__ipairs", 1, ipairsaux); +#else + luaL_checkany(L, 1); + lua_pushcfunction(L, ipairsaux); /* iteration function */ + lua_pushvalue(L, 1); /* state */ + lua_pushinteger(L, 0); /* initial value */ + return 3; +#endif +} + + +static int load_aux (lua_State *L, int status, int envidx) { + if (status == LUA_OK) { + if (envidx != 0) { /* 'env' parameter? */ + lua_pushvalue(L, envidx); /* environment for loaded function */ + if (!lua_setupvalue(L, -2, 1)) /* set it as 1st upvalue */ + lua_pop(L, 1); /* remove 'env' if not used by previous call */ + } + return 1; + } + else { /* error (message is on top of the stack) */ + lua_pushnil(L); + lua_insert(L, -2); /* put before error message */ + return 2; /* return nil plus error message */ + } +} + + +static int luaB_loadfile (lua_State *L) { + const char *fname = luaL_optstring(L, 1, NULL); + const char *mode = luaL_optstring(L, 2, NULL); + int env = (!lua_isnone(L, 3) ? 3 : 0); /* 'env' index or 0 if no 'env' */ + int status = luaL_loadfilex(L, fname, mode); + return load_aux(L, status, env); +} + + +/* +** {====================================================== +** Generic Read function +** ======================================================= +*/ + + +/* +** reserved slot, above all arguments, to hold a copy of the returned +** string to avoid it being collected while parsed. 'load' has four +** optional arguments (chunk, source name, mode, and environment). +*/ +#define RESERVEDSLOT 5 + + +/* +** Reader for generic 'load' function: 'lua_load' uses the +** stack for internal stuff, so the reader cannot change the +** stack top. Instead, it keeps its resulting string in a +** reserved slot inside the stack. +*/ +static const char *generic_reader (lua_State *L, void *ud, size_t *size) { + (void)(ud); /* not used */ + luaL_checkstack(L, 2, "too many nested functions"); + lua_pushvalue(L, 1); /* get function */ + lua_call(L, 0, 1); /* call it */ + if (lua_isnil(L, -1)) { + lua_pop(L, 1); /* pop result */ + *size = 0; + return NULL; + } + else if (!lua_isstring(L, -1)) + luaL_error(L, "reader function must return a string"); + lua_replace(L, RESERVEDSLOT); /* save string in reserved slot */ + return lua_tolstring(L, RESERVEDSLOT, size); +} + + +static int luaB_load (lua_State *L) { + int status; + size_t l; + const char *s = lua_tolstring(L, 1, &l); + const char *mode = luaL_optstring(L, 3, "bt"); + int env = (!lua_isnone(L, 4) ? 4 : 0); /* 'env' index or 0 if no 'env' */ + if (s != NULL) { /* loading a string? */ + const char *chunkname = luaL_optstring(L, 2, s); + status = luaL_loadbufferx(L, s, l, chunkname, mode); + } + else { /* loading from a reader function */ + const char *chunkname = luaL_optstring(L, 2, "=(load)"); + luaL_checktype(L, 1, LUA_TFUNCTION); + lua_settop(L, RESERVEDSLOT); /* create reserved slot */ + status = lua_load(L, generic_reader, NULL, chunkname, mode); + } + return load_aux(L, status, env); +} + +/* }====================================================== */ + + +static int dofilecont (lua_State *L, int d1, lua_KContext d2) { + (void)d1; (void)d2; /* only to match 'lua_Kfunction' prototype */ + return lua_gettop(L) - 1; +} + + +static int luaB_dofile (lua_State *L) { + const char *fname = luaL_optstring(L, 1, NULL); + lua_settop(L, 1); + if (luaL_loadfile(L, fname) != LUA_OK) + return lua_error(L); + lua_callk(L, 0, LUA_MULTRET, 0, dofilecont); + return dofilecont(L, 0, 0); +} + + +static int luaB_assert (lua_State *L) { + if (lua_toboolean(L, 1)) /* condition is true? */ + return lua_gettop(L); /* return all arguments */ + else { /* error */ + luaL_checkany(L, 1); /* there must be a condition */ + lua_remove(L, 1); /* remove it */ + lua_pushliteral(L, "assertion failed!"); /* default message */ + lua_settop(L, 1); /* leave only message (default if no other one) */ + return luaB_error(L); /* call 'error' */ + } +} + + +static int luaB_select (lua_State *L) { + int n = lua_gettop(L); + if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') { + lua_pushinteger(L, n-1); + return 1; + } + else { + lua_Integer i = luaL_checkinteger(L, 1); + if (i < 0) i = n + i; + else if (i > n) i = n; + luaL_argcheck(L, 1 <= i, 1, "index out of range"); + return n - (int)i; + } +} + + +/* +** Continuation function for 'pcall' and 'xpcall'. Both functions +** already pushed a 'true' before doing the call, so in case of success +** 'finishpcall' only has to return everything in the stack minus +** 'extra' values (where 'extra' is exactly the number of items to be +** ignored). +*/ +static int finishpcall (lua_State *L, int status, lua_KContext extra) { + if (status != LUA_OK && status != LUA_YIELD) { /* error? */ + lua_pushboolean(L, 0); /* first result (false) */ + lua_pushvalue(L, -2); /* error message */ + return 2; /* return false, msg */ + } + else + return lua_gettop(L) - (int)extra; /* return all results */ +} + + +static int luaB_pcall (lua_State *L) { + int status; + luaL_checkany(L, 1); + lua_pushboolean(L, 1); /* first result if no errors */ + lua_insert(L, 1); /* put it in place */ + status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall); + return finishpcall(L, status, 0); +} + + +/* +** Do a protected call with error handling. After 'lua_rotate', the +** stack will have ; so, the function passes +** 2 to 'finishpcall' to skip the 2 first values when returning results. +*/ +static int luaB_xpcall (lua_State *L) { + int status; + int n = lua_gettop(L); + luaL_checktype(L, 2, LUA_TFUNCTION); /* check error function */ + lua_pushboolean(L, 1); /* first result */ + lua_pushvalue(L, 1); /* function */ + lua_rotate(L, 3, 2); /* move them below function's arguments */ + status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall); + return finishpcall(L, status, 2); +} + + +static int luaB_tostring (lua_State *L) { + luaL_checkany(L, 1); + luaL_tolstring(L, 1, NULL); + return 1; +} + + +static const luaL_Reg base_funcs[] = { + {"assert", luaB_assert}, + {"collectgarbage", luaB_collectgarbage}, + {"dofile", luaB_dofile}, + {"error", luaB_error}, + {"getmetatable", luaB_getmetatable}, + {"ipairs", luaB_ipairs}, + {"loadfile", luaB_loadfile}, + {"load", luaB_load}, +#if defined(LUA_COMPAT_LOADSTRING) + {"loadstring", luaB_load}, +#endif + {"next", luaB_next}, + {"pairs", luaB_pairs}, + {"pcall", luaB_pcall}, + {"print", luaB_print}, + {"rawequal", luaB_rawequal}, + {"rawlen", luaB_rawlen}, + {"rawget", luaB_rawget}, + {"rawset", luaB_rawset}, + {"select", luaB_select}, + {"setmetatable", luaB_setmetatable}, + {"tonumber", luaB_tonumber}, + {"tostring", luaB_tostring}, + {"type", luaB_type}, + {"xpcall", luaB_xpcall}, + /* placeholders */ + {"_G", NULL}, + {"_VERSION", NULL}, + {NULL, NULL} +}; + + +LUAMOD_API int luaopen_base (lua_State *L) { + /* open lib into global table */ + lua_pushglobaltable(L); + luaL_setfuncs(L, base_funcs, 0); + /* set global _G */ + lua_pushvalue(L, -1); + lua_setfield(L, -2, "_G"); + /* set global _VERSION */ + lua_pushliteral(L, LUA_VERSION); + lua_setfield(L, -2, "_VERSION"); + return 1; +} + -- cgit v1.2.3