mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
606 lines
21 KiB
C
606 lines
21 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Lua │
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│ Copyright © 2004-2021 Lua.org, PUC-Rio. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#define lobject_c
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#define LUA_CORE
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#include "libc/str/str.h"
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#include "third_party/lua/lctype.h"
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#include "third_party/lua/ldebug.h"
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#include "third_party/lua/ldo.h"
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#include "third_party/lua/lmem.h"
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#include "third_party/lua/lobject.h"
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#include "third_party/lua/lprefix.h"
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#include "third_party/lua/lstate.h"
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#include "third_party/lua/lstring.h"
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#include "third_party/lua/lua.h"
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#include "third_party/lua/lvm.h"
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asm(".ident\t\"\\n\\n\
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Lua 5.4.3 (MIT License)\\n\
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Copyright 1994–2021 Lua.org, PUC-Rio.\"");
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asm(".include \"libc/disclaimer.inc\"");
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static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
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lua_Integer v2) {
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switch (op) {
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case LUA_OPADD: return intop(+, v1, v2);
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case LUA_OPSUB:return intop(-, v1, v2);
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case LUA_OPMUL:return intop(*, v1, v2);
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case LUA_OPMOD: return luaV_mod(L, v1, v2);
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case LUA_OPIDIV: return luaV_idiv(L, v1, v2);
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case LUA_OPBAND: return intop(&, v1, v2);
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case LUA_OPBOR: return intop(|, v1, v2);
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case LUA_OPBXOR: return intop(^, v1, v2);
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case LUA_OPSHL: return luaV_shiftl(v1, v2);
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case LUA_OPSHR: return luaV_shiftl(v1, -v2);
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case LUA_OPUNM: return intop(-, 0, v1);
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case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1);
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default: lua_assert(0); return 0;
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}
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}
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static lua_Number numarith (lua_State *L, int op, lua_Number v1,
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lua_Number v2) {
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switch (op) {
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case LUA_OPADD: return luai_numadd(L, v1, v2);
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case LUA_OPSUB: return luai_numsub(L, v1, v2);
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case LUA_OPMUL: return luai_nummul(L, v1, v2);
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case LUA_OPDIV: return luai_numdiv(L, v1, v2);
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case LUA_OPPOW: return luai_numpow(L, v1, v2);
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case LUA_OPIDIV: return luai_numidiv(L, v1, v2);
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case LUA_OPUNM: return luai_numunm(L, v1);
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case LUA_OPMOD: return luaV_modf(L, v1, v2);
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default: lua_assert(0); return 0;
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}
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}
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int luaO_rawarith (lua_State *L, int op, const TValue *p1, const TValue *p2,
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TValue *res) {
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switch (op) {
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case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
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case LUA_OPSHL: case LUA_OPSHR:
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case LUA_OPBNOT: { /* operate only on integers */
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lua_Integer i1; lua_Integer i2;
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if (tointegerns(p1, &i1) && tointegerns(p2, &i2)) {
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setivalue(res, intarith(L, op, i1, i2));
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return 1;
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}
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else return 0; /* fail */
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}
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case LUA_OPDIV: case LUA_OPPOW: { /* operate only on floats */
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lua_Number n1; lua_Number n2;
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if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
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setfltvalue(res, numarith(L, op, n1, n2));
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return 1;
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}
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else return 0; /* fail */
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}
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default: { /* other operations */
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lua_Number n1; lua_Number n2;
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if (ttisinteger(p1) && ttisinteger(p2)) {
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setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2)));
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return 1;
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}
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else if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
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setfltvalue(res, numarith(L, op, n1, n2));
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return 1;
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}
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else return 0; /* fail */
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}
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}
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}
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void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
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StkId res) {
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if (!luaO_rawarith(L, op, p1, p2, s2v(res))) {
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/* could not perform raw operation; try metamethod */
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luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD));
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}
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}
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int luaO_hexavalue (int c) {
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if (lisdigit(c)) return c - '0';
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else return (ltolower(c) - 'a') + 10;
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}
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static int isneg (const char **s) {
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if (**s == '-') { (*s)++; return 1; }
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else if (**s == '+') (*s)++;
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return 0;
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}
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/*
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** {==================================================================
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** Lua's implementation for 'lua_strx2number'
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** ===================================================================
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*/
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#if !defined(lua_strx2number)
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/* maximum number of significant digits to read (to avoid overflows
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even with single floats) */
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#define MAXSIGDIG 30
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/*
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** convert a hexadecimal numeric string to a number, following
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** C99 specification for 'strtod'
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*/
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static lua_Number lua_strx2number (const char *s, char **endptr) {
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int dot = lua_getlocaledecpoint();
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lua_Number r = 0.0; /* result (accumulator) */
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int sigdig = 0; /* number of significant digits */
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int nosigdig = 0; /* number of non-significant digits */
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int e = 0; /* exponent correction */
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int neg; /* 1 if number is negative */
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int hasdot = 0; /* true after seen a dot */
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*endptr = cast_charp(s); /* nothing is valid yet */
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while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
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neg = isneg(&s); /* check sign */
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if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */
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return 0.0; /* invalid format (no '0x') */
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for (s += 2; ; s++) { /* skip '0x' and read numeral */
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if (*s == dot) {
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if (hasdot) break; /* second dot? stop loop */
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else hasdot = 1;
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}
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else if (lisxdigit(cast_uchar(*s))) {
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if (sigdig == 0 && *s == '0') /* non-significant digit (zero)? */
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nosigdig++;
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else if (++sigdig <= MAXSIGDIG) /* can read it without overflow? */
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r = (r * cast_num(16.0)) + luaO_hexavalue(*s);
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else e++; /* too many digits; ignore, but still count for exponent */
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if (hasdot) e--; /* decimal digit? correct exponent */
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}
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else break; /* neither a dot nor a digit */
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}
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if (nosigdig + sigdig == 0) /* no digits? */
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return 0.0; /* invalid format */
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*endptr = cast_charp(s); /* valid up to here */
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e *= 4; /* each digit multiplies/divides value by 2^4 */
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if (*s == 'p' || *s == 'P') { /* exponent part? */
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int exp1 = 0; /* exponent value */
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int neg1; /* exponent sign */
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s++; /* skip 'p' */
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neg1 = isneg(&s); /* sign */
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if (!lisdigit(cast_uchar(*s)))
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return 0.0; /* invalid; must have at least one digit */
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while (lisdigit(cast_uchar(*s))) /* read exponent */
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exp1 = exp1 * 10 + *(s++) - '0';
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if (neg1) exp1 = -exp1;
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e += exp1;
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*endptr = cast_charp(s); /* valid up to here */
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}
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if (neg) r = -r;
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return l_mathop(ldexp)(r, e);
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}
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#endif
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/* }====================================================== */
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/* maximum length of a numeral to be converted to a number */
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#if !defined (L_MAXLENNUM)
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#define L_MAXLENNUM 200
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#endif
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/*
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** Convert string 's' to a Lua number (put in 'result'). Return NULL on
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** fail or the address of the ending '\0' on success. ('mode' == 'x')
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** means a hexadecimal numeral.
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*/
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static const char *l_str2dloc (const char *s, lua_Number *result, int mode) {
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char *endptr;
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*result = (mode == 'x') ? lua_strx2number(s, &endptr) /* try to convert */
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: lua_str2number(s, &endptr);
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if (endptr == s) return NULL; /* nothing recognized? */
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while (lisspace(cast_uchar(*endptr))) endptr++; /* skip trailing spaces */
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return (*endptr == '\0') ? endptr : NULL; /* OK iff no trailing chars */
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}
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/*
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** Convert string 's' to a Lua number (put in 'result') handling the
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** current locale.
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** This function accepts both the current locale or a dot as the radix
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** mark. If the conversion fails, it may mean number has a dot but
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** locale accepts something else. In that case, the code copies 's'
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** to a buffer (because 's' is read-only), changes the dot to the
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** current locale radix mark, and tries to convert again.
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** The variable 'mode' checks for special characters in the string:
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** - 'n' means 'inf' or 'nan' (which should be rejected)
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** - 'x' means a hexadecimal numeral
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** - '.' just optimizes the search for the common case (no special chars)
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*/
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static const char *l_str2d (const char *s, lua_Number *result) {
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const char *endptr;
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const char *pmode = strpbrk(s, ".xXnN"); /* look for special chars */
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int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0;
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if (mode == 'n') /* reject 'inf' and 'nan' */
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return NULL;
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endptr = l_str2dloc(s, result, mode); /* try to convert */
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if (endptr == NULL) { /* failed? may be a different locale */
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char buff[L_MAXLENNUM + 1];
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const char *pdot = strchr(s, '.');
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if (pdot == NULL || strlen(s) > L_MAXLENNUM)
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return NULL; /* string too long or no dot; fail */
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strcpy(buff, s); /* copy string to buffer */
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buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */
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endptr = l_str2dloc(buff, result, mode); /* try again */
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if (endptr != NULL)
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endptr = s + (endptr - buff); /* make relative to 's' */
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}
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return endptr;
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}
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#define MAXBY10 cast(lua_Unsigned, LUA_MAXINTEGER / 10)
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#define MAXBY8 cast(lua_Unsigned, LUA_MAXINTEGER / 8)
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#define MAXLASTD cast_int(LUA_MAXINTEGER % 10)
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#define MAXLASTD8 cast_int(LUA_MAXINTEGER % 8)
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static const char *l_str2int (const char *s, lua_Integer *result) {
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lua_Unsigned a = 0;
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int empty = 1;
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int neg;
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while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
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neg = isneg(&s);
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if (s[0] == '0' &&
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(s[1] == 'x' || s[1] == 'X')) { /* hex? */
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s += 2; /* skip '0x' */
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for (; lisxdigit(cast_uchar(*s)); s++) {
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a = a * 16 + luaO_hexavalue(*s);
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empty = 0;
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}
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}
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if (s[0] == '0' &&
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(s[1] == 'b' || s[1] == 'B')) { /* [jart] binary */
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s += 2; /* skip '0b' */
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for (; lisbdigit(cast_uchar(*s)); s++) {
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a = a * 2 + (*s - '0');
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empty = 0;
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}
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}
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else if (s[0] == '0') { /* [jart] octal is the best radix */
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for (; lisdigit(cast_uchar(*s)); s++) {
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int d = *s - '0';
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if (a >= MAXBY8 && (a > MAXBY8 || d > MAXLASTD8 + neg)) /* overflow? */
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return NULL; /* do not accept it (as integer) */
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a = a * 8 + d;
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empty = 0;
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}
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}
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else { /* decimal */
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for (; lisdigit(cast_uchar(*s)); s++) {
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int d = *s - '0';
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if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */
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return NULL; /* do not accept it (as integer) */
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a = a * 10 + d;
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empty = 0;
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}
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}
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while (lisspace(cast_uchar(*s))) s++; /* skip trailing spaces */
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if (empty || *s != '\0') return NULL; /* something wrong in the numeral */
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else {
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*result = l_castU2S((neg) ? 0u - a : a);
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return s;
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}
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}
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size_t luaO_str2num (const char *s, TValue *o) {
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lua_Integer i; lua_Number n;
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const char *e;
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if ((e = l_str2int(s, &i)) != NULL) { /* try as an integer */
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setivalue(o, i);
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}
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else if ((e = l_str2d(s, &n)) != NULL) { /* else try as a float */
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setfltvalue(o, n);
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}
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else
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return 0; /* conversion failed */
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return (e - s) + 1; /* success; return string size */
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}
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int luaO_utf8esc (char *buff, unsigned long x) {
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int n = 1; /* number of bytes put in buffer (backwards) */
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lua_assert(x <= 0x7FFFFFFFu);
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if (x < 0x80) /* ascii? */
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buff[UTF8BUFFSZ - 1] = cast_char(x);
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else { /* need continuation bytes */
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unsigned int mfb = 0x3f; /* maximum that fits in first byte */
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do { /* add continuation bytes */
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buff[UTF8BUFFSZ - (n++)] = cast_char(0x80 | (x & 0x3f));
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x >>= 6; /* remove added bits */
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mfb >>= 1; /* now there is one less bit available in first byte */
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} while (x > mfb); /* still needs continuation byte? */
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buff[UTF8BUFFSZ - n] = cast_char((~mfb << 1) | x); /* add first byte */
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}
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return n;
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}
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/*
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** Maximum length of the conversion of a number to a string. Must be
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** enough to accommodate both LUA_INTEGER_FMT and LUA_NUMBER_FMT.
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** (For a long long int, this is 19 digits plus a sign and a final '\0',
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** adding to 21. For a long double, it can go to a sign, 33 digits,
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** the dot, an exponent letter, an exponent sign, 5 exponent digits,
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** and a final '\0', adding to 43.)
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*/
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#define MAXNUMBER2STR 44
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||
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/*
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||
** Convert a number object to a string, adding it to a buffer
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*/
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static int tostringbuff (TValue *obj, char *buff) {
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int len;
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lua_assert(ttisnumber(obj));
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if (ttisinteger(obj))
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len = lua_integer2str(buff, MAXNUMBER2STR, ivalue(obj));
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else {
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len = lua_number2str(buff, MAXNUMBER2STR, fltvalue(obj));
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if (buff[strspn(buff, "-0123456789")] == '\0') { /* looks like an int? */
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buff[len++] = lua_getlocaledecpoint();
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buff[len++] = '0'; /* adds '.0' to result */
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}
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}
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return len;
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}
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/*
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** Convert a number object to a Lua string, replacing the value at 'obj'
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*/
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void luaO_tostring (lua_State *L, TValue *obj) {
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char buff[MAXNUMBER2STR];
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||
int len = tostringbuff(obj, buff);
|
||
setsvalue(L, obj, luaS_newlstr(L, buff, len));
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||
}
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||
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||
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||
/*
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||
** {==================================================================
|
||
** 'luaO_pushvfstring'
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||
** ===================================================================
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||
*/
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||
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||
/* size for buffer space used by 'luaO_pushvfstring' */
|
||
#define BUFVFS 200
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||
|
||
/* buffer used by 'luaO_pushvfstring' */
|
||
typedef struct BuffFS {
|
||
lua_State *L;
|
||
int pushed; /* number of string pieces already on the stack */
|
||
int blen; /* length of partial string in 'space' */
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||
char space[BUFVFS]; /* holds last part of the result */
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||
} BuffFS;
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||
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/*
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||
** Push given string to the stack, as part of the buffer, and
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** join the partial strings in the stack into one.
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*/
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||
static void pushstr (BuffFS *buff, const char *str, size_t l) {
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lua_State *L = buff->L;
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setsvalue2s(L, L->top, luaS_newlstr(L, str, l));
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L->top++; /* may use one extra slot */
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buff->pushed++;
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luaV_concat(L, buff->pushed); /* join partial results into one */
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buff->pushed = 1;
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}
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/*
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** empty the buffer space into the stack
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*/
|
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static void clearbuff (BuffFS *buff) {
|
||
pushstr(buff, buff->space, buff->blen); /* push buffer contents */
|
||
buff->blen = 0; /* space now is empty */
|
||
}
|
||
|
||
|
||
/*
|
||
** Get a space of size 'sz' in the buffer. If buffer has not enough
|
||
** space, empty it. 'sz' must fit in an empty buffer.
|
||
*/
|
||
static char *getbuff (BuffFS *buff, int sz) {
|
||
lua_assert(buff->blen <= BUFVFS); lua_assert(sz <= BUFVFS);
|
||
if (sz > BUFVFS - buff->blen) /* not enough space? */
|
||
clearbuff(buff);
|
||
return buff->space + buff->blen;
|
||
}
|
||
|
||
|
||
#define addsize(b,sz) ((b)->blen += (sz))
|
||
|
||
|
||
/*
|
||
** Add 'str' to the buffer. If string is larger than the buffer space,
|
||
** push the string directly to the stack.
|
||
*/
|
||
static void addstr2buff (BuffFS *buff, const char *str, size_t slen) {
|
||
if (slen <= BUFVFS) { /* does string fit into buffer? */
|
||
char *bf = getbuff(buff, cast_int(slen));
|
||
memcpy(bf, str, slen); /* add string to buffer */
|
||
addsize(buff, cast_int(slen));
|
||
}
|
||
else { /* string larger than buffer */
|
||
clearbuff(buff); /* string comes after buffer's content */
|
||
pushstr(buff, str, slen); /* push string */
|
||
}
|
||
}
|
||
|
||
|
||
/*
|
||
** Add a number to the buffer.
|
||
*/
|
||
static void addnum2buff (BuffFS *buff, TValue *num) {
|
||
char *numbuff = getbuff(buff, MAXNUMBER2STR);
|
||
int len = tostringbuff(num, numbuff); /* format number into 'numbuff' */
|
||
addsize(buff, len);
|
||
}
|
||
|
||
|
||
/*
|
||
** this function handles only '%d', '%c', '%f', '%p', '%s', and '%%'
|
||
conventional formats, plus Lua-specific '%I' and '%U'
|
||
*/
|
||
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
|
||
BuffFS buff; /* holds last part of the result */
|
||
const char *e; /* points to next '%' */
|
||
buff.pushed = buff.blen = 0;
|
||
buff.L = L;
|
||
while ((e = strchr(fmt, '%')) != NULL) {
|
||
addstr2buff(&buff, fmt, e - fmt); /* add 'fmt' up to '%' */
|
||
switch (*(e + 1)) { /* conversion specifier */
|
||
case 's': { /* zero-terminated string */
|
||
const char *s = va_arg(argp, char *);
|
||
if (s == NULL) s = "(null)";
|
||
addstr2buff(&buff, s, strlen(s));
|
||
break;
|
||
}
|
||
case 'c': { /* an 'int' as a character */
|
||
char c = cast_uchar(va_arg(argp, int));
|
||
addstr2buff(&buff, &c, sizeof(char));
|
||
break;
|
||
}
|
||
case 'd': { /* an 'int' */
|
||
TValue num;
|
||
setivalue(&num, va_arg(argp, int));
|
||
addnum2buff(&buff, &num);
|
||
break;
|
||
}
|
||
case 'I': { /* a 'lua_Integer' */
|
||
TValue num;
|
||
setivalue(&num, cast(lua_Integer, va_arg(argp, l_uacInt)));
|
||
addnum2buff(&buff, &num);
|
||
break;
|
||
}
|
||
case 'f': { /* a 'lua_Number' */
|
||
TValue num;
|
||
setfltvalue(&num, cast_num(va_arg(argp, l_uacNumber)));
|
||
addnum2buff(&buff, &num);
|
||
break;
|
||
}
|
||
case 'p': { /* a pointer */
|
||
const int sz = 3 * sizeof(void*) + 8; /* enough space for '%p' */
|
||
char *bf = getbuff(&buff, sz);
|
||
void *p = va_arg(argp, void *);
|
||
int len = lua_pointer2str(bf, sz, p);
|
||
addsize(&buff, len);
|
||
break;
|
||
}
|
||
case 'U': { /* a 'long' as a UTF-8 sequence */
|
||
char bf[UTF8BUFFSZ];
|
||
int len = luaO_utf8esc(bf, va_arg(argp, long));
|
||
addstr2buff(&buff, bf + UTF8BUFFSZ - len, len);
|
||
break;
|
||
}
|
||
case '%': {
|
||
addstr2buff(&buff, "%", 1);
|
||
break;
|
||
}
|
||
default: {
|
||
luaG_runerror(L, "invalid option '%%%c' to 'lua_pushfstring'",
|
||
*(e + 1));
|
||
}
|
||
}
|
||
fmt = e + 2; /* skip '%' and the specifier */
|
||
}
|
||
addstr2buff(&buff, fmt, strlen(fmt)); /* rest of 'fmt' */
|
||
clearbuff(&buff); /* empty buffer into the stack */
|
||
lua_assert(buff.pushed == 1);
|
||
return svalue(s2v(L->top - 1));
|
||
}
|
||
|
||
|
||
const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
|
||
const char *msg;
|
||
va_list argp;
|
||
va_start(argp, fmt);
|
||
msg = luaO_pushvfstring(L, fmt, argp);
|
||
va_end(argp);
|
||
return msg;
|
||
}
|
||
|
||
/* }================================================================== */
|
||
|
||
|
||
#define RETS "..."
|
||
#define PRE "[string \""
|
||
#define POS "\"]"
|
||
|
||
#define addstr(a,b,l) ( memcpy(a,b,(l) * sizeof(char)), a += (l) )
|
||
|
||
void luaO_chunkid (char *out, const char *source, size_t srclen) {
|
||
size_t bufflen = LUA_IDSIZE; /* free space in buffer */
|
||
if (*source == '=') { /* 'literal' source */
|
||
if (srclen <= bufflen) /* small enough? */
|
||
memcpy(out, source + 1, srclen * sizeof(char));
|
||
else { /* truncate it */
|
||
addstr(out, source + 1, bufflen - 1);
|
||
*out = '\0';
|
||
}
|
||
}
|
||
else if (*source == '@') { /* file name */
|
||
if (srclen <= bufflen) /* small enough? */
|
||
memcpy(out, source + 1, srclen * sizeof(char));
|
||
else { /* add '...' before rest of name */
|
||
addstr(out, RETS, LL(RETS));
|
||
bufflen -= LL(RETS);
|
||
memcpy(out, source + 1 + srclen - bufflen, bufflen * sizeof(char));
|
||
}
|
||
}
|
||
else { /* string; format as [string "source"] */
|
||
const char *nl = strchr(source, '\n'); /* find first new line (if any) */
|
||
addstr(out, PRE, LL(PRE)); /* add prefix */
|
||
bufflen -= LL(PRE RETS POS) + 1; /* save space for prefix+suffix+'\0' */
|
||
if (srclen < bufflen && nl == NULL) { /* small one-line source? */
|
||
addstr(out, source, srclen); /* keep it */
|
||
}
|
||
else {
|
||
if (nl != NULL) srclen = nl - source; /* stop at first newline */
|
||
if (srclen > bufflen) srclen = bufflen;
|
||
addstr(out, source, srclen);
|
||
addstr(out, RETS, LL(RETS));
|
||
}
|
||
memcpy(out, POS, (LL(POS) + 1) * sizeof(char));
|
||
}
|
||
}
|
||
|