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Diffstat (limited to 'source/luametatex/source/luacore/lua54/src/lobject.c')
-rw-r--r--source/luametatex/source/luacore/lua54/src/lobject.c602
1 files changed, 602 insertions, 0 deletions
diff --git a/source/luametatex/source/luacore/lua54/src/lobject.c b/source/luametatex/source/luacore/lua54/src/lobject.c
new file mode 100644
index 000000000..a2c006098
--- /dev/null
+++ b/source/luametatex/source/luacore/lua54/src/lobject.c
@@ -0,0 +1,602 @@
+/*
+** $Id: lobject.c $
+** Some generic functions over Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#define lobject_c
+#define LUA_CORE
+
+#include "lprefix.h"
+
+
+#include <locale.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lctype.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lvm.h"
+
+
+/*
+** Computes ceil(log2(x))
+*/
+int luaO_ceillog2 (unsigned int x) {
+ static const lu_byte log_2[256] = { /* log_2[i] = ceil(log2(i - 1)) */
+ 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+ 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
+ };
+ int l = 0;
+ x--;
+ while (x >= 256) { l += 8; x >>= 8; }
+ return l + log_2[x];
+}
+
+
+static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
+ lua_Integer v2) {
+ switch (op) {
+ case LUA_OPADD: return intop(+, v1, v2);
+ case LUA_OPSUB:return intop(-, v1, v2);
+ case LUA_OPMUL:return intop(*, v1, v2);
+ case LUA_OPMOD: return luaV_mod(L, v1, v2);
+ case LUA_OPIDIV: return luaV_idiv(L, v1, v2);
+ case LUA_OPBAND: return intop(&, v1, v2);
+ case LUA_OPBOR: return intop(|, v1, v2);
+ case LUA_OPBXOR: return intop(^, v1, v2);
+ case LUA_OPSHL: return luaV_shiftl(v1, v2);
+ case LUA_OPSHR: return luaV_shiftl(v1, -v2);
+ case LUA_OPUNM: return intop(-, 0, v1);
+ case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1);
+ default: lua_assert(0); return 0;
+ }
+}
+
+
+static lua_Number numarith (lua_State *L, int op, lua_Number v1,
+ lua_Number v2) {
+ switch (op) {
+ case LUA_OPADD: return luai_numadd(L, v1, v2);
+ case LUA_OPSUB: return luai_numsub(L, v1, v2);
+ case LUA_OPMUL: return luai_nummul(L, v1, v2);
+ case LUA_OPDIV: return luai_numdiv(L, v1, v2);
+ case LUA_OPPOW: return luai_numpow(L, v1, v2);
+ case LUA_OPIDIV: return luai_numidiv(L, v1, v2);
+ case LUA_OPUNM: return luai_numunm(L, v1);
+ case LUA_OPMOD: return luaV_modf(L, v1, v2);
+ default: lua_assert(0); return 0;
+ }
+}
+
+
+int luaO_rawarith (lua_State *L, int op, const TValue *p1, const TValue *p2,
+ TValue *res) {
+ switch (op) {
+ case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
+ case LUA_OPSHL: case LUA_OPSHR:
+ case LUA_OPBNOT: { /* operate only on integers */
+ lua_Integer i1; lua_Integer i2;
+ if (tointegerns(p1, &i1) && tointegerns(p2, &i2)) {
+ setivalue(res, intarith(L, op, i1, i2));
+ return 1;
+ }
+ else return 0; /* fail */
+ }
+ case LUA_OPDIV: case LUA_OPPOW: { /* operate only on floats */
+ lua_Number n1; lua_Number n2;
+ if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
+ setfltvalue(res, numarith(L, op, n1, n2));
+ return 1;
+ }
+ else return 0; /* fail */
+ }
+ default: { /* other operations */
+ lua_Number n1; lua_Number n2;
+ if (ttisinteger(p1) && ttisinteger(p2)) {
+ setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2)));
+ return 1;
+ }
+ else if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
+ setfltvalue(res, numarith(L, op, n1, n2));
+ return 1;
+ }
+ else return 0; /* fail */
+ }
+ }
+}
+
+
+void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
+ StkId res) {
+ if (!luaO_rawarith(L, op, p1, p2, s2v(res))) {
+ /* could not perform raw operation; try metamethod */
+ luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD));
+ }
+}
+
+
+int luaO_hexavalue (int c) {
+ if (lisdigit(c)) return c - '0';
+ else return (ltolower(c) - 'a') + 10;
+}
+
+
+static int isneg (const char **s) {
+ if (**s == '-') { (*s)++; return 1; }
+ else if (**s == '+') (*s)++;
+ return 0;
+}
+
+
+
+/*
+** {==================================================================
+** Lua's implementation for 'lua_strx2number'
+** ===================================================================
+*/
+
+#if !defined(lua_strx2number)
+
+/* maximum number of significant digits to read (to avoid overflows
+ even with single floats) */
+#define MAXSIGDIG 30
+
+/*
+** convert a hexadecimal numeric string to a number, following
+** C99 specification for 'strtod'
+*/
+static lua_Number lua_strx2number (const char *s, char **endptr) {
+ int dot = lua_getlocaledecpoint();
+ lua_Number r = l_mathop(0.0); /* result (accumulator) */
+ int sigdig = 0; /* number of significant digits */
+ int nosigdig = 0; /* number of non-significant digits */
+ int e = 0; /* exponent correction */
+ int neg; /* 1 if number is negative */
+ int hasdot = 0; /* true after seen a dot */
+ *endptr = cast_charp(s); /* nothing is valid yet */
+ while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
+ neg = isneg(&s); /* check sign */
+ if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */
+ return l_mathop(0.0); /* invalid format (no '0x') */
+ for (s += 2; ; s++) { /* skip '0x' and read numeral */
+ if (*s == dot) {
+ if (hasdot) break; /* second dot? stop loop */
+ else hasdot = 1;
+ }
+ else if (lisxdigit(cast_uchar(*s))) {
+ if (sigdig == 0 && *s == '0') /* non-significant digit (zero)? */
+ nosigdig++;
+ else if (++sigdig <= MAXSIGDIG) /* can read it without overflow? */
+ r = (r * l_mathop(16.0)) + luaO_hexavalue(*s);
+ else e++; /* too many digits; ignore, but still count for exponent */
+ if (hasdot) e--; /* decimal digit? correct exponent */
+ }
+ else break; /* neither a dot nor a digit */
+ }
+ if (nosigdig + sigdig == 0) /* no digits? */
+ return l_mathop(0.0); /* invalid format */
+ *endptr = cast_charp(s); /* valid up to here */
+ e *= 4; /* each digit multiplies/divides value by 2^4 */
+ if (*s == 'p' || *s == 'P') { /* exponent part? */
+ int exp1 = 0; /* exponent value */
+ int neg1; /* exponent sign */
+ s++; /* skip 'p' */
+ neg1 = isneg(&s); /* sign */
+ if (!lisdigit(cast_uchar(*s)))
+ return l_mathop(0.0); /* invalid; must have at least one digit */
+ while (lisdigit(cast_uchar(*s))) /* read exponent */
+ exp1 = exp1 * 10 + *(s++) - '0';
+ if (neg1) exp1 = -exp1;
+ e += exp1;
+ *endptr = cast_charp(s); /* valid up to here */
+ }
+ if (neg) r = -r;
+ return l_mathop(ldexp)(r, e);
+}
+
+#endif
+/* }====================================================== */
+
+
+/* maximum length of a numeral to be converted to a number */
+#if !defined (L_MAXLENNUM)
+#define L_MAXLENNUM 200
+#endif
+
+/*
+** Convert string 's' to a Lua number (put in 'result'). Return NULL on
+** fail or the address of the ending '\0' on success. ('mode' == 'x')
+** means a hexadecimal numeral.
+*/
+static const char *l_str2dloc (const char *s, lua_Number *result, int mode) {
+ char *endptr;
+ *result = (mode == 'x') ? lua_strx2number(s, &endptr) /* try to convert */
+ : lua_str2number(s, &endptr);
+ if (endptr == s) return NULL; /* nothing recognized? */
+ while (lisspace(cast_uchar(*endptr))) endptr++; /* skip trailing spaces */
+ return (*endptr == '\0') ? endptr : NULL; /* OK iff no trailing chars */
+}
+
+
+/*
+** Convert string 's' to a Lua number (put in 'result') handling the
+** current locale.
+** This function accepts both the current locale or a dot as the radix
+** mark. If the conversion fails, it may mean number has a dot but
+** locale accepts something else. In that case, the code copies 's'
+** to a buffer (because 's' is read-only), changes the dot to the
+** current locale radix mark, and tries to convert again.
+** The variable 'mode' checks for special characters in the string:
+** - 'n' means 'inf' or 'nan' (which should be rejected)
+** - 'x' means a hexadecimal numeral
+** - '.' just optimizes the search for the common case (no special chars)
+*/
+static const char *l_str2d (const char *s, lua_Number *result) {
+ const char *endptr;
+ const char *pmode = strpbrk(s, ".xXnN"); /* look for special chars */
+ int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0;
+ if (mode == 'n') /* reject 'inf' and 'nan' */
+ return NULL;
+ endptr = l_str2dloc(s, result, mode); /* try to convert */
+ if (endptr == NULL) { /* failed? may be a different locale */
+ char buff[L_MAXLENNUM + 1];
+ const char *pdot = strchr(s, '.');
+ if (pdot == NULL || strlen(s) > L_MAXLENNUM)
+ return NULL; /* string too long or no dot; fail */
+ strcpy(buff, s); /* copy string to buffer */
+ buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */
+ endptr = l_str2dloc(buff, result, mode); /* try again */
+ if (endptr != NULL)
+ endptr = s + (endptr - buff); /* make relative to 's' */
+ }
+ return endptr;
+}
+
+
+#define MAXBY10 cast(lua_Unsigned, LUA_MAXINTEGER / 10)
+#define MAXLASTD cast_int(LUA_MAXINTEGER % 10)
+
+static const char *l_str2int (const char *s, lua_Integer *result) {
+ lua_Unsigned a = 0;
+ int empty = 1;
+ int neg;
+ while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
+ neg = isneg(&s);
+ if (s[0] == '0' &&
+ (s[1] == 'x' || s[1] == 'X')) { /* hex? */
+ s += 2; /* skip '0x' */
+ for (; lisxdigit(cast_uchar(*s)); s++) {
+ a = a * 16 + luaO_hexavalue(*s);
+ empty = 0;
+ }
+ }
+ else { /* decimal */
+ for (; lisdigit(cast_uchar(*s)); s++) {
+ int d = *s - '0';
+ if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */
+ return NULL; /* do not accept it (as integer) */
+ a = a * 10 + d;
+ empty = 0;
+ }
+ }
+ while (lisspace(cast_uchar(*s))) s++; /* skip trailing spaces */
+ if (empty || *s != '\0') return NULL; /* something wrong in the numeral */
+ else {
+ *result = l_castU2S((neg) ? 0u - a : a);
+ return s;
+ }
+}
+
+
+size_t luaO_str2num (const char *s, TValue *o) {
+ lua_Integer i; lua_Number n;
+ const char *e;
+ if ((e = l_str2int(s, &i)) != NULL) { /* try as an integer */
+ setivalue(o, i);
+ }
+ else if ((e = l_str2d(s, &n)) != NULL) { /* else try as a float */
+ setfltvalue(o, n);
+ }
+ else
+ return 0; /* conversion failed */
+ return (e - s) + 1; /* success; return string size */
+}
+
+
+int luaO_utf8esc (char *buff, unsigned long x) {
+ int n = 1; /* number of bytes put in buffer (backwards) */
+ lua_assert(x <= 0x7FFFFFFFu);
+ if (x < 0x80) /* ascii? */
+ buff[UTF8BUFFSZ - 1] = cast_char(x);
+ else { /* need continuation bytes */
+ unsigned int mfb = 0x3f; /* maximum that fits in first byte */
+ do { /* add continuation bytes */
+ buff[UTF8BUFFSZ - (n++)] = cast_char(0x80 | (x & 0x3f));
+ x >>= 6; /* remove added bits */
+ mfb >>= 1; /* now there is one less bit available in first byte */
+ } while (x > mfb); /* still needs continuation byte? */
+ buff[UTF8BUFFSZ - n] = cast_char((~mfb << 1) | x); /* add first byte */
+ }
+ return n;
+}
+
+
+/*
+** Maximum length of the conversion of a number to a string. Must be
+** enough to accommodate both LUA_INTEGER_FMT and LUA_NUMBER_FMT.
+** (For a long long int, this is 19 digits plus a sign and a final '\0',
+** adding to 21. For a long double, it can go to a sign, 33 digits,
+** the dot, an exponent letter, an exponent sign, 5 exponent digits,
+** and a final '\0', adding to 43.)
+*/
+#define MAXNUMBER2STR 44
+
+
+/*
+** Convert a number object to a string, adding it to a buffer
+*/
+static int tostringbuff (TValue *obj, char *buff) {
+ int len;
+ lua_assert(ttisnumber(obj));
+ if (ttisinteger(obj))
+ len = lua_integer2str(buff, MAXNUMBER2STR, ivalue(obj));
+ else {
+ len = lua_number2str(buff, MAXNUMBER2STR, fltvalue(obj));
+ if (buff[strspn(buff, "-0123456789")] == '\0') { /* looks like an int? */
+ buff[len++] = lua_getlocaledecpoint();
+ buff[len++] = '0'; /* adds '.0' to result */
+ }
+ }
+ return len;
+}
+
+
+/*
+** Convert a number object to a Lua string, replacing the value at 'obj'
+*/
+void luaO_tostring (lua_State *L, TValue *obj) {
+ char buff[MAXNUMBER2STR];
+ int len = tostringbuff(obj, buff);
+ setsvalue(L, obj, luaS_newlstr(L, buff, len));
+}
+
+
+
+
+/*
+** {==================================================================
+** 'luaO_pushvfstring'
+** ===================================================================
+*/
+
+/*
+** Size for buffer space used by 'luaO_pushvfstring'. It should be
+** (LUA_IDSIZE + MAXNUMBER2STR) + a minimal space for basic messages,
+** so that 'luaG_addinfo' can work directly on the buffer.
+*/
+#define BUFVFS (LUA_IDSIZE + MAXNUMBER2STR + 95)
+
+/* buffer used by 'luaO_pushvfstring' */
+typedef struct BuffFS {
+ lua_State *L;
+ int pushed; /* true if there is a part of the result on the stack */
+ int blen; /* length of partial string in 'space' */
+ char space[BUFVFS]; /* holds last part of the result */
+} BuffFS;
+
+
+/*
+** Push given string to the stack, as part of the result, and
+** join it to previous partial result if there is one.
+** It may call 'luaV_concat' while using one slot from EXTRA_STACK.
+** This call cannot invoke metamethods, as both operands must be
+** strings. It can, however, raise an error if the result is too
+** long. In that case, 'luaV_concat' frees the extra slot before
+** raising the error.
+*/
+static void pushstr (BuffFS *buff, const char *str, size_t lstr) {
+ lua_State *L = buff->L;
+ setsvalue2s(L, L->top, luaS_newlstr(L, str, lstr));
+ L->top++; /* may use one slot from EXTRA_STACK */
+ if (!buff->pushed) /* no previous string on the stack? */
+ buff->pushed = 1; /* now there is one */
+ else /* join previous string with new one */
+ luaV_concat(L, 2);
+}
+
+
+/*
+** empty the buffer space into the stack
+*/
+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 numeral 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));
+ }
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-15 13:30:14 +0000