diff options
Diffstat (limited to '3rdparty/lua/src/lobject.c')
-rw-r--r-- | 3rdparty/lua/src/lobject.c | 69 |
1 files changed, 38 insertions, 31 deletions
diff --git a/3rdparty/lua/src/lobject.c b/3rdparty/lua/src/lobject.c index 6a24aff95d9..e24723febef 100644 --- a/3rdparty/lua/src/lobject.c +++ b/3rdparty/lua/src/lobject.c @@ -1,5 +1,5 @@ /* -** $Id: lobject.c,v 2.101 2014/12/26 14:43:45 roberto Exp $ +** $Id: lobject.c,v 2.108 2015/11/02 16:09:30 roberto Exp $ ** Some generic functions over Lua objects ** See Copyright Notice in lua.h */ @@ -10,6 +10,8 @@ #include "lprefix.h" +#include <locale.h> +#include <math.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> @@ -39,8 +41,12 @@ LUAI_DDEF const TValue luaO_nilobject_ = {NILCONSTANT}; int luaO_int2fb (unsigned int x) { int e = 0; /* exponent */ if (x < 8) return x; - while (x >= 0x10) { - x = (x+1) >> 1; + while (x >= (8 << 4)) { /* coarse steps */ + x = (x + 0xf) >> 4; /* x = ceil(x / 16) */ + e += 4; + } + while (x >= (8 << 1)) { /* fine steps */ + x = (x + 1) >> 1; /* x = ceil(x / 2) */ e++; } return ((e+1) << 3) | (cast_int(x) - 8); @@ -49,14 +55,15 @@ int luaO_int2fb (unsigned int x) { /* converts back */ int luaO_fb2int (int x) { - int e = (x >> 3) & 0x1f; - if (e == 0) return x; - else return ((x & 7) + 8) << (e - 1); + return (x < 8) ? x : ((x & 7) + 8) << ((x >> 3) - 1); } +/* +** Computes ceil(log2(x)) +*/ int luaO_ceillog2 (unsigned int x) { - static const lu_byte log_2[256] = { + 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, @@ -149,13 +156,13 @@ void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2, } /* could not perform raw operation; try metamethod */ lua_assert(L != NULL); /* should not fail when folding (compile time) */ - luaT_trybinTM(L, p1, p2, res, cast(TMS, op - LUA_OPADD + TM_ADD)); + 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; + else return (ltolower(c) - 'a') + 10; } @@ -172,9 +179,8 @@ static int isneg (const char **s) { ** Lua's implementation for 'lua_strx2number' ** =================================================================== */ -#if !defined(lua_strx2number) -#include <math.h> +#if !defined(lua_strx2number) /* maximum number of significant digits to read (to avoid overflows even with single floats) */ @@ -185,21 +191,22 @@ static int isneg (const char **s) { ** C99 specification for 'strtod' */ static lua_Number lua_strx2number (const char *s, char **endptr) { + int dot = lua_getlocaledecpoint(); lua_Number r = 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 dot = 0; /* true after seen a dot */ + int hasdot = 0; /* true after seen a dot */ *endptr = cast(char *, s); /* nothing is valid yet */ while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */ neg = isneg(&s); /* check signal */ if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */ return 0.0; /* invalid format (no '0x') */ for (s += 2; ; s++) { /* skip '0x' and read numeral */ - if (*s == '.') { - if (dot) break; /* second dot? stop loop */ - else dot = 1; + 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)? */ @@ -207,7 +214,7 @@ static lua_Number lua_strx2number (const char *s, char **endptr) { else if (++sigdig <= MAXSIGDIG) /* can read it without overflow? */ r = (r * cast_num(16.0)) + luaO_hexavalue(*s); else e++; /* too many digits; ignore, but still count for exponent */ - if (dot) e--; /* decimal digit? correct exponent */ + if (hasdot) e--; /* decimal digit? correct exponent */ } else break; /* neither a dot nor a digit */ } @@ -244,7 +251,7 @@ static const char *l_str2d (const char *s, lua_Number *result) { *result = lua_strx2number(s, &endptr); else *result = lua_str2number(s, &endptr); - if (endptr == s) return 0; /* nothing recognized */ + if (endptr == s) return NULL; /* nothing recognized */ while (lisspace(cast_uchar(*endptr))) endptr++; return (*endptr == '\0' ? endptr : NULL); /* OK if no trailing characters */ } @@ -290,7 +297,7 @@ size_t luaO_str2num (const char *s, TValue *o) { } else return 0; /* conversion failed */ - return (e - s + 1); /* success; return string size */ + return (e - s) + 1; /* success; return string size */ } @@ -324,12 +331,12 @@ void luaO_tostring (lua_State *L, StkId obj) { size_t len; lua_assert(ttisnumber(obj)); if (ttisinteger(obj)) - len = lua_integer2str(buff, ivalue(obj)); + len = lua_integer2str(buff, sizeof(buff), ivalue(obj)); else { - len = lua_number2str(buff, fltvalue(obj)); + len = lua_number2str(buff, sizeof(buff), fltvalue(obj)); #if !defined(LUA_COMPAT_FLOATSTRING) if (buff[strspn(buff, "-0123456789")] == '\0') { /* looks like an int? */ - buff[len++] = '.'; + buff[len++] = lua_getlocaledecpoint(); buff[len++] = '0'; /* adds '.0' to result */ } #endif @@ -339,7 +346,8 @@ void luaO_tostring (lua_State *L, StkId obj) { static void pushstr (lua_State *L, const char *str, size_t l) { - setsvalue2s(L, L->top++, luaS_newlstr(L, str, l)); + setsvalue2s(L, L->top, luaS_newlstr(L, str, l)); + luaD_inctop(L); } @@ -350,7 +358,6 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { for (;;) { const char *e = strchr(fmt, '%'); if (e == NULL) break; - luaD_checkstack(L, 2); /* fmt + item */ pushstr(L, fmt, e - fmt); switch (*(e+1)) { case 's': { @@ -368,23 +375,23 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { break; } case 'd': { - setivalue(L->top++, va_arg(argp, int)); - luaO_tostring(L, L->top - 1); - break; + setivalue(L->top, va_arg(argp, int)); + goto top2str; } case 'I': { - setivalue(L->top++, cast(lua_Integer, va_arg(argp, l_uacInt))); - luaO_tostring(L, L->top - 1); - break; + setivalue(L->top, cast(lua_Integer, va_arg(argp, l_uacInt))); + goto top2str; } case 'f': { - setfltvalue(L->top++, cast_num(va_arg(argp, l_uacNumber))); + setfltvalue(L->top, cast_num(va_arg(argp, l_uacNumber))); + top2str: + luaD_inctop(L); luaO_tostring(L, L->top - 1); break; } case 'p': { char buff[4*sizeof(void *) + 8]; /* should be enough space for a '%p' */ - int l = sprintf(buff, "%p", va_arg(argp, void *)); + int l = l_sprintf(buff, sizeof(buff), "%p", va_arg(argp, void *)); pushstr(L, buff, l); break; } |