diff options
Diffstat (limited to 'source/extern/lua/lobject.c')
| -rw-r--r-- | source/extern/lua/lobject.c | 113 |
1 files changed, 78 insertions, 35 deletions
diff --git a/source/extern/lua/lobject.c b/source/extern/lua/lobject.c index 6c53b98..355bf58 100644 --- a/source/extern/lua/lobject.c +++ b/source/extern/lua/lobject.c @@ -1,5 +1,5 @@ /* -** $Id: lobject.c,v 2.104 2015/04/11 18:30:08 roberto Exp $ +** $Id: lobject.c,v 2.113.1.1 2017/04/19 17:29:57 roberto Exp $ ** Some generic functions over Lua objects ** See Copyright Notice in lua.h */ @@ -55,9 +55,7 @@ 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); } @@ -245,20 +243,59 @@ static lua_Number lua_strx2number (const char *s, char **endptr) { /* }====================================================== */ -static const char *l_str2d (const char *s, lua_Number *result) { +/* maximum length of a numeral */ +#if !defined (L_MAXLENNUM) +#define L_MAXLENNUM 200 +#endif + +static const char *l_str2dloc (const char *s, lua_Number *result, int mode) { char *endptr; - if (strpbrk(s, "nN")) /* reject 'inf' and 'nan' */ + *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 if no trailing characters */ +} + + +/* +** Convert string 's' to a Lua number (put in 'result'). Return NULL +** on fail or the address of the ending '\0' on success. +** 'pmode' points to (and 'mode' contains) special things in the string: +** - 'x'/'X' means an hexadecimal numeral +** - 'n'/'N' means 'inf' or 'nan' (which should be rejected) +** - '.' just optimizes the search for the common case (nothing special) +** 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. +*/ +static const char *l_str2d (const char *s, lua_Number *result) { + const char *endptr; + const char *pmode = strpbrk(s, ".xXnN"); + int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0; + if (mode == 'n') /* reject 'inf' and 'nan' */ return NULL; - else if (strpbrk(s, "xX")) /* hex? */ - *result = lua_strx2number(s, &endptr); - else - *result = lua_str2number(s, &endptr); - if (endptr == s) return NULL; /* nothing recognized */ - while (lisspace(cast_uchar(*endptr))) endptr++; - return (*endptr == '\0' ? endptr : NULL); /* OK if no trailing characters */ + 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 (strlen(s) > L_MAXLENNUM || pdot == NULL) + 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; @@ -275,7 +312,10 @@ static const char *l_str2int (const char *s, lua_Integer *result) { } else { /* decimal */ for (; lisdigit(cast_uchar(*s)); s++) { - a = a * 10 + *s - '0'; + 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; } } @@ -333,9 +373,9 @@ 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++] = lua_getlocaledecpoint(); @@ -348,27 +388,29 @@ 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); } -/* this function handles only '%d', '%c', '%f', '%p', and '%s' - conventional formats, plus Lua-specific '%I' and '%U' */ +/* +** this function handles only '%d', '%c', '%f', '%p', and '%s' + conventional formats, plus Lua-specific '%I' and '%U' +*/ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { int n = 0; 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': { + case 's': { /* zero-terminated string */ const char *s = va_arg(argp, char *); if (s == NULL) s = "(null)"; pushstr(L, s, strlen(s)); break; } - case 'c': { + case 'c': { /* an 'int' as a character */ char buff = cast(char, va_arg(argp, int)); if (lisprint(cast_uchar(buff))) pushstr(L, &buff, 1); @@ -376,28 +418,29 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { luaO_pushfstring(L, "<\\%d>", cast_uchar(buff)); break; } - case 'd': { - setivalue(L->top++, va_arg(argp, int)); - luaO_tostring(L, L->top - 1); - break; + case 'd': { /* an 'int' */ + 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; + case 'I': { /* a 'lua_Integer' */ + 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))); + case 'f': { /* a 'lua_Number' */ + setfltvalue(L->top, cast_num(va_arg(argp, l_uacNumber))); + top2str: /* convert the top element to a string */ + luaD_inctop(L); luaO_tostring(L, L->top - 1); break; } - case 'p': { + case 'p': { /* a pointer */ char buff[4*sizeof(void *) + 8]; /* should be enough space for a '%p' */ - int l = sprintf(buff, "%p", va_arg(argp, void *)); + void *p = va_arg(argp, void *); + int l = lua_pointer2str(buff, sizeof(buff), p); pushstr(L, buff, l); break; } - case 'U': { + case 'U': { /* an 'int' as a UTF-8 sequence */ char buff[UTF8BUFFSZ]; int l = luaO_utf8esc(buff, cast(long, va_arg(argp, long))); pushstr(L, buff + UTF8BUFFSZ - l, l); |