diff options
Diffstat (limited to 'src/lobject.js')
| -rw-r--r-- | src/lobject.js | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/src/lobject.js b/src/lobject.js index 7c81045..7174ef6 100644 --- a/src/lobject.js +++ b/src/lobject.js @@ -446,36 +446,32 @@ const MAXBY10 = Math.floor(llimit.MAX_INT / 10); const MAXLASTD = llimit.MAX_INT % 10; const l_str2int = function(s) { + let i = 0; let a = 0; let empty = true; let neg; - while (ljstype.lisspace(s[0])) s = s.slice(1); /* skip initial spaces */ - neg = s[0] === char['-']; - - if (neg || s[0] === char['+']) - s = s.slice(1); - - if (s[0] === char['0'] && (s[1] === char['x'] || s[1] === char['X'])) { /* hex? */ - s = s.slice(2); /* skip '0x' */ + while (ljstype.lisspace(s[i])) i++; /* skip initial spaces */ + if ((neg = (s[i] === char['-']))) i++; + else if (s[i] === char['+']) i++; + if (s[i] === char['0'] && (s[i+1] === char['x'] || s[i+1] === char['X'])) { /* hex? */ + i += 2; /* skip '0x' */ - for (; ljstype.lisxdigit(s[0]); s = s.slice(1)) { - a = (a * 16 + luaO_hexavalue(s[0]))|0; + for (; ljstype.lisxdigit(s[i]); i++) { + a = (a * 16 + luaO_hexavalue(s[i]))|0; empty = false; } } else { /* decimal */ - for (; ljstype.lisdigit(s[0]); s = s.slice(1)) { - let d = s[0] - char['0']; + for (; ljstype.lisdigit(s[i]); i++) { + let d = s[i] - char['0']; if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */ return null; /* do not accept it (as integer) */ a = (a * 10 + d)|0; empty = false; } } - - while (ljstype.lisspace(s[0])) s = s.slice(1); /* skip trailing spaces */ - - if (empty || (s.length !== 0)) return null; /* something wrong in the numeral */ + while (ljstype.lisspace(s[i])) i++; /* skip trailing spaces */ + if (empty || (i !== s.length)) return null; /* something wrong in the numeral */ else { return (neg ? -a : a)|0; } |