diff options
Diffstat (limited to 'src/lutf8lib.js')
| -rw-r--r-- | src/lutf8lib.js | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/lutf8lib.js b/src/lutf8lib.js index bc43d54..db5f7ad 100644 --- a/src/lutf8lib.js +++ b/src/lutf8lib.js @@ -8,7 +8,8 @@ const lauxlib = require('./lauxlib.js'); const iscont = function(p) { - return p & 0xC0 === 0x80; + let c = p & 0xC0; + return c === 0x80; }; /* translate a relative string position: negative means back from end */ @@ -24,6 +25,7 @@ const u_posrelat = function(pos, len) { */ const byteoffset = function(L) { let s = lauxlib.luaL_checkstring(L, 1); + s = L.stack[lapi.index2addr_(L, 1)].value; let n = lauxlib.luaL_checkinteger(L, 2); let posi = n >= 0 ? 1 : s.length + 1; posi = u_posrelat(lauxlib.luaL_optinteger(L, 3, posi), s.length); @@ -31,16 +33,16 @@ const byteoffset = function(L) { if (n === 0) { /* find beginning of current byte sequence */ - while (posi > 0 && iscont(s.slice(posi))) posi--; + while (posi > 0 && iscont(s[posi])) posi--; } else { - if (iscont(s.slice(posi))) + if (iscont(s[posi])) lauxlib.luaL_error(L, "initial position is a continuation byte"); if (n < 0) { while (n < 0 && posi > 0) { /* move back */ do { /* find beginning of previous character */ posi--; - } while (posi > 0 && iscont(s.slice(posi))); + } while (posi > 0 && iscont(s[posi])); n++; } } else { @@ -48,7 +50,7 @@ const byteoffset = function(L) { while (n > 0 && posi < s.length) { do { /* find beginning of next character */ posi++; - } while (iscont(s.slice(posi))); /* (cannot pass final '\0') */ + } while (iscont(s[posi])); /* (cannot pass final '\0') */ n--; } } |