static int llex(LexState *ls, TValue *tv)
{
lj_str_resetbuf(&ls->sb);
for (;;) {
if (lj_char_isident(ls->current)) {
GCstr *s;
if (lj_char_isdigit(ls->current)) { /* Numeric literal. */
lex_number(ls, tv);
return TK_number;
}
/* Identifier or reserved word. */
do {
save_and_next(ls);
} while (lj_char_isident(ls->current));
s = lj_parse_keepstr(ls, ls->sb.buf, ls->sb.n);
setstrV(ls->L, tv, s);
if (s->reserved > 0) /* Reserved word? */
return TK_OFS + s->reserved;
return TK_name;
}
switch (ls->current) {
case '\n':
case '\r':
inclinenumber(ls);
continue;
case ' ':
case '\t':
case '\v':
case '\f':
next(ls);
continue;
case '-':
next(ls);
if (ls->current != '-') return '-';
/* else is a comment */
next(ls);
if (ls->current == '[') {
int sep = skip_sep(ls);
lj_str_resetbuf(&ls->sb); /* `skip_sep' may dirty the buffer */
if (sep >= 0) {
read_long_string(ls, NULL, sep); /* long comment */
lj_str_resetbuf(&ls->sb);
continue;
}
}
/* else short comment */
while (!currIsNewline(ls) && ls->current != END_OF_STREAM)
next(ls);
continue;
case '[': {
int sep = skip_sep(ls);
if (sep >= 0) {
read_long_string(ls, tv, sep);
return TK_string;
} else if (sep == -1) {
return '[';
} else {
lj_lex_error(ls, TK_string, LJ_ERR_XLDELIM);
continue;
}
}
case '=':
next(ls);
if (ls->current != '=') return '='; else { next(ls); return TK_eq; }
case '<':
next(ls);
if (ls->current != '=') return '<'; else { next(ls); return TK_le; }
case '>':
next(ls);
if (ls->current != '=') return '>'; else { next(ls); return TK_ge; }
case '~':
next(ls);
if (ls->current != '=') return '~'; else { next(ls); return TK_ne; }
case ':':
next(ls);
if (ls->current != ':') return ':'; else { next(ls); return TK_label; }
case '"':
case '\'':
read_string(ls, ls->current, tv);
return TK_string;
case '.':
save_and_next(ls);
if (ls->current == '.') {
next(ls);
if (ls->current == '.') {
next(ls);
return TK_dots; /* ... */
}
return TK_concat; /* .. */
} else if (!lj_char_isdigit(ls->current)) {
return '.';
} else {
lex_number(ls, tv);
return TK_number;
}
case END_OF_STREAM:
return TK_eof;
default: {
int c = ls->current;
next(ls);
return c; /* Single-char tokens (+ - / ...). */
}
}
}
}
static int llex (LexState *ls, SemInfo *seminfo) {
luaZ_resetbuffer(ls->buff);
for (;;) {
switch (ls->current) {
case '\n': case '\r': { /* line breaks */
inclinenumber(ls);
break;
}
case ' ': case '\f': case '\t': case '\v': { /* spaces */
next(ls);
break;
}
case '-': { /* '-' or '--' (comment) */
next(ls);
if (ls->current != '-') return '-';
/* else is a comment */
next(ls);
if (ls->current == '[') { /* long comment? */
int sep = skip_sep(ls);
luaZ_resetbuffer(ls->buff); /* 'skip_sep' may dirty the buffer */
if (sep >= 0) {
read_long_string(ls, NULL, sep); /* skip long comment */
luaZ_resetbuffer(ls->buff); /* previous call may dirty the buff. */
break;
}
}
/* else short comment */
while (!currIsNewline(ls) && ls->current != EOZ)
next(ls); /* skip until end of line (or end of file) */
break;
}
case '[': { /* long string or simply '[' */
int sep = skip_sep(ls);
if (sep >= 0) {
read_long_string(ls, seminfo, sep);
return TK_STRING;
}
else if (sep != -1) /* '[=...' missing second bracket */
lexerror(ls, "invalid long string delimiter", TK_STRING);
return '[';
}
case '=': {
next(ls);
if (check_next1(ls, '=')) return TK_EQ;
else return '=';
}
case '<': {
next(ls);
if (check_next1(ls, '=')) return TK_LE;
else if (check_next1(ls, '<')) return TK_SHL;
else return '<';
}
case '>': {
next(ls);
if (check_next1(ls, '=')) return TK_GE;
else if (check_next1(ls, '>')) return TK_SHR;
else return '>';
}
case '/': {
next(ls);
if (check_next1(ls, '/')) return TK_IDIV;
else return '/';
}
case '~': {
next(ls);
if (check_next1(ls, '=')) return TK_NE;
else return '~';
}
case ':': {
next(ls);
if (check_next1(ls, ':')) return TK_DBCOLON;
else return ':';
}
case '"': case '\'': { /* short literal strings */
read_string(ls, ls->current, seminfo);
return TK_STRING;
}
case '`': { /* relative paths */
read_string(ls, ls->current, seminfo);
return TK_PATH;
}
case '.': { /* '.', '..', '...', or number */
save_and_next(ls);
if (check_next1(ls, '.')) {
if (check_next1(ls, '.'))
return TK_DOTS; /* '...' */
else return TK_CONCAT; /* '..' */
}
else if (!lisdigit(ls->current)) return '.';
else return read_numeral(ls, seminfo);
}
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
return read_numeral(ls, seminfo);
}
case EOZ: {
return TK_EOS;
}
default: {
if (lislalpha(ls->current)) { /* identifier or reserved word? */
TString *ts;
do {
save_and_next(ls);
} while (lislalnum(ls->current));
ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
luaZ_bufflen(ls->buff));
seminfo->ts = ts;
if (isreserved(ts)) /* reserved word? */
return ts->extra - 1 + FIRST_RESERVED;
else {
return TK_NAME;
}
}
else { /* single-char tokens (+ - / ...) */
int c = ls->current;
next(ls);
return c;
}
}
}
}
}
int luaX_lex (LexState *LS, SemInfo *seminfo) {
for (;;) {
switch (LS->current) {
case '\n': {
inclinenumber(LS);
continue;
}
case '-': {
next(LS);
if (LS->current != '-') return '-';
/* else is a comment */
next(LS);
if (LS->current == '[' && (next(LS), LS->current == '['))
read_long_string(LS, NULL); /* long comment */
else /* short comment */
while (LS->current != '\n' && LS->current != EOZ)
next(LS);
continue;
}
case '[': {
next(LS);
if (LS->current != '[') return '[';
else {
read_long_string(LS, seminfo);
return TK_STRING;
}
}
case '=': {
next(LS);
if (LS->current != '=') return '=';
else { next(LS); return TK_EQ; }
}
case '<': {
next(LS);
if (LS->current == '<') { next(LS); return TK_SHL; }
else if (LS->current != '=') return '<';
else { next(LS); return TK_LE; }
}
case '>': {
next(LS);
if (LS->current == '>') { next(LS); return TK_SHR; }
else if (LS->current != '=') return '>';
else { next(LS); return TK_GE; }
}
case '~': {
next(LS);
if (LS->current != '=') return '~';
else { next(LS); return TK_NE; }
}
case '"':
case '\'': {
read_string(LS, LS->current, seminfo);
return TK_STRING;
}
case '.': {
next(LS);
if (LS->current == '.') {
next(LS);
if (LS->current == '.') {
next(LS);
return TK_DOTS; /* ... */
}
else return TK_CONCAT; /* .. */
}
else if (!lex_isdigit(LS->current)) return '.';
else {
return read_numeral(LS, 1, seminfo);
}
}
case EOZ: {
return TK_EOS;
}
default: {
if (isspace(LS->current)) {
next(LS);
continue;
}
else if (lex_isdigit(LS->current)) {
return (read_numeral(LS, 0, seminfo));
}
else if (lex_isalpha(LS->current) || LS->current == '_') {
char saveCh = 0;
size_t l;
TString *ts;
if (LS->current == 'L')
{
next(LS);
if (LS->current == '"')
{
read_wstring(LS, LS->current, seminfo);
return TK_WSTRING;
}
saveCh = 'L';
}
/* identifier or reserved word */
l = readname(LS, saveCh);
ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);
if (ts->tsv.reserved > 0) /* reserved word? */
return ts->tsv.reserved - 1 + FIRST_RESERVED;
seminfo->ts = ts;
return TK_NAME;
}
else {
int c = LS->current;
if (iscntrl(c))
luaX_error(LS, "invalid control char",
luaO_pushfstring(LS->L, "char(%d)", c));
next(LS);
return c; /* single-char tokens (+ - / ...) */
}
}
}
}
}
int luaX_lex (LexState *LS, SemInfo *seminfo) {
for (;;) {
switch (LS->current) {
case ' ': case '\t': case '\r': /* `\r' to avoid problems with DOS */
next(LS);
continue;
case '\n':
inclinenumber(LS);
continue;
case '$':
luaX_error(LS, "unexpected `$' (pragmas are no longer supported)", '$');
break;
case '-':
next(LS);
if (LS->current != '-') return '-';
do { next(LS); } while (LS->current != '\n' && LS->current != EOZ);
continue;
case '[':
next(LS);
if (LS->current != '[') return '[';
else {
read_long_string(LS, seminfo);
return TK_STRING;
}
case '=':
next(LS);
if (LS->current != '=') return '=';
else { next(LS); return TK_EQ; }
case '<':
next(LS);
if (LS->current != '=') return '<';
else { next(LS); return TK_LE; }
case '>':
next(LS);
if (LS->current != '=') return '>';
else { next(LS); return TK_GE; }
case '~':
next(LS);
if (LS->current != '=') return '~';
else { next(LS); return TK_NE; }
case '"':
case '\'':
read_string(LS, LS->current, seminfo);
return TK_STRING;
case '.':
next(LS);
if (LS->current == '.') {
next(LS);
if (LS->current == '.') {
next(LS);
return TK_DOTS; /* ... */
}
else return TK_CONCAT; /* .. */
}
else if (!isdigit(LS->current)) return '.';
else {
read_number(LS, 1, seminfo);
return TK_NUMBER;
}
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
read_number(LS, 0, seminfo);
return TK_NUMBER;
case EOZ:
return TK_EOS;
case '_': goto tname;
default:
if (!isalpha(LS->current)) {
int c = LS->current;
if (iscntrl(c))
luaX_invalidchar(LS, c);
next(LS);
return c;
}
tname: { /* identifier or reserved word */
TString *ts = luaS_new(LS->L, readname(LS));
if (ts->marked >= RESERVEDMARK) /* reserved word? */
return ts->marked-RESERVEDMARK+FIRST_RESERVED;
seminfo->ts = ts;
return TK_NAME;
}
}
}
}
int luaX_lex (LexState *LS) {
luaL_resetbuffer();
for (;;) {
switch (LS->current) {
case ' ': case '\t': case '\r': /* CR: to avoid problems with DOS */
next(LS);
continue;
case '\n':
inclinenumber(LS);
continue;
case '-':
save_and_next(LS);
if (LS->current != '-') return '-';
do { next(LS); } while (LS->current != '\n' && LS->current != EOZ);
luaL_resetbuffer();
continue;
case '[':
save_and_next(LS);
if (LS->current != '[') return '[';
else {
save_and_next(LS); /* pass the second '[' */
return read_long_string(LS);
}
case '=':
save_and_next(LS);
if (LS->current != '=') return '=';
else { save_and_next(LS); return EQ; }
case '<':
save_and_next(LS);
if (LS->current != '=') return '<';
else { save_and_next(LS); return LE; }
case '>':
save_and_next(LS);
if (LS->current != '=') return '>';
else { save_and_next(LS); return GE; }
case '~':
save_and_next(LS);
if (LS->current != '=') return '~';
else { save_and_next(LS); return NE; }
case '"':
case '\'': {
int del = LS->current;
save_and_next(LS);
while (LS->current != del) {
switch (LS->current) {
case EOZ:
case '\n':
luaX_error(LS, "unfinished string");
return EOS; /* to avoid warnings */
case '\\':
next(LS); /* do not save the '\' */
switch (LS->current) {
case 'a': save('\a'); next(LS); break;
case 'b': save('\b'); next(LS); break;
case 'f': save('\f'); next(LS); break;
case 'n': save('\n'); next(LS); break;
case 'r': save('\r'); next(LS); break;
case 't': save('\t'); next(LS); break;
case 'v': save('\v'); next(LS); break;
case '\n': save('\n'); inclinenumber(LS); break;
default : {
if (isdigit(LS->current)) {
int c = 0;
int i = 0;
do {
c = 10*c + (LS->current-'0');
next(LS);
} while (++i<3 && isdigit(LS->current));
if (c != (unsigned char)c)
luaX_error(LS, "escape sequence too large");
save(c);
}
else { /* handles \, ", ', and ? */
save(LS->current);
next(LS);
}
break;
}
}
break;
default:
save_and_next(LS);
}
}
save_and_next(LS); /* skip delimiter */
LS->seminfo.ts = luaS_newlstr(L->Mbuffer+(L->Mbuffbase+1),
L->Mbuffnext-L->Mbuffbase-2);
return STRING;
}
case '.':
save_and_next(LS);
if (LS->current == '.')
{
save_and_next(LS);
if (LS->current == '.')
{
save_and_next(LS);
return DOTS; /* ... */
}
else return CONC; /* .. */
}
else if (!isdigit(LS->current)) return '.';
goto fraction; /* LS->current is a digit: goes through to number */
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
do {
save_and_next(LS);
} while (isdigit(LS->current));
if (LS->current == '.') {
save_and_next(LS);
if (LS->current == '.') {
save('.');
luaX_error(LS,
"ambiguous syntax (decimal point x string concatenation)");
}
}
fraction:
while (isdigit(LS->current))
save_and_next(LS);
if (toupper(LS->current) == 'E') {
save_and_next(LS); /* read 'E' */
save_and_next(LS); /* read '+', '-' or first digit */
while (isdigit(LS->current))
save_and_next(LS);
}
save('\0');
LS->seminfo.r = luaO_str2d(L->Mbuffer+L->Mbuffbase);
if (LS->seminfo.r < 0)
luaX_error(LS, "invalid numeric format");
return NUMBER;
case EOZ:
if (LS->iflevel > 0)
luaX_error(LS, "input ends inside a $if");
return EOS;
default:
if (LS->current != '_' && !isalpha(LS->current)) {
int c = LS->current;
if (iscntrl(c))
luaX_invalidchar(LS, c);
save_and_next(LS);
return c;
}
else { /* identifier or reserved word */
TaggedString *ts;
do {
save_and_next(LS);
} while (isalnum(LS->current) || LS->current == '_');
save('\0');
ts = luaS_new(L->Mbuffer+L->Mbuffbase);
if (ts->head.marked >= FIRST_RESERVED)
return ts->head.marked; /* reserved word */
LS->seminfo.ts = ts;
return NAME;
}
}
}
}
static int llex (tt_Lexer *L) {
for (;;) {
switch (ttL_current(L)) {
case '\n': case '\r': { /* line breaks */
ttL_inclinenumber(L);
break;
}
case ' ': case '\f': case '\t': case '\v': { /* spaces */
ttL_next(L);
break;
}
case '-': { /* '-' or '--' (comment) */
ttL_next(L);
if (ttL_current(L) != '-') return '-';
/* else is a comment */
ttL_next(L);
if (ttL_current(L) == '[') { /* long comment? */
int sep = skip_sep(L);
ttL_resetbuffer(L); /* `skip_sep' may dirty the buffer */
if (sep >= 0) {
read_long_string(L, 0, sep); /* skip long comment */
ttL_resetbuffer(L); /* previous call may dirty the buff. */
break;
}
}
/* else short comment */
while (!ttL_isnewline(L) && ttL_current(L) != TTL_EOZ)
ttL_next(L); /* skip until end of line (or end of file) */
break;
}
case '[': { /* long string or simply '[' */
int sep = skip_sep(L);
if (sep >= 0) {
read_long_string(L, 1, sep);
return TTK_STRING;
}
else if (sep == -1) return '[';
else ttL_lexerror(L, "invalid long string delimiter", TTK_STRING);
}
case '=': {
ttL_next(L);
if (ttL_current(L) != '=') return '=';
else { ttL_next(L); return TTK_EQ; }
}
case '<': {
ttL_next(L);
if (ttL_current(L) != '=') return '<';
else { ttL_next(L); return TTK_LE; }
}
case '>': {
ttL_next(L);
if (ttL_current(L) != '=') return '>';
else { ttL_next(L); return TTK_GE; }
}
case '~': {
ttL_next(L);
if (ttL_current(L) != '=') return '~';
else { ttL_next(L); return TTK_NE; }
}
case ':': {
ttL_next(L);
if (ttL_current(L) != ':') return ':';
else { ttL_next(L); return TTK_DBCOLON; }
}
case '"': case '\'': { /* short literal strings */
read_string(L, ttL_current(L));
return TTK_STRING;
}
case '.': { /* '.', '..', '...', or number */
ttL_save_and_next(L);
if (ttL_check_next(L, ".")) {
if (ttL_check_next(L, "."))
return TTK_DOTS; /* '...' */
else return TTK_CONCAT; /* '..' */
}
else if (!isdigit(ttL_current(L))) return '.';
/* else go through */
}
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
read_numeral(L);
return TTK_NUMBER;
}
case TTL_EOZ: {
return TTK_EOS;
}
default: {
if (isalpha(ttL_current(L)) || ttL_current(L) == '_') { /* identifier or reserved word? */
int reversed;
do {
ttL_save_and_next(L);
} while (isalnum(ttL_current(L)) || ttL_current(L) == '_');
if ((reversed = ttL_iskeyword(L, ltokens, TTK_LUA_NUM_RESERVED)) != 0)
return reversed + TTK_FIRST_REVERSED;
return TTK_NAME;
}
else { /* single-char tokens (+ - / ...) */
int c = ttL_current(L);
ttL_next(L);
return c;
}
}
}
}
}
int32 luaY_lex(YYSTYPE *l) {
LexState *LS = lua_state->lexstate;
double a;
luaL_resetbuffer();
if (lua_debug)
luaY_codedebugline(LS->linelasttoken);
LS->linelasttoken = LS->linenumber;
while (1) {
switch (LS->current) {
case ' ':
case '\t':
case '\r': // CR: to avoid problems with DOS
next(LS);
continue;
case '\n':
inclinenumber(LS);
LS->linelasttoken = LS->linenumber;
continue;
case '-':
save_and_next(LS);
if (LS->current != '-')
return '-';
do {
next(LS);
} while (LS->current != '\n' && LS->current != EOZ);
luaL_resetbuffer();
continue;
case '[':
save_and_next(LS);
if (LS->current != '[')
return '[';
else {
save_and_next(LS); // pass the second '['
return read_long_string(LS, l);
}
case '=':
save_and_next(LS);
if (LS->current != '=')
return '=';
else {
save_and_next(LS);
return EQ;
}
case '<':
save_and_next(LS);
if (LS->current != '=')
return '<';
else {
save_and_next(LS);
return LE;
}
case '>':
save_and_next(LS);
if (LS->current != '=')
return '>';
else {
save_and_next(LS);
return GE;
}
case '~':
save_and_next(LS);
if (LS->current != '=')
return '~';
else {
save_and_next(LS);
return NE;
}
case '"':
case '\'':
{
int32 del = LS->current;
save_and_next(LS);
while (LS->current != del) {
switch (LS->current) {
case EOZ:
case '\n':
save(0);
return WRONGTOKEN;
case '\\':
next(LS); // do not save the '\'
switch (LS->current) {
case 'n':
save('\n');
next(LS);
break;
case 't':
save('\t');
next(LS);
break;
case 'r':
save('\r');
next(LS);
break;
case '\n':
save('\n');
inclinenumber(LS);
break;
default :
save_and_next(LS); break;
}
break;
default:
save_and_next(LS);
}
}
next(LS); // skip delimiter
save(0);
l->pTStr = luaS_new(Mbuffbase + 1);
Mbuffer[Mbuffnext - 1] = del; // restore delimiter
return STRING;
}
case '.':
save_and_next(LS);
if (LS->current == '.') {
save_and_next(LS);
if (LS->current == '.') {
save_and_next(LS);
return DOTS; // ...
} else
return CONC; // ..
} else if (!Common::isDigit(LS->current))
return '.';
// LS->current is a digit: goes through to number/
a = 0.0;
goto fraction;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
a = 0.0;
do {
a = 10.0 * a + (LS->current - '0');
save_and_next(LS);
} while (Common::isDigit(LS->current));
if (LS->current == '.') {
save_and_next(LS);
if (LS->current == '.') {
save(0);
luaY_error("ambiguous syntax (decimal point x string concatenation)");
}
}
fraction:
{
double da = 0.1;
while (Common::isDigit(LS->current)) {
a += (LS->current - '0') * da;
da /= 10.0;
save_and_next(LS);
}
if (toupper(LS->current) == 'E') {
int32 e = 0;
int32 neg;
double ea;
save_and_next(LS);
neg = (LS->current == '-');
if (LS->current == '+' || LS->current == '-')
save_and_next(LS);
if (!Common::isDigit(LS->current)) {
save(0);
return WRONGTOKEN;
}
do {
e = 10 * e + (LS->current - '0');
save_and_next(LS);
} while (Common::isDigit(LS->current));
for (ea = neg ? 0.1 : 10.0; e > 0; e >>= 1) {
if (e & 1)
a *= ea;
ea *= ea;
}
}
l->vReal = a;
return NUMBER;
}
case EOZ:
save(0);
if (LS->iflevel > 0)
luaY_syntaxerror("input ends inside a $if", "");
return 0;
default:
if (LS->current != '_' && !Common::isAlpha(LS->current)) {
int32 c = LS->current;
save_and_next(LS);
return c;
} else { // identifier or reserved word
TaggedString *ts;
do {
save_and_next(LS);
} while (Common::isAlnum(LS->current) || LS->current == '_');
save(0);
ts = luaS_new(Mbuffbase);
if (ts->head.marked >= 255)
return ts->head.marked; // reserved word
l->pTStr = ts;
return NAME;
}
}
}
