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changed the tokenizer not to read ahead before returning a token

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This commit is contained in:
hyunghwan.chung 2016-09-23 08:56:25 +00:00
parent 2ea673dc23
commit 52d3e2528e
4 changed files with 129 additions and 80 deletions
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169
stix/lib/comp.c
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@ -80,32 +80,32 @@ static struct voca_t
stix_oow_t len;
stix_ooch_t str[11];
} vocas[] = {
{ 4, { 'b','y','t','e' } },
{ 9, { 'c','h','a','r','a','c','t','e','r' } },
{ 5, { 'c','l','a','s','s' } },
{ 9, { 'c','l','a','s','s','i','n','s','t' } },
{ 3, { 'd','c','l' } },
{ 7, { 'd','e','c','l','a','r','e' } },
{ 5, { '#','b','y','t','e' } },
{ 10, { '#','c','h','a','r','a','c','t','e','r' } },
{ 6, { '#','c','l','a','s','s' } },
{ 10, { '#','c','l','a','s','s','i','n','s','t' } },
{ 4, { '#','d','c','l' } },
{ 8, { '#','d','e','c','l','a','r','e' } },
{ 6, { 'e','n','s','u','r','e', } },
{ 9, { 'e','x','c','e','p','t','i','o','n' } },
{ 6, { 'e','x','t','e','n','d' } },
{ 7, { '#','e','x','t','e','n','d' } },
{ 5, { 'f','a','l','s','e' } },
{ 8, { 'h','a','l','f','w','o','r','d' } },
{ 7, { 'i','n','c','l','u','d','e' } },
{ 6, { 'l','i','w','o','r','d' } },
{ 4, { 'm','a','i','n' } },
{ 6, { 'm','e','t','h','o','d' } },
{ 3, { 'm','t','h' } },
{ 9, { '#','h','a','l','f','w','o','r','d' } },
{ 8, { '#','i','n','c','l','u','d','e' } },
{ 7, { '#','l','i','w','o','r','d' } },
{ 5, { '#','m','a','i','n' } },
{ 7, { '#','m','e','t','h','o','d' } },
{ 4, { '#','m','t','h' } },
{ 3, { 'n','i','l' } },
{ 7, { 'p','o','i','n','t','e','r' } },
{ 7, { 'p','o','o','l','d','i','c' } },
{ 8, { '#','p','o','i','n','t','e','r' } },
{ 8, { '#','p','o','o','l','d','i','c' } },
{ 10, { 'p','r','i','m','i','t','i','v','e',':' } },
{ 4, { 's','e','l','f' } },
{ 5, { 's','u','p','e','r' } },
{ 11, { 't','h','i','s','C','o','n','t','e','x','t' } },
{ 11, { 't','h','i','s','P','r','o','c','e','s','s' } },
{ 4, { 't','r','u','e' } },
{ 4, { 'w','o','r','d' } },
{ 5, { '#','w','o','r','d' } },
{ 1, { '|' } },
{ 1, { '>' } },
@ -546,8 +546,8 @@ static stix_oop_t string_to_num (stix_t* stix, stix_oocs_t* str, int radixed)
static STIX_INLINE int does_token_name_match (stix_t* stix, voca_id_t id)
{
return stix->c->tok.name.len == vocas[id].len &&
stix_equalchars(stix->c->tok.name.ptr, vocas[id].str, vocas[id].len);
return TOKEN_NAME_LEN(stix) == vocas[id].len &&
stix_equalchars(TOKEN_NAME_PTR(stix), vocas[id].str, vocas[id].len);
}
static STIX_INLINE int is_token_symbol (stix_t* stix, voca_id_t id)
@ -679,7 +679,7 @@ static int get_char (stix_t* stix)
return 1; /* indicate that a normal character has been read */
}
static int skip_spaces (stix_t* stix)
static STIX_INLINE int skip_spaces (stix_t* stix)
{
while (is_spacechar(stix->c->lxc.c)) GET_CHAR (stix);
return 0;
@ -705,7 +705,7 @@ static int skip_comment (stix_t* stix)
}
while (c != '"');
if (c == '"') GET_CHAR (stix);
if (c == '"') GET_CHAR (stix); /* keep the next character in lxc */
return 1; /* double-quoted comment */
}
@ -728,7 +728,7 @@ static int skip_comment (stix_t* stix)
}
else if (c == '\r' || c == '\n')
{
GET_CHAR (stix);
GET_CHAR (stix); /* keep the first meaningful character in lxc */
break;
}
}
@ -737,7 +737,7 @@ static int skip_comment (stix_t* stix)
return 1; /* single line comment led by ## or #! */
}
/* unget '#' */
/* unget the leading '#' */
unget_char (stix, &stix->c->lxc);
/* restore the previous state */
stix->c->lxc = lc;
@ -820,13 +820,20 @@ static int get_ident (stix_t* stix, stix_ooci_t char_read_ahead)
while (is_identchar(c));
if (c == '.') goto read_more_seg;
else unget_char (stix, &stix->c->lxc);
}
else
{
unget_char (stix, &stix->c->lxc);
stix->c->lxc = period;
/* unget the period itself */
unget_char (stix, &period);
}
}
else
{
unget_char (stix, &stix->c->lxc);
}
/* handle reserved words */
if (is_token_word(stix, VOCA_SELF))
@ -935,6 +942,8 @@ static int get_numlit (stix_t* stix, int negated)
SET_TOKEN_TYPE (stix, STIX_IOTOK_RADNUMLIT);
}
unget_char (stix, &stix->c->lxc);
/*
* TODO: handle floating point number
*/
@ -957,7 +966,6 @@ static int get_charlit (stix_t* stix)
SET_TOKEN_TYPE (stix, STIX_IOTOK_CHARLIT);
ADD_TOKEN_CHAR(stix, c);
GET_CHAR (stix);
return 0;
}
@ -989,10 +997,13 @@ static int get_strlit (stix_t* stix)
}
while (c != '\'');
/* 'c' must be a single quote at this point*/
GET_CHAR_TO (stix, c);
}
while (c == '\'');
while (c == '\''); /* if the next character is a single quote,
it becomes a literal single quote character. */
unget_char (stix, &stix->c->lxc);
return 0;
}
@ -1088,8 +1099,6 @@ static int get_string (stix_t* stix, stix_ooch_t end_char, stix_ooch_t esc_char,
if (escaped == 0 && c == end_char)
{
/* terminating quote */
/*GET_CHAR_TO (stix, c);*/
GET_CHAR (stix);
break;
}
@ -1171,21 +1180,25 @@ static int get_binsel (stix_t* stix)
/* special case if a minus is followed by a digit immediately */
if (oc == '-' && is_digitchar(stix->c->lxc.c)) return get_numlit (stix, 1);
#if 1
/* up to 2 characters only */
if (is_binselchar (stix->c->lxc.c))
{
ADD_TOKEN_CHAR (stix, stix->c->lxc.c);
GET_CHAR (stix);
}
else
{
unget_char (stix, &stix->c->lxc);
}
#else
/* or up to any occurrences */
/*
while (is_binselchar(stix->c->lxc.c))
{
ADD_TOKEN_CHAR (stix, c);
GET_CHAR (stix);
}
*/
unget_char (stix, &stix->c->lxc);
#endif
SET_TOKEN_TYPE (stix, STIX_IOTOK_BINSEL);
return 0;
@ -1197,9 +1210,13 @@ static int get_token (stix_t* stix)
int n;
retry:
GET_CHAR (stix);
do
{
if (skip_spaces(stix) <= -1) return -1;
/* skip spaces */
while (is_spacechar(stix->c->lxc.c)) GET_CHAR (stix);
/* the first character after the last space is in stix->c->lxc */
if ((n = skip_comment(stix)) <= -1) return -1;
}
while (n >= 1);
@ -1207,8 +1224,8 @@ retry:
/* clear the token name, reset its location */
SET_TOKEN_TYPE (stix, STIX_IOTOK_EOF); /* is it correct? */
CLEAR_TOKEN_NAME (stix);
stix->c->tok.loc = stix->c->lxc.l; /* remember token location */
stix->c->tok.loc = stix->c->lxc.l;
c = stix->c->lxc.c;
switch (c)
@ -1244,15 +1261,19 @@ retry:
{
SET_TOKEN_TYPE (stix, STIX_IOTOK_ASSIGN);
ADD_TOKEN_CHAR (stix, c);
GET_CHAR (stix);
}
else
{
unget_char (stix, &stix->c->lxc);
}
break;
case '^':
SET_TOKEN_TYPE (stix, STIX_IOTOK_RETURN);
ADD_TOKEN_CHAR(stix, c);
GET_CHAR_TO (stix, c);
#if 0
GET_CHAR_TO (stix, c);
/* TODO: support explicit block return */
if (c == '^')
{
@ -1260,6 +1281,10 @@ retry:
TOKEN_TYPE(stix) == STIX_IOTOK_BLKRET;
ADD_TOKEN_CHAR (stix, c);
}
else
{
unget_char (stix, &stix->c->lxc);
}
#endif
break;
@ -1289,9 +1314,7 @@ retry:
goto single_char_token;
case '#':
/*
* The hash sign is not the part of the token name.
* ADD_TOKEN_CHAR(stix, c); */
ADD_TOKEN_CHAR(stix, c);
GET_CHAR_TO (stix, c);
switch (c)
{
@ -1303,14 +1326,12 @@ retry:
/* #( */
ADD_TOKEN_CHAR(stix, c);
SET_TOKEN_TYPE (stix, STIX_IOTOK_ARPAREN);
GET_CHAR (stix);
break;
case '[':
/* #[ - byte array literal */
ADD_TOKEN_CHAR(stix, c);
SET_TOKEN_TYPE (stix, STIX_IOTOK_BAPAREN);
GET_CHAR (stix);
break;
case '\'':
@ -1334,6 +1355,8 @@ retry:
GET_CHAR_TO (stix, c);
}
while (is_binselchar(c));
unget_char (stix, &stix->c->lxc);
}
else if (is_leadidentchar(c))
{
@ -1370,6 +1393,10 @@ retry:
return -1;
}
}
else
{
unget_char (stix, &stix->c->lxc);
}
}
else if (c == '.')
{
@ -1393,13 +1420,18 @@ retry:
while (is_identchar(c));
if (c == '.') goto read_more_seg;
else unget_char (stix, &stix->c->lxc);
}
else
{
unget_char (stix, &stix->c->lxc);
stix->c->lxc = period;
unget_char (stix, &period);
}
}
else
{
unget_char (stix, &stix->c->lxc);
}
}
else
{
@ -1488,15 +1520,14 @@ retry:
single_char_token:
ADD_TOKEN_CHAR(stix, c);
GET_CHAR (stix);
break;
}
/*stix_logbfmt (stix, STIX_FMTOUT_COMPILER | STIX_FMTOUT_DEBUG, "TOKEN: [%.*S]\n", stix->c->tok.name.len, stix->c->tok.name.ptr);*/
STIX_DEBUG2 (stix, "TOKEN: [%.*S]\n", (stix_ooi_t)stix->c->tok.name.len, stix->c->tok.name.ptr);
return 0;
}
static void clear_io_names (stix_t* stix)
{
stix_iolink_t* cur;
@ -1568,7 +1599,7 @@ static int begin_include (stix_t* stix)
/* read in the first character in the included file.
* so the next call to get_token() sees the character read
* from this file. */
if (get_char(stix) <= -1 || get_token(stix) <= -1)
if (get_token(stix) <= -1)
{
end_include (stix);
/* i don't jump to oops since i've called
@ -1898,11 +1929,11 @@ static int add_string_literal (stix_t* stix, const stix_oocs_t* str, stix_oow_t*
return add_literal (stix, lit, index);
}
static int add_symbol_literal (stix_t* stix, const stix_oocs_t* str, stix_oow_t* index)
static int add_symbol_literal (stix_t* stix, const stix_oocs_t* str, int offset, stix_oow_t* index)
{
stix_oop_t tmp;
tmp = stix_makesymbol (stix, str->ptr, str->len);
tmp = stix_makesymbol (stix, str->ptr + offset, str->len - offset);
if (!tmp) return -1;
return add_literal (stix, tmp, index);
@ -2681,18 +2712,25 @@ static int compile_method_primitive (stix_t* stix)
break;
case STIX_IOTOK_SYMLIT:
prim_no = stix_getprimno (stix, TOKEN_NAME(stix));
{
const stix_ooch_t* tptr;
stix_oow_t tlen;
tptr = TOKEN_NAME_PTR(stix) + 1;
tlen = TOKEN_NAME_LEN(stix) - 1;
prim_no = stix_getprimno (stix, tptr, tlen);
if (prim_no <= -1)
{
const stix_ooch_t* us;
/* the primitive is not found */
us = stix_findoochar (stix->c->tok.name.ptr, stix->c->tok.name.len, '_');
if (us > stix->c->tok.name.ptr && us < stix->c->tok.name.ptr + stix->c->tok.name.len - 1)
us = stix_findoochar (tptr, tlen, '_');
if (us > tptr && us < tptr + tlen - 1)
{
stix_oow_t lit_idx;
/* the symbol literal contains an underscore.
* and it is none of the first of the last character */
if (add_symbol_literal(stix, TOKEN_NAME(stix), &lit_idx) >= 0 &&
* and it is neither the first nor the last character */
if (add_symbol_literal(stix, TOKEN_NAME(stix), 1, &lit_idx) >= 0 &&
STIX_OOI_IN_METHOD_PREAMBLE_INDEX_RANGE(lit_idx))
{
stix->c->mth.prim_type = 2; /* named primitive */
@ -2713,6 +2751,7 @@ static int compile_method_primitive (stix_t* stix)
stix->c->mth.prim_type = 1;
stix->c->mth.prim_no = prim_no;
break;
}
default:
set_syntax_error (stix, STIX_SYNERR_INTEGER, TOKEN_LOC(stix), TOKEN_NAME(stix));
@ -3290,19 +3329,22 @@ static int __read_array_literal (stix_t* stix, stix_oop_t* xlit)
break;
case STIX_IOTOK_STRLIT:
lit = stix_instantiate (stix, stix->_string, stix->c->tok.name.ptr, stix->c->tok.name.len);
lit = stix_instantiate (stix, stix->_string, TOKEN_NAME_PTR(stix), TOKEN_NAME_LEN(stix));
break;
case STIX_IOTOK_SYMLIT:
lit = stix_makesymbol (stix, TOKEN_NAME_PTR(stix) + 1, TOKEN_NAME_LEN(stix) - 1);
break;
case STIX_IOTOK_IDENT:
case STIX_IOTOK_IDENT_DOTTED:
case STIX_IOTOK_BINSEL:
case STIX_IOTOK_KEYWORD:
case STIX_IOTOK_SYMLIT:
case STIX_IOTOK_SELF:
case STIX_IOTOK_SUPER:
case STIX_IOTOK_THIS_CONTEXT:
case STIX_IOTOK_THIS_PROCESS:
lit = stix_makesymbol (stix, stix->c->tok.name.ptr, stix->c->tok.name.len);
lit = stix_makesymbol (stix, TOKEN_NAME_PTR(stix), TOKEN_NAME_LEN(stix));
break;
case STIX_IOTOK_NIL:
@ -3555,7 +3597,7 @@ static int compile_expression_primary (stix_t* stix, const stix_oocs_t* ident, c
break;
case STIX_IOTOK_SYMLIT:
if (add_symbol_literal(stix, TOKEN_NAME(stix), &index) <= -1 ||
if (add_symbol_literal(stix, TOKEN_NAME(stix), 1, &index) <= -1 ||
emit_single_param_instruction(stix, BCODE_PUSH_LITERAL_0, index) <= -1) return -1;
GET_TOKEN (stix);
break;
@ -3649,7 +3691,7 @@ static int compile_unary_message (stix_t* stix, int to_super)
do
{
if (add_symbol_literal(stix, TOKEN_NAME(stix), &index) <= -1 ||
if (add_symbol_literal(stix, TOKEN_NAME(stix), 0, &index) <= -1 ||
emit_double_param_instruction(stix, send_message_cmd[to_super], 0, index) <= -1) return -1;
GET_TOKEN (stix);
}
@ -3688,7 +3730,7 @@ static int compile_binary_message (stix_t* stix, int to_super)
* to be free from reallocation risk for the recursive call
* to compile_expression_primary(). */
binsel.ptr = &stix->c->mth.binsels.ptr[binsel_offset];
if (add_symbol_literal(stix, &binsel, &index) <= -1 ||
if (add_symbol_literal(stix, &binsel, 0, &index) <= -1 ||
emit_double_param_instruction(stix, send_message_cmd[to_super], 1, index) <= -1) goto oops;
stix->c->mth.binsels.len = saved_binsels_len;
@ -3750,7 +3792,7 @@ static int compile_keyword_message (stix_t* stix, int to_super)
kwsel.ptr = &stix->c->mth.kwsels.ptr[saved_kwsel_len];
kwsel.len = stix->c->mth.kwsels.len - saved_kwsel_len;
if (add_symbol_literal(stix, &kwsel, &index) <= -1 ||
if (add_symbol_literal(stix, &kwsel, 0, &index) <= -1 ||
emit_double_param_instruction(stix, send_message_cmd[to_super], nargs, index) <= -1) goto oops;
stix->c->mth.kwsels.len = saved_kwsel_len;
@ -4953,7 +4995,7 @@ static int __compile_pooldic_definition (stix_t* stix)
while (TOKEN_TYPE(stix) == STIX_IOTOK_SYMLIT)
{
lit = stix_makesymbol (stix, stix->c->tok.name.ptr, stix->c->tok.name.len);
lit = stix_makesymbol (stix, TOKEN_NAME_PTR(stix) + 1, TOKEN_NAME_LEN(stix) - 1);
if (!lit || add_to_array_literal_buffer (stix, lit) <= -1) return -1;
GET_TOKEN (stix);
@ -4986,12 +5028,12 @@ static int __compile_pooldic_definition (stix_t* stix)
goto add_literal;
case STIX_IOTOK_STRLIT:
lit = stix_instantiate (stix, stix->_string, stix->c->tok.name.ptr, stix->c->tok.name.len);
lit = stix_instantiate (stix, stix->_string, TOKEN_NAME_PTR(stix), TOKEN_NAME_LEN(stix));
if (!lit) return -1;
goto add_literal;
case STIX_IOTOK_SYMLIT:
lit = stix_makesymbol (stix, stix->c->tok.name.ptr, stix->c->tok.name.len);
lit = stix_makesymbol (stix, TOKEN_NAME_PTR(stix) + 1, TOKEN_NAME_LEN(stix) - 1);
if (!lit) return -1;
goto add_literal;
@ -5086,10 +5128,8 @@ static int compile_pooldic_definition (stix_t* stix)
return n;
}
static int compile_stream (stix_t* stix)
{
GET_CHAR (stix);
GET_TOKEN (stix);
while (TOKEN_TYPE(stix) != STIX_IOTOK_EOF)
@ -5131,7 +5171,6 @@ static int compile_stream (stix_t* stix)
}
#endif
else
{
set_syntax_error(stix, STIX_SYNERR_DIRECTIVE, TOKEN_LOC(stix), TOKEN_NAME(stix));

4
stix/lib/exec.c
View File

@ -2747,13 +2747,13 @@ static prim_t primitives[] =
};
int stix_getprimno (stix_t* stix, const stix_oocs_t* name)
int stix_getprimno (stix_t* stix, const stix_ooch_t* ptr, stix_oow_t len)
{
int i;
for (i = 0; i < STIX_COUNTOF(primitives); i++)
{
if (stix_compucxbcstr(name->ptr, name->len, primitives[i].name) == 0)
if (stix_compucxbcstr(ptr, len, primitives[i].name) == 0)
{
return i;
}

18
stix/lib/main.c
View File

@ -204,24 +204,31 @@ static STIX_INLINE stix_ooi_t close_input (stix_t* stix, stix_ioarg_t* arg)
static STIX_INLINE stix_ooi_t read_input (stix_t* stix, stix_ioarg_t* arg)
{
xtn_t* xtn = stix_getxtn(stix);
/*xtn_t* xtn = hcl_getxtn(hcl);*/
bb_t* bb;
stix_oow_t n, bcslen, ucslen, remlen;
stix_oow_t bcslen, ucslen, remlen;
int x;
bb = (bb_t*)arg->handle;
STIX_ASSERT (bb != STIX_NULL && bb->fp != STIX_NULL);
n = fread (&bb->buf[bb->len], STIX_SIZEOF(bb->buf[0]), STIX_COUNTOF(bb->buf) - bb->len, bb->fp);
if (n == 0)
do
{
x = fgetc (bb->fp);
if (x == EOF)
{
if (ferror((FILE*)bb->fp))
{
stix_seterrnum (stix, STIX_EIOERR);
return -1;
}
break;
}
bb->len += n;
bb->buf[bb->len++] = x;
}
while (bb->len < STIX_COUNTOF(bb->buf) && x != '\r' && x != '\n');
bcslen = bb->len;
ucslen = STIX_COUNTOF(arg->buf);
x = stix_utf8toucs (bb->buf, &bcslen, arg->buf, &ucslen);
@ -754,6 +761,7 @@ int main (int argc, char* argv[])
}
}
printf ("COMPILE OK. STARTING EXECUTION ...\n");
xret = 0;
g_stix = stix;
setup_tick ();

4
stix/lib/stix-prv.h
View File

@ -1321,9 +1321,11 @@ STIX_EXPORT void stix_getsynerr (
/* ========================================================================= */
/* exec.c */
/* ========================================================================= */
int stix_getprimno (
stix_t* stix,
const stix_oocs_t* name
const stix_ooch_t* ptr,
stix_oow_t len
);
/* TODO: remove debugging functions */