fixed a couple of awk parsing bugs
- lost token in an expression like bash | xyz + 20 for the way preget_token() was used. - wrong redirection handling in an expression like print 1,2,3 > (4)
This commit is contained in:
parent
f070058372
commit
12b8ad7cc9
@ -180,6 +180,13 @@ struct qse_awk_t
|
||||
|
||||
/* maximum number of local variables */
|
||||
qse_size_t nlcls_max;
|
||||
|
||||
/* some data to find if an expression is
|
||||
* enclosed in parentheses or not.
|
||||
* see parse_primary_lparen() and parse_print() in parse.c
|
||||
*/
|
||||
qse_size_t lparen_seq;
|
||||
qse_size_t lparen_last_closed;
|
||||
} parse;
|
||||
|
||||
/* source code management */
|
||||
|
||||
@ -194,7 +194,7 @@ static qse_awk_nde_t* parse_block_dc (
|
||||
static qse_awk_nde_t* parse_statement (
|
||||
qse_awk_t* awk, const qse_awk_loc_t* xloc);
|
||||
|
||||
static qse_awk_nde_t* parse_expr_dc (
|
||||
static qse_awk_nde_t* parse_expr_withdc (
|
||||
qse_awk_t* awk, const qse_awk_loc_t* xloc);
|
||||
|
||||
static qse_awk_nde_t* parse_logical_or (
|
||||
@ -972,7 +972,7 @@ static int parse_progunit (qse_awk_t* awk)
|
||||
awk->parse.id.block = PARSE_PATTERN;
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
ptn = parse_expr_dc (awk, &eloc);
|
||||
ptn = parse_expr_withdc (awk, &eloc);
|
||||
if (ptn == QSE_NULL) return -1;
|
||||
|
||||
QSE_ASSERT (ptn->next == QSE_NULL);
|
||||
@ -986,7 +986,7 @@ static int parse_progunit (qse_awk_t* awk)
|
||||
}
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
ptn->next = parse_expr_dc (awk, &eloc);
|
||||
ptn->next = parse_expr_withdc (awk, &eloc);
|
||||
|
||||
if (ptn->next == QSE_NULL)
|
||||
{
|
||||
@ -2062,7 +2062,7 @@ static qse_awk_nde_t* parse_if (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
if (get_token(awk) <= -1) return QSE_NULL;
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
test = parse_expr_dc (awk, &eloc);
|
||||
test = parse_expr_withdc (awk, &eloc);
|
||||
if (test == QSE_NULL) goto oops;
|
||||
|
||||
if (!MATCH(awk,TOK_RPAREN))
|
||||
@ -2135,7 +2135,7 @@ static qse_awk_nde_t* parse_while (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
if (get_token(awk) <= -1) goto oops;
|
||||
|
||||
ploc = awk->tok.loc;
|
||||
test = parse_expr_dc (awk, &ploc);
|
||||
test = parse_expr_withdc (awk, &ploc);
|
||||
if (test == QSE_NULL) goto oops;
|
||||
|
||||
if (!MATCH(awk,TOK_RPAREN))
|
||||
@ -2193,7 +2193,7 @@ static qse_awk_nde_t* parse_for (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
int no_foreach = MATCH(awk,TOK_LPAREN);
|
||||
|
||||
ploc = awk->tok.loc;
|
||||
init = parse_expr_dc (awk, &ploc);
|
||||
init = parse_expr_withdc (awk, &ploc);
|
||||
if (init == QSE_NULL) goto oops;
|
||||
|
||||
if (!no_foreach && init->type == QSE_AWK_NDE_EXP_BIN &&
|
||||
@ -2247,7 +2247,7 @@ static qse_awk_nde_t* parse_for (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
if (!MATCH(awk,TOK_SEMICOLON))
|
||||
{
|
||||
ploc = awk->tok.loc;
|
||||
test = parse_expr_dc (awk, &ploc);
|
||||
test = parse_expr_withdc (awk, &ploc);
|
||||
if (test == QSE_NULL) goto oops;
|
||||
|
||||
if (!MATCH(awk,TOK_SEMICOLON))
|
||||
@ -2268,7 +2268,7 @@ static qse_awk_nde_t* parse_for (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
{
|
||||
{
|
||||
qse_awk_loc_t eloc = awk->tok.loc;
|
||||
incr = parse_expr_dc (awk, &eloc);
|
||||
incr = parse_expr_withdc (awk, &eloc);
|
||||
if (incr == QSE_NULL) goto oops;
|
||||
}
|
||||
|
||||
@ -2344,7 +2344,7 @@ static qse_awk_nde_t* parse_dowhile (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
if (get_token(awk) <= -1) goto oops;
|
||||
|
||||
ploc = awk->tok.loc;
|
||||
test = parse_expr_dc (awk, &ploc);
|
||||
test = parse_expr_withdc (awk, &ploc);
|
||||
if (test == QSE_NULL) goto oops;
|
||||
|
||||
if (!MATCH(awk,TOK_RPAREN))
|
||||
@ -2449,7 +2449,7 @@ static qse_awk_nde_t* parse_return (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
else
|
||||
{
|
||||
qse_awk_loc_t eloc = awk->tok.loc;
|
||||
val = parse_expr_dc (awk, &eloc);
|
||||
val = parse_expr_withdc (awk, &eloc);
|
||||
if (val == QSE_NULL)
|
||||
{
|
||||
QSE_AWK_FREE (awk, nde);
|
||||
@ -2487,7 +2487,7 @@ static qse_awk_nde_t* parse_exit (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
else
|
||||
{
|
||||
qse_awk_loc_t eloc = awk->tok.loc;
|
||||
val = parse_expr_dc (awk, &eloc);
|
||||
val = parse_expr_withdc (awk, &eloc);
|
||||
if (val == QSE_NULL)
|
||||
{
|
||||
QSE_AWK_FREE (awk, nde);
|
||||
@ -2648,6 +2648,17 @@ static qse_awk_nde_t* parse_print (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
qse_awk_nde_t* args_tail;
|
||||
qse_awk_nde_t* tail_prev;
|
||||
|
||||
int in_parens = 0, gm_in_parens = 0;
|
||||
qse_size_t opening_lparen_seq;
|
||||
|
||||
if (MATCH(awk,TOK_LPAREN))
|
||||
{
|
||||
/* just remember the sequence number of the left
|
||||
* parenthesis before calling parse_expr_withdc()
|
||||
* that eventually calls parse_primary_lparen() */
|
||||
opening_lparen_seq = awk->parse.lparen_seq;
|
||||
in_parens = 1; /* maybe. not confirmed yet */
|
||||
|
||||
/* print and printf provide weird syntaxs.
|
||||
*
|
||||
* 1. print 10, 20;
|
||||
@ -2655,11 +2666,13 @@ static qse_awk_nde_t* parse_print (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
* 3. print (10,20,30) in a;
|
||||
* 4. print ((10,20,30) in a);
|
||||
*
|
||||
* Due the case 3, i can't consume LPAREN
|
||||
* Due to case 3, i can't consume LPAREN
|
||||
* here and expect RPAREN later.
|
||||
*/
|
||||
}
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
args = parse_expr_dc (awk, &eloc);
|
||||
args = parse_expr_withdc (awk, &eloc);
|
||||
if (args == QSE_NULL) goto oops;
|
||||
|
||||
args_tail = args;
|
||||
@ -2669,6 +2682,7 @@ static qse_awk_nde_t* parse_print (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
{
|
||||
/* args->type == QSE_AWK_NDE_GRP when print (a, b, c)
|
||||
* args->type != QSE_AWK_NDE_GRP when print a, b, c */
|
||||
qse_size_t group_opening_lparen_seq;
|
||||
|
||||
while (MATCH(awk,TOK_COMMA))
|
||||
{
|
||||
@ -2678,19 +2692,60 @@ static qse_awk_nde_t* parse_print (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
}
|
||||
while (MATCH(awk,TOK_NEWLINE));
|
||||
|
||||
/* if it's grouped, i must check if the last group member
|
||||
* is enclosed in parentheses.
|
||||
*
|
||||
* i set the condition to false whenever i see
|
||||
* a new group member. */
|
||||
gm_in_parens = 0;
|
||||
if (MATCH(awk,TOK_LPAREN))
|
||||
{
|
||||
group_opening_lparen_seq = awk->parse.lparen_seq;
|
||||
gm_in_parens = 1; /* maybe */
|
||||
}
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
args_tail->next = parse_expr_dc (awk, &eloc);
|
||||
args_tail->next = parse_expr_withdc (awk, &eloc);
|
||||
if (args_tail->next == QSE_NULL) goto oops;
|
||||
|
||||
tail_prev = args_tail;
|
||||
args_tail = args_tail->next;
|
||||
|
||||
if (gm_in_parens == 1 && awk->ptok.type == TOK_RPAREN &&
|
||||
awk->parse.lparen_last_closed == group_opening_lparen_seq)
|
||||
{
|
||||
/* confirm that the last group seen so far
|
||||
* is parenthesized */
|
||||
gm_in_parens = 2;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* print 1 > 2 would print 1 to the file named 2.
|
||||
* print (1 > 2) would print (1 > 2) on the console */
|
||||
if (awk->ptok.type != TOK_RPAREN &&
|
||||
args_tail->type == QSE_AWK_NDE_EXP_BIN)
|
||||
* print (1 > 2) would print (1 > 2) on the console
|
||||
*
|
||||
* think of all these... there are many more possible combinations.
|
||||
*
|
||||
* print ((10,20,30) in a) > "x";
|
||||
* print ((10,20,30) in a)
|
||||
* print ((10,20,30) in a) > ("x");
|
||||
* print ((10,20,30) in a) > (("x"));
|
||||
* function abc() { return "abc"; } BEGIN { print (1 > abc()); }
|
||||
* function abc() { return "abc"; } BEGIN { print 1 > abc(); }
|
||||
* print 1, 2, 3 > 4;
|
||||
* print (1, 2, 3) > 4;
|
||||
* print ((1, 2, 3) > 4);
|
||||
* print 1, 2, 3 > 4 + 5;
|
||||
* print 1, 2, (3 > 4) > 5;
|
||||
* print 1, 2, (3 > 4) > 5 + 6;
|
||||
*/
|
||||
if (in_parens == 1 && awk->ptok.type == TOK_RPAREN &&
|
||||
awk->parse.lparen_last_closed == opening_lparen_seq)
|
||||
{
|
||||
in_parens = 2; /* confirmed */
|
||||
}
|
||||
|
||||
if (in_parens != 2 && gm_in_parens != 2 && args_tail->type == QSE_AWK_NDE_EXP_BIN)
|
||||
{
|
||||
int i;
|
||||
qse_awk_nde_exp_t* ep = (qse_awk_nde_exp_t*)args_tail;
|
||||
@ -2762,7 +2817,7 @@ static qse_awk_nde_t* parse_print (qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
if (get_token(awk) <= -1) goto oops;
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
out = parse_expr_dc (awk, &eloc);
|
||||
out = parse_expr_withdc (awk, &eloc);
|
||||
if (out == QSE_NULL) goto oops;
|
||||
}
|
||||
}
|
||||
@ -2887,11 +2942,11 @@ static qse_awk_nde_t* parse_statement_nb (
|
||||
if (get_token(awk) <= -1) return QSE_NULL;
|
||||
nde = parse_print (awk, xloc);
|
||||
}
|
||||
else nde = parse_expr_dc (awk, xloc);
|
||||
else nde = parse_expr_withdc (awk, xloc);
|
||||
}
|
||||
else
|
||||
{
|
||||
nde = parse_expr_dc (awk, xloc);
|
||||
nde = parse_expr_withdc (awk, xloc);
|
||||
}
|
||||
|
||||
if (nde == QSE_NULL) return QSE_NULL;
|
||||
@ -3033,7 +3088,7 @@ static qse_awk_nde_t* parse_expr_basic (
|
||||
}
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
n1 = parse_expr_dc (awk, &eloc);
|
||||
n1 = parse_expr_withdc (awk, &eloc);
|
||||
if (n1 == QSE_NULL)
|
||||
{
|
||||
qse_awk_clrpt (awk, nde);
|
||||
@ -3055,7 +3110,7 @@ static qse_awk_nde_t* parse_expr_basic (
|
||||
}
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
n2 = parse_expr_dc (awk, &eloc);
|
||||
n2 = parse_expr_withdc (awk, &eloc);
|
||||
if (n2 == QSE_NULL)
|
||||
{
|
||||
qse_awk_clrpt (awk, nde);
|
||||
@ -3120,7 +3175,7 @@ static qse_awk_nde_t* parse_expr (
|
||||
|
||||
{
|
||||
qse_awk_loc_t eloc = awk->tok.loc;
|
||||
y = parse_expr_dc (awk, &eloc);
|
||||
y = parse_expr_withdc (awk, &eloc);
|
||||
}
|
||||
if (y == QSE_NULL)
|
||||
{
|
||||
@ -3149,11 +3204,13 @@ static qse_awk_nde_t* parse_expr (
|
||||
return (qse_awk_nde_t*)nde;
|
||||
}
|
||||
|
||||
static qse_awk_nde_t* parse_expr_dc (
|
||||
static qse_awk_nde_t* parse_expr_withdc (
|
||||
qse_awk_t* awk, const qse_awk_loc_t* xloc)
|
||||
{
|
||||
qse_awk_nde_t* nde;
|
||||
|
||||
/* perform depth check before parsing expression */
|
||||
|
||||
if (awk->opt.depth.s.expr_parse > 0 &&
|
||||
awk->parse.depth.expr >= awk->opt.depth.s.expr_parse)
|
||||
{
|
||||
@ -4338,13 +4395,16 @@ static qse_awk_nde_t* parse_primary_lparen (qse_awk_t* awk, const qse_awk_loc_t*
|
||||
qse_awk_nde_t* nde;
|
||||
qse_awk_nde_t* last;
|
||||
qse_awk_loc_t eloc;
|
||||
qse_size_t opening_lparen_seq;
|
||||
|
||||
opening_lparen_seq = awk->parse.lparen_seq++;
|
||||
|
||||
/* eat up the left parenthesis */
|
||||
if (get_token(awk) <= -1) return QSE_NULL;
|
||||
|
||||
/* parse the sub-expression inside the parentheses */
|
||||
eloc = awk->tok.loc;
|
||||
nde = parse_expr_dc (awk, &eloc);
|
||||
nde = parse_expr_withdc (awk, &eloc);
|
||||
if (nde == QSE_NULL) return QSE_NULL;
|
||||
|
||||
/* parse subsequent expressions separated by a comma, if any */
|
||||
@ -4362,7 +4422,7 @@ static qse_awk_nde_t* parse_primary_lparen (qse_awk_t* awk, const qse_awk_loc_t*
|
||||
while (MATCH(awk,TOK_NEWLINE));
|
||||
|
||||
eloc = awk->tok.loc;
|
||||
tmp = parse_expr_dc (awk, &eloc);
|
||||
tmp = parse_expr_withdc (awk, &eloc);
|
||||
if (tmp == QSE_NULL) goto oops;
|
||||
|
||||
QSE_ASSERT (tmp->next == QSE_NULL);
|
||||
@ -4378,6 +4438,10 @@ static qse_awk_nde_t* parse_primary_lparen (qse_awk_t* awk, const qse_awk_loc_t*
|
||||
goto oops;
|
||||
}
|
||||
|
||||
/* remember the sequence number of the left parenthesis
|
||||
* that' been just closed by the matching right parenthesis */
|
||||
awk->parse.lparen_last_closed = opening_lparen_seq;
|
||||
|
||||
if (get_token(awk) <= -1) goto oops;
|
||||
|
||||
/* check if it is a chained node */
|
||||
@ -4492,7 +4556,7 @@ novar:
|
||||
|
||||
ploc = awk->tok.loc;
|
||||
/* TODO: is this correct? */
|
||||
/*nde->in = parse_expr_dc (awk, &ploc);*/
|
||||
/*nde->in = parse_expr_withdc (awk, &ploc);*/
|
||||
nde->in = parse_primary (awk, &ploc);
|
||||
if (nde->in == QSE_NULL) goto oops;
|
||||
|
||||
@ -5077,7 +5141,7 @@ static qse_awk_nde_t* parse_hashidx (
|
||||
|
||||
{
|
||||
qse_awk_loc_t eloc = awk->tok.loc;
|
||||
tmp = parse_expr_dc (awk, &eloc);
|
||||
tmp = parse_expr_withdc (awk, &eloc);
|
||||
}
|
||||
if (tmp == QSE_NULL)
|
||||
{
|
||||
@ -5236,7 +5300,7 @@ static qse_awk_nde_t* parse_fncall (
|
||||
while (1)
|
||||
{
|
||||
eloc = awk->tok.loc;
|
||||
nde = parse_expr_dc (awk, &eloc);
|
||||
nde = parse_expr_withdc (awk, &eloc);
|
||||
if (nde == QSE_NULL) goto oops;
|
||||
|
||||
if (head == QSE_NULL) head = nde;
|
||||
@ -5843,6 +5907,7 @@ static int get_symbols (qse_awk_t* awk, qse_cint_t c, qse_awk_tok_t* tok)
|
||||
/* note that the loop below is not generaic enough.
|
||||
* you must keep the operators strings in a particular order */
|
||||
|
||||
|
||||
for (p = ops; p->str != QSE_NULL; )
|
||||
{
|
||||
if (p->opt == 0 || (awk->opt.trait & p->opt))
|
||||
@ -6089,7 +6154,46 @@ static int get_token (qse_awk_t* awk)
|
||||
|
||||
static int preget_token (qse_awk_t* awk)
|
||||
{
|
||||
/* LIMITATION: no more than one token can be pre-read in a row
|
||||
without consumption. */
|
||||
|
||||
if (QSE_STR_LEN(awk->ntok.name) > 0)
|
||||
{
|
||||
/* you can't read more than 1 token in advance.
|
||||
*
|
||||
* if there is a token already read in, it is just
|
||||
* retained.
|
||||
*
|
||||
* parsing an expression like '$0 | a' causes this
|
||||
* funtion to be called before get_token() consumes the
|
||||
* pre-read token.
|
||||
*
|
||||
* Because the expression like this
|
||||
* print $1 | getline x;
|
||||
* must be parsed as
|
||||
* print $(1 | getline x);
|
||||
* preget_token() is called from parse_primary().
|
||||
*
|
||||
* For the expression '$0 | $2',
|
||||
* 1) parse_primary() calls parse_primary_positional() if $ is encountered.
|
||||
* 2) parse_primary_positional() calls parse_primary() recursively for the positional part after $.
|
||||
* 3) parse_primary() in #2 calls preget_token()
|
||||
* 4) parse_primary() in #1 also calls preget_token().
|
||||
*
|
||||
* this block is reached because no token is consumed between #3 and #4.
|
||||
*
|
||||
* in short, it happens if getline doesn't doesn't follow | after the positional.
|
||||
* $1 | $2
|
||||
* $1 | abc + 20
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* if there is no token pre-read, we get a new
|
||||
* token and place it to awk->ntok. */
|
||||
return get_token_into (awk, &awk->ntok);
|
||||
}
|
||||
}
|
||||
|
||||
static int classify_ident (qse_awk_t* awk, const qse_cstr_t* name)
|
||||
|
||||
@ -178,7 +178,7 @@ PROGS="
|
||||
lang-049.awk!!!--newline=on -d-
|
||||
|
||||
columnate.awk!passwd.dat!!--newline=on -F:
|
||||
levenshtein-utests.awk!!!--newline=on --extrakws=on
|
||||
levenshtein-utests.awk!!!--newline=on
|
||||
rcalc.awk!!!--newline=on -v target=89000
|
||||
quicksort.awk!quicksort.dat!!
|
||||
quicksort2.awk!quicksort2.dat!!-vQSEAWK=\"${QSEAWK}\" -vSCRIPT_PATH=\"${SCRIPT_DIR}\"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user