1 /*******************************************************************************
2 Copyright (c) 2017, Michael Wallner <mike@php.net>.
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
8 * Redistributions of source code must retain the above copyright notice,
9 this list of conditions and the following disclaimer.
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
14 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
15 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
18 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
21 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
22 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *******************************************************************************/
26 #include "php_psi_stdinc.h"
32 void psi_cpp_tokiter_dump(int fd
, struct psi_cpp
*cpp
)
34 size_t i
= cpp
->index
;
42 while (psi_plist_get(cpp
->tokens
, i
, &T
)) {
43 dprintf(fd
, "PSI: CPP tokens %5zu %c ", i
, cpp
->index
== i
? '*' : ' ');
44 psi_token_dump(fd
, T
);
45 if (i
>= cpp
->index
+ 10) {
46 dprintf(fd
, "PSI: CPP tokens .....\n");
54 void psi_cpp_tokiter_reset(struct psi_cpp
*cpp
)
57 fprintf(stderr
, "PSI: CPP reset (%zu tokens)\n", psi_plist_count(cpp
->tokens
));
58 # if PSI_CPP_DEBUG > 1
59 psi_cpp_tokiter_dump(2, cpp
);
66 bool psi_cpp_tokiter_seek(struct psi_cpp
*cpp
, size_t index
)
68 if (index
< psi_plist_count(cpp
->tokens
)) {
75 struct psi_token
*psi_cpp_tokiter_current(struct psi_cpp
*cpp
)
77 struct psi_token
*current
= NULL
;
78 bool found
= psi_plist_get(cpp
->tokens
, cpp
->index
, ¤t
);
85 size_t psi_cpp_tokiter_index(struct psi_cpp
*cpp
)
90 void psi_cpp_tokiter_next(struct psi_cpp
*cpp
)
92 #if 0 && PSI_CPP_DEBUG
93 fprintf(stderr
, "PSI: CPP next -> index=%zu -> index=%zu\n", cpp
->index
, cpp
->index
+1);
98 void psi_cpp_tokiter_prev(struct psi_cpp
*cpp
)
100 #if 0 && PSI_CPP_DEBUG
101 fprintf(stderr
, "PSI: CPP prev -> index=%zu -> index=%zu\n", cpp
->index
, cpp
->index
-1);
108 bool psi_cpp_tokiter_valid(struct psi_cpp
*cpp
)
110 #if 0 && PSI_CPP_DEBUG
111 fprintf(stderr
, "PSI: CPP valid -> index=%zu -> %d\n", cpp
->index
, cpp
->index
< psi_plist_count(cpp
->tokens
));
113 return cpp
->index
< psi_plist_count(cpp
->tokens
);
116 bool psi_cpp_tokiter_del_cur(struct psi_cpp
*cpp
, bool free_token
)
118 struct psi_token
*cur
= NULL
;
119 bool deleted
= psi_plist_del(cpp
->tokens
, cpp
->index
, &cur
);
123 fprintf(stderr
, "PSI: CPP del_cur -> index=%zu, del=%d, free=%d, count=%zu ",
124 cpp
->index
, (int) deleted
, (int) free_token
, psi_plist_count(cpp
->tokens
));
126 psi_token_dump(2, cur
);
128 fprintf(stderr
, "NULL\n");
131 if (cur
&& free_token
) {
134 count
= psi_plist_count(cpp
->tokens
);
135 if (deleted
&& cpp
->index
>= count
) {
137 cpp
->index
= count
- 1;
145 bool psi_cpp_tokiter_del_range(struct psi_cpp
*cpp
, size_t offset
, size_t num_eles
, bool free_tokens
)
147 struct psi_token
**ptr
;
151 ptr
= calloc(num_eles
, sizeof(*ptr
));
157 fprintf(stderr
, "PSI: CPP del_range -> index=%zu, offset=%zu, num_eles=%zu, count=%zu\n",
158 cpp
->index
, offset
, num_eles
, psi_plist_count(cpp
->tokens
));
161 deleted
= psi_plist_del_r(cpp
->tokens
, offset
, num_eles
, (void *) ptr
);
164 size_t count
= psi_plist_count(cpp
->tokens
);
166 if (cpp
->index
>= count
) {
168 cpp
->index
= count
- 1;
186 bool psi_cpp_tokiter_ins_cur(struct psi_cpp
*cpp
, struct psi_token
*tok
)
188 struct psi_plist
*tokens
= psi_plist_ins(cpp
->tokens
, cpp
->index
, &tok
);
191 fprintf(stderr
, "PSI: CPP ins_cur -> index=%zu ", cpp
->index
);
192 psi_token_dump(2, tok
);
198 cpp
->tokens
= tokens
;
202 bool psi_cpp_tokiter_ins_range(struct psi_cpp
*cpp
, size_t offset
,
203 size_t num_eles
, void **eles
)
205 struct psi_plist
*tokens
;
211 tokens
= psi_plist_ins_r(cpp
->tokens
, offset
, num_eles
, eles
);
214 fprintf(stderr
, "PSI: CPP ins_range -> index=%zu, offset=%zu, num_eles=%zu, count=%zu\n",
215 cpp
->index
, offset
, num_eles
, psi_plist_count(tokens
));
221 cpp
->tokens
= tokens
;
225 bool psi_cpp_tokiter_defined(struct psi_cpp
*cpp
)
227 if (psi_cpp_tokiter_valid(cpp
)) {
228 struct psi_token
*current
= psi_cpp_tokiter_current(cpp
);
230 return psi_cpp_defined(cpp
, current
);
236 static size_t psi_cpp_tokiter_expand_tokens(struct psi_cpp
*cpp
,
237 struct psi_token
*target
, struct psi_plist
*tokens
)
239 if (tokens
&& psi_plist_count(tokens
)) {
241 bool stringify
= false, paste
= false;
242 struct psi_token
*tok
, **exp_tokens
= calloc(psi_plist_count(tokens
), sizeof(*exp_tokens
));
244 while (psi_plist_get(tokens
, i
++, &tok
)) {
245 struct psi_token
*new_tok
;
247 if (tok
->type
== PSI_T_EOL
) {
250 if (tok
->type
== PSI_T_HASH
) {
254 if (tok
->type
== PSI_T_CPP_PASTE
) {
259 if (paste
&& n
> 0 && exp_tokens
[n
- 1]) {
260 struct psi_token
*old_tok
= exp_tokens
[n
- 1];
262 new_tok
= psi_token_init(old_tok
->type
, "", 0,
263 target
->col
, target
->line
, target
->file
?:"");
265 new_tok
= psi_token_cat(NULL
, 2, new_tok
, old_tok
, tok
);
268 exp_tokens
[n
- 1] = new_tok
;
270 new_tok
= psi_token_init(stringify
? PSI_T_QUOTED_STRING
: tok
->type
,
271 tok
->text
, tok
->size
, target
->col
, target
->line
, target
->file
?:"");
273 exp_tokens
[n
++] = new_tok
;
277 fprintf(stderr
, "PSI: CPP expand > ");
278 psi_token_dump(2, tok
);
284 psi_cpp_tokiter_ins_range(cpp
, psi_cpp_tokiter_index(cpp
), n
, (void *) exp_tokens
);
293 static void psi_cpp_tokiter_free_call_tokens(struct psi_plist
**arg_tokens_list
, size_t arg_count
, bool free_tokens
)
297 for (i
= 0; i
< arg_count
; ++i
) {
298 if (arg_tokens_list
[i
]) {
300 struct psi_token
*tok
;
302 while (psi_plist_pop(arg_tokens_list
[i
], &tok
)) {
306 psi_plist_free(arg_tokens_list
[i
]);
309 free(arg_tokens_list
);
312 static struct psi_plist
**psi_cpp_tokiter_read_call_tokens(
313 struct psi_cpp
*cpp
, size_t arg_count
)
315 size_t arg_index
= 0, lparens
= 1, rparens
= 0;
316 struct psi_plist
**arg_tokens
= calloc(arg_count
, sizeof(*arg_tokens
));
317 struct psi_plist
*free_tokens
= psi_plist_init((psi_plist_dtor
) psi_token_free
);
318 struct psi_token
*tok
;
320 arg_tokens
[0] = psi_plist_init(NULL
);
322 /* free macro name token on success */
323 tok
= psi_cpp_tokiter_current(cpp
);
324 free_tokens
= psi_plist_add(free_tokens
, &tok
);
326 /* next token must be a LPAREN for a macro call */
327 psi_cpp_tokiter_next(cpp
);
328 tok
= psi_cpp_tokiter_current(cpp
);
329 if (!psi_cpp_tokiter_valid(cpp
) || tok
->type
!= PSI_T_LPAREN
) {
333 /* free LPAREN on success */
334 free_tokens
= psi_plist_add(free_tokens
, &tok
);
336 while (lparens
> rparens
) {
337 psi_cpp_tokiter_next(cpp
);
338 if (!psi_cpp_tokiter_valid(cpp
)) {
341 tok
= psi_cpp_tokiter_current(cpp
);
346 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
349 if (++rparens
== lparens
) {
351 if (arg_index
+ 1 < arg_count
) {
354 free_tokens
= psi_plist_add(free_tokens
, &tok
);
356 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
360 if (1 == (lparens
- rparens
)) {
361 /* too many commas? */
362 if (++arg_index
>= arg_count
) {
365 free_tokens
= psi_plist_add(free_tokens
, &tok
);
367 arg_tokens
[arg_index
] = psi_plist_init(NULL
);
369 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
373 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
377 psi_plist_free(free_tokens
);
381 psi_cpp_tokiter_free_call_tokens(arg_tokens
, arg_count
, false);
385 static void psi_cpp_tokiter_expand_call_tokens(struct psi_cpp
*cpp
,
386 struct psi_token
*target
, struct psi_cpp_macro_decl
*macro
,
387 struct psi_plist
**arg_tokens_list
)
390 struct psi_token
*tok
;
391 struct psi_plist
*tokens
= psi_plist_init(NULL
);
393 for (i
= 0; psi_plist_get(macro
->tokens
, i
, &tok
); ++i
) {
394 struct psi_plist
*arg_tokens
= NULL
;
396 if (tok
->type
== PSI_T_NAME
) {
398 struct psi_token
*arg_name
;
400 for (s
= 0; psi_plist_get(macro
->sig
, s
, &arg_name
); ++s
) {
401 if (arg_name
->size
== tok
->size
) {
402 if (!memcmp(arg_name
->text
, tok
->text
, tok
->size
)) {
403 arg_tokens
= arg_tokens_list
[s
];
411 tokens
= psi_plist_add_r(tokens
, psi_plist_count(arg_tokens
), psi_plist_eles(arg_tokens
));
413 tokens
= psi_plist_add(tokens
, &tok
);
417 psi_cpp_tokiter_expand_tokens(cpp
, target
, tokens
);
418 psi_plist_free(tokens
);
421 static bool psi_cpp_tokiter_expand_call(struct psi_cpp
*cpp
,
422 struct psi_token
*target
, struct psi_cpp_macro_decl
*macro
)
424 /* function-like macro
425 * #define FOO(a,b) a>b // macro->sig == {a, b}, macro->tokens = {a, >, b}
426 * # if FOO(1,2) // expands to if 1 > 2
428 size_t start
= psi_cpp_tokiter_index(cpp
);
429 struct psi_plist
**arg_tokens_list
;
431 /* read in tokens, until we have balanced parens */
432 arg_tokens_list
= psi_cpp_tokiter_read_call_tokens(cpp
, psi_plist_count(macro
->sig
));
433 if (!arg_tokens_list
) {
434 psi_cpp_tokiter_seek(cpp
, start
);
438 /* ditch arg tokens */
439 psi_cpp_tokiter_del_range(cpp
, start
, psi_cpp_tokiter_index(cpp
) - start
+ 1, false);
440 psi_cpp_tokiter_seek(cpp
, start
);
442 /* insert and expand macro tokens */
443 psi_cpp_tokiter_expand_call_tokens(cpp
, target
, macro
, arg_tokens_list
);
444 psi_cpp_tokiter_free_call_tokens(arg_tokens_list
, psi_plist_count(macro
->sig
), true);
446 /* back to where we took off */
447 psi_cpp_tokiter_seek(cpp
, start
);
452 static bool psi_cpp_tokiter_expand_def(struct psi_cpp
*cpp
,
453 struct psi_token
*target
, struct psi_cpp_macro_decl
*macro
)
455 size_t index
= psi_cpp_tokiter_index(cpp
);
457 /* delete current token from stream */
458 psi_cpp_tokiter_del_cur(cpp
, false);
460 if (index
!= psi_cpp_tokiter_index(cpp
)) {
461 /* might have been last token */
462 psi_cpp_tokiter_next(cpp
);
464 /* replace with tokens from macro */
465 psi_cpp_tokiter_expand_tokens(cpp
, target
, macro
->tokens
);
472 static inline int psi_cpp_tokiter_expand_cmp(struct psi_token
*t
,
473 struct psi_cpp_macro_decl
*m
)
475 if (psi_plist_count(m
->tokens
) == 1) {
478 psi_plist_get(m
->tokens
, 0, &r
);
480 return strcmp(r
->text
, t
->text
);
485 bool psi_cpp_tokiter_expand(struct psi_cpp
*cpp
)
487 if (psi_cpp_tokiter_valid(cpp
)) {
488 struct psi_token
*current
= psi_cpp_tokiter_current(cpp
);
491 struct psi_cpp_macro_decl
*macro
= zend_hash_str_find_ptr(
492 &cpp
->defs
, current
->text
, current
->size
);
494 /* don't expand itself */
495 if (macro
&& macro
->token
!= current
) {
497 fprintf(stderr
, "PSI: CPP expand < ");
498 psi_token_dump(2, current
);
501 return psi_cpp_tokiter_expand_call(cpp
, current
, macro
);
502 } else if (psi_cpp_tokiter_expand_cmp(current
, macro
)) {
503 return psi_cpp_tokiter_expand_def(cpp
, current
, macro
);