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 void psi_cpp_tokiter_expand_tokens(struct psi_cpp
*cpp
, struct psi_token
*target
,
237 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
);
289 static void psi_cpp_tokiter_free_call_tokens(struct psi_plist
**arg_tokens_list
, size_t arg_count
, bool free_tokens
)
293 for (i
= 0; i
< arg_count
; ++i
) {
294 if (arg_tokens_list
[i
]) {
296 struct psi_token
*tok
;
298 while (psi_plist_pop(arg_tokens_list
[i
], &tok
)) {
302 psi_plist_free(arg_tokens_list
[i
]);
305 free(arg_tokens_list
);
308 static struct psi_plist
**psi_cpp_tokiter_read_call_tokens(
309 struct psi_cpp
*cpp
, size_t arg_count
)
311 size_t arg_index
= 0, lparens
= 1, rparens
= 0;
312 struct psi_plist
**arg_tokens
= calloc(arg_count
, sizeof(*arg_tokens
));
313 struct psi_plist
*free_tokens
= psi_plist_init((psi_plist_dtor
) psi_token_free
);
314 struct psi_token
*tok
;
316 arg_tokens
[0] = psi_plist_init(NULL
);
318 /* free macro name token on success */
319 tok
= psi_cpp_tokiter_current(cpp
);
320 free_tokens
= psi_plist_add(free_tokens
, &tok
);
322 /* next token must be a LPAREN for a macro call */
323 psi_cpp_tokiter_next(cpp
);
324 tok
= psi_cpp_tokiter_current(cpp
);
325 if (!psi_cpp_tokiter_valid(cpp
) || tok
->type
!= PSI_T_LPAREN
) {
329 /* free LPAREN on success */
330 free_tokens
= psi_plist_add(free_tokens
, &tok
);
332 while (lparens
> rparens
) {
333 psi_cpp_tokiter_next(cpp
);
334 if (!psi_cpp_tokiter_valid(cpp
)) {
337 tok
= psi_cpp_tokiter_current(cpp
);
342 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
345 if (++rparens
== lparens
) {
347 if (arg_index
+ 1 < arg_count
) {
350 free_tokens
= psi_plist_add(free_tokens
, &tok
);
352 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
356 if (1 == (lparens
- rparens
)) {
357 /* too many commas? */
358 if (++arg_index
>= arg_count
) {
361 free_tokens
= psi_plist_add(free_tokens
, &tok
);
363 arg_tokens
[arg_index
] = psi_plist_init(NULL
);
365 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
369 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
373 psi_plist_free(free_tokens
);
377 psi_cpp_tokiter_free_call_tokens(arg_tokens
, arg_count
, false);
381 static void psi_cpp_tokiter_expand_call_tokens(struct psi_cpp
*cpp
,
382 struct psi_token
*target
, struct psi_cpp_macro_decl
*macro
,
383 struct psi_plist
**arg_tokens_list
)
386 struct psi_token
*tok
;
387 struct psi_plist
*tokens
= psi_plist_init(NULL
);
389 for (i
= 0; psi_plist_get(macro
->tokens
, i
, &tok
); ++i
) {
390 struct psi_plist
*arg_tokens
= NULL
;
392 if (tok
->type
== PSI_T_NAME
) {
394 struct psi_token
*arg_name
;
396 for (s
= 0; psi_plist_get(macro
->sig
, s
, &arg_name
); ++s
) {
397 if (arg_name
->size
== tok
->size
) {
398 if (!memcmp(arg_name
->text
, tok
->text
, tok
->size
)) {
399 arg_tokens
= arg_tokens_list
[s
];
407 tokens
= psi_plist_add_r(tokens
, psi_plist_count(arg_tokens
), psi_plist_eles(arg_tokens
));
409 tokens
= psi_plist_add(tokens
, &tok
);
413 psi_cpp_tokiter_expand_tokens(cpp
, target
, tokens
);
414 psi_plist_free(tokens
);
417 static bool psi_cpp_tokiter_expand_call(struct psi_cpp
*cpp
,
418 struct psi_token
*target
, struct psi_cpp_macro_decl
*macro
)
420 /* function-like macro
421 * #define FOO(a,b) a>b // macro->sig == {a, b}, macro->tokens = {a, >, b}
422 * # if FOO(1,2) // expands to if 1 > 2
424 size_t start
= psi_cpp_tokiter_index(cpp
);
425 struct psi_plist
**arg_tokens_list
;
427 /* read in tokens, until we have balanced parens */
428 arg_tokens_list
= psi_cpp_tokiter_read_call_tokens(cpp
, psi_plist_count(macro
->sig
));
429 if (!arg_tokens_list
) {
430 psi_cpp_tokiter_seek(cpp
, start
);
434 /* ditch arg tokens */
435 psi_cpp_tokiter_del_range(cpp
, start
, psi_cpp_tokiter_index(cpp
) - start
+ 1, false);
436 psi_cpp_tokiter_seek(cpp
, start
);
438 /* insert and expand macro tokens */
439 psi_cpp_tokiter_expand_call_tokens(cpp
, target
, macro
, arg_tokens_list
);
440 psi_cpp_tokiter_free_call_tokens(arg_tokens_list
, psi_plist_count(macro
->sig
), true);
442 /* back to where we took off */
443 psi_cpp_tokiter_seek(cpp
, start
);
448 bool psi_cpp_tokiter_expand(struct psi_cpp
*cpp
)
450 if (psi_cpp_tokiter_valid(cpp
)) {
451 struct psi_token
*current
= psi_cpp_tokiter_current(cpp
);
454 struct psi_cpp_macro_decl
*macro
= zend_hash_str_find_ptr(
455 &cpp
->defs
, current
->text
, current
->size
);
457 /* don't expand itself */
458 if (macro
&& macro
->token
!= current
) {
460 fprintf(stderr
, "PSI: CPP expand < ");
461 psi_token_dump(2, current
);
464 return psi_cpp_tokiter_expand_call(cpp
, current
, macro
);
466 size_t index
= psi_cpp_tokiter_index(cpp
);
468 /* delete current token from stream */
469 psi_cpp_tokiter_del_cur(cpp
, false);
471 if (index
!= psi_cpp_tokiter_index(cpp
)) {
472 /* might have been last token */
473 psi_cpp_tokiter_next(cpp
);
475 /* replace with tokens from macro */
476 psi_cpp_tokiter_expand_tokens(cpp
, current
, macro
->tokens
);