2ea9adc80a6411dbff8b2d20b08c591c8404245f
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_plist
*tokens
)
238 if (tokens
&& psi_plist_count(tokens
)) {
240 bool stringify
= false, paste
= false;
241 struct psi_token
*tok
, **exp_tokens
= calloc(psi_plist_count(tokens
), sizeof(*exp_tokens
));
243 while (psi_plist_get(tokens
, i
++, &tok
)) {
244 struct psi_token
*new_tok
;
246 if (tok
->type
== PSI_T_HASH
) {
256 if (paste
&& n
> 0 && exp_tokens
[n
- 1] &&
257 (new_tok
= psi_token_cat(NULL
, 2, exp_tokens
[n
- 1], tok
))) {
258 free(exp_tokens
[n
- 1]);
259 exp_tokens
[n
- 1] = new_tok
;
261 struct psi_token
*cpy
= psi_token_copy(tok
);
264 cpy
= psi_token_append(NULL
,
265 psi_token_prepend(NULL
, cpy
, 1, "\""), 1, "\"");
266 cpy
->type
= PSI_T_QUOTED_STRING
;
268 exp_tokens
[n
++] = cpy
;
272 fprintf(stderr
, "PSI: CPP expand > ");
273 psi_token_dump(2, tok
);
278 psi_cpp_tokiter_ins_range(cpp
, psi_cpp_tokiter_index(cpp
), n
, (void *) exp_tokens
);
283 static void psi_cpp_tokiter_free_call_tokens(struct psi_plist
**arg_tokens_list
, size_t arg_count
, bool free_tokens
)
287 for (i
= 0; i
< arg_count
; ++i
) {
288 if (arg_tokens_list
[i
]) {
290 struct psi_token
*tok
;
292 while (psi_plist_pop(arg_tokens_list
[i
], &tok
)) {
296 psi_plist_free(arg_tokens_list
[i
]);
299 free(arg_tokens_list
);
302 static struct psi_plist
**psi_cpp_tokiter_read_call_tokens(
303 struct psi_cpp
*cpp
, size_t arg_count
)
305 size_t arg_index
= 0, lparens
= 1, rparens
= 0;
306 struct psi_plist
**arg_tokens
= calloc(arg_count
, sizeof(*arg_tokens
));
307 struct psi_plist
*free_tokens
= psi_plist_init((psi_plist_dtor
) psi_token_free
);
308 struct psi_token
*tok
;
310 arg_tokens
[0] = psi_plist_init(NULL
);
312 /* free macro name token on success */
313 tok
= psi_cpp_tokiter_current(cpp
);
314 free_tokens
= psi_plist_add(free_tokens
, &tok
);
316 /* next token must be a LPAREN for a macro call */
317 psi_cpp_tokiter_next(cpp
);
318 tok
= psi_cpp_tokiter_current(cpp
);
319 if (!psi_cpp_tokiter_valid(cpp
) || tok
->type
!= PSI_T_LPAREN
) {
323 /* free LPAREN on success */
324 free_tokens
= psi_plist_add(free_tokens
, &tok
);
326 while (lparens
> rparens
) {
327 psi_cpp_tokiter_next(cpp
);
328 if (!psi_cpp_tokiter_valid(cpp
)) {
331 tok
= psi_cpp_tokiter_current(cpp
);
336 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
339 if (++rparens
== lparens
) {
341 if (arg_index
+ 1 < arg_count
) {
344 free_tokens
= psi_plist_add(free_tokens
, &tok
);
346 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
350 if (1 == (lparens
- rparens
)) {
351 /* too many commas? */
352 if (++arg_index
>= arg_count
) {
355 free_tokens
= psi_plist_add(free_tokens
, &tok
);
357 arg_tokens
[arg_index
] = psi_plist_init(NULL
);
359 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
363 arg_tokens
[arg_index
] = psi_plist_add(arg_tokens
[arg_index
], &tok
);
367 psi_plist_free(free_tokens
);
371 psi_cpp_tokiter_free_call_tokens(arg_tokens
, arg_count
, false);
375 static void psi_cpp_tokiter_expand_call_tokens(struct psi_cpp
*cpp
,
376 struct psi_cpp_macro_decl
*macro
, struct psi_plist
**arg_tokens_list
)
379 struct psi_token
*tok
;
380 struct psi_plist
*tokens
= psi_plist_init(NULL
);
382 for (i
= 0; psi_plist_get(macro
->tokens
, i
, &tok
); ++i
) {
383 struct psi_plist
*arg_tokens
= NULL
;
385 if (tok
->type
== PSI_T_NAME
) {
387 struct psi_token
*arg_name
;
389 for (s
= 0; psi_plist_get(macro
->sig
, s
, &arg_name
); ++s
) {
390 if (arg_name
->size
== tok
->size
) {
391 if (!memcmp(arg_name
->text
, tok
->text
, tok
->size
)) {
392 arg_tokens
= arg_tokens_list
[s
];
400 tokens
= psi_plist_add_r(tokens
, psi_plist_count(arg_tokens
), psi_plist_eles(arg_tokens
));
402 tokens
= psi_plist_add(tokens
, &tok
);
406 psi_cpp_tokiter_expand_tokens(cpp
, tokens
);
407 psi_plist_free(tokens
);
410 static bool psi_cpp_tokiter_expand_call(struct psi_cpp
*cpp
,
411 struct psi_cpp_macro_decl
*macro
)
413 /* function-like macro
414 * #define FOO(a,b) a>b // macro->sig == {a, b}, macro->tokens = {a, >, b}
415 * # if FOO(1,2) // expands to if 1 > 2
417 size_t start
= psi_cpp_tokiter_index(cpp
);
418 struct psi_plist
**arg_tokens_list
;
420 /* read in tokens, until we have balanced parens */
421 arg_tokens_list
= psi_cpp_tokiter_read_call_tokens(cpp
, psi_plist_count(macro
->sig
));
422 if (!arg_tokens_list
) {
423 psi_cpp_tokiter_seek(cpp
, start
);
427 /* ditch arg tokens */
428 psi_cpp_tokiter_del_range(cpp
, start
, psi_cpp_tokiter_index(cpp
) - start
+ 1, false);
429 psi_cpp_tokiter_seek(cpp
, start
);
431 /* insert and expand macro tokens */
432 psi_cpp_tokiter_expand_call_tokens(cpp
, macro
, arg_tokens_list
);
433 psi_cpp_tokiter_free_call_tokens(arg_tokens_list
, psi_plist_count(macro
->sig
), true);
435 /* back to where we took off */
436 psi_cpp_tokiter_seek(cpp
, start
);
441 bool psi_cpp_tokiter_expand(struct psi_cpp
*cpp
)
443 if (psi_cpp_tokiter_valid(cpp
)) {
444 struct psi_token
*current
= psi_cpp_tokiter_current(cpp
);
447 struct psi_cpp_macro_decl
*macro
= zend_hash_str_find_ptr(
448 &cpp
->defs
, current
->text
, current
->size
);
450 /* don't expand itself */
451 if (macro
&& macro
->token
!= current
) {
453 fprintf(stderr
, "PSI: CPP expand < ");
454 psi_token_dump(2, current
);
457 return psi_cpp_tokiter_expand_call(cpp
, macro
);
459 size_t index
= psi_cpp_tokiter_index(cpp
);
461 /* delete current token from stream */
462 psi_cpp_tokiter_del_cur(cpp
, true);
464 if (index
!= psi_cpp_tokiter_index(cpp
)) {
465 /* might have been last token */
466 psi_cpp_tokiter_next(cpp
);
468 /* replace with tokens from macro */
469 psi_cpp_tokiter_expand_tokens(cpp
, macro
->tokens
);