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"
33 struct psi_cpp_exp
*psi_cpp_exp_init(token_t type
, void *data
)
35 struct psi_cpp_exp
*exp
= calloc(1, sizeof(*exp
));
37 switch ((exp
->type
= type
)) {
45 case PSI_T_INCLUDE_NEXT
:
49 exp
->data
.decl
= data
;
57 case PSI_T_PRAGMA_ONCE
:
67 void psi_cpp_exp_free(struct psi_cpp_exp
**exp_ptr
)
70 struct psi_cpp_exp
*exp
= *exp_ptr
;
81 case PSI_T_INCLUDE_NEXT
:
82 psi_token_free(&exp
->data
.tok
);
85 psi_cpp_macro_decl_free(&exp
->data
.decl
);
89 psi_num_exp_free(&exp
->data
.num
);
93 case PSI_T_PRAGMA_ONCE
:
99 psi_token_free(&exp
->token
);
104 void psi_cpp_exp_dump(int fd
, struct psi_cpp_exp
*exp
)
106 dprintf(fd
, "#%s ", exp
->token
->text
->val
);
110 if (!exp
->data
.tok
) {
117 dprintf(fd
, "%s", exp
->data
.tok
->text
->val
);
121 case PSI_T_INCLUDE_NEXT
:
122 if (exp
->data
.tok
->type
== PSI_T_CPP_HEADER
) {
123 dprintf(fd
, "<%s>", exp
->data
.tok
->text
->val
);
125 dprintf(fd
, "\"%s\"", exp
->data
.tok
->text
->val
);
129 psi_cpp_macro_decl_dump(fd
, exp
->data
.decl
);
133 psi_num_exp_dump(fd
, exp
->data
.num
);
137 case PSI_T_PRAGMA_ONCE
:
147 static inline bool psi_cpp_level_skipped(struct psi_cpp
*cpp
)
149 return cpp
->skip
== cpp
->level
;
152 static inline void psi_cpp_level_skip(struct psi_cpp
*cpp
)
155 cpp
->skip
= cpp
->level
;
158 static inline void psi_cpp_level_unskip(struct psi_cpp
*cpp
)
160 if (psi_cpp_level_skipped(cpp
)) {
165 static inline bool psi_cpp_level_masked(struct psi_cpp
*cpp
)
167 return cpp
->seen
& (1 << cpp
->level
);
170 static inline void psi_cpp_level_mask(struct psi_cpp
*cpp
)
172 assert(!psi_cpp_level_masked(cpp
));
173 cpp
->seen
|= (1 << cpp
->level
);
176 static inline void psi_cpp_level_unmask(struct psi_cpp
*cpp
)
178 cpp
->seen
&= ~(1 << cpp
->level
);
181 void psi_cpp_exp_exec(struct psi_cpp_exp
*exp
, struct psi_cpp
*cpp
, struct psi_data
*D
)
183 PSI_DEBUG_PRINT(D
, "PSI: CPP EVAL < %s (level=%u, skip=%u)\n",
184 exp
->token
->text
->val
, cpp
->level
, cpp
->skip
);
187 psi_cpp_exp_dump(2, exp
);
193 D
->error(D
, exp
->token
, PSI_ERROR
, "%s",
194 exp
->data
.tok
? exp
->data
.tok
->text
->val
: "");
199 D
->error(D
, exp
->token
, PSI_WARNING
, "%s",
200 exp
->data
.tok
? exp
->data
.tok
->text
->val
: "");
205 psi_cpp_undef(cpp
, exp
->data
.tok
);
210 psi_cpp_define(cpp
, exp
->data
.decl
);
212 exp
->data
.decl
= NULL
;
218 if (psi_cpp_defined(cpp
, exp
->data
.tok
)) {
219 psi_cpp_level_mask(cpp
);
221 psi_cpp_level_skip(cpp
);
228 if (psi_cpp_defined(cpp
, exp
->data
.tok
)) {
229 psi_cpp_level_skip(cpp
);
231 psi_cpp_level_mask(cpp
);
238 if (psi_cpp_if(cpp
, exp
)) {
239 psi_cpp_level_mask(cpp
);
241 psi_cpp_level_skip(cpp
);
247 D
->error(D
, exp
->token
, PSI_WARNING
, "Ingoring lone #endif");
249 psi_cpp_level_unskip(cpp
);
250 psi_cpp_level_unmask(cpp
);
255 /* FIXME: catch "else" after "else" */
257 D
->error(D
, exp
->token
, PSI_WARNING
, "Ingoring lone #else");
258 } else if (psi_cpp_level_skipped(cpp
) && !psi_cpp_level_masked(cpp
)) {
260 * if skip is set on this level and the level has
261 * not been masked yet, then unskip and mask this level
263 psi_cpp_level_unskip(cpp
);
264 psi_cpp_level_mask(cpp
);
265 } else if (!cpp
->skip
&& psi_cpp_level_masked(cpp
)) {
267 * previous block masked this level
269 psi_cpp_level_skip(cpp
);
271 assert(cpp
->skip
<= cpp
->level
);
276 D
->error(D
, exp
->token
, PSI_WARNING
, "Ingoring lone #elif");
277 } else if (psi_cpp_level_skipped(cpp
) && !psi_cpp_level_masked(cpp
)) {
279 * if skip is set on this level and the level has
280 * not been masked yet, then unskip and mask this
281 * level, if the condition evals truthy
283 if (psi_cpp_if(cpp
, exp
)) {
284 psi_cpp_level_unskip(cpp
);
285 psi_cpp_level_mask(cpp
);
287 } else if (!cpp
->skip
&& psi_cpp_level_masked(cpp
)) {
289 * previous block masked this level
291 psi_cpp_level_skip(cpp
);
293 assert(cpp
->skip
<= cpp
->level
);
298 if (!psi_cpp_include(cpp
, exp
->data
.tok
, PSI_CPP_INCLUDE
)) {
299 D
->error(D
, exp
->token
, PSI_WARNING
, "Failed to include %s", exp
->data
.tok
->text
->val
);
303 case PSI_T_INCLUDE_NEXT
:
305 if (!psi_cpp_include(cpp
, exp
->data
.tok
, PSI_CPP_INCLUDE_NEXT
)) {
306 D
->error(D
, exp
->token
, PSI_WARNING
, "Failed to include %s", exp
->data
.tok
->text
->val
);
312 if (!psi_cpp_include(cpp
, exp
->data
.tok
, PSI_CPP_INCLUDE_ONCE
)) {
313 D
->error(D
, exp
->token
, PSI_WARNING
, "Failed to include %s", exp
->data
.tok
->text
->val
);
317 case PSI_T_PRAGMA_ONCE
:
319 zend_hash_add_empty_element(&cpp
->once
, exp
->token
->file
);
327 PSI_DEBUG_PRINT(D
, "PSI: CPP EVAL > %s (level=%u, skip=%u)\n",
328 exp
->token
->text
->val
, cpp
->level
, cpp
->skip
);