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
;
85 case PSI_T_INCLUDE_NEXT
:
90 psi_cpp_macro_decl_free(&exp
->data
.decl
);
94 psi_num_exp_free(&exp
->data
.num
);
98 case PSI_T_PRAGMA_ONCE
:
111 void psi_cpp_exp_dump(int fd
, struct psi_cpp_exp
*exp
)
113 dprintf(fd
, "#%s ", exp
->token
->text
);
117 if (!exp
->data
.tok
) {
124 dprintf(fd
, "%s", exp
->data
.tok
->text
);
128 case PSI_T_INCLUDE_NEXT
:
129 if (exp
->data
.tok
->type
== PSI_T_CPP_HEADER
) {
130 dprintf(fd
, "<%s>", exp
->data
.tok
->text
);
132 dprintf(fd
, "\"%s\"", exp
->data
.tok
->text
);
136 psi_cpp_macro_decl_dump(fd
, exp
->data
.decl
);
140 psi_num_exp_dump(fd
, exp
->data
.num
);
144 case PSI_T_PRAGMA_ONCE
:
154 static inline bool psi_cpp_level_skipped(struct psi_cpp
*cpp
)
156 return cpp
->skip
== cpp
->level
;
159 static inline void psi_cpp_level_skip(struct psi_cpp
*cpp
)
162 cpp
->skip
= cpp
->level
;
165 static inline void psi_cpp_level_unskip(struct psi_cpp
*cpp
)
167 if (psi_cpp_level_skipped(cpp
)) {
172 static inline bool psi_cpp_level_masked(struct psi_cpp
*cpp
)
174 return cpp
->seen
& (1 << cpp
->level
);
177 static inline void psi_cpp_level_mask(struct psi_cpp
*cpp
)
179 assert(!psi_cpp_level_masked(cpp
));
180 cpp
->seen
|= (1 << cpp
->level
);
183 static inline void psi_cpp_level_unmask(struct psi_cpp
*cpp
)
185 cpp
->seen
&= ~(1 << cpp
->level
);
188 void psi_cpp_exp_exec(struct psi_cpp_exp
*exp
, struct psi_cpp
*cpp
, struct psi_data
*D
)
190 PSI_DEBUG_PRINT(D
, "PSI: CPP EVAL < %s (level=%u, skip=%u)\n",
191 exp
->token
->text
, cpp
->level
, cpp
->skip
);
194 psi_cpp_exp_dump(2, exp
);
200 D
->error(D
, exp
->token
, PSI_ERROR
, "%s",
201 exp
->data
.tok
? exp
->data
.tok
->text
: "");
206 D
->error(D
, exp
->token
, PSI_WARNING
, "%s",
207 exp
->data
.tok
? exp
->data
.tok
->text
: "");
212 psi_cpp_undef(cpp
, exp
->data
.tok
);
217 psi_cpp_define(cpp
, exp
->data
.decl
);
219 exp
->data
.decl
= NULL
;
225 if (psi_cpp_defined(cpp
, exp
->data
.tok
)) {
226 psi_cpp_level_mask(cpp
);
228 psi_cpp_level_skip(cpp
);
235 if (psi_cpp_defined(cpp
, exp
->data
.tok
)) {
236 psi_cpp_level_skip(cpp
);
238 psi_cpp_level_mask(cpp
);
245 if (psi_cpp_if(cpp
, exp
)) {
246 psi_cpp_level_mask(cpp
);
248 psi_cpp_level_skip(cpp
);
254 D
->error(D
, exp
->token
, PSI_WARNING
, "Ingoring lone #endif");
256 psi_cpp_level_unskip(cpp
);
257 psi_cpp_level_unmask(cpp
);
262 /* FIXME: catch "else" after "else" */
264 D
->error(D
, exp
->token
, PSI_WARNING
, "Ingoring lone #else");
265 } else if (psi_cpp_level_skipped(cpp
) && !psi_cpp_level_masked(cpp
)) {
267 * if skip is set on this level and the level has
268 * not been masked yet, then unskip and mask this level
270 psi_cpp_level_unskip(cpp
);
271 psi_cpp_level_mask(cpp
);
272 } else if (!cpp
->skip
&& psi_cpp_level_masked(cpp
)) {
274 * previous block masked this level
276 psi_cpp_level_skip(cpp
);
278 assert(cpp
->skip
<= cpp
->level
);
283 D
->error(D
, exp
->token
, PSI_WARNING
, "Ingoring lone #elif");
284 } else if (psi_cpp_level_skipped(cpp
) && !psi_cpp_level_masked(cpp
)) {
286 * if skip is set on this level and the level has
287 * not been masked yet, then unskip and mask this
288 * level, if the condition evals truthy
290 if (psi_cpp_if(cpp
, exp
)) {
291 psi_cpp_level_unskip(cpp
);
292 psi_cpp_level_mask(cpp
);
294 } else if (!cpp
->skip
&& psi_cpp_level_masked(cpp
)) {
296 * previous block masked this level
298 psi_cpp_level_skip(cpp
);
300 assert(cpp
->skip
<= cpp
->level
);
305 if (!psi_cpp_include(cpp
, exp
->data
.tok
, PSI_CPP_INCLUDE
)) {
306 D
->error(D
, exp
->token
, PSI_WARNING
, "Failed to include %s", exp
->data
.tok
->text
);
310 case PSI_T_INCLUDE_NEXT
:
312 if (!psi_cpp_include(cpp
, exp
->data
.tok
, PSI_CPP_INCLUDE_NEXT
)) {
313 D
->error(D
, exp
->token
, PSI_WARNING
, "Failed to include %s", exp
->data
.tok
->text
);
319 if (!psi_cpp_include(cpp
, exp
->data
.tok
, PSI_CPP_INCLUDE_ONCE
)) {
320 D
->error(D
, exp
->token
, PSI_WARNING
, "Failed to include %s", exp
->data
.tok
->text
);
324 case PSI_T_PRAGMA_ONCE
:
326 zend_hash_str_add_empty_element(&cpp
->once
, exp
->token
->file
, strlen(exp
->token
->file
));
334 PSI_DEBUG_PRINT(D
, "PSI: CPP EVAL > %s (level=%u, skip=%u)\n",
335 exp
->token
->text
, cpp
->level
, cpp
->skip
);