| blob | 3e84a2e405a7389af6479a06413790eae4627a5a |
1 /* -*-C-*-
2 * Wrc preprocessor lexical analysis
3 *
4 * Copyright 1999-2000 Bertho A. Stultiens (BS)
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 *
20 * History:
21 * 24-Apr-2000 BS - Started from scratch to restructure everything
22 * and reintegrate the source into the wine-tree.
23 * 04-Jan-2000 BS - Added comments about the lexicographical
24 * grammar to give some insight in the complexity.
25 * 28-Dec-1999 BS - Eliminated backing-up of the flexer by running
26 * `flex -b' on the source. This results in some
27 * weirdo extra rules, but a much faster scanner.
28 * 23-Dec-1999 BS - Started this file
29 *
30 *-------------------------------------------------------------------------
31 * The preprocessor's lexographical grammar (approximately):
32 *
33 * pp := {ws} # {ws} if {ws} {expr} {ws} \n
34 * | {ws} # {ws} ifdef {ws} {id} {ws} \n
35 * | {ws} # {ws} ifndef {ws} {id} {ws} \n
36 * | {ws} # {ws} elif {ws} {expr} {ws} \n
37 * | {ws} # {ws} else {ws} \n
38 * | {ws} # {ws} endif {ws} \n
39 * | {ws} # {ws} include {ws} < {anytext} > \n
40 * | {ws} # {ws} include {ws} " {anytext} " \n
41 * | {ws} # {ws} define {ws} {anytext} \n
42 * | {ws} # {ws} define( {arglist} ) {ws} {expansion} \n
43 * | {ws} # {ws} pragma {ws} {anytext} \n
44 * | {ws} # {ws} ident {ws} {anytext} \n
45 * | {ws} # {ws} error {ws} {anytext} \n
46 * | {ws} # {ws} warning {ws} {anytext} \n
47 * | {ws} # {ws} line {ws} " {anytext} " {number} \n
48 * | {ws} # {ws} {number} " {anytext} " {number} [ {number} [{number}] ] \n
49 * | {ws} # {ws} \n
50 *
51 * ws := [ \t\r\f\v]*
52 *
53 * expr := {expr} [+-*%^/|&] {expr}
54 * | {expr} {logor|logand} {expr}
55 * | [!~+-] {expr}
56 * | {expr} ? {expr} : {expr}
57 *
58 * logor := ||
59 *
60 * logand := &&
61 *
62 * id := [a-zA-Z_][a-zA-Z0-9_]*
63 *
64 * anytext := [^\n]* (see note)
65 *
66 * arglist :=
67 * | {id}
68 * | {arglist} , {id}
69 * | {arglist} , {id} ...
70 *
71 * expansion := {id}
72 * | # {id}
73 * | {anytext}
74 * | {anytext} ## {anytext}
75 *
76 * number := [0-9]+
77 *
78 * Note: "anytext" is not always "[^\n]*". This is because the
79 * trailing context must be considered as well.
80 *
81 * The only certain assumption for the preprocessor to make is that
82 * directives start at the beginning of the line, followed by a '#'
83 * and end with a newline.
84 * Any directive may be suffixed with a line-continuation. Also
85 * classical comment / *...* / (note: no comments within comments,
86 * therefore spaces) is considered to be a line-continuation
87 * (according to gcc and egcs AFAIK, ANSI is a bit vague).
88 * Comments have not been added to the above grammar for simplicity
89 * reasons. However, it is allowed to enter comment anywhere within
90 * the directives as long as they do not interfere with the context.
91 * All comments are considered to be deletable whitespace (both
92 * classical form "/ *...* /" and C++ form "//...\n").
93 *
94 * All recursive scans, except for macro-expansion, are done by the
95 * parser, whereas the simple state transitions of non-recursive
96 * directives are done in the scanner. This results in the many
97 * exclusive start-conditions of the scanner.
98 *
99 * Macro expansions are slightly more difficult because they have to
100 * prescan the arguments. Parameter substitution is literal if the
101 * substitution is # or ## (either side). This enables new identifiers
102 * to be created (see 'info cpp' node Macro|Pitfalls|Prescan for more
103 * information).
104 *
105 * FIXME: Variable macro parameters is recognized, but not yet
106 * expanded. I have to reread the ANSI standard on the subject (yes,
107 * ANSI defines it).
108 *
109 * The following special defines are supported:
110 * __FILE__ -> "thissource.c"
111 * __LINE__ -> 123
112 * __DATE__ -> "May 1 2000"
113 * __TIME__ -> "23:59:59"
114 * These macros expand, as expected, into their ANSI defined values.
115 *
116 * The same include prevention is implemented as gcc and egcs does.
117 * This results in faster processing because we do not read the text
118 * at all. Some wine-sources attempt to include the same file 4 or 5
119 * times. This strategy also saves a lot blank output-lines, which in
120 * its turn improves the real resource scanner/parser.
121 *
122 */
124 /*
125 * Special flex options and exclusive scanner start-conditions
126 */
127 %option stack
128 %option 8bit never-interactive
129 %option noinput nounput
130 %option prefix="ppy_"
132 %x pp_pp
133 %x pp_eol
134 %x pp_inc
135 %x pp_dqs
136 %x pp_sqs
137 %x pp_iqs
138 %x pp_comment
139 %x pp_def
140 %x pp_define
141 %x pp_macro
142 %x pp_mbody
143 %x pp_macign
144 %x pp_macscan
145 %x pp_macexp
146 %x pp_if
147 %x pp_ifd
148 %x pp_endif
149 %x pp_line
150 %x pp_defined
151 %x pp_ignore
152 %x RCINCL
154 ws [ \v\f\t\r]
155 cident [a-zA-Z_][0-9a-zA-Z_]*
156 ul [uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
158 %{
159 #include "config.h"
160 #include "wine/port.h"
161 #include <stdio.h>
162 #include <stdlib.h>
163 #include <string.h>
164 #include <ctype.h>
165 #include <assert.h>
167 #ifndef HAVE_UNISTD_H
168 #define YY_NO_UNISTD_H
169 #endif
171 #include "wpp_private.h"
172 #include "ppy.tab.h"
174 /*
175 * Make sure that we are running an appropriate version of flex.
176 */
177 #if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
178 #error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
179 #endif
181 #define YY_READ_BUF_SIZE 65536 /* So we read most of a file at once */
183 #define yy_current_state() YY_START
184 #define yy_pp_state(x) yy_pop_state(); yy_push_state(x)
186 /*
187 * Always update the current character position within a line
188 */
189 #define YY_USER_ACTION pp_status.char_number+=ppy_leng;
191 /*
192 * Buffer management for includes and expansions
193 */
194 #define MAXBUFFERSTACK 128 /* Nesting more than 128 includes or macro expansion textss is insane */
196 typedef struct bufferstackentry {
197 YY_BUFFER_STATE bufferstate; /* Buffer to switch back to */
198 pp_entry_t *define; /* Points to expanding define or NULL if handling includes */
199 int line_number; /* Line that we were handling */
200 int char_number; /* The current position on that line */
201 const char *filename; /* Filename that we were handling */
202 int if_depth; /* How many #if:s deep to check matching #endif:s */
203 int ncontinuations; /* Remember the continuation state */
204 int should_pop; /* Set if we must pop the start-state on EOF */
205 /* Include management */
206 include_state_t incl;
207 char *include_filename;
208 } bufferstackentry_t;
210 #define ALLOCBLOCKSIZE (1 << 10) /* Allocate these chunks at a time for string-buffers */
212 /*
213 * Macro expansion nesting
214 * We need the stack to handle expansions while scanning
215 * a macro's arguments. The TOS must always be the macro
216 * that receives the current expansion from the scanner.
217 */
218 #define MAXMACEXPSTACK 128 /* Nesting more than 128 macro expansions is insane */
220 typedef struct macexpstackentry {
221 pp_entry_t *ppp; /* This macro we are scanning */
222 char **args; /* With these arguments */
223 char **ppargs; /* Resulting in these preprocessed arguments */
224 int *nnls; /* Number of newlines per argument */
225 int nargs; /* And this many arguments scanned */
226 int parentheses; /* Nesting level of () */
227 int curargsize; /* Current scanning argument's size */
228 int curargalloc; /* Current scanning argument's block allocated */
229 char *curarg; /* Current scanning argument's content */
230 } macexpstackentry_t;
232 #define MACROPARENTHESES() (top_macro()->parentheses)
234 /*
235 * Prototypes
236 */
237 static void newline(int);
238 static int make_number(int radix, YYSTYPE *val, const char *str, int len);
239 static void put_buffer(const char *s, int len);
240 /* Buffer management */
241 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
242 static bufferstackentry_t *pop_buffer(void);
243 /* String functions */
244 static void new_string(void);
245 static void add_string(const char *str, int len);
246 static char *get_string(void);
247 static void put_string(void);
248 static int string_start(void);
249 /* Macro functions */
250 static void push_macro(pp_entry_t *ppp);
251 static macexpstackentry_t *top_macro(void);
252 static macexpstackentry_t *pop_macro(void);
253 static void free_macro(macexpstackentry_t *mep);
254 static void add_text_to_macro(const char *text, int len);
255 static void macro_add_arg(int last);
256 static void macro_add_expansion(void);
257 /* Expansion */
258 static void expand_special(pp_entry_t *ppp);
259 static void expand_define(pp_entry_t *ppp);
260 static void expand_macro(macexpstackentry_t *mep);
262 /*
263 * Local variables
264 */
265 static int ncontinuations;
267 static int strbuf_idx = 0;
268 static int strbuf_alloc = 0;
269 static char *strbuffer = NULL;
270 static int str_startline;
272 static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
273 static int macexpstackidx = 0;
275 static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
276 static int bufferstackidx = 0;
278 /*
279 * Global variables
280 */
281 include_state_t pp_incl_state =
282 {
283 -1, /* state */
284 NULL, /* ppp */
285 0, /* ifdepth */
286 0 /* seen_junk */
287 };
289 includelogicentry_t *pp_includelogiclist = NULL;
291 %}
293 /*
294 **************************************************************************
295 * The scanner starts here
296 **************************************************************************
297 */
299 %%
300 /*
301 * Catch line-continuations.
302 * Note: Gcc keeps the line-continuations in, for example, strings
303 * intact. However, I prefer to remove them all so that the next
304 * scanner will not need to reduce the continuation state.
305 *
306 * <*>\\\n newline(0);
307 */
309 /*
310 * Detect the leading # of a preprocessor directive.
311 */
312 <INITIAL,pp_ignore>^{ws}*# pp_incl_state.seen_junk++; yy_push_state(pp_pp);
314 /*
315 * Scan for the preprocessor directives
316 */
317 <pp_pp>{ws}*include{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
318 <pp_pp>{ws}*define{ws}* yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
319 <pp_pp>{ws}*error{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tERROR;
320 <pp_pp>{ws}*warning{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tWARNING;
321 <pp_pp>{ws}*pragma{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPRAGMA;
322 <pp_pp>{ws}*ident{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPPIDENT;
323 <pp_pp>{ws}*undef{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
324 <pp_pp>{ws}*ifdef{ws}* yy_pp_state(pp_ifd); return tIFDEF;
325 <pp_pp>{ws}*ifndef{ws}* pp_incl_state.seen_junk--; yy_pp_state(pp_ifd); return tIFNDEF;
326 <pp_pp>{ws}*if{ws}* yy_pp_state(pp_if); return tIF;
327 <pp_pp>{ws}*elif{ws}* yy_pp_state(pp_if); return tELIF;
328 <pp_pp>{ws}*else{ws}* yy_pp_state(pp_endif); return tELSE;
329 <pp_pp>{ws}*endif{ws}* yy_pp_state(pp_endif); return tENDIF;
330 <pp_pp>{ws}*line{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
331 <pp_pp>{ws}+ if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
332 <pp_pp>{ws}*[a-z]+ ppy_error("Invalid preprocessor token '%s'", ppy_text);
333 <pp_pp>\r?\n newline(1); yy_pop_state(); return tNL; /* This could be the null-token */
334 <pp_pp>\\\r?\n newline(0);
335 <pp_pp>\\\r? ppy_error("Preprocessor junk '%s'", ppy_text);
336 <pp_pp>. return *ppy_text;
338 /*
339 * Handle #include and #line
340 */
341 <pp_line>[0-9]+ return make_number(10, &ppy_lval, ppy_text, ppy_leng);
342 <pp_inc>\< new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
343 <pp_inc,pp_line>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
344 <pp_inc,pp_line>{ws}+ ;
345 <pp_inc,pp_line>\n newline(1); yy_pop_state(); return tNL;
346 <pp_inc,pp_line>\\\r?\n newline(0);
347 <pp_inc,pp_line>(\\\r?)|(.) ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
349 /*
350 * Ignore all input when a false clause is parsed
351 */
352 <pp_ignore>[^#/\\\n]+ ;
353 <pp_ignore>\n newline(1);
354 <pp_ignore>\\\r?\n newline(0);
355 <pp_ignore>(\\\r?)|(.) ;
357 /*
358 * Handle #if and #elif.
359 * These require conditionals to be evaluated, but we do not
360 * want to jam the scanner normally when we see these tokens.
361 * Note: tIDENT is handled below.
362 */
364 <pp_if>0[0-7]*{ul}? return make_number(8, &ppy_lval, ppy_text, ppy_leng);
365 <pp_if>0[0-7]*[8-9]+{ul}? ppy_error("Invalid octal digit");
366 <pp_if>[1-9][0-9]*{ul}? return make_number(10, &ppy_lval, ppy_text, ppy_leng);
367 <pp_if>0[xX][0-9a-fA-F]+{ul}? return make_number(16, &ppy_lval, ppy_text, ppy_leng);
368 <pp_if>0[xX] ppy_error("Invalid hex number");
369 <pp_if>defined yy_push_state(pp_defined); return tDEFINED;
370 <pp_if>"<<" return tLSHIFT;
371 <pp_if>">>" return tRSHIFT;
372 <pp_if>"&&" return tLOGAND;
373 <pp_if>"||" return tLOGOR;
374 <pp_if>"==" return tEQ;
375 <pp_if>"!=" return tNE;
376 <pp_if>"<=" return tLTE;
377 <pp_if>">=" return tGTE;
378 <pp_if>\n newline(1); yy_pop_state(); return tNL;
379 <pp_if>\\\r?\n newline(0);
380 <pp_if>\\\r? ppy_error("Junk in conditional expression");
381 <pp_if>{ws}+ ;
382 <pp_if>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
383 <pp_if>\" ppy_error("String constants not allowed in conditionals");
384 <pp_if>. return *ppy_text;
386 /*
387 * Handle #ifdef, #ifndef and #undef
388 * to get only an untranslated/unexpanded identifier
389 */
390 <pp_ifd>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
391 <pp_ifd>{ws}+ ;
392 <pp_ifd>\n newline(1); yy_pop_state(); return tNL;
393 <pp_ifd>\\\r?\n newline(0);
394 <pp_ifd>(\\\r?)|(.) ppy_error("Identifier expected");
396 /*
397 * Handle #else and #endif.
398 */
399 <pp_endif>{ws}+ ;
400 <pp_endif>\n newline(1); yy_pop_state(); return tNL;
401 <pp_endif>\\\r?\n newline(0);
402 <pp_endif>. ppy_error("Garbage after #else or #endif.");
404 /*
405 * Handle the special 'defined' keyword.
406 * This is necessary to get the identifier prior to any
407 * substitutions.
408 */
409 <pp_defined>{cident} yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
410 <pp_defined>{ws}+ ;
411 <pp_defined>(\()|(\)) return *ppy_text;
412 <pp_defined>\\\r?\n newline(0);
413 <pp_defined>(\\.)|(\n)|(.) ppy_error("Identifier expected");
415 /*
416 * Handle #error, #warning, #pragma and #ident.
417 * Pass everything literally to the parser, which
418 * will act appropriately.
419 * Comments are stripped from the literal text.
420 */
421 <pp_eol>[^/\\\n]+ if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
422 <pp_eol>\/[^/\\\n*]* if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
423 <pp_eol>(\\\r?)|(\/[^/*]) if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
424 <pp_eol>\n newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
425 <pp_eol>\\\r?\n newline(0);
427 /*
428 * Handle left side of #define
429 */
430 <pp_def>{cident}\( ppy_lval.cptr = pp_xstrdup(ppy_text); ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro); return tMACRO;
431 <pp_def>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
432 <pp_def>{ws}+ ;
433 <pp_def>\\\r?\n newline(0);
434 <pp_def>(\\\r?)|(\n)|(.) perror("Identifier expected");
436 /*
437 * Scan the substitution of a define
438 */
439 <pp_define>[^'"/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
440 <pp_define>(\\\r?)|(\/[^/*]) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
441 <pp_define>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
442 <pp_define>\\\r?\n newline(0);
443 <pp_define>\n newline(1); yy_pop_state(); return tNL;
444 <pp_define>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
445 <pp_define>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
447 /*
448 * Scan the definition macro arguments
449 */
450 <pp_macro>\){ws}* yy_pp_state(pp_mbody); return tMACROEND;
451 <pp_macro>{ws}+ ;
452 <pp_macro>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
453 <pp_macro>, return ',';
454 <pp_macro>"..." return tELIPSIS;
455 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?) ppy_error("Argument identifier expected");
456 <pp_macro>\\\r?\n newline(0);
458 /*
459 * Scan the substitution of a macro
460 */
461 <pp_mbody>[^a-zA-Z0-9'"#/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
462 <pp_mbody>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
463 <pp_mbody>\#\# return tCONCAT;
464 <pp_mbody>\# return tSTRINGIZE;
465 <pp_mbody>[0-9][^'"#/\\\n]* ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
466 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
467 <pp_mbody>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
468 <pp_mbody>\\\r?\n newline(0);
469 <pp_mbody>\n newline(1); yy_pop_state(); return tNL;
470 <pp_mbody>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
471 <pp_mbody>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
473 /*
474 * Macro expansion text scanning.
475 * This state is active just after the identifier is scanned
476 * that triggers an expansion. We *must* delete the leading
477 * whitespace before we can start scanning for arguments.
478 *
479 * If we do not see a '(' as next trailing token, then we have
480 * a false alarm. We just continue with a nose-bleed...
481 */
482 <pp_macign>{ws}*/\( yy_pp_state(pp_macscan);
483 <pp_macign>{ws}*\n {
484 if(yy_top_state() != pp_macscan)
485 newline(0);
486 }
487 <pp_macign>{ws}*\\\r?\n newline(0);
488 <pp_macign>{ws}+|{ws}*\\\r?|. {
489 macexpstackentry_t *mac = pop_macro();
490 yy_pop_state();
491 put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
492 put_buffer(ppy_text, ppy_leng);
493 free_macro(mac);
494 }
496 /*
497 * Macro expansion argument text scanning.
498 * This state is active when a macro's arguments are being read for expansion.
499 */
500 <pp_macscan>\( {
501 if(++MACROPARENTHESES() > 1)
502 add_text_to_macro(ppy_text, ppy_leng);
503 }
504 <pp_macscan>\) {
505 if(--MACROPARENTHESES() == 0)
506 {
507 yy_pop_state();
508 macro_add_arg(1);
509 }
510 else
511 add_text_to_macro(ppy_text, ppy_leng);
512 }
513 <pp_macscan>, {
514 if(MACROPARENTHESES() > 1)
515 add_text_to_macro(ppy_text, ppy_leng);
516 else
517 macro_add_arg(0);
518 }
519 <pp_macscan>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
520 <pp_macscan>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
521 <pp_macscan>"/*" yy_push_state(pp_comment); add_text_to_macro(" ", 1);
522 <pp_macscan>\n pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
523 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.) add_text_to_macro(ppy_text, ppy_leng);
524 <pp_macscan>\\\r?\n newline(0);
526 /*
527 * Comment handling (almost all start-conditions)
528 */
529 <INITIAL,pp_pp,pp_ignore,pp_eol,pp_inc,pp_if,pp_ifd,pp_endif,pp_defined,pp_def,pp_define,pp_macro,pp_mbody,RCINCL>"/*" yy_push_state(pp_comment);
530 <pp_comment>[^*\n]*|"*"+[^*/\n]* ;
531 <pp_comment>\n newline(0);
532 <pp_comment>"*"+"/" yy_pop_state();
534 /*
535 * Remove C++ style comment (almost all start-conditions)
536 */
537 <INITIAL,pp_pp,pp_ignore,pp_eol,pp_inc,pp_if,pp_ifd,pp_endif,pp_defined,pp_def,pp_define,pp_macro,pp_mbody,pp_macscan,RCINCL>"//"[^\n]* {
538 if(ppy_text[ppy_leng-1] == '\\')
539 ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
540 }
542 /*
543 * Single, double and <> quoted constants
544 */
545 <INITIAL,pp_macexp>\" pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
546 <INITIAL,pp_macexp>\' pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
547 <pp_dqs>[^"\\\n]+ add_string(ppy_text, ppy_leng);
548 <pp_dqs>\" {
549 add_string(ppy_text, ppy_leng);
550 yy_pop_state();
551 switch(yy_current_state())
552 {
553 case pp_pp:
554 case pp_define:
555 case pp_mbody:
556 case pp_inc:
557 case RCINCL:
558 if (yy_current_state()==RCINCL) yy_pop_state();
559 ppy_lval.cptr = get_string();
560 return tDQSTRING;
561 case pp_line:
562 ppy_lval.cptr = get_string();
563 return tDQSTRING;
564 default:
565 put_string();
566 }
567 }
568 <pp_sqs>[^'\\\n]+ add_string(ppy_text, ppy_leng);
569 <pp_sqs>\' {
570 add_string(ppy_text, ppy_leng);
571 yy_pop_state();
572 switch(yy_current_state())
573 {
574 case pp_if:
575 case pp_define:
576 case pp_mbody:
577 ppy_lval.cptr = get_string();
578 return tSQSTRING;
579 default:
580 put_string();
581 }
582 }
583 <pp_iqs>[^\>\\\n]+ add_string(ppy_text, ppy_leng);
584 <pp_iqs>\> {
585 add_string(ppy_text, ppy_leng);
586 yy_pop_state();
587 ppy_lval.cptr = get_string();
588 return tIQSTRING;
589 }
590 <pp_dqs>\\\r?\n {
591 /*
592 * This is tricky; we need to remove the line-continuation
593 * from preprocessor strings, but OTOH retain them in all
594 * other strings. This is because the resource grammar is
595 * even more braindead than initially analysed and line-
596 * continuations in strings introduce, sigh, newlines in
597 * the output. There goes the concept of non-breaking, non-
598 * spacing whitespace.
599 */
600 switch(yy_top_state())
601 {
602 case pp_pp:
603 case pp_define:
604 case pp_mbody:
605 case pp_inc:
606 case pp_line:
607 newline(0);
608 break;
609 default:
610 add_string(ppy_text, ppy_leng);
611 newline(-1);
612 }
613 }
614 <pp_iqs,pp_dqs,pp_sqs>\\. add_string(ppy_text, ppy_leng);
615 <pp_iqs,pp_dqs,pp_sqs>\n {
616 newline(1);
617 add_string(ppy_text, ppy_leng);
618 ppy_warning("Newline in string constant encounterd (started line %d)", string_start());
619 }
621 /*
622 * Identifier scanning
623 */
624 <INITIAL,pp_if,pp_inc,pp_macexp>{cident} {
625 pp_entry_t *ppp;
626 pp_incl_state.seen_junk++;
627 if(!(ppp = pplookup(ppy_text)))
628 {
629 if(yy_current_state() == pp_inc)
630 ppy_error("Expected include filename");
632 if(yy_current_state() == pp_if)
633 {
634 ppy_lval.cptr = pp_xstrdup(ppy_text);
635 return tIDENT;
636 }
637 else {
638 if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
639 yy_push_state(RCINCL);
640 return tRCINCLUDE;
641 }
642 else put_buffer(ppy_text, ppy_leng);
643 }
644 }
645 else if(!ppp->expanding)
646 {
647 switch(ppp->type)
648 {
649 case def_special:
650 expand_special(ppp);
651 break;
652 case def_define:
653 expand_define(ppp);
654 break;
655 case def_macro:
656 yy_push_state(pp_macign);
657 push_macro(ppp);
658 break;
659 default:
660 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
661 }
662 }
663 else put_buffer(ppy_text, ppy_leng);
664 }
666 /*
667 * Everything else that needs to be passed and
668 * newline and continuation handling
669 */
670 <INITIAL,pp_macexp>[^a-zA-Z_#'"/\\\n \r\t\f\v]+|(\/|\\)[^a-zA-Z_/*'"\\\n \r\t\v\f]* pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
671 <INITIAL,pp_macexp>{ws}+ put_buffer(ppy_text, ppy_leng);
672 <INITIAL>\n newline(1);
673 <INITIAL>\\\r?\n newline(0);
674 <INITIAL>\\\r? pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
676 /*
677 * Special catcher for macro argmument expansion to prevent
678 * newlines to propagate to the output or admin.
679 */
680 <pp_macexp>(\n)|(.)|(\\\r?(\n|.)) put_buffer(ppy_text, ppy_leng);
682 <RCINCL>[A-Za-z0-9_\.\\/]+ {
683 ppy_lval.cptr=pp_xstrdup(ppy_text);
684 yy_pop_state();
685 return tRCINCLUDEPATH;
686 }
688 <RCINCL>{ws}+ ;
690 <RCINCL>\" {
691 new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
692 }
694 /*
695 * This is a 'catch-all' rule to discover errors in the scanner
696 * in an orderly manner.
697 */
698 <*>. pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
700 <<EOF>> {
701 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
702 bufferstackentry_t *bep = pop_buffer();
704 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
705 ppy_warning("Unmatched #if/#endif at end of file");
707 if(!bep)
708 {
709 if(YY_START != INITIAL)
710 ppy_error("Unexpected end of file during preprocessing");
711 yyterminate();
712 }
713 else if(bep->should_pop == 2)
714 {
715 macexpstackentry_t *mac;
716 mac = pop_macro();
717 expand_macro(mac);
718 }
719 ppy__delete_buffer(b);
720 }
722 %%
723 /*
724 **************************************************************************
725 * Support functions
726 **************************************************************************
727 */
729 #ifndef ppy_wrap
730 int ppy_wrap(void)
731 {
732 return 1;
733 }
734 #endif
737 /*
738 *-------------------------------------------------------------------------
739 * Output newlines or set them as continuations
740 *
741 * Input: -1 - Don't count this one, but update local position (see pp_dqs)
742 * 0 - Line-continuation seen and cache output
743 * 1 - Newline seen and flush output
744 *-------------------------------------------------------------------------
745 */
746 static void newline(int dowrite)
747 {
748 pp_status.line_number++;
749 pp_status.char_number = 1;
751 if(dowrite == -1)
752 return;
754 ncontinuations++;
755 if(dowrite)
756 {
757 for(;ncontinuations; ncontinuations--)
758 put_buffer("\n", 1);
759 }
760 }
763 /*
764 *-------------------------------------------------------------------------
765 * Make a number out of an any-base and suffixed string
766 *
767 * Possible number extensions:
768 * - "" int
769 * - "L" long int
770 * - "LL" long long int
771 * - "U" unsigned int
772 * - "UL" unsigned long int
773 * - "ULL" unsigned long long int
774 * - "LU" unsigned long int
775 * - "LLU" unsigned long long int
776 * - "LUL" invalid
777 *
778 * FIXME:
779 * The sizes of resulting 'int' and 'long' are compiler specific.
780 * I depend on sizeof(int) > 2 here (although a relatively safe
781 * assumption).
782 * Long longs are not yet implemented because this is very compiler
783 * specific and I don't want to think too much about the problems.
784 *
785 *-------------------------------------------------------------------------
786 */
787 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
788 {
789 int is_l = 0;
790 int is_ll = 0;
791 int is_u = 0;
792 char ext[4];
794 ext[3] = '\0';
795 ext[2] = toupper(str[len-1]);
796 ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
797 ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
799 if(!strcmp(ext, "LUL"))
800 ppy_error("Invalid constant suffix");
801 else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
802 {
803 is_ll++;
804 is_u++;
805 }
806 else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
807 {
808 is_l++;
809 is_u++;
810 }
811 else if(!strcmp(ext+1, "LL"))
812 {
813 is_ll++;
814 }
815 else if(!strcmp(ext+2, "L"))
816 {
817 is_l++;
818 }
819 else if(!strcmp(ext+2, "U"))
820 {
821 is_u++;
822 }
824 if(is_ll)
825 {
826 /* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
827 #ifdef HAVE_LONG_LONG
828 if (is_u)
829 {
830 val->ull = strtoull(str, NULL, radix);
831 return tULONGLONG;
832 }
833 else
834 {
835 val->sll = strtoll(str, NULL, radix);
836 return tSLONGLONG;
837 }
838 #else
839 pp_internal_error(__FILE__, __LINE__, "long long constants not supported on this platform");
840 #endif
841 }
842 else if(is_u && is_l)
843 {
844 val->ulong = strtoul(str, NULL, radix);
845 return tULONG;
846 }
847 else if(!is_u && is_l)
848 {
849 val->slong = strtol(str, NULL, radix);
850 return tSLONG;
851 }
852 else if(is_u && !is_l)
853 {
854 val->uint = (unsigned int)strtoul(str, NULL, radix);
855 return tUINT;
856 }
858 /* Else it must be an int... */
859 val->sint = (int)strtol(str, NULL, radix);
860 return tSINT;
861 }
864 /*
865 *-------------------------------------------------------------------------
866 * Macro and define expansion support
867 *
868 * FIXME: Variable macro arguments.
869 *-------------------------------------------------------------------------
870 */
871 static void expand_special(pp_entry_t *ppp)
872 {
873 const char *dbgtext = "?";
874 static char *buf = NULL;
876 assert(ppp->type == def_special);
878 if(!strcmp(ppp->ident, "__LINE__"))
879 {
880 dbgtext = "def_special(__LINE__)";
881 buf = pp_xrealloc(buf, 32);
882 sprintf(buf, "%d", pp_status.line_number);
883 }
884 else if(!strcmp(ppp->ident, "__FILE__"))
885 {
886 dbgtext = "def_special(__FILE__)";
887 buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
888 sprintf(buf, "\"%s\"", pp_status.input);
889 }
890 else
891 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
893 if(pp_flex_debug)
894 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
895 macexpstackidx,
896 pp_status.input,
897 pp_status.line_number,
898 ppp->ident,
899 buf ? buf : "");
901 if(buf && buf[0])
902 {
903 push_buffer(ppp, NULL, NULL, 0);
904 yy_scan_string(buf);
905 }
906 }
908 static void expand_define(pp_entry_t *ppp)
909 {
910 assert(ppp->type == def_define);
912 if(pp_flex_debug)
913 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
914 macexpstackidx,
915 pp_status.input,
916 pp_status.line_number,
917 ppp->ident,
918 ppp->subst.text);
919 if(ppp->subst.text && ppp->subst.text[0])
920 {
921 push_buffer(ppp, NULL, NULL, 0);
922 yy_scan_string(ppp->subst.text);
923 }
924 }
926 static int curdef_idx = 0;
927 static int curdef_alloc = 0;
928 static char *curdef_text = NULL;
930 static void add_text(const char *str, int len)
931 {
932 if(len == 0)
933 return;
934 if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
935 {
936 curdef_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
937 curdef_text = pp_xrealloc(curdef_text, curdef_alloc * sizeof(curdef_text[0]));
938 if(curdef_alloc > 65536)
939 ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
940 }
941 memcpy(&curdef_text[curdef_idx], str, len);
942 curdef_idx += len;
943 }
945 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
946 {
947 char *cptr;
948 char *exp;
949 int tag;
950 int n;
952 if(mtp == NULL)
953 return NULL;
955 switch(mtp->type)
956 {
957 case exp_text:
958 if(pp_flex_debug)
959 fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
960 add_text(mtp->subst.text, strlen(mtp->subst.text));
961 break;
963 case exp_stringize:
964 if(pp_flex_debug)
965 fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
966 mtp->subst.argidx,
967 mep->args[mtp->subst.argidx]);
968 cptr = mep->args[mtp->subst.argidx];
969 add_text("\"", 1);
970 while(*cptr)
971 {
972 if(*cptr == '"' || *cptr == '\\')
973 add_text("\\", 1);
974 add_text(cptr, 1);
975 cptr++;
976 }
977 add_text("\"", 1);
978 break;
980 case exp_concat:
981 if(pp_flex_debug)
982 fprintf(stderr, "add_expand_text: exp_concat\n");
983 /* Remove trailing whitespace from current expansion text */
984 while(curdef_idx)
985 {
986 if(isspace(curdef_text[curdef_idx-1] & 0xff))
987 curdef_idx--;
988 else
989 break;
990 }
991 /* tag current position and recursively expand the next part */
992 tag = curdef_idx;
993 mtp = add_expand_text(mtp->next, mep, nnl);
995 /* Now get rid of the leading space of the expansion */
996 cptr = &curdef_text[tag];
997 n = curdef_idx - tag;
998 while(n)
999 {
1000 if(isspace(*cptr & 0xff))
1001 {
1002 cptr++;
1003 n--;
1004 }
1005 else
1006 break;
1007 }
1008 if(cptr != &curdef_text[tag])
1009 {
1010 memmove(&curdef_text[tag], cptr, n);
1011 curdef_idx -= (curdef_idx - tag) - n;
1012 }
1013 break;
1015 case exp_subst:
1016 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1017 exp = mep->args[mtp->subst.argidx];
1018 else
1019 exp = mep->ppargs[mtp->subst.argidx];
1020 if(exp)
1021 {
1022 add_text(exp, strlen(exp));
1023 *nnl -= mep->nnls[mtp->subst.argidx];
1024 cptr = strchr(exp, '\n');
1025 while(cptr)
1026 {
1027 *cptr = ' ';
1028 cptr = strchr(cptr+1, '\n');
1029 }
1030 mep->nnls[mtp->subst.argidx] = 0;
1031 }
1032 if(pp_flex_debug)
1033 fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1034 break;
1036 default:
1037 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1038 }
1039 return mtp;
1040 }
1042 static void expand_macro(macexpstackentry_t *mep)
1043 {
1044 mtext_t *mtp;
1045 int n, k;
1046 char *cptr;
1047 int nnl = 0;
1048 pp_entry_t *ppp = mep->ppp;
1049 int nargs = mep->nargs;
1051 assert(ppp->type == def_macro);
1052 assert(ppp->expanding == 0);
1054 if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1055 ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1057 for(n = 0; n < nargs; n++)
1058 nnl += mep->nnls[n];
1060 if(pp_flex_debug)
1061 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1062 macexpstackidx,
1063 pp_status.input,
1064 pp_status.line_number,
1065 ppp->ident,
1066 mep->nargs,
1067 nnl);
1069 curdef_idx = 0;
1071 for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1072 {
1073 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1074 break;
1075 }
1077 for(n = 0; n < nnl; n++)
1078 add_text("\n", 1);
1080 /* To make sure there is room and termination (see below) */
1081 add_text(" \0", 2);
1083 /* Strip trailing whitespace from expansion */
1084 for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1085 {
1086 if(!isspace(*cptr & 0xff))
1087 break;
1088 }
1090 /*
1091 * We must add *one* whitespace to make sure that there
1092 * is a token-separation after the expansion.
1093 */
1094 *(++cptr) = ' ';
1095 *(++cptr) = '\0';
1096 k++;
1098 /* Strip leading whitespace from expansion */
1099 for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1100 {
1101 if(!isspace(*cptr & 0xff))
1102 break;
1103 }
1105 if(k - n > 0)
1106 {
1107 if(pp_flex_debug)
1108 fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1109 push_buffer(ppp, NULL, NULL, 0);
1110 /*yy_scan_bytes(curdef_text + n, k - n);*/
1111 yy_scan_string(curdef_text + n);
1112 }
1113 }
1115 /*
1116 *-------------------------------------------------------------------------
1117 * String collection routines
1118 *-------------------------------------------------------------------------
1119 */
1120 static void new_string(void)
1121 {
1122 #ifdef DEBUG
1123 if(strbuf_idx)
1124 ppy_warning("new_string: strbuf_idx != 0");
1125 #endif
1126 strbuf_idx = 0;
1127 str_startline = pp_status.line_number;
1128 }
1130 static void add_string(const char *str, int len)
1131 {
1132 if(len == 0)
1133 return;
1134 if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1135 {
1136 strbuf_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
1137 strbuffer = pp_xrealloc(strbuffer, strbuf_alloc * sizeof(strbuffer[0]));
1138 if(strbuf_alloc > 65536)
1139 ppy_warning("Reallocating string buffer larger than 64kB");
1140 }
1141 memcpy(&strbuffer[strbuf_idx], str, len);
1142 strbuf_idx += len;
1143 }
1145 static char *get_string(void)
1146 {
1147 char *str = pp_xmalloc(strbuf_idx + 1);
1148 memcpy(str, strbuffer, strbuf_idx);
1149 str[strbuf_idx] = '\0';
1150 #ifdef DEBUG
1151 strbuf_idx = 0;
1152 #endif
1153 return str;
1154 }
1156 static void put_string(void)
1157 {
1158 put_buffer(strbuffer, strbuf_idx);
1159 #ifdef DEBUG
1160 strbuf_idx = 0;
1161 #endif
1162 }
1164 static int string_start(void)
1165 {
1166 return str_startline;
1167 }
1170 /*
1171 *-------------------------------------------------------------------------
1172 * Buffer management
1173 *-------------------------------------------------------------------------
1174 */
1175 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1176 {
1177 if(ppy_debug)
1178 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1179 if(bufferstackidx >= MAXBUFFERSTACK)
1180 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1182 memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1183 bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1184 bufferstack[bufferstackidx].define = ppp;
1185 bufferstack[bufferstackidx].line_number = pp_status.line_number;
1186 bufferstack[bufferstackidx].char_number = pp_status.char_number;
1187 bufferstack[bufferstackidx].if_depth = pp_get_if_depth();
1188 bufferstack[bufferstackidx].should_pop = pop;
1189 bufferstack[bufferstackidx].filename = pp_status.input;
1190 bufferstack[bufferstackidx].ncontinuations = ncontinuations;
1191 bufferstack[bufferstackidx].incl = pp_incl_state;
1192 bufferstack[bufferstackidx].include_filename = incname;
1194 if(ppp)
1195 ppp->expanding = 1;
1196 else if(filename)
1197 {
1198 /* These will track the ppy_error to the correct file and line */
1199 pp_status.line_number = 1;
1200 pp_status.char_number = 1;
1201 pp_status.input = filename;
1202 ncontinuations = 0;
1203 }
1204 else if(!pop)
1205 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1206 bufferstackidx++;
1207 }
1209 static bufferstackentry_t *pop_buffer(void)
1210 {
1211 if(bufferstackidx < 0)
1212 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1214 if(bufferstackidx == 0)
1215 return NULL;
1217 bufferstackidx--;
1219 if(bufferstack[bufferstackidx].define)
1220 bufferstack[bufferstackidx].define->expanding = 0;
1221 else
1222 {
1223 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1224 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1225 pp_status.input = bufferstack[bufferstackidx].filename;
1226 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1227 if(!bufferstack[bufferstackidx].should_pop)
1228 {
1229 fclose(ppy_in);
1230 fprintf(ppy_out, "# %d \"%s\" 2\n", pp_status.line_number, pp_status.input);
1232 /* We have EOF, check the include logic */
1233 if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1234 {
1235 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1236 if(ppp)
1237 {
1238 includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1239 iep->ppp = ppp;
1240 ppp->iep = iep;
1241 iep->filename = bufferstack[bufferstackidx].include_filename;
1242 iep->prev = NULL;
1243 iep->next = pp_includelogiclist;
1244 if(iep->next)
1245 iep->next->prev = iep;
1246 pp_includelogiclist = iep;
1247 if(pp_status.debug)
1248 fprintf(stderr, "pop_buffer: %s:%d: includelogic added, include_ppp='%s', file='%s'\n", pp_status.input, pp_status.line_number, pp_incl_state.ppp, iep->filename);
1249 }
1250 else
1251 free(bufferstack[bufferstackidx].include_filename);
1252 }
1253 free(pp_incl_state.ppp);
1254 pp_incl_state = bufferstack[bufferstackidx].incl;
1256 }
1257 }
1259 if(ppy_debug)
1260 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1261 bufferstackidx,
1262 bufferstack[bufferstackidx].bufferstate,
1263 bufferstack[bufferstackidx].define,
1264 bufferstack[bufferstackidx].line_number,
1265 bufferstack[bufferstackidx].char_number,
1266 bufferstack[bufferstackidx].if_depth,
1267 bufferstack[bufferstackidx].filename,
1268 bufferstack[bufferstackidx].should_pop);
1270 ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1272 if(bufferstack[bufferstackidx].should_pop)
1273 {
1274 if(yy_current_state() == pp_macexp)
1275 macro_add_expansion();
1276 else
1277 pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1278 yy_pop_state();
1279 }
1281 return &bufferstack[bufferstackidx];
1282 }
1285 /*
1286 *-------------------------------------------------------------------------
1287 * Macro nestng support
1288 *-------------------------------------------------------------------------
1289 */
1290 static void push_macro(pp_entry_t *ppp)
1291 {
1292 if(macexpstackidx >= MAXMACEXPSTACK)
1293 ppy_error("Too many nested macros");
1295 macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1296 memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1297 macexpstack[macexpstackidx]->ppp = ppp;
1298 macexpstackidx++;
1299 }
1301 static macexpstackentry_t *top_macro(void)
1302 {
1303 return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1304 }
1306 static macexpstackentry_t *pop_macro(void)
1307 {
1308 if(macexpstackidx <= 0)
1309 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1310 return macexpstack[--macexpstackidx];
1311 }
1313 static void free_macro(macexpstackentry_t *mep)
1314 {
1315 int i;
1317 for(i = 0; i < mep->nargs; i++)
1318 free(mep->args[i]);
1319 free(mep->args);
1320 free(mep->nnls);
1321 free(mep->curarg);
1322 free(mep);
1323 }
1325 static void add_text_to_macro(const char *text, int len)
1326 {
1327 macexpstackentry_t *mep = top_macro();
1329 assert(mep->ppp->expanding == 0);
1331 if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1332 {
1333 mep->curargalloc += (ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1;
1334 mep->curarg = pp_xrealloc(mep->curarg, mep->curargalloc * sizeof(mep->curarg[0]));
1335 }
1336 memcpy(mep->curarg + mep->curargsize, text, len);
1337 mep->curargsize += len;
1338 mep->curarg[mep->curargsize] = '\0';
1339 }
1341 static void macro_add_arg(int last)
1342 {
1343 int nnl = 0;
1344 char *cptr;
1345 macexpstackentry_t *mep = top_macro();
1347 assert(mep->ppp->expanding == 0);
1349 mep->args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1350 mep->ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1351 mep->nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1352 mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1353 cptr = mep->args[mep->nargs]-1;
1354 while((cptr = strchr(cptr+1, '\n')))
1355 {
1356 nnl++;
1357 }
1358 mep->nnls[mep->nargs] = nnl;
1359 mep->nargs++;
1360 free(mep->curarg);
1361 mep->curargalloc = mep->curargsize = 0;
1362 mep->curarg = NULL;
1364 if(pp_flex_debug)
1365 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1366 pp_status.input,
1367 pp_status.line_number,
1368 mep->nargs-1,
1369 mep->args[mep->nargs-1]);
1371 /* Each macro argument must be expanded to cope with stingize */
1372 if(last || mep->args[mep->nargs-1][0])
1373 {
1374 yy_push_state(pp_macexp);
1375 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1376 yy_scan_string(mep->args[mep->nargs-1]);
1377 /*mep->bufferstackidx = bufferstackidx; But not nested! */
1378 }
1379 }
1381 static void macro_add_expansion(void)
1382 {
1383 macexpstackentry_t *mep = top_macro();
1385 assert(mep->ppp->expanding == 0);
1387 mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1388 free(mep->curarg);
1389 mep->curargalloc = mep->curargsize = 0;
1390 mep->curarg = NULL;
1392 if(pp_flex_debug)
1393 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1394 pp_status.input,
1395 pp_status.line_number,
1396 mep->nargs-1,
1397 mep->ppargs[mep->nargs-1]);
1398 }
1401 /*
1402 *-------------------------------------------------------------------------
1403 * Output management
1404 *-------------------------------------------------------------------------
1405 */
1406 static void put_buffer(const char *s, int len)
1407 {
1408 if(top_macro())
1409 add_text_to_macro(s, len);
1410 else
1411 fwrite(s, 1, len, ppy_out);
1412 }
1415 /*
1416 *-------------------------------------------------------------------------
1417 * Include management
1418 *-------------------------------------------------------------------------
1419 */
1420 void pp_do_include(char *fname, int type)
1421 {
1422 char *newpath;
1423 int n;
1424 includelogicentry_t *iep;
1426 for(iep = pp_includelogiclist; iep; iep = iep->next)
1427 {
1428 if(!strcmp(iep->filename, fname))
1429 {
1430 /*
1431 * We are done. The file was included before.
1432 * If the define was deleted, then this entry would have
1433 * been deleted too.
1434 */
1435 return;
1436 }
1437 }
1439 n = strlen(fname);
1441 if(n <= 2)
1442 ppy_error("Empty include filename");
1444 /* Undo the effect of the quotation */
1445 fname[n-1] = '\0';
1447 if((ppy_in = pp_open_include(fname+1, type ? pp_status.input : NULL, &newpath)) == NULL)
1448 ppy_error("Unable to open include file %s", fname+1);
1450 fname[n-1] = *fname; /* Redo the quotes */
1451 push_buffer(NULL, newpath, fname, 0);
1452 pp_incl_state.seen_junk = 0;
1453 pp_incl_state.state = 0;
1454 pp_incl_state.ppp = NULL;
1456 if(pp_status.debug)
1457 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
1458 pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
1459 ppy__switch_to_buffer(ppy__create_buffer(ppy_in, YY_BUF_SIZE));
1461 fprintf(ppy_out, "# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1462 }
1464 /*
1465 *-------------------------------------------------------------------------
1466 * Push/pop preprocessor ignore state when processing conditionals
1467 * which are false.
1468 *-------------------------------------------------------------------------
1469 */
1470 void pp_push_ignore_state(void)
1471 {
1472 yy_push_state(pp_ignore);
1473 }
1475 void pp_pop_ignore_state(void)
1476 {
1477 yy_pop_state();
1478 }