| blob | 020f91f881af5226144f63bfd5e234b0b3099ec5 |
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 nounput
130 %option prefix="pp"
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 <stdio.h>
160 #include <stdlib.h>
161 #include <string.h>
162 #include <ctype.h>
163 #include <assert.h>
165 #include "wpp_private.h"
166 #include "ppy.tab.h"
168 /*
169 * Make sure that we are running an appropriate version of flex.
170 */
171 #if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
172 #error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
173 #endif
175 #define YY_USE_PROTOS
176 #define YY_NO_UNPUT
177 #define YY_READ_BUF_SIZE 65536 /* So we read most of a file at once */
179 #define yy_current_state() YY_START
180 #define yy_pp_state(x) yy_pop_state(); yy_push_state(x)
182 /*
183 * Always update the current character position within a line
184 */
185 #define YY_USER_ACTION pp_status.char_number+=ppleng;
187 /*
188 * Buffer management for includes and expansions
189 */
190 #define MAXBUFFERSTACK 128 /* Nesting more than 128 includes or macro expansion textss is insane */
192 typedef struct bufferstackentry {
193 YY_BUFFER_STATE bufferstate; /* Buffer to switch back to */
194 pp_entry_t *define; /* Points to expanding define or NULL if handling includes */
195 int line_number; /* Line that we were handling */
196 int char_number; /* The current position on that line */
197 const char *filename; /* Filename that we were handling */
198 int if_depth; /* How many #if:s deep to check matching #endif:s */
199 int ncontinuations; /* Remember the continuation state */
200 int should_pop; /* Set if we must pop the start-state on EOF */
201 /* Include management */
202 include_state_t incl;
203 char *include_filename;
204 int pass_data;
205 } bufferstackentry_t;
207 #define ALLOCBLOCKSIZE (1 << 10) /* Allocate these chunks at a time for string-buffers */
209 /*
210 * Macro expansion nesting
211 * We need the stack to handle expansions while scanning
212 * a macro's arguments. The TOS must always be the macro
213 * that receives the current expansion from the scanner.
214 */
215 #define MAXMACEXPSTACK 128 /* Nesting more than 128 macro expansions is insane */
217 typedef struct macexpstackentry {
218 pp_entry_t *ppp; /* This macro we are scanning */
219 char **args; /* With these arguments */
220 char **ppargs; /* Resulting in these preprocessed arguments */
221 int *nnls; /* Number of newlines per argument */
222 int nargs; /* And this many arguments scanned */
223 int parentheses; /* Nesting level of () */
224 int curargsize; /* Current scanning argument's size */
225 int curargalloc; /* Current scanning argument's block allocated */
226 char *curarg; /* Current scanning argument's content */
227 } macexpstackentry_t;
229 #define MACROPARENTHESES() (top_macro()->parentheses)
231 /*
232 * Prototypes
233 */
234 static void newline(int);
235 static int make_number(int radix, YYSTYPE *val, const char *str, int len);
236 static void put_buffer(const char *s, int len);
237 static int is_c_h_include(char *fname, int quoted);
238 /* Buffer management */
239 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
240 static bufferstackentry_t *pop_buffer(void);
241 /* String functions */
242 static void new_string(void);
243 static void add_string(const char *str, int len);
244 static char *get_string(void);
245 static void put_string(void);
246 static int string_start(void);
247 /* Macro functions */
248 static void push_macro(pp_entry_t *ppp);
249 static macexpstackentry_t *top_macro(void);
250 static macexpstackentry_t *pop_macro(void);
251 static void free_macro(macexpstackentry_t *mep);
252 static void add_text_to_macro(const char *text, int len);
253 static void macro_add_arg(int last);
254 static void macro_add_expansion(void);
255 /* Expansion */
256 static void expand_special(pp_entry_t *ppp);
257 static void expand_define(pp_entry_t *ppp);
258 static void expand_macro(macexpstackentry_t *mep);
260 /*
261 * Local variables
262 */
263 static int ncontinuations;
265 static int strbuf_idx = 0;
266 static int strbuf_alloc = 0;
267 static char *strbuffer = NULL;
268 static int str_startline;
270 static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
271 static int macexpstackidx = 0;
273 static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
274 static int bufferstackidx = 0;
276 static int pass_data=1;
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]+ pperror("Invalid preprocessor token '%s'", pptext);
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? pperror("Preprocessor junk '%s'", pptext);
336 <pp_pp>. return *pptext;
338 /*
339 * Handle #include and #line
340 */
341 <pp_line>[0-9]+ return make_number(10, &pplval, pptext, ppleng);
342 <pp_inc>\< new_string(); add_string(pptext, ppleng); yy_push_state(pp_iqs);
343 <pp_inc,pp_line>\" new_string(); add_string(pptext, ppleng); 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?)|(.) pperror(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, &pplval, pptext, ppleng);
365 <pp_if>0[0-7]*[8-9]+{ul}? pperror("Invalid octal digit");
366 <pp_if>[1-9][0-9]*{ul}? return make_number(10, &pplval, pptext, ppleng);
367 <pp_if>0[xX][0-9a-fA-F]+{ul}? return make_number(16, &pplval, pptext, ppleng);
368 <pp_if>0[xX] pperror("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? pperror("Junk in conditional expression");
381 <pp_if>{ws}+ ;
382 <pp_if>\' new_string(); add_string(pptext, ppleng); yy_push_state(pp_sqs);
383 <pp_if>\" pperror("String constants not allowed in conditionals");
384 <pp_if>. return *pptext;
386 /*
387 * Handle #ifdef, #ifndef and #undef
388 * to get only an untranslated/unexpanded identifier
389 */
390 <pp_ifd>{cident} pplval.cptr = pp_xstrdup(pptext); 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?)|(.) pperror("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>. pperror("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(); pplval.cptr = pp_xstrdup(pptext); return tIDENT;
410 <pp_defined>{ws}+ ;
411 <pp_defined>(\()|(\)) return *pptext;
412 <pp_defined>\\\r?\n newline(0);
413 <pp_defined>(\\.)|(\n)|(.) pperror("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) { pplval.cptr = pp_xstrdup(pptext); return tLITERAL; }
422 <pp_eol>\/[^/\\\n*]* if(yy_top_state() != pp_ignore) { pplval.cptr = pp_xstrdup(pptext); return tLITERAL; }
423 <pp_eol>(\\\r?)|(\/[^/*]) if(yy_top_state() != pp_ignore) { pplval.cptr = pp_xstrdup(pptext); 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}\( pplval.cptr = pp_xstrdup(pptext); pplval.cptr[ppleng-1] = '\0'; yy_pp_state(pp_macro); return tMACRO;
431 <pp_def>{cident} pplval.cptr = pp_xstrdup(pptext); yy_pp_state(pp_define); return tDEFINE;
432 <pp_def>{ws}+ ;
433 <pp_def>\\\r?\n newline(0);
434 <pp_def>(\\\r?)|(\n)|(.) perror("Identifier expected");
436 /*
437 * Scan the substitution of a define
438 */
439 <pp_define>[^'"/\\\n]+ pplval.cptr = pp_xstrdup(pptext); return tLITERAL;
440 <pp_define>(\\\r?)|(\/[^/*]) pplval.cptr = pp_xstrdup(pptext); return tLITERAL;
441 <pp_define>\\\r?\n{ws}+ newline(0); pplval.cptr = pp_xstrdup(" "); return tLITERAL;
442 <pp_define>\\\r?\n newline(0);
443 <pp_define>\n newline(1); yy_pop_state(); return tNL;
444 <pp_define>\' new_string(); add_string(pptext, ppleng); yy_push_state(pp_sqs);
445 <pp_define>\" new_string(); add_string(pptext, ppleng); yy_push_state(pp_dqs);
447 /*
448 * Scan the definition macro arguments
449 */
450 <pp_macro>\){ws}* yy_pp_state(pp_mbody); return tMACROEND;
451 <pp_macro>{ws}+ ;
452 <pp_macro>{cident} pplval.cptr = pp_xstrdup(pptext); return tIDENT;
453 <pp_macro>, return ',';
454 <pp_macro>"..." return tELIPSIS;
455 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?) pperror("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]+ pplval.cptr = pp_xstrdup(pptext); return tLITERAL;
462 <pp_mbody>{cident} pplval.cptr = pp_xstrdup(pptext); return tIDENT;
463 <pp_mbody>\#\# return tCONCAT;
464 <pp_mbody>\# return tSTRINGIZE;
465 <pp_mbody>[0-9][^'"#/\\\n]* pplval.cptr = pp_xstrdup(pptext); return tLITERAL;
466 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*) pplval.cptr = pp_xstrdup(pptext); return tLITERAL;
467 <pp_mbody>\\\r?\n{ws}+ newline(0); pplval.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(pptext, ppleng); yy_push_state(pp_sqs);
471 <pp_mbody>\" new_string(); add_string(pptext, ppleng); 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(pptext, ppleng);
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>\( {
501 if(++MACROPARENTHESES() > 1)
502 add_text_to_macro(pptext, ppleng);
503 }
504 <pp_macscan>\) {
505 if(--MACROPARENTHESES() == 0)
506 {
507 yy_pop_state();
508 macro_add_arg(1);
509 }
510 else
511 add_text_to_macro(pptext, ppleng);
512 }
513 <pp_macscan>, {
514 if(MACROPARENTHESES() > 1)
515 add_text_to_macro(pptext, ppleng);
516 else
517 macro_add_arg(0);
518 }
519 <pp_macscan>\" new_string(); add_string(pptext, ppleng); yy_push_state(pp_dqs);
520 <pp_macscan>\' new_string(); add_string(pptext, ppleng); 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(pptext, ppleng);
523 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.) add_text_to_macro(pptext, ppleng);
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(pptext[ppleng-1] == '\\')
539 ppwarning("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(pptext, ppleng); yy_push_state(pp_dqs);
546 <INITIAL,pp_macexp>\' pp_incl_state.seen_junk++; new_string(); add_string(pptext, ppleng); yy_push_state(pp_sqs);
547 <pp_dqs>[^"\\\n]+ add_string(pptext, ppleng);
548 <pp_dqs>\" {
549 add_string(pptext, ppleng);
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 pplval.cptr = get_string();
560 return tDQSTRING;
561 case pp_line:
562 pplval.cptr = get_string();
563 if (is_c_h_include(pplval.cptr, 1)) pass_data=0;
564 else pass_data=1;
565 return tDQSTRING;
566 default:
567 put_string();
568 }
569 }
570 <pp_sqs>[^'\\\n]+ add_string(pptext, ppleng);
571 <pp_sqs>\' {
572 add_string(pptext, ppleng);
573 yy_pop_state();
574 switch(yy_current_state())
575 {
576 case pp_if:
577 case pp_define:
578 case pp_mbody:
579 pplval.cptr = get_string();
580 return tSQSTRING;
581 default:
582 put_string();
583 }
584 }
585 <pp_iqs>[^\>\\\n]+ add_string(pptext, ppleng);
586 <pp_iqs>\> {
587 add_string(pptext, ppleng);
588 yy_pop_state();
589 pplval.cptr = get_string();
590 return tIQSTRING;
591 }
592 <pp_dqs>\\\r?\n {
593 /*
594 * This is tricky; we need to remove the line-continuation
595 * from preprocessor strings, but OTOH retain them in all
596 * other strings. This is because the resource grammar is
597 * even more braindead than initially analysed and line-
598 * continuations in strings introduce, sigh, newlines in
599 * the output. There goes the concept of non-breaking, non-
600 * spacing whitespace.
601 */
602 switch(yy_top_state())
603 {
604 case pp_pp:
605 case pp_define:
606 case pp_mbody:
607 case pp_inc:
608 case pp_line:
609 newline(0);
610 break;
611 default:
612 add_string(pptext, ppleng);
613 newline(-1);
614 }
615 }
616 <pp_iqs,pp_dqs,pp_sqs>\\. add_string(pptext, ppleng);
617 <pp_iqs,pp_dqs,pp_sqs>\n {
618 newline(1);
619 add_string(pptext, ppleng);
620 ppwarning("Newline in string constant encounterd (started line %d)", string_start());
621 }
623 /*
624 * Identifier scanning
625 */
626 <INITIAL,pp_if,pp_inc,pp_macexp>{cident} {
627 pp_entry_t *ppp;
628 pp_incl_state.seen_junk++;
629 if(!(ppp = pplookup(pptext)))
630 {
631 if(yy_current_state() == pp_inc)
632 pperror("Expected include filename");
634 if(yy_current_state() == pp_if)
635 {
636 pplval.cptr = pp_xstrdup(pptext);
637 return tIDENT;
638 }
639 else {
640 if((yy_current_state()==INITIAL) && (strcasecmp(pptext,"RCINCLUDE")==0)){
641 yy_push_state(RCINCL);
642 return tRCINCLUDE;
643 }
644 else put_buffer(pptext, ppleng);
645 }
646 }
647 else if(!ppp->expanding)
648 {
649 switch(ppp->type)
650 {
651 case def_special:
652 expand_special(ppp);
653 break;
654 case def_define:
655 expand_define(ppp);
656 break;
657 case def_macro:
658 yy_push_state(pp_macign);
659 push_macro(ppp);
660 break;
661 default:
662 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
663 }
664 }
665 }
667 /*
668 * Everything else that needs to be passed and
669 * newline and continuation handling
670 */
671 <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(pptext, ppleng);
672 <INITIAL,pp_macexp>{ws}+ put_buffer(pptext, ppleng);
673 <INITIAL>\n newline(1);
674 <INITIAL>\\\r?\n newline(0);
675 <INITIAL>\\\r? pp_incl_state.seen_junk++; put_buffer(pptext, ppleng);
677 /*
678 * Special catcher for macro argmument expansion to prevent
679 * newlines to propagate to the output or admin.
680 */
681 <pp_macexp>(\n)|(.)|(\\\r?(\n|.)) put_buffer(pptext, ppleng);
683 <RCINCL>[A-Za-z0-9_\.\\/]+ {
684 pplval.cptr=pp_xstrdup(pptext);
685 yy_pop_state();
686 return tRCINCLUDEPATH;
687 }
689 <RCINCL>{ws}+ ;
691 <RCINCL>\" {
692 new_string(); add_string(pptext,ppleng);yy_push_state(pp_dqs);
693 }
695 /*
696 * This is a 'catch-all' rule to discover errors in the scanner
697 * in an orderly manner.
698 */
699 <*>. pp_incl_state.seen_junk++; ppwarning("Unmatched text '%c' (0x%02x); please report\n", isprint(*pptext & 0xff) ? *pptext : ' ', *pptext);
701 <<EOF>> {
702 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
703 bufferstackentry_t *bep = pop_buffer();
705 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
706 ppwarning("Unmatched #if/#endif at end of file");
708 if(!bep)
709 {
710 if(YY_START != INITIAL)
711 pperror("Unexpected end of file during preprocessing");
712 yyterminate();
713 }
714 else if(bep->should_pop == 2)
715 {
716 macexpstackentry_t *mac;
717 mac = pop_macro();
718 expand_macro(mac);
719 }
720 pp_delete_buffer(b);
721 }
723 %%
724 /*
725 **************************************************************************
726 * Support functions
727 **************************************************************************
728 */
730 #ifndef ppwrap
731 int ppwrap(void)
732 {
733 return 1;
734 }
735 #endif
738 /*
739 *-------------------------------------------------------------------------
740 * Output newlines or set them as continuations
741 *
742 * Input: -1 - Don't count this one, but update local position (see pp_dqs)
743 * 0 - Line-continuation seen and cache output
744 * 1 - Newline seen and flush output
745 *-------------------------------------------------------------------------
746 */
747 static void newline(int dowrite)
748 {
749 pp_status.line_number++;
750 pp_status.char_number = 1;
752 if(dowrite == -1)
753 return;
755 ncontinuations++;
756 if(dowrite)
757 {
758 for(;ncontinuations; ncontinuations--)
759 put_buffer("\n", 1);
760 }
761 }
764 /*
765 *-------------------------------------------------------------------------
766 * Make a number out of an any-base and suffixed string
767 *
768 * Possible number extensions:
769 * - "" int
770 * - "L" long int
771 * - "LL" long long int
772 * - "U" unsigned int
773 * - "UL" unsigned long int
774 * - "ULL" unsigned long long int
775 * - "LU" unsigned long int
776 * - "LLU" unsigned long long int
777 * - "LUL" invalid
778 *
779 * FIXME:
780 * The sizes of resulting 'int' and 'long' are compiler specific.
781 * I depend on sizeof(int) > 2 here (although a relatively safe
782 * assumption).
783 * Long longs are not yet implemented because this is very compiler
784 * specific and I don't want to think too much about the problems.
785 *
786 *-------------------------------------------------------------------------
787 */
788 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
789 {
790 int is_l = 0;
791 int is_ll = 0;
792 int is_u = 0;
793 char ext[4];
795 ext[3] = '\0';
796 ext[2] = toupper(str[len-1]);
797 ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
798 ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
800 if(!strcmp(ext, "LUL"))
801 pperror("Invalid constant suffix");
802 else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
803 {
804 is_ll++;
805 is_u++;
806 }
807 else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
808 {
809 is_l++;
810 is_u++;
811 }
812 else if(!strcmp(ext+1, "LL"))
813 {
814 is_ll++;
815 }
816 else if(!strcmp(ext+2, "L"))
817 {
818 is_l++;
819 }
820 else if(!strcmp(ext+2, "U"))
821 {
822 is_u++;
823 }
825 if(is_ll)
826 pp_internal_error(__FILE__, __LINE__, "long long constants not implemented yet");
828 if(is_u && is_l)
829 {
830 val->ulong = strtoul(str, NULL, radix);
831 return tULONG;
832 }
833 else if(!is_u && is_l)
834 {
835 val->slong = strtol(str, NULL, radix);
836 return tSLONG;
837 }
838 else if(is_u && !is_l)
839 {
840 val->uint = (unsigned int)strtoul(str, NULL, radix);
841 return tUINT;
842 }
844 /* Else it must be an int... */
845 val->sint = (int)strtol(str, NULL, radix);
846 return tSINT;
847 }
850 /*
851 *-------------------------------------------------------------------------
852 * Macro and define expansion support
853 *
854 * FIXME: Variable macro arguments.
855 *-------------------------------------------------------------------------
856 */
857 static void expand_special(pp_entry_t *ppp)
858 {
859 const char *dbgtext = "?";
860 static char *buf = NULL;
862 assert(ppp->type == def_special);
864 if(!strcmp(ppp->ident, "__LINE__"))
865 {
866 dbgtext = "def_special(__LINE__)";
867 buf = pp_xrealloc(buf, 32);
868 sprintf(buf, "%d", pp_status.line_number);
869 }
870 else if(!strcmp(ppp->ident, "__FILE__"))
871 {
872 dbgtext = "def_special(__FILE__)";
873 buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
874 sprintf(buf, "\"%s\"", pp_status.input);
875 }
876 else
877 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
879 if(pp_flex_debug)
880 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
881 macexpstackidx,
882 pp_status.input,
883 pp_status.line_number,
884 ppp->ident,
885 buf ? buf : "");
887 if(buf && buf[0])
888 {
889 push_buffer(ppp, NULL, NULL, 0);
890 yy_scan_string(buf);
891 }
892 }
894 static void expand_define(pp_entry_t *ppp)
895 {
896 assert(ppp->type == def_define);
898 if(pp_flex_debug)
899 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
900 macexpstackidx,
901 pp_status.input,
902 pp_status.line_number,
903 ppp->ident,
904 ppp->subst.text);
905 if(ppp->subst.text && ppp->subst.text[0])
906 {
907 push_buffer(ppp, NULL, NULL, 0);
908 yy_scan_string(ppp->subst.text);
909 }
910 }
912 static int curdef_idx = 0;
913 static int curdef_alloc = 0;
914 static char *curdef_text = NULL;
916 static void add_text(const char *str, int len)
917 {
918 if(len == 0)
919 return;
920 if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
921 {
922 curdef_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
923 curdef_text = pp_xrealloc(curdef_text, curdef_alloc * sizeof(curdef_text[0]));
924 if(curdef_alloc > 65536)
925 ppwarning("Reallocating macro-expansion buffer larger than 64kB");
926 }
927 memcpy(&curdef_text[curdef_idx], str, len);
928 curdef_idx += len;
929 }
931 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
932 {
933 char *cptr;
934 char *exp;
935 int tag;
936 int n;
938 if(mtp == NULL)
939 return NULL;
941 switch(mtp->type)
942 {
943 case exp_text:
944 if(pp_flex_debug)
945 fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
946 add_text(mtp->subst.text, strlen(mtp->subst.text));
947 break;
949 case exp_stringize:
950 if(pp_flex_debug)
951 fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
952 mtp->subst.argidx,
953 mep->args[mtp->subst.argidx]);
954 cptr = mep->args[mtp->subst.argidx];
955 add_text("\"", 1);
956 while(*cptr)
957 {
958 if(*cptr == '"' || *cptr == '\\')
959 add_text("\\", 1);
960 add_text(cptr, 1);
961 cptr++;
962 }
963 add_text("\"", 1);
964 break;
966 case exp_concat:
967 if(pp_flex_debug)
968 fprintf(stderr, "add_expand_text: exp_concat\n");
969 /* Remove trailing whitespace from current expansion text */
970 while(curdef_idx)
971 {
972 if(isspace(curdef_text[curdef_idx-1] & 0xff))
973 curdef_idx--;
974 else
975 break;
976 }
977 /* tag current position and recursively expand the next part */
978 tag = curdef_idx;
979 mtp = add_expand_text(mtp->next, mep, nnl);
981 /* Now get rid of the leading space of the expansion */
982 cptr = &curdef_text[tag];
983 n = curdef_idx - tag;
984 while(n)
985 {
986 if(isspace(*cptr & 0xff))
987 {
988 cptr++;
989 n--;
990 }
991 else
992 break;
993 }
994 if(cptr != &curdef_text[tag])
995 {
996 memmove(&curdef_text[tag], cptr, n);
997 curdef_idx -= (curdef_idx - tag) - n;
998 }
999 break;
1001 case exp_subst:
1002 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1003 exp = mep->args[mtp->subst.argidx];
1004 else
1005 exp = mep->ppargs[mtp->subst.argidx];
1006 if(exp)
1007 {
1008 add_text(exp, strlen(exp));
1009 *nnl -= mep->nnls[mtp->subst.argidx];
1010 cptr = strchr(exp, '\n');
1011 while(cptr)
1012 {
1013 *cptr = ' ';
1014 cptr = strchr(cptr+1, '\n');
1015 }
1016 mep->nnls[mtp->subst.argidx] = 0;
1017 }
1018 if(pp_flex_debug)
1019 fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1020 break;
1022 default:
1023 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1024 }
1025 return mtp;
1026 }
1028 static void expand_macro(macexpstackentry_t *mep)
1029 {
1030 mtext_t *mtp;
1031 int n, k;
1032 char *cptr;
1033 int nnl = 0;
1034 pp_entry_t *ppp = mep->ppp;
1035 int nargs = mep->nargs;
1037 assert(ppp->type == def_macro);
1038 assert(ppp->expanding == 0);
1040 if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1041 pperror("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1043 for(n = 0; n < nargs; n++)
1044 nnl += mep->nnls[n];
1046 if(pp_flex_debug)
1047 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1048 macexpstackidx,
1049 pp_status.input,
1050 pp_status.line_number,
1051 ppp->ident,
1052 mep->nargs,
1053 nnl);
1055 curdef_idx = 0;
1057 for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1058 {
1059 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1060 break;
1061 }
1063 for(n = 0; n < nnl; n++)
1064 add_text("\n", 1);
1066 /* To make sure there is room and termination (see below) */
1067 add_text(" \0", 2);
1069 /* Strip trailing whitespace from expansion */
1070 for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1071 {
1072 if(!isspace(*cptr & 0xff))
1073 break;
1074 }
1076 /*
1077 * We must add *one* whitespace to make sure that there
1078 * is a token-separation after the expansion.
1079 */
1080 *(++cptr) = ' ';
1081 *(++cptr) = '\0';
1082 k++;
1084 /* Strip leading whitespace from expansion */
1085 for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1086 {
1087 if(!isspace(*cptr & 0xff))
1088 break;
1089 }
1091 if(k - n > 0)
1092 {
1093 if(pp_flex_debug)
1094 fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1095 push_buffer(ppp, NULL, NULL, 0);
1096 /*yy_scan_bytes(curdef_text + n, k - n);*/
1097 yy_scan_string(curdef_text + n);
1098 }
1099 }
1101 /*
1102 *-------------------------------------------------------------------------
1103 * String collection routines
1104 *-------------------------------------------------------------------------
1105 */
1106 static void new_string(void)
1107 {
1108 #ifdef DEBUG
1109 if(strbuf_idx)
1110 ppwarning("new_string: strbuf_idx != 0");
1111 #endif
1112 strbuf_idx = 0;
1113 str_startline = pp_status.line_number;
1114 }
1116 static void add_string(const char *str, int len)
1117 {
1118 if(len == 0)
1119 return;
1120 if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1121 {
1122 strbuf_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
1123 strbuffer = pp_xrealloc(strbuffer, strbuf_alloc * sizeof(strbuffer[0]));
1124 if(strbuf_alloc > 65536)
1125 ppwarning("Reallocating string buffer larger than 64kB");
1126 }
1127 memcpy(&strbuffer[strbuf_idx], str, len);
1128 strbuf_idx += len;
1129 }
1131 static char *get_string(void)
1132 {
1133 char *str = pp_xmalloc(strbuf_idx + 1);
1134 memcpy(str, strbuffer, strbuf_idx);
1135 str[strbuf_idx] = '\0';
1136 #ifdef DEBUG
1137 strbuf_idx = 0;
1138 #endif
1139 return str;
1140 }
1142 static void put_string(void)
1143 {
1144 put_buffer(strbuffer, strbuf_idx);
1145 #ifdef DEBUG
1146 strbuf_idx = 0;
1147 #endif
1148 }
1150 static int string_start(void)
1151 {
1152 return str_startline;
1153 }
1156 /*
1157 *-------------------------------------------------------------------------
1158 * Buffer management
1159 *-------------------------------------------------------------------------
1160 */
1161 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1162 {
1163 if(ppdebug)
1164 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1165 if(bufferstackidx >= MAXBUFFERSTACK)
1166 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1168 memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1169 bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1170 bufferstack[bufferstackidx].define = ppp;
1171 bufferstack[bufferstackidx].line_number = pp_status.line_number;
1172 bufferstack[bufferstackidx].char_number = pp_status.char_number;
1173 bufferstack[bufferstackidx].if_depth = pp_get_if_depth();
1174 bufferstack[bufferstackidx].should_pop = pop;
1175 bufferstack[bufferstackidx].filename = pp_status.input;
1176 bufferstack[bufferstackidx].ncontinuations = ncontinuations;
1177 bufferstack[bufferstackidx].incl = pp_incl_state;
1178 bufferstack[bufferstackidx].include_filename = incname;
1179 bufferstack[bufferstackidx].pass_data = pass_data;
1181 if(ppp)
1182 ppp->expanding = 1;
1183 else if(filename)
1184 {
1185 /* These will track the pperror to the correct file and line */
1186 pp_status.line_number = 1;
1187 pp_status.char_number = 1;
1188 pp_status.input = filename;
1189 ncontinuations = 0;
1190 }
1191 else if(!pop)
1192 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1193 bufferstackidx++;
1194 }
1196 static bufferstackentry_t *pop_buffer(void)
1197 {
1198 if(bufferstackidx < 0)
1199 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1201 if(bufferstackidx == 0)
1202 return NULL;
1204 bufferstackidx--;
1206 if(bufferstack[bufferstackidx].define)
1207 bufferstack[bufferstackidx].define->expanding = 0;
1208 else
1209 {
1210 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1211 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1212 pp_status.input = bufferstack[bufferstackidx].filename;
1213 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1214 if(!bufferstack[bufferstackidx].should_pop)
1215 {
1216 fclose(ppin);
1217 fprintf(ppout, "# %d \"%s\" 2\n", pp_status.line_number, pp_status.input);
1219 /* We have EOF, check the include logic */
1220 if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1221 {
1222 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1223 if(ppp)
1224 {
1225 includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1226 iep->ppp = ppp;
1227 ppp->iep = iep;
1228 iep->filename = bufferstack[bufferstackidx].include_filename;
1229 iep->prev = NULL;
1230 iep->next = pp_includelogiclist;
1231 if(iep->next)
1232 iep->next->prev = iep;
1233 pp_includelogiclist = iep;
1234 if(pp_status.debug)
1235 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);
1236 }
1237 else if(bufferstack[bufferstackidx].include_filename)
1238 free(bufferstack[bufferstackidx].include_filename);
1239 }
1240 if(pp_incl_state.ppp)
1241 free(pp_incl_state.ppp);
1242 pp_incl_state = bufferstack[bufferstackidx].incl;
1243 pass_data = bufferstack[bufferstackidx].pass_data;
1245 }
1246 }
1248 if(ppdebug)
1249 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1250 bufferstackidx,
1251 bufferstack[bufferstackidx].bufferstate,
1252 bufferstack[bufferstackidx].define,
1253 bufferstack[bufferstackidx].line_number,
1254 bufferstack[bufferstackidx].char_number,
1255 bufferstack[bufferstackidx].if_depth,
1256 bufferstack[bufferstackidx].filename,
1257 bufferstack[bufferstackidx].should_pop);
1259 pp_switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1261 if(bufferstack[bufferstackidx].should_pop)
1262 {
1263 if(yy_current_state() == pp_macexp)
1264 macro_add_expansion();
1265 else
1266 pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1267 yy_pop_state();
1268 }
1270 return &bufferstack[bufferstackidx];
1271 }
1274 /*
1275 *-------------------------------------------------------------------------
1276 * Macro nestng support
1277 *-------------------------------------------------------------------------
1278 */
1279 static void push_macro(pp_entry_t *ppp)
1280 {
1281 if(macexpstackidx >= MAXMACEXPSTACK)
1282 pperror("Too many nested macros");
1284 macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1285 memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1286 macexpstack[macexpstackidx]->ppp = ppp;
1287 macexpstackidx++;
1288 }
1290 static macexpstackentry_t *top_macro(void)
1291 {
1292 return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1293 }
1295 static macexpstackentry_t *pop_macro(void)
1296 {
1297 if(macexpstackidx <= 0)
1298 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1299 return macexpstack[--macexpstackidx];
1300 }
1302 static void free_macro(macexpstackentry_t *mep)
1303 {
1304 int i;
1306 for(i = 0; i < mep->nargs; i++)
1307 free(mep->args[i]);
1308 if(mep->args)
1309 free(mep->args);
1310 if(mep->nnls)
1311 free(mep->nnls);
1312 if(mep->curarg)
1313 free(mep->curarg);
1314 free(mep);
1315 }
1317 static void add_text_to_macro(const char *text, int len)
1318 {
1319 macexpstackentry_t *mep = top_macro();
1321 assert(mep->ppp->expanding == 0);
1323 if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1324 {
1325 mep->curargalloc += (ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1;
1326 mep->curarg = pp_xrealloc(mep->curarg, mep->curargalloc * sizeof(mep->curarg[0]));
1327 }
1328 memcpy(mep->curarg + mep->curargsize, text, len);
1329 mep->curargsize += len;
1330 mep->curarg[mep->curargsize] = '\0';
1331 }
1333 static void macro_add_arg(int last)
1334 {
1335 int nnl = 0;
1336 char *cptr;
1337 macexpstackentry_t *mep = top_macro();
1339 assert(mep->ppp->expanding == 0);
1341 mep->args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1342 mep->ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1343 mep->nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1344 mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1345 cptr = mep->args[mep->nargs]-1;
1346 while((cptr = strchr(cptr+1, '\n')))
1347 {
1348 nnl++;
1349 }
1350 mep->nnls[mep->nargs] = nnl;
1351 mep->nargs++;
1352 free(mep->curarg);
1353 mep->curargalloc = mep->curargsize = 0;
1354 mep->curarg = NULL;
1356 if(pp_flex_debug)
1357 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1358 pp_status.input,
1359 pp_status.line_number,
1360 mep->nargs-1,
1361 mep->args[mep->nargs-1]);
1363 /* Each macro argument must be expanded to cope with stingize */
1364 if(last || mep->args[mep->nargs-1][0])
1365 {
1366 yy_push_state(pp_macexp);
1367 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1368 yy_scan_string(mep->args[mep->nargs-1]);
1369 /*mep->bufferstackidx = bufferstackidx; But not nested! */
1370 }
1371 }
1373 static void macro_add_expansion(void)
1374 {
1375 macexpstackentry_t *mep = top_macro();
1377 assert(mep->ppp->expanding == 0);
1379 mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1380 free(mep->curarg);
1381 mep->curargalloc = mep->curargsize = 0;
1382 mep->curarg = NULL;
1384 if(pp_flex_debug)
1385 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1386 pp_status.input,
1387 pp_status.line_number,
1388 mep->nargs-1,
1389 mep->ppargs[mep->nargs-1]);
1390 }
1393 /*
1394 *-------------------------------------------------------------------------
1395 * Output management
1396 *-------------------------------------------------------------------------
1397 */
1398 static void put_buffer(const char *s, int len)
1399 {
1400 if(top_macro())
1401 add_text_to_macro(s, len);
1402 else {
1403 if(pass_data)
1404 fwrite(s, 1, len, ppout);
1405 }
1406 }
1409 /*
1410 *-------------------------------------------------------------------------
1411 * Include management
1412 *-------------------------------------------------------------------------
1413 */
1414 static int is_c_h_include(char *fname, int quoted)
1415 {
1416 int sl=strlen(fname);
1417 if (sl < 2 + 2 * quoted) return 0;
1418 if ((toupper(fname[sl-1-quoted])!='H') && (toupper(fname[sl-1-quoted])!='C')) return 0;
1419 if (fname[sl-2-quoted]!='.') return 0;
1420 return 1;
1421 }
1423 void pp_do_include(char *fname, int type)
1424 {
1425 char *newpath;
1426 int n;
1427 includelogicentry_t *iep;
1429 for(iep = pp_includelogiclist; iep; iep = iep->next)
1430 {
1431 if(!strcmp(iep->filename, fname))
1432 {
1433 /*
1434 * We are done. The file was included before.
1435 * If the define was deleted, then this entry would have
1436 * been deleted too.
1437 */
1438 return;
1439 }
1440 }
1442 n = strlen(fname);
1444 if(n <= 2)
1445 pperror("Empty include filename");
1447 /* Undo the effect of the quotation */
1448 fname[n-1] = '\0';
1450 if((ppin = pp_open_include(fname+1, type ? pp_status.input : NULL, &newpath)) == NULL)
1451 pperror("Unable to open include file %s", fname+1);
1453 fname[n-1] = *fname; /* Redo the quotes */
1454 push_buffer(NULL, newpath, fname, 0);
1455 pp_incl_state.seen_junk = 0;
1456 pp_incl_state.state = 0;
1457 pp_incl_state.ppp = NULL;
1458 if (is_c_h_include(newpath, 0)) pass_data=0;
1459 else pass_data=1;
1461 if(pp_status.debug)
1462 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d ,pass_data=%d\n",
1463 pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth, pass_data);
1464 pp_switch_to_buffer(pp_create_buffer(ppin, YY_BUF_SIZE));
1466 fprintf(ppout, "# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1467 }
1469 /*
1470 *-------------------------------------------------------------------------
1471 * Push/pop preprocessor ignore state when processing conditionals
1472 * which are false.
1473 *-------------------------------------------------------------------------
1474 */
1475 void pp_push_ignore_state(void)
1476 {
1477 yy_push_state(pp_ignore);
1478 }
1480 void pp_pop_ignore_state(void)
1481 {
1482 yy_pop_state();
1483 }