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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 %top{
125 #include "config.h"
126 #include "wine/port.h"
127 }
129 /*
130 * Special flex options and exclusive scanner start-conditions
131 */
132 %option stack
133 %option 8bit never-interactive
134 %option noinput nounput
135 %option prefix="ppy_"
137 %x pp_pp
138 %x pp_eol
139 %x pp_inc
140 %x pp_dqs
141 %x pp_sqs
142 %x pp_iqs
143 %x pp_comment
144 %x pp_def
145 %x pp_define
146 %x pp_macro
147 %x pp_mbody
148 %x pp_macign
149 %x pp_macscan
150 %x pp_macexp
151 %x pp_if
152 %x pp_ifd
153 %x pp_endif
154 %x pp_line
155 %x pp_defined
156 %x pp_ignore
157 %x RCINCL
159 ws [ \v\f\t\r]
160 cident [a-zA-Z_][0-9a-zA-Z_]*
161 ul [uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
163 %{
164 #include <stdio.h>
165 #include <stdlib.h>
166 #include <string.h>
167 #include <ctype.h>
168 #include <assert.h>
169 #include <errno.h>
170 #include <limits.h>
172 #ifndef LLONG_MAX
173 # define LLONG_MAX ((long long)0x7fffffff << 32 | 0xffffffff)
174 # define LLONG_MIN (-LLONG_MAX - 1)
175 #endif
176 #ifndef ULLONG_MAX
177 # define ULLONG_MAX ((long long)0xffffffff << 32 | 0xffffffff)
178 #endif
180 #ifndef HAVE_UNISTD_H
181 #define YY_NO_UNISTD_H
182 #endif
184 #include "wine/wpp.h"
185 #include "wpp_private.h"
186 #include "ppy.tab.h"
188 /*
189 * Make sure that we are running an appropriate version of flex.
190 */
191 #if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
192 #error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
193 #endif
195 #define YY_READ_BUF_SIZE 65536 /* So we read most of a file at once */
197 #define yy_current_state() YY_START
198 #define yy_pp_state(x) yy_pop_state(); yy_push_state(x)
200 /*
201 * Always update the current character position within a line
202 */
203 #define YY_USER_ACTION pp_status.char_number+=ppy_leng;
205 /*
206 * Buffer management for includes and expansions
207 */
208 #define MAXBUFFERSTACK 128 /* Nesting more than 128 includes or macro expansion textss is insane */
210 typedef struct bufferstackentry {
211 YY_BUFFER_STATE bufferstate; /* Buffer to switch back to */
212 void *filehandle; /* Handle to be used with wpp_callbacks->read */
213 pp_entry_t *define; /* Points to expanding define or NULL if handling includes */
214 int line_number; /* Line that we were handling */
215 int char_number; /* The current position on that line */
216 const char *filename; /* Filename that we were handling */
217 int if_depth; /* How many #if:s deep to check matching #endif:s */
218 int ncontinuations; /* Remember the continuation state */
219 int should_pop; /* Set if we must pop the start-state on EOF */
220 /* Include management */
221 include_state_t incl;
222 char *include_filename;
223 } bufferstackentry_t;
225 #define ALLOCBLOCKSIZE (1 << 10) /* Allocate these chunks at a time for string-buffers */
227 /*
228 * Macro expansion nesting
229 * We need the stack to handle expansions while scanning
230 * a macro's arguments. The TOS must always be the macro
231 * that receives the current expansion from the scanner.
232 */
233 #define MAXMACEXPSTACK 128 /* Nesting more than 128 macro expansions is insane */
235 typedef struct macexpstackentry {
236 pp_entry_t *ppp; /* This macro we are scanning */
237 char **args; /* With these arguments */
238 char **ppargs; /* Resulting in these preprocessed arguments */
239 int *nnls; /* Number of newlines per argument */
240 int nargs; /* And this many arguments scanned */
241 int parentheses; /* Nesting level of () */
242 int curargsize; /* Current scanning argument's size */
243 int curargalloc; /* Current scanning argument's block allocated */
244 char *curarg; /* Current scanning argument's content */
245 } macexpstackentry_t;
247 #define MACROPARENTHESES() (top_macro()->parentheses)
249 /*
250 * Prototypes
251 */
252 static void newline(int);
253 static int make_number(int radix, YYSTYPE *val, const char *str, int len);
254 static void put_buffer(const char *s, int len);
255 /* Buffer management */
256 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
257 static bufferstackentry_t *pop_buffer(void);
258 /* String functions */
259 static void new_string(void);
260 static void add_string(const char *str, int len);
261 static char *get_string(void);
262 static void put_string(void);
263 static int string_start(void);
264 /* Macro functions */
265 static void push_macro(pp_entry_t *ppp);
266 static macexpstackentry_t *top_macro(void);
267 static macexpstackentry_t *pop_macro(void);
268 static void free_macro(macexpstackentry_t *mep);
269 static void add_text_to_macro(const char *text, int len);
270 static void macro_add_arg(int last);
271 static void macro_add_expansion(void);
272 /* Expansion */
273 static void expand_special(pp_entry_t *ppp);
274 static void expand_define(pp_entry_t *ppp);
275 static void expand_macro(macexpstackentry_t *mep);
277 /*
278 * Local variables
279 */
280 static int ncontinuations;
282 static int strbuf_idx = 0;
283 static int strbuf_alloc = 0;
284 static char *strbuffer = NULL;
285 static int str_startline;
287 static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
288 static int macexpstackidx = 0;
290 static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
291 static int bufferstackidx = 0;
293 /*
294 * Global variables
295 */
296 include_state_t pp_incl_state =
297 {
298 -1, /* state */
299 NULL, /* ppp */
300 0, /* ifdepth */
301 0 /* seen_junk */
302 };
304 includelogicentry_t *pp_includelogiclist = NULL;
306 #define YY_INPUT(buf,result,max_size) \
307 { \
308 result = wpp_callbacks->read(pp_status.file, buf, max_size); \
309 }
311 #define BUFFERINITIALCAPACITY 256
313 void pp_writestring(const char *format, ...)
314 {
315 va_list valist;
316 int len;
317 static char *buffer;
318 static int buffercapacity;
319 char *new_buffer;
321 if(buffercapacity == 0)
322 {
323 buffer = pp_xmalloc(BUFFERINITIALCAPACITY);
324 if(buffer == NULL)
325 return;
326 buffercapacity = BUFFERINITIALCAPACITY;
327 }
329 va_start(valist, format);
330 len = vsnprintf(buffer, buffercapacity,
331 format, valist);
332 /* If the string is longer than buffersize, vsnprintf returns
333 * the string length with glibc >= 2.1, -1 with glibc < 2.1 */
334 while(len > buffercapacity || len < 0)
335 {
336 do
337 {
338 buffercapacity *= 2;
339 } while(len > buffercapacity);
341 new_buffer = pp_xrealloc(buffer, buffercapacity);
342 if(new_buffer == NULL)
343 {
344 va_end(valist);
345 return;
346 }
347 buffer = new_buffer;
348 len = vsnprintf(buffer, buffercapacity,
349 format, valist);
350 }
351 va_end(valist);
353 wpp_callbacks->write(buffer, len);
354 }
356 %}
358 /*
359 **************************************************************************
360 * The scanner starts here
361 **************************************************************************
362 */
364 %%
365 /*
366 * Catch line-continuations.
367 * Note: Gcc keeps the line-continuations in, for example, strings
368 * intact. However, I prefer to remove them all so that the next
369 * scanner will not need to reduce the continuation state.
370 *
371 * <*>\\\n newline(0);
372 */
374 /*
375 * Detect the leading # of a preprocessor directive.
376 */
377 <INITIAL,pp_ignore>^{ws}*# pp_incl_state.seen_junk++; yy_push_state(pp_pp);
379 /*
380 * Scan for the preprocessor directives
381 */
382 <pp_pp>{ws}*include{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
383 <pp_pp>{ws}*define{ws}* yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
384 <pp_pp>{ws}*error{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tERROR;
385 <pp_pp>{ws}*warning{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tWARNING;
386 <pp_pp>{ws}*pragma{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPRAGMA;
387 <pp_pp>{ws}*ident{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPPIDENT;
388 <pp_pp>{ws}*undef{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
389 <pp_pp>{ws}*ifdef{ws}* yy_pp_state(pp_ifd); return tIFDEF;
390 <pp_pp>{ws}*ifndef{ws}* pp_incl_state.seen_junk--; yy_pp_state(pp_ifd); return tIFNDEF;
391 <pp_pp>{ws}*if{ws}* yy_pp_state(pp_if); return tIF;
392 <pp_pp>{ws}*elif{ws}* yy_pp_state(pp_if); return tELIF;
393 <pp_pp>{ws}*else{ws}* yy_pp_state(pp_endif); return tELSE;
394 <pp_pp>{ws}*endif{ws}* yy_pp_state(pp_endif); return tENDIF;
395 <pp_pp>{ws}*line{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
396 <pp_pp>{ws}+ if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
397 <pp_pp>{ws}*[a-z]+ ppy_error("Invalid preprocessor token '%s'", ppy_text);
398 <pp_pp>\r?\n newline(1); yy_pop_state(); return tNL; /* This could be the null-token */
399 <pp_pp>\\\r?\n newline(0);
400 <pp_pp>\\\r? ppy_error("Preprocessor junk '%s'", ppy_text);
401 <pp_pp>. return *ppy_text;
403 /*
404 * Handle #include and #line
405 */
406 <pp_line>[0-9]+ return make_number(10, &ppy_lval, ppy_text, ppy_leng);
407 <pp_inc>\< new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
408 <pp_inc,pp_line>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
409 <pp_inc,pp_line>{ws}+ ;
410 <pp_inc,pp_line>\n newline(1); yy_pop_state(); return tNL;
411 <pp_inc,pp_line>\\\r?\n newline(0);
412 <pp_inc,pp_line>(\\\r?)|(.) ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
414 /*
415 * Ignore all input when a false clause is parsed
416 */
417 <pp_ignore>[^#/\\\n]+ ;
418 <pp_ignore>\n newline(1);
419 <pp_ignore>\\\r?\n newline(0);
420 <pp_ignore>(\\\r?)|(.) ;
422 /*
423 * Handle #if and #elif.
424 * These require conditionals to be evaluated, but we do not
425 * want to jam the scanner normally when we see these tokens.
426 * Note: tIDENT is handled below.
427 */
429 <pp_if>0[0-7]*{ul}? return make_number(8, &ppy_lval, ppy_text, ppy_leng);
430 <pp_if>0[0-7]*[8-9]+{ul}? ppy_error("Invalid octal digit");
431 <pp_if>[1-9][0-9]*{ul}? return make_number(10, &ppy_lval, ppy_text, ppy_leng);
432 <pp_if>0[xX][0-9a-fA-F]+{ul}? return make_number(16, &ppy_lval, ppy_text, ppy_leng);
433 <pp_if>0[xX] ppy_error("Invalid hex number");
434 <pp_if>defined yy_push_state(pp_defined); return tDEFINED;
435 <pp_if>"<<" return tLSHIFT;
436 <pp_if>">>" return tRSHIFT;
437 <pp_if>"&&" return tLOGAND;
438 <pp_if>"||" return tLOGOR;
439 <pp_if>"==" return tEQ;
440 <pp_if>"!=" return tNE;
441 <pp_if>"<=" return tLTE;
442 <pp_if>">=" return tGTE;
443 <pp_if>\n newline(1); yy_pop_state(); return tNL;
444 <pp_if>\\\r?\n newline(0);
445 <pp_if>\\\r? ppy_error("Junk in conditional expression");
446 <pp_if>{ws}+ ;
447 <pp_if>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
448 <pp_if>\" ppy_error("String constants not allowed in conditionals");
449 <pp_if>. return *ppy_text;
451 /*
452 * Handle #ifdef, #ifndef and #undef
453 * to get only an untranslated/unexpanded identifier
454 */
455 <pp_ifd>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
456 <pp_ifd>{ws}+ ;
457 <pp_ifd>\n newline(1); yy_pop_state(); return tNL;
458 <pp_ifd>\\\r?\n newline(0);
459 <pp_ifd>(\\\r?)|(.) ppy_error("Identifier expected");
461 /*
462 * Handle #else and #endif.
463 */
464 <pp_endif>{ws}+ ;
465 <pp_endif>\n newline(1); yy_pop_state(); return tNL;
466 <pp_endif>\\\r?\n newline(0);
467 <pp_endif>. ppy_error("Garbage after #else or #endif.");
469 /*
470 * Handle the special 'defined' keyword.
471 * This is necessary to get the identifier prior to any
472 * substitutions.
473 */
474 <pp_defined>{cident} yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
475 <pp_defined>{ws}+ ;
476 <pp_defined>(\()|(\)) return *ppy_text;
477 <pp_defined>\\\r?\n newline(0);
478 <pp_defined>(\\.)|(\n)|(.) ppy_error("Identifier expected");
480 /*
481 * Handle #error, #warning, #pragma and #ident.
482 * Pass everything literally to the parser, which
483 * will act appropriately.
484 * Comments are stripped from the literal text.
485 */
486 <pp_eol>[^/\\\n]+ if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
487 <pp_eol>\/[^/\\\n*]* if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
488 <pp_eol>(\\\r?)|(\/[^/*]) if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
489 <pp_eol>\n newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
490 <pp_eol>\\\r?\n newline(0);
492 /*
493 * Handle left side of #define
494 */
495 <pp_def>{cident}\( ppy_lval.cptr = pp_xstrdup(ppy_text); if(ppy_lval.cptr) ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro); return tMACRO;
496 <pp_def>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
497 <pp_def>{ws}+ ;
498 <pp_def>\\\r?\n newline(0);
499 <pp_def>(\\\r?)|(\n)|(.) perror("Identifier expected");
501 /*
502 * Scan the substitution of a define
503 */
504 <pp_define>[^'"/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
505 <pp_define>(\\\r?)|(\/[^/*]) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
506 <pp_define>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
507 <pp_define>\\\r?\n newline(0);
508 <pp_define>\n newline(1); yy_pop_state(); return tNL;
509 <pp_define>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
510 <pp_define>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
512 /*
513 * Scan the definition macro arguments
514 */
515 <pp_macro>\){ws}* yy_pp_state(pp_mbody); return tMACROEND;
516 <pp_macro>{ws}+ ;
517 <pp_macro>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
518 <pp_macro>, return ',';
519 <pp_macro>"..." return tELIPSIS;
520 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?) ppy_error("Argument identifier expected");
521 <pp_macro>\\\r?\n newline(0);
523 /*
524 * Scan the substitution of a macro
525 */
526 <pp_mbody>[^a-zA-Z0-9'"#/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
527 <pp_mbody>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
528 <pp_mbody>\#\# return tCONCAT;
529 <pp_mbody>\# return tSTRINGIZE;
530 <pp_mbody>[0-9][a-zA-Z0-9]*[^a-zA-Z0-9'"#/\\\n]* ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
531 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
532 <pp_mbody>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
533 <pp_mbody>\\\r?\n newline(0);
534 <pp_mbody>\n newline(1); yy_pop_state(); return tNL;
535 <pp_mbody>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
536 <pp_mbody>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
538 /*
539 * Macro expansion text scanning.
540 * This state is active just after the identifier is scanned
541 * that triggers an expansion. We *must* delete the leading
542 * whitespace before we can start scanning for arguments.
543 *
544 * If we do not see a '(' as next trailing token, then we have
545 * a false alarm. We just continue with a nose-bleed...
546 */
547 <pp_macign>{ws}*/\( yy_pp_state(pp_macscan);
548 <pp_macign>{ws}*\n {
549 if(yy_top_state() != pp_macscan)
550 newline(0);
551 }
552 <pp_macign>{ws}*\\\r?\n newline(0);
553 <pp_macign>{ws}+|{ws}*\\\r?|. {
554 macexpstackentry_t *mac = pop_macro();
555 yy_pop_state();
556 put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
557 put_buffer(ppy_text, ppy_leng);
558 free_macro(mac);
559 }
561 /*
562 * Macro expansion argument text scanning.
563 * This state is active when a macro's arguments are being read for expansion.
564 */
565 <pp_macscan>\( {
566 if(++MACROPARENTHESES() > 1)
567 add_text_to_macro(ppy_text, ppy_leng);
568 }
569 <pp_macscan>\) {
570 if(--MACROPARENTHESES() == 0)
571 {
572 yy_pop_state();
573 macro_add_arg(1);
574 }
575 else
576 add_text_to_macro(ppy_text, ppy_leng);
577 }
578 <pp_macscan>, {
579 if(MACROPARENTHESES() > 1)
580 add_text_to_macro(ppy_text, ppy_leng);
581 else
582 macro_add_arg(0);
583 }
584 <pp_macscan>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
585 <pp_macscan>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
586 <pp_macscan>"/*" yy_push_state(pp_comment); add_text_to_macro(" ", 1);
587 <pp_macscan>\n pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
588 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.) add_text_to_macro(ppy_text, ppy_leng);
589 <pp_macscan>\\\r?\n newline(0);
591 /*
592 * Comment handling (almost all start-conditions)
593 */
594 <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);
595 <pp_comment>[^*\n]*|"*"+[^*/\n]* ;
596 <pp_comment>\n newline(0);
597 <pp_comment>"*"+"/" yy_pop_state();
599 /*
600 * Remove C++ style comment (almost all start-conditions)
601 */
602 <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]* {
603 if(ppy_text[ppy_leng-1] == '\\')
604 ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
605 }
607 /*
608 * Single, double and <> quoted constants
609 */
610 <INITIAL,pp_macexp>\" pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
611 <INITIAL,pp_macexp>\' pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
612 <pp_dqs>[^"\\\n]+ add_string(ppy_text, ppy_leng);
613 <pp_dqs>\" {
614 add_string(ppy_text, ppy_leng);
615 yy_pop_state();
616 switch(yy_current_state())
617 {
618 case pp_pp:
619 case pp_define:
620 case pp_mbody:
621 case pp_inc:
622 case RCINCL:
623 if (yy_current_state()==RCINCL) yy_pop_state();
624 ppy_lval.cptr = get_string();
625 return tDQSTRING;
626 case pp_line:
627 ppy_lval.cptr = get_string();
628 return tDQSTRING;
629 default:
630 put_string();
631 }
632 }
633 <pp_sqs>[^'\\\n]+ add_string(ppy_text, ppy_leng);
634 <pp_sqs>\' {
635 add_string(ppy_text, ppy_leng);
636 yy_pop_state();
637 switch(yy_current_state())
638 {
639 case pp_if:
640 case pp_define:
641 case pp_mbody:
642 ppy_lval.cptr = get_string();
643 return tSQSTRING;
644 default:
645 put_string();
646 }
647 }
648 <pp_iqs>[^\>\\\n]+ add_string(ppy_text, ppy_leng);
649 <pp_iqs>\> {
650 add_string(ppy_text, ppy_leng);
651 yy_pop_state();
652 ppy_lval.cptr = get_string();
653 return tIQSTRING;
654 }
655 <pp_dqs>\\\r?\n {
656 /*
657 * This is tricky; we need to remove the line-continuation
658 * from preprocessor strings, but OTOH retain them in all
659 * other strings. This is because the resource grammar is
660 * even more braindead than initially analysed and line-
661 * continuations in strings introduce, sigh, newlines in
662 * the output. There goes the concept of non-breaking, non-
663 * spacing whitespace.
664 */
665 switch(yy_top_state())
666 {
667 case pp_pp:
668 case pp_define:
669 case pp_mbody:
670 case pp_inc:
671 case pp_line:
672 newline(0);
673 break;
674 default:
675 add_string(ppy_text, ppy_leng);
676 newline(-1);
677 }
678 }
679 <pp_iqs,pp_dqs,pp_sqs>\\. add_string(ppy_text, ppy_leng);
680 <pp_iqs,pp_dqs,pp_sqs>\n {
681 newline(1);
682 add_string(ppy_text, ppy_leng);
683 ppy_warning("Newline in string constant encounterd (started line %d)", string_start());
684 }
686 /*
687 * Identifier scanning
688 */
689 <INITIAL,pp_if,pp_inc,pp_macexp>{cident} {
690 pp_entry_t *ppp;
691 pp_incl_state.seen_junk++;
692 if(!(ppp = pplookup(ppy_text)))
693 {
694 if(yy_current_state() == pp_inc)
695 ppy_error("Expected include filename");
697 else if(yy_current_state() == pp_if)
698 {
699 ppy_lval.cptr = pp_xstrdup(ppy_text);
700 return tIDENT;
701 }
702 else {
703 if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
704 yy_push_state(RCINCL);
705 return tRCINCLUDE;
706 }
707 else put_buffer(ppy_text, ppy_leng);
708 }
709 }
710 else if(!ppp->expanding)
711 {
712 switch(ppp->type)
713 {
714 case def_special:
715 expand_special(ppp);
716 break;
717 case def_define:
718 expand_define(ppp);
719 break;
720 case def_macro:
721 yy_push_state(pp_macign);
722 push_macro(ppp);
723 break;
724 default:
725 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
726 }
727 }
728 else put_buffer(ppy_text, ppy_leng);
729 }
731 /*
732 * Everything else that needs to be passed and
733 * newline and continuation handling
734 */
735 <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);
736 <INITIAL,pp_macexp>{ws}+ put_buffer(ppy_text, ppy_leng);
737 <INITIAL>\n newline(1);
738 <INITIAL>\\\r?\n newline(0);
739 <INITIAL>\\\r? pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
741 /*
742 * Special catcher for macro argmument expansion to prevent
743 * newlines to propagate to the output or admin.
744 */
745 <pp_macexp>(\n)|(.)|(\\\r?(\n|.)) put_buffer(ppy_text, ppy_leng);
747 <RCINCL>[A-Za-z0-9_\.\\/]+ {
748 ppy_lval.cptr=pp_xstrdup(ppy_text);
749 yy_pop_state();
750 return tRCINCLUDEPATH;
751 }
753 <RCINCL>{ws}+ ;
755 <RCINCL>\" {
756 new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
757 }
759 /*
760 * This is a 'catch-all' rule to discover errors in the scanner
761 * in an orderly manner.
762 */
763 <*>. pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
765 <<EOF>> {
766 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
767 bufferstackentry_t *bep = pop_buffer();
769 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
770 ppy_warning("Unmatched #if/#endif at end of file");
772 if(!bep)
773 {
774 if(YY_START != INITIAL)
775 ppy_error("Unexpected end of file during preprocessing");
776 yyterminate();
777 }
778 else if(bep->should_pop == 2)
779 {
780 macexpstackentry_t *mac;
781 mac = pop_macro();
782 expand_macro(mac);
783 }
784 ppy__delete_buffer(b);
785 }
787 %%
788 /*
789 **************************************************************************
790 * Support functions
791 **************************************************************************
792 */
794 #ifndef ppy_wrap
795 int ppy_wrap(void)
796 {
797 return 1;
798 }
799 #endif
802 /*
803 *-------------------------------------------------------------------------
804 * Output newlines or set them as continuations
805 *
806 * Input: -1 - Don't count this one, but update local position (see pp_dqs)
807 * 0 - Line-continuation seen and cache output
808 * 1 - Newline seen and flush output
809 *-------------------------------------------------------------------------
810 */
811 static void newline(int dowrite)
812 {
813 pp_status.line_number++;
814 pp_status.char_number = 1;
816 if(dowrite == -1)
817 return;
819 ncontinuations++;
820 if(dowrite)
821 {
822 for(;ncontinuations; ncontinuations--)
823 put_buffer("\n", 1);
824 }
825 }
828 /*
829 *-------------------------------------------------------------------------
830 * Make a number out of an any-base and suffixed string
831 *
832 * Possible number extensions:
833 * - "" int
834 * - "L" long int
835 * - "LL" long long int
836 * - "U" unsigned int
837 * - "UL" unsigned long int
838 * - "ULL" unsigned long long int
839 * - "LU" unsigned long int
840 * - "LLU" unsigned long long int
841 * - "LUL" invalid
842 *
843 * FIXME:
844 * The sizes of resulting 'int' and 'long' are compiler specific.
845 * I depend on sizeof(int) > 2 here (although a relatively safe
846 * assumption).
847 * Long longs are not yet implemented because this is very compiler
848 * specific and I don't want to think too much about the problems.
849 *
850 *-------------------------------------------------------------------------
851 */
852 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
853 {
854 int is_l = 0;
855 int is_ll = 0;
856 int is_u = 0;
857 char ext[4];
858 long l;
860 ext[3] = '\0';
861 ext[2] = toupper(str[len-1]);
862 ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
863 ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
865 if(!strcmp(ext, "LUL"))
866 {
867 ppy_error("Invalid constant suffix");
868 return 0;
869 }
870 else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
871 {
872 is_ll++;
873 is_u++;
874 }
875 else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
876 {
877 is_l++;
878 is_u++;
879 }
880 else if(!strcmp(ext+1, "LL"))
881 {
882 is_ll++;
883 }
884 else if(!strcmp(ext+2, "L"))
885 {
886 is_l++;
887 }
888 else if(!strcmp(ext+2, "U"))
889 {
890 is_u++;
891 }
893 if(is_ll)
894 {
895 /* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
896 #ifdef HAVE_LONG_LONG
897 if (is_u)
898 {
899 errno = 0;
900 val->ull = strtoull(str, NULL, radix);
901 if (val->ull == ULLONG_MAX && errno == ERANGE)
902 ppy_error("integer constant %s is too large\n", str);
903 return tULONGLONG;
904 }
905 else
906 {
907 errno = 0;
908 val->sll = strtoll(str, NULL, radix);
909 if ((val->sll == LLONG_MIN || val->sll == LLONG_MAX) && errno == ERANGE)
910 ppy_error("integer constant %s is too large\n", str);
911 return tSLONGLONG;
912 }
913 #else
914 pp_internal_error(__FILE__, __LINE__, "long long constants not supported on this platform");
915 #endif
916 }
917 else if(is_u && is_l)
918 {
919 errno = 0;
920 val->ulong = strtoul(str, NULL, radix);
921 if (val->ulong == ULONG_MAX && errno == ERANGE)
922 ppy_error("integer constant %s is too large\n", str);
923 return tULONG;
924 }
925 else if(!is_u && is_l)
926 {
927 errno = 0;
928 val->slong = strtol(str, NULL, radix);
929 if ((val->slong == LONG_MIN || val->slong == LONG_MAX) && errno == ERANGE)
930 ppy_error("integer constant %s is too large\n", str);
931 return tSLONG;
932 }
933 else if(is_u && !is_l)
934 {
935 unsigned long ul;
936 errno = 0;
937 ul = strtoul(str, NULL, radix);
938 if ((ul == ULONG_MAX && errno == ERANGE) || (ul > UINT_MAX))
939 ppy_error("integer constant %s is too large\n", str);
940 val->uint = (unsigned int)ul;
941 return tUINT;
942 }
944 /* Else it must be an int... */
945 errno = 0;
946 l = strtol(str, NULL, radix);
947 if (((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE) ||
948 (l > INT_MAX) || (l < INT_MIN))
949 ppy_error("integer constant %s is too large\n", str);
950 val->sint = (int)l;
951 return tSINT;
952 }
955 /*
956 *-------------------------------------------------------------------------
957 * Macro and define expansion support
958 *
959 * FIXME: Variable macro arguments.
960 *-------------------------------------------------------------------------
961 */
962 static void expand_special(pp_entry_t *ppp)
963 {
964 static char *buf = NULL;
965 char *new_buf;
967 assert(ppp->type == def_special);
969 if(!strcmp(ppp->ident, "__LINE__"))
970 {
971 new_buf = pp_xrealloc(buf, 32);
972 if(!new_buf)
973 return;
974 buf = new_buf;
975 sprintf(buf, "%d", pp_status.line_number);
976 }
977 else if(!strcmp(ppp->ident, "__FILE__"))
978 {
979 new_buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
980 if(!new_buf)
981 return;
982 buf = new_buf;
983 sprintf(buf, "\"%s\"", pp_status.input);
984 }
985 else
986 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
988 if(pp_flex_debug)
989 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
990 macexpstackidx,
991 pp_status.input,
992 pp_status.line_number,
993 ppp->ident,
994 buf ? buf : "");
996 if(buf && buf[0])
997 {
998 push_buffer(ppp, NULL, NULL, 0);
999 yy_scan_string(buf);
1000 }
1001 }
1003 static void expand_define(pp_entry_t *ppp)
1004 {
1005 assert(ppp->type == def_define);
1007 if(pp_flex_debug)
1008 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
1009 macexpstackidx,
1010 pp_status.input,
1011 pp_status.line_number,
1012 ppp->ident,
1013 ppp->subst.text);
1014 if(ppp->subst.text && ppp->subst.text[0])
1015 {
1016 push_buffer(ppp, NULL, NULL, 0);
1017 yy_scan_string(ppp->subst.text);
1018 }
1019 }
1021 static int curdef_idx = 0;
1022 static int curdef_alloc = 0;
1023 static char *curdef_text = NULL;
1025 static void add_text(const char *str, int len)
1026 {
1027 int new_alloc;
1028 char *new_text;
1030 if(len == 0)
1031 return;
1032 if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
1033 {
1034 new_alloc = curdef_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1035 new_text = pp_xrealloc(curdef_text, new_alloc * sizeof(curdef_text[0]));
1036 if(!new_text)
1037 return;
1038 curdef_text = new_text;
1039 curdef_alloc = new_alloc;
1040 if(curdef_alloc > 65536)
1041 ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
1042 }
1043 memcpy(&curdef_text[curdef_idx], str, len);
1044 curdef_idx += len;
1045 }
1047 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
1048 {
1049 char *cptr;
1050 char *exp;
1051 int tag;
1052 int n;
1054 if(mtp == NULL)
1055 return NULL;
1057 switch(mtp->type)
1058 {
1059 case exp_text:
1060 if(pp_flex_debug)
1061 fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
1062 add_text(mtp->subst.text, strlen(mtp->subst.text));
1063 break;
1065 case exp_stringize:
1066 if(pp_flex_debug)
1067 fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
1068 mtp->subst.argidx,
1069 mep->args[mtp->subst.argidx]);
1070 cptr = mep->args[mtp->subst.argidx];
1071 add_text("\"", 1);
1072 while(*cptr)
1073 {
1074 if(*cptr == '"' || *cptr == '\\')
1075 add_text("\\", 1);
1076 add_text(cptr, 1);
1077 cptr++;
1078 }
1079 add_text("\"", 1);
1080 break;
1082 case exp_concat:
1083 if(pp_flex_debug)
1084 fprintf(stderr, "add_expand_text: exp_concat\n");
1085 /* Remove trailing whitespace from current expansion text */
1086 while(curdef_idx)
1087 {
1088 if(isspace(curdef_text[curdef_idx-1] & 0xff))
1089 curdef_idx--;
1090 else
1091 break;
1092 }
1093 /* tag current position and recursively expand the next part */
1094 tag = curdef_idx;
1095 mtp = add_expand_text(mtp->next, mep, nnl);
1097 /* Now get rid of the leading space of the expansion */
1098 cptr = &curdef_text[tag];
1099 n = curdef_idx - tag;
1100 while(n)
1101 {
1102 if(isspace(*cptr & 0xff))
1103 {
1104 cptr++;
1105 n--;
1106 }
1107 else
1108 break;
1109 }
1110 if(cptr != &curdef_text[tag])
1111 {
1112 memmove(&curdef_text[tag], cptr, n);
1113 curdef_idx -= (curdef_idx - tag) - n;
1114 }
1115 break;
1117 case exp_subst:
1118 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1119 exp = mep->args[mtp->subst.argidx];
1120 else
1121 exp = mep->ppargs[mtp->subst.argidx];
1122 if(exp)
1123 {
1124 add_text(exp, strlen(exp));
1125 *nnl -= mep->nnls[mtp->subst.argidx];
1126 cptr = strchr(exp, '\n');
1127 while(cptr)
1128 {
1129 *cptr = ' ';
1130 cptr = strchr(cptr+1, '\n');
1131 }
1132 mep->nnls[mtp->subst.argidx] = 0;
1133 }
1134 if(pp_flex_debug)
1135 fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1136 break;
1138 default:
1139 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1140 }
1141 return mtp;
1142 }
1144 static void expand_macro(macexpstackentry_t *mep)
1145 {
1146 mtext_t *mtp;
1147 int n, k;
1148 char *cptr;
1149 int nnl = 0;
1150 pp_entry_t *ppp = mep->ppp;
1151 int nargs = mep->nargs;
1153 assert(ppp->type == def_macro);
1154 assert(ppp->expanding == 0);
1156 if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1157 {
1158 ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1159 return;
1160 }
1162 for(n = 0; n < nargs; n++)
1163 nnl += mep->nnls[n];
1165 if(pp_flex_debug)
1166 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1167 macexpstackidx,
1168 pp_status.input,
1169 pp_status.line_number,
1170 ppp->ident,
1171 mep->nargs,
1172 nnl);
1174 curdef_idx = 0;
1176 for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1177 {
1178 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1179 break;
1180 }
1182 for(n = 0; n < nnl; n++)
1183 add_text("\n", 1);
1185 /* To make sure there is room and termination (see below) */
1186 add_text(" \0", 2);
1188 /* Strip trailing whitespace from expansion */
1189 for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1190 {
1191 if(!isspace(*cptr & 0xff))
1192 break;
1193 }
1195 /*
1196 * We must add *one* whitespace to make sure that there
1197 * is a token-separation after the expansion.
1198 */
1199 *(++cptr) = ' ';
1200 *(++cptr) = '\0';
1201 k++;
1203 /* Strip leading whitespace from expansion */
1204 for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1205 {
1206 if(!isspace(*cptr & 0xff))
1207 break;
1208 }
1210 if(k - n > 0)
1211 {
1212 if(pp_flex_debug)
1213 fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1214 push_buffer(ppp, NULL, NULL, 0);
1215 /*yy_scan_bytes(curdef_text + n, k - n);*/
1216 yy_scan_string(curdef_text + n);
1217 }
1218 }
1220 /*
1221 *-------------------------------------------------------------------------
1222 * String collection routines
1223 *-------------------------------------------------------------------------
1224 */
1225 static void new_string(void)
1226 {
1227 #ifdef DEBUG
1228 if(strbuf_idx)
1229 ppy_warning("new_string: strbuf_idx != 0");
1230 #endif
1231 strbuf_idx = 0;
1232 str_startline = pp_status.line_number;
1233 }
1235 static void add_string(const char *str, int len)
1236 {
1237 int new_alloc;
1238 char *new_buffer;
1240 if(len == 0)
1241 return;
1242 if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1243 {
1244 new_alloc = strbuf_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1245 new_buffer = pp_xrealloc(strbuffer, new_alloc * sizeof(strbuffer[0]));
1246 if(!new_buffer)
1247 return;
1248 strbuffer = new_buffer;
1249 strbuf_alloc = new_alloc;
1250 if(strbuf_alloc > 65536)
1251 ppy_warning("Reallocating string buffer larger than 64kB");
1252 }
1253 memcpy(&strbuffer[strbuf_idx], str, len);
1254 strbuf_idx += len;
1255 }
1257 static char *get_string(void)
1258 {
1259 char *str = pp_xmalloc(strbuf_idx + 1);
1260 if(!str)
1261 return NULL;
1262 memcpy(str, strbuffer, strbuf_idx);
1263 str[strbuf_idx] = '\0';
1264 #ifdef DEBUG
1265 strbuf_idx = 0;
1266 #endif
1267 return str;
1268 }
1270 static void put_string(void)
1271 {
1272 put_buffer(strbuffer, strbuf_idx);
1273 #ifdef DEBUG
1274 strbuf_idx = 0;
1275 #endif
1276 }
1278 static int string_start(void)
1279 {
1280 return str_startline;
1281 }
1284 /*
1285 *-------------------------------------------------------------------------
1286 * Buffer management
1287 *-------------------------------------------------------------------------
1288 */
1289 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1290 {
1291 if(ppy_debug)
1292 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1293 if(bufferstackidx >= MAXBUFFERSTACK)
1294 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1296 memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1297 bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1298 bufferstack[bufferstackidx].filehandle = pp_status.file;
1299 bufferstack[bufferstackidx].define = ppp;
1300 bufferstack[bufferstackidx].line_number = pp_status.line_number;
1301 bufferstack[bufferstackidx].char_number = pp_status.char_number;
1302 bufferstack[bufferstackidx].if_depth = pp_get_if_depth();
1303 bufferstack[bufferstackidx].should_pop = pop;
1304 bufferstack[bufferstackidx].filename = pp_status.input;
1305 bufferstack[bufferstackidx].ncontinuations = ncontinuations;
1306 bufferstack[bufferstackidx].incl = pp_incl_state;
1307 bufferstack[bufferstackidx].include_filename = incname;
1309 if(ppp)
1310 ppp->expanding = 1;
1311 else if(filename)
1312 {
1313 /* These will track the ppy_error to the correct file and line */
1314 pp_status.line_number = 1;
1315 pp_status.char_number = 1;
1316 pp_status.input = filename;
1317 ncontinuations = 0;
1318 }
1319 else if(!pop)
1320 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1321 bufferstackidx++;
1322 }
1324 static bufferstackentry_t *pop_buffer(void)
1325 {
1326 if(bufferstackidx < 0)
1327 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1329 if(bufferstackidx == 0)
1330 return NULL;
1332 bufferstackidx--;
1334 if(bufferstack[bufferstackidx].define)
1335 bufferstack[bufferstackidx].define->expanding = 0;
1336 else
1337 {
1338 if(!bufferstack[bufferstackidx].should_pop)
1339 {
1340 wpp_callbacks->close(pp_status.file);
1341 pp_writestring("# %d \"%s\" 2\n", bufferstack[bufferstackidx].line_number, bufferstack[bufferstackidx].filename);
1343 /* We have EOF, check the include logic */
1344 if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1345 {
1346 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1347 if(ppp)
1348 {
1349 includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1350 if(!iep)
1351 return NULL;
1353 iep->ppp = ppp;
1354 ppp->iep = iep;
1355 iep->filename = bufferstack[bufferstackidx].include_filename;
1356 iep->prev = NULL;
1357 iep->next = pp_includelogiclist;
1358 if(iep->next)
1359 iep->next->prev = iep;
1360 pp_includelogiclist = iep;
1361 if(pp_status.debug)
1362 fprintf(stderr, "pop_buffer: %s:%d: includelogic added, include_ppp='%s', file='%s'\n", bufferstack[bufferstackidx].filename, bufferstack[bufferstackidx].line_number, pp_incl_state.ppp, iep->filename);
1363 }
1364 else
1365 free(bufferstack[bufferstackidx].include_filename);
1366 }
1367 free(pp_incl_state.ppp);
1368 pp_incl_state = bufferstack[bufferstackidx].incl;
1370 }
1371 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1372 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1373 pp_status.input = bufferstack[bufferstackidx].filename;
1374 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1375 }
1377 if(ppy_debug)
1378 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1379 bufferstackidx,
1380 bufferstack[bufferstackidx].bufferstate,
1381 bufferstack[bufferstackidx].define,
1382 bufferstack[bufferstackidx].line_number,
1383 bufferstack[bufferstackidx].char_number,
1384 bufferstack[bufferstackidx].if_depth,
1385 bufferstack[bufferstackidx].filename,
1386 bufferstack[bufferstackidx].should_pop);
1388 pp_status.file = bufferstack[bufferstackidx].filehandle;
1389 ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1391 if(bufferstack[bufferstackidx].should_pop)
1392 {
1393 if(yy_current_state() == pp_macexp)
1394 macro_add_expansion();
1395 else
1396 pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1397 yy_pop_state();
1398 }
1400 return &bufferstack[bufferstackidx];
1401 }
1404 /*
1405 *-------------------------------------------------------------------------
1406 * Macro nestng support
1407 *-------------------------------------------------------------------------
1408 */
1409 static void push_macro(pp_entry_t *ppp)
1410 {
1411 if(macexpstackidx >= MAXMACEXPSTACK)
1412 {
1413 ppy_error("Too many nested macros");
1414 return;
1415 }
1417 macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1418 if(!macexpstack[macexpstackidx])
1419 return;
1420 memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1421 macexpstack[macexpstackidx]->ppp = ppp;
1422 macexpstackidx++;
1423 }
1425 static macexpstackentry_t *top_macro(void)
1426 {
1427 return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1428 }
1430 static macexpstackentry_t *pop_macro(void)
1431 {
1432 if(macexpstackidx <= 0)
1433 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1434 return macexpstack[--macexpstackidx];
1435 }
1437 static void free_macro(macexpstackentry_t *mep)
1438 {
1439 int i;
1441 for(i = 0; i < mep->nargs; i++)
1442 free(mep->args[i]);
1443 free(mep->args);
1444 free(mep->nnls);
1445 free(mep->curarg);
1446 free(mep);
1447 }
1449 static void add_text_to_macro(const char *text, int len)
1450 {
1451 macexpstackentry_t *mep = top_macro();
1453 assert(mep->ppp->expanding == 0);
1455 if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1456 {
1457 char *new_curarg;
1458 int new_alloc = mep->curargalloc + ((ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1);
1459 new_curarg = pp_xrealloc(mep->curarg, new_alloc * sizeof(mep->curarg[0]));
1460 if(!new_curarg)
1461 return;
1462 mep->curarg = new_curarg;
1463 mep->curargalloc = new_alloc;
1464 }
1465 memcpy(mep->curarg + mep->curargsize, text, len);
1466 mep->curargsize += len;
1467 mep->curarg[mep->curargsize] = '\0';
1468 }
1470 static void macro_add_arg(int last)
1471 {
1472 int nnl = 0;
1473 char *cptr;
1474 char **new_args, **new_ppargs;
1475 int *new_nnls;
1476 macexpstackentry_t *mep = top_macro();
1478 assert(mep->ppp->expanding == 0);
1480 new_args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1481 if(!new_args)
1482 return;
1483 mep->args = new_args;
1485 new_ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1486 if(!new_ppargs)
1487 return;
1488 mep->ppargs = new_ppargs;
1490 new_nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1491 if(!new_nnls)
1492 return;
1493 mep->nnls = new_nnls;
1495 mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1496 if(!mep->args[mep->nargs])
1497 return;
1498 cptr = mep->args[mep->nargs]-1;
1499 while((cptr = strchr(cptr+1, '\n')))
1500 {
1501 nnl++;
1502 }
1503 mep->nnls[mep->nargs] = nnl;
1504 mep->nargs++;
1505 free(mep->curarg);
1506 mep->curargalloc = mep->curargsize = 0;
1507 mep->curarg = NULL;
1509 if(pp_flex_debug)
1510 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1511 pp_status.input,
1512 pp_status.line_number,
1513 mep->nargs-1,
1514 mep->args[mep->nargs-1]);
1516 /* Each macro argument must be expanded to cope with stingize */
1517 if(last || mep->args[mep->nargs-1][0])
1518 {
1519 yy_push_state(pp_macexp);
1520 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1521 yy_scan_string(mep->args[mep->nargs-1]);
1522 /*mep->bufferstackidx = bufferstackidx; But not nested! */
1523 }
1524 }
1526 static void macro_add_expansion(void)
1527 {
1528 macexpstackentry_t *mep = top_macro();
1530 assert(mep->ppp->expanding == 0);
1532 mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1533 free(mep->curarg);
1534 mep->curargalloc = mep->curargsize = 0;
1535 mep->curarg = NULL;
1537 if(pp_flex_debug)
1538 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1539 pp_status.input,
1540 pp_status.line_number,
1541 mep->nargs-1,
1542 mep->ppargs[mep->nargs-1] ? mep->ppargs[mep->nargs-1] : "");
1543 }
1546 /*
1547 *-------------------------------------------------------------------------
1548 * Output management
1549 *-------------------------------------------------------------------------
1550 */
1551 static void put_buffer(const char *s, int len)
1552 {
1553 if(top_macro())
1554 add_text_to_macro(s, len);
1555 else
1556 wpp_callbacks->write(s, len);
1557 }
1560 /*
1561 *-------------------------------------------------------------------------
1562 * Include management
1563 *-------------------------------------------------------------------------
1564 */
1565 void pp_do_include(char *fname, int type)
1566 {
1567 char *newpath;
1568 int n;
1569 includelogicentry_t *iep;
1570 void *fp;
1572 if(!fname)
1573 return;
1575 for(iep = pp_includelogiclist; iep; iep = iep->next)
1576 {
1577 if(!strcmp(iep->filename, fname))
1578 {
1579 /*
1580 * We are done. The file was included before.
1581 * If the define was deleted, then this entry would have
1582 * been deleted too.
1583 */
1584 return;
1585 }
1586 }
1588 n = strlen(fname);
1590 if(n <= 2)
1591 {
1592 ppy_error("Empty include filename");
1593 return;
1594 }
1596 /* Undo the effect of the quotation */
1597 fname[n-1] = '\0';
1599 if((fp = pp_open_include(fname+1, type ? pp_status.input : NULL, &newpath)) == NULL)
1600 {
1601 ppy_error("Unable to open include file %s", fname+1);
1602 return;
1603 }
1605 fname[n-1] = *fname; /* Redo the quotes */
1606 push_buffer(NULL, newpath, fname, 0);
1607 pp_incl_state.seen_junk = 0;
1608 pp_incl_state.state = 0;
1609 pp_incl_state.ppp = NULL;
1611 if(pp_status.debug)
1612 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
1613 pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
1614 pp_status.file = fp;
1615 ppy__switch_to_buffer(ppy__create_buffer(NULL, YY_BUF_SIZE));
1617 pp_writestring("# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1618 }
1620 /*
1621 *-------------------------------------------------------------------------
1622 * Push/pop preprocessor ignore state when processing conditionals
1623 * which are false.
1624 *-------------------------------------------------------------------------
1625 */
1626 void pp_push_ignore_state(void)
1627 {
1628 yy_push_state(pp_ignore);
1629 }
1631 void pp_pop_ignore_state(void)
1632 {
1633 yy_pop_state();
1634 }