| blob | 70bd213122b70decc71503a1314b3cfaa6cc2adc |
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 va_end(valist);
333 /* If the string is longer than buffersize, vsnprintf returns
334 * the string length with glibc >= 2.1, -1 with glibc < 2.1 */
335 while(len > buffercapacity || len < 0)
336 {
337 do
338 {
339 buffercapacity *= 2;
340 } while(len > buffercapacity);
342 new_buffer = pp_xrealloc(buffer, buffercapacity);
343 if(new_buffer == NULL)
344 {
345 va_end(valist);
346 return;
347 }
348 buffer = new_buffer;
349 va_start(valist, format);
350 len = vsnprintf(buffer, buffercapacity,
351 format, valist);
352 va_end(valist);
353 }
355 wpp_callbacks->write(buffer, len);
356 }
358 %}
360 /*
361 **************************************************************************
362 * The scanner starts here
363 **************************************************************************
364 */
366 %%
367 /*
368 * Catch line-continuations.
369 * Note: Gcc keeps the line-continuations in, for example, strings
370 * intact. However, I prefer to remove them all so that the next
371 * scanner will not need to reduce the continuation state.
372 *
373 * <*>\\\n newline(0);
374 */
376 /*
377 * Detect the leading # of a preprocessor directive.
378 */
379 <INITIAL,pp_ignore>^{ws}*# pp_incl_state.seen_junk++; yy_push_state(pp_pp);
381 /*
382 * Scan for the preprocessor directives
383 */
384 <pp_pp>{ws}*include{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
385 <pp_pp>{ws}*define{ws}* yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
386 <pp_pp>{ws}*error{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tERROR;
387 <pp_pp>{ws}*warning{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tWARNING;
388 <pp_pp>{ws}*pragma{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPRAGMA;
389 <pp_pp>{ws}*ident{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPPIDENT;
390 <pp_pp>{ws}*undef{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
391 <pp_pp>{ws}*ifdef{ws}* yy_pp_state(pp_ifd); return tIFDEF;
392 <pp_pp>{ws}*ifndef{ws}* pp_incl_state.seen_junk--; yy_pp_state(pp_ifd); return tIFNDEF;
393 <pp_pp>{ws}*if{ws}* yy_pp_state(pp_if); return tIF;
394 <pp_pp>{ws}*elif{ws}* yy_pp_state(pp_if); return tELIF;
395 <pp_pp>{ws}*else{ws}* yy_pp_state(pp_endif); return tELSE;
396 <pp_pp>{ws}*endif{ws}* yy_pp_state(pp_endif); return tENDIF;
397 <pp_pp>{ws}*line{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
398 <pp_pp>{ws}+ if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
399 <pp_pp>{ws}*[a-z]+ ppy_error("Invalid preprocessor token '%s'", ppy_text);
400 <pp_pp>\r?\n newline(1); yy_pop_state(); return tNL; /* This could be the null-token */
401 <pp_pp>\\\r?\n newline(0);
402 <pp_pp>\\\r? ppy_error("Preprocessor junk '%s'", ppy_text);
403 <pp_pp>. return *ppy_text;
405 /*
406 * Handle #include and #line
407 */
408 <pp_line>[0-9]+ return make_number(10, &ppy_lval, ppy_text, ppy_leng);
409 <pp_inc>\< new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
410 <pp_inc,pp_line>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
411 <pp_inc,pp_line>{ws}+ ;
412 <pp_inc,pp_line>\n newline(1); yy_pop_state(); return tNL;
413 <pp_inc,pp_line>\\\r?\n newline(0);
414 <pp_inc,pp_line>(\\\r?)|(.) ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
416 /*
417 * Ignore all input when a false clause is parsed
418 */
419 <pp_ignore>[^#/\\\n]+ ;
420 <pp_ignore>\n newline(1);
421 <pp_ignore>\\\r?\n newline(0);
422 <pp_ignore>(\\\r?)|(.) ;
424 /*
425 * Handle #if and #elif.
426 * These require conditionals to be evaluated, but we do not
427 * want to jam the scanner normally when we see these tokens.
428 * Note: tIDENT is handled below.
429 */
431 <pp_if>0[0-7]*{ul}? return make_number(8, &ppy_lval, ppy_text, ppy_leng);
432 <pp_if>0[0-7]*[8-9]+{ul}? ppy_error("Invalid octal digit");
433 <pp_if>[1-9][0-9]*{ul}? return make_number(10, &ppy_lval, ppy_text, ppy_leng);
434 <pp_if>0[xX][0-9a-fA-F]+{ul}? return make_number(16, &ppy_lval, ppy_text, ppy_leng);
435 <pp_if>0[xX] ppy_error("Invalid hex number");
436 <pp_if>defined yy_push_state(pp_defined); return tDEFINED;
437 <pp_if>"<<" return tLSHIFT;
438 <pp_if>">>" return tRSHIFT;
439 <pp_if>"&&" return tLOGAND;
440 <pp_if>"||" return tLOGOR;
441 <pp_if>"==" return tEQ;
442 <pp_if>"!=" return tNE;
443 <pp_if>"<=" return tLTE;
444 <pp_if>">=" return tGTE;
445 <pp_if>\n newline(1); yy_pop_state(); return tNL;
446 <pp_if>\\\r?\n newline(0);
447 <pp_if>\\\r? ppy_error("Junk in conditional expression");
448 <pp_if>{ws}+ ;
449 <pp_if>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
450 <pp_if>\" ppy_error("String constants not allowed in conditionals");
451 <pp_if>. return *ppy_text;
453 /*
454 * Handle #ifdef, #ifndef and #undef
455 * to get only an untranslated/unexpanded identifier
456 */
457 <pp_ifd>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
458 <pp_ifd>{ws}+ ;
459 <pp_ifd>\n newline(1); yy_pop_state(); return tNL;
460 <pp_ifd>\\\r?\n newline(0);
461 <pp_ifd>(\\\r?)|(.) ppy_error("Identifier expected");
463 /*
464 * Handle #else and #endif.
465 */
466 <pp_endif>{ws}+ ;
467 <pp_endif>\n newline(1); yy_pop_state(); return tNL;
468 <pp_endif>\\\r?\n newline(0);
469 <pp_endif>. ppy_error("Garbage after #else or #endif.");
471 /*
472 * Handle the special 'defined' keyword.
473 * This is necessary to get the identifier prior to any
474 * substitutions.
475 */
476 <pp_defined>{cident} yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
477 <pp_defined>{ws}+ ;
478 <pp_defined>(\()|(\)) return *ppy_text;
479 <pp_defined>\\\r?\n newline(0);
480 <pp_defined>(\\.)|(\n)|(.) ppy_error("Identifier expected");
482 /*
483 * Handle #error, #warning, #pragma and #ident.
484 * Pass everything literally to the parser, which
485 * will act appropriately.
486 * Comments are stripped from the literal text.
487 */
488 <pp_eol>[^/\\\n]+ if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
489 <pp_eol>\/[^/\\\n*]* if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
490 <pp_eol>(\\\r?)|(\/[^/*]) if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
491 <pp_eol>\n newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
492 <pp_eol>\\\r?\n newline(0);
494 /*
495 * Handle left side of #define
496 */
497 <pp_def>{cident}\( ppy_lval.cptr = pp_xstrdup(ppy_text); if(ppy_lval.cptr) ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro); return tMACRO;
498 <pp_def>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
499 <pp_def>{ws}+ ;
500 <pp_def>\\\r?\n newline(0);
501 <pp_def>(\\\r?)|(\n)|(.) perror("Identifier expected");
503 /*
504 * Scan the substitution of a define
505 */
506 <pp_define>[^'"/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
507 <pp_define>(\\\r?)|(\/[^/*]) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
508 <pp_define>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
509 <pp_define>\\\r?\n newline(0);
510 <pp_define>\n newline(1); yy_pop_state(); return tNL;
511 <pp_define>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
512 <pp_define>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
514 /*
515 * Scan the definition macro arguments
516 */
517 <pp_macro>\){ws}* yy_pp_state(pp_mbody); return tMACROEND;
518 <pp_macro>{ws}+ ;
519 <pp_macro>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
520 <pp_macro>, return ',';
521 <pp_macro>"..." return tELIPSIS;
522 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?) ppy_error("Argument identifier expected");
523 <pp_macro>\\\r?\n newline(0);
525 /*
526 * Scan the substitution of a macro
527 */
528 <pp_mbody>[^a-zA-Z0-9'"#/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
529 <pp_mbody>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
530 <pp_mbody>\#\# return tCONCAT;
531 <pp_mbody>\# return tSTRINGIZE;
532 <pp_mbody>[0-9][a-zA-Z0-9]*[^a-zA-Z0-9'"#/\\\n]* ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
533 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
534 <pp_mbody>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
535 <pp_mbody>\\\r?\n newline(0);
536 <pp_mbody>\n newline(1); yy_pop_state(); return tNL;
537 <pp_mbody>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
538 <pp_mbody>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
540 /*
541 * Macro expansion text scanning.
542 * This state is active just after the identifier is scanned
543 * that triggers an expansion. We *must* delete the leading
544 * whitespace before we can start scanning for arguments.
545 *
546 * If we do not see a '(' as next trailing token, then we have
547 * a false alarm. We just continue with a nose-bleed...
548 */
549 <pp_macign>{ws}*/\( yy_pp_state(pp_macscan);
550 <pp_macign>{ws}*\n {
551 if(yy_top_state() != pp_macscan)
552 newline(0);
553 }
554 <pp_macign>{ws}*\\\r?\n newline(0);
555 <pp_macign>{ws}+|{ws}*\\\r?|. {
556 macexpstackentry_t *mac = pop_macro();
557 yy_pop_state();
558 put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
559 put_buffer(ppy_text, ppy_leng);
560 free_macro(mac);
561 }
563 /*
564 * Macro expansion argument text scanning.
565 * This state is active when a macro's arguments are being read for expansion.
566 */
567 <pp_macscan>\( {
568 if(++MACROPARENTHESES() > 1)
569 add_text_to_macro(ppy_text, ppy_leng);
570 }
571 <pp_macscan>\) {
572 if(--MACROPARENTHESES() == 0)
573 {
574 yy_pop_state();
575 macro_add_arg(1);
576 }
577 else
578 add_text_to_macro(ppy_text, ppy_leng);
579 }
580 <pp_macscan>, {
581 if(MACROPARENTHESES() > 1)
582 add_text_to_macro(ppy_text, ppy_leng);
583 else
584 macro_add_arg(0);
585 }
586 <pp_macscan>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
587 <pp_macscan>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
588 <pp_macscan>"/*" yy_push_state(pp_comment); add_text_to_macro(" ", 1);
589 <pp_macscan>\n pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
590 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.) add_text_to_macro(ppy_text, ppy_leng);
591 <pp_macscan>\\\r?\n newline(0);
593 /*
594 * Comment handling (almost all start-conditions)
595 */
596 <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);
597 <pp_comment>[^*\n]*|"*"+[^*/\n]* ;
598 <pp_comment>\n newline(0);
599 <pp_comment>"*"+"/" yy_pop_state();
601 /*
602 * Remove C++ style comment (almost all start-conditions)
603 */
604 <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]* {
605 if(ppy_text[ppy_leng-1] == '\\')
606 ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
607 }
609 /*
610 * Single, double and <> quoted constants
611 */
612 <INITIAL,pp_macexp>\" pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
613 <INITIAL,pp_macexp>\' pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
614 <pp_dqs>[^"\\\n]+ add_string(ppy_text, ppy_leng);
615 <pp_dqs>\" {
616 add_string(ppy_text, ppy_leng);
617 yy_pop_state();
618 switch(yy_current_state())
619 {
620 case pp_pp:
621 case pp_define:
622 case pp_mbody:
623 case pp_inc:
624 case RCINCL:
625 if (yy_current_state()==RCINCL) yy_pop_state();
626 ppy_lval.cptr = get_string();
627 return tDQSTRING;
628 case pp_line:
629 ppy_lval.cptr = get_string();
630 return tDQSTRING;
631 default:
632 put_string();
633 }
634 }
635 <pp_sqs>[^'\\\n]+ add_string(ppy_text, ppy_leng);
636 <pp_sqs>\' {
637 add_string(ppy_text, ppy_leng);
638 yy_pop_state();
639 switch(yy_current_state())
640 {
641 case pp_if:
642 case pp_define:
643 case pp_mbody:
644 ppy_lval.cptr = get_string();
645 return tSQSTRING;
646 default:
647 put_string();
648 }
649 }
650 <pp_iqs>[^\>\\\n]+ add_string(ppy_text, ppy_leng);
651 <pp_iqs>\> {
652 add_string(ppy_text, ppy_leng);
653 yy_pop_state();
654 ppy_lval.cptr = get_string();
655 return tIQSTRING;
656 }
657 <pp_dqs>\\\r?\n {
658 /*
659 * This is tricky; we need to remove the line-continuation
660 * from preprocessor strings, but OTOH retain them in all
661 * other strings. This is because the resource grammar is
662 * even more braindead than initially analysed and line-
663 * continuations in strings introduce, sigh, newlines in
664 * the output. There goes the concept of non-breaking, non-
665 * spacing whitespace.
666 */
667 switch(yy_top_state())
668 {
669 case pp_pp:
670 case pp_define:
671 case pp_mbody:
672 case pp_inc:
673 case pp_line:
674 newline(0);
675 break;
676 default:
677 add_string(ppy_text, ppy_leng);
678 newline(-1);
679 }
680 }
681 <pp_iqs,pp_dqs,pp_sqs>\\. add_string(ppy_text, ppy_leng);
682 <pp_iqs,pp_dqs,pp_sqs>\n {
683 newline(1);
684 add_string(ppy_text, ppy_leng);
685 ppy_warning("Newline in string constant encountered (started line %d)", string_start());
686 }
688 /*
689 * Identifier scanning
690 */
691 <INITIAL,pp_if,pp_inc,pp_macexp>{cident} {
692 pp_entry_t *ppp;
693 pp_incl_state.seen_junk++;
694 if(!(ppp = pplookup(ppy_text)))
695 {
696 if(yy_current_state() == pp_inc)
697 ppy_error("Expected include filename");
699 else if(yy_current_state() == pp_if)
700 {
701 ppy_lval.cptr = pp_xstrdup(ppy_text);
702 return tIDENT;
703 }
704 else {
705 if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
706 yy_push_state(RCINCL);
707 return tRCINCLUDE;
708 }
709 else put_buffer(ppy_text, ppy_leng);
710 }
711 }
712 else if(!ppp->expanding)
713 {
714 switch(ppp->type)
715 {
716 case def_special:
717 expand_special(ppp);
718 break;
719 case def_define:
720 expand_define(ppp);
721 break;
722 case def_macro:
723 yy_push_state(pp_macign);
724 push_macro(ppp);
725 break;
726 default:
727 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
728 }
729 }
730 else put_buffer(ppy_text, ppy_leng);
731 }
733 /*
734 * Everything else that needs to be passed and
735 * newline and continuation handling
736 */
737 <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);
738 <INITIAL,pp_macexp>{ws}+ put_buffer(ppy_text, ppy_leng);
739 <INITIAL>\n newline(1);
740 <INITIAL>\\\r?\n newline(0);
741 <INITIAL>\\\r? pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
743 /*
744 * Special catcher for macro argmument expansion to prevent
745 * newlines to propagate to the output or admin.
746 */
747 <pp_macexp>(\n)|(.)|(\\\r?(\n|.)) put_buffer(ppy_text, ppy_leng);
749 <RCINCL>[A-Za-z0-9_\.\\/]+ {
750 ppy_lval.cptr=pp_xstrdup(ppy_text);
751 yy_pop_state();
752 return tRCINCLUDEPATH;
753 }
755 <RCINCL>{ws}+ ;
757 <RCINCL>\" {
758 new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
759 }
761 /*
762 * This is a 'catch-all' rule to discover errors in the scanner
763 * in an orderly manner.
764 */
765 <*>. pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
767 <<EOF>> {
768 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
769 bufferstackentry_t *bep = pop_buffer();
771 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
772 ppy_warning("Unmatched #if/#endif at end of file");
774 if(!bep)
775 {
776 if(YY_START != INITIAL)
777 {
778 ppy_error("Unexpected end of file during preprocessing");
779 BEGIN(INITIAL);
780 }
781 yyterminate();
782 }
783 else if(bep->should_pop == 2)
784 {
785 macexpstackentry_t *mac;
786 mac = pop_macro();
787 expand_macro(mac);
788 }
789 ppy__delete_buffer(b);
790 }
792 %%
793 /*
794 **************************************************************************
795 * Support functions
796 **************************************************************************
797 */
799 #ifndef ppy_wrap
800 int ppy_wrap(void)
801 {
802 return 1;
803 }
804 #endif
807 /*
808 *-------------------------------------------------------------------------
809 * Output newlines or set them as continuations
810 *
811 * Input: -1 - Don't count this one, but update local position (see pp_dqs)
812 * 0 - Line-continuation seen and cache output
813 * 1 - Newline seen and flush output
814 *-------------------------------------------------------------------------
815 */
816 static void newline(int dowrite)
817 {
818 pp_status.line_number++;
819 pp_status.char_number = 1;
821 if(dowrite == -1)
822 return;
824 ncontinuations++;
825 if(dowrite)
826 {
827 for(;ncontinuations; ncontinuations--)
828 put_buffer("\n", 1);
829 }
830 }
833 /*
834 *-------------------------------------------------------------------------
835 * Make a number out of an any-base and suffixed string
836 *
837 * Possible number extensions:
838 * - "" int
839 * - "L" long int
840 * - "LL" long long int
841 * - "U" unsigned int
842 * - "UL" unsigned long int
843 * - "ULL" unsigned long long int
844 * - "LU" unsigned long int
845 * - "LLU" unsigned long long int
846 * - "LUL" invalid
847 *
848 * FIXME:
849 * The sizes of resulting 'int' and 'long' are compiler specific.
850 * I depend on sizeof(int) > 2 here (although a relatively safe
851 * assumption).
852 * Long longs are not yet implemented because this is very compiler
853 * specific and I don't want to think too much about the problems.
854 *
855 *-------------------------------------------------------------------------
856 */
857 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
858 {
859 int is_l = 0;
860 int is_ll = 0;
861 int is_u = 0;
862 char ext[4];
863 long l;
865 ext[3] = '\0';
866 ext[2] = toupper(str[len-1]);
867 ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
868 ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
870 if(!strcmp(ext, "LUL"))
871 {
872 ppy_error("Invalid constant suffix");
873 return 0;
874 }
875 else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
876 {
877 is_ll++;
878 is_u++;
879 }
880 else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
881 {
882 is_l++;
883 is_u++;
884 }
885 else if(!strcmp(ext+1, "LL"))
886 {
887 is_ll++;
888 }
889 else if(!strcmp(ext+2, "L"))
890 {
891 is_l++;
892 }
893 else if(!strcmp(ext+2, "U"))
894 {
895 is_u++;
896 }
898 if(is_ll)
899 {
900 /* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
901 #ifdef HAVE_LONG_LONG
902 if (is_u)
903 {
904 errno = 0;
905 val->ull = strtoull(str, NULL, radix);
906 if (val->ull == ULLONG_MAX && errno == ERANGE)
907 ppy_error("integer constant %s is too large\n", str);
908 return tULONGLONG;
909 }
910 else
911 {
912 errno = 0;
913 val->sll = strtoll(str, NULL, radix);
914 if ((val->sll == LLONG_MIN || val->sll == LLONG_MAX) && errno == ERANGE)
915 ppy_error("integer constant %s is too large\n", str);
916 return tSLONGLONG;
917 }
918 #else
919 pp_internal_error(__FILE__, __LINE__, "long long constants not supported on this platform");
920 #endif
921 }
922 else if(is_u && is_l)
923 {
924 errno = 0;
925 val->ulong = strtoul(str, NULL, radix);
926 if (val->ulong == ULONG_MAX && errno == ERANGE)
927 ppy_error("integer constant %s is too large\n", str);
928 return tULONG;
929 }
930 else if(!is_u && is_l)
931 {
932 errno = 0;
933 val->slong = strtol(str, NULL, radix);
934 if ((val->slong == LONG_MIN || val->slong == LONG_MAX) && errno == ERANGE)
935 ppy_error("integer constant %s is too large\n", str);
936 return tSLONG;
937 }
938 else if(is_u && !is_l)
939 {
940 unsigned long ul;
941 errno = 0;
942 ul = strtoul(str, NULL, radix);
943 if ((ul == ULONG_MAX && errno == ERANGE) || (ul > UINT_MAX))
944 ppy_error("integer constant %s is too large\n", str);
945 val->uint = (unsigned int)ul;
946 return tUINT;
947 }
949 /* Else it must be an int... */
950 errno = 0;
951 l = strtol(str, NULL, radix);
952 if (((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE) ||
953 (l > INT_MAX) || (l < INT_MIN))
954 ppy_error("integer constant %s is too large\n", str);
955 val->sint = (int)l;
956 return tSINT;
957 }
960 /*
961 *-------------------------------------------------------------------------
962 * Macro and define expansion support
963 *
964 * FIXME: Variable macro arguments.
965 *-------------------------------------------------------------------------
966 */
967 static void expand_special(pp_entry_t *ppp)
968 {
969 static char *buf = NULL;
970 char *new_buf;
972 assert(ppp->type == def_special);
974 if(!strcmp(ppp->ident, "__LINE__"))
975 {
976 new_buf = pp_xrealloc(buf, 32);
977 if(!new_buf)
978 return;
979 buf = new_buf;
980 sprintf(buf, "%d", pp_status.line_number);
981 }
982 else if(!strcmp(ppp->ident, "__FILE__"))
983 {
984 new_buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
985 if(!new_buf)
986 return;
987 buf = new_buf;
988 sprintf(buf, "\"%s\"", pp_status.input);
989 }
990 else
991 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
993 if(pp_flex_debug)
994 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
995 macexpstackidx,
996 pp_status.input,
997 pp_status.line_number,
998 ppp->ident,
999 buf ? buf : "");
1001 if(buf && buf[0])
1002 {
1003 push_buffer(ppp, NULL, NULL, 0);
1004 yy_scan_string(buf);
1005 }
1006 }
1008 static void expand_define(pp_entry_t *ppp)
1009 {
1010 assert(ppp->type == def_define);
1012 if(pp_flex_debug)
1013 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
1014 macexpstackidx,
1015 pp_status.input,
1016 pp_status.line_number,
1017 ppp->ident,
1018 ppp->subst.text);
1019 if(ppp->subst.text && ppp->subst.text[0])
1020 {
1021 push_buffer(ppp, NULL, NULL, 0);
1022 yy_scan_string(ppp->subst.text);
1023 }
1024 }
1026 static int curdef_idx = 0;
1027 static int curdef_alloc = 0;
1028 static char *curdef_text = NULL;
1030 static void add_text(const char *str, int len)
1031 {
1032 int new_alloc;
1033 char *new_text;
1035 if(len == 0)
1036 return;
1037 if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
1038 {
1039 new_alloc = curdef_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1040 new_text = pp_xrealloc(curdef_text, new_alloc * sizeof(curdef_text[0]));
1041 if(!new_text)
1042 return;
1043 curdef_text = new_text;
1044 curdef_alloc = new_alloc;
1045 if(curdef_alloc > 65536)
1046 ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
1047 }
1048 memcpy(&curdef_text[curdef_idx], str, len);
1049 curdef_idx += len;
1050 }
1052 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
1053 {
1054 char *cptr;
1055 char *exp;
1056 int tag;
1057 int n;
1059 if(mtp == NULL)
1060 return NULL;
1062 switch(mtp->type)
1063 {
1064 case exp_text:
1065 if(pp_flex_debug)
1066 fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
1067 add_text(mtp->subst.text, strlen(mtp->subst.text));
1068 break;
1070 case exp_stringize:
1071 if(pp_flex_debug)
1072 fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
1073 mtp->subst.argidx,
1074 mep->args[mtp->subst.argidx]);
1075 cptr = mep->args[mtp->subst.argidx];
1076 add_text("\"", 1);
1077 while(*cptr)
1078 {
1079 if(*cptr == '"' || *cptr == '\\')
1080 add_text("\\", 1);
1081 add_text(cptr, 1);
1082 cptr++;
1083 }
1084 add_text("\"", 1);
1085 break;
1087 case exp_concat:
1088 if(pp_flex_debug)
1089 fprintf(stderr, "add_expand_text: exp_concat\n");
1090 /* Remove trailing whitespace from current expansion text */
1091 while(curdef_idx)
1092 {
1093 if(isspace(curdef_text[curdef_idx-1] & 0xff))
1094 curdef_idx--;
1095 else
1096 break;
1097 }
1098 /* tag current position and recursively expand the next part */
1099 tag = curdef_idx;
1100 mtp = add_expand_text(mtp->next, mep, nnl);
1102 /* Now get rid of the leading space of the expansion */
1103 cptr = &curdef_text[tag];
1104 n = curdef_idx - tag;
1105 while(n)
1106 {
1107 if(isspace(*cptr & 0xff))
1108 {
1109 cptr++;
1110 n--;
1111 }
1112 else
1113 break;
1114 }
1115 if(cptr != &curdef_text[tag])
1116 {
1117 memmove(&curdef_text[tag], cptr, n);
1118 curdef_idx -= (curdef_idx - tag) - n;
1119 }
1120 break;
1122 case exp_subst:
1123 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1124 exp = mep->args[mtp->subst.argidx];
1125 else
1126 exp = mep->ppargs[mtp->subst.argidx];
1127 if(exp)
1128 {
1129 add_text(exp, strlen(exp));
1130 *nnl -= mep->nnls[mtp->subst.argidx];
1131 cptr = strchr(exp, '\n');
1132 while(cptr)
1133 {
1134 *cptr = ' ';
1135 cptr = strchr(cptr+1, '\n');
1136 }
1137 mep->nnls[mtp->subst.argidx] = 0;
1138 }
1139 if(pp_flex_debug)
1140 fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1141 break;
1143 default:
1144 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1145 }
1146 return mtp;
1147 }
1149 static void expand_macro(macexpstackentry_t *mep)
1150 {
1151 mtext_t *mtp;
1152 int n, k;
1153 char *cptr;
1154 int nnl = 0;
1155 pp_entry_t *ppp = mep->ppp;
1156 int nargs = mep->nargs;
1158 assert(ppp->type == def_macro);
1159 assert(ppp->expanding == 0);
1161 if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1162 {
1163 ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1164 return;
1165 }
1167 for(n = 0; n < nargs; n++)
1168 nnl += mep->nnls[n];
1170 if(pp_flex_debug)
1171 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1172 macexpstackidx,
1173 pp_status.input,
1174 pp_status.line_number,
1175 ppp->ident,
1176 mep->nargs,
1177 nnl);
1179 curdef_idx = 0;
1181 for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1182 {
1183 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1184 break;
1185 }
1187 for(n = 0; n < nnl; n++)
1188 add_text("\n", 1);
1190 /* To make sure there is room and termination (see below) */
1191 add_text(" \0", 2);
1193 /* Strip trailing whitespace from expansion */
1194 for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1195 {
1196 if(!isspace(*cptr & 0xff))
1197 break;
1198 }
1200 /*
1201 * We must add *one* whitespace to make sure that there
1202 * is a token-separation after the expansion.
1203 */
1204 *(++cptr) = ' ';
1205 *(++cptr) = '\0';
1206 k++;
1208 /* Strip leading whitespace from expansion */
1209 for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1210 {
1211 if(!isspace(*cptr & 0xff))
1212 break;
1213 }
1215 if(k - n > 0)
1216 {
1217 if(pp_flex_debug)
1218 fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1219 push_buffer(ppp, NULL, NULL, 0);
1220 /*yy_scan_bytes(curdef_text + n, k - n);*/
1221 yy_scan_string(curdef_text + n);
1222 }
1223 }
1225 /*
1226 *-------------------------------------------------------------------------
1227 * String collection routines
1228 *-------------------------------------------------------------------------
1229 */
1230 static void new_string(void)
1231 {
1232 #ifdef DEBUG
1233 if(strbuf_idx)
1234 ppy_warning("new_string: strbuf_idx != 0");
1235 #endif
1236 strbuf_idx = 0;
1237 str_startline = pp_status.line_number;
1238 }
1240 static void add_string(const char *str, int len)
1241 {
1242 int new_alloc;
1243 char *new_buffer;
1245 if(len == 0)
1246 return;
1247 if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1248 {
1249 new_alloc = strbuf_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1250 new_buffer = pp_xrealloc(strbuffer, new_alloc * sizeof(strbuffer[0]));
1251 if(!new_buffer)
1252 return;
1253 strbuffer = new_buffer;
1254 strbuf_alloc = new_alloc;
1255 if(strbuf_alloc > 65536)
1256 ppy_warning("Reallocating string buffer larger than 64kB");
1257 }
1258 memcpy(&strbuffer[strbuf_idx], str, len);
1259 strbuf_idx += len;
1260 }
1262 static char *get_string(void)
1263 {
1264 char *str = pp_xmalloc(strbuf_idx + 1);
1265 if(!str)
1266 return NULL;
1267 memcpy(str, strbuffer, strbuf_idx);
1268 str[strbuf_idx] = '\0';
1269 #ifdef DEBUG
1270 strbuf_idx = 0;
1271 #endif
1272 return str;
1273 }
1275 static void put_string(void)
1276 {
1277 put_buffer(strbuffer, strbuf_idx);
1278 #ifdef DEBUG
1279 strbuf_idx = 0;
1280 #endif
1281 }
1283 static int string_start(void)
1284 {
1285 return str_startline;
1286 }
1289 /*
1290 *-------------------------------------------------------------------------
1291 * Buffer management
1292 *-------------------------------------------------------------------------
1293 */
1294 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1295 {
1296 if(ppy_debug)
1297 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1298 if(bufferstackidx >= MAXBUFFERSTACK)
1299 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1301 memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1302 bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1303 bufferstack[bufferstackidx].filehandle = pp_status.file;
1304 bufferstack[bufferstackidx].define = ppp;
1305 bufferstack[bufferstackidx].line_number = pp_status.line_number;
1306 bufferstack[bufferstackidx].char_number = pp_status.char_number;
1307 bufferstack[bufferstackidx].if_depth = pp_get_if_depth();
1308 bufferstack[bufferstackidx].should_pop = pop;
1309 bufferstack[bufferstackidx].filename = pp_status.input;
1310 bufferstack[bufferstackidx].ncontinuations = ncontinuations;
1311 bufferstack[bufferstackidx].incl = pp_incl_state;
1312 bufferstack[bufferstackidx].include_filename = incname;
1314 if(ppp)
1315 ppp->expanding = 1;
1316 else if(filename)
1317 {
1318 /* These will track the ppy_error to the correct file and line */
1319 pp_status.line_number = 1;
1320 pp_status.char_number = 1;
1321 pp_status.input = filename;
1322 ncontinuations = 0;
1323 }
1324 else if(!pop)
1325 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1326 bufferstackidx++;
1327 }
1329 static bufferstackentry_t *pop_buffer(void)
1330 {
1331 if(bufferstackidx < 0)
1332 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1334 if(bufferstackidx == 0)
1335 return NULL;
1337 bufferstackidx--;
1339 if(bufferstack[bufferstackidx].define)
1340 bufferstack[bufferstackidx].define->expanding = 0;
1341 else
1342 {
1343 if(!bufferstack[bufferstackidx].should_pop)
1344 {
1345 wpp_callbacks->close(pp_status.file);
1346 pp_writestring("# %d \"%s\" 2\n", bufferstack[bufferstackidx].line_number, bufferstack[bufferstackidx].filename);
1348 /* We have EOF, check the include logic */
1349 if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1350 {
1351 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1352 if(ppp)
1353 {
1354 includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1355 if(!iep)
1356 return NULL;
1358 iep->ppp = ppp;
1359 ppp->iep = iep;
1360 iep->filename = bufferstack[bufferstackidx].include_filename;
1361 iep->prev = NULL;
1362 iep->next = pp_includelogiclist;
1363 if(iep->next)
1364 iep->next->prev = iep;
1365 pp_includelogiclist = iep;
1366 if(pp_status.debug)
1367 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);
1368 }
1369 else
1370 free(bufferstack[bufferstackidx].include_filename);
1371 }
1372 free(pp_incl_state.ppp);
1373 pp_incl_state = bufferstack[bufferstackidx].incl;
1375 }
1376 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1377 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1378 pp_status.input = bufferstack[bufferstackidx].filename;
1379 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1380 }
1382 if(ppy_debug)
1383 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1384 bufferstackidx,
1385 bufferstack[bufferstackidx].bufferstate,
1386 bufferstack[bufferstackidx].define,
1387 bufferstack[bufferstackidx].line_number,
1388 bufferstack[bufferstackidx].char_number,
1389 bufferstack[bufferstackidx].if_depth,
1390 bufferstack[bufferstackidx].filename,
1391 bufferstack[bufferstackidx].should_pop);
1393 pp_status.file = bufferstack[bufferstackidx].filehandle;
1394 ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1396 if(bufferstack[bufferstackidx].should_pop)
1397 {
1398 if(yy_current_state() == pp_macexp)
1399 macro_add_expansion();
1400 else
1401 pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1402 yy_pop_state();
1403 }
1405 return &bufferstack[bufferstackidx];
1406 }
1409 /*
1410 *-------------------------------------------------------------------------
1411 * Macro nestng support
1412 *-------------------------------------------------------------------------
1413 */
1414 static void push_macro(pp_entry_t *ppp)
1415 {
1416 if(macexpstackidx >= MAXMACEXPSTACK)
1417 {
1418 ppy_error("Too many nested macros");
1419 return;
1420 }
1422 macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1423 if(!macexpstack[macexpstackidx])
1424 return;
1425 memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1426 macexpstack[macexpstackidx]->ppp = ppp;
1427 macexpstackidx++;
1428 }
1430 static macexpstackentry_t *top_macro(void)
1431 {
1432 return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1433 }
1435 static macexpstackentry_t *pop_macro(void)
1436 {
1437 if(macexpstackidx <= 0)
1438 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1439 return macexpstack[--macexpstackidx];
1440 }
1442 static void free_macro(macexpstackentry_t *mep)
1443 {
1444 int i;
1446 for(i = 0; i < mep->nargs; i++)
1447 free(mep->args[i]);
1448 free(mep->args);
1449 free(mep->nnls);
1450 free(mep->curarg);
1451 free(mep);
1452 }
1454 static void add_text_to_macro(const char *text, int len)
1455 {
1456 macexpstackentry_t *mep = top_macro();
1458 assert(mep->ppp->expanding == 0);
1460 if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1461 {
1462 char *new_curarg;
1463 int new_alloc = mep->curargalloc + ((ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1);
1464 new_curarg = pp_xrealloc(mep->curarg, new_alloc * sizeof(mep->curarg[0]));
1465 if(!new_curarg)
1466 return;
1467 mep->curarg = new_curarg;
1468 mep->curargalloc = new_alloc;
1469 }
1470 memcpy(mep->curarg + mep->curargsize, text, len);
1471 mep->curargsize += len;
1472 mep->curarg[mep->curargsize] = '\0';
1473 }
1475 static void macro_add_arg(int last)
1476 {
1477 int nnl = 0;
1478 char *cptr;
1479 char **new_args, **new_ppargs;
1480 int *new_nnls;
1481 macexpstackentry_t *mep = top_macro();
1483 assert(mep->ppp->expanding == 0);
1485 new_args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1486 if(!new_args)
1487 return;
1488 mep->args = new_args;
1490 new_ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1491 if(!new_ppargs)
1492 return;
1493 mep->ppargs = new_ppargs;
1495 new_nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1496 if(!new_nnls)
1497 return;
1498 mep->nnls = new_nnls;
1500 mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1501 if(!mep->args[mep->nargs])
1502 return;
1503 cptr = mep->args[mep->nargs]-1;
1504 while((cptr = strchr(cptr+1, '\n')))
1505 {
1506 nnl++;
1507 }
1508 mep->nnls[mep->nargs] = nnl;
1509 mep->nargs++;
1510 free(mep->curarg);
1511 mep->curargalloc = mep->curargsize = 0;
1512 mep->curarg = NULL;
1514 if(pp_flex_debug)
1515 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1516 pp_status.input,
1517 pp_status.line_number,
1518 mep->nargs-1,
1519 mep->args[mep->nargs-1]);
1521 /* Each macro argument must be expanded to cope with stingize */
1522 if(last || mep->args[mep->nargs-1][0])
1523 {
1524 yy_push_state(pp_macexp);
1525 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1526 yy_scan_string(mep->args[mep->nargs-1]);
1527 /*mep->bufferstackidx = bufferstackidx; But not nested! */
1528 }
1529 }
1531 static void macro_add_expansion(void)
1532 {
1533 macexpstackentry_t *mep = top_macro();
1535 assert(mep->ppp->expanding == 0);
1537 mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1538 free(mep->curarg);
1539 mep->curargalloc = mep->curargsize = 0;
1540 mep->curarg = NULL;
1542 if(pp_flex_debug)
1543 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1544 pp_status.input,
1545 pp_status.line_number,
1546 mep->nargs-1,
1547 mep->ppargs[mep->nargs-1] ? mep->ppargs[mep->nargs-1] : "");
1548 }
1551 /*
1552 *-------------------------------------------------------------------------
1553 * Output management
1554 *-------------------------------------------------------------------------
1555 */
1556 static void put_buffer(const char *s, int len)
1557 {
1558 if(top_macro())
1559 add_text_to_macro(s, len);
1560 else
1561 wpp_callbacks->write(s, len);
1562 }
1565 /*
1566 *-------------------------------------------------------------------------
1567 * Include management
1568 *-------------------------------------------------------------------------
1569 */
1570 void pp_do_include(char *fname, int type)
1571 {
1572 char *newpath;
1573 int n;
1574 includelogicentry_t *iep;
1575 void *fp;
1577 if(!fname)
1578 return;
1580 for(iep = pp_includelogiclist; iep; iep = iep->next)
1581 {
1582 if(!strcmp(iep->filename, fname))
1583 {
1584 /*
1585 * We are done. The file was included before.
1586 * If the define was deleted, then this entry would have
1587 * been deleted too.
1588 */
1589 return;
1590 }
1591 }
1593 n = strlen(fname);
1595 if(n <= 2)
1596 {
1597 ppy_error("Empty include filename");
1598 return;
1599 }
1601 /* Undo the effect of the quotation */
1602 fname[n-1] = '\0';
1604 if((fp = pp_open_include(fname+1, type, pp_status.input, &newpath)) == NULL)
1605 {
1606 ppy_error("Unable to open include file %s", fname+1);
1607 return;
1608 }
1610 fname[n-1] = *fname; /* Redo the quotes */
1611 push_buffer(NULL, newpath, fname, 0);
1612 pp_incl_state.seen_junk = 0;
1613 pp_incl_state.state = 0;
1614 pp_incl_state.ppp = NULL;
1616 if(pp_status.debug)
1617 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
1618 pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
1619 pp_status.file = fp;
1620 ppy__switch_to_buffer(ppy__create_buffer(NULL, YY_BUF_SIZE));
1622 pp_writestring("# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1623 }
1625 /*
1626 *-------------------------------------------------------------------------
1627 * Push/pop preprocessor ignore state when processing conditionals
1628 * which are false.
1629 *-------------------------------------------------------------------------
1630 */
1631 void pp_push_ignore_state(void)
1632 {
1633 yy_push_state(pp_ignore);
1634 }
1636 void pp_pop_ignore_state(void)
1637 {
1638 yy_pop_state();
1639 }