| blob | a68124355be118a1fdc8d5f9d43965db29fe90b1 |
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_ifignored
154 %x pp_endif
155 %x pp_line
156 %x pp_defined
157 %x pp_ignore
158 %x RCINCL
160 ws [ \v\f\t\r]
161 cident [a-zA-Z_][0-9a-zA-Z_]*
162 ul [uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
164 %{
165 #include <stdio.h>
166 #include <stdlib.h>
167 #include <string.h>
168 #include <ctype.h>
169 #include <assert.h>
170 #include <errno.h>
171 #include <limits.h>
173 #ifndef LLONG_MAX
174 # define LLONG_MAX ((__int64)0x7fffffff << 32 | 0xffffffff)
175 # define LLONG_MIN (-LLONG_MAX - 1)
176 #endif
177 #ifndef ULLONG_MAX
178 # define ULLONG_MAX ((__int64)0xffffffff << 32 | 0xffffffff)
179 #endif
181 #ifndef HAVE_UNISTD_H
182 #define YY_NO_UNISTD_H
183 #endif
185 #include "wine/wpp.h"
186 #include "wpp_private.h"
187 #include "ppy.tab.h"
189 /*
190 * Make sure that we are running an appropriate version of flex.
191 */
192 #if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
193 #error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
194 #endif
196 #define YY_READ_BUF_SIZE 65536 /* So we read most of a file at once */
198 #define yy_current_state() YY_START
199 #define yy_pp_state(x) yy_pop_state(); yy_push_state(x)
201 /*
202 * Always update the current character position within a line
203 */
204 #define YY_USER_ACTION pp_status.char_number+=ppy_leng;
206 /*
207 * Buffer management for includes and expansions
208 */
209 #define MAXBUFFERSTACK 128 /* Nesting more than 128 includes or macro expansion textss is insane */
211 typedef struct bufferstackentry {
212 YY_BUFFER_STATE bufferstate; /* Buffer to switch back to */
213 void *filehandle; /* Handle to be used with wpp_callbacks->read */
214 pp_entry_t *define; /* Points to expanding define or NULL if handling includes */
215 int line_number; /* Line that we were handling */
216 int char_number; /* The current position on that line */
217 char *filename; /* Filename that we were handling */
218 int if_depth; /* How many #if:s deep to check matching #endif:s */
219 int ncontinuations; /* Remember the continuation state */
220 int should_pop; /* Set if we must pop the start-state on EOF */
221 /* Include management */
222 include_state_t incl;
223 char *include_filename;
224 } bufferstackentry_t;
226 #define ALLOCBLOCKSIZE (1 << 10) /* Allocate these chunks at a time for string-buffers */
228 /*
229 * Macro expansion nesting
230 * We need the stack to handle expansions while scanning
231 * a macro's arguments. The TOS must always be the macro
232 * that receives the current expansion from the scanner.
233 */
234 #define MAXMACEXPSTACK 128 /* Nesting more than 128 macro expansions is insane */
236 typedef struct macexpstackentry {
237 pp_entry_t *ppp; /* This macro we are scanning */
238 char **args; /* With these arguments */
239 char **ppargs; /* Resulting in these preprocessed arguments */
240 int *nnls; /* Number of newlines per argument */
241 int nargs; /* And this many arguments scanned */
242 int parentheses; /* Nesting level of () */
243 int curargsize; /* Current scanning argument's size */
244 int curargalloc; /* Current scanning argument's block allocated */
245 char *curarg; /* Current scanning argument's content */
246 } macexpstackentry_t;
248 #define MACROPARENTHESES() (top_macro()->parentheses)
250 /*
251 * Prototypes
252 */
253 static void newline(int);
254 static int make_number(int radix, YYSTYPE *val, const char *str, int len);
255 static void put_buffer(const char *s, int len);
256 /* Buffer management */
257 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
258 static bufferstackentry_t *pop_buffer(void);
259 /* String functions */
260 static void new_string(void);
261 static void add_string(const char *str, int len);
262 static char *get_string(void);
263 static void put_string(void);
264 static int string_start(void);
265 /* Macro functions */
266 static void push_macro(pp_entry_t *ppp);
267 static macexpstackentry_t *top_macro(void);
268 static macexpstackentry_t *pop_macro(void);
269 static void free_macro(macexpstackentry_t *mep);
270 static void add_text_to_macro(const char *text, int len);
271 static void macro_add_arg(int last);
272 static void macro_add_expansion(void);
273 /* Expansion */
274 static void expand_special(pp_entry_t *ppp);
275 static void expand_define(pp_entry_t *ppp);
276 static void expand_macro(macexpstackentry_t *mep);
278 /*
279 * Local variables
280 */
281 static int ncontinuations;
283 static int strbuf_idx = 0;
284 static int strbuf_alloc = 0;
285 static char *strbuffer = NULL;
286 static int str_startline;
288 static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
289 static int macexpstackidx = 0;
291 static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
292 static int bufferstackidx = 0;
294 /*
295 * Global variables
296 */
297 include_state_t pp_incl_state =
298 {
299 -1, /* state */
300 NULL, /* ppp */
301 0, /* ifdepth */
302 0 /* seen_junk */
303 };
305 includelogicentry_t *pp_includelogiclist = NULL;
307 #define YY_INPUT(buf,result,max_size) \
308 { \
309 result = fread(buf, 1, max_size, pp_status.file); \
310 }
312 #define BUFFERINITIALCAPACITY 256
314 void pp_writestring(const char *format, ...)
315 {
316 va_list valist;
317 int len;
318 static char *buffer;
319 static int buffercapacity;
320 char *new_buffer;
322 if(buffercapacity == 0)
323 {
324 buffer = pp_xmalloc(BUFFERINITIALCAPACITY);
325 if(buffer == NULL)
326 return;
327 buffercapacity = BUFFERINITIALCAPACITY;
328 }
330 va_start(valist, format);
331 len = vsnprintf(buffer, buffercapacity,
332 format, valist);
333 va_end(valist);
334 /* If the string is longer than buffersize, vsnprintf returns
335 * the string length with glibc >= 2.1, -1 with glibc < 2.1 */
336 while(len > buffercapacity || len < 0)
337 {
338 do
339 {
340 buffercapacity *= 2;
341 } while(len > buffercapacity);
343 new_buffer = pp_xrealloc(buffer, buffercapacity);
344 if(new_buffer == NULL)
345 {
346 va_end(valist);
347 return;
348 }
349 buffer = new_buffer;
350 va_start(valist, format);
351 len = vsnprintf(buffer, buffercapacity,
352 format, valist);
353 va_end(valist);
354 }
356 fwrite(buffer, 1, len, ppy_out);
357 }
359 %}
361 /*
362 **************************************************************************
363 * The scanner starts here
364 **************************************************************************
365 */
367 %%
368 /*
369 * Catch line-continuations.
370 * Note: Gcc keeps the line-continuations in, for example, strings
371 * intact. However, I prefer to remove them all so that the next
372 * scanner will not need to reduce the continuation state.
373 *
374 * <*>\\\n newline(0);
375 */
377 /*
378 * Detect the leading # of a preprocessor directive.
379 */
380 <INITIAL,pp_ignore>^{ws}*# pp_incl_state.seen_junk++; yy_push_state(pp_pp);
382 /*
383 * Scan for the preprocessor directives
384 */
385 <pp_pp>{ws}*include{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
386 <pp_pp>{ws}*define{ws}* yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
387 <pp_pp>{ws}*error{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tERROR;
388 <pp_pp>{ws}*warning{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tWARNING;
389 <pp_pp>{ws}*pragma{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPRAGMA;
390 <pp_pp>{ws}*ident{ws}* yy_pp_state(pp_eol); if(yy_top_state() != pp_ignore) return tPPIDENT;
391 <pp_pp>{ws}*undef{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
392 <pp_pp>{ws}*ifdef{ws}* yy_pp_state(pp_ifd); return tIFDEF;
393 <pp_pp>{ws}*ifndef{ws}* pp_incl_state.seen_junk--; yy_pp_state(pp_ifd); return tIFNDEF;
394 <pp_pp>{ws}*if{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_if);} else {yy_pp_state(pp_ifignored);} return tIF;
395 <pp_pp>{ws}*elif{ws}* yy_pp_state(pp_if); return tELIF;
396 <pp_pp>{ws}*else{ws}* yy_pp_state(pp_endif); return tELSE;
397 <pp_pp>{ws}*endif{ws}* yy_pp_state(pp_endif); return tENDIF;
398 <pp_pp>{ws}*line{ws}* if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
399 <pp_pp>{ws}+ if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
400 <pp_pp>{ws}*[a-z]+ ppy_error("Invalid preprocessor token '%s'", ppy_text);
401 <pp_pp>\r?\n newline(1); yy_pop_state(); return tNL; /* This could be the null-token */
402 <pp_pp>\\\r?\n newline(0);
403 <pp_pp>\\\r? ppy_error("Preprocessor junk '%s'", ppy_text);
404 <pp_pp>. return *ppy_text;
406 /*
407 * Handle #include and #line
408 */
409 <pp_line>[0-9]+ return make_number(10, &ppy_lval, ppy_text, ppy_leng);
410 <pp_inc>\< new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
411 <pp_inc,pp_line>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
412 <pp_inc,pp_line>{ws}+ ;
413 <pp_inc,pp_line>\n newline(1); yy_pop_state(); return tNL;
414 <pp_inc,pp_line>\\\r?\n newline(0);
415 <pp_inc,pp_line>(\\\r?)|(.) ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
417 /*
418 * Ignore all input when a false clause is parsed
419 */
420 <pp_ignore>[^#/\\\n]+ ;
421 <pp_ignore>\n newline(1);
422 <pp_ignore>\\\r?\n newline(0);
423 <pp_ignore>(\\\r?)|(.) ;
425 /*
426 * Handle #if and #elif.
427 * These require conditionals to be evaluated, but we do not
428 * want to jam the scanner normally when we see these tokens.
429 * Note: tIDENT is handled below.
430 */
432 <pp_if>0[0-7]*{ul}? return make_number(8, &ppy_lval, ppy_text, ppy_leng);
433 <pp_if>0[0-7]*[8-9]+{ul}? ppy_error("Invalid octal digit");
434 <pp_if>[1-9][0-9]*{ul}? return make_number(10, &ppy_lval, ppy_text, ppy_leng);
435 <pp_if>0[xX][0-9a-fA-F]+{ul}? return make_number(16, &ppy_lval, ppy_text, ppy_leng);
436 <pp_if>0[xX] ppy_error("Invalid hex number");
437 <pp_if>defined yy_push_state(pp_defined); return tDEFINED;
438 <pp_if>"<<" return tLSHIFT;
439 <pp_if>">>" return tRSHIFT;
440 <pp_if>"&&" return tLOGAND;
441 <pp_if>"||" return tLOGOR;
442 <pp_if>"==" return tEQ;
443 <pp_if>"!=" return tNE;
444 <pp_if>"<=" return tLTE;
445 <pp_if>">=" return tGTE;
446 <pp_if>\n newline(1); yy_pop_state(); return tNL;
447 <pp_if>\\\r?\n newline(0);
448 <pp_if>\\\r? ppy_error("Junk in conditional expression");
449 <pp_if>{ws}+ ;
450 <pp_if>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
451 <pp_if>\" ppy_error("String constants not allowed in conditionals");
452 <pp_if>. return *ppy_text;
454 <pp_ifignored>[^\n]+ ppy_lval.sint = 0; return tSINT;
455 <pp_ifignored>\n newline(1); yy_pop_state(); return tNL;
457 /*
458 * Handle #ifdef, #ifndef and #undef
459 * to get only an untranslated/unexpanded identifier
460 */
461 <pp_ifd>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
462 <pp_ifd>{ws}+ ;
463 <pp_ifd>\n newline(1); yy_pop_state(); return tNL;
464 <pp_ifd>\\\r?\n newline(0);
465 <pp_ifd>(\\\r?)|(.) ppy_error("Identifier expected");
467 /*
468 * Handle #else and #endif.
469 */
470 <pp_endif>{ws}+ ;
471 <pp_endif>\n newline(1); yy_pop_state(); return tNL;
472 <pp_endif>\\\r?\n newline(0);
473 <pp_endif>. ppy_error("Garbage after #else or #endif.");
475 /*
476 * Handle the special 'defined' keyword.
477 * This is necessary to get the identifier prior to any
478 * substitutions.
479 */
480 <pp_defined>{cident} yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
481 <pp_defined>{ws}+ ;
482 <pp_defined>(\()|(\)) return *ppy_text;
483 <pp_defined>\\\r?\n newline(0);
484 <pp_defined>(\\.)|(\n)|(.) ppy_error("Identifier expected");
486 /*
487 * Handle #error, #warning, #pragma and #ident.
488 * Pass everything literally to the parser, which
489 * will act appropriately.
490 * Comments are stripped from the literal text.
491 */
492 <pp_eol>[^/\\\n]+ if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
493 <pp_eol>\/[^/\\\n*]* if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
494 <pp_eol>(\\\r?)|(\/[^/*]) if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
495 <pp_eol>\n newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
496 <pp_eol>\\\r?\n newline(0);
498 /*
499 * Handle left side of #define
500 */
501 <pp_def>{cident}\( ppy_lval.cptr = pp_xstrdup(ppy_text); if(ppy_lval.cptr) ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro); return tMACRO;
502 <pp_def>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
503 <pp_def>{ws}+ ;
504 <pp_def>\\\r?\n newline(0);
505 <pp_def>(\\\r?)|(\n)|(.) perror("Identifier expected");
507 /*
508 * Scan the substitution of a define
509 */
510 <pp_define>[^'"/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
511 <pp_define>(\\\r?)|(\/[^/*]) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
512 <pp_define>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
513 <pp_define>\\\r?\n newline(0);
514 <pp_define>\n newline(1); yy_pop_state(); return tNL;
515 <pp_define>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
516 <pp_define>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
518 /*
519 * Scan the definition macro arguments
520 */
521 <pp_macro>\){ws}* yy_pp_state(pp_mbody); return tMACROEND;
522 <pp_macro>{ws}+ ;
523 <pp_macro>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
524 <pp_macro>, return ',';
525 <pp_macro>"..." return tELIPSIS;
526 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?) ppy_error("Argument identifier expected");
527 <pp_macro>\\\r?\n newline(0);
529 /*
530 * Scan the substitution of a macro
531 */
532 <pp_mbody>[^a-zA-Z0-9'"#/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
533 <pp_mbody>{cident} ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
534 <pp_mbody>\#\# return tCONCAT;
535 <pp_mbody>\# return tSTRINGIZE;
536 <pp_mbody>[0-9][a-zA-Z0-9]*[^a-zA-Z0-9'"#/\\\n]* ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
537 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*) ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
538 <pp_mbody>\\\r?\n{ws}+ newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
539 <pp_mbody>\\\r?\n newline(0);
540 <pp_mbody>\n newline(1); yy_pop_state(); return tNL;
541 <pp_mbody>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
542 <pp_mbody>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
544 /*
545 * Macro expansion text scanning.
546 * This state is active just after the identifier is scanned
547 * that triggers an expansion. We *must* delete the leading
548 * whitespace before we can start scanning for arguments.
549 *
550 * If we do not see a '(' as next trailing token, then we have
551 * a false alarm. We just continue with a nose-bleed...
552 */
553 <pp_macign>{ws}*/\( yy_pp_state(pp_macscan);
554 <pp_macign>{ws}*\n {
555 if(yy_top_state() != pp_macscan)
556 newline(0);
557 }
558 <pp_macign>{ws}*\\\r?\n newline(0);
559 <pp_macign>{ws}+|{ws}*\\\r?|. {
560 macexpstackentry_t *mac = pop_macro();
561 yy_pop_state();
562 put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
563 put_buffer(ppy_text, ppy_leng);
564 free_macro(mac);
565 }
567 /*
568 * Macro expansion argument text scanning.
569 * This state is active when a macro's arguments are being read for expansion.
570 */
571 <pp_macscan>\( {
572 if(++MACROPARENTHESES() > 1)
573 add_text_to_macro(ppy_text, ppy_leng);
574 }
575 <pp_macscan>\) {
576 if(--MACROPARENTHESES() == 0)
577 {
578 yy_pop_state();
579 macro_add_arg(1);
580 }
581 else
582 add_text_to_macro(ppy_text, ppy_leng);
583 }
584 <pp_macscan>, {
585 if(MACROPARENTHESES() > 1)
586 add_text_to_macro(ppy_text, ppy_leng);
587 else
588 macro_add_arg(0);
589 }
590 <pp_macscan>\" new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
591 <pp_macscan>\' new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
592 <pp_macscan>"/*" yy_push_state(pp_comment); add_text_to_macro(" ", 1);
593 <pp_macscan>\n pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
594 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.) add_text_to_macro(ppy_text, ppy_leng);
595 <pp_macscan>\\\r?\n newline(0);
597 /*
598 * Comment handling (almost all start-conditions)
599 */
600 <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);
601 <pp_comment>[^*\n]*|"*"+[^*/\n]* ;
602 <pp_comment>\n newline(0);
603 <pp_comment>"*"+"/" yy_pop_state();
605 /*
606 * Remove C++ style comment (almost all start-conditions)
607 */
608 <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]* {
609 if(ppy_text[ppy_leng-1] == '\\')
610 ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
611 }
613 /*
614 * Single, double and <> quoted constants
615 */
616 <INITIAL,pp_macexp>\" pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
617 <INITIAL,pp_macexp>\' pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
618 <pp_dqs>[^"\\\n]+ add_string(ppy_text, ppy_leng);
619 <pp_dqs>\" {
620 add_string(ppy_text, ppy_leng);
621 yy_pop_state();
622 switch(yy_current_state())
623 {
624 case pp_pp:
625 case pp_define:
626 case pp_mbody:
627 case pp_inc:
628 case RCINCL:
629 if (yy_current_state()==RCINCL) yy_pop_state();
630 ppy_lval.cptr = get_string();
631 return tDQSTRING;
632 case pp_line:
633 ppy_lval.cptr = get_string();
634 return tDQSTRING;
635 default:
636 put_string();
637 }
638 }
639 <pp_sqs>[^'\\\n]+ add_string(ppy_text, ppy_leng);
640 <pp_sqs>\' {
641 add_string(ppy_text, ppy_leng);
642 yy_pop_state();
643 switch(yy_current_state())
644 {
645 case pp_if:
646 case pp_define:
647 case pp_mbody:
648 ppy_lval.cptr = get_string();
649 return tSQSTRING;
650 default:
651 put_string();
652 }
653 }
654 <pp_iqs>[^\>\\\n]+ add_string(ppy_text, ppy_leng);
655 <pp_iqs>\> {
656 add_string(ppy_text, ppy_leng);
657 yy_pop_state();
658 ppy_lval.cptr = get_string();
659 return tIQSTRING;
660 }
661 <pp_dqs>\\\r?\n {
662 /*
663 * This is tricky; we need to remove the line-continuation
664 * from preprocessor strings, but OTOH retain them in all
665 * other strings. This is because the resource grammar is
666 * even more braindead than initially analysed and line-
667 * continuations in strings introduce, sigh, newlines in
668 * the output. There goes the concept of non-breaking, non-
669 * spacing whitespace.
670 */
671 switch(yy_top_state())
672 {
673 case pp_pp:
674 case pp_define:
675 case pp_mbody:
676 case pp_inc:
677 case pp_line:
678 newline(0);
679 break;
680 default:
681 add_string(ppy_text, ppy_leng);
682 newline(-1);
683 }
684 }
685 <pp_iqs,pp_dqs,pp_sqs>\\. add_string(ppy_text, ppy_leng);
686 <pp_iqs,pp_dqs,pp_sqs>\n {
687 newline(1);
688 add_string(ppy_text, ppy_leng);
689 ppy_warning("Newline in string constant encountered (started line %d)", string_start());
690 }
692 /*
693 * Identifier scanning
694 */
695 <INITIAL,pp_if,pp_inc,pp_macexp>{cident} {
696 pp_entry_t *ppp;
697 pp_incl_state.seen_junk++;
698 if(!(ppp = pplookup(ppy_text)))
699 {
700 if(yy_current_state() == pp_inc)
701 ppy_error("Expected include filename");
703 else if(yy_current_state() == pp_if)
704 {
705 ppy_lval.cptr = pp_xstrdup(ppy_text);
706 return tIDENT;
707 }
708 else {
709 if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
710 yy_push_state(RCINCL);
711 return tRCINCLUDE;
712 }
713 else put_buffer(ppy_text, ppy_leng);
714 }
715 }
716 else if(!ppp->expanding)
717 {
718 switch(ppp->type)
719 {
720 case def_special:
721 expand_special(ppp);
722 break;
723 case def_define:
724 expand_define(ppp);
725 break;
726 case def_macro:
727 yy_push_state(pp_macign);
728 push_macro(ppp);
729 break;
730 default:
731 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
732 }
733 }
734 else put_buffer(ppy_text, ppy_leng);
735 }
737 /*
738 * Everything else that needs to be passed and
739 * newline and continuation handling
740 */
741 <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);
742 <INITIAL,pp_macexp>{ws}+ put_buffer(ppy_text, ppy_leng);
743 <INITIAL>\n newline(1);
744 <INITIAL>\\\r?\n newline(0);
745 <INITIAL>\\\r? pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
747 /*
748 * Special catcher for macro argmument expansion to prevent
749 * newlines to propagate to the output or admin.
750 */
751 <pp_macexp>(\n)|(.)|(\\\r?(\n|.)) put_buffer(ppy_text, ppy_leng);
753 <RCINCL>[A-Za-z0-9_\.\\/]+ {
754 ppy_lval.cptr=pp_xstrdup(ppy_text);
755 yy_pop_state();
756 return tRCINCLUDEPATH;
757 }
759 <RCINCL>{ws}+ ;
761 <RCINCL>\" {
762 new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
763 }
765 /*
766 * This is a 'catch-all' rule to discover errors in the scanner
767 * in an orderly manner.
768 */
769 <*>. pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
771 <<EOF>> {
772 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
773 bufferstackentry_t *bep = pop_buffer();
775 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
776 ppy_warning("Unmatched #if/#endif at end of file");
778 if(!bep)
779 {
780 if(YY_START != INITIAL)
781 {
782 ppy_error("Unexpected end of file during preprocessing");
783 BEGIN(INITIAL);
784 }
785 yyterminate();
786 }
787 else if(bep->should_pop == 2)
788 {
789 macexpstackentry_t *mac;
790 mac = pop_macro();
791 expand_macro(mac);
792 }
793 ppy__delete_buffer(b);
794 }
796 %%
797 /*
798 **************************************************************************
799 * Support functions
800 **************************************************************************
801 */
803 #ifndef ppy_wrap
804 int ppy_wrap(void)
805 {
806 return 1;
807 }
808 #endif
811 /*
812 *-------------------------------------------------------------------------
813 * Output newlines or set them as continuations
814 *
815 * Input: -1 - Don't count this one, but update local position (see pp_dqs)
816 * 0 - Line-continuation seen and cache output
817 * 1 - Newline seen and flush output
818 *-------------------------------------------------------------------------
819 */
820 static void newline(int dowrite)
821 {
822 pp_status.line_number++;
823 pp_status.char_number = 1;
825 if(dowrite == -1)
826 return;
828 ncontinuations++;
829 if(dowrite)
830 {
831 for(;ncontinuations; ncontinuations--)
832 put_buffer("\n", 1);
833 }
834 }
837 /*
838 *-------------------------------------------------------------------------
839 * Make a number out of an any-base and suffixed string
840 *
841 * Possible number extensions:
842 * - "" int
843 * - "L" long int
844 * - "LL" long long int
845 * - "U" unsigned int
846 * - "UL" unsigned long int
847 * - "ULL" unsigned long long int
848 * - "LU" unsigned long int
849 * - "LLU" unsigned long long int
850 * - "LUL" invalid
851 *
852 * FIXME:
853 * The sizes of resulting 'int' and 'long' are compiler specific.
854 * I depend on sizeof(int) > 2 here (although a relatively safe
855 * assumption).
856 * Long longs are not yet implemented because this is very compiler
857 * specific and I don't want to think too much about the problems.
858 *
859 *-------------------------------------------------------------------------
860 */
861 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
862 {
863 int is_l = 0;
864 int is_ll = 0;
865 int is_u = 0;
866 char ext[4];
867 long l;
869 ext[3] = '\0';
870 ext[2] = toupper(str[len-1]);
871 ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
872 ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
874 if(!strcmp(ext, "LUL"))
875 {
876 ppy_error("Invalid constant suffix");
877 return 0;
878 }
879 else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
880 {
881 is_ll++;
882 is_u++;
883 }
884 else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
885 {
886 is_l++;
887 is_u++;
888 }
889 else if(!strcmp(ext+1, "LL"))
890 {
891 is_ll++;
892 }
893 else if(!strcmp(ext+2, "L"))
894 {
895 is_l++;
896 }
897 else if(!strcmp(ext+2, "U"))
898 {
899 is_u++;
900 }
902 if(is_u && is_ll)
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 if(!is_u && is_ll)
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 if(is_u && is_l)
919 {
920 errno = 0;
921 val->ulong = strtoul(str, NULL, radix);
922 if (val->ulong == ULONG_MAX && errno == ERANGE)
923 ppy_error("integer constant %s is too large\n", str);
924 return tULONG;
925 }
926 else if(!is_u && is_l)
927 {
928 errno = 0;
929 val->slong = strtol(str, NULL, radix);
930 if ((val->slong == LONG_MIN || val->slong == LONG_MAX) && errno == ERANGE)
931 ppy_error("integer constant %s is too large\n", str);
932 return tSLONG;
933 }
934 else if(is_u && !is_l)
935 {
936 unsigned long ul;
937 errno = 0;
938 ul = strtoul(str, NULL, radix);
939 if ((ul == ULONG_MAX && errno == ERANGE) || (ul > UINT_MAX))
940 ppy_error("integer constant %s is too large\n", str);
941 val->uint = (unsigned int)ul;
942 return tUINT;
943 }
945 /* Else it must be an int... */
946 errno = 0;
947 l = strtol(str, NULL, radix);
948 if (((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE) ||
949 (l > INT_MAX) || (l < INT_MIN))
950 ppy_error("integer constant %s is too large\n", str);
951 val->sint = (int)l;
952 return tSINT;
953 }
956 /*
957 *-------------------------------------------------------------------------
958 * Macro and define expansion support
959 *
960 * FIXME: Variable macro arguments.
961 *-------------------------------------------------------------------------
962 */
963 static void expand_special(pp_entry_t *ppp)
964 {
965 static char *buf = NULL;
966 char *new_buf;
968 assert(ppp->type == def_special);
970 if(!strcmp(ppp->ident, "__LINE__"))
971 {
972 new_buf = pp_xrealloc(buf, 32);
973 if(!new_buf)
974 return;
975 buf = new_buf;
976 sprintf(buf, "%d", pp_status.line_number);
977 }
978 else if(!strcmp(ppp->ident, "__FILE__"))
979 {
980 new_buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
981 if(!new_buf)
982 return;
983 buf = new_buf;
984 sprintf(buf, "\"%s\"", pp_status.input);
985 }
986 else
987 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
989 if(pp_flex_debug)
990 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
991 macexpstackidx,
992 pp_status.input,
993 pp_status.line_number,
994 ppp->ident,
995 buf ? buf : "");
997 if(buf && buf[0])
998 {
999 push_buffer(ppp, NULL, NULL, 0);
1000 yy_scan_string(buf);
1001 }
1002 }
1004 static void expand_define(pp_entry_t *ppp)
1005 {
1006 assert(ppp->type == def_define);
1008 if(pp_flex_debug)
1009 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
1010 macexpstackidx,
1011 pp_status.input,
1012 pp_status.line_number,
1013 ppp->ident,
1014 ppp->subst.text);
1015 if(ppp->subst.text && ppp->subst.text[0])
1016 {
1017 push_buffer(ppp, NULL, NULL, 0);
1018 yy_scan_string(ppp->subst.text);
1019 }
1020 }
1022 static int curdef_idx = 0;
1023 static int curdef_alloc = 0;
1024 static char *curdef_text = NULL;
1026 static void add_text(const char *str, int len)
1027 {
1028 int new_alloc;
1029 char *new_text;
1031 if(len == 0)
1032 return;
1033 if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
1034 {
1035 new_alloc = curdef_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1036 new_text = pp_xrealloc(curdef_text, new_alloc * sizeof(curdef_text[0]));
1037 if(!new_text)
1038 return;
1039 curdef_text = new_text;
1040 curdef_alloc = new_alloc;
1041 if(curdef_alloc > 65536)
1042 ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
1043 }
1044 memcpy(&curdef_text[curdef_idx], str, len);
1045 curdef_idx += len;
1046 }
1048 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
1049 {
1050 char *cptr;
1051 char *exp;
1052 int tag;
1053 int n;
1055 if(mtp == NULL)
1056 return NULL;
1058 switch(mtp->type)
1059 {
1060 case exp_text:
1061 if(pp_flex_debug)
1062 fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
1063 add_text(mtp->subst.text, strlen(mtp->subst.text));
1064 break;
1066 case exp_stringize:
1067 if(pp_flex_debug)
1068 fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
1069 mtp->subst.argidx,
1070 mep->args[mtp->subst.argidx]);
1071 cptr = mep->args[mtp->subst.argidx];
1072 add_text("\"", 1);
1073 while(*cptr)
1074 {
1075 if(*cptr == '"' || *cptr == '\\')
1076 add_text("\\", 1);
1077 add_text(cptr, 1);
1078 cptr++;
1079 }
1080 add_text("\"", 1);
1081 break;
1083 case exp_concat:
1084 if(pp_flex_debug)
1085 fprintf(stderr, "add_expand_text: exp_concat\n");
1086 /* Remove trailing whitespace from current expansion text */
1087 while(curdef_idx)
1088 {
1089 if(isspace(curdef_text[curdef_idx-1] & 0xff))
1090 curdef_idx--;
1091 else
1092 break;
1093 }
1094 /* tag current position and recursively expand the next part */
1095 tag = curdef_idx;
1096 mtp = add_expand_text(mtp->next, mep, nnl);
1098 /* Now get rid of the leading space of the expansion */
1099 cptr = &curdef_text[tag];
1100 n = curdef_idx - tag;
1101 while(n)
1102 {
1103 if(isspace(*cptr & 0xff))
1104 {
1105 cptr++;
1106 n--;
1107 }
1108 else
1109 break;
1110 }
1111 if(cptr != &curdef_text[tag])
1112 {
1113 memmove(&curdef_text[tag], cptr, n);
1114 curdef_idx -= (curdef_idx - tag) - n;
1115 }
1116 break;
1118 case exp_subst:
1119 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1120 exp = mep->args[mtp->subst.argidx];
1121 else
1122 exp = mep->ppargs[mtp->subst.argidx];
1123 if(exp)
1124 {
1125 add_text(exp, strlen(exp));
1126 *nnl -= mep->nnls[mtp->subst.argidx];
1127 cptr = strchr(exp, '\n');
1128 while(cptr)
1129 {
1130 *cptr = ' ';
1131 cptr = strchr(cptr+1, '\n');
1132 }
1133 mep->nnls[mtp->subst.argidx] = 0;
1134 }
1135 if(pp_flex_debug)
1136 fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1137 break;
1139 default:
1140 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1141 }
1142 return mtp;
1143 }
1145 static void expand_macro(macexpstackentry_t *mep)
1146 {
1147 mtext_t *mtp;
1148 int n, k;
1149 char *cptr;
1150 int nnl = 0;
1151 pp_entry_t *ppp = mep->ppp;
1152 int nargs = mep->nargs;
1154 assert(ppp->type == def_macro);
1155 assert(ppp->expanding == 0);
1157 if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1158 {
1159 ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1160 return;
1161 }
1163 for(n = 0; n < nargs; n++)
1164 nnl += mep->nnls[n];
1166 if(pp_flex_debug)
1167 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1168 macexpstackidx,
1169 pp_status.input,
1170 pp_status.line_number,
1171 ppp->ident,
1172 mep->nargs,
1173 nnl);
1175 curdef_idx = 0;
1177 for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1178 {
1179 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1180 break;
1181 }
1183 for(n = 0; n < nnl; n++)
1184 add_text("\n", 1);
1186 /* To make sure there is room and termination (see below) */
1187 add_text(" \0", 2);
1189 /* Strip trailing whitespace from expansion */
1190 for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1191 {
1192 if(!isspace(*cptr & 0xff))
1193 break;
1194 }
1196 /*
1197 * We must add *one* whitespace to make sure that there
1198 * is a token-separation after the expansion.
1199 */
1200 *(++cptr) = ' ';
1201 *(++cptr) = '\0';
1202 k++;
1204 /* Strip leading whitespace from expansion */
1205 for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1206 {
1207 if(!isspace(*cptr & 0xff))
1208 break;
1209 }
1211 if(k - n > 0)
1212 {
1213 if(pp_flex_debug)
1214 fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1215 push_buffer(ppp, NULL, NULL, 0);
1216 /*yy_scan_bytes(curdef_text + n, k - n);*/
1217 yy_scan_string(curdef_text + n);
1218 }
1219 }
1221 /*
1222 *-------------------------------------------------------------------------
1223 * String collection routines
1224 *-------------------------------------------------------------------------
1225 */
1226 static void new_string(void)
1227 {
1228 #ifdef DEBUG
1229 if(strbuf_idx)
1230 ppy_warning("new_string: strbuf_idx != 0");
1231 #endif
1232 strbuf_idx = 0;
1233 str_startline = pp_status.line_number;
1234 }
1236 static void add_string(const char *str, int len)
1237 {
1238 int new_alloc;
1239 char *new_buffer;
1241 if(len == 0)
1242 return;
1243 if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1244 {
1245 new_alloc = strbuf_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1246 new_buffer = pp_xrealloc(strbuffer, new_alloc * sizeof(strbuffer[0]));
1247 if(!new_buffer)
1248 return;
1249 strbuffer = new_buffer;
1250 strbuf_alloc = new_alloc;
1251 if(strbuf_alloc > 65536)
1252 ppy_warning("Reallocating string buffer larger than 64kB");
1253 }
1254 memcpy(&strbuffer[strbuf_idx], str, len);
1255 strbuf_idx += len;
1256 }
1258 static char *get_string(void)
1259 {
1260 char *str = pp_xmalloc(strbuf_idx + 1);
1261 if(!str)
1262 return NULL;
1263 memcpy(str, strbuffer, strbuf_idx);
1264 str[strbuf_idx] = '\0';
1265 #ifdef DEBUG
1266 strbuf_idx = 0;
1267 #endif
1268 return str;
1269 }
1271 static void put_string(void)
1272 {
1273 put_buffer(strbuffer, strbuf_idx);
1274 #ifdef DEBUG
1275 strbuf_idx = 0;
1276 #endif
1277 }
1279 static int string_start(void)
1280 {
1281 return str_startline;
1282 }
1285 /*
1286 *-------------------------------------------------------------------------
1287 * Buffer management
1288 *-------------------------------------------------------------------------
1289 */
1290 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1291 {
1292 if(ppy_debug)
1293 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1294 if(bufferstackidx >= MAXBUFFERSTACK)
1295 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1297 memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1298 bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1299 bufferstack[bufferstackidx].filehandle = pp_status.file;
1300 bufferstack[bufferstackidx].define = ppp;
1301 bufferstack[bufferstackidx].line_number = pp_status.line_number;
1302 bufferstack[bufferstackidx].char_number = pp_status.char_number;
1303 bufferstack[bufferstackidx].if_depth = pp_get_if_depth();
1304 bufferstack[bufferstackidx].should_pop = pop;
1305 bufferstack[bufferstackidx].filename = pp_status.input;
1306 bufferstack[bufferstackidx].ncontinuations = ncontinuations;
1307 bufferstack[bufferstackidx].incl = pp_incl_state;
1308 bufferstack[bufferstackidx].include_filename = incname;
1310 if(ppp)
1311 ppp->expanding = 1;
1312 else if(filename)
1313 {
1314 /* These will track the ppy_error to the correct file and line */
1315 pp_status.line_number = 1;
1316 pp_status.char_number = 1;
1317 pp_status.input = filename;
1318 ncontinuations = 0;
1319 }
1320 else if(!pop)
1321 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1322 bufferstackidx++;
1323 }
1325 static bufferstackentry_t *pop_buffer(void)
1326 {
1327 if(bufferstackidx < 0)
1328 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1330 if(bufferstackidx == 0)
1331 return NULL;
1333 bufferstackidx--;
1335 if(bufferstack[bufferstackidx].define)
1336 bufferstack[bufferstackidx].define->expanding = 0;
1337 else
1338 {
1339 includelogicentry_t *iep = NULL;
1341 if(!bufferstack[bufferstackidx].should_pop)
1342 {
1343 fclose(pp_status.file);
1344 pp_writestring("# %d \"%s\" 2\n", bufferstack[bufferstackidx].line_number, bufferstack[bufferstackidx].filename);
1346 /* We have EOF, check the include logic */
1347 if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1348 {
1349 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1350 if(ppp)
1351 {
1352 iep = pp_xmalloc(sizeof(includelogicentry_t));
1353 if (iep)
1354 {
1355 iep->ppp = ppp;
1356 ppp->iep = iep;
1357 iep->filename = bufferstack[bufferstackidx].include_filename;
1358 iep->prev = NULL;
1359 iep->next = pp_includelogiclist;
1360 if(iep->next)
1361 iep->next->prev = iep;
1362 pp_includelogiclist = iep;
1363 if(pp_status.debug)
1364 fprintf(stderr, "pop_buffer: %s:%d: includelogic added, include_ppp='%s', file='%s'\n",
1365 bufferstack[bufferstackidx].filename, bufferstack[bufferstackidx].line_number, pp_incl_state.ppp, iep->filename);
1366 }
1367 }
1368 }
1369 free(pp_incl_state.ppp);
1370 pp_incl_state = bufferstack[bufferstackidx].incl;
1372 }
1373 if (bufferstack[bufferstackidx].include_filename)
1374 {
1375 free(pp_status.input);
1376 pp_status.input = bufferstack[bufferstackidx].filename;
1377 }
1378 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1379 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1380 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1381 if (!iep)
1382 free(bufferstack[bufferstackidx].include_filename);
1383 }
1385 if(ppy_debug)
1386 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1387 bufferstackidx,
1388 bufferstack[bufferstackidx].bufferstate,
1389 bufferstack[bufferstackidx].define,
1390 bufferstack[bufferstackidx].line_number,
1391 bufferstack[bufferstackidx].char_number,
1392 bufferstack[bufferstackidx].if_depth,
1393 bufferstack[bufferstackidx].filename,
1394 bufferstack[bufferstackidx].should_pop);
1396 pp_status.file = bufferstack[bufferstackidx].filehandle;
1397 ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1399 if(bufferstack[bufferstackidx].should_pop)
1400 {
1401 if(yy_current_state() == pp_macexp)
1402 macro_add_expansion();
1403 else
1404 pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1405 yy_pop_state();
1406 }
1408 return &bufferstack[bufferstackidx];
1409 }
1412 /*
1413 *-------------------------------------------------------------------------
1414 * Macro nestng support
1415 *-------------------------------------------------------------------------
1416 */
1417 static void push_macro(pp_entry_t *ppp)
1418 {
1419 if(macexpstackidx >= MAXMACEXPSTACK)
1420 {
1421 ppy_error("Too many nested macros");
1422 return;
1423 }
1425 macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1426 if(!macexpstack[macexpstackidx])
1427 return;
1428 memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1429 macexpstack[macexpstackidx]->ppp = ppp;
1430 macexpstackidx++;
1431 }
1433 static macexpstackentry_t *top_macro(void)
1434 {
1435 return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1436 }
1438 static macexpstackentry_t *pop_macro(void)
1439 {
1440 if(macexpstackidx <= 0)
1441 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1442 return macexpstack[--macexpstackidx];
1443 }
1445 static void free_macro(macexpstackentry_t *mep)
1446 {
1447 int i;
1449 for(i = 0; i < mep->nargs; i++)
1450 free(mep->args[i]);
1451 free(mep->args);
1452 free(mep->nnls);
1453 free(mep->curarg);
1454 free(mep);
1455 }
1457 static void add_text_to_macro(const char *text, int len)
1458 {
1459 macexpstackentry_t *mep = top_macro();
1461 assert(mep->ppp->expanding == 0);
1463 if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1464 {
1465 char *new_curarg;
1466 int new_alloc = mep->curargalloc + ((ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1);
1467 new_curarg = pp_xrealloc(mep->curarg, new_alloc * sizeof(mep->curarg[0]));
1468 if(!new_curarg)
1469 return;
1470 mep->curarg = new_curarg;
1471 mep->curargalloc = new_alloc;
1472 }
1473 memcpy(mep->curarg + mep->curargsize, text, len);
1474 mep->curargsize += len;
1475 mep->curarg[mep->curargsize] = '\0';
1476 }
1478 static void macro_add_arg(int last)
1479 {
1480 int nnl = 0;
1481 char *cptr;
1482 char **new_args, **new_ppargs;
1483 int *new_nnls;
1484 macexpstackentry_t *mep = top_macro();
1486 assert(mep->ppp->expanding == 0);
1488 new_args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1489 if(!new_args)
1490 return;
1491 mep->args = new_args;
1493 new_ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1494 if(!new_ppargs)
1495 return;
1496 mep->ppargs = new_ppargs;
1498 new_nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1499 if(!new_nnls)
1500 return;
1501 mep->nnls = new_nnls;
1503 mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1504 if(!mep->args[mep->nargs])
1505 return;
1506 cptr = mep->args[mep->nargs]-1;
1507 while((cptr = strchr(cptr+1, '\n')))
1508 {
1509 nnl++;
1510 }
1511 mep->nnls[mep->nargs] = nnl;
1512 mep->nargs++;
1513 free(mep->curarg);
1514 mep->curargalloc = mep->curargsize = 0;
1515 mep->curarg = NULL;
1517 if(pp_flex_debug)
1518 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1519 pp_status.input,
1520 pp_status.line_number,
1521 mep->nargs-1,
1522 mep->args[mep->nargs-1]);
1524 /* Each macro argument must be expanded to cope with stingize */
1525 if(last || mep->args[mep->nargs-1][0])
1526 {
1527 yy_push_state(pp_macexp);
1528 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1529 yy_scan_string(mep->args[mep->nargs-1]);
1530 /*mep->bufferstackidx = bufferstackidx; But not nested! */
1531 }
1532 }
1534 static void macro_add_expansion(void)
1535 {
1536 macexpstackentry_t *mep = top_macro();
1538 assert(mep->ppp->expanding == 0);
1540 mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1541 free(mep->curarg);
1542 mep->curargalloc = mep->curargsize = 0;
1543 mep->curarg = NULL;
1545 if(pp_flex_debug)
1546 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1547 pp_status.input,
1548 pp_status.line_number,
1549 mep->nargs-1,
1550 mep->ppargs[mep->nargs-1] ? mep->ppargs[mep->nargs-1] : "");
1551 }
1554 /*
1555 *-------------------------------------------------------------------------
1556 * Output management
1557 *-------------------------------------------------------------------------
1558 */
1559 static void put_buffer(const char *s, int len)
1560 {
1561 if(top_macro())
1562 add_text_to_macro(s, len);
1563 else
1564 fwrite(s, 1, len, ppy_out);
1565 }
1568 /*
1569 *-------------------------------------------------------------------------
1570 * Include management
1571 *-------------------------------------------------------------------------
1572 */
1573 void pp_do_include(char *fname, int type)
1574 {
1575 char *newpath;
1576 int n;
1577 includelogicentry_t *iep;
1578 void *fp;
1580 if(!fname)
1581 return;
1583 for(iep = pp_includelogiclist; iep; iep = iep->next)
1584 {
1585 if(!strcmp(iep->filename, fname))
1586 {
1587 /*
1588 * We are done. The file was included before.
1589 * If the define was deleted, then this entry would have
1590 * been deleted too.
1591 */
1592 free(fname);
1593 return;
1594 }
1595 }
1597 n = strlen(fname);
1599 if(n <= 2)
1600 {
1601 ppy_error("Empty include filename");
1602 free(fname);
1603 return;
1604 }
1606 /* Undo the effect of the quotation */
1607 fname[n-1] = '\0';
1609 if((fp = pp_open_include(fname+1, type, pp_status.input, &newpath)) == NULL)
1610 {
1611 ppy_error("Unable to open include file %s", fname+1);
1612 free(fname);
1613 return;
1614 }
1616 fname[n-1] = *fname; /* Redo the quotes */
1617 push_buffer(NULL, newpath, fname, 0);
1618 pp_incl_state.seen_junk = 0;
1619 pp_incl_state.state = 0;
1620 pp_incl_state.ppp = NULL;
1622 if(pp_status.debug)
1623 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ifdepth=%d\n",
1624 pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ifdepth);
1625 pp_status.file = fp;
1626 ppy__switch_to_buffer(ppy__create_buffer(NULL, YY_BUF_SIZE));
1628 pp_writestring("# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1629 }
1631 /*
1632 *-------------------------------------------------------------------------
1633 * Push/pop preprocessor ignore state when processing conditionals
1634 * which are false.
1635 *-------------------------------------------------------------------------
1636 */
1637 void pp_push_ignore_state(void)
1638 {
1639 yy_push_state(pp_ignore);
1640 }
1642 void pp_pop_ignore_state(void)
1643 {
1644 yy_pop_state();
1645 }