user32: Disable assert() for the mingw build since mingw gets confused trying to...
[wine.git] / libs / wpp / ppl.l
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1 /* -*-C-*-
2  * Wrc preprocessor lexical analysis
3  *
4  * Copyright 1999-2000  Bertho A. Stultiens (BS)
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19  *
20  * History:
21  * 24-Apr-2000 BS       - Started from scratch to restructure everything
22  *                        and reintegrate the source into the wine-tree.
23  * 04-Jan-2000 BS       - Added comments about the lexicographical
24  *                        grammar to give some insight in the complexity.
25  * 28-Dec-1999 BS       - Eliminated backing-up of the flexer by running
26  *                        `flex -b' on the source. This results in some
27  *                        weirdo extra rules, but a much faster scanner.
28  * 23-Dec-1999 BS       - Started this file
29  *
30  *-------------------------------------------------------------------------
31  * The preprocessor's lexographical grammar (approximately):
32  *
33  * pp           := {ws} # {ws} if {ws} {expr} {ws} \n
34  *              |  {ws} # {ws} ifdef {ws} {id} {ws} \n
35  *              |  {ws} # {ws} ifndef {ws} {id} {ws} \n
36  *              |  {ws} # {ws} elif {ws} {expr} {ws} \n
37  *              |  {ws} # {ws} else {ws} \n
38  *              |  {ws} # {ws} endif {ws} \n
39  *              |  {ws} # {ws} include {ws} < {anytext} > \n
40  *              |  {ws} # {ws} include {ws} " {anytext} " \n
41  *              |  {ws} # {ws} define {ws} {anytext} \n
42  *              |  {ws} # {ws} define( {arglist} ) {ws} {expansion} \n
43  *              |  {ws} # {ws} pragma {ws} {anytext} \n
44  *              |  {ws} # {ws} ident {ws} {anytext} \n
45  *              |  {ws} # {ws} error {ws} {anytext} \n
46  *              |  {ws} # {ws} warning {ws} {anytext} \n
47  *              |  {ws} # {ws} line {ws} " {anytext} " {number} \n
48  *              |  {ws} # {ws} {number} " {anytext} " {number} [ {number} [{number}] ] \n
49  *              |  {ws} # {ws} \n
50  *
51  * ws           := [ \t\r\f\v]*
52  *
53  * expr         := {expr} [+-*%^/|&] {expr}
54  *              |  {expr} {logor|logand} {expr}
55  *              |  [!~+-] {expr}
56  *              |  {expr} ? {expr} : {expr}
57  *
58  * logor        := ||
59  *
60  * logand       := &&
61  *
62  * id           := [a-zA-Z_][a-zA-Z0-9_]*
63  *
64  * anytext      := [^\n]*       (see note)
65  *
66  * arglist      :=
67  *              |  {id}
68  *              |  {arglist} , {id}
69  *              |  {arglist} , {id} ...
70  *
71  * expansion    := {id}
72  *              |  # {id}
73  *              |  {anytext}
74  *              |  {anytext} ## {anytext}
75  *
76  * number       := [0-9]+
77  *
78  * Note: "anytext" is not always "[^\n]*". This is because the
79  *       trailing context must be considered as well.
80  *
81  * The only certain assumption for the preprocessor to make is that
82  * directives start at the beginning of the line, followed by a '#'
83  * and end with a newline.
84  * Any directive may be suffixed with a line-continuation. Also
85  * classical comment / *...* / (note: no comments within comments,
86  * therefore spaces) is considered to be a line-continuation
87  * (according to gcc and egcs AFAIK, ANSI is a bit vague).
88  * Comments have not been added to the above grammar for simplicity
89  * reasons. However, it is allowed to enter comment anywhere within
90  * the directives as long as they do not interfere with the context.
91  * All comments are considered to be deletable whitespace (both
92  * classical form "/ *...* /" and C++ form "//...\n").
93  *
94  * All recursive scans, except for macro-expansion, are done by the
95  * parser, whereas the simple state transitions of non-recursive
96  * directives are done in the scanner. This results in the many
97  * exclusive start-conditions of the scanner.
98  *
99  * Macro expansions are slightly more difficult because they have to
100  * prescan the arguments. Parameter substitution is literal if the
101  * substitution is # or ## (either side). This enables new identifiers
102  * to be created (see 'info cpp' node Macro|Pitfalls|Prescan for more
103  * information).
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).
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.
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.
122  */
125  * Special flex options and exclusive scanner start-conditions
126  */
127 %option stack
128 %option 8bit never-interactive
129 %option noinput nounput
130 %option prefix="ppy_"
132 %x pp_pp
133 %x pp_eol
134 %x pp_inc
135 %x pp_dqs
136 %x pp_sqs
137 %x pp_iqs
138 %x pp_comment
139 %x pp_def
140 %x pp_define
141 %x pp_macro
142 %x pp_mbody
143 %x pp_macign
144 %x pp_macscan
145 %x pp_macexp
146 %x pp_if
147 %x pp_ifd
148 %x pp_endif
149 %x pp_line
150 %x pp_defined
151 %x pp_ignore
152 %x RCINCL
154 ws      [ \v\f\t\r]
155 cident  [a-zA-Z_][0-9a-zA-Z_]*
156 ul      [uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
159 #include "config.h"
160 #include "wine/port.h"
161 #include <stdio.h>
162 #include <stdlib.h>
163 #include <string.h>
164 #include <ctype.h>
165 #include <assert.h>
166 #include <errno.h>
167 #include <limits.h>
169 #ifndef LLONG_MAX
170 # define LLONG_MAX  ((long long)0x7fffffff << 32 | 0xffffffff)
171 # define LLONG_MIN  (-LLONG_MAX - 1)
172 #endif
173 #ifndef ULLONG_MAX
174 # define ULLONG_MAX ((long long)0xffffffff << 32 | 0xffffffff)
175 #endif
177 #ifndef HAVE_UNISTD_H
178 #define YY_NO_UNISTD_H
179 #endif
181 #include "wpp_private.h"
182 #include "ppy.tab.h"
185  * Make sure that we are running an appropriate version of flex.
186  */
187 #if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
188 #error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
189 #endif
191 #define YY_READ_BUF_SIZE        65536           /* So we read most of a file at once */
193 #define yy_current_state()      YY_START
194 #define yy_pp_state(x)          yy_pop_state(); yy_push_state(x)
197  * Always update the current character position within a line
198  */
199 #define YY_USER_ACTION  pp_status.char_number+=ppy_leng;
202  * Buffer management for includes and expansions
203  */
204 #define MAXBUFFERSTACK  128     /* Nesting more than 128 includes or macro expansion textss is insane */
206 typedef struct bufferstackentry {
207         YY_BUFFER_STATE bufferstate;    /* Buffer to switch back to */
208         pp_entry_t      *define;        /* Points to expanding define or NULL if handling includes */
209         int             line_number;    /* Line that we were handling */
210         int             char_number;    /* The current position on that line */
211         const char      *filename;      /* Filename that we were handling */
212         int             if_depth;       /* How many #if:s deep to check matching #endif:s */
213         int             ncontinuations; /* Remember the continuation state */
214         int             should_pop;     /* Set if we must pop the start-state on EOF */
215         /* Include management */
216         include_state_t incl;
217         char            *include_filename;
218 } bufferstackentry_t;
220 #define ALLOCBLOCKSIZE  (1 << 10)       /* Allocate these chunks at a time for string-buffers */
223  * Macro expansion nesting
224  * We need the stack to handle expansions while scanning
225  * a macro's arguments. The TOS must always be the macro
226  * that receives the current expansion from the scanner.
227  */
228 #define MAXMACEXPSTACK  128     /* Nesting more than 128 macro expansions is insane */
230 typedef struct macexpstackentry {
231         pp_entry_t      *ppp;           /* This macro we are scanning */
232         char            **args;         /* With these arguments */
233         char            **ppargs;       /* Resulting in these preprocessed arguments */
234         int             *nnls;          /* Number of newlines per argument */
235         int             nargs;          /* And this many arguments scanned */
236         int             parentheses;    /* Nesting level of () */
237         int             curargsize;     /* Current scanning argument's size */
238         int             curargalloc;    /* Current scanning argument's block allocated */
239         char            *curarg;        /* Current scanning argument's content */
240 } macexpstackentry_t;
242 #define MACROPARENTHESES()      (top_macro()->parentheses)
245  * Prototypes
246  */
247 static void newline(int);
248 static int make_number(int radix, YYSTYPE *val, const char *str, int len);
249 static void put_buffer(const char *s, int len);
250 /* Buffer management */
251 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
252 static bufferstackentry_t *pop_buffer(void);
253 /* String functions */
254 static void new_string(void);
255 static void add_string(const char *str, int len);
256 static char *get_string(void);
257 static void put_string(void);
258 static int string_start(void);
259 /* Macro functions */
260 static void push_macro(pp_entry_t *ppp);
261 static macexpstackentry_t *top_macro(void);
262 static macexpstackentry_t *pop_macro(void);
263 static void free_macro(macexpstackentry_t *mep);
264 static void add_text_to_macro(const char *text, int len);
265 static void macro_add_arg(int last);
266 static void macro_add_expansion(void);
267 /* Expansion */
268 static void expand_special(pp_entry_t *ppp);
269 static void expand_define(pp_entry_t *ppp);
270 static void expand_macro(macexpstackentry_t *mep);
273  * Local variables
274  */
275 static int ncontinuations;
277 static int strbuf_idx = 0;
278 static int strbuf_alloc = 0;
279 static char *strbuffer = NULL;
280 static int str_startline;
282 static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
283 static int macexpstackidx = 0;
285 static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
286 static int bufferstackidx = 0;
289  * Global variables
290  */
291 include_state_t pp_incl_state =
293     -1,    /* state */
294     NULL,  /* ppp */
295     0,     /* ifdepth */
296     0      /* seen_junk */
299 includelogicentry_t *pp_includelogiclist = NULL;
304  **************************************************************************
305  * The scanner starts here
306  **************************************************************************
307  */
310         /*
311          * Catch line-continuations.
312          * Note: Gcc keeps the line-continuations in, for example, strings
313          * intact. However, I prefer to remove them all so that the next
314          * scanner will not need to reduce the continuation state.
315          *
316          * <*>\\\n              newline(0);
317          */
319         /*
320          * Detect the leading # of a preprocessor directive.
321          */
322 <INITIAL,pp_ignore>^{ws}*#      pp_incl_state.seen_junk++; yy_push_state(pp_pp);
324         /*
325          * Scan for the preprocessor directives
326          */
327 <pp_pp>{ws}*include{ws}*        if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
328 <pp_pp>{ws}*define{ws}*         yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
329 <pp_pp>{ws}*error{ws}*          yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tERROR;
330 <pp_pp>{ws}*warning{ws}*        yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tWARNING;
331 <pp_pp>{ws}*pragma{ws}*         yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tPRAGMA;
332 <pp_pp>{ws}*ident{ws}*          yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tPPIDENT;
333 <pp_pp>{ws}*undef{ws}*          if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
334 <pp_pp>{ws}*ifdef{ws}*          yy_pp_state(pp_ifd);    return tIFDEF;
335 <pp_pp>{ws}*ifndef{ws}*         pp_incl_state.seen_junk--; yy_pp_state(pp_ifd); return tIFNDEF;
336 <pp_pp>{ws}*if{ws}*             yy_pp_state(pp_if);     return tIF;
337 <pp_pp>{ws}*elif{ws}*           yy_pp_state(pp_if);     return tELIF;
338 <pp_pp>{ws}*else{ws}*           yy_pp_state(pp_endif);  return tELSE;
339 <pp_pp>{ws}*endif{ws}*          yy_pp_state(pp_endif);  return tENDIF;
340 <pp_pp>{ws}*line{ws}*           if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
341 <pp_pp>{ws}+                    if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
342 <pp_pp>{ws}*[a-z]+              ppy_error("Invalid preprocessor token '%s'", ppy_text);
343 <pp_pp>\r?\n                    newline(1); yy_pop_state(); return tNL; /* This could be the null-token */
344 <pp_pp>\\\r?\n                  newline(0);
345 <pp_pp>\\\r?                    ppy_error("Preprocessor junk '%s'", ppy_text);
346 <pp_pp>.                        return *ppy_text;
348         /*
349          * Handle #include and #line
350          */
351 <pp_line>[0-9]+                 return make_number(10, &ppy_lval, ppy_text, ppy_leng);
352 <pp_inc>\<                      new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
353 <pp_inc,pp_line>\"              new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
354 <pp_inc,pp_line>{ws}+           ;
355 <pp_inc,pp_line>\n              newline(1); yy_pop_state(); return tNL;
356 <pp_inc,pp_line>\\\r?\n         newline(0);
357 <pp_inc,pp_line>(\\\r?)|(.)     ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
359         /*
360          * Ignore all input when a false clause is parsed
361          */
362 <pp_ignore>[^#/\\\n]+           ;
363 <pp_ignore>\n                   newline(1);
364 <pp_ignore>\\\r?\n              newline(0);
365 <pp_ignore>(\\\r?)|(.)          ;
367         /*
368          * Handle #if and #elif.
369          * These require conditionals to be evaluated, but we do not
370          * want to jam the scanner normally when we see these tokens.
371          * Note: tIDENT is handled below.
372          */
374 <pp_if>0[0-7]*{ul}?             return make_number(8, &ppy_lval, ppy_text, ppy_leng);
375 <pp_if>0[0-7]*[8-9]+{ul}?       ppy_error("Invalid octal digit");
376 <pp_if>[1-9][0-9]*{ul}?         return make_number(10, &ppy_lval, ppy_text, ppy_leng);
377 <pp_if>0[xX][0-9a-fA-F]+{ul}?   return make_number(16, &ppy_lval, ppy_text, ppy_leng);
378 <pp_if>0[xX]                    ppy_error("Invalid hex number");
379 <pp_if>defined                  yy_push_state(pp_defined); return tDEFINED;
380 <pp_if>"<<"                     return tLSHIFT;
381 <pp_if>">>"                     return tRSHIFT;
382 <pp_if>"&&"                     return tLOGAND;
383 <pp_if>"||"                     return tLOGOR;
384 <pp_if>"=="                     return tEQ;
385 <pp_if>"!="                     return tNE;
386 <pp_if>"<="                     return tLTE;
387 <pp_if>">="                     return tGTE;
388 <pp_if>\n                       newline(1); yy_pop_state(); return tNL;
389 <pp_if>\\\r?\n                  newline(0);
390 <pp_if>\\\r?                    ppy_error("Junk in conditional expression");
391 <pp_if>{ws}+                    ;
392 <pp_if>\'                       new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
393 <pp_if>\"                       ppy_error("String constants not allowed in conditionals");
394 <pp_if>.                        return *ppy_text;
396         /*
397          * Handle #ifdef, #ifndef and #undef
398          * to get only an untranslated/unexpanded identifier
399          */
400 <pp_ifd>{cident}        ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
401 <pp_ifd>{ws}+           ;
402 <pp_ifd>\n              newline(1); yy_pop_state(); return tNL;
403 <pp_ifd>\\\r?\n         newline(0);
404 <pp_ifd>(\\\r?)|(.)     ppy_error("Identifier expected");
406         /*
407          * Handle #else and #endif.
408          */
409 <pp_endif>{ws}+         ;
410 <pp_endif>\n            newline(1); yy_pop_state(); return tNL;
411 <pp_endif>\\\r?\n       newline(0);
412 <pp_endif>.             ppy_error("Garbage after #else or #endif.");
414         /*
415          * Handle the special 'defined' keyword.
416          * This is necessary to get the identifier prior to any
417          * substitutions.
418          */
419 <pp_defined>{cident}            yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
420 <pp_defined>{ws}+               ;
421 <pp_defined>(\()|(\))           return *ppy_text;
422 <pp_defined>\\\r?\n             newline(0);
423 <pp_defined>(\\.)|(\n)|(.)      ppy_error("Identifier expected");
425         /*
426          * Handle #error, #warning, #pragma and #ident.
427          * Pass everything literally to the parser, which
428          * will act appropriately.
429          * Comments are stripped from the literal text.
430          */
431 <pp_eol>[^/\\\n]+               if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
432 <pp_eol>\/[^/\\\n*]*            if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
433 <pp_eol>(\\\r?)|(\/[^/*])       if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
434 <pp_eol>\n                      newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
435 <pp_eol>\\\r?\n                 newline(0);
437         /*
438          * Handle left side of #define
439          */
440 <pp_def>{cident}\(              ppy_lval.cptr = pp_xstrdup(ppy_text); ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro);  return tMACRO;
441 <pp_def>{cident}                ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
442 <pp_def>{ws}+                   ;
443 <pp_def>\\\r?\n                 newline(0);
444 <pp_def>(\\\r?)|(\n)|(.)        perror("Identifier expected");
446         /*
447          * Scan the substitution of a define
448          */
449 <pp_define>[^'"/\\\n]+          ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
450 <pp_define>(\\\r?)|(\/[^/*])    ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
451 <pp_define>\\\r?\n{ws}+         newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
452 <pp_define>\\\r?\n              newline(0);
453 <pp_define>\n                   newline(1); yy_pop_state(); return tNL;
454 <pp_define>\'                   new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
455 <pp_define>\"                   new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
457         /*
458          * Scan the definition macro arguments
459          */
460 <pp_macro>\){ws}*               yy_pp_state(pp_mbody); return tMACROEND;
461 <pp_macro>{ws}+                 ;
462 <pp_macro>{cident}              ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
463 <pp_macro>,                     return ',';
464 <pp_macro>"..."                 return tELIPSIS;
465 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?)      ppy_error("Argument identifier expected");
466 <pp_macro>\\\r?\n               newline(0);
468         /*
469          * Scan the substitution of a macro
470          */
471 <pp_mbody>[^a-zA-Z0-9'"#/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
472 <pp_mbody>{cident}              ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
473 <pp_mbody>\#\#                  return tCONCAT;
474 <pp_mbody>\#                    return tSTRINGIZE;
475 <pp_mbody>[0-9][^'"#/\\\n]*     ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
476 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*)     ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
477 <pp_mbody>\\\r?\n{ws}+          newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
478 <pp_mbody>\\\r?\n               newline(0);
479 <pp_mbody>\n                    newline(1); yy_pop_state(); return tNL;
480 <pp_mbody>\'                    new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
481 <pp_mbody>\"                    new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
483         /*
484          * Macro expansion text scanning.
485          * This state is active just after the identifier is scanned
486          * that triggers an expansion. We *must* delete the leading
487          * whitespace before we can start scanning for arguments.
488          *
489          * If we do not see a '(' as next trailing token, then we have
490          * a false alarm. We just continue with a nose-bleed...
491          */
492 <pp_macign>{ws}*/\(     yy_pp_state(pp_macscan);
493 <pp_macign>{ws}*\n      {
494                 if(yy_top_state() != pp_macscan)
495                         newline(0);
496         }
497 <pp_macign>{ws}*\\\r?\n newline(0);
498 <pp_macign>{ws}+|{ws}*\\\r?|.   {
499                 macexpstackentry_t *mac = pop_macro();
500                 yy_pop_state();
501                 put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
502                 put_buffer(ppy_text, ppy_leng);
503                 free_macro(mac);
504         }
506         /*
507          * Macro expansion argument text scanning.
508          * This state is active when a macro's arguments are being read for expansion.
509          */
510 <pp_macscan>\(  {
511                 if(++MACROPARENTHESES() > 1)
512                         add_text_to_macro(ppy_text, ppy_leng);
513         }
514 <pp_macscan>\)  {
515                 if(--MACROPARENTHESES() == 0)
516                 {
517                         yy_pop_state();
518                         macro_add_arg(1);
519                 }
520                 else
521                         add_text_to_macro(ppy_text, ppy_leng);
522         }
523 <pp_macscan>,           {
524                 if(MACROPARENTHESES() > 1)
525                         add_text_to_macro(ppy_text, ppy_leng);
526                 else
527                         macro_add_arg(0);
528         }
529 <pp_macscan>\"          new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
530 <pp_macscan>\'          new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
531 <pp_macscan>"/*"        yy_push_state(pp_comment); add_text_to_macro(" ", 1);
532 <pp_macscan>\n          pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
533 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.)    add_text_to_macro(ppy_text, ppy_leng);
534 <pp_macscan>\\\r?\n     newline(0);
536         /*
537          * Comment handling (almost all start-conditions)
538          */
539 <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);
540 <pp_comment>[^*\n]*|"*"+[^*/\n]*        ;
541 <pp_comment>\n                          newline(0);
542 <pp_comment>"*"+"/"                     yy_pop_state();
544         /*
545          * Remove C++ style comment (almost all start-conditions)
546          */
547 <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]* {
548                 if(ppy_text[ppy_leng-1] == '\\')
549                         ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
550         }
552         /*
553          * Single, double and <> quoted constants
554          */
555 <INITIAL,pp_macexp>\"           pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
556 <INITIAL,pp_macexp>\'           pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
557 <pp_dqs>[^"\\\n]+               add_string(ppy_text, ppy_leng);
558 <pp_dqs>\"                      {
559                 add_string(ppy_text, ppy_leng);
560                 yy_pop_state();
561                 switch(yy_current_state())
562                 {
563                 case pp_pp:
564                 case pp_define:
565                 case pp_mbody:
566                 case pp_inc:
567                 case RCINCL:
568                         if (yy_current_state()==RCINCL) yy_pop_state();
569                         ppy_lval.cptr = get_string();
570                         return tDQSTRING;
571                 case pp_line:
572                         ppy_lval.cptr = get_string();
573                         return tDQSTRING;
574                 default:
575                         put_string();
576                 }
577         }
578 <pp_sqs>[^'\\\n]+               add_string(ppy_text, ppy_leng);
579 <pp_sqs>\'                      {
580                 add_string(ppy_text, ppy_leng);
581                 yy_pop_state();
582                 switch(yy_current_state())
583                 {
584                 case pp_if:
585                 case pp_define:
586                 case pp_mbody:
587                         ppy_lval.cptr = get_string();
588                         return tSQSTRING;
589                 default:
590                         put_string();
591                 }
592         }
593 <pp_iqs>[^\>\\\n]+              add_string(ppy_text, ppy_leng);
594 <pp_iqs>\>                      {
595                 add_string(ppy_text, ppy_leng);
596                 yy_pop_state();
597                 ppy_lval.cptr = get_string();
598                 return tIQSTRING;
599         }
600 <pp_dqs>\\\r?\n         {
601                 /*
602                  * This is tricky; we need to remove the line-continuation
603                  * from preprocessor strings, but OTOH retain them in all
604                  * other strings. This is because the resource grammar is
605                  * even more braindead than initially analysed and line-
606                  * continuations in strings introduce, sigh, newlines in
607                  * the output. There goes the concept of non-breaking, non-
608                  * spacing whitespace.
609                  */
610                 switch(yy_top_state())
611                 {
612                 case pp_pp:
613                 case pp_define:
614                 case pp_mbody:
615                 case pp_inc:
616                 case pp_line:
617                         newline(0);
618                         break;
619                 default:
620                         add_string(ppy_text, ppy_leng);
621                         newline(-1);
622                 }
623         }
624 <pp_iqs,pp_dqs,pp_sqs>\\.       add_string(ppy_text, ppy_leng);
625 <pp_iqs,pp_dqs,pp_sqs>\n        {
626                 newline(1);
627                 add_string(ppy_text, ppy_leng);
628                 ppy_warning("Newline in string constant encounterd (started line %d)", string_start());
629         }
631         /*
632          * Identifier scanning
633          */
634 <INITIAL,pp_if,pp_inc,pp_macexp>{cident}        {
635                 pp_entry_t *ppp;
636                 pp_incl_state.seen_junk++;
637                 if(!(ppp = pplookup(ppy_text)))
638                 {
639                         if(yy_current_state() == pp_inc)
640                                 ppy_error("Expected include filename");
642                         if(yy_current_state() == pp_if)
643                         {
644                                 ppy_lval.cptr = pp_xstrdup(ppy_text);
645                                 return tIDENT;
646                         }
647                         else {
648                                 if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
649                                         yy_push_state(RCINCL);
650                                         return tRCINCLUDE;
651                                 }
652                                 else put_buffer(ppy_text, ppy_leng);
653                         }
654                 }
655                 else if(!ppp->expanding)
656                 {
657                         switch(ppp->type)
658                         {
659                         case def_special:
660                                 expand_special(ppp);
661                                 break;
662                         case def_define:
663                                 expand_define(ppp);
664                                 break;
665                         case def_macro:
666                                 yy_push_state(pp_macign);
667                                 push_macro(ppp);
668                                 break;
669                         default:
670                                 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
671                         }
672                 }
673                 else put_buffer(ppy_text, ppy_leng);
674         }
676         /*
677          * Everything else that needs to be passed and
678          * newline and continuation handling
679          */
680 <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);
681 <INITIAL,pp_macexp>{ws}+        put_buffer(ppy_text, ppy_leng);
682 <INITIAL>\n                     newline(1);
683 <INITIAL>\\\r?\n                newline(0);
684 <INITIAL>\\\r?                  pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
686         /*
687          * Special catcher for macro argmument expansion to prevent
688          * newlines to propagate to the output or admin.
689          */
690 <pp_macexp>(\n)|(.)|(\\\r?(\n|.))       put_buffer(ppy_text, ppy_leng);
692 <RCINCL>[A-Za-z0-9_\.\\/]+ {
693                 ppy_lval.cptr=pp_xstrdup(ppy_text);
694                 yy_pop_state();
695                 return tRCINCLUDEPATH;
696         }
698 <RCINCL>{ws}+ ;
700 <RCINCL>\"              {
701                 new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
702         }
704         /*
705          * This is a 'catch-all' rule to discover errors in the scanner
706          * in an orderly manner.
707          */
708 <*>.            pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
710 <<EOF>> {
711                 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
712                 bufferstackentry_t *bep = pop_buffer();
714                 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
715                         ppy_warning("Unmatched #if/#endif at end of file");
717                 if(!bep)
718                 {
719                         if(YY_START != INITIAL)
720                                 ppy_error("Unexpected end of file during preprocessing");
721                         yyterminate();
722                 }
723                 else if(bep->should_pop == 2)
724                 {
725                         macexpstackentry_t *mac;
726                         mac = pop_macro();
727                         expand_macro(mac);
728                 }
729                 ppy__delete_buffer(b);
730         }
734  **************************************************************************
735  * Support functions
736  **************************************************************************
737  */
739 #ifndef ppy_wrap
740 int ppy_wrap(void)
742         return 1;
744 #endif
748  *-------------------------------------------------------------------------
749  * Output newlines or set them as continuations
751  * Input: -1 - Don't count this one, but update local position (see pp_dqs)
752  *         0 - Line-continuation seen and cache output
753  *         1 - Newline seen and flush output
754  *-------------------------------------------------------------------------
755  */
756 static void newline(int dowrite)
758         pp_status.line_number++;
759         pp_status.char_number = 1;
761         if(dowrite == -1)
762                 return;
764         ncontinuations++;
765         if(dowrite)
766         {
767                 for(;ncontinuations; ncontinuations--)
768                         put_buffer("\n", 1);
769         }
774  *-------------------------------------------------------------------------
775  * Make a number out of an any-base and suffixed string
777  * Possible number extensions:
778  * - ""         int
779  * - "L"        long int
780  * - "LL"       long long int
781  * - "U"        unsigned int
782  * - "UL"       unsigned long int
783  * - "ULL"      unsigned long long int
784  * - "LU"       unsigned long int
785  * - "LLU"      unsigned long long int
786  * - "LUL"      invalid
788  * FIXME:
789  * The sizes of resulting 'int' and 'long' are compiler specific.
790  * I depend on sizeof(int) > 2 here (although a relatively safe
791  * assumption).
792  * Long longs are not yet implemented because this is very compiler
793  * specific and I don't want to think too much about the problems.
795  *-------------------------------------------------------------------------
796  */
797 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
799         int is_l  = 0;
800         int is_ll = 0;
801         int is_u  = 0;
802         char ext[4];
803         long l;
805         ext[3] = '\0';
806         ext[2] = toupper(str[len-1]);
807         ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
808         ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
810         if(!strcmp(ext, "LUL"))
811                 ppy_error("Invalid constant suffix");
812         else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
813         {
814                 is_ll++;
815                 is_u++;
816         }
817         else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
818         {
819                 is_l++;
820                 is_u++;
821         }
822         else if(!strcmp(ext+1, "LL"))
823         {
824                 is_ll++;
825         }
826         else if(!strcmp(ext+2, "L"))
827         {
828                 is_l++;
829         }
830         else if(!strcmp(ext+2, "U"))
831         {
832                 is_u++;
833         }
835         if(is_ll)
836         {
837 /* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
838 #ifdef HAVE_LONG_LONG
839                 if (is_u)
840                 {
841                         errno = 0;
842                         val->ull = strtoull(str, NULL, radix);
843                         if (val->ull == ULLONG_MAX && errno == ERANGE)
844                                 ppy_error("integer constant %s is too large\n", str);
845                         return tULONGLONG;
846                 }
847                 else
848                 {
849                         errno = 0;
850                         val->sll = strtoll(str, NULL, radix);
851                         if ((val->sll == LLONG_MIN || val->sll == LLONG_MAX) && errno == ERANGE)
852                                 ppy_error("integer constant %s is too large\n", str);
853                         return tSLONGLONG;
854                 }
855 #else
856                 pp_internal_error(__FILE__, __LINE__, "long long constants not supported on this platform");
857 #endif
858         }
859         else if(is_u && is_l)
860         {
861                 errno = 0;
862                 val->ulong = strtoul(str, NULL, radix);
863                 if (val->ulong == ULONG_MAX && errno == ERANGE)
864                         ppy_error("integer constant %s is too large\n", str);
865                 return tULONG;
866         }
867         else if(!is_u && is_l)
868         {
869                 errno = 0;
870                 val->slong = strtol(str, NULL, radix);
871                 if ((val->slong == LONG_MIN || val->slong == LONG_MAX) && errno == ERANGE)
872                         ppy_error("integer constant %s is too large\n", str);
873                 return tSLONG;
874         }
875         else if(is_u && !is_l)
876         {
877                 unsigned long ul;
878                 errno = 0;
879                 ul = strtoul(str, NULL, radix);
880                 if ((ul == ULONG_MAX && errno == ERANGE) || (ul > UINT_MAX))
881                         ppy_error("integer constant %s is too large\n", str);
882                 val->uint = (unsigned int)ul;
883                 return tUINT;
884         }
886         /* Else it must be an int... */
887         errno = 0;
888         l = strtol(str, NULL, radix);
889         if (((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE) ||
890                 (l > INT_MAX) || (l < INT_MIN))
891                 ppy_error("integer constant %s is too large\n", str);
892         val->sint = (int)l;
893         return tSINT;
898  *-------------------------------------------------------------------------
899  * Macro and define expansion support
901  * FIXME: Variable macro arguments.
902  *-------------------------------------------------------------------------
903  */
904 static void expand_special(pp_entry_t *ppp)
906         const char *dbgtext = "?";
907         static char *buf = NULL;
909         assert(ppp->type == def_special);
911         if(!strcmp(ppp->ident, "__LINE__"))
912         {
913                 dbgtext = "def_special(__LINE__)";
914                 buf = pp_xrealloc(buf, 32);
915                 sprintf(buf, "%d", pp_status.line_number);
916         }
917         else if(!strcmp(ppp->ident, "__FILE__"))
918         {
919                 dbgtext = "def_special(__FILE__)";
920                 buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
921                 sprintf(buf, "\"%s\"", pp_status.input);
922         }
923         else
924                 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
926         if(pp_flex_debug)
927                 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
928                         macexpstackidx,
929                         pp_status.input,
930                         pp_status.line_number,
931                         ppp->ident,
932                         buf ? buf : "");
934         if(buf && buf[0])
935         {
936                 push_buffer(ppp, NULL, NULL, 0);
937                 yy_scan_string(buf);
938         }
941 static void expand_define(pp_entry_t *ppp)
943         assert(ppp->type == def_define);
945         if(pp_flex_debug)
946                 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
947                         macexpstackidx,
948                         pp_status.input,
949                         pp_status.line_number,
950                         ppp->ident,
951                         ppp->subst.text);
952         if(ppp->subst.text && ppp->subst.text[0])
953         {
954                 push_buffer(ppp, NULL, NULL, 0);
955                 yy_scan_string(ppp->subst.text);
956         }
959 static int curdef_idx = 0;
960 static int curdef_alloc = 0;
961 static char *curdef_text = NULL;
963 static void add_text(const char *str, int len)
965         if(len == 0)
966                 return;
967         if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
968         {
969                 curdef_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
970                 curdef_text = pp_xrealloc(curdef_text, curdef_alloc * sizeof(curdef_text[0]));
971                 if(curdef_alloc > 65536)
972                         ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
973         }
974         memcpy(&curdef_text[curdef_idx], str, len);
975         curdef_idx += len;
978 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
980         char *cptr;
981         char *exp;
982         int tag;
983         int n;
985         if(mtp == NULL)
986                 return NULL;
988         switch(mtp->type)
989         {
990         case exp_text:
991                 if(pp_flex_debug)
992                         fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
993                 add_text(mtp->subst.text, strlen(mtp->subst.text));
994                 break;
996         case exp_stringize:
997                 if(pp_flex_debug)
998                         fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
999                                 mtp->subst.argidx,
1000                                 mep->args[mtp->subst.argidx]);
1001                 cptr = mep->args[mtp->subst.argidx];
1002                 add_text("\"", 1);
1003                 while(*cptr)
1004                 {
1005                         if(*cptr == '"' || *cptr == '\\')
1006                                 add_text("\\", 1);
1007                         add_text(cptr, 1);
1008                         cptr++;
1009                 }
1010                 add_text("\"", 1);
1011                 break;
1013         case exp_concat:
1014                 if(pp_flex_debug)
1015                         fprintf(stderr, "add_expand_text: exp_concat\n");
1016                 /* Remove trailing whitespace from current expansion text */
1017                 while(curdef_idx)
1018                 {
1019                         if(isspace(curdef_text[curdef_idx-1] & 0xff))
1020                                 curdef_idx--;
1021                         else
1022                                 break;
1023                 }
1024                 /* tag current position and recursively expand the next part */
1025                 tag = curdef_idx;
1026                 mtp = add_expand_text(mtp->next, mep, nnl);
1028                 /* Now get rid of the leading space of the expansion */
1029                 cptr = &curdef_text[tag];
1030                 n = curdef_idx - tag;
1031                 while(n)
1032                 {
1033                         if(isspace(*cptr & 0xff))
1034                         {
1035                                 cptr++;
1036                                 n--;
1037                         }
1038                         else
1039                                 break;
1040                 }
1041                 if(cptr != &curdef_text[tag])
1042                 {
1043                         memmove(&curdef_text[tag], cptr, n);
1044                         curdef_idx -= (curdef_idx - tag) - n;
1045                 }
1046                 break;
1048         case exp_subst:
1049                 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1050                         exp = mep->args[mtp->subst.argidx];
1051                 else
1052                         exp = mep->ppargs[mtp->subst.argidx];
1053                 if(exp)
1054                 {
1055                         add_text(exp, strlen(exp));
1056                         *nnl -= mep->nnls[mtp->subst.argidx];
1057                         cptr = strchr(exp, '\n');
1058                         while(cptr)
1059                         {
1060                                 *cptr = ' ';
1061                                 cptr = strchr(cptr+1, '\n');
1062                         }
1063                         mep->nnls[mtp->subst.argidx] = 0;
1064                 }
1065                 if(pp_flex_debug)
1066                         fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1067                 break;
1069         default:
1070                 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1071         }
1072         return mtp;
1075 static void expand_macro(macexpstackentry_t *mep)
1077         mtext_t *mtp;
1078         int n, k;
1079         char *cptr;
1080         int nnl = 0;
1081         pp_entry_t *ppp = mep->ppp;
1082         int nargs = mep->nargs;
1084         assert(ppp->type == def_macro);
1085         assert(ppp->expanding == 0);
1087         if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1088                 ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1090         for(n = 0; n < nargs; n++)
1091                 nnl += mep->nnls[n];
1093         if(pp_flex_debug)
1094                 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1095                         macexpstackidx,
1096                         pp_status.input,
1097                         pp_status.line_number,
1098                         ppp->ident,
1099                         mep->nargs,
1100                         nnl);
1102         curdef_idx = 0;
1104         for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1105         {
1106                 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1107                         break;
1108         }
1110         for(n = 0; n < nnl; n++)
1111                 add_text("\n", 1);
1113         /* To make sure there is room and termination (see below) */
1114         add_text(" \0", 2);
1116         /* Strip trailing whitespace from expansion */
1117         for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1118         {
1119                 if(!isspace(*cptr & 0xff))
1120                         break;
1121         }
1123         /*
1124          * We must add *one* whitespace to make sure that there
1125          * is a token-separation after the expansion.
1126          */
1127         *(++cptr) = ' ';
1128         *(++cptr) = '\0';
1129         k++;
1131         /* Strip leading whitespace from expansion */
1132         for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1133         {
1134                 if(!isspace(*cptr & 0xff))
1135                         break;
1136         }
1138         if(k - n > 0)
1139         {
1140                 if(pp_flex_debug)
1141                         fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1142                 push_buffer(ppp, NULL, NULL, 0);
1143                 /*yy_scan_bytes(curdef_text + n, k - n);*/
1144                 yy_scan_string(curdef_text + n);
1145         }
1149  *-------------------------------------------------------------------------
1150  * String collection routines
1151  *-------------------------------------------------------------------------
1152  */
1153 static void new_string(void)
1155 #ifdef DEBUG
1156         if(strbuf_idx)
1157                 ppy_warning("new_string: strbuf_idx != 0");
1158 #endif
1159         strbuf_idx = 0;
1160         str_startline = pp_status.line_number;
1163 static void add_string(const char *str, int len)
1165         if(len == 0)
1166                 return;
1167         if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1168         {
1169                 strbuf_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
1170                 strbuffer = pp_xrealloc(strbuffer, strbuf_alloc * sizeof(strbuffer[0]));
1171                 if(strbuf_alloc > 65536)
1172                         ppy_warning("Reallocating string buffer larger than 64kB");
1173         }
1174         memcpy(&strbuffer[strbuf_idx], str, len);
1175         strbuf_idx += len;
1178 static char *get_string(void)
1180         char *str = pp_xmalloc(strbuf_idx + 1);
1181         memcpy(str, strbuffer, strbuf_idx);
1182         str[strbuf_idx] = '\0';
1183 #ifdef DEBUG
1184         strbuf_idx = 0;
1185 #endif
1186         return str;
1189 static void put_string(void)
1191         put_buffer(strbuffer, strbuf_idx);
1192 #ifdef DEBUG
1193         strbuf_idx = 0;
1194 #endif
1197 static int string_start(void)
1199         return str_startline;
1204  *-------------------------------------------------------------------------
1205  * Buffer management
1206  *-------------------------------------------------------------------------
1207  */
1208 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1210         if(ppy_debug)
1211                 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1212         if(bufferstackidx >= MAXBUFFERSTACK)
1213                 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1215         memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1216         bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1217         bufferstack[bufferstackidx].define      = ppp;
1218         bufferstack[bufferstackidx].line_number = pp_status.line_number;
1219         bufferstack[bufferstackidx].char_number = pp_status.char_number;
1220         bufferstack[bufferstackidx].if_depth    = pp_get_if_depth();
1221         bufferstack[bufferstackidx].should_pop  = pop;
1222         bufferstack[bufferstackidx].filename    = pp_status.input;
1223         bufferstack[bufferstackidx].ncontinuations      = ncontinuations;
1224         bufferstack[bufferstackidx].incl                = pp_incl_state;
1225         bufferstack[bufferstackidx].include_filename    = incname;
1227         if(ppp)
1228                 ppp->expanding = 1;
1229         else if(filename)
1230         {
1231                 /* These will track the ppy_error to the correct file and line */
1232                 pp_status.line_number = 1;
1233                 pp_status.char_number = 1;
1234                 pp_status.input  = filename;
1235                 ncontinuations = 0;
1236         }
1237         else if(!pop)
1238                 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1239         bufferstackidx++;
1242 static bufferstackentry_t *pop_buffer(void)
1244         if(bufferstackidx < 0)
1245                 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1247         if(bufferstackidx == 0)
1248                 return NULL;
1250         bufferstackidx--;
1252         if(bufferstack[bufferstackidx].define)
1253                 bufferstack[bufferstackidx].define->expanding = 0;
1254         else
1255         {
1256                 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1257                 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1258                 pp_status.input  = bufferstack[bufferstackidx].filename;
1259                 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1260                 if(!bufferstack[bufferstackidx].should_pop)
1261                 {
1262                         fclose(ppy_in);
1263                         fprintf(ppy_out, "# %d \"%s\" 2\n", pp_status.line_number, pp_status.input);
1265                         /* We have EOF, check the include logic */
1266                         if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1267                         {
1268                                 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1269                                 if(ppp)
1270                                 {
1271                                         includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1272                                         iep->ppp = ppp;
1273                                         ppp->iep = iep;
1274                                         iep->filename = bufferstack[bufferstackidx].include_filename;
1275                                         iep->prev = NULL;
1276                                         iep->next = pp_includelogiclist;
1277                                         if(iep->next)
1278                                                 iep->next->prev = iep;
1279                                         pp_includelogiclist = iep;
1280                                         if(pp_status.debug)
1281                                                 fprintf(stderr, "pop_buffer: %s:%d: includelogic added, include_ppp='%s', file='%s'\n", pp_status.input, pp_status.line_number, pp_incl_state.ppp, iep->filename);
1282                                 }
1283                                 else
1284                                         free(bufferstack[bufferstackidx].include_filename);
1285                         }
1286                         free(pp_incl_state.ppp);
1287                         pp_incl_state   = bufferstack[bufferstackidx].incl;
1289                 }
1290         }
1292         if(ppy_debug)
1293                 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1294                         bufferstackidx,
1295                         bufferstack[bufferstackidx].bufferstate,
1296                         bufferstack[bufferstackidx].define,
1297                         bufferstack[bufferstackidx].line_number,
1298                         bufferstack[bufferstackidx].char_number,
1299                         bufferstack[bufferstackidx].if_depth,
1300                         bufferstack[bufferstackidx].filename,
1301                         bufferstack[bufferstackidx].should_pop);
1303         ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1305         if(bufferstack[bufferstackidx].should_pop)
1306         {
1307                 if(yy_current_state() == pp_macexp)
1308                         macro_add_expansion();
1309                 else
1310                         pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1311                 yy_pop_state();
1312         }
1314         return &bufferstack[bufferstackidx];
1319  *-------------------------------------------------------------------------
1320  * Macro nestng support
1321  *-------------------------------------------------------------------------
1322  */
1323 static void push_macro(pp_entry_t *ppp)
1325         if(macexpstackidx >= MAXMACEXPSTACK)
1326                 ppy_error("Too many nested macros");
1328         macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1329         memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1330         macexpstack[macexpstackidx]->ppp = ppp;
1331         macexpstackidx++;
1334 static macexpstackentry_t *top_macro(void)
1336         return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1339 static macexpstackentry_t *pop_macro(void)
1341         if(macexpstackidx <= 0)
1342                 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1343         return macexpstack[--macexpstackidx];
1346 static void free_macro(macexpstackentry_t *mep)
1348         int i;
1350         for(i = 0; i < mep->nargs; i++)
1351                 free(mep->args[i]);
1352         free(mep->args);
1353         free(mep->nnls);
1354         free(mep->curarg);
1355         free(mep);
1358 static void add_text_to_macro(const char *text, int len)
1360         macexpstackentry_t *mep = top_macro();
1362         assert(mep->ppp->expanding == 0);
1364         if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1365         {
1366                 mep->curargalloc += (ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1;
1367                 mep->curarg = pp_xrealloc(mep->curarg, mep->curargalloc * sizeof(mep->curarg[0]));
1368         }
1369         memcpy(mep->curarg + mep->curargsize, text, len);
1370         mep->curargsize += len;
1371         mep->curarg[mep->curargsize] = '\0';
1374 static void macro_add_arg(int last)
1376         int nnl = 0;
1377         char *cptr;
1378         macexpstackentry_t *mep = top_macro();
1380         assert(mep->ppp->expanding == 0);
1382         mep->args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1383         mep->ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1384         mep->nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1385         mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1386         cptr = mep->args[mep->nargs]-1;
1387         while((cptr = strchr(cptr+1, '\n')))
1388         {
1389                 nnl++;
1390         }
1391         mep->nnls[mep->nargs] = nnl;
1392         mep->nargs++;
1393         free(mep->curarg);
1394         mep->curargalloc = mep->curargsize = 0;
1395         mep->curarg = NULL;
1397         if(pp_flex_debug)
1398                 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1399                         pp_status.input,
1400                         pp_status.line_number,
1401                         mep->nargs-1,
1402                         mep->args[mep->nargs-1]);
1404         /* Each macro argument must be expanded to cope with stingize */
1405         if(last || mep->args[mep->nargs-1][0])
1406         {
1407                 yy_push_state(pp_macexp);
1408                 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1409                 yy_scan_string(mep->args[mep->nargs-1]);
1410                 /*mep->bufferstackidx = bufferstackidx;  But not nested! */
1411         }
1414 static void macro_add_expansion(void)
1416         macexpstackentry_t *mep = top_macro();
1418         assert(mep->ppp->expanding == 0);
1420         mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1421         free(mep->curarg);
1422         mep->curargalloc = mep->curargsize = 0;
1423         mep->curarg = NULL;
1425         if(pp_flex_debug)
1426                 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1427                         pp_status.input,
1428                         pp_status.line_number,
1429                         mep->nargs-1,
1430                         mep->ppargs[mep->nargs-1]);
1435  *-------------------------------------------------------------------------
1436  * Output management
1437  *-------------------------------------------------------------------------
1438  */
1439 static void put_buffer(const char *s, int len)
1441         if(top_macro())
1442                 add_text_to_macro(s, len);
1443         else
1444            fwrite(s, 1, len, ppy_out);
1449  *-------------------------------------------------------------------------
1450  * Include management
1451  *-------------------------------------------------------------------------
1452  */
1453 void pp_do_include(char *fname, int type)
1455         char *newpath;
1456         int n;
1457         includelogicentry_t *iep;
1459         for(iep = pp_includelogiclist; iep; iep = iep->next)
1460         {
1461                 if(!strcmp(iep->filename, fname))
1462                 {
1463                         /*
1464                          * We are done. The file was included before.
1465                          * If the define was deleted, then this entry would have
1466                          * been deleted too.
1467                          */
1468                         return;
1469                 }
1470         }
1472         n = strlen(fname);
1474         if(n <= 2)
1475                 ppy_error("Empty include filename");
1477         /* Undo the effect of the quotation */
1478         fname[n-1] = '\0';
1480         if((ppy_in = pp_open_include(fname+1, type ? pp_status.input : NULL, &newpath)) == NULL)
1481                 ppy_error("Unable to open include file %s", fname+1);
1483         fname[n-1] = *fname;    /* Redo the quotes */
1484         push_buffer(NULL, newpath, fname, 0);
1485         pp_incl_state.seen_junk = 0;
1486         pp_incl_state.state = 0;
1487         pp_incl_state.ppp = NULL;
1489         if(pp_status.debug)
1490                 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
1491                         pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
1492         ppy__switch_to_buffer(ppy__create_buffer(ppy_in, YY_BUF_SIZE));
1494         fprintf(ppy_out, "# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1498  *-------------------------------------------------------------------------
1499  * Push/pop preprocessor ignore state when processing conditionals
1500  * which are false.
1501  *-------------------------------------------------------------------------
1502  */
1503 void pp_push_ignore_state(void)
1505         yy_push_state(pp_ignore);
1508 void pp_pop_ignore_state(void)
1510         yy_pop_state();