msvcrt: Remove superfluous casts.
[wine.git] / libs / wpp / ppl.l
blob70bd213122b70decc71503a1314b3cfaa6cc2adc
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  */
124 %top{
125 #include "config.h"
126 #include "wine/port.h"
130  * Special flex options and exclusive scanner start-conditions
131  */
132 %option stack
133 %option 8bit never-interactive
134 %option noinput nounput
135 %option prefix="ppy_"
137 %x pp_pp
138 %x pp_eol
139 %x pp_inc
140 %x pp_dqs
141 %x pp_sqs
142 %x pp_iqs
143 %x pp_comment
144 %x pp_def
145 %x pp_define
146 %x pp_macro
147 %x pp_mbody
148 %x pp_macign
149 %x pp_macscan
150 %x pp_macexp
151 %x pp_if
152 %x pp_ifd
153 %x pp_endif
154 %x pp_line
155 %x pp_defined
156 %x pp_ignore
157 %x RCINCL
159 ws      [ \v\f\t\r]
160 cident  [a-zA-Z_][0-9a-zA-Z_]*
161 ul      [uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
164 #include <stdio.h>
165 #include <stdlib.h>
166 #include <string.h>
167 #include <ctype.h>
168 #include <assert.h>
169 #include <errno.h>
170 #include <limits.h>
172 #ifndef LLONG_MAX
173 # define LLONG_MAX  ((long long)0x7fffffff << 32 | 0xffffffff)
174 # define LLONG_MIN  (-LLONG_MAX - 1)
175 #endif
176 #ifndef ULLONG_MAX
177 # define ULLONG_MAX ((long long)0xffffffff << 32 | 0xffffffff)
178 #endif
180 #ifndef HAVE_UNISTD_H
181 #define YY_NO_UNISTD_H
182 #endif
184 #include "wine/wpp.h"
185 #include "wpp_private.h"
186 #include "ppy.tab.h"
189  * Make sure that we are running an appropriate version of flex.
190  */
191 #if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
192 #error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
193 #endif
195 #define YY_READ_BUF_SIZE        65536           /* So we read most of a file at once */
197 #define yy_current_state()      YY_START
198 #define yy_pp_state(x)          yy_pop_state(); yy_push_state(x)
201  * Always update the current character position within a line
202  */
203 #define YY_USER_ACTION  pp_status.char_number+=ppy_leng;
206  * Buffer management for includes and expansions
207  */
208 #define MAXBUFFERSTACK  128     /* Nesting more than 128 includes or macro expansion textss is insane */
210 typedef struct bufferstackentry {
211         YY_BUFFER_STATE bufferstate;    /* Buffer to switch back to */
212         void            *filehandle;    /* Handle to be used with wpp_callbacks->read */
213         pp_entry_t      *define;        /* Points to expanding define or NULL if handling includes */
214         int             line_number;    /* Line that we were handling */
215         int             char_number;    /* The current position on that line */
216         const char      *filename;      /* Filename that we were handling */
217         int             if_depth;       /* How many #if:s deep to check matching #endif:s */
218         int             ncontinuations; /* Remember the continuation state */
219         int             should_pop;     /* Set if we must pop the start-state on EOF */
220         /* Include management */
221         include_state_t incl;
222         char            *include_filename;
223 } bufferstackentry_t;
225 #define ALLOCBLOCKSIZE  (1 << 10)       /* Allocate these chunks at a time for string-buffers */
228  * Macro expansion nesting
229  * We need the stack to handle expansions while scanning
230  * a macro's arguments. The TOS must always be the macro
231  * that receives the current expansion from the scanner.
232  */
233 #define MAXMACEXPSTACK  128     /* Nesting more than 128 macro expansions is insane */
235 typedef struct macexpstackentry {
236         pp_entry_t      *ppp;           /* This macro we are scanning */
237         char            **args;         /* With these arguments */
238         char            **ppargs;       /* Resulting in these preprocessed arguments */
239         int             *nnls;          /* Number of newlines per argument */
240         int             nargs;          /* And this many arguments scanned */
241         int             parentheses;    /* Nesting level of () */
242         int             curargsize;     /* Current scanning argument's size */
243         int             curargalloc;    /* Current scanning argument's block allocated */
244         char            *curarg;        /* Current scanning argument's content */
245 } macexpstackentry_t;
247 #define MACROPARENTHESES()      (top_macro()->parentheses)
250  * Prototypes
251  */
252 static void newline(int);
253 static int make_number(int radix, YYSTYPE *val, const char *str, int len);
254 static void put_buffer(const char *s, int len);
255 /* Buffer management */
256 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
257 static bufferstackentry_t *pop_buffer(void);
258 /* String functions */
259 static void new_string(void);
260 static void add_string(const char *str, int len);
261 static char *get_string(void);
262 static void put_string(void);
263 static int string_start(void);
264 /* Macro functions */
265 static void push_macro(pp_entry_t *ppp);
266 static macexpstackentry_t *top_macro(void);
267 static macexpstackentry_t *pop_macro(void);
268 static void free_macro(macexpstackentry_t *mep);
269 static void add_text_to_macro(const char *text, int len);
270 static void macro_add_arg(int last);
271 static void macro_add_expansion(void);
272 /* Expansion */
273 static void expand_special(pp_entry_t *ppp);
274 static void expand_define(pp_entry_t *ppp);
275 static void expand_macro(macexpstackentry_t *mep);
278  * Local variables
279  */
280 static int ncontinuations;
282 static int strbuf_idx = 0;
283 static int strbuf_alloc = 0;
284 static char *strbuffer = NULL;
285 static int str_startline;
287 static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
288 static int macexpstackidx = 0;
290 static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
291 static int bufferstackidx = 0;
294  * Global variables
295  */
296 include_state_t pp_incl_state =
298     -1,    /* state */
299     NULL,  /* ppp */
300     0,     /* ifdepth */
301     0      /* seen_junk */
304 includelogicentry_t *pp_includelogiclist = NULL;
306 #define YY_INPUT(buf,result,max_size)                                        \
307         {                                                                    \
308                 result = wpp_callbacks->read(pp_status.file, buf, max_size); \
309         }
311 #define BUFFERINITIALCAPACITY 256
313 void pp_writestring(const char *format, ...)
315         va_list valist;
316         int len;
317         static char *buffer;
318         static int buffercapacity;
319         char *new_buffer;
321         if(buffercapacity == 0)
322         {
323                 buffer = pp_xmalloc(BUFFERINITIALCAPACITY);
324                 if(buffer == NULL)
325                         return;
326                 buffercapacity = BUFFERINITIALCAPACITY;
327         }
329         va_start(valist, format);
330         len = vsnprintf(buffer, buffercapacity,
331                         format, valist);
332         va_end(valist);
333         /* If the string is longer than buffersize, vsnprintf returns
334          * the string length with glibc >= 2.1, -1 with glibc < 2.1 */
335         while(len > buffercapacity || len < 0)
336         {
337                 do
338                 {
339                         buffercapacity *= 2;
340                 } while(len > buffercapacity);
342                 new_buffer = pp_xrealloc(buffer, buffercapacity);
343                 if(new_buffer == NULL)
344                 {
345                         va_end(valist);
346                         return;
347                 }
348                 buffer = new_buffer;
349                 va_start(valist, format);
350                 len = vsnprintf(buffer, buffercapacity,
351                                 format, valist);
352                 va_end(valist);
353         }
355         wpp_callbacks->write(buffer, len);
361  **************************************************************************
362  * The scanner starts here
363  **************************************************************************
364  */
367         /*
368          * Catch line-continuations.
369          * Note: Gcc keeps the line-continuations in, for example, strings
370          * intact. However, I prefer to remove them all so that the next
371          * scanner will not need to reduce the continuation state.
372          *
373          * <*>\\\n              newline(0);
374          */
376         /*
377          * Detect the leading # of a preprocessor directive.
378          */
379 <INITIAL,pp_ignore>^{ws}*#      pp_incl_state.seen_junk++; yy_push_state(pp_pp);
381         /*
382          * Scan for the preprocessor directives
383          */
384 <pp_pp>{ws}*include{ws}*        if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
385 <pp_pp>{ws}*define{ws}*         yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
386 <pp_pp>{ws}*error{ws}*          yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tERROR;
387 <pp_pp>{ws}*warning{ws}*        yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tWARNING;
388 <pp_pp>{ws}*pragma{ws}*         yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tPRAGMA;
389 <pp_pp>{ws}*ident{ws}*          yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tPPIDENT;
390 <pp_pp>{ws}*undef{ws}*          if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
391 <pp_pp>{ws}*ifdef{ws}*          yy_pp_state(pp_ifd);    return tIFDEF;
392 <pp_pp>{ws}*ifndef{ws}*         pp_incl_state.seen_junk--; yy_pp_state(pp_ifd); return tIFNDEF;
393 <pp_pp>{ws}*if{ws}*             yy_pp_state(pp_if);     return tIF;
394 <pp_pp>{ws}*elif{ws}*           yy_pp_state(pp_if);     return tELIF;
395 <pp_pp>{ws}*else{ws}*           yy_pp_state(pp_endif);  return tELSE;
396 <pp_pp>{ws}*endif{ws}*          yy_pp_state(pp_endif);  return tENDIF;
397 <pp_pp>{ws}*line{ws}*           if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
398 <pp_pp>{ws}+                    if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
399 <pp_pp>{ws}*[a-z]+              ppy_error("Invalid preprocessor token '%s'", ppy_text);
400 <pp_pp>\r?\n                    newline(1); yy_pop_state(); return tNL; /* This could be the null-token */
401 <pp_pp>\\\r?\n                  newline(0);
402 <pp_pp>\\\r?                    ppy_error("Preprocessor junk '%s'", ppy_text);
403 <pp_pp>.                        return *ppy_text;
405         /*
406          * Handle #include and #line
407          */
408 <pp_line>[0-9]+                 return make_number(10, &ppy_lval, ppy_text, ppy_leng);
409 <pp_inc>\<                      new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
410 <pp_inc,pp_line>\"              new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
411 <pp_inc,pp_line>{ws}+           ;
412 <pp_inc,pp_line>\n              newline(1); yy_pop_state(); return tNL;
413 <pp_inc,pp_line>\\\r?\n         newline(0);
414 <pp_inc,pp_line>(\\\r?)|(.)     ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
416         /*
417          * Ignore all input when a false clause is parsed
418          */
419 <pp_ignore>[^#/\\\n]+           ;
420 <pp_ignore>\n                   newline(1);
421 <pp_ignore>\\\r?\n              newline(0);
422 <pp_ignore>(\\\r?)|(.)          ;
424         /*
425          * Handle #if and #elif.
426          * These require conditionals to be evaluated, but we do not
427          * want to jam the scanner normally when we see these tokens.
428          * Note: tIDENT is handled below.
429          */
431 <pp_if>0[0-7]*{ul}?             return make_number(8, &ppy_lval, ppy_text, ppy_leng);
432 <pp_if>0[0-7]*[8-9]+{ul}?       ppy_error("Invalid octal digit");
433 <pp_if>[1-9][0-9]*{ul}?         return make_number(10, &ppy_lval, ppy_text, ppy_leng);
434 <pp_if>0[xX][0-9a-fA-F]+{ul}?   return make_number(16, &ppy_lval, ppy_text, ppy_leng);
435 <pp_if>0[xX]                    ppy_error("Invalid hex number");
436 <pp_if>defined                  yy_push_state(pp_defined); return tDEFINED;
437 <pp_if>"<<"                     return tLSHIFT;
438 <pp_if>">>"                     return tRSHIFT;
439 <pp_if>"&&"                     return tLOGAND;
440 <pp_if>"||"                     return tLOGOR;
441 <pp_if>"=="                     return tEQ;
442 <pp_if>"!="                     return tNE;
443 <pp_if>"<="                     return tLTE;
444 <pp_if>">="                     return tGTE;
445 <pp_if>\n                       newline(1); yy_pop_state(); return tNL;
446 <pp_if>\\\r?\n                  newline(0);
447 <pp_if>\\\r?                    ppy_error("Junk in conditional expression");
448 <pp_if>{ws}+                    ;
449 <pp_if>\'                       new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
450 <pp_if>\"                       ppy_error("String constants not allowed in conditionals");
451 <pp_if>.                        return *ppy_text;
453         /*
454          * Handle #ifdef, #ifndef and #undef
455          * to get only an untranslated/unexpanded identifier
456          */
457 <pp_ifd>{cident}        ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
458 <pp_ifd>{ws}+           ;
459 <pp_ifd>\n              newline(1); yy_pop_state(); return tNL;
460 <pp_ifd>\\\r?\n         newline(0);
461 <pp_ifd>(\\\r?)|(.)     ppy_error("Identifier expected");
463         /*
464          * Handle #else and #endif.
465          */
466 <pp_endif>{ws}+         ;
467 <pp_endif>\n            newline(1); yy_pop_state(); return tNL;
468 <pp_endif>\\\r?\n       newline(0);
469 <pp_endif>.             ppy_error("Garbage after #else or #endif.");
471         /*
472          * Handle the special 'defined' keyword.
473          * This is necessary to get the identifier prior to any
474          * substitutions.
475          */
476 <pp_defined>{cident}            yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
477 <pp_defined>{ws}+               ;
478 <pp_defined>(\()|(\))           return *ppy_text;
479 <pp_defined>\\\r?\n             newline(0);
480 <pp_defined>(\\.)|(\n)|(.)      ppy_error("Identifier expected");
482         /*
483          * Handle #error, #warning, #pragma and #ident.
484          * Pass everything literally to the parser, which
485          * will act appropriately.
486          * Comments are stripped from the literal text.
487          */
488 <pp_eol>[^/\\\n]+               if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
489 <pp_eol>\/[^/\\\n*]*            if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
490 <pp_eol>(\\\r?)|(\/[^/*])       if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
491 <pp_eol>\n                      newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
492 <pp_eol>\\\r?\n                 newline(0);
494         /*
495          * Handle left side of #define
496          */
497 <pp_def>{cident}\(              ppy_lval.cptr = pp_xstrdup(ppy_text); if(ppy_lval.cptr) ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro);  return tMACRO;
498 <pp_def>{cident}                ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
499 <pp_def>{ws}+                   ;
500 <pp_def>\\\r?\n                 newline(0);
501 <pp_def>(\\\r?)|(\n)|(.)        perror("Identifier expected");
503         /*
504          * Scan the substitution of a define
505          */
506 <pp_define>[^'"/\\\n]+          ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
507 <pp_define>(\\\r?)|(\/[^/*])    ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
508 <pp_define>\\\r?\n{ws}+         newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
509 <pp_define>\\\r?\n              newline(0);
510 <pp_define>\n                   newline(1); yy_pop_state(); return tNL;
511 <pp_define>\'                   new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
512 <pp_define>\"                   new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
514         /*
515          * Scan the definition macro arguments
516          */
517 <pp_macro>\){ws}*               yy_pp_state(pp_mbody); return tMACROEND;
518 <pp_macro>{ws}+                 ;
519 <pp_macro>{cident}              ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
520 <pp_macro>,                     return ',';
521 <pp_macro>"..."                 return tELIPSIS;
522 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?)      ppy_error("Argument identifier expected");
523 <pp_macro>\\\r?\n               newline(0);
525         /*
526          * Scan the substitution of a macro
527          */
528 <pp_mbody>[^a-zA-Z0-9'"#/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
529 <pp_mbody>{cident}              ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
530 <pp_mbody>\#\#                  return tCONCAT;
531 <pp_mbody>\#                    return tSTRINGIZE;
532 <pp_mbody>[0-9][a-zA-Z0-9]*[^a-zA-Z0-9'"#/\\\n]*        ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
533 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*)     ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
534 <pp_mbody>\\\r?\n{ws}+          newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
535 <pp_mbody>\\\r?\n               newline(0);
536 <pp_mbody>\n                    newline(1); yy_pop_state(); return tNL;
537 <pp_mbody>\'                    new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
538 <pp_mbody>\"                    new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
540         /*
541          * Macro expansion text scanning.
542          * This state is active just after the identifier is scanned
543          * that triggers an expansion. We *must* delete the leading
544          * whitespace before we can start scanning for arguments.
545          *
546          * If we do not see a '(' as next trailing token, then we have
547          * a false alarm. We just continue with a nose-bleed...
548          */
549 <pp_macign>{ws}*/\(     yy_pp_state(pp_macscan);
550 <pp_macign>{ws}*\n      {
551                 if(yy_top_state() != pp_macscan)
552                         newline(0);
553         }
554 <pp_macign>{ws}*\\\r?\n newline(0);
555 <pp_macign>{ws}+|{ws}*\\\r?|.   {
556                 macexpstackentry_t *mac = pop_macro();
557                 yy_pop_state();
558                 put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
559                 put_buffer(ppy_text, ppy_leng);
560                 free_macro(mac);
561         }
563         /*
564          * Macro expansion argument text scanning.
565          * This state is active when a macro's arguments are being read for expansion.
566          */
567 <pp_macscan>\(  {
568                 if(++MACROPARENTHESES() > 1)
569                         add_text_to_macro(ppy_text, ppy_leng);
570         }
571 <pp_macscan>\)  {
572                 if(--MACROPARENTHESES() == 0)
573                 {
574                         yy_pop_state();
575                         macro_add_arg(1);
576                 }
577                 else
578                         add_text_to_macro(ppy_text, ppy_leng);
579         }
580 <pp_macscan>,           {
581                 if(MACROPARENTHESES() > 1)
582                         add_text_to_macro(ppy_text, ppy_leng);
583                 else
584                         macro_add_arg(0);
585         }
586 <pp_macscan>\"          new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
587 <pp_macscan>\'          new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
588 <pp_macscan>"/*"        yy_push_state(pp_comment); add_text_to_macro(" ", 1);
589 <pp_macscan>\n          pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
590 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.)    add_text_to_macro(ppy_text, ppy_leng);
591 <pp_macscan>\\\r?\n     newline(0);
593         /*
594          * Comment handling (almost all start-conditions)
595          */
596 <INITIAL,pp_pp,pp_ignore,pp_eol,pp_inc,pp_if,pp_ifd,pp_endif,pp_defined,pp_def,pp_define,pp_macro,pp_mbody,RCINCL>"/*" yy_push_state(pp_comment);
597 <pp_comment>[^*\n]*|"*"+[^*/\n]*        ;
598 <pp_comment>\n                          newline(0);
599 <pp_comment>"*"+"/"                     yy_pop_state();
601         /*
602          * Remove C++ style comment (almost all start-conditions)
603          */
604 <INITIAL,pp_pp,pp_ignore,pp_eol,pp_inc,pp_if,pp_ifd,pp_endif,pp_defined,pp_def,pp_define,pp_macro,pp_mbody,pp_macscan,RCINCL>"//"[^\n]* {
605                 if(ppy_text[ppy_leng-1] == '\\')
606                         ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
607         }
609         /*
610          * Single, double and <> quoted constants
611          */
612 <INITIAL,pp_macexp>\"           pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
613 <INITIAL,pp_macexp>\'           pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
614 <pp_dqs>[^"\\\n]+               add_string(ppy_text, ppy_leng);
615 <pp_dqs>\"                      {
616                 add_string(ppy_text, ppy_leng);
617                 yy_pop_state();
618                 switch(yy_current_state())
619                 {
620                 case pp_pp:
621                 case pp_define:
622                 case pp_mbody:
623                 case pp_inc:
624                 case RCINCL:
625                         if (yy_current_state()==RCINCL) yy_pop_state();
626                         ppy_lval.cptr = get_string();
627                         return tDQSTRING;
628                 case pp_line:
629                         ppy_lval.cptr = get_string();
630                         return tDQSTRING;
631                 default:
632                         put_string();
633                 }
634         }
635 <pp_sqs>[^'\\\n]+               add_string(ppy_text, ppy_leng);
636 <pp_sqs>\'                      {
637                 add_string(ppy_text, ppy_leng);
638                 yy_pop_state();
639                 switch(yy_current_state())
640                 {
641                 case pp_if:
642                 case pp_define:
643                 case pp_mbody:
644                         ppy_lval.cptr = get_string();
645                         return tSQSTRING;
646                 default:
647                         put_string();
648                 }
649         }
650 <pp_iqs>[^\>\\\n]+              add_string(ppy_text, ppy_leng);
651 <pp_iqs>\>                      {
652                 add_string(ppy_text, ppy_leng);
653                 yy_pop_state();
654                 ppy_lval.cptr = get_string();
655                 return tIQSTRING;
656         }
657 <pp_dqs>\\\r?\n         {
658                 /*
659                  * This is tricky; we need to remove the line-continuation
660                  * from preprocessor strings, but OTOH retain them in all
661                  * other strings. This is because the resource grammar is
662                  * even more braindead than initially analysed and line-
663                  * continuations in strings introduce, sigh, newlines in
664                  * the output. There goes the concept of non-breaking, non-
665                  * spacing whitespace.
666                  */
667                 switch(yy_top_state())
668                 {
669                 case pp_pp:
670                 case pp_define:
671                 case pp_mbody:
672                 case pp_inc:
673                 case pp_line:
674                         newline(0);
675                         break;
676                 default:
677                         add_string(ppy_text, ppy_leng);
678                         newline(-1);
679                 }
680         }
681 <pp_iqs,pp_dqs,pp_sqs>\\.       add_string(ppy_text, ppy_leng);
682 <pp_iqs,pp_dqs,pp_sqs>\n        {
683                 newline(1);
684                 add_string(ppy_text, ppy_leng);
685                 ppy_warning("Newline in string constant encountered (started line %d)", string_start());
686         }
688         /*
689          * Identifier scanning
690          */
691 <INITIAL,pp_if,pp_inc,pp_macexp>{cident}        {
692                 pp_entry_t *ppp;
693                 pp_incl_state.seen_junk++;
694                 if(!(ppp = pplookup(ppy_text)))
695                 {
696                         if(yy_current_state() == pp_inc)
697                                 ppy_error("Expected include filename");
699                         else if(yy_current_state() == pp_if)
700                         {
701                                 ppy_lval.cptr = pp_xstrdup(ppy_text);
702                                 return tIDENT;
703                         }
704                         else {
705                                 if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
706                                         yy_push_state(RCINCL);
707                                         return tRCINCLUDE;
708                                 }
709                                 else put_buffer(ppy_text, ppy_leng);
710                         }
711                 }
712                 else if(!ppp->expanding)
713                 {
714                         switch(ppp->type)
715                         {
716                         case def_special:
717                                 expand_special(ppp);
718                                 break;
719                         case def_define:
720                                 expand_define(ppp);
721                                 break;
722                         case def_macro:
723                                 yy_push_state(pp_macign);
724                                 push_macro(ppp);
725                                 break;
726                         default:
727                                 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
728                         }
729                 }
730                 else put_buffer(ppy_text, ppy_leng);
731         }
733         /*
734          * Everything else that needs to be passed and
735          * newline and continuation handling
736          */
737 <INITIAL,pp_macexp>[^a-zA-Z_#'"/\\\n \r\t\f\v]+|(\/|\\)[^a-zA-Z_/*'"\\\n \r\t\v\f]*     pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
738 <INITIAL,pp_macexp>{ws}+        put_buffer(ppy_text, ppy_leng);
739 <INITIAL>\n                     newline(1);
740 <INITIAL>\\\r?\n                newline(0);
741 <INITIAL>\\\r?                  pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
743         /*
744          * Special catcher for macro argmument expansion to prevent
745          * newlines to propagate to the output or admin.
746          */
747 <pp_macexp>(\n)|(.)|(\\\r?(\n|.))       put_buffer(ppy_text, ppy_leng);
749 <RCINCL>[A-Za-z0-9_\.\\/]+ {
750                 ppy_lval.cptr=pp_xstrdup(ppy_text);
751                 yy_pop_state();
752                 return tRCINCLUDEPATH;
753         }
755 <RCINCL>{ws}+ ;
757 <RCINCL>\"              {
758                 new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
759         }
761         /*
762          * This is a 'catch-all' rule to discover errors in the scanner
763          * in an orderly manner.
764          */
765 <*>.            pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
767 <<EOF>> {
768                 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
769                 bufferstackentry_t *bep = pop_buffer();
771                 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
772                         ppy_warning("Unmatched #if/#endif at end of file");
774                 if(!bep)
775                 {
776                         if(YY_START != INITIAL)
777                         {
778                                 ppy_error("Unexpected end of file during preprocessing");
779                                 BEGIN(INITIAL);
780                         }
781                         yyterminate();
782                 }
783                 else if(bep->should_pop == 2)
784                 {
785                         macexpstackentry_t *mac;
786                         mac = pop_macro();
787                         expand_macro(mac);
788                 }
789                 ppy__delete_buffer(b);
790         }
794  **************************************************************************
795  * Support functions
796  **************************************************************************
797  */
799 #ifndef ppy_wrap
800 int ppy_wrap(void)
802         return 1;
804 #endif
808  *-------------------------------------------------------------------------
809  * Output newlines or set them as continuations
811  * Input: -1 - Don't count this one, but update local position (see pp_dqs)
812  *         0 - Line-continuation seen and cache output
813  *         1 - Newline seen and flush output
814  *-------------------------------------------------------------------------
815  */
816 static void newline(int dowrite)
818         pp_status.line_number++;
819         pp_status.char_number = 1;
821         if(dowrite == -1)
822                 return;
824         ncontinuations++;
825         if(dowrite)
826         {
827                 for(;ncontinuations; ncontinuations--)
828                         put_buffer("\n", 1);
829         }
834  *-------------------------------------------------------------------------
835  * Make a number out of an any-base and suffixed string
837  * Possible number extensions:
838  * - ""         int
839  * - "L"        long int
840  * - "LL"       long long int
841  * - "U"        unsigned int
842  * - "UL"       unsigned long int
843  * - "ULL"      unsigned long long int
844  * - "LU"       unsigned long int
845  * - "LLU"      unsigned long long int
846  * - "LUL"      invalid
848  * FIXME:
849  * The sizes of resulting 'int' and 'long' are compiler specific.
850  * I depend on sizeof(int) > 2 here (although a relatively safe
851  * assumption).
852  * Long longs are not yet implemented because this is very compiler
853  * specific and I don't want to think too much about the problems.
855  *-------------------------------------------------------------------------
856  */
857 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
859         int is_l  = 0;
860         int is_ll = 0;
861         int is_u  = 0;
862         char ext[4];
863         long l;
865         ext[3] = '\0';
866         ext[2] = toupper(str[len-1]);
867         ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
868         ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
870         if(!strcmp(ext, "LUL"))
871         {
872                 ppy_error("Invalid constant suffix");
873                 return 0;
874         }
875         else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
876         {
877                 is_ll++;
878                 is_u++;
879         }
880         else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
881         {
882                 is_l++;
883                 is_u++;
884         }
885         else if(!strcmp(ext+1, "LL"))
886         {
887                 is_ll++;
888         }
889         else if(!strcmp(ext+2, "L"))
890         {
891                 is_l++;
892         }
893         else if(!strcmp(ext+2, "U"))
894         {
895                 is_u++;
896         }
898         if(is_ll)
899         {
900 /* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
901 #ifdef HAVE_LONG_LONG
902                 if (is_u)
903                 {
904                         errno = 0;
905                         val->ull = strtoull(str, NULL, radix);
906                         if (val->ull == ULLONG_MAX && errno == ERANGE)
907                                 ppy_error("integer constant %s is too large\n", str);
908                         return tULONGLONG;
909                 }
910                 else
911                 {
912                         errno = 0;
913                         val->sll = strtoll(str, NULL, radix);
914                         if ((val->sll == LLONG_MIN || val->sll == LLONG_MAX) && errno == ERANGE)
915                                 ppy_error("integer constant %s is too large\n", str);
916                         return tSLONGLONG;
917                 }
918 #else
919                 pp_internal_error(__FILE__, __LINE__, "long long constants not supported on this platform");
920 #endif
921         }
922         else if(is_u && is_l)
923         {
924                 errno = 0;
925                 val->ulong = strtoul(str, NULL, radix);
926                 if (val->ulong == ULONG_MAX && errno == ERANGE)
927                         ppy_error("integer constant %s is too large\n", str);
928                 return tULONG;
929         }
930         else if(!is_u && is_l)
931         {
932                 errno = 0;
933                 val->slong = strtol(str, NULL, radix);
934                 if ((val->slong == LONG_MIN || val->slong == LONG_MAX) && errno == ERANGE)
935                         ppy_error("integer constant %s is too large\n", str);
936                 return tSLONG;
937         }
938         else if(is_u && !is_l)
939         {
940                 unsigned long ul;
941                 errno = 0;
942                 ul = strtoul(str, NULL, radix);
943                 if ((ul == ULONG_MAX && errno == ERANGE) || (ul > UINT_MAX))
944                         ppy_error("integer constant %s is too large\n", str);
945                 val->uint = (unsigned int)ul;
946                 return tUINT;
947         }
949         /* Else it must be an int... */
950         errno = 0;
951         l = strtol(str, NULL, radix);
952         if (((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE) ||
953                 (l > INT_MAX) || (l < INT_MIN))
954                 ppy_error("integer constant %s is too large\n", str);
955         val->sint = (int)l;
956         return tSINT;
961  *-------------------------------------------------------------------------
962  * Macro and define expansion support
964  * FIXME: Variable macro arguments.
965  *-------------------------------------------------------------------------
966  */
967 static void expand_special(pp_entry_t *ppp)
969         static char *buf = NULL;
970         char *new_buf;
972         assert(ppp->type == def_special);
974         if(!strcmp(ppp->ident, "__LINE__"))
975         {
976                 new_buf = pp_xrealloc(buf, 32);
977                 if(!new_buf)
978                         return;
979                 buf = new_buf;
980                 sprintf(buf, "%d", pp_status.line_number);
981         }
982         else if(!strcmp(ppp->ident, "__FILE__"))
983         {
984                 new_buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
985                 if(!new_buf)
986                         return;
987                 buf = new_buf;
988                 sprintf(buf, "\"%s\"", pp_status.input);
989         }
990         else
991                 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
993         if(pp_flex_debug)
994                 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
995                         macexpstackidx,
996                         pp_status.input,
997                         pp_status.line_number,
998                         ppp->ident,
999                         buf ? buf : "");
1001         if(buf && buf[0])
1002         {
1003                 push_buffer(ppp, NULL, NULL, 0);
1004                 yy_scan_string(buf);
1005         }
1008 static void expand_define(pp_entry_t *ppp)
1010         assert(ppp->type == def_define);
1012         if(pp_flex_debug)
1013                 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
1014                         macexpstackidx,
1015                         pp_status.input,
1016                         pp_status.line_number,
1017                         ppp->ident,
1018                         ppp->subst.text);
1019         if(ppp->subst.text && ppp->subst.text[0])
1020         {
1021                 push_buffer(ppp, NULL, NULL, 0);
1022                 yy_scan_string(ppp->subst.text);
1023         }
1026 static int curdef_idx = 0;
1027 static int curdef_alloc = 0;
1028 static char *curdef_text = NULL;
1030 static void add_text(const char *str, int len)
1032         int new_alloc;
1033         char *new_text;
1035         if(len == 0)
1036                 return;
1037         if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
1038         {
1039                 new_alloc = curdef_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1040                 new_text = pp_xrealloc(curdef_text, new_alloc * sizeof(curdef_text[0]));
1041                 if(!new_text)
1042                         return;
1043                 curdef_text = new_text;
1044                 curdef_alloc = new_alloc;
1045                 if(curdef_alloc > 65536)
1046                         ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
1047         }
1048         memcpy(&curdef_text[curdef_idx], str, len);
1049         curdef_idx += len;
1052 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
1054         char *cptr;
1055         char *exp;
1056         int tag;
1057         int n;
1059         if(mtp == NULL)
1060                 return NULL;
1062         switch(mtp->type)
1063         {
1064         case exp_text:
1065                 if(pp_flex_debug)
1066                         fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
1067                 add_text(mtp->subst.text, strlen(mtp->subst.text));
1068                 break;
1070         case exp_stringize:
1071                 if(pp_flex_debug)
1072                         fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
1073                                 mtp->subst.argidx,
1074                                 mep->args[mtp->subst.argidx]);
1075                 cptr = mep->args[mtp->subst.argidx];
1076                 add_text("\"", 1);
1077                 while(*cptr)
1078                 {
1079                         if(*cptr == '"' || *cptr == '\\')
1080                                 add_text("\\", 1);
1081                         add_text(cptr, 1);
1082                         cptr++;
1083                 }
1084                 add_text("\"", 1);
1085                 break;
1087         case exp_concat:
1088                 if(pp_flex_debug)
1089                         fprintf(stderr, "add_expand_text: exp_concat\n");
1090                 /* Remove trailing whitespace from current expansion text */
1091                 while(curdef_idx)
1092                 {
1093                         if(isspace(curdef_text[curdef_idx-1] & 0xff))
1094                                 curdef_idx--;
1095                         else
1096                                 break;
1097                 }
1098                 /* tag current position and recursively expand the next part */
1099                 tag = curdef_idx;
1100                 mtp = add_expand_text(mtp->next, mep, nnl);
1102                 /* Now get rid of the leading space of the expansion */
1103                 cptr = &curdef_text[tag];
1104                 n = curdef_idx - tag;
1105                 while(n)
1106                 {
1107                         if(isspace(*cptr & 0xff))
1108                         {
1109                                 cptr++;
1110                                 n--;
1111                         }
1112                         else
1113                                 break;
1114                 }
1115                 if(cptr != &curdef_text[tag])
1116                 {
1117                         memmove(&curdef_text[tag], cptr, n);
1118                         curdef_idx -= (curdef_idx - tag) - n;
1119                 }
1120                 break;
1122         case exp_subst:
1123                 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1124                         exp = mep->args[mtp->subst.argidx];
1125                 else
1126                         exp = mep->ppargs[mtp->subst.argidx];
1127                 if(exp)
1128                 {
1129                         add_text(exp, strlen(exp));
1130                         *nnl -= mep->nnls[mtp->subst.argidx];
1131                         cptr = strchr(exp, '\n');
1132                         while(cptr)
1133                         {
1134                                 *cptr = ' ';
1135                                 cptr = strchr(cptr+1, '\n');
1136                         }
1137                         mep->nnls[mtp->subst.argidx] = 0;
1138                 }
1139                 if(pp_flex_debug)
1140                         fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1141                 break;
1143         default:
1144                 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1145         }
1146         return mtp;
1149 static void expand_macro(macexpstackentry_t *mep)
1151         mtext_t *mtp;
1152         int n, k;
1153         char *cptr;
1154         int nnl = 0;
1155         pp_entry_t *ppp = mep->ppp;
1156         int nargs = mep->nargs;
1158         assert(ppp->type == def_macro);
1159         assert(ppp->expanding == 0);
1161         if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1162         {
1163                 ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1164                 return;
1165         }
1167         for(n = 0; n < nargs; n++)
1168                 nnl += mep->nnls[n];
1170         if(pp_flex_debug)
1171                 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1172                         macexpstackidx,
1173                         pp_status.input,
1174                         pp_status.line_number,
1175                         ppp->ident,
1176                         mep->nargs,
1177                         nnl);
1179         curdef_idx = 0;
1181         for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1182         {
1183                 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1184                         break;
1185         }
1187         for(n = 0; n < nnl; n++)
1188                 add_text("\n", 1);
1190         /* To make sure there is room and termination (see below) */
1191         add_text(" \0", 2);
1193         /* Strip trailing whitespace from expansion */
1194         for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1195         {
1196                 if(!isspace(*cptr & 0xff))
1197                         break;
1198         }
1200         /*
1201          * We must add *one* whitespace to make sure that there
1202          * is a token-separation after the expansion.
1203          */
1204         *(++cptr) = ' ';
1205         *(++cptr) = '\0';
1206         k++;
1208         /* Strip leading whitespace from expansion */
1209         for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1210         {
1211                 if(!isspace(*cptr & 0xff))
1212                         break;
1213         }
1215         if(k - n > 0)
1216         {
1217                 if(pp_flex_debug)
1218                         fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1219                 push_buffer(ppp, NULL, NULL, 0);
1220                 /*yy_scan_bytes(curdef_text + n, k - n);*/
1221                 yy_scan_string(curdef_text + n);
1222         }
1226  *-------------------------------------------------------------------------
1227  * String collection routines
1228  *-------------------------------------------------------------------------
1229  */
1230 static void new_string(void)
1232 #ifdef DEBUG
1233         if(strbuf_idx)
1234                 ppy_warning("new_string: strbuf_idx != 0");
1235 #endif
1236         strbuf_idx = 0;
1237         str_startline = pp_status.line_number;
1240 static void add_string(const char *str, int len)
1242         int new_alloc;
1243         char *new_buffer;
1245         if(len == 0)
1246                 return;
1247         if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1248         {
1249                 new_alloc = strbuf_alloc + ((len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1));
1250                 new_buffer = pp_xrealloc(strbuffer, new_alloc * sizeof(strbuffer[0]));
1251                 if(!new_buffer)
1252                         return;
1253                 strbuffer = new_buffer;
1254                 strbuf_alloc = new_alloc;
1255                 if(strbuf_alloc > 65536)
1256                         ppy_warning("Reallocating string buffer larger than 64kB");
1257         }
1258         memcpy(&strbuffer[strbuf_idx], str, len);
1259         strbuf_idx += len;
1262 static char *get_string(void)
1264         char *str = pp_xmalloc(strbuf_idx + 1);
1265         if(!str)
1266                 return NULL;
1267         memcpy(str, strbuffer, strbuf_idx);
1268         str[strbuf_idx] = '\0';
1269 #ifdef DEBUG
1270         strbuf_idx = 0;
1271 #endif
1272         return str;
1275 static void put_string(void)
1277         put_buffer(strbuffer, strbuf_idx);
1278 #ifdef DEBUG
1279         strbuf_idx = 0;
1280 #endif
1283 static int string_start(void)
1285         return str_startline;
1290  *-------------------------------------------------------------------------
1291  * Buffer management
1292  *-------------------------------------------------------------------------
1293  */
1294 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1296         if(ppy_debug)
1297                 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1298         if(bufferstackidx >= MAXBUFFERSTACK)
1299                 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1301         memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1302         bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1303         bufferstack[bufferstackidx].filehandle  = pp_status.file;
1304         bufferstack[bufferstackidx].define      = ppp;
1305         bufferstack[bufferstackidx].line_number = pp_status.line_number;
1306         bufferstack[bufferstackidx].char_number = pp_status.char_number;
1307         bufferstack[bufferstackidx].if_depth    = pp_get_if_depth();
1308         bufferstack[bufferstackidx].should_pop  = pop;
1309         bufferstack[bufferstackidx].filename    = pp_status.input;
1310         bufferstack[bufferstackidx].ncontinuations      = ncontinuations;
1311         bufferstack[bufferstackidx].incl                = pp_incl_state;
1312         bufferstack[bufferstackidx].include_filename    = incname;
1314         if(ppp)
1315                 ppp->expanding = 1;
1316         else if(filename)
1317         {
1318                 /* These will track the ppy_error to the correct file and line */
1319                 pp_status.line_number = 1;
1320                 pp_status.char_number = 1;
1321                 pp_status.input  = filename;
1322                 ncontinuations = 0;
1323         }
1324         else if(!pop)
1325                 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1326         bufferstackidx++;
1329 static bufferstackentry_t *pop_buffer(void)
1331         if(bufferstackidx < 0)
1332                 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1334         if(bufferstackidx == 0)
1335                 return NULL;
1337         bufferstackidx--;
1339         if(bufferstack[bufferstackidx].define)
1340                 bufferstack[bufferstackidx].define->expanding = 0;
1341         else
1342         {
1343                 if(!bufferstack[bufferstackidx].should_pop)
1344                 {
1345                         wpp_callbacks->close(pp_status.file);
1346                         pp_writestring("# %d \"%s\" 2\n", bufferstack[bufferstackidx].line_number, bufferstack[bufferstackidx].filename);
1348                         /* We have EOF, check the include logic */
1349                         if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1350                         {
1351                                 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1352                                 if(ppp)
1353                                 {
1354                                         includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1355                                         if(!iep)
1356                                                 return NULL;
1358                                         iep->ppp = ppp;
1359                                         ppp->iep = iep;
1360                                         iep->filename = bufferstack[bufferstackidx].include_filename;
1361                                         iep->prev = NULL;
1362                                         iep->next = pp_includelogiclist;
1363                                         if(iep->next)
1364                                                 iep->next->prev = iep;
1365                                         pp_includelogiclist = iep;
1366                                         if(pp_status.debug)
1367                                                 fprintf(stderr, "pop_buffer: %s:%d: includelogic added, include_ppp='%s', file='%s'\n", bufferstack[bufferstackidx].filename, bufferstack[bufferstackidx].line_number, pp_incl_state.ppp, iep->filename);
1368                                 }
1369                                 else
1370                                         free(bufferstack[bufferstackidx].include_filename);
1371                         }
1372                         free(pp_incl_state.ppp);
1373                         pp_incl_state   = bufferstack[bufferstackidx].incl;
1375                 }
1376                 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1377                 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1378                 pp_status.input  = bufferstack[bufferstackidx].filename;
1379                 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1380         }
1382         if(ppy_debug)
1383                 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1384                         bufferstackidx,
1385                         bufferstack[bufferstackidx].bufferstate,
1386                         bufferstack[bufferstackidx].define,
1387                         bufferstack[bufferstackidx].line_number,
1388                         bufferstack[bufferstackidx].char_number,
1389                         bufferstack[bufferstackidx].if_depth,
1390                         bufferstack[bufferstackidx].filename,
1391                         bufferstack[bufferstackidx].should_pop);
1393         pp_status.file = bufferstack[bufferstackidx].filehandle;
1394         ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1396         if(bufferstack[bufferstackidx].should_pop)
1397         {
1398                 if(yy_current_state() == pp_macexp)
1399                         macro_add_expansion();
1400                 else
1401                         pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1402                 yy_pop_state();
1403         }
1405         return &bufferstack[bufferstackidx];
1410  *-------------------------------------------------------------------------
1411  * Macro nestng support
1412  *-------------------------------------------------------------------------
1413  */
1414 static void push_macro(pp_entry_t *ppp)
1416         if(macexpstackidx >= MAXMACEXPSTACK)
1417         {
1418                 ppy_error("Too many nested macros");
1419                 return;
1420         }
1422         macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1423         if(!macexpstack[macexpstackidx])
1424                 return;
1425         memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1426         macexpstack[macexpstackidx]->ppp = ppp;
1427         macexpstackidx++;
1430 static macexpstackentry_t *top_macro(void)
1432         return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1435 static macexpstackentry_t *pop_macro(void)
1437         if(macexpstackidx <= 0)
1438                 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1439         return macexpstack[--macexpstackidx];
1442 static void free_macro(macexpstackentry_t *mep)
1444         int i;
1446         for(i = 0; i < mep->nargs; i++)
1447                 free(mep->args[i]);
1448         free(mep->args);
1449         free(mep->nnls);
1450         free(mep->curarg);
1451         free(mep);
1454 static void add_text_to_macro(const char *text, int len)
1456         macexpstackentry_t *mep = top_macro();
1458         assert(mep->ppp->expanding == 0);
1460         if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1461         {
1462                 char *new_curarg;
1463                 int new_alloc = mep->curargalloc + ((ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1);
1464                 new_curarg = pp_xrealloc(mep->curarg, new_alloc * sizeof(mep->curarg[0]));
1465                 if(!new_curarg)
1466                         return;
1467                 mep->curarg = new_curarg;
1468                 mep->curargalloc = new_alloc;
1469         }
1470         memcpy(mep->curarg + mep->curargsize, text, len);
1471         mep->curargsize += len;
1472         mep->curarg[mep->curargsize] = '\0';
1475 static void macro_add_arg(int last)
1477         int nnl = 0;
1478         char *cptr;
1479         char **new_args, **new_ppargs;
1480         int *new_nnls;
1481         macexpstackentry_t *mep = top_macro();
1483         assert(mep->ppp->expanding == 0);
1485         new_args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1486         if(!new_args)
1487                 return;
1488         mep->args = new_args;
1490         new_ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1491         if(!new_ppargs)
1492                 return;
1493         mep->ppargs = new_ppargs;
1495         new_nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1496         if(!new_nnls)
1497                 return;
1498         mep->nnls = new_nnls;
1500         mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1501         if(!mep->args[mep->nargs])
1502                 return;
1503         cptr = mep->args[mep->nargs]-1;
1504         while((cptr = strchr(cptr+1, '\n')))
1505         {
1506                 nnl++;
1507         }
1508         mep->nnls[mep->nargs] = nnl;
1509         mep->nargs++;
1510         free(mep->curarg);
1511         mep->curargalloc = mep->curargsize = 0;
1512         mep->curarg = NULL;
1514         if(pp_flex_debug)
1515                 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1516                         pp_status.input,
1517                         pp_status.line_number,
1518                         mep->nargs-1,
1519                         mep->args[mep->nargs-1]);
1521         /* Each macro argument must be expanded to cope with stingize */
1522         if(last || mep->args[mep->nargs-1][0])
1523         {
1524                 yy_push_state(pp_macexp);
1525                 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1526                 yy_scan_string(mep->args[mep->nargs-1]);
1527                 /*mep->bufferstackidx = bufferstackidx;  But not nested! */
1528         }
1531 static void macro_add_expansion(void)
1533         macexpstackentry_t *mep = top_macro();
1535         assert(mep->ppp->expanding == 0);
1537         mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1538         free(mep->curarg);
1539         mep->curargalloc = mep->curargsize = 0;
1540         mep->curarg = NULL;
1542         if(pp_flex_debug)
1543                 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1544                         pp_status.input,
1545                         pp_status.line_number,
1546                         mep->nargs-1,
1547                         mep->ppargs[mep->nargs-1] ? mep->ppargs[mep->nargs-1] : "");
1552  *-------------------------------------------------------------------------
1553  * Output management
1554  *-------------------------------------------------------------------------
1555  */
1556 static void put_buffer(const char *s, int len)
1558         if(top_macro())
1559                 add_text_to_macro(s, len);
1560         else
1561                 wpp_callbacks->write(s, len);
1566  *-------------------------------------------------------------------------
1567  * Include management
1568  *-------------------------------------------------------------------------
1569  */
1570 void pp_do_include(char *fname, int type)
1572         char *newpath;
1573         int n;
1574         includelogicentry_t *iep;
1575         void *fp;
1577         if(!fname)
1578                 return;
1580         for(iep = pp_includelogiclist; iep; iep = iep->next)
1581         {
1582                 if(!strcmp(iep->filename, fname))
1583                 {
1584                         /*
1585                          * We are done. The file was included before.
1586                          * If the define was deleted, then this entry would have
1587                          * been deleted too.
1588                          */
1589                         return;
1590                 }
1591         }
1593         n = strlen(fname);
1595         if(n <= 2)
1596         {
1597                 ppy_error("Empty include filename");
1598                 return;
1599         }
1601         /* Undo the effect of the quotation */
1602         fname[n-1] = '\0';
1604         if((fp = pp_open_include(fname+1, type, pp_status.input, &newpath)) == NULL)
1605         {
1606                 ppy_error("Unable to open include file %s", fname+1);
1607                 return;
1608         }
1610         fname[n-1] = *fname;    /* Redo the quotes */
1611         push_buffer(NULL, newpath, fname, 0);
1612         pp_incl_state.seen_junk = 0;
1613         pp_incl_state.state = 0;
1614         pp_incl_state.ppp = NULL;
1616         if(pp_status.debug)
1617                 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
1618                         pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
1619         pp_status.file = fp;
1620         ppy__switch_to_buffer(ppy__create_buffer(NULL, YY_BUF_SIZE));
1622         pp_writestring("# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1626  *-------------------------------------------------------------------------
1627  * Push/pop preprocessor ignore state when processing conditionals
1628  * which are false.
1629  *-------------------------------------------------------------------------
1630  */
1631 void pp_push_ignore_state(void)
1633         yy_push_state(pp_ignore);
1636 void pp_pop_ignore_state(void)
1638         yy_pop_state();