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   1 /* -*-C-*-
   2  * Wrc preprocessor lexical analysis
   3  *
   4  * Copyright 1999-2000  Bertho A. Stultiens (BS)
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * History:
  21  * 24-Apr-2000 BS       - Started from scratch to restructure everything
  22  *                        and reintegrate the source into the wine-tree.
  23  * 04-Jan-2000 BS       - Added comments about the lexicographical
  24  *                        grammar to give some insight in the complexity.
  25  * 28-Dec-1999 BS       - Eliminated backing-up of the flexer by running
  26  *                        `flex -b' on the source. This results in some
  27  *                        weirdo extra rules, but a much faster scanner.
  28  * 23-Dec-1999 BS       - Started this file
  29  *
  30  *-------------------------------------------------------------------------
  31  * The preprocessor's lexographical grammar (approximately):
  32  *
  33  * pp           := {ws} # {ws} if {ws} {expr} {ws} \n
  34  *              |  {ws} # {ws} ifdef {ws} {id} {ws} \n
  35  *              |  {ws} # {ws} ifndef {ws} {id} {ws} \n
  36  *              |  {ws} # {ws} elif {ws} {expr} {ws} \n
  37  *              |  {ws} # {ws} else {ws} \n
  38  *              |  {ws} # {ws} endif {ws} \n
  39  *              |  {ws} # {ws} include {ws} < {anytext} > \n
  40  *              |  {ws} # {ws} include {ws} " {anytext} " \n
  41  *              |  {ws} # {ws} define {ws} {anytext} \n
  42  *              |  {ws} # {ws} define( {arglist} ) {ws} {expansion} \n
  43  *              |  {ws} # {ws} pragma {ws} {anytext} \n
  44  *              |  {ws} # {ws} ident {ws} {anytext} \n
  45  *              |  {ws} # {ws} error {ws} {anytext} \n
  46  *              |  {ws} # {ws} warning {ws} {anytext} \n
  47  *              |  {ws} # {ws} line {ws} " {anytext} " {number} \n
  48  *              |  {ws} # {ws} {number} " {anytext} " {number} [ {number} [{number}] ] \n
  49  *              |  {ws} # {ws} \n
  50  *
  51  * ws           := [ \t\r\f\v]*
  52  *
  53  * expr         := {expr} [+-*%^/|&] {expr}
  54  *              |  {expr} {logor|logand} {expr}
  55  *              |  [!~+-] {expr}
  56  *              |  {expr} ? {expr} : {expr}
  57  *
  58  * logor        := ||
  59  *
  60  * logand       := &&
  61  *
  62  * id           := [a-zA-Z_][a-zA-Z0-9_]*
  63  *
  64  * anytext      := [^\n]*       (see note)
  65  *
  66  * arglist      :=
  67  *              |  {id}
  68  *              |  {arglist} , {id}
  69  *              |  {arglist} , {id} ...
  70  *
  71  * expansion    := {id}
  72  *              |  # {id}
  73  *              |  {anytext}
  74  *              |  {anytext} ## {anytext}
  75  *
  76  * number       := [0-9]+
  77  *
  78  * Note: "anytext" is not always "[^\n]*". This is because the
  79  *       trailing context must be considered as well.
  80  *
  81  * The only certain assumption for the preprocessor to make is that
  82  * directives start at the beginning of the line, followed by a '#'
  83  * and end with a newline.
  84  * Any directive may be suffixed with a line-continuation. Also
  85  * classical comment / *...* / (note: no comments within comments,
  86  * therefore spaces) is considered to be a line-continuation
  87  * (according to gcc and egcs AFAIK, ANSI is a bit vague).
  88  * Comments have not been added to the above grammar for simplicity
  89  * reasons. However, it is allowed to enter comment anywhere within
  90  * the directives as long as they do not interfere with the context.
  91  * All comments are considered to be deletable whitespace (both
  92  * classical form "/ *...* /" and C++ form "//...\n").
  93  *
  94  * All recursive scans, except for macro-expansion, are done by the
  95  * parser, whereas the simple state transitions of non-recursive
  96  * directives are done in the scanner. This results in the many
  97  * exclusive start-conditions of the scanner.
  98  *
  99  * Macro expansions are slightly more difficult because they have to
 100  * prescan the arguments. Parameter substitution is literal if the
 101  * substitution is # or ## (either side). This enables new identifiers
 102  * to be created (see 'info cpp' node Macro|Pitfalls|Prescan for more
 103  * information).
 104  *
 105  * FIXME: Variable macro parameters is recognized, but not yet
 106  * expanded. I have to reread the ANSI standard on the subject (yes,
 107  * ANSI defines it).
 108  *
 109  * The following special defines are supported:
 110  * __FILE__     -> "thissource.c"
 111  * __LINE__     -> 123
 112  * __DATE__     -> "May  1 2000"
 113  * __TIME__     -> "23:59:59"
 114  * These macros expand, as expected, into their ANSI defined values.
 115  *
 116  * The same include prevention is implemented as gcc and egcs does.
 117  * This results in faster processing because we do not read the text
 118  * at all. Some wine-sources attempt to include the same file 4 or 5
 119  * times. This strategy also saves a lot blank output-lines, which in
 120  * its turn improves the real resource scanner/parser.
 121  *
 122  */
 123
 124 /*
 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_"
 131
 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
 153
 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]
 157
 158 %{
 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
 167 #ifndef HAVE_UNISTD_H
 168 #define YY_NO_UNISTD_H
 169 #endif
 170
 171 #include "wpp_private.h"
 172 #include "ppy.tab.h"
 173
 174 /*
 175  * Make sure that we are running an appropriate version of flex.
 176  */
 177 #if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
 178 #error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
 179 #endif
 180
 181 #define YY_READ_BUF_SIZE        65536           /* So we read most of a file at once */
 182
 183 #define yy_current_state()      YY_START
 184 #define yy_pp_state(x)          yy_pop_state(); yy_push_state(x)
 185
 186 /*
 187  * Always update the current character position within a line
 188  */
 189 #define YY_USER_ACTION  pp_status.char_number+=ppy_leng;
 190
 191 /*
 192  * Buffer management for includes and expansions
 193  */
 194 #define MAXBUFFERSTACK  128     /* Nesting more than 128 includes or macro expansion textss is insane */
 195
 196 typedef struct bufferstackentry {
 197         YY_BUFFER_STATE bufferstate;    /* Buffer to switch back to */
 198         pp_entry_t      *define;        /* Points to expanding define or NULL if handling includes */
 199         int             line_number;    /* Line that we were handling */
 200         int             char_number;    /* The current position on that line */
 201         const char      *filename;      /* Filename that we were handling */
 202         int             if_depth;       /* How many #if:s deep to check matching #endif:s */
 203         int             ncontinuations; /* Remember the continuation state */
 204         int             should_pop;     /* Set if we must pop the start-state on EOF */
 205         /* Include management */
 206         include_state_t incl;
 207         char            *include_filename;
 208 } bufferstackentry_t;
 209
 210 #define ALLOCBLOCKSIZE  (1 << 10)       /* Allocate these chunks at a time for string-buffers */
 211
 212 /*
 213  * Macro expansion nesting
 214  * We need the stack to handle expansions while scanning
 215  * a macro's arguments. The TOS must always be the macro
 216  * that receives the current expansion from the scanner.
 217  */
 218 #define MAXMACEXPSTACK  128     /* Nesting more than 128 macro expansions is insane */
 219
 220 typedef struct macexpstackentry {
 221         pp_entry_t      *ppp;           /* This macro we are scanning */
 222         char            **args;         /* With these arguments */
 223         char            **ppargs;       /* Resulting in these preprocessed arguments */
 224         int             *nnls;          /* Number of newlines per argument */
 225         int             nargs;          /* And this many arguments scanned */
 226         int             parentheses;    /* Nesting level of () */
 227         int             curargsize;     /* Current scanning argument's size */
 228         int             curargalloc;    /* Current scanning argument's block allocated */
 229         char            *curarg;        /* Current scanning argument's content */
 230 } macexpstackentry_t;
 231
 232 #define MACROPARENTHESES()      (top_macro()->parentheses)
 233
 234 /*
 235  * Prototypes
 236  */
 237 static void newline(int);
 238 static int make_number(int radix, YYSTYPE *val, const char *str, int len);
 239 static void put_buffer(const char *s, int len);
 240 /* Buffer management */
 241 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
 242 static bufferstackentry_t *pop_buffer(void);
 243 /* String functions */
 244 static void new_string(void);
 245 static void add_string(const char *str, int len);
 246 static char *get_string(void);
 247 static void put_string(void);
 248 static int string_start(void);
 249 /* Macro functions */
 250 static void push_macro(pp_entry_t *ppp);
 251 static macexpstackentry_t *top_macro(void);
 252 static macexpstackentry_t *pop_macro(void);
 253 static void free_macro(macexpstackentry_t *mep);
 254 static void add_text_to_macro(const char *text, int len);
 255 static void macro_add_arg(int last);
 256 static void macro_add_expansion(void);
 257 /* Expansion */
 258 static void expand_special(pp_entry_t *ppp);
 259 static void expand_define(pp_entry_t *ppp);
 260 static void expand_macro(macexpstackentry_t *mep);
 261
 262 /*
 263  * Local variables
 264  */
 265 static int ncontinuations;
 266
 267 static int strbuf_idx = 0;
 268 static int strbuf_alloc = 0;
 269 static char *strbuffer = NULL;
 270 static int str_startline;
 271
 272 static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
 273 static int macexpstackidx = 0;
 274
 275 static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
 276 static int bufferstackidx = 0;
 277
 278 /*
 279  * Global variables
 280  */
 281 include_state_t pp_incl_state =
 282 {
 283     -1,    /* state */
 284     NULL,  /* ppp */
 285     0,     /* ifdepth */
 286     0      /* seen_junk */
 287 };
 288
 289 includelogicentry_t *pp_includelogiclist = NULL;
 290
 291 %}
 292
 293 /*
 294  **************************************************************************
 295  * The scanner starts here
 296  **************************************************************************
 297  */
 298
 299 %%
 300         /*
 301          * Catch line-continuations.
 302          * Note: Gcc keeps the line-continuations in, for example, strings
 303          * intact. However, I prefer to remove them all so that the next
 304          * scanner will not need to reduce the continuation state.
 305          *
 306          * <*>\\\n              newline(0);
 307          */
 308
 309         /*
 310          * Detect the leading # of a preprocessor directive.
 311          */
 312 <INITIAL,pp_ignore>^{ws}*#      pp_incl_state.seen_junk++; yy_push_state(pp_pp);
 313
 314         /*
 315          * Scan for the preprocessor directives
 316          */
 317 <pp_pp>{ws}*include{ws}*        if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
 318 <pp_pp>{ws}*define{ws}*         yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
 319 <pp_pp>{ws}*error{ws}*          yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tERROR;
 320 <pp_pp>{ws}*warning{ws}*        yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tWARNING;
 321 <pp_pp>{ws}*pragma{ws}*         yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tPRAGMA;
 322 <pp_pp>{ws}*ident{ws}*          yy_pp_state(pp_eol);    if(yy_top_state() != pp_ignore) return tPPIDENT;
 323 <pp_pp>{ws}*undef{ws}*          if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
 324 <pp_pp>{ws}*ifdef{ws}*          yy_pp_state(pp_ifd);    return tIFDEF;
 325 <pp_pp>{ws}*ifndef{ws}*         pp_incl_state.seen_junk--; yy_pp_state(pp_ifd); return tIFNDEF;
 326 <pp_pp>{ws}*if{ws}*             yy_pp_state(pp_if);     return tIF;
 327 <pp_pp>{ws}*elif{ws}*           yy_pp_state(pp_if);     return tELIF;
 328 <pp_pp>{ws}*else{ws}*           yy_pp_state(pp_endif);  return tELSE;
 329 <pp_pp>{ws}*endif{ws}*          yy_pp_state(pp_endif);  return tENDIF;
 330 <pp_pp>{ws}*line{ws}*           if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
 331 <pp_pp>{ws}+                    if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
 332 <pp_pp>{ws}*[a-z]+              ppy_error("Invalid preprocessor token '%s'", ppy_text);
 333 <pp_pp>\r?\n                    newline(1); yy_pop_state(); return tNL; /* This could be the null-token */
 334 <pp_pp>\\\r?\n                  newline(0);
 335 <pp_pp>\\\r?                    ppy_error("Preprocessor junk '%s'", ppy_text);
 336 <pp_pp>.                        return *ppy_text;
 337
 338         /*
 339          * Handle #include and #line
 340          */
 341 <pp_line>[0-9]+                 return make_number(10, &ppy_lval, ppy_text, ppy_leng);
 342 <pp_inc>\<                      new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
 343 <pp_inc,pp_line>\"              new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
 344 <pp_inc,pp_line>{ws}+           ;
 345 <pp_inc,pp_line>\n              newline(1); yy_pop_state(); return tNL;
 346 <pp_inc,pp_line>\\\r?\n         newline(0);
 347 <pp_inc,pp_line>(\\\r?)|(.)     ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
 348
 349         /*
 350          * Ignore all input when a false clause is parsed
 351          */
 352 <pp_ignore>[^#/\\\n]+           ;
 353 <pp_ignore>\n                   newline(1);
 354 <pp_ignore>\\\r?\n              newline(0);
 355 <pp_ignore>(\\\r?)|(.)          ;
 356
 357         /*
 358          * Handle #if and #elif.
 359          * These require conditionals to be evaluated, but we do not
 360          * want to jam the scanner normally when we see these tokens.
 361          * Note: tIDENT is handled below.
 362          */
 363
 364 <pp_if>0[0-7]*{ul}?             return make_number(8, &ppy_lval, ppy_text, ppy_leng);
 365 <pp_if>0[0-7]*[8-9]+{ul}?       ppy_error("Invalid octal digit");
 366 <pp_if>[1-9][0-9]*{ul}?         return make_number(10, &ppy_lval, ppy_text, ppy_leng);
 367 <pp_if>0[xX][0-9a-fA-F]+{ul}?   return make_number(16, &ppy_lval, ppy_text, ppy_leng);
 368 <pp_if>0[xX]                    ppy_error("Invalid hex number");
 369 <pp_if>defined                  yy_push_state(pp_defined); return tDEFINED;
 370 <pp_if>"<<"                     return tLSHIFT;
 371 <pp_if>">>"                     return tRSHIFT;
 372 <pp_if>"&&"                     return tLOGAND;
 373 <pp_if>"||"                     return tLOGOR;
 374 <pp_if>"=="                     return tEQ;
 375 <pp_if>"!="                     return tNE;
 376 <pp_if>"<="                     return tLTE;
 377 <pp_if>">="                     return tGTE;
 378 <pp_if>\n                       newline(1); yy_pop_state(); return tNL;
 379 <pp_if>\\\r?\n                  newline(0);
 380 <pp_if>\\\r?                    ppy_error("Junk in conditional expression");
 381 <pp_if>{ws}+                    ;
 382 <pp_if>\'                       new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
 383 <pp_if>\"                       ppy_error("String constants not allowed in conditionals");
 384 <pp_if>.                        return *ppy_text;
 385
 386         /*
 387          * Handle #ifdef, #ifndef and #undef
 388          * to get only an untranslated/unexpanded identifier
 389          */
 390 <pp_ifd>{cident}        ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
 391 <pp_ifd>{ws}+           ;
 392 <pp_ifd>\n              newline(1); yy_pop_state(); return tNL;
 393 <pp_ifd>\\\r?\n         newline(0);
 394 <pp_ifd>(\\\r?)|(.)     ppy_error("Identifier expected");
 395
 396         /*
 397          * Handle #else and #endif.
 398          */
 399 <pp_endif>{ws}+         ;
 400 <pp_endif>\n            newline(1); yy_pop_state(); return tNL;
 401 <pp_endif>\\\r?\n       newline(0);
 402 <pp_endif>.             ppy_error("Garbage after #else or #endif.");
 403
 404         /*
 405          * Handle the special 'defined' keyword.
 406          * This is necessary to get the identifier prior to any
 407          * substitutions.
 408          */
 409 <pp_defined>{cident}            yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
 410 <pp_defined>{ws}+               ;
 411 <pp_defined>(\()|(\))           return *ppy_text;
 412 <pp_defined>\\\r?\n             newline(0);
 413 <pp_defined>(\\.)|(\n)|(.)      ppy_error("Identifier expected");
 414
 415         /*
 416          * Handle #error, #warning, #pragma and #ident.
 417          * Pass everything literally to the parser, which
 418          * will act appropriately.
 419          * Comments are stripped from the literal text.
 420          */
 421 <pp_eol>[^/\\\n]+               if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
 422 <pp_eol>\/[^/\\\n*]*            if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
 423 <pp_eol>(\\\r?)|(\/[^/*])       if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
 424 <pp_eol>\n                      newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
 425 <pp_eol>\\\r?\n                 newline(0);
 426
 427         /*
 428          * Handle left side of #define
 429          */
 430 <pp_def>{cident}\(              ppy_lval.cptr = pp_xstrdup(ppy_text); ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro);  return tMACRO;
 431 <pp_def>{cident}                ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
 432 <pp_def>{ws}+                   ;
 433 <pp_def>\\\r?\n                 newline(0);
 434 <pp_def>(\\\r?)|(\n)|(.)        perror("Identifier expected");
 435
 436         /*
 437          * Scan the substitution of a define
 438          */
 439 <pp_define>[^'"/\\\n]+          ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
 440 <pp_define>(\\\r?)|(\/[^/*])    ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
 441 <pp_define>\\\r?\n{ws}+         newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
 442 <pp_define>\\\r?\n              newline(0);
 443 <pp_define>\n                   newline(1); yy_pop_state(); return tNL;
 444 <pp_define>\'                   new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
 445 <pp_define>\"                   new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
 446
 447         /*
 448          * Scan the definition macro arguments
 449          */
 450 <pp_macro>\){ws}*               yy_pp_state(pp_mbody); return tMACROEND;
 451 <pp_macro>{ws}+                 ;
 452 <pp_macro>{cident}              ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
 453 <pp_macro>,                     return ',';
 454 <pp_macro>"..."                 return tELIPSIS;
 455 <pp_macro>(\\\r?)|(\n)|(.)|(\.\.?)      ppy_error("Argument identifier expected");
 456 <pp_macro>\\\r?\n               newline(0);
 457
 458         /*
 459          * Scan the substitution of a macro
 460          */
 461 <pp_mbody>[^a-zA-Z0-9'"#/\\\n]+ ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
 462 <pp_mbody>{cident}              ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
 463 <pp_mbody>\#\#                  return tCONCAT;
 464 <pp_mbody>\#                    return tSTRINGIZE;
 465 <pp_mbody>[0-9][^'"#/\\\n]*     ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
 466 <pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*)     ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
 467 <pp_mbody>\\\r?\n{ws}+          newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
 468 <pp_mbody>\\\r?\n               newline(0);
 469 <pp_mbody>\n                    newline(1); yy_pop_state(); return tNL;
 470 <pp_mbody>\'                    new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
 471 <pp_mbody>\"                    new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
 472
 473         /*
 474          * Macro expansion text scanning.
 475          * This state is active just after the identifier is scanned
 476          * that triggers an expansion. We *must* delete the leading
 477          * whitespace before we can start scanning for arguments.
 478          *
 479          * If we do not see a '(' as next trailing token, then we have
 480          * a false alarm. We just continue with a nose-bleed...
 481          */
 482 <pp_macign>{ws}*/\(     yy_pp_state(pp_macscan);
 483 <pp_macign>{ws}*\n      {
 484                 if(yy_top_state() != pp_macscan)
 485                         newline(0);
 486         }
 487 <pp_macign>{ws}*\\\r?\n newline(0);
 488 <pp_macign>{ws}+|{ws}*\\\r?|.   {
 489                 macexpstackentry_t *mac = pop_macro();
 490                 yy_pop_state();
 491                 put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
 492                 put_buffer(ppy_text, ppy_leng);
 493                 free_macro(mac);
 494         }
 495
 496         /*
 497          * Macro expansion argument text scanning.
 498          * This state is active when a macro's arguments are being read for expansion.
 499          */
 500 <pp_macscan>\(  {
 501                 if(++MACROPARENTHESES() > 1)
 502                         add_text_to_macro(ppy_text, ppy_leng);
 503         }
 504 <pp_macscan>\)  {
 505                 if(--MACROPARENTHESES() == 0)
 506                 {
 507                         yy_pop_state();
 508                         macro_add_arg(1);
 509                 }
 510                 else
 511                         add_text_to_macro(ppy_text, ppy_leng);
 512         }
 513 <pp_macscan>,           {
 514                 if(MACROPARENTHESES() > 1)
 515                         add_text_to_macro(ppy_text, ppy_leng);
 516                 else
 517                         macro_add_arg(0);
 518         }
 519 <pp_macscan>\"          new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
 520 <pp_macscan>\'          new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
 521 <pp_macscan>"/*"        yy_push_state(pp_comment); add_text_to_macro(" ", 1);
 522 <pp_macscan>\n          pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
 523 <pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.)    add_text_to_macro(ppy_text, ppy_leng);
 524 <pp_macscan>\\\r?\n     newline(0);
 525
 526         /*
 527          * Comment handling (almost all start-conditions)
 528          */
 529 <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);
 530 <pp_comment>[^*\n]*|"*"+[^*/\n]*        ;
 531 <pp_comment>\n                          newline(0);
 532 <pp_comment>"*"+"/"                     yy_pop_state();
 533
 534         /*
 535          * Remove C++ style comment (almost all start-conditions)
 536          */
 537 <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]* {
 538                 if(ppy_text[ppy_leng-1] == '\\')
 539                         ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
 540         }
 541
 542         /*
 543          * Single, double and <> quoted constants
 544          */
 545 <INITIAL,pp_macexp>\"           pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
 546 <INITIAL,pp_macexp>\'           pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
 547 <pp_dqs>[^"\\\n]+               add_string(ppy_text, ppy_leng);
 548 <pp_dqs>\"                      {
 549                 add_string(ppy_text, ppy_leng);
 550                 yy_pop_state();
 551                 switch(yy_current_state())
 552                 {
 553                 case pp_pp:
 554                 case pp_define:
 555                 case pp_mbody:
 556                 case pp_inc:
 557                 case RCINCL:
 558                         if (yy_current_state()==RCINCL) yy_pop_state();
 559                         ppy_lval.cptr = get_string();
 560                         return tDQSTRING;
 561                 case pp_line:
 562                         ppy_lval.cptr = get_string();
 563                         return tDQSTRING;
 564                 default:
 565                         put_string();
 566                 }
 567         }
 568 <pp_sqs>[^'\\\n]+               add_string(ppy_text, ppy_leng);
 569 <pp_sqs>\'                      {
 570                 add_string(ppy_text, ppy_leng);
 571                 yy_pop_state();
 572                 switch(yy_current_state())
 573                 {
 574                 case pp_if:
 575                 case pp_define:
 576                 case pp_mbody:
 577                         ppy_lval.cptr = get_string();
 578                         return tSQSTRING;
 579                 default:
 580                         put_string();
 581                 }
 582         }
 583 <pp_iqs>[^\>\\\n]+              add_string(ppy_text, ppy_leng);
 584 <pp_iqs>\>                      {
 585                 add_string(ppy_text, ppy_leng);
 586                 yy_pop_state();
 587                 ppy_lval.cptr = get_string();
 588                 return tIQSTRING;
 589         }
 590 <pp_dqs>\\\r?\n         {
 591                 /*
 592                  * This is tricky; we need to remove the line-continuation
 593                  * from preprocessor strings, but OTOH retain them in all
 594                  * other strings. This is because the resource grammar is
 595                  * even more braindead than initially analysed and line-
 596                  * continuations in strings introduce, sigh, newlines in
 597                  * the output. There goes the concept of non-breaking, non-
 598                  * spacing whitespace.
 599                  */
 600                 switch(yy_top_state())
 601                 {
 602                 case pp_pp:
 603                 case pp_define:
 604                 case pp_mbody:
 605                 case pp_inc:
 606                 case pp_line:
 607                         newline(0);
 608                         break;
 609                 default:
 610                         add_string(ppy_text, ppy_leng);
 611                         newline(-1);
 612                 }
 613         }
 614 <pp_iqs,pp_dqs,pp_sqs>\\.       add_string(ppy_text, ppy_leng);
 615 <pp_iqs,pp_dqs,pp_sqs>\n        {
 616                 newline(1);
 617                 add_string(ppy_text, ppy_leng);
 618                 ppy_warning("Newline in string constant encounterd (started line %d)", string_start());
 619         }
 620
 621         /*
 622          * Identifier scanning
 623          */
 624 <INITIAL,pp_if,pp_inc,pp_macexp>{cident}        {
 625                 pp_entry_t *ppp;
 626                 pp_incl_state.seen_junk++;
 627                 if(!(ppp = pplookup(ppy_text)))
 628                 {
 629                         if(yy_current_state() == pp_inc)
 630                                 ppy_error("Expected include filename");
 631
 632                         if(yy_current_state() == pp_if)
 633                         {
 634                                 ppy_lval.cptr = pp_xstrdup(ppy_text);
 635                                 return tIDENT;
 636                         }
 637                         else {
 638                                 if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
 639                                         yy_push_state(RCINCL);
 640                                         return tRCINCLUDE;
 641                                 }
 642                                 else put_buffer(ppy_text, ppy_leng);
 643                         }
 644                 }
 645                 else if(!ppp->expanding)
 646                 {
 647                         switch(ppp->type)
 648                         {
 649                         case def_special:
 650                                 expand_special(ppp);
 651                                 break;
 652                         case def_define:
 653                                 expand_define(ppp);
 654                                 break;
 655                         case def_macro:
 656                                 yy_push_state(pp_macign);
 657                                 push_macro(ppp);
 658                                 break;
 659                         default:
 660                                 pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
 661                         }
 662                 }
 663                 else put_buffer(ppy_text, ppy_leng);
 664         }
 665
 666         /*
 667          * Everything else that needs to be passed and
 668          * newline and continuation handling
 669          */
 670 <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);
 671 <INITIAL,pp_macexp>{ws}+        put_buffer(ppy_text, ppy_leng);
 672 <INITIAL>\n                     newline(1);
 673 <INITIAL>\\\r?\n                newline(0);
 674 <INITIAL>\\\r?                  pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
 675
 676         /*
 677          * Special catcher for macro argmument expansion to prevent
 678          * newlines to propagate to the output or admin.
 679          */
 680 <pp_macexp>(\n)|(.)|(\\\r?(\n|.))       put_buffer(ppy_text, ppy_leng);
 681
 682 <RCINCL>[A-Za-z0-9_\.\\/]+ {
 683                 ppy_lval.cptr=pp_xstrdup(ppy_text);
 684                 yy_pop_state();
 685                 return tRCINCLUDEPATH;
 686         }
 687
 688 <RCINCL>{ws}+ ;
 689
 690 <RCINCL>\"              {
 691                 new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
 692         }
 693
 694         /*
 695          * This is a 'catch-all' rule to discover errors in the scanner
 696          * in an orderly manner.
 697          */
 698 <*>.            pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
 699
 700 <<EOF>> {
 701                 YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
 702                 bufferstackentry_t *bep = pop_buffer();
 703
 704                 if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
 705                         ppy_warning("Unmatched #if/#endif at end of file");
 706
 707                 if(!bep)
 708                 {
 709                         if(YY_START != INITIAL)
 710                                 ppy_error("Unexpected end of file during preprocessing");
 711                         yyterminate();
 712                 }
 713                 else if(bep->should_pop == 2)
 714                 {
 715                         macexpstackentry_t *mac;
 716                         mac = pop_macro();
 717                         expand_macro(mac);
 718                 }
 719                 ppy__delete_buffer(b);
 720         }
 721
 722 %%
 723 /*
 724  **************************************************************************
 725  * Support functions
 726  **************************************************************************
 727  */
 728
 729 #ifndef ppy_wrap
 730 int ppy_wrap(void)
 731 {
 732         return 1;
 733 }
 734 #endif
 735
 736
 737 /*
 738  *-------------------------------------------------------------------------
 739  * Output newlines or set them as continuations
 740  *
 741  * Input: -1 - Don't count this one, but update local position (see pp_dqs)
 742  *         0 - Line-continuation seen and cache output
 743  *         1 - Newline seen and flush output
 744  *-------------------------------------------------------------------------
 745  */
 746 static void newline(int dowrite)
 747 {
 748         pp_status.line_number++;
 749         pp_status.char_number = 1;
 750
 751         if(dowrite == -1)
 752                 return;
 753
 754         ncontinuations++;
 755         if(dowrite)
 756         {
 757                 for(;ncontinuations; ncontinuations--)
 758                         put_buffer("\n", 1);
 759         }
 760 }
 761
 762
 763 /*
 764  *-------------------------------------------------------------------------
 765  * Make a number out of an any-base and suffixed string
 766  *
 767  * Possible number extensions:
 768  * - ""         int
 769  * - "L"        long int
 770  * - "LL"       long long int
 771  * - "U"        unsigned int
 772  * - "UL"       unsigned long int
 773  * - "ULL"      unsigned long long int
 774  * - "LU"       unsigned long int
 775  * - "LLU"      unsigned long long int
 776  * - "LUL"      invalid
 777  *
 778  * FIXME:
 779  * The sizes of resulting 'int' and 'long' are compiler specific.
 780  * I depend on sizeof(int) > 2 here (although a relatively safe
 781  * assumption).
 782  * Long longs are not yet implemented because this is very compiler
 783  * specific and I don't want to think too much about the problems.
 784  *
 785  *-------------------------------------------------------------------------
 786  */
 787 static int make_number(int radix, YYSTYPE *val, const char *str, int len)
 788 {
 789         int is_l  = 0;
 790         int is_ll = 0;
 791         int is_u  = 0;
 792         char ext[4];
 793
 794         ext[3] = '\0';
 795         ext[2] = toupper(str[len-1]);
 796         ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
 797         ext[0] = len > 2 ? toupper(str[len-3]) : ' ';
 798
 799         if(!strcmp(ext, "LUL"))
 800                 ppy_error("Invalid constant suffix");
 801         else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
 802         {
 803                 is_ll++;
 804                 is_u++;
 805         }
 806         else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
 807         {
 808                 is_l++;
 809                 is_u++;
 810         }
 811         else if(!strcmp(ext+1, "LL"))
 812         {
 813                 is_ll++;
 814         }
 815         else if(!strcmp(ext+2, "L"))
 816         {
 817                 is_l++;
 818         }
 819         else if(!strcmp(ext+2, "U"))
 820         {
 821                 is_u++;
 822         }
 823
 824         if(is_ll)
 825         {
 826 /* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
 827 #ifdef HAVE_LONG_LONG
 828                 if (is_u)
 829                 {
 830                         val->ull = strtoull(str, NULL, radix);
 831                         return tULONGLONG;
 832                 }
 833                 else
 834                 {
 835                         val->sll = strtoll(str, NULL, radix);
 836                         return tSLONGLONG;
 837                 }
 838 #else
 839                 pp_internal_error(__FILE__, __LINE__, "long long constants not supported on this platform");
 840 #endif
 841         }
 842         else if(is_u && is_l)
 843         {
 844                 val->ulong = strtoul(str, NULL, radix);
 845                 return tULONG;
 846         }
 847         else if(!is_u && is_l)
 848         {
 849                 val->slong = strtol(str, NULL, radix);
 850                 return tSLONG;
 851         }
 852         else if(is_u && !is_l)
 853         {
 854                 val->uint = (unsigned int)strtoul(str, NULL, radix);
 855                 return tUINT;
 856         }
 857
 858         /* Else it must be an int... */
 859         val->sint = (int)strtol(str, NULL, radix);
 860         return tSINT;
 861 }
 862
 863
 864 /*
 865  *-------------------------------------------------------------------------
 866  * Macro and define expansion support
 867  *
 868  * FIXME: Variable macro arguments.
 869  *-------------------------------------------------------------------------
 870  */
 871 static void expand_special(pp_entry_t *ppp)
 872 {
 873         const char *dbgtext = "?";
 874         static char *buf = NULL;
 875
 876         assert(ppp->type == def_special);
 877
 878         if(!strcmp(ppp->ident, "__LINE__"))
 879         {
 880                 dbgtext = "def_special(__LINE__)";
 881                 buf = pp_xrealloc(buf, 32);
 882                 sprintf(buf, "%d", pp_status.line_number);
 883         }
 884         else if(!strcmp(ppp->ident, "__FILE__"))
 885         {
 886                 dbgtext = "def_special(__FILE__)";
 887                 buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
 888                 sprintf(buf, "\"%s\"", pp_status.input);
 889         }
 890         else
 891                 pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
 892
 893         if(pp_flex_debug)
 894                 fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
 895                         macexpstackidx,
 896                         pp_status.input,
 897                         pp_status.line_number,
 898                         ppp->ident,
 899                         buf ? buf : "");
 900
 901         if(buf && buf[0])
 902         {
 903                 push_buffer(ppp, NULL, NULL, 0);
 904                 yy_scan_string(buf);
 905         }
 906 }
 907
 908 static void expand_define(pp_entry_t *ppp)
 909 {
 910         assert(ppp->type == def_define);
 911
 912         if(pp_flex_debug)
 913                 fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
 914                         macexpstackidx,
 915                         pp_status.input,
 916                         pp_status.line_number,
 917                         ppp->ident,
 918                         ppp->subst.text);
 919         if(ppp->subst.text && ppp->subst.text[0])
 920         {
 921                 push_buffer(ppp, NULL, NULL, 0);
 922                 yy_scan_string(ppp->subst.text);
 923         }
 924 }
 925
 926 static int curdef_idx = 0;
 927 static int curdef_alloc = 0;
 928 static char *curdef_text = NULL;
 929
 930 static void add_text(const char *str, int len)
 931 {
 932         if(len == 0)
 933                 return;
 934         if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
 935         {
 936                 curdef_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
 937                 curdef_text = pp_xrealloc(curdef_text, curdef_alloc * sizeof(curdef_text[0]));
 938                 if(curdef_alloc > 65536)
 939                         ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
 940         }
 941         memcpy(&curdef_text[curdef_idx], str, len);
 942         curdef_idx += len;
 943 }
 944
 945 static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
 946 {
 947         char *cptr;
 948         char *exp;
 949         int tag;
 950         int n;
 951
 952         if(mtp == NULL)
 953                 return NULL;
 954
 955         switch(mtp->type)
 956         {
 957         case exp_text:
 958                 if(pp_flex_debug)
 959                         fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
 960                 add_text(mtp->subst.text, strlen(mtp->subst.text));
 961                 break;
 962
 963         case exp_stringize:
 964                 if(pp_flex_debug)
 965                         fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
 966                                 mtp->subst.argidx,
 967                                 mep->args[mtp->subst.argidx]);
 968                 cptr = mep->args[mtp->subst.argidx];
 969                 add_text("\"", 1);
 970                 while(*cptr)
 971                 {
 972                         if(*cptr == '"' || *cptr == '\\')
 973                                 add_text("\\", 1);
 974                         add_text(cptr, 1);
 975                         cptr++;
 976                 }
 977                 add_text("\"", 1);
 978                 break;
 979
 980         case exp_concat:
 981                 if(pp_flex_debug)
 982                         fprintf(stderr, "add_expand_text: exp_concat\n");
 983                 /* Remove trailing whitespace from current expansion text */
 984                 while(curdef_idx)
 985                 {
 986                         if(isspace(curdef_text[curdef_idx-1] & 0xff))
 987                                 curdef_idx--;
 988                         else
 989                                 break;
 990                 }
 991                 /* tag current position and recursively expand the next part */
 992                 tag = curdef_idx;
 993                 mtp = add_expand_text(mtp->next, mep, nnl);
 994
 995                 /* Now get rid of the leading space of the expansion */
 996                 cptr = &curdef_text[tag];
 997                 n = curdef_idx - tag;
 998                 while(n)
 999                 {
1000                         if(isspace(*cptr & 0xff))
1001                         {
1002                                 cptr++;
1003                                 n--;
1004                         }
1005                         else
1006                                 break;
1007                 }
1008                 if(cptr != &curdef_text[tag])
1009                 {
1010                         memmove(&curdef_text[tag], cptr, n);
1011                         curdef_idx -= (curdef_idx - tag) - n;
1012                 }
1013                 break;
1014
1015         case exp_subst:
1016                 if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
1017                         exp = mep->args[mtp->subst.argidx];
1018                 else
1019                         exp = mep->ppargs[mtp->subst.argidx];
1020                 if(exp)
1021                 {
1022                         add_text(exp, strlen(exp));
1023                         *nnl -= mep->nnls[mtp->subst.argidx];
1024                         cptr = strchr(exp, '\n');
1025                         while(cptr)
1026                         {
1027                                 *cptr = ' ';
1028                                 cptr = strchr(cptr+1, '\n');
1029                         }
1030                         mep->nnls[mtp->subst.argidx] = 0;
1031                 }
1032                 if(pp_flex_debug)
1033                         fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
1034                 break;
1035
1036         default:
1037                 pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
1038         }
1039         return mtp;
1040 }
1041
1042 static void expand_macro(macexpstackentry_t *mep)
1043 {
1044         mtext_t *mtp;
1045         int n, k;
1046         char *cptr;
1047         int nnl = 0;
1048         pp_entry_t *ppp = mep->ppp;
1049         int nargs = mep->nargs;
1050
1051         assert(ppp->type == def_macro);
1052         assert(ppp->expanding == 0);
1053
1054         if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
1055                 ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
1056
1057         for(n = 0; n < nargs; n++)
1058                 nnl += mep->nnls[n];
1059
1060         if(pp_flex_debug)
1061                 fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
1062                         macexpstackidx,
1063                         pp_status.input,
1064                         pp_status.line_number,
1065                         ppp->ident,
1066                         mep->nargs,
1067                         nnl);
1068
1069         curdef_idx = 0;
1070
1071         for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
1072         {
1073                 if(!(mtp = add_expand_text(mtp, mep, &nnl)))
1074                         break;
1075         }
1076
1077         for(n = 0; n < nnl; n++)
1078                 add_text("\n", 1);
1079
1080         /* To make sure there is room and termination (see below) */
1081         add_text(" \0", 2);
1082
1083         /* Strip trailing whitespace from expansion */
1084         for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
1085         {
1086                 if(!isspace(*cptr & 0xff))
1087                         break;
1088         }
1089
1090         /*
1091          * We must add *one* whitespace to make sure that there
1092          * is a token-separation after the expansion.
1093          */
1094         *(++cptr) = ' ';
1095         *(++cptr) = '\0';
1096         k++;
1097
1098         /* Strip leading whitespace from expansion */
1099         for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
1100         {
1101                 if(!isspace(*cptr & 0xff))
1102                         break;
1103         }
1104
1105         if(k - n > 0)
1106         {
1107                 if(pp_flex_debug)
1108                         fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
1109                 push_buffer(ppp, NULL, NULL, 0);
1110                 /*yy_scan_bytes(curdef_text + n, k - n);*/
1111                 yy_scan_string(curdef_text + n);
1112         }
1113 }
1114
1115 /*
1116  *-------------------------------------------------------------------------
1117  * String collection routines
1118  *-------------------------------------------------------------------------
1119  */
1120 static void new_string(void)
1121 {
1122 #ifdef DEBUG
1123         if(strbuf_idx)
1124                 ppy_warning("new_string: strbuf_idx != 0");
1125 #endif
1126         strbuf_idx = 0;
1127         str_startline = pp_status.line_number;
1128 }
1129
1130 static void add_string(const char *str, int len)
1131 {
1132         if(len == 0)
1133                 return;
1134         if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
1135         {
1136                 strbuf_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
1137                 strbuffer = pp_xrealloc(strbuffer, strbuf_alloc * sizeof(strbuffer[0]));
1138                 if(strbuf_alloc > 65536)
1139                         ppy_warning("Reallocating string buffer larger than 64kB");
1140         }
1141         memcpy(&strbuffer[strbuf_idx], str, len);
1142         strbuf_idx += len;
1143 }
1144
1145 static char *get_string(void)
1146 {
1147         char *str = pp_xmalloc(strbuf_idx + 1);
1148         memcpy(str, strbuffer, strbuf_idx);
1149         str[strbuf_idx] = '\0';
1150 #ifdef DEBUG
1151         strbuf_idx = 0;
1152 #endif
1153         return str;
1154 }
1155
1156 static void put_string(void)
1157 {
1158         put_buffer(strbuffer, strbuf_idx);
1159 #ifdef DEBUG
1160         strbuf_idx = 0;
1161 #endif
1162 }
1163
1164 static int string_start(void)
1165 {
1166         return str_startline;
1167 }
1168
1169
1170 /*
1171  *-------------------------------------------------------------------------
1172  * Buffer management
1173  *-------------------------------------------------------------------------
1174  */
1175 static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
1176 {
1177         if(ppy_debug)
1178                 printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
1179         if(bufferstackidx >= MAXBUFFERSTACK)
1180                 pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1181
1182         memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
1183         bufferstack[bufferstackidx].bufferstate = YY_CURRENT_BUFFER;
1184         bufferstack[bufferstackidx].define      = ppp;
1185         bufferstack[bufferstackidx].line_number = pp_status.line_number;
1186         bufferstack[bufferstackidx].char_number = pp_status.char_number;
1187         bufferstack[bufferstackidx].if_depth    = pp_get_if_depth();
1188         bufferstack[bufferstackidx].should_pop  = pop;
1189         bufferstack[bufferstackidx].filename    = pp_status.input;
1190         bufferstack[bufferstackidx].ncontinuations      = ncontinuations;
1191         bufferstack[bufferstackidx].incl                = pp_incl_state;
1192         bufferstack[bufferstackidx].include_filename    = incname;
1193
1194         if(ppp)
1195                 ppp->expanding = 1;
1196         else if(filename)
1197         {
1198                 /* These will track the ppy_error to the correct file and line */
1199                 pp_status.line_number = 1;
1200                 pp_status.char_number = 1;
1201                 pp_status.input  = filename;
1202                 ncontinuations = 0;
1203         }
1204         else if(!pop)
1205                 pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1206         bufferstackidx++;
1207 }
1208
1209 static bufferstackentry_t *pop_buffer(void)
1210 {
1211         if(bufferstackidx < 0)
1212                 pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1213
1214         if(bufferstackidx == 0)
1215                 return NULL;
1216
1217         bufferstackidx--;
1218
1219         if(bufferstack[bufferstackidx].define)
1220                 bufferstack[bufferstackidx].define->expanding = 0;
1221         else
1222         {
1223                 pp_status.line_number = bufferstack[bufferstackidx].line_number;
1224                 pp_status.char_number = bufferstack[bufferstackidx].char_number;
1225                 pp_status.input  = bufferstack[bufferstackidx].filename;
1226                 ncontinuations = bufferstack[bufferstackidx].ncontinuations;
1227                 if(!bufferstack[bufferstackidx].should_pop)
1228                 {
1229                         fclose(ppy_in);
1230                         fprintf(ppy_out, "# %d \"%s\" 2\n", pp_status.line_number, pp_status.input);
1231
1232                         /* We have EOF, check the include logic */
1233                         if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1234                         {
1235                                 pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1236                                 if(ppp)
1237                                 {
1238                                         includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1239                                         iep->ppp = ppp;
1240                                         ppp->iep = iep;
1241                                         iep->filename = bufferstack[bufferstackidx].include_filename;
1242                                         iep->prev = NULL;
1243                                         iep->next = pp_includelogiclist;
1244                                         if(iep->next)
1245                                                 iep->next->prev = iep;
1246                                         pp_includelogiclist = iep;
1247                                         if(pp_status.debug)
1248                                                 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);
1249                                 }
1250                                 else
1251                                         free(bufferstack[bufferstackidx].include_filename);
1252                         }
1253                         free(pp_incl_state.ppp);
1254                         pp_incl_state   = bufferstack[bufferstackidx].incl;
1255
1256                 }
1257         }
1258
1259         if(ppy_debug)
1260                 printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
1261                         bufferstackidx,
1262                         bufferstack[bufferstackidx].bufferstate,
1263                         bufferstack[bufferstackidx].define,
1264                         bufferstack[bufferstackidx].line_number,
1265                         bufferstack[bufferstackidx].char_number,
1266                         bufferstack[bufferstackidx].if_depth,
1267                         bufferstack[bufferstackidx].filename,
1268                         bufferstack[bufferstackidx].should_pop);
1269
1270         ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1271
1272         if(bufferstack[bufferstackidx].should_pop)
1273         {
1274                 if(yy_current_state() == pp_macexp)
1275                         macro_add_expansion();
1276                 else
1277                         pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1278                 yy_pop_state();
1279         }
1280
1281         return &bufferstack[bufferstackidx];
1282 }
1283
1284
1285 /*
1286  *-------------------------------------------------------------------------
1287  * Macro nestng support
1288  *-------------------------------------------------------------------------
1289  */
1290 static void push_macro(pp_entry_t *ppp)
1291 {
1292         if(macexpstackidx >= MAXMACEXPSTACK)
1293                 ppy_error("Too many nested macros");
1294
1295         macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
1296         memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1297         macexpstack[macexpstackidx]->ppp = ppp;
1298         macexpstackidx++;
1299 }
1300
1301 static macexpstackentry_t *top_macro(void)
1302 {
1303         return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
1304 }
1305
1306 static macexpstackentry_t *pop_macro(void)
1307 {
1308         if(macexpstackidx <= 0)
1309                 pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1310         return macexpstack[--macexpstackidx];
1311 }
1312
1313 static void free_macro(macexpstackentry_t *mep)
1314 {
1315         int i;
1316
1317         for(i = 0; i < mep->nargs; i++)
1318                 free(mep->args[i]);
1319         free(mep->args);
1320         free(mep->nnls);
1321         free(mep->curarg);
1322         free(mep);
1323 }
1324
1325 static void add_text_to_macro(const char *text, int len)
1326 {
1327         macexpstackentry_t *mep = top_macro();
1328
1329         assert(mep->ppp->expanding == 0);
1330
1331         if(mep->curargalloc - mep->curargsize <= len+1) /* +1 for '\0' */
1332         {
1333                 mep->curargalloc += (ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1;
1334                 mep->curarg = pp_xrealloc(mep->curarg, mep->curargalloc * sizeof(mep->curarg[0]));
1335         }
1336         memcpy(mep->curarg + mep->curargsize, text, len);
1337         mep->curargsize += len;
1338         mep->curarg[mep->curargsize] = '\0';
1339 }
1340
1341 static void macro_add_arg(int last)
1342 {
1343         int nnl = 0;
1344         char *cptr;
1345         macexpstackentry_t *mep = top_macro();
1346
1347         assert(mep->ppp->expanding == 0);
1348
1349         mep->args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
1350         mep->ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
1351         mep->nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
1352         mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1353         cptr = mep->args[mep->nargs]-1;
1354         while((cptr = strchr(cptr+1, '\n')))
1355         {
1356                 nnl++;
1357         }
1358         mep->nnls[mep->nargs] = nnl;
1359         mep->nargs++;
1360         free(mep->curarg);
1361         mep->curargalloc = mep->curargsize = 0;
1362         mep->curarg = NULL;
1363
1364         if(pp_flex_debug)
1365                 fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1366                         pp_status.input,
1367                         pp_status.line_number,
1368                         mep->nargs-1,
1369                         mep->args[mep->nargs-1]);
1370
1371         /* Each macro argument must be expanded to cope with stingize */
1372         if(last || mep->args[mep->nargs-1][0])
1373         {
1374                 yy_push_state(pp_macexp);
1375                 push_buffer(NULL, NULL, NULL, last ? 2 : 1);
1376                 yy_scan_string(mep->args[mep->nargs-1]);
1377                 /*mep->bufferstackidx = bufferstackidx;  But not nested! */
1378         }
1379 }
1380
1381 static void macro_add_expansion(void)
1382 {
1383         macexpstackentry_t *mep = top_macro();
1384
1385         assert(mep->ppp->expanding == 0);
1386
1387         mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1388         free(mep->curarg);
1389         mep->curargalloc = mep->curargsize = 0;
1390         mep->curarg = NULL;
1391
1392         if(pp_flex_debug)
1393                 fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1394                         pp_status.input,
1395                         pp_status.line_number,
1396                         mep->nargs-1,
1397                         mep->ppargs[mep->nargs-1]);
1398 }
1399
1400
1401 /*
1402  *-------------------------------------------------------------------------
1403  * Output management
1404  *-------------------------------------------------------------------------
1405  */
1406 static void put_buffer(const char *s, int len)
1407 {
1408         if(top_macro())
1409                 add_text_to_macro(s, len);
1410         else
1411            fwrite(s, 1, len, ppy_out);
1412 }
1413
1414
1415 /*
1416  *-------------------------------------------------------------------------
1417  * Include management
1418  *-------------------------------------------------------------------------
1419  */
1420 void pp_do_include(char *fname, int type)
1421 {
1422         char *newpath;
1423         int n;
1424         includelogicentry_t *iep;
1425
1426         for(iep = pp_includelogiclist; iep; iep = iep->next)
1427         {
1428                 if(!strcmp(iep->filename, fname))
1429                 {
1430                         /*
1431                          * We are done. The file was included before.
1432                          * If the define was deleted, then this entry would have
1433                          * been deleted too.
1434                          */
1435                         return;
1436                 }
1437         }
1438
1439         n = strlen(fname);
1440
1441         if(n <= 2)
1442                 ppy_error("Empty include filename");
1443
1444         /* Undo the effect of the quotation */
1445         fname[n-1] = '\0';
1446
1447         if((ppy_in = pp_open_include(fname+1, type ? pp_status.input : NULL, &newpath)) == NULL)
1448                 ppy_error("Unable to open include file %s", fname+1);
1449
1450         fname[n-1] = *fname;    /* Redo the quotes */
1451         push_buffer(NULL, newpath, fname, 0);
1452         pp_incl_state.seen_junk = 0;
1453         pp_incl_state.state = 0;
1454         pp_incl_state.ppp = NULL;
1455
1456         if(pp_status.debug)
1457                 fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
1458                         pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
1459         ppy__switch_to_buffer(ppy__create_buffer(ppy_in, YY_BUF_SIZE));
1460
1461         fprintf(ppy_out, "# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1462 }
1463
1464 /*
1465  *-------------------------------------------------------------------------
1466  * Push/pop preprocessor ignore state when processing conditionals
1467  * which are false.
1468  *-------------------------------------------------------------------------
1469  */
1470 void pp_push_ignore_state(void)
1471 {
1472         yy_push_state(pp_ignore);
1473 }
1474
1475 void pp_pop_ignore_state(void)
1476 {
1477         yy_pop_state();
1478 }