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   1 /*
   2  * Wrc preprocessor syntax analysis
   3  *
   4  * Copyright 1999-2000  Bertho A. Stultiens (BS)
   5  *
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * History:
  22  * 24-Apr-2000 BS       Restructured the lot to fit the new scanner
  23  *                      and reintegrate into the wine-tree.
  24  * 01-Jan-2000 BS       FIXME: win16 preprocessor calculates with
  25  *                      16 bit ints and overflows...?
  26  * 26-Dec-1999 BS       Started this file
  27  *
  28  */
  29
  30 %{
  31 #include "config.h"
  32 #include "wine/port.h"
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <stdarg.h>
  37 #include <assert.h>
  38 #include <ctype.h>
  39 #include <string.h>
  40
  41 #include "wpp_private.h"
  42
  43
  44 #define UNARY_OP(r, v, OP)                                      \
  45         switch(v.type)                                          \
  46         {                                                       \
  47         case cv_sint:   r.val.si  = OP v.val.si; break;         \
  48         case cv_uint:   r.val.ui  = OP v.val.ui; break;         \
  49         case cv_slong:  r.val.sl  = OP v.val.sl; break;         \
  50         case cv_ulong:  r.val.ul  = OP v.val.ul; break;         \
  51         case cv_sll:    r.val.sll = OP v.val.sll; break;        \
  52         case cv_ull:    r.val.ull = OP v.val.ull; break;        \
  53         }
  54
  55 #define cv_signed(v)    ((v.type & FLAG_SIGNED) != 0)
  56
  57 #define BIN_OP_INT(r, v1, v2, OP)                       \
  58         r.type = v1.type;                               \
  59         if(cv_signed(v1) && cv_signed(v2))              \
  60                 r.val.si = v1.val.si OP v2.val.si;      \
  61         else if(cv_signed(v1) && !cv_signed(v2))        \
  62                 r.val.si = v1.val.si OP v2.val.ui;      \
  63         else if(!cv_signed(v1) && cv_signed(v2))        \
  64                 r.val.ui = v1.val.ui OP v2.val.si;      \
  65         else                                            \
  66                 r.val.ui = v1.val.ui OP v2.val.ui;
  67
  68 #define BIN_OP_LONG(r, v1, v2, OP)                      \
  69         r.type = v1.type;                               \
  70         if(cv_signed(v1) && cv_signed(v2))              \
  71                 r.val.sl = v1.val.sl OP v2.val.sl;      \
  72         else if(cv_signed(v1) && !cv_signed(v2))        \
  73                 r.val.sl = v1.val.sl OP v2.val.ul;      \
  74         else if(!cv_signed(v1) && cv_signed(v2))        \
  75                 r.val.ul = v1.val.ul OP v2.val.sl;      \
  76         else                                            \
  77                 r.val.ul = v1.val.ul OP v2.val.ul;
  78
  79 #define BIN_OP_LONGLONG(r, v1, v2, OP)                  \
  80         r.type = v1.type;                               \
  81         if(cv_signed(v1) && cv_signed(v2))              \
  82                 r.val.sll = v1.val.sll OP v2.val.sll;   \
  83         else if(cv_signed(v1) && !cv_signed(v2))        \
  84                 r.val.sll = v1.val.sll OP v2.val.ull;   \
  85         else if(!cv_signed(v1) && cv_signed(v2))        \
  86                 r.val.ull = v1.val.ull OP v2.val.sll;   \
  87         else                                            \
  88                 r.val.ull = v1.val.ull OP v2.val.ull;
  89
  90 #define BIN_OP(r, v1, v2, OP)                                           \
  91         switch(v1.type & SIZE_MASK)                                     \
  92         {                                                               \
  93         case SIZE_INT:          BIN_OP_INT(r, v1, v2, OP); break;       \
  94         case SIZE_LONG:         BIN_OP_LONG(r, v1, v2, OP); break;      \
  95         case SIZE_LONGLONG:     BIN_OP_LONGLONG(r, v1, v2, OP); break;  \
  96         default: pp_internal_error(__FILE__, __LINE__, "Invalid type indicator (0x%04x)", v1.type);     \
  97         }
  98
  99
 100 /*
 101  * Prototypes
 102  */
 103 static int boolean(cval_t *v);
 104 static void promote_equal_size(cval_t *v1, cval_t *v2);
 105 static void cast_to_sint(cval_t *v);
 106 static void cast_to_uint(cval_t *v);
 107 static void cast_to_slong(cval_t *v);
 108 static void cast_to_ulong(cval_t *v);
 109 static void cast_to_sll(cval_t *v);
 110 static void cast_to_ull(cval_t *v);
 111 static marg_t *new_marg(char *str, def_arg_t type);
 112 static marg_t *add_new_marg(char *str, def_arg_t type);
 113 static int marg_index(char *id);
 114 static mtext_t *new_mtext(char *str, int idx, def_exp_t type);
 115 static mtext_t *combine_mtext(mtext_t *tail, mtext_t *mtp);
 116 static char *merge_text(char *s1, char *s2);
 117
 118 /*
 119  * Local variables
 120  */
 121 static marg_t **macro_args;     /* Macro parameters array while parsing */
 122 static int      nmacro_args;
 123
 124 %}
 125
 126 %union{
 127         int             sint;
 128         unsigned int    uint;
 129         long            slong;
 130         unsigned long   ulong;
 131         wrc_sll_t       sll;
 132         wrc_ull_t       ull;
 133         int             *iptr;
 134         char            *cptr;
 135         cval_t          cval;
 136         marg_t          *marg;
 137         mtext_t         *mtext;
 138 }
 139
 140 %token tRCINCLUDE
 141 %token tIF tIFDEF tIFNDEF tELSE tELIF tENDIF tDEFINED tNL
 142 %token tINCLUDE tLINE tGCCLINE tERROR tWARNING tPRAGMA tPPIDENT
 143 %token tUNDEF tMACROEND tCONCAT tELIPSIS tSTRINGIZE
 144 %token <cptr> tIDENT tLITERAL tMACRO tDEFINE
 145 %token <cptr> tDQSTRING tSQSTRING tIQSTRING
 146 %token <uint> tUINT
 147 %token <sint> tSINT
 148 %token <ulong> tULONG
 149 %token <slong> tSLONG
 150 %token <ull> tULONGLONG
 151 %token <sll> tSLONGLONG
 152 %token <cptr> tRCINCLUDEPATH
 153
 154 %right '?' ':'
 155 %left tLOGOR
 156 %left tLOGAND
 157 %left '|'
 158 %left '^'
 159 %left '&'
 160 %left tEQ tNE
 161 %left '<' tLTE '>' tGTE
 162 %left tLSHIFT tRSHIFT
 163 %left '+' '-'
 164 %left '*' '/'
 165 %right '~' '!'
 166
 167 %type <cval>    pp_expr
 168 %type <marg>    emargs margs
 169 %type <mtext>   opt_mtexts mtexts mtext
 170 %type <sint>    allmargs
 171 %type <cptr>    opt_text text
 172
 173 /*
 174  **************************************************************************
 175  * The parser starts here
 176  **************************************************************************
 177  */
 178
 179 %%
 180
 181 pp_file : /* Empty */
 182         | pp_file preprocessor
 183         ;
 184
 185 preprocessor
 186         : tINCLUDE tDQSTRING tNL        { pp_do_include($2, 1); }
 187         | tINCLUDE tIQSTRING tNL        { pp_do_include($2, 0); }
 188         | tIF pp_expr tNL       { pp_next_if_state(boolean(&$2)); }
 189         | tIFDEF tIDENT tNL     { pp_next_if_state(pplookup($2) != NULL); free($2); }
 190         | tIFNDEF tIDENT tNL    {
 191                 int t = pplookup($2) == NULL;
 192                 if(pp_incl_state.state == 0 && t && !pp_incl_state.seen_junk)
 193                 {
 194                         pp_incl_state.state     = 1;
 195                         pp_incl_state.ppp       = $2;
 196                         pp_incl_state.ifdepth   = pp_get_if_depth();
 197                 }
 198                 else if(pp_incl_state.state != 1)
 199                 {
 200                         pp_incl_state.state = -1;
 201                         free($2);
 202                 }
 203                 else
 204                         free($2);
 205                 pp_next_if_state(t);
 206                 if(pp_status.debug)
 207                         fprintf(stderr, "tIFNDEF: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
 208                                 pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
 209                 }
 210         | tELIF pp_expr tNL     {
 211                 pp_if_state_t s = pp_pop_if();
 212                 switch(s)
 213                 {
 214                 case if_true:
 215                 case if_elif:
 216                         pp_push_if(if_elif);
 217                         break;
 218                 case if_false:
 219                         pp_push_if(boolean(&$2) ? if_true : if_false);
 220                         break;
 221                 case if_ignore:
 222                         pp_push_if(if_ignore);
 223                         break;
 224                 case if_elsetrue:
 225                 case if_elsefalse:
 226                         pperror("#elif cannot follow #else");
 227                 default:
 228                         pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d) in #elif directive", s);
 229                 }
 230                 }
 231         | tELSE tNL             {
 232                 pp_if_state_t s = pp_pop_if();
 233                 switch(s)
 234                 {
 235                 case if_true:
 236                         pp_push_if(if_elsefalse);
 237                         break;
 238                 case if_elif:
 239                         pp_push_if(if_elif);
 240                         break;
 241                 case if_false:
 242                         pp_push_if(if_elsetrue);
 243                         break;
 244                 case if_ignore:
 245                         pp_push_if(if_ignore);
 246                         break;
 247                 case if_elsetrue:
 248                 case if_elsefalse:
 249                         pperror("#else clause already defined");
 250                 default:
 251                         pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d) in #else directive", s);
 252                 }
 253                 }
 254         | tENDIF tNL            {
 255                 pp_pop_if();
 256                 if(pp_incl_state.ifdepth == pp_get_if_depth() && pp_incl_state.state == 1)
 257                 {
 258                         pp_incl_state.state = 2;
 259                         pp_incl_state.seen_junk = 0;
 260                 }
 261                 else if(pp_incl_state.state != 1)
 262                 {
 263                         pp_incl_state.state = -1;
 264                 }
 265                 if(pp_status.debug)
 266                         fprintf(stderr, "tENDIF: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n",
 267                                 pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth);
 268                 }
 269         | tUNDEF tIDENT tNL     { pp_del_define($2); free($2); }
 270         | tDEFINE opt_text tNL  { pp_add_define($1, $2); }
 271         | tMACRO res_arg allmargs tMACROEND opt_mtexts tNL      {
 272                 pp_add_macro($1, macro_args, nmacro_args, $5);
 273                 }
 274         | tLINE tSINT tDQSTRING tNL     { fprintf(ppout, "# %d %s\n", $2 , $3); free($3); }
 275         | tGCCLINE tSINT tDQSTRING tNL  { fprintf(ppout, "# %d %s\n", $2 , $3); free($3); }
 276         | tGCCLINE tSINT tDQSTRING tSINT tNL
 277                 { fprintf(ppout, "# %d %s %d\n", $2, $3, $4); free($3); }
 278         | tGCCLINE tSINT tDQSTRING tSINT tSINT tNL
 279                 { fprintf(ppout, "# %d %s %d %d\n", $2 ,$3, $4, $5); free($3); }
 280         | tGCCLINE tSINT tDQSTRING tSINT tSINT tSINT  tNL
 281                 { fprintf(ppout, "# %d %s %d %d %d\n", $2 ,$3 ,$4 ,$5, $6); free($3); }
 282         | tGCCLINE tSINT tDQSTRING tSINT tSINT tSINT tSINT tNL
 283                 { fprintf(ppout, "# %d %s %d %d %d %d\n", $2 ,$3 ,$4 ,$5, $6, $7); free($3); }
 284         | tGCCLINE tNL          /* The null-token */
 285         | tERROR opt_text tNL   { pperror("#error directive: '%s'", $2); if($2) free($2); }
 286         | tWARNING opt_text tNL { ppwarning("#warning directive: '%s'", $2); if($2) free($2); }
 287         | tPRAGMA opt_text tNL  { fprintf(ppout, "#pragma %s\n", $2 ? $2 : ""); if ($2) free($2); }
 288         | tPPIDENT opt_text tNL { if(pp_status.pedantic) ppwarning("#ident ignored (arg: '%s')", $2); if($2) free($2); }
 289         | tRCINCLUDE tRCINCLUDEPATH {
 290                 int nl=strlen($2) +3;
 291                 char *fn=pp_xmalloc(nl);
 292                 sprintf(fn,"\"%s\"",$2);
 293                 free($2);
 294                 pp_do_include(fn,1);
 295         }
 296         | tRCINCLUDE tDQSTRING {
 297                 pp_do_include($2,1);
 298         }
 299         /*| tNL*/
 300         ;
 301
 302 opt_text: /* Empty */   { $$ = NULL; }
 303         | text          { $$ = $1; }
 304         ;
 305
 306 text    : tLITERAL              { $$ = $1; }
 307         | tDQSTRING             { $$ = $1; }
 308         | tSQSTRING             { $$ = $1; }
 309         | text tLITERAL         { $$ = merge_text($1, $2); }
 310         | text tDQSTRING        { $$ = merge_text($1, $2); }
 311         | text tSQSTRING        { $$ = merge_text($1, $2); }
 312         ;
 313
 314 res_arg : /* Empty */   { macro_args = NULL; nmacro_args = 0; }
 315         ;
 316
 317 allmargs: /* Empty */           { $$ = 0; macro_args = NULL; nmacro_args = 0; }
 318         | emargs                { $$ = nmacro_args; }
 319         ;
 320
 321 emargs  : margs                 { $$ = $1; }
 322         | margs ',' tELIPSIS    { $$ = add_new_marg(NULL, arg_list); nmacro_args *= -1; }
 323         ;
 324
 325 margs   : margs ',' tIDENT      { $$ = add_new_marg($3, arg_single); }
 326         | tIDENT                { $$ = add_new_marg($1, arg_single); }
 327         ;
 328
 329 opt_mtexts
 330         : /* Empty */   { $$ = NULL; }
 331         | mtexts        {
 332                 for($$ = $1; $$ && $$->prev; $$ = $$->prev)
 333                         ;
 334                 }
 335         ;
 336
 337 mtexts  : mtext         { $$ = $1; }
 338         | mtexts mtext  { $$ = combine_mtext($1, $2); }
 339         ;
 340
 341 mtext   : tLITERAL      { $$ = new_mtext($1, 0, exp_text); }
 342         | tDQSTRING     { $$ = new_mtext($1, 0, exp_text); }
 343         | tSQSTRING     { $$ = new_mtext($1, 0, exp_text); }
 344         | tCONCAT       { $$ = new_mtext(NULL, 0, exp_concat); }
 345         | tSTRINGIZE tIDENT     {
 346                 int mat = marg_index($2);
 347                 if(mat < 0)
 348                         pperror("Stringification identifier must be an argument parameter");
 349                 $$ = new_mtext(NULL, mat, exp_stringize);
 350                 }
 351         | tIDENT        {
 352                 int mat = marg_index($1);
 353                 if(mat >= 0)
 354                         $$ = new_mtext(NULL, mat, exp_subst);
 355                 else
 356                         $$ = new_mtext($1, 0, exp_text);
 357                 }
 358         ;
 359
 360 pp_expr : tSINT                         { $$.type = cv_sint;  $$.val.si = $1; }
 361         | tUINT                         { $$.type = cv_uint;  $$.val.ui = $1; }
 362         | tSLONG                        { $$.type = cv_slong; $$.val.sl = $1; }
 363         | tULONG                        { $$.type = cv_ulong; $$.val.ul = $1; }
 364         | tSLONGLONG                    { $$.type = cv_sll;   $$.val.sl = $1; }
 365         | tULONGLONG                    { $$.type = cv_ull;   $$.val.ul = $1; }
 366         | tDEFINED tIDENT               { $$.type = cv_sint;  $$.val.si = pplookup($2) != NULL; }
 367         | tDEFINED '(' tIDENT ')'       { $$.type = cv_sint;  $$.val.si = pplookup($3) != NULL; }
 368         | tIDENT                        { $$.type = cv_sint;  $$.val.si = 0; }
 369         | pp_expr tLOGOR pp_expr        { $$.type = cv_sint; $$.val.si = boolean(&$1) || boolean(&$3); }
 370         | pp_expr tLOGAND pp_expr       { $$.type = cv_sint; $$.val.si = boolean(&$1) && boolean(&$3); }
 371         | pp_expr tEQ pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, ==) }
 372         | pp_expr tNE pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, !=) }
 373         | pp_expr '<' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  <) }
 374         | pp_expr '>' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  >) }
 375         | pp_expr tLTE pp_expr          { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, <=) }
 376         | pp_expr tGTE pp_expr          { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, >=) }
 377         | pp_expr '+' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  +) }
 378         | pp_expr '-' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  -) }
 379         | pp_expr '^' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  ^) }
 380         | pp_expr '&' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  &) }
 381         | pp_expr '|' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  |) }
 382         | pp_expr '*' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  *) }
 383         | pp_expr '/' pp_expr           { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3,  /) }
 384         | pp_expr tLSHIFT pp_expr       { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, <<) }
 385         | pp_expr tRSHIFT pp_expr       { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, >>) }
 386         | '+' pp_expr                   { $$ =  $2; }
 387         | '-' pp_expr                   { UNARY_OP($$, $2, -) }
 388         | '~' pp_expr                   { UNARY_OP($$, $2, ~) }
 389         | '!' pp_expr                   { $$.type = cv_sint; $$.val.si = !boolean(&$2); }
 390         | '(' pp_expr ')'               { $$ =  $2; }
 391         | pp_expr '?' pp_expr ':' pp_expr { $$ = boolean(&$1) ? $3 : $5; }
 392         ;
 393
 394 %%
 395
 396 /*
 397  **************************************************************************
 398  * Support functions
 399  **************************************************************************
 400  */
 401
 402 static void cast_to_sint(cval_t *v)
 403 {
 404         switch(v->type)
 405         {
 406         case cv_sint:   break;
 407         case cv_uint:   break;
 408         case cv_slong:  v->val.si = v->val.sl;  break;
 409         case cv_ulong:  v->val.si = v->val.ul;  break;
 410         case cv_sll:    v->val.si = v->val.sll; break;
 411         case cv_ull:    v->val.si = v->val.ull; break;
 412         }
 413         v->type = cv_sint;
 414 }
 415
 416 static void cast_to_uint(cval_t *v)
 417 {
 418         switch(v->type)
 419         {
 420         case cv_sint:   break;
 421         case cv_uint:   break;
 422         case cv_slong:  v->val.ui = v->val.sl;  break;
 423         case cv_ulong:  v->val.ui = v->val.ul;  break;
 424         case cv_sll:    v->val.ui = v->val.sll; break;
 425         case cv_ull:    v->val.ui = v->val.ull; break;
 426         }
 427         v->type = cv_uint;
 428 }
 429
 430 static void cast_to_slong(cval_t *v)
 431 {
 432         switch(v->type)
 433         {
 434         case cv_sint:   v->val.sl = v->val.si;  break;
 435         case cv_uint:   v->val.sl = v->val.ui;  break;
 436         case cv_slong:  break;
 437         case cv_ulong:  break;
 438         case cv_sll:    v->val.sl = v->val.sll; break;
 439         case cv_ull:    v->val.sl = v->val.ull; break;
 440         }
 441         v->type = cv_slong;
 442 }
 443
 444 static void cast_to_ulong(cval_t *v)
 445 {
 446         switch(v->type)
 447         {
 448         case cv_sint:   v->val.ul = v->val.si;  break;
 449         case cv_uint:   v->val.ul = v->val.ui;  break;
 450         case cv_slong:  break;
 451         case cv_ulong:  break;
 452         case cv_sll:    v->val.ul = v->val.sll; break;
 453         case cv_ull:    v->val.ul = v->val.ull; break;
 454         }
 455         v->type = cv_ulong;
 456 }
 457
 458 static void cast_to_sll(cval_t *v)
 459 {
 460         switch(v->type)
 461         {
 462         case cv_sint:   v->val.sll = v->val.si; break;
 463         case cv_uint:   v->val.sll = v->val.ui; break;
 464         case cv_slong:  v->val.sll = v->val.sl; break;
 465         case cv_ulong:  v->val.sll = v->val.ul; break;
 466         case cv_sll:    break;
 467         case cv_ull:    break;
 468         }
 469         v->type = cv_sll;
 470 }
 471
 472 static void cast_to_ull(cval_t *v)
 473 {
 474         switch(v->type)
 475         {
 476         case cv_sint:   v->val.ull = v->val.si; break;
 477         case cv_uint:   v->val.ull = v->val.ui; break;
 478         case cv_slong:  v->val.ull = v->val.sl; break;
 479         case cv_ulong:  v->val.ull = v->val.ul; break;
 480         case cv_sll:    break;
 481         case cv_ull:    break;
 482         }
 483         v->type = cv_ull;
 484 }
 485
 486
 487 static void promote_equal_size(cval_t *v1, cval_t *v2)
 488 {
 489 #define cv_sizeof(v)    ((int)(v->type & SIZE_MASK))
 490         int s1 = cv_sizeof(v1);
 491         int s2 = cv_sizeof(v2);
 492 #undef cv_sizeof
 493
 494         if(s1 == s2)
 495                 return;
 496         else if(s1 > s2)
 497         {
 498                 switch(v1->type)
 499                 {
 500                 case cv_sint:   cast_to_sint(v2); break;
 501                 case cv_uint:   cast_to_uint(v2); break;
 502                 case cv_slong:  cast_to_slong(v2); break;
 503                 case cv_ulong:  cast_to_ulong(v2); break;
 504                 case cv_sll:    cast_to_sll(v2); break;
 505                 case cv_ull:    cast_to_ull(v2); break;
 506                 }
 507         }
 508         else
 509         {
 510                 switch(v2->type)
 511                 {
 512                 case cv_sint:   cast_to_sint(v1); break;
 513                 case cv_uint:   cast_to_uint(v1); break;
 514                 case cv_slong:  cast_to_slong(v1); break;
 515                 case cv_ulong:  cast_to_ulong(v1); break;
 516                 case cv_sll:    cast_to_sll(v1); break;
 517                 case cv_ull:    cast_to_ull(v1); break;
 518                 }
 519         }
 520 }
 521
 522
 523 static int boolean(cval_t *v)
 524 {
 525         switch(v->type)
 526         {
 527         case cv_sint:   return v->val.si != (int)0;
 528         case cv_uint:   return v->val.ui != (unsigned int)0;
 529         case cv_slong:  return v->val.sl != (long)0;
 530         case cv_ulong:  return v->val.ul != (unsigned long)0;
 531         case cv_sll:    return v->val.sll != (wrc_sll_t)0;
 532         case cv_ull:    return v->val.ull != (wrc_ull_t)0;
 533         }
 534         return 0;
 535 }
 536
 537 static marg_t *new_marg(char *str, def_arg_t type)
 538 {
 539         marg_t *ma = pp_xmalloc(sizeof(marg_t));
 540         ma->arg = str;
 541         ma->type = type;
 542         ma->nnl = 0;
 543         return ma;
 544 }
 545
 546 static marg_t *add_new_marg(char *str, def_arg_t type)
 547 {
 548         marg_t *ma = new_marg(str, type);
 549         nmacro_args++;
 550         macro_args = pp_xrealloc(macro_args, nmacro_args * sizeof(macro_args[0]));
 551         macro_args[nmacro_args-1] = ma;
 552         return ma;
 553 }
 554
 555 static int marg_index(char *id)
 556 {
 557         int t;
 558         for(t = 0; t < nmacro_args; t++)
 559         {
 560                 if(!strcmp(id, macro_args[t]->arg))
 561                         break;
 562         }
 563         return t < nmacro_args ? t : -1;
 564 }
 565
 566 static mtext_t *new_mtext(char *str, int idx, def_exp_t type)
 567 {
 568         mtext_t *mt = pp_xmalloc(sizeof(mtext_t));
 569         if(str == NULL)
 570                 mt->subst.argidx = idx;
 571         else
 572                 mt->subst.text = str;
 573         mt->type = type;
 574         mt->next = mt->prev = NULL;
 575         return mt;
 576 }
 577
 578 static mtext_t *combine_mtext(mtext_t *tail, mtext_t *mtp)
 579 {
 580         if(!tail)
 581                 return mtp;
 582
 583         if(!mtp)
 584                 return tail;
 585
 586         if(tail->type == exp_text && mtp->type == exp_text)
 587         {
 588                 tail->subst.text = pp_xrealloc(tail->subst.text, strlen(tail->subst.text)+strlen(mtp->subst.text)+1);
 589                 strcat(tail->subst.text, mtp->subst.text);
 590                 free(mtp->subst.text);
 591                 free(mtp);
 592                 return tail;
 593         }
 594
 595         if(tail->type == exp_concat && mtp->type == exp_concat)
 596         {
 597                 free(mtp);
 598                 return tail;
 599         }
 600
 601         if(tail->type == exp_concat && mtp->type == exp_text)
 602         {
 603                 int len = strlen(mtp->subst.text);
 604                 while(len)
 605                 {
 606 /* FIXME: should delete space from head of string */
 607                         if(isspace(mtp->subst.text[len-1] & 0xff))
 608                                 mtp->subst.text[--len] = '\0';
 609                         else
 610                                 break;
 611                 }
 612
 613                 if(!len)
 614                 {
 615                         free(mtp->subst.text);
 616                         free(mtp);
 617                         return tail;
 618                 }
 619         }
 620
 621         if(tail->type == exp_text && mtp->type == exp_concat)
 622         {
 623                 int len = strlen(tail->subst.text);
 624                 while(len)
 625                 {
 626                         if(isspace(tail->subst.text[len-1] & 0xff))
 627                                 tail->subst.text[--len] = '\0';
 628                         else
 629                                 break;
 630                 }
 631
 632                 if(!len)
 633                 {
 634                         mtp->prev = tail->prev;
 635                         mtp->next = tail->next;
 636                         if(tail->prev)
 637                                 tail->prev->next = mtp;
 638                         free(tail->subst.text);
 639                         free(tail);
 640                         return mtp;
 641                 }
 642         }
 643
 644         tail->next = mtp;
 645         mtp->prev = tail;
 646
 647         return mtp;
 648 }
 649
 650 static char *merge_text(char *s1, char *s2)
 651 {
 652         int l1 = strlen(s1);
 653         int l2 = strlen(s2);
 654         s1 = pp_xrealloc(s1, l1+l2+1);
 655         memcpy(s1+l1, s2, l2+1);
 656         free(s2);
 657         return s1;
 658 }