| 1 |
|
| 2 |
/* define some search patterns */ |
| 3 |
|
| 4 |
digit [0-9] |
| 5 |
letter [A-Za-z] |
| 6 |
natural {digit}+ |
| 7 |
signedNat ("+"|"-")?{natural} |
| 8 |
number {signedNat}("."{natural})?([Ee]{signedNat})? |
| 9 |
identifier ("_"|{letter})({letter}|{digit}|"-"|"_")* |
| 10 |
|
| 11 |
/* define start states */ |
| 12 |
|
| 13 |
%x PRE_P |
| 14 |
%x INCL |
| 15 |
%x DEF |
| 16 |
%x IFDEF |
| 17 |
%x IFNDEF |
| 18 |
%x ESCAPE |
| 19 |
%x CHECK_ESCAPE |
| 20 |
|
| 21 |
/* what to put at the top of the lex code */ |
| 22 |
|
| 23 |
%{ |
| 24 |
#include <stdio.h> |
| 25 |
#include <string.h> |
| 26 |
#include "BASS_parse.h" |
| 27 |
#ifdef IS_MPI |
| 28 |
#define __is_lex__ |
| 29 |
#include "../headers/mpiInterface.h" |
| 30 |
#endif |
| 31 |
|
| 32 |
typedef unsigned short int r_short; |
| 33 |
|
| 34 |
extern void change_in_file( FILE* in_file ); |
| 35 |
|
| 36 |
// the following is used by the include start state |
| 37 |
|
| 38 |
#define MAX_BUFFER_DEPTH 10 |
| 39 |
YY_BUFFER_STATE buffer_stack[MAX_BUFFER_DEPTH]; // a stack of the include buffers |
| 40 |
int buffer_stack_ptr = 0; |
| 41 |
struct filename_list{ |
| 42 |
char my_name[300]; |
| 43 |
struct filename_list* next; |
| 44 |
}; |
| 45 |
struct filename_list* yyfile_name; |
| 46 |
struct filename_list* temp_yyfile_name; |
| 47 |
int yylineno_stack[MAX_BUFFER_DEPTH]; |
| 48 |
|
| 49 |
|
| 50 |
// the following is a check against the define buffer length |
| 51 |
|
| 52 |
void check_def_buff( char* defined, int index ); |
| 53 |
|
| 54 |
//these are used by the ifdef and ifndef statements |
| 55 |
|
| 56 |
int escape_stack_ptr = 0; //keeps track of the escape stack |
| 57 |
|
| 58 |
|
| 59 |
%} |
| 60 |
|
| 61 |
%option yylineno |
| 62 |
|
| 63 |
%% |
| 64 |
|
| 65 |
{signedNat} { |
| 66 |
yylval.i_val = atoi( yytext ); |
| 67 |
return INTEGER; |
| 68 |
} |
| 69 |
|
| 70 |
{number} { |
| 71 |
yylval.d_val = atof( yytext ); |
| 72 |
return DOUBLE; |
| 73 |
} |
| 74 |
|
| 75 |
{identifier} { |
| 76 |
int token; |
| 77 |
token = res_word( yytext ); |
| 78 |
|
| 79 |
if( token == DEFINED ){ |
| 80 |
|
| 81 |
if( buffer_stack_ptr >= MAX_BUFFER_DEPTH ){ |
| 82 |
fprintf( stderr, |
| 83 |
"Maximum buffer depth exceeded for %s.\n", |
| 84 |
yytext ); |
| 85 |
exit(1); |
| 86 |
} |
| 87 |
|
| 88 |
buffer_stack[buffer_stack_ptr] = YY_CURRENT_BUFFER; |
| 89 |
buffer_stack_ptr++; |
| 90 |
|
| 91 |
yy_scan_string( get_definition( yytext ) ); |
| 92 |
} |
| 93 |
else if( token ){ |
| 94 |
return token; |
| 95 |
} |
| 96 |
else{ |
| 97 |
yylval.s_ptr = strdup( yytext ); |
| 98 |
return IDENTIFIER; |
| 99 |
} |
| 100 |
} |
| 101 |
|
| 102 |
\".*\" { |
| 103 |
/* little routine to strip off the quotes */ |
| 104 |
|
| 105 |
u_short i; |
| 106 |
i = 0; // index |
| 107 |
while( yytext[i+1] != '\"' ){ |
| 108 |
|
| 109 |
yytext[i] = yytext[i+1]; |
| 110 |
i++; |
| 111 |
} |
| 112 |
yytext[i] = '\0'; |
| 113 |
yylval.s_ptr = strdup( yytext ); |
| 114 |
return QUOTED_STRING; |
| 115 |
} |
| 116 |
|
| 117 |
\[{natural}\] { |
| 118 |
int index; |
| 119 |
sscanf(yytext, "[%d]", &index); |
| 120 |
yylval.i_val = index; |
| 121 |
return ARRAY_INDEX; |
| 122 |
} |
| 123 |
|
| 124 |
[ \t\n]+ /* ignore whitespace */; |
| 125 |
|
| 126 |
"/*" { |
| 127 |
/* ignore comments */ |
| 128 |
u_short done; |
| 129 |
char c; |
| 130 |
|
| 131 |
done = 0; |
| 132 |
while( !done ){ |
| 133 |
|
| 134 |
c = input(); |
| 135 |
while( c != '*' ){ |
| 136 |
|
| 137 |
c = input(); |
| 138 |
} |
| 139 |
while( c == '*' ){ |
| 140 |
|
| 141 |
c = input(); |
| 142 |
} |
| 143 |
if( c == '/' ) done = 1; |
| 144 |
} |
| 145 |
} |
| 146 |
|
| 147 |
"//".*\n /* ignore comments */; |
| 148 |
|
| 149 |
"#" BEGIN(PRE_P); |
| 150 |
|
| 151 |
. { |
| 152 |
// pass everything else to yacc |
| 153 |
return yytext[0]; |
| 154 |
} |
| 155 |
|
| 156 |
<PRE_P>"include" BEGIN(INCL); |
| 157 |
<PRE_P>"define" BEGIN(DEF); |
| 158 |
<PRE_P>"ifdef" BEGIN(IFDEF); |
| 159 |
<PRE_P>"ifndef" BEGIN(IFNDEF); |
| 160 |
<PRE_P>"endif" /* do nothing */; |
| 161 |
<PRE_P>\n BEGIN(INITIAL); |
| 162 |
|
| 163 |
<INCL>[ \t]* /* eat white space */ |
| 164 |
<INCL>\".*\" { |
| 165 |
char foo_name[300]; |
| 166 |
|
| 167 |
// little routine to strip off the quotes |
| 168 |
|
| 169 |
u_short i; |
| 170 |
i = 0; // index |
| 171 |
while( yytext[i+1] != '\"' ){ |
| 172 |
|
| 173 |
yytext[i] = yytext[i+1]; |
| 174 |
i++; |
| 175 |
} |
| 176 |
|
| 177 |
yytext[i] = '\0'; |
| 178 |
strcpy( foo_name, yytext ); |
| 179 |
|
| 180 |
// now we have the include file name |
| 181 |
|
| 182 |
if( buffer_stack_ptr >= MAX_BUFFER_DEPTH ){ |
| 183 |
|
| 184 |
fprintf( stderr, "Includes nested too deeply\n" ); |
| 185 |
exit(1); |
| 186 |
} |
| 187 |
|
| 188 |
buffer_stack[buffer_stack_ptr] = YY_CURRENT_BUFFER; |
| 189 |
yylineno_stack[buffer_stack_ptr] = yylineno; |
| 190 |
buffer_stack_ptr++; |
| 191 |
|
| 192 |
yyin = fopen( yytext, "r" ); |
| 193 |
if( yyin == NULL ){ |
| 194 |
fprintf( stderr, "Unable to include file %s\n", yytext ); |
| 195 |
exit(1); |
| 196 |
} |
| 197 |
|
| 198 |
yy_switch_to_buffer( yy_create_buffer( yyin, YY_BUF_SIZE ) ); |
| 199 |
yylineno = 0; |
| 200 |
|
| 201 |
temp_yyfile_name = (struct filename_list* )malloc( sizeof( struct filename_list ) ); |
| 202 |
temp_yyfile_name->next = yyfile_name; |
| 203 |
yyfile_name = temp_yyfile_name; |
| 204 |
strcpy( yyfile_name->my_name, foo_name ); |
| 205 |
|
| 206 |
|
| 207 |
BEGIN(INITIAL); |
| 208 |
} |
| 209 |
<INCL>\n BEGIN(INITIAL); |
| 210 |
<INCL>. /* ignore everything else */ |
| 211 |
|
| 212 |
<DEF>[ \t]* /* eat white space */; |
| 213 |
<DEF>{identifier} { |
| 214 |
char c; |
| 215 |
char definition[ DEFINED_BUFFER_SIZE ]; |
| 216 |
short int done; |
| 217 |
short int c_done; // a done marker for the comments |
| 218 |
int def_ptr; |
| 219 |
|
| 220 |
// initialize the definition buffer |
| 221 |
|
| 222 |
for( def_ptr = 0; def_ptr < DEFINED_BUFFER_SIZE; def_ptr++ ){ |
| 223 |
definition[def_ptr] = '\0'; |
| 224 |
} |
| 225 |
|
| 226 |
def_ptr =0; |
| 227 |
done = 0; |
| 228 |
c_done = 0; |
| 229 |
|
| 230 |
while( !done ){ |
| 231 |
|
| 232 |
c = input(); |
| 233 |
if( c == '\"' ){ |
| 234 |
|
| 235 |
// shove the whole quoted string into the macro |
| 236 |
|
| 237 |
definition[def_ptr] = c; |
| 238 |
fprintf( stderr, "%c", c ); |
| 239 |
def_ptr++; |
| 240 |
check_def_buff( yytext, def_ptr ); |
| 241 |
|
| 242 |
c = input(); |
| 243 |
while( c != '\"' ){ |
| 244 |
|
| 245 |
definition[def_ptr] = c; |
| 246 |
fprintf( stderr, "%c", c ); |
| 247 |
def_ptr++; |
| 248 |
check_def_buff( yytext, def_ptr ); |
| 249 |
|
| 250 |
c = input(); |
| 251 |
} |
| 252 |
definition[def_ptr] = c; |
| 253 |
fprintf( stderr, "%c", c ); |
| 254 |
def_ptr++; |
| 255 |
check_def_buff( yytext, def_ptr ); |
| 256 |
c = input(); |
| 257 |
} |
| 258 |
|
| 259 |
// handle comments |
| 260 |
|
| 261 |
if( c == '/' ){ |
| 262 |
c = input(); |
| 263 |
switch( c ){ |
| 264 |
|
| 265 |
case '/': |
| 266 |
while( c != '\n' && c != '\\' ){ |
| 267 |
c = input(); |
| 268 |
} |
| 269 |
break; |
| 270 |
|
| 271 |
case '*': |
| 272 |
c_done = 0; |
| 273 |
while( !c_done ){ |
| 274 |
c = input(); |
| 275 |
while( c != '*' ){ |
| 276 |
c = input(); |
| 277 |
} |
| 278 |
while( c == '*' ){ |
| 279 |
c = input(); |
| 280 |
} |
| 281 |
if( c == '/' ) c_done = 1; |
| 282 |
} |
| 283 |
c = input(); |
| 284 |
break; |
| 285 |
|
| 286 |
default: |
| 287 |
// the '/' char was a normal symbol |
| 288 |
definition[def_ptr] = '/'; |
| 289 |
fprintf( stderr, "%c", c ); |
| 290 |
def_ptr++; |
| 291 |
check_def_buff( yytext, def_ptr ); |
| 292 |
break; |
| 293 |
} |
| 294 |
} |
| 295 |
|
| 296 |
|
| 297 |
if( c == '\n' ){ |
| 298 |
done = 1; |
| 299 |
} |
| 300 |
|
| 301 |
else{ |
| 302 |
|
| 303 |
// check for the line wrap character '\' |
| 304 |
|
| 305 |
if( c == '\\' ){ |
| 306 |
|
| 307 |
// skip the rest of the line until the line return |
| 308 |
|
| 309 |
c = input(); |
| 310 |
while( c != '\n' ){ |
| 311 |
c = input(); |
| 312 |
} |
| 313 |
} |
| 314 |
|
| 315 |
else{ |
| 316 |
|
| 317 |
// we now know the character is a good one |
| 318 |
|
| 319 |
definition[def_ptr] = c; |
| 320 |
fprintf( stderr, "%c", c ); |
| 321 |
def_ptr++; |
| 322 |
check_def_buff( yytext, def_ptr ); |
| 323 |
} |
| 324 |
} |
| 325 |
} |
| 326 |
|
| 327 |
insert_define( yytext, definition ); |
| 328 |
BEGIN(INITIAL); |
| 329 |
} |
| 330 |
<DEF>\n BEGIN(INITIAL); |
| 331 |
<DEF>. /* ignore everything else */; |
| 332 |
|
| 333 |
<IFDEF>[ \t]* /* eat white space */; |
| 334 |
<IFDEF>{identifier} { |
| 335 |
if( !is_defined( yytext ) ){ |
| 336 |
escape_stack_ptr++; |
| 337 |
BEGIN(ESCAPE); |
| 338 |
} |
| 339 |
} |
| 340 |
<IFDEF>\n BEGIN(INITIAL); |
| 341 |
<IFDEF>. /* ignore everything else */; |
| 342 |
|
| 343 |
<IFNDEF>[ \t]* /* eat the white space */; |
| 344 |
<IFNDEF>{identifier} { |
| 345 |
if( is_defined( yytext ) ){ |
| 346 |
escape_stack_ptr++; |
| 347 |
BEGIN(ESCAPE); |
| 348 |
} |
| 349 |
} |
| 350 |
<IFNDEF>\n BEGIN(INITIAL); |
| 351 |
<IFNDEF>. /* ignore everything else */; |
| 352 |
|
| 353 |
<ESCAPE>\".*\" /* do nothing */; |
| 354 |
<ESCAPE>"//".*\n /* ignore comments */; |
| 355 |
<ESCAPE>"/*" { |
| 356 |
/* ignore comments */ |
| 357 |
u_short done; |
| 358 |
char c; |
| 359 |
|
| 360 |
done = 0; |
| 361 |
while( !done ){ |
| 362 |
|
| 363 |
c = input(); |
| 364 |
while( c != '*' ){ |
| 365 |
|
| 366 |
c = input(); |
| 367 |
} |
| 368 |
|
| 369 |
while( c == '*' ){ |
| 370 |
|
| 371 |
c = input(); |
| 372 |
} |
| 373 |
|
| 374 |
if( c == '/' ) done = 1; |
| 375 |
} |
| 376 |
} |
| 377 |
<ESCAPE>"#" BEGIN(CHECK_ESCAPE); |
| 378 |
<ESCAPE>. /* ignore everything else */; |
| 379 |
|
| 380 |
<CHECK_ESCAPE>[ \t] /* ignore whitespace */; |
| 381 |
<CHECK_ESCAPE>"ifdef" { escape_stack_ptr++; BEGIN(ESCAPE); } |
| 382 |
<CHECK_ESCAPE>"ifndef" { escape_stack_ptr++; BEGIN(ESCAPE); } |
| 383 |
<CHECK_ESCAPE>"endif" { |
| 384 |
escape_stack_ptr--; |
| 385 |
if( escape_stack_ptr <= 0){ |
| 386 |
escape_stack_ptr = 0; // just in case something flubbed |
| 387 |
BEGIN(INITIAL); |
| 388 |
} |
| 389 |
} |
| 390 |
<CHECK_ESCAPE>\n BEGIN(ESCAPE); |
| 391 |
<CHECK_ESCAPE>. /* ignore everything else */; |
| 392 |
|
| 393 |
<<EOF>> { |
| 394 |
buffer_stack_ptr--; |
| 395 |
if( buffer_stack_ptr < 0 ){ |
| 396 |
|
| 397 |
yyterminate(); |
| 398 |
} |
| 399 |
|
| 400 |
else{ |
| 401 |
|
| 402 |
yy_delete_buffer( YY_CURRENT_BUFFER ); |
| 403 |
yy_switch_to_buffer( buffer_stack[buffer_stack_ptr] ); |
| 404 |
yylineno = yylineno_stack[buffer_stack_ptr]; |
| 405 |
|
| 406 |
temp_yyfile_name = yyfile_name; |
| 407 |
yyfile_name = temp_yyfile_name->next; |
| 408 |
free( temp_yyfile_name ); |
| 409 |
} |
| 410 |
} |
| 411 |
|
| 412 |
%% |
| 413 |
|
| 414 |
void check_def_buff( char* defined, int index ){ |
| 415 |
|
| 416 |
if( index >= DEFINED_BUFFER_SIZE ){ |
| 417 |
|
| 418 |
fprintf( stderr, "Define buffer size exceeded for %s\n", defined ); |
| 419 |
#ifdef IS_MPI |
| 420 |
mpiInterfaceExit(); |
| 421 |
#endif |
| 422 |
exit(1); |
| 423 |
} |
| 424 |
} |
| 425 |
|
| 426 |
int yywrap(void){ |
| 427 |
return 1; |
| 428 |
} |
| 429 |
|
| 430 |
void change_in_file( FILE* in_file ){ |
| 431 |
|
| 432 |
yyin = in_file; |
| 433 |
} |
