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32 * \brief Helper functions for the selection tokenizer.
34 * This file implements the functions in the headers scanner.h and
37 * \author Teemu Murtola <teemu.murtola@cbr.su.se>
38 * \ingroup module_selection
41 * \internal \file scanner_flex.h
42 * \brief Generated (from scanner.l) header file by Flex.
44 * This file contains definitions of functions that are needed in
45 * scanner_internal.cpp.
47 * \ingroup module_selection
59 #include "gromacs/legacyheaders/typedefs.h"
60 #include "gromacs/legacyheaders/smalloc.h"
61 #include "gromacs/legacyheaders/string2.h"
63 #include "gromacs/utility/errorcodes.h"
64 #include "gromacs/utility/exceptions.h"
65 #include "gromacs/utility/gmxassert.h"
66 #include "gromacs/utility/messagestringcollector.h"
68 #include "parsetree.h"
69 #include "selectioncollection-impl.h"
71 #include "selmethod.h"
76 #include "scanner_internal.h"
78 //! Step in which the allocated memory for pretty-printed input is incremented.
79 #define STRSTORE_ALLOCSTEP 1000
81 /* These are defined as macros in the generated scanner_flex.h.
82 * We undefine them here to have them as variable names in the subroutines.
83 * There are other ways of doing this, but this is probably the easiest. */
89 * Handles initialization of method parameter token.
92 init_param_token(YYSTYPE *yylval, gmx_ana_selparam_t *param, bool bBoolNo)
96 GMX_RELEASE_ASSERT(param->name != NULL,
97 "bBoolNo should only be set for a parameters with a name");
98 snew(yylval->str, strlen(param->name) + 3);
100 yylval->str[1] = 'o';
101 strcpy(yylval->str+2, param->name);
105 yylval->str = param->name ? strdup(param->name) : NULL;
111 * Processes a selection method token.
114 init_method_token(YYSTYPE *yylval, gmx_ana_selmethod_t *method, bool bPosMod,
115 gmx_sel_lexer_t *state)
117 /* If the previous token was not KEYWORD_POS, return EMPTY_POSMOD
118 * before the actual method to work around a limitation in Bison. */
119 if (!bPosMod && method->type != POS_VALUE)
121 state->nextmethod = method;
124 yylval->meth = method;
125 if (!(method->flags & SMETH_MODIFIER) && method->nparams == 0)
128 switch (method->type)
130 case INT_VALUE: return KEYWORD_NUMERIC;
131 case REAL_VALUE: return KEYWORD_NUMERIC;
132 case STR_VALUE: return KEYWORD_STR;
133 case GROUP_VALUE: return KEYWORD_GROUP;
135 GMX_ERROR_NORET(gmx::eeInternalError, "Unsupported keyword type");
141 /* Method with parameters or a modifier */
142 if (method->flags & SMETH_MODIFIER)
144 /* Remove all methods from the stack */
146 if (method->param[1].name == NULL)
148 state->nextparam = &method->param[1];
153 if (method->param[0].name == NULL)
155 state->nextparam = &method->param[0];
159 if (state->msp >= state->mstack_alloc)
161 state->mstack_alloc += 10;
162 srenew(state->mstack, state->mstack_alloc);
164 state->mstack[state->msp] = method;
165 if (method->flags & SMETH_MODIFIER)
169 switch (method->type)
171 case INT_VALUE: return METHOD_NUMERIC;
172 case REAL_VALUE: return METHOD_NUMERIC;
173 case POS_VALUE: return METHOD_POS;
174 case GROUP_VALUE: return METHOD_GROUP;
177 GMX_ERROR_NORET(gmx::eeInternalError, "Unsupported method type");
181 return INVALID; /* Should not be reached */
185 _gmx_sel_lexer_process_pending(YYSTYPE *yylval, gmx_sel_lexer_t *state)
187 if (state->nextparam)
189 gmx_ana_selparam_t *param = state->nextparam;
190 bool bBoolNo = state->bBoolNo;
195 return END_OF_METHOD;
197 state->nextparam = NULL;
198 state->bBoolNo = false;
199 _gmx_sel_lexer_add_token(param->name, -1, state);
200 return init_param_token(yylval, param, bBoolNo);
202 if (state->prev_pos_kw > 0)
204 --state->prev_pos_kw;
206 if (state->nextmethod)
208 gmx_ana_selmethod_t *method = state->nextmethod;
210 state->nextmethod = NULL;
211 return init_method_token(yylval, method, true, state);
217 _gmx_sel_lexer_process_identifier(YYSTYPE *yylval, char *yytext, size_t yyleng,
218 gmx_sel_lexer_t *state)
220 /* Check if the identifier matches with a parameter name */
223 gmx_ana_selparam_t *param = NULL;
224 bool bBoolNo = false;
226 while (!param && sp >= 0)
229 for (i = 0; i < state->mstack[sp]->nparams; ++i)
231 /* Skip NULL parameters and too long parameters */
232 if (state->mstack[sp]->param[i].name == NULL
233 || strlen(state->mstack[sp]->param[i].name) > yyleng)
237 if (!strncmp(state->mstack[sp]->param[i].name, yytext, yyleng))
239 param = &state->mstack[sp]->param[i];
242 /* Check separately for a 'no' prefix on boolean parameters */
243 if (state->mstack[sp]->param[i].val.type == NO_VALUE
244 && yyleng > 2 && yytext[0] == 'n' && yytext[1] == 'o'
245 && !strncmp(state->mstack[sp]->param[i].name, yytext+2, yyleng-2))
247 param = &state->mstack[sp]->param[i];
259 if (param->val.type == NO_VALUE && !bBoolNo)
261 state->bMatchBool = true;
265 state->neom = state->msp - sp - 1;
266 state->nextparam = param;
267 state->bBoolNo = bBoolNo;
268 return END_OF_METHOD;
270 _gmx_sel_lexer_add_token(param->name, -1, state);
271 return init_param_token(yylval, param, bBoolNo);
275 /* Check if the identifier matches with a symbol */
276 const gmx::SelectionParserSymbol *symbol
277 = state->sc->symtab->findSymbol(std::string(yytext, yyleng), false);
278 /* If there is no match, return the token as a string */
281 yylval->str = gmx_strndup(yytext, yyleng);
282 _gmx_sel_lexer_add_token(yytext, yyleng, state);
285 _gmx_sel_lexer_add_token(symbol->name().c_str(), -1, state);
286 gmx::SelectionParserSymbol::SymbolType symtype = symbol->type();
287 /* Reserved symbols should have been caught earlier */
288 if (symtype == gmx::SelectionParserSymbol::ReservedSymbol)
290 GMX_ERROR_NORET(gmx::eeInternalError,
291 "Mismatch between tokenizer and reserved symbol table");
294 /* For variable symbols, return the type of the variable value */
295 if (symtype == gmx::SelectionParserSymbol::VariableSymbol)
297 gmx::SelectionTreeElementPointer var = symbol->variableValue();
298 /* Return simple tokens for constant variables */
299 if (var->type == SEL_CONST)
304 yylval->i = var->v.u.i[0];
307 yylval->r = var->v.u.r[0];
312 GMX_ERROR_NORET(gmx::eeInternalError,
313 "Unsupported variable type");
317 yylval->sel = new gmx::SelectionTreeElementPointer(var);
320 case INT_VALUE: return VARIABLE_NUMERIC;
321 case REAL_VALUE: return VARIABLE_NUMERIC;
322 case POS_VALUE: return VARIABLE_POS;
323 case GROUP_VALUE: return VARIABLE_GROUP;
326 GMX_ERROR_NORET(gmx::eeInternalError,
327 "Unsupported variable type");
331 return INVALID; /* Should not be reached. */
333 /* For method symbols, return the correct type */
334 if (symtype == gmx::SelectionParserSymbol::MethodSymbol)
336 gmx_ana_selmethod_t *method = symbol->methodValue();
337 return init_method_token(yylval, method, state->prev_pos_kw > 0, state);
339 /* For position symbols, we need to return KEYWORD_POS, but we also need
340 * some additional handling. */
341 if (symtype == gmx::SelectionParserSymbol::PositionSymbol)
343 state->bMatchOf = true;
344 yylval->str = strdup(symbol->name().c_str());
345 state->prev_pos_kw = 2;
348 /* Should not be reached */
353 _gmx_sel_lexer_add_token(const char *str, int len, gmx_sel_lexer_t *state)
355 /* Do nothing if the string is empty, or if it is a space and there is
356 * no other text yet, or if there already is a space. */
357 if (!str || len == 0 || strlen(str) == 0
358 || (str[0] == ' ' && str[1] == 0
359 && (state->pslen == 0 || state->pselstr[state->pslen - 1] == ' ')))
367 /* Allocate more memory if necessary */
368 if (state->nalloc_psel - state->pslen < len)
370 int incr = STRSTORE_ALLOCSTEP < len ? len : STRSTORE_ALLOCSTEP;
371 state->nalloc_psel += incr;
372 srenew(state->pselstr, state->nalloc_psel);
374 /* Append the token to the stored string */
375 strncpy(state->pselstr + state->pslen, str, len);
377 state->pselstr[state->pslen] = 0;
381 _gmx_sel_init_lexer(yyscan_t *scannerp, struct gmx_ana_selcollection_t *sc,
382 bool bInteractive, int maxnr, bool bGroups,
383 struct gmx_ana_indexgrps_t *grps)
385 int rc = _gmx_sel_yylex_init(scannerp);
388 // TODO: Throw a more representative exception.
389 GMX_THROW(gmx::InternalError("Lexer initialization failed"));
392 gmx_sel_lexer_t *state = new gmx_sel_lexer_t;
395 state->errors = NULL;
396 state->bGroups = bGroups;
398 state->nexpsel = (maxnr > 0 ? static_cast<int>(sc->sel.size()) + maxnr : -1);
400 state->bInteractive = bInteractive;
402 snew(state->pselstr, STRSTORE_ALLOCSTEP);
403 state->pselstr[0] = 0;
405 state->nalloc_psel = STRSTORE_ALLOCSTEP;
407 snew(state->mstack, 20);
408 state->mstack_alloc = 20;
411 state->nextparam = NULL;
412 state->nextmethod = NULL;
413 state->prev_pos_kw = 0;
414 state->bBoolNo = false;
415 state->bMatchOf = false;
416 state->bMatchBool = false;
417 state->bCmdStart = true;
418 state->bBuffer = false;
420 _gmx_sel_yyset_extra(state, *scannerp);
424 _gmx_sel_free_lexer(yyscan_t scanner)
426 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
428 sfree(state->pselstr);
429 sfree(state->mstack);
432 _gmx_sel_yy_delete_buffer(state->buffer, scanner);
435 _gmx_sel_yylex_destroy(scanner);
439 _gmx_sel_set_lexer_error_reporter(yyscan_t scanner,
440 gmx::MessageStringCollector *errors)
442 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
443 state->errors = errors;
447 _gmx_sel_lexer_set_exception(yyscan_t scanner,
448 const boost::exception_ptr &ex)
450 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
451 state->exception = ex;
455 _gmx_sel_lexer_rethrow_exception_if_occurred(yyscan_t scanner)
457 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
458 if (state->exception)
460 boost::exception_ptr ex = state->exception;
461 state->exception = boost::exception_ptr();
462 rethrow_exception(ex);
467 _gmx_sel_is_lexer_interactive(yyscan_t scanner)
469 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
470 return state->bInteractive;
473 struct gmx_ana_selcollection_t *
474 _gmx_sel_lexer_selcollection(yyscan_t scanner)
476 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
480 gmx::MessageStringCollector *
481 _gmx_sel_lexer_error_reporter(yyscan_t scanner)
483 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
484 GMX_RELEASE_ASSERT(state->errors != NULL, "Error reporter not set");
485 return state->errors;
489 _gmx_sel_lexer_has_groups_set(yyscan_t scanner)
491 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
492 return state->bGroups;
495 struct gmx_ana_indexgrps_t *
496 _gmx_sel_lexer_indexgrps(yyscan_t scanner)
498 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
503 _gmx_sel_lexer_exp_selcount(yyscan_t scanner)
505 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
506 return state->nexpsel;
510 _gmx_sel_lexer_pselstr(yyscan_t scanner)
512 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
513 return state->pselstr;
517 _gmx_sel_lexer_clear_pselstr(yyscan_t scanner)
519 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
520 state->pselstr[0] = 0;
525 _gmx_sel_lexer_clear_method_stack(yyscan_t scanner)
527 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
533 _gmx_sel_finish_method(yyscan_t scanner)
535 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
544 _gmx_sel_set_lex_input_file(yyscan_t scanner, FILE *fp)
546 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
548 state->bBuffer = true;
549 state->buffer = _gmx_sel_yy_create_buffer(fp, YY_BUF_SIZE, scanner);
550 _gmx_sel_yy_switch_to_buffer(state->buffer, scanner);
554 _gmx_sel_set_lex_input_str(yyscan_t scanner, const char *str)
556 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
560 _gmx_sel_yy_delete_buffer(state->buffer, scanner);
562 state->bBuffer = true;
563 state->buffer = _gmx_sel_yy_scan_string(str, scanner);