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36 * \brief Helper functions for the selection tokenizer.
38 * This file implements the functions in the headers scanner.h and
41 * \author Teemu Murtola <teemu.murtola@gmail.com>
42 * \ingroup module_selection
45 * \internal \file scanner_flex.h
46 * \brief Generated (from scanner.l) header file by Flex.
48 * This file contains definitions of functions that are needed in
49 * scanner_internal.cpp.
51 * \ingroup module_selection
56 #include "scanner_internal.h"
63 #include "gromacs/utility/cstringutil.h"
64 #include "gromacs/utility/exceptions.h"
65 #include "gromacs/utility/gmxassert.h"
66 #include "gromacs/utility/messagestringcollector.h"
67 #include "gromacs/utility/smalloc.h"
68 #include "gromacs/utility/stringutil.h"
71 #include "parsetree.h"
73 #include "selectioncollection-impl.h"
75 #include "selmethod.h"
79 * Step in which the allocated memory for pretty-printed input is incremented.
81 #define STRSTORE_ALLOCSTEP 1000
83 /* These are defined as macros in the generated scanner_flex.h.
84 * We undefine them here to have them as variable names in the subroutines.
85 * There are other ways of doing this, but this is probably the easiest. */
91 * Handles initialization of method parameter token.
94 init_param_token(YYSTYPE *yylval, gmx_ana_selparam_t *param, bool bBoolNo)
98 GMX_RELEASE_ASSERT(param->name != NULL,
99 "bBoolNo should only be set for a parameters with a name");
100 snew(yylval->str, strlen(param->name) + 3);
101 yylval->str[0] = 'n';
102 yylval->str[1] = 'o';
103 strcpy(yylval->str+2, param->name);
107 yylval->str = param->name ? gmx_strdup(param->name) : NULL;
113 * Processes a selection method token.
116 init_method_token(YYSTYPE *yylval, gmx_ana_selmethod_t *method, bool bPosMod,
117 gmx_sel_lexer_t *state)
119 /* If the previous token was not KEYWORD_POS, return EMPTY_POSMOD
120 * before the actual method to work around a limitation in Bison. */
121 if (!bPosMod && method->type != POS_VALUE)
123 state->nextmethod = method;
126 yylval->meth = method;
127 if (!(method->flags & SMETH_MODIFIER) && method->nparams == 0)
130 switch (method->type)
134 state->bMatchOf = true;
135 return KEYWORD_NUMERIC;
136 case STR_VALUE: return KEYWORD_STR;
137 case GROUP_VALUE: return KEYWORD_GROUP;
139 GMX_THROW(gmx::InternalError("Unsupported keyword type"));
144 /* Method with parameters or a modifier */
145 if (method->flags & SMETH_MODIFIER)
147 /* Remove all methods from the stack */
149 if (method->param[1].name == NULL)
151 state->nextparam = &method->param[1];
156 if (method->param[0].name == NULL)
158 state->nextparam = &method->param[0];
162 if (state->msp >= state->mstack_alloc)
164 state->mstack_alloc += 10;
165 srenew(state->mstack, state->mstack_alloc);
167 state->mstack[state->msp] = method;
168 if (method->flags & SMETH_MODIFIER)
172 switch (method->type)
174 case INT_VALUE: return METHOD_NUMERIC;
175 case REAL_VALUE: return METHOD_NUMERIC;
176 case POS_VALUE: return METHOD_POS;
177 case GROUP_VALUE: return METHOD_GROUP;
180 GMX_THROW(gmx::InternalError("Unsupported method type"));
183 return INVALID; /* Should not be reached */
187 _gmx_sel_lexer_process_pending(YYSTYPE *yylval, gmx_sel_lexer_t *state)
189 if (state->nextparam)
191 gmx_ana_selparam_t *param = state->nextparam;
192 bool bBoolNo = state->bBoolNo;
197 return END_OF_METHOD;
199 state->nextparam = NULL;
200 state->bBoolNo = false;
201 _gmx_sel_lexer_add_token(param->name, -1, state);
202 return init_param_token(yylval, param, bBoolNo);
204 if (state->prev_pos_kw > 0)
206 --state->prev_pos_kw;
208 if (state->nextmethod)
210 gmx_ana_selmethod_t *method = state->nextmethod;
212 state->nextmethod = NULL;
213 return init_method_token(yylval, method, true, state);
219 _gmx_sel_lexer_process_identifier(YYSTYPE *yylval, char *yytext, size_t yyleng,
220 gmx_sel_lexer_t *state)
222 /* Check if the identifier matches with a parameter name */
225 gmx_ana_selparam_t *param = NULL;
226 bool bBoolNo = false;
228 while (!param && sp >= 0)
231 for (i = 0; i < state->mstack[sp]->nparams; ++i)
233 /* Skip NULL parameters and too long parameters */
234 if (state->mstack[sp]->param[i].name == NULL
235 || strlen(state->mstack[sp]->param[i].name) > yyleng)
239 if (!strncmp(state->mstack[sp]->param[i].name, yytext, yyleng))
241 param = &state->mstack[sp]->param[i];
244 /* Check separately for a 'no' prefix on boolean parameters */
245 if (state->mstack[sp]->param[i].val.type == NO_VALUE
246 && yyleng > 2 && yytext[0] == 'n' && yytext[1] == 'o'
247 && !strncmp(state->mstack[sp]->param[i].name, yytext+2, yyleng-2))
249 param = &state->mstack[sp]->param[i];
261 if (param->val.type == NO_VALUE && !bBoolNo)
263 state->bMatchBool = true;
267 state->neom = state->msp - sp - 1;
268 state->nextparam = param;
269 state->bBoolNo = bBoolNo;
270 return END_OF_METHOD;
272 _gmx_sel_lexer_add_token(param->name, -1, state);
273 return init_param_token(yylval, param, bBoolNo);
277 /* Check if the identifier matches with a symbol */
278 const gmx::SelectionParserSymbol *symbol
279 = state->sc->symtab->findSymbol(std::string(yytext, yyleng), false);
280 /* If there is no match, return the token as a string */
283 yylval->str = gmx_strndup(yytext, yyleng);
284 _gmx_sel_lexer_add_token(yytext, yyleng, state);
287 _gmx_sel_lexer_add_token(symbol->name().c_str(), -1, state);
288 gmx::SelectionParserSymbol::SymbolType symtype = symbol->type();
289 /* Reserved symbols should have been caught earlier */
290 if (symtype == gmx::SelectionParserSymbol::ReservedSymbol)
292 GMX_THROW(gmx::InternalError(gmx::formatString(
293 "Mismatch between tokenizer and reserved symbol table (for '%s')",
294 symbol->name().c_str())));
296 /* For variable symbols, return the type of the variable value */
297 if (symtype == gmx::SelectionParserSymbol::VariableSymbol)
299 gmx::SelectionTreeElementPointer var = symbol->variableValue();
300 /* Return simple tokens for constant variables */
301 if (var->type == SEL_CONST)
306 yylval->i = var->v.u.i[0];
309 yylval->r = var->v.u.r[0];
314 GMX_THROW(gmx::InternalError("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_THROW(gmx::InternalError("Unsupported variable type"));
329 /* This position should not be reached. */
331 /* For method symbols, return the correct type */
332 if (symtype == gmx::SelectionParserSymbol::MethodSymbol)
334 gmx_ana_selmethod_t *method = symbol->methodValue();
335 return init_method_token(yylval, method, state->prev_pos_kw > 0, state);
337 /* For position symbols, we need to return KEYWORD_POS, but we also need
338 * some additional handling. */
339 if (symtype == gmx::SelectionParserSymbol::PositionSymbol)
341 state->bMatchOf = true;
342 yylval->str = gmx_strdup(symbol->name().c_str());
343 state->prev_pos_kw = 2;
346 /* Should not be reached */
351 _gmx_sel_lexer_add_token(const char *str, int len, gmx_sel_lexer_t *state)
353 /* Do nothing if the string is empty, or if it is a space and there is
354 * no other text yet, or if there already is a space. */
355 if (!str || len == 0 || strlen(str) == 0
356 || (str[0] == ' ' && str[1] == 0
357 && (state->pslen == 0 || state->pselstr[state->pslen - 1] == ' ')))
365 /* Allocate more memory if necessary */
366 if (state->nalloc_psel - state->pslen < len)
368 int incr = STRSTORE_ALLOCSTEP < len ? len : STRSTORE_ALLOCSTEP;
369 state->nalloc_psel += incr;
370 srenew(state->pselstr, state->nalloc_psel);
372 /* Append the token to the stored string */
373 strncpy(state->pselstr + state->pslen, str, len);
375 state->pselstr[state->pslen] = 0;
379 _gmx_sel_init_lexer(yyscan_t *scannerp, struct gmx_ana_selcollection_t *sc,
380 bool bInteractive, int maxnr, bool bGroups,
381 struct gmx_ana_indexgrps_t *grps)
383 int rc = _gmx_sel_yylex_init(scannerp);
386 // TODO: Throw a more representative exception.
387 GMX_THROW(gmx::InternalError("Lexer initialization failed"));
390 gmx_sel_lexer_t *state = new gmx_sel_lexer_t;
393 state->errors = NULL;
394 state->bGroups = bGroups;
396 state->nexpsel = (maxnr > 0 ? static_cast<int>(sc->sel.size()) + maxnr : -1);
398 state->bInteractive = bInteractive;
400 snew(state->pselstr, STRSTORE_ALLOCSTEP);
401 state->pselstr[0] = 0;
403 state->nalloc_psel = STRSTORE_ALLOCSTEP;
405 snew(state->mstack, 20);
406 state->mstack_alloc = 20;
409 state->nextparam = NULL;
410 state->nextmethod = NULL;
411 state->prev_pos_kw = 0;
412 state->bBoolNo = false;
413 state->bMatchOf = false;
414 state->bMatchBool = false;
415 state->bCmdStart = true;
416 state->bBuffer = false;
418 _gmx_sel_yyset_extra(state, *scannerp);
422 _gmx_sel_free_lexer(yyscan_t scanner)
424 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
426 sfree(state->pselstr);
427 sfree(state->mstack);
430 _gmx_sel_yy_delete_buffer(state->buffer, scanner);
433 _gmx_sel_yylex_destroy(scanner);
437 _gmx_sel_set_lexer_error_reporter(yyscan_t scanner,
438 gmx::MessageStringCollector *errors)
440 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
441 state->errors = errors;
445 _gmx_sel_lexer_set_exception(yyscan_t scanner,
446 const boost::exception_ptr &ex)
448 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
449 state->exception = ex;
453 _gmx_sel_lexer_rethrow_exception_if_occurred(yyscan_t scanner)
455 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
456 if (state->exception)
458 boost::exception_ptr ex = state->exception;
459 state->exception = boost::exception_ptr();
460 rethrow_exception(ex);
465 _gmx_sel_is_lexer_interactive(yyscan_t scanner)
467 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
468 return state->bInteractive;
471 struct gmx_ana_selcollection_t *
472 _gmx_sel_lexer_selcollection(yyscan_t scanner)
474 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
478 gmx::MessageStringCollector *
479 _gmx_sel_lexer_error_reporter(yyscan_t scanner)
481 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
482 GMX_RELEASE_ASSERT(state->errors != NULL, "Error reporter not set");
483 return state->errors;
487 _gmx_sel_lexer_has_groups_set(yyscan_t scanner)
489 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
490 return state->bGroups;
493 struct gmx_ana_indexgrps_t *
494 _gmx_sel_lexer_indexgrps(yyscan_t scanner)
496 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
501 _gmx_sel_lexer_exp_selcount(yyscan_t scanner)
503 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
504 return state->nexpsel;
508 _gmx_sel_lexer_pselstr(yyscan_t scanner)
510 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
511 return state->pselstr;
515 _gmx_sel_lexer_clear_pselstr(yyscan_t scanner)
517 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
518 state->pselstr[0] = 0;
523 _gmx_sel_lexer_clear_method_stack(yyscan_t scanner)
525 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
531 _gmx_sel_finish_method(yyscan_t scanner)
533 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
542 _gmx_sel_set_lex_input_file(yyscan_t scanner, FILE *fp)
544 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
546 state->bBuffer = true;
547 state->buffer = _gmx_sel_yy_create_buffer(fp, YY_BUF_SIZE, scanner);
548 _gmx_sel_yy_switch_to_buffer(state->buffer, scanner);
552 _gmx_sel_set_lex_input_str(yyscan_t scanner, const char *str)
554 gmx_sel_lexer_t *state = _gmx_sel_yyget_extra(scanner);
558 _gmx_sel_yy_delete_buffer(state->buffer, scanner);
560 state->bBuffer = true;
561 state->buffer = _gmx_sel_yy_scan_string(str, scanner);