X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/7d27c823deae06e004cc3c55f843964e24f518a7..5449dd0f25f584ec596f165cb6004e1b4d092f10:/ChangeLog diff --git a/ChangeLog b/ChangeLog index 5c0df688..b98d47fd 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,280 @@ +2001-12-10 Akim Demaille + + * src/output.c (output, prepare): Make sure the values of the + muscles `action' and `prologue' are 0-terminated. + +2001-12-10 Akim Demaille + + Clean up GCC warnings. + + * src/reader.c (copy_action): `buf' is not used. + (parse_skel_decl): Be static. + * src/muscle_tab.c (mhash1, mhash2, muscle_insert): Preserve `const'. + * src/options.h (create_long_option_table): Have a real prototype. + * lib/hash.c, lib/hash.h (hash_insert, hash_insert_at, hash_delete) + (hash_delete_at): Return const void *. + Adjust casts to preserve the const. + +2001-12-10 Akim Demaille + + * configure.in: Require 2.52g. + M4 is not needed, but AUTOM4TE is. + * m4/m4.m4: Remove. + * tests/Makefile.am: Adjust. + + +2001-12-10 Akim Demaille + + One structure for states is enough, even though theoretically + there are LR(0) states and LALR(1) states. + + * src/lalr.h (state_t): Remove. + (state_table): Be state_t **, not state_t *. + * src/state.h (core, CORE_ALLOC): Rename as... + (state_t, STATE_ALLOC): this. + Add the LALR(1) members: shifts, reductions, errs. + * src/LR0.c (state_table): Rename as... + (state_hash): this, to avoid name clashes with the global + `state_table'. + * src/print_graph.c, src/LR0.c, src/LR0.h, src/conflicts.c + * src/lalr.c, src/lalr.h, src/output.c, src/print.c: Adjust. + + +2001-12-10 Akim Demaille + + Bison dumps core on bash.y. + Reported by Pascal Bart. + + * src/warshall.c (bitmatrix_print): New. + (TC): Use it. + When performing a transitive closure R(i, j) && R(j, k) => R(i, k), + j must be the outer loop. + * tests/regression.at (Broken Closure): New. + +2001-12-05 Akim Demaille + + * tests/atlocal.in (CPPFLAGS): Do not leave a space between -I and + its argument. + Reported by Peter Hámorský. + +2001-12-05 Akim Demaille + + * src/conflicts.c (err_table): Remove. + (resolve_sr_conflict): Adjust. + * src/lalr.h (state_t.reduction_table, state_t.shift_table): + Rename as... + (state_t.reductions, state_t.shifts): this. + +2001-12-05 Akim Demaille + + * src/reduce.c (reduce_grammar_tables): No longer disable the + removal of useless rules via CPP but via `if (0)', so that the + compiler still check the code is valid. + For instance, it should have noticed `rline' no longer exists: use + the `line' member of rule_t. + * src/gram.c (dummy, rline): Remove, unused. + +2001-12-05 Akim Demaille + + * src/output.c (pack_vector): Use assert, not berror. + * src/main.c (berror): Remove, unused. + +2001-12-05 Akim Demaille + + New experimental feature: if --verbose --trace output all the + items of a state, not only its kernel. + + * src/print.c (print_core): If `trace_flag', then invoke closure + before outputting the items of the state (print_core is no longer + a correct name them). + (print_results): Invoke new_closure/free_closure if needed. + +2001-12-05 Akim Demaille + + * src/LR0.c (new_itemsets): Use nshifts only, not shiftcount. + * src/closure.c, src/closure.h (itemsetsize): Rename as... + (nitemset): for consistency with the rest of the project. + +2001-12-05 Akim Demaille + + * src/closure.c (print_closure): Improve. + (closure): Use it for printing input and output. + +2001-12-05 Akim Demaille + + * src/closure.c (FIRSTS, FDERIVES): Adjust to reality: they are + indexed by nonterminals. + +2001-12-05 Akim Demaille + + * src/warshall.c (TC, RTC): De-obsfucate (source reduced to 22% of + what it was!). + * src/warshall.h: Remove accidental duplication of the content. + +2001-12-05 Akim Demaille + + * src/closure.c (set_fderives): De-obfuscate. + +2001-12-05 Akim Demaille + + * src/closure.c (print_firsts, print_fderives): De-obfuscate. + +2001-12-05 Akim Demaille + + * src/closure.c (set_firsts): De-obfuscate. + +2001-12-05 Akim Demaille + + * src/output.c (action_row): De-obfuscate + using the good o' techniques: arrays not pointers, variable + locality, BITISSET, RESETBIT etc. + +2001-12-05 Akim Demaille + + Pessimize the code to simplify it: from now on, all the states + have a valid SHIFTS, which NSHIFTS is possibly 0. + + * src/LR0.c (shifts_new): Be global and move to.. + * src/state.c, src/state.h: here. + * src/conflicts, src/lalr.c, src/output.c, src/print.c, + * src/print_graph: Adjust. + +2001-12-05 Akim Demaille + + * src/state.h (SHIFT_DISABLE, SHIFT_IS_DISABLED): New. + * src/conflicts.c: Use it. + Restore a few missing `if (!SHIFT_IS_DISABLED)' which were + incorrectly ``simplified''. + +2001-12-05 Akim Demaille + + * src/conflicts.c (flush_shift, resolve_sr_conflict): De-obfuscate + using the good o' techniques: arrays not pointers, variable + locality, BITISSET, RESETBIT etc. + +2001-12-05 Akim Demaille + + * src/state.h (SHIFT_SYMBOL): New. + * src/conflicts.c: Use it to deobfuscate. + +2001-12-05 Akim Demaille + + * src/conflicts.c (count_sr_conflicts, count_rr_conflicts) + (print_reductions): De-obfuscate using the good o' techniques: + arrays not pointers, variable locality, BITISSET. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Arrays, not pointers. + Use BITISSET. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Pessimize, but clarify. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Improve variable locality. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Pessimize, but clarify. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Improve variable locality. + +2001-12-05 Akim Demaille + + * src/state.h (SHIFT_IS_ERROR, SHIFT_IS_GOTO, SHIFT_IS_SHIFT): New. + * src/lalr.c: Use them. + +2001-12-05 Akim Demaille + + * src/LR0.c (augment_automaton): Formatting changes. + Better variable locality. + +2001-12-05 Akim Demaille + + * src/lalr.c (matrix_print): New. + (transpose): Use it. + Use arrays instead of pointers. + +2001-12-05 Akim Demaille + + * src/lalr.c (maxrhs): Move to... + * src/gram.c, src/gram.h (ritem_longest_rhs): here. + * src/lalr.c (build_relations): Adjust. + +2001-12-05 Akim Demaille + + * src/lalr.c (transpose): Free the memory allocated to the + argument, as it is replaced by the results by the unique caller. + (build_relations): Merely invoke transpose: it handles the memory + deallocation. + Improve variable locality. + Avoid variables used as mere abbreviations. + (compute_lookaheads): Use arrays instead of pointers. + +2001-12-05 Akim Demaille + + * src/lalr.c (initialize_F): Improve variable locality. + Avoid variables used as mere abbreviations. + +2001-12-05 Akim Demaille + + * src/derives.c (print_derives): Display the ruleno. + * src/lalr.c (initialize_F, transpose): Better variable locality + to improve readability. + Avoid variables used as mere abbreviations. + +2001-12-05 Akim Demaille + + * src/lalr.c (traverse): Use arrays instead of pointers. + +2001-12-05 Akim Demaille + + * src/nullable.c (set_nullable): Use a for loop to de-obfuscate + the handling of squeue. + `symbol >= 0' is wrong now, use `rule_table[ruleno].useful'. + +2001-12-05 Akim Demaille + + Because useless nonterminals are now kept alive (instead of being + `destroyed'), we now sometimes examine them, and store information + related to them. Hence we need to know their number, and adjust + memory allocations. + + * src/reduce.c, src/reduce.h (nuseless_nonterminals): No longer + static. + * src/LR0.c (allocate_itemsets): The memory allocated to + `symbol_count' was used for two different purpose: once to count + the number of occurrences of each symbol, and later reassigned to + `shift_symbol', containing the symbol that can be shifted from a + given state. + Deobfuscate, i.e., allocate, use and free `symbol_count' here + only, and... + (new_itemsets): Allocate `shift_symbol' here. + (allocate_itemsets): symbol_count includes useless nonterminals. + Make room for them. + (free_storage): Use `free', not `XFREE', for pointers that cannot + be null. + +2001-12-05 Akim Demaille + + * src/nullable.c (set_nullable): Deobfuscate the handling of + ritem. + `symbol >= 0' is wrong now, use `rule_table[ruleno].useful'. + +2001-12-05 Akim Demaille + + * src/gram.c, src/gram.h (ritem_print): New. + * src/gram.c (dummy): Remove, now there is actual code in gram.c. + (This useless function was defined only to work around VMS linkers + that can't handle compilation units with variables only). + * src/reduce.c (dump_grammar): Use it to trace the construction of + ritem. + 2001-12-04 Paul Eggert * src/bison.simple (union yyalloc): Change member names @@ -7,7 +284,7 @@ and may generate better code on some machines. (yystpcpy): Use prototype if __STDC__ is defined, not just if __cplusplus is defined. - + 2001-11-30 Akim Demaille * configure.in (WARNING_CFLAGS): Add -Werror when possible.