On 64-bit hosts (where size_t is 64 bits and int is 32 bits), the old glibc regex code mishandles strings longer than 2**31 bytes. This patch fixes this when the regex code is used in gnulib (i.e., outside glibc). * lib/regex.h (_REGEX_LARGE_OFFSETS): New feature-test macro, governing whether the rest of this patch is active. By default, the macro is disabled and the patch has no effect. (regoff_t) [defined _REGEX_LARGE_OFFSETS]: Define to off_t, not int. (__re_idx_t, __re_size_t, __re_long_size_t): New types. (struct re_pattern_buffer, re_search, re_search_2, re_match): (re_match_2, re_set_registers): Use the new types. * lib/regex_internal.h (Idx, re_hashval_t): New types. (REG_MISSING, REG_ERROR, REG_VALID_INDEX, REG_VALID_NONZERO_INDEX): New macros. (re_node_set, re_charset_t, re_token_t, re_string_realloc_buffers): (re_string_context_at, bin_tree_t, re_dfastate_t): (struct re_state_table_entry, state_array_t, re_sub_match_last_t): (re_sub_match_top_t, re_match_context_t, re_sift_context_t): (struct re_fail_stack_ent_t, struct re_fail_stack_t, struct re_dfa_t): (re_string_char_size_at, re_string_wchar_at): (re_string_elem_size_at): Use the new types and macros to port to 64-bit hosts. Use unsigned types for internal values, so that the code mostly works even for arrays larger than SSIZE_MAX. * lib/regcomp.c (re_compile_internal, init_dfa, duplicate_node): (search_duplicated_node, calc_eclosure_iter, fetch_number): (parse_reg_exp, parse_branch, parse_expression, parse_sub_exp): (build_equiv_class, build_charclass, re_compile_fastmap_iter): (free_dfa_content, create_initial_state, optimize_utf8, analyze): (optimize_subexps, calc_first, link_nfa_nodes, duplicate_node_closure): (calc_inveclosure, parse_dup_op, build_range_exp): (build_collating_symbol, parse_bracket_exp, build_charclass_op): (fetch_number, create_token_tree, mark_opt_subexp): Likewise. * lib/regex_internal.c (re_string_construct_common, create_ci_newstate): (create_cd_newstate, re_string_allocate, re_string_construct): (re_string_realloc_buffers, build_wcs_upper_buffer): (re_string_skip_chars, build_upper_buffer, re_string_translate_buffer): (re_string_reconstruct, re_string_peek_byte_case): (re_string_fetch_byte_case, re_string_context_at): (re_node_set_alloc, re_node_set_init_1, re_node_set_init_2): (re_node_set_init_copy, re_node_set_add_intersect): (re_node_set_init_union, re_node_set_merge, re_node_set_insert): (re_node_set_insert_last, re_node_set_compare, re_node_set_contains): (re_node_set_remove_at, re_dfa_add_node, calc_state_hash): (re_acquire_state, re_acquire_state_context, register_state): Likewise. * lib/regex.c (match_ctx_init, match_ctx_add_entry, search_cur_bkref_entry): (match_ctx_add_subtop, match_ctx_add_sublast, sift_ctx_init): (re_search_internal, re_search_2_stub, re_search_stub) (re_copy_regs, check_matching, check_halt_state_context, update_regs): (push_fail_stack, sift_states_iter_mb, build_sifted_states): (update_cur_sifted_state, check_dst_limits): (check_dst_limits_calc_pos_1, check_dst_limits_calc_pos): (check_subexp_limits, sift_states_bkref, merge_state_array): (check_subexp_matching_top, get_subexp, get_subexp_sub): (find_subexp_node, check_arrival, check_arrival_add_next_nodes): (check_arrival_expand_ecl, check_arrival_expand_ecl_sub): (expand_bkref_cache, check_node_accept_bytes): (group_nodes_into_DFAstates, check_node_accept, regexec, re_match): (re_search, re_match_2, re_search_2, prune_impossible_nodes): (acquire_init_state_context, check_halt_node_context): (proceed_next_node, pop_fail_stack, set_regs, free_fail_stack_return): (sift_states_backward, clean_state_log_if_needed): (sub_epsilon_src_nodes, add_epsilone_src_nodes, merge_state_with_log): (find_recover_state, transit_state_sb, transit_state_mb): (transit_state_bkref, build_trtable, match_ctx_clean): Likewise. * lib/regcomp.c (parse_dup_op): Add an extra test if Idx is unsigned, to work around an assumption that REG_MISSING is negative. * m4/regex.m4 (gl_REGEX): Require AC_SYS_LARGEFILE, Define _REGEX_LARGE_OFFSETS). Test for regoff_t/off_t bug in 64-bit and large-file glibc and in 32-bit large-file Solaris. * config/srclist.txt: Add glibc bug 1281.

#serial 4

# Copyright (C) 2002, 2005 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_BISON],
[
  # getdate.y works with bison only.
  : ${YACC='bison -y'}
dnl
dnl Declaring YACC & YFLAGS precious will not be necessary after GNULIB
dnl requires an Autoconf greater than 2.59c, but it will probably still be
dnl useful to override the description of YACC in the --help output, re
dnl getdate.y assuming `bison -y'.
  AC_ARG_VAR(YACC,
[The `Yet Another C Compiler' implementation to use.  Defaults to `bison -y'.
Values other than `bison -y' will most likely break on most systems.])dnl
  AC_ARG_VAR(YFLAGS,
[YFLAGS contains the list arguments that will be passed by default to Bison.
This script will default YFLAGS to the empty string to avoid a default value of
`-d' given by some make applications.])dnl
])