2012-07-19 01:37:58 +02:00
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/* *INDENT-OFF* */ /* ATTRIBUTE_PRINTF confuses indent, avoid running it
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for now. */
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/* I/O, string, cleanup, and other random utilities for GDB.
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2014-01-01 04:54:24 +01:00
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Copyright (C) 1986-2014 Free Software Foundation, Inc.
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2012-07-19 01:37:58 +02:00
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef UTILS_H
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#define UTILS_H
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#include "cleanups.h"
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2013-05-15 14:49:05 +02:00
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#include "exceptions.h"
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share "cell" code
The "cell"-based printing code, like phex, was duplicated in both gdb
and gdbserver. This patch merges the two implementations into a new
file in common/.
2014-02-12 Tom Tromey <tromey@redhat.com>
* utils.h: Include print-utils.h.
(host_address_to_string, plongest, pulongest, phex, phex_nz)
(int_string, core_addr_to_string, core_addr_to_string_nz)
(hex_string, hex_string_custom): Don't declare.
* utils.c (NUMCELLS, CELLSIZE, get_cell, decimal2str, pulongest)
(plongest, thirty_two, phex, phex_nz, octal2str, hex_string)
(hex_string_custom, int_string, core_addr_to_string)
(core_addr_to_string_nz, host_address_to_string): Move to
common/print-utils.c.
* common/print-utils.h: New file.
* common/print-utils.c: New file
* Makefile.in (SFILES): Add common/print-utils.c.
(HFILES_NO_SRCDIR): Add common/print-utils.h.
(COMMON_OBS): Add print-utils.o.
(print-utils.o): New target.
2014-02-12 Tom Tromey <tromey@redhat.com>
* utils.h (pulongest, plongest, phex_nz): Don't declare.
Include print-utils.h.
* utils.c (NUMCELLS, CELLSIZE, get_cell, decimal2str, pulongest)
(plongest, thirty_two, phex_nz): Remove.
* Makefile.in (SFILES): Add common/print-utils.c.
(OBS): Add print-utils.o.
(print-utils-ipa.o): New target.
(print-utils.o): New target.
(IPA_OBJS): Add print-utils-ipa.o.
2014-01-17 05:41:58 +01:00
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#include "print-utils.h"
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2012-07-19 01:37:58 +02:00
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extern void initialize_utils (void);
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/* String utilities. */
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extern int sevenbit_strings;
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extern char *savestring (const char *, size_t);
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extern int strcmp_iw (const char *, const char *);
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extern int strcmp_iw_ordered (const char *, const char *);
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extern int streq (const char *, const char *);
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extern int subset_compare (char *, char *);
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ULONGEST strtoulst (const char *num, const char **trailer, int base);
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int compare_positive_ints (const void *ap, const void *bp);
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int compare_strings (const void *ap, const void *bp);
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/* This is defined in *-hdep.c, e.g., posix-hdep.c. */
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extern char *safe_strerror (int);
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/* A wrapper for bfd_errmsg to produce a more helpful error message
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in the case of bfd_error_file_ambiguously recognized.
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MATCHING, if non-NULL, is the corresponding argument to
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bfd_check_format_matches, and will be freed. */
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extern const char *gdb_bfd_errmsg (bfd_error_type error_tag, char **matching);
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New commands "mt set per-command {space,time,symtab} {on,off}".
* NEWS: Add entry.
* event-top.c: #include "maint.h".
* main.c: #include "maint.h".
* maint.c: #include <sys/time.h>, <time.h>, block.h, top.h,
timeval-utils.h, maint.h, cli/cli-setshow.h.
(per_command_time, per_command_space): New static globals.
(per_command_symtab): New static global.
(per_command_setlist, per_command_showlist): New static globals.
(struct cmd_stats): Move here from utils.c.
(set_per_command_time): Renamed from set_display_time in utils.c
and moved here. All callers updated.
(set_per_command_space): Renamed from set_display_space in utils.c
and moved here. All callers updated.
(count_symtabs_and_blocks): New function.
(report_command_stats): Moved here from utils.c. Add support for
printing symtab stats. Only print data if enabled before command
executed.
(make_command_stats_cleanup): Ditto.
(sert_per_command_cmd, show_per_command_cmd): New functions.
(_initialize_maint_cmds): Add new commands
mt set per-command {space,time,symtab} {on,off}.
* maint.h: New file.
* top.c: #include "maint.h".
* utils.c (reset_prompt_for_continue_wait_time): New function.
(get_prompt_for_continue_wait_time): New function.
* utils.h (reset_prompt_for_continue_wait_time): Declare
(get_prompt_for_continue_wait_time): Declare.
(make_command_stats_cleanup): Moved to maint.h.
(set_display_time, set_display_space): Moved to maint.h and renamed
to set_per_command_time, set_per_command_space.
* cli/cli-setshow.c (parse_cli_boolean_value): Renamed from
parse_binary_operation and made non-static. Don't call error,
just return an error marker. All callers updated.
* cli/cli-setshow.h (parse_cli_boolean_value): Declare.
doc/
* gdb.texinfo (Maintenance Commands): Add docs for
"mt set per-command {space,time,symtab} {on,off}".
testsuite/
* gdb.base/maint.exp: Update tests for per-command stats.
2013-03-21 18:37:30 +01:00
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/* Reset the prompt_for_continue clock. */
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void reset_prompt_for_continue_wait_time (void);
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/* Return the time spent in prompt_for_continue. */
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struct timeval get_prompt_for_continue_wait_time (void);
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2012-07-19 01:37:58 +02:00
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/* Parsing utilites. */
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extern int parse_pid_to_attach (char *args);
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2013-10-02 02:46:07 +02:00
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extern int parse_escape (struct gdbarch *, const char **);
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2012-07-19 01:37:58 +02:00
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char **gdb_buildargv (const char *);
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/* Cleanup utilities. */
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extern struct cleanup *make_cleanup_freeargv (char **);
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struct dyn_string;
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extern struct cleanup *make_cleanup_dyn_string_delete (struct dyn_string *);
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struct ui_file;
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extern struct cleanup *make_cleanup_ui_file_delete (struct ui_file *);
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struct ui_out;
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extern struct cleanup *
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make_cleanup_ui_out_redirect_pop (struct ui_out *uiout);
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struct section_addr_info;
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extern struct cleanup *(make_cleanup_free_section_addr_info
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(struct section_addr_info *));
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extern struct cleanup *make_cleanup_close (int fd);
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extern struct cleanup *make_cleanup_fclose (FILE *file);
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extern struct cleanup *make_cleanup_bfd_unref (bfd *abfd);
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struct obstack;
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extern struct cleanup *make_cleanup_obstack_free (struct obstack *obstack);
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extern struct cleanup *make_cleanup_restore_integer (int *variable);
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extern struct cleanup *make_cleanup_restore_uinteger (unsigned int *variable);
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struct target_ops;
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extern struct cleanup *make_cleanup_unpush_target (struct target_ops *ops);
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extern struct cleanup *
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make_cleanup_restore_ui_file (struct ui_file **variable);
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extern struct cleanup *make_cleanup_value_free_to_mark (struct value *);
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extern struct cleanup *make_cleanup_value_free (struct value *);
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struct so_list;
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extern struct cleanup *make_cleanup_free_so (struct so_list *so);
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2013-01-13 19:57:01 +01:00
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extern struct cleanup *make_cleanup_restore_current_language (void);
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2012-07-19 01:37:58 +02:00
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extern struct cleanup *make_cleanup_htab_delete (htab_t htab);
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Remove `expout*' globals from parser-defs.h
This commit removes the "expout*" globals from our parser code, turning
them into a structure that is passed when an expression needs to be
evaluated. This is the initial step to make our parser less
"globalized".
This is mostly a mechanical patch, which creates a structure containing
the "expout*" globals and then modify all the functions that handle them
in order to take the structure as argument. It is big, and has been
reviewed at least 4 times, so I think everything is covered.
Below you can see the message links from the discussions:
- First attempt:
<https://sourceware.org/ml/gdb-patches/2012-01/msg00522.html>
Message-ID: <m3k44s7qej.fsf@gmail.com>
- Second attempt:
<https://sourceware.org/ml/gdb-patches/2012-06/msg00054.html>
Message-Id: <1338665528-5932-1-git-send-email-sergiodj@redhat.com>
- Third attempt:
<https://sourceware.org/ml/gdb-patches/2014-01/msg00949.html>
Message-Id: <1390629467-27139-1-git-send-email-sergiodj@redhat.com>
- Fourth (last) attempt:
<https://sourceware.org/ml/gdb-patches/2014-03/msg00546.html>
Message-Id: <1395463432-29750-1-git-send-email-sergiodj@redhat.com>
gdb/
2014-03-27 Sergio Durigan Junior <sergiodj@redhat.com>
Remove some globals from our parser.
* language.c (unk_lang_parser): Add "struct parser_state"
argument.
* language.h (struct language_defn) <la_parser>: Likewise.
* parse.c (expout, expout_size, expout_ptr): Remove variables.
(initialize_expout): Add "struct parser_state" argument.
Rewrite function to use the parser state.
(reallocate_expout, write_exp_elt, write_exp_elt_opcode,
write_exp_elt_sym, write_exp_elt_block, write_exp_elt_objfile,
write_exp_elt_longcst, write_exp_elt_dblcst,
write_exp_elt_decfloatcst, write_exp_elt_type,
write_exp_elt_intern, write_exp_string, write_exp_string_vector,
write_exp_bitstring, write_exp_msymbol, mark_struct_expression,
write_dollar_variable): Likewise.
(parse_exp_in_context_1): Use parser state.
(insert_type_address_space): Add "struct parser_state" argument.
Use parser state.
(increase_expout_size): New function.
* parser-defs.h: Forward declare "struct language_defn" and
"struct parser_state".
(expout, expout_size, expout_ptr): Remove extern declarations.
(parse_gdbarch, parse_language): Rewrite macro declarations to
accept the parser state.
(struct parser_state): New struct.
(initialize_expout, reallocate_expout, write_exp_elt_opcode,
write_exp_elt_sym, write_exp_elt_longcst, write_exp_elt_dblcst,
write_exp_elt_decfloatcst, write_exp_elt_type,
write_exp_elt_intern, write_exp_string, write_exp_string_vector,
write_exp_bitstring, write_exp_elt_block, write_exp_elt_objfile,
write_exp_msymbol, write_dollar_variable,
mark_struct_expression, insert_type_address_space): Add "struct
parser_state" argument.
(increase_expout_size): New function.
* utils.c (do_clear_parser_state): New function.
(make_cleanup_clear_parser_state): Likewise.
* utils.h (make_cleanup_clear_parser_state): New function
prototype.
* aarch64-linux-tdep.c (aarch64_stap_parse_special_token):
Update calls to write_exp* in order to pass the parser state.
* arm-linux-tdep.c (arm_stap_parse_special_token): Likewise.
* i386-tdep.c (i386_stap_parse_special_token_triplet): Likewise.
(i386_stap_parse_special_token_three_arg_disp): Likewise.
* ppc-linux-tdep.c (ppc_stap_parse_special_token): Likewise.
* stap-probe.c (stap_parse_register_operand): Likewise.
(stap_parse_single_operand): Likewise.
(stap_parse_argument_1): Likewise.
(stap_parse_argument): Use parser state.
* stap-probe.h: Include "parser-defs.h".
(struct stap_parse_info) <pstate>: New field.
* c-exp.y (parse_type): Rewrite to use parser state.
(yyparse): Redefine to c_parse_internal.
(pstate): New global variable.
(parse_number): Add "struct parser_state" argument.
(write_destructor_name): Likewise.
(type_exp): Update calls to write_exp* and similars in order to
use parser state.
(exp1, exp, variable, qualified_name, space_identifier,
typename, typebase): Likewise.
(write_destructor_name, parse_number, lex_one_token,
classify_name, classify_inner_name, c_parse): Add "struct
parser_state" argument. Update function to use parser state.
* c-lang.h: Forward declare "struct parser_state".
(c_parse): Add "struct parser_state" argument.
* ada-exp.y (parse_type): Rewrite macro to use parser state.
(yyparse): Redefine macro to ada_parse_internal.
(pstate): New variable.
(write_int, write_object_renaming, write_var_or_type,
write_name_assoc, write_exp_op_with_string, write_ambiguous_var,
type_int, type_long, type_long_long, type_float, type_double,
type_long_double, type_char, type_boolean, type_system_address):
Add "struct parser_state" argument.
(exp1, primary, simple_exp, relation, and_exp, and_then_exp,
or_exp, or_else_exp, xor_exp, type_prefix, opt_type_prefix,
var_or_type, aggregate, aggregate_component_list,
positional_list, others, component_group,
component_associations): Update calls to write_exp* and similar
functions in order to use parser state.
(ada_parse, write_var_from_sym, write_int,
write_exp_op_with_string, write_object_renaming,
find_primitive_type, write_selectors, write_ambiguous_var,
write_var_or_type, write_name_assoc, type_int, type_long,
type_long_long, type_float, type_double, type_long_double,
type_char, type_boolean, type_system_address): Add "struct
parser_state" argument. Adjust function to use parser state.
* ada-lang.c (parse): Likewise.
* ada-lang.h: Forward declare "struct parser_state".
(ada_parse): Add "struct parser_state" argument.
* ada-lex.l (processInt, processReal): Likewise. Adjust all
calls to both functions.
* f-exp.y (parse_type, parse_f_type): Rewrite macros to use
parser state.
(yyparse): Redefine macro to f_parse_internal.
(pstate): New variable.
(parse_number): Add "struct parser_state" argument.
(type_exp, exp, subrange, typebase): Update calls to write_exp*
and similars in order to use parser state.
(parse_number): Adjust code to use parser state.
(yylex): Likewise.
(f_parse): New function.
* f-lang.h: Forward declare "struct parser_state".
(f_parse): Add "struct parser_state" argument.
* jv-exp.y (parse_type, parse_java_type): Rewrite macros to use
parser state.
(yyparse): Redefine macro for java_parse_internal.
(pstate): New variable.
(push_expression_name, push_expression_name, insert_exp): Add
"struct parser_state" argument.
(type_exp, StringLiteral, Literal, PrimitiveType, IntegralType,
FloatingPointType, exp1, PrimaryNoNewArray, FieldAccess,
FuncStart, MethodInvocation, ArrayAccess, PostfixExpression,
PostIncrementExpression, PostDecrementExpression,
UnaryExpression, PreIncrementExpression, PreDecrementExpression,
UnaryExpressionNotPlusMinus, CastExpression,
MultiplicativeExpression, AdditiveExpression, ShiftExpression,
RelationalExpression, EqualityExpression, AndExpression,
ExclusiveOrExpression, InclusiveOrExpression,
ConditionalAndExpression, ConditionalOrExpression,
ConditionalExpression, Assignment, LeftHandSide): Update
calls to write_exp* and similars in order to use parser state.
(parse_number): Ajust code to use parser state.
(yylex): Likewise.
(java_parse): New function.
(push_variable): Add "struct parser_state" argument. Adjust
code to user parser state.
(push_fieldnames, push_qualified_expression_name,
push_expression_name, insert_exp): Likewise.
* jv-lang.h: Forward declare "struct parser_state".
(java_parse): Add "struct parser_state" argument.
* m2-exp.y (parse_type, parse_m2_type): Rewrite macros to use
parser state.
(yyparse): Redefine macro to m2_parse_internal.
(pstate): New variable.
(type_exp, exp, fblock, variable, type): Update calls to
write_exp* and similars to use parser state.
(yylex): Likewise.
(m2_parse): New function.
* m2-lang.h: Forward declare "struct parser_state".
(m2_parse): Add "struct parser_state" argument.
* objc-lang.c (end_msglist): Add "struct parser_state" argument.
* objc-lang.h: Forward declare "struct parser_state".
(end_msglist): Add "struct parser_state" argument.
* p-exp.y (parse_type): Rewrite macro to use parser state.
(yyparse): Redefine macro to pascal_parse_internal.
(pstate): New variable.
(parse_number): Add "struct parser_state" argument.
(type_exp, exp1, exp, qualified_name, variable): Update calls to
write_exp* and similars in order to use parser state.
(parse_number, yylex): Adjust code to use parser state.
(pascal_parse): New function.
* p-lang.h: Forward declare "struct parser_state".
(pascal_parse): Add "struct parser_state" argument.
* go-exp.y (parse_type): Rewrite macro to use parser state.
(yyparse): Redefine macro to go_parse_internal.
(pstate): New variable.
(parse_number): Add "struct parser_state" argument.
(type_exp, exp1, exp, variable, type): Update calls to
write_exp* and similars in order to use parser state.
(parse_number, lex_one_token, classify_name, yylex): Adjust code
to use parser state.
(go_parse): Likewise.
* go-lang.h: Forward declare "struct parser_state".
(go_parse): Add "struct parser_state" argument.
2014-03-27 23:10:40 +01:00
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struct parser_state;
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extern struct cleanup *make_cleanup_clear_parser_state
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(struct parser_state **p);
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2012-07-19 01:37:58 +02:00
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extern void free_current_contents (void *);
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extern void init_page_info (void);
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extern struct cleanup *make_cleanup_restore_page_info (void);
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extern struct cleanup *
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set_batch_flag_and_make_cleanup_restore_page_info (void);
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extern struct cleanup *make_bpstat_clear_actions_cleanup (void);
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/* Path utilities. */
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extern char *gdb_realpath (const char *);
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2013-10-13 18:11:08 +02:00
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extern char *gdb_realpath_keepfile (const char *);
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2013-12-02 22:24:32 +01:00
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extern char *gdb_abspath (const char *);
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2012-07-19 01:37:58 +02:00
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extern int gdb_filename_fnmatch (const char *pattern, const char *string,
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int flags);
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extern void substitute_path_component (char **stringp, const char *from,
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const char *to);
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char *ldirname (const char *filename);
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/* GDB output, ui_file utilities. */
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struct ui_file;
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extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
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extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
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extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
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extern void begin_line (void);
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extern void wrap_here (char *);
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extern void reinitialize_more_filter (void);
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2013-06-28 19:19:39 +02:00
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extern int pagination_enabled;
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2012-07-19 01:37:58 +02:00
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/* Global ui_file streams. These are all defined in main.c. */
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/* Normal results */
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extern struct ui_file *gdb_stdout;
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/* Input stream */
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extern struct ui_file *gdb_stdin;
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/* Serious error notifications */
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extern struct ui_file *gdb_stderr;
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/* Log/debug/trace messages that should bypass normal stdout/stderr
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filtering. For moment, always call this stream using
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*_unfiltered. In the very near future that restriction shall be
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removed - either call shall be unfiltered. (cagney 1999-06-13). */
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extern struct ui_file *gdb_stdlog;
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/* Target output that should bypass normal stdout/stderr filtering.
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For moment, always call this stream using *_unfiltered. In the
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very near future that restriction shall be removed - either call
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shall be unfiltered. (cagney 1999-07-02). */
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extern struct ui_file *gdb_stdtarg;
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extern struct ui_file *gdb_stdtargerr;
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extern struct ui_file *gdb_stdtargin;
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/* More generic printf like operations. Filtered versions may return
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non-locally on error. */
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extern void fputs_filtered (const char *, struct ui_file *);
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extern void fputs_unfiltered (const char *, struct ui_file *);
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extern int fputc_filtered (int c, struct ui_file *);
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extern int fputc_unfiltered (int c, struct ui_file *);
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extern int putchar_filtered (int c);
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extern int putchar_unfiltered (int c);
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extern void puts_filtered (const char *);
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extern void puts_unfiltered (const char *);
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extern void puts_filtered_tabular (char *string, int width, int right);
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extern void puts_debug (char *prefix, char *string, char *suffix);
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extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
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extern void vfprintf_filtered (struct ui_file *, const char *, va_list)
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ATTRIBUTE_PRINTF (2, 0);
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extern void fprintf_filtered (struct ui_file *, const char *, ...)
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ATTRIBUTE_PRINTF (2, 3);
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extern void fprintfi_filtered (int, struct ui_file *, const char *, ...)
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ATTRIBUTE_PRINTF (3, 4);
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extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
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extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
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extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
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extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list)
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ATTRIBUTE_PRINTF (2, 0);
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extern void fprintf_unfiltered (struct ui_file *, const char *, ...)
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ATTRIBUTE_PRINTF (2, 3);
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extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
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extern void print_spaces (int, struct ui_file *);
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extern void print_spaces_filtered (int, struct ui_file *);
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extern char *n_spaces (int);
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extern void fputstr_filtered (const char *str, int quotr,
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struct ui_file * stream);
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extern void fputstr_unfiltered (const char *str, int quotr,
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struct ui_file * stream);
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extern void fputstrn_filtered (const char *str, int n, int quotr,
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struct ui_file * stream);
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extern void fputstrn_unfiltered (const char *str, int n, int quotr,
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struct ui_file * stream);
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/* Display the host ADDR on STREAM formatted as ``0x%x''. */
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extern void gdb_print_host_address (const void *addr, struct ui_file *stream);
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/* Convert CORE_ADDR to string in platform-specific manner.
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This is usually formatted similar to 0x%lx. */
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extern const char *paddress (struct gdbarch *gdbarch, CORE_ADDR addr);
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/* Return a string representation in hexadecimal notation of ADDRESS,
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which is suitable for printing. */
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extern const char *print_core_address (struct gdbarch *gdbarch,
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CORE_ADDR address);
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/* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
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extern hashval_t core_addr_hash (const void *ap);
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extern int core_addr_eq (const void *ap, const void *bp);
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extern CORE_ADDR string_to_core_addr (const char *my_string);
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extern void fprintf_symbol_filtered (struct ui_file *, const char *,
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enum language, int);
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2013-03-22 21:39:29 +01:00
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extern void throw_perror_with_name (enum errors errcode, const char *string)
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ATTRIBUTE_NORETURN;
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2012-07-19 01:37:58 +02:00
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extern void perror_with_name (const char *) ATTRIBUTE_NORETURN;
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2013-10-11 10:23:11 +02:00
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extern void perror_warning_with_name (const char *string);
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2012-07-19 01:37:58 +02:00
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extern void print_sys_errmsg (const char *, int);
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/* Warnings and error messages. */
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extern void (*deprecated_error_begin_hook) (void);
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/* Message to be printed before the warning message, when a warning occurs. */
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extern char *warning_pre_print;
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extern void verror (const char *fmt, va_list ap)
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ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 0);
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extern void error (const char *fmt, ...)
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ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 2);
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extern void error_stream (struct ui_file *) ATTRIBUTE_NORETURN;
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extern void vfatal (const char *fmt, va_list ap)
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ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 0);
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extern void fatal (const char *fmt, ...)
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ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 2);
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extern void internal_verror (const char *file, int line, const char *,
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va_list ap)
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ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (3, 0);
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extern void internal_vwarning (const char *file, int line,
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const char *, va_list ap)
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ATTRIBUTE_PRINTF (3, 0);
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extern void internal_warning (const char *file, int line,
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const char *, ...) ATTRIBUTE_PRINTF (3, 4);
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extern void warning (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
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extern void vwarning (const char *, va_list args) ATTRIBUTE_PRINTF (1, 0);
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/* Misc. utilities. */
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/* Allocation and deallocation functions for the libiberty hash table
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which use obstacks. */
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void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
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void dummy_obstack_deallocate (void *object, void *data);
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#ifdef HAVE_WAITPID
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extern pid_t wait_to_die_with_timeout (pid_t pid, int *status, int timeout);
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#endif
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extern int producer_is_gcc_ge_4 (const char *producer);
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extern int myread (int, char *, int);
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/* Ensure that V is aligned to an N byte boundary (B's assumed to be a
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power of 2). Round up/down when necessary. Examples of correct
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use include:
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addr = align_up (addr, 8); -- VALUE needs 8 byte alignment
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write_memory (addr, value, len);
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addr += len;
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and:
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sp = align_down (sp - len, 16); -- Keep SP 16 byte aligned
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write_memory (sp, value, len);
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Note that uses such as:
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write_memory (addr, value, len);
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addr += align_up (len, 8);
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and:
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sp -= align_up (len, 8);
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write_memory (sp, value, len);
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are typically not correct as they don't ensure that the address (SP
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or ADDR) is correctly aligned (relying on previous alignment to
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keep things right). This is also why the methods are called
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"align_..." instead of "round_..." as the latter reads better with
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this incorrect coding style. */
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extern ULONGEST align_up (ULONGEST v, int n);
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extern ULONGEST align_down (ULONGEST v, int n);
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2013-06-18 20:11:19 +02:00
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/* Sign extend VALUE. BIT is the (1-based) index of the bit in VALUE
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to sign-extend. */
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extern LONGEST gdb_sign_extend (LONGEST value, int bit);
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2012-07-19 01:37:58 +02:00
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#endif /* UTILS_H */
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