| /* Routines for saving various data types to a file stream. This deals |
| with various data types like strings, integers, enums, etc. |
| |
| Copyright 2011 Free Software Foundation, Inc. |
| Contributed by Diego Novillo <dnovillo@google.com> |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "data-streamer.h" |
| |
| /* Return index used to reference STRING of LEN characters in the string table |
| in OB. The string might or might not include a trailing '\0'. |
| Then put the index onto the INDEX_STREAM. |
| When PERSISTENT is set, the string S is supposed to not change during |
| duration of the OB and thus OB can keep pointer into it. */ |
| |
| unsigned |
| streamer_string_index (struct output_block *ob, const char *s, unsigned int len, |
| bool persistent) |
| { |
| struct string_slot **slot; |
| struct string_slot s_slot; |
| |
| s_slot.s = s; |
| s_slot.len = len; |
| s_slot.slot_num = 0; |
| |
| slot = (struct string_slot **) htab_find_slot (ob->string_hash_table, |
| &s_slot, INSERT); |
| if (*slot == NULL) |
| { |
| struct lto_output_stream *string_stream = ob->string_stream; |
| unsigned int start = string_stream->total_size; |
| struct string_slot *new_slot = XOBNEW (&ob->obstack, struct string_slot); |
| const char *string; |
| |
| if (!persistent) |
| { |
| char *tmp; |
| string = tmp = XOBNEWVEC (&ob->obstack, char, len); |
| memcpy (tmp, s, len); |
| } |
| else |
| string = s; |
| |
| new_slot->s = string; |
| new_slot->len = len; |
| new_slot->slot_num = start; |
| *slot = new_slot; |
| streamer_write_uhwi_stream (string_stream, len); |
| lto_output_data_stream (string_stream, string, len); |
| return start + 1; |
| } |
| else |
| { |
| struct string_slot *old_slot = *slot; |
| return old_slot->slot_num + 1; |
| } |
| } |
| |
| |
| /* Output STRING of LEN characters to the string table in OB. The |
| string might or might not include a trailing '\0'. Then put the |
| index onto the INDEX_STREAM. |
| When PERSISTENT is set, the string S is supposed to not change during |
| duration of the OB and thus OB can keep pointer into it. */ |
| |
| void |
| streamer_write_string_with_length (struct output_block *ob, |
| struct lto_output_stream *index_stream, |
| const char *s, unsigned int len, |
| bool persistent) |
| { |
| if (s) |
| streamer_write_uhwi_stream (index_stream, |
| streamer_string_index (ob, s, len, persistent)); |
| else |
| streamer_write_char_stream (index_stream, 0); |
| } |
| |
| |
| /* Output the '\0' terminated STRING to the string |
| table in OB. Then put the index onto the INDEX_STREAM. |
| When PERSISTENT is set, the string S is supposed to not change during |
| duration of the OB and thus OB can keep pointer into it. */ |
| |
| void |
| streamer_write_string (struct output_block *ob, |
| struct lto_output_stream *index_stream, |
| const char *string, bool persistent) |
| { |
| if (string) |
| streamer_write_string_with_length (ob, index_stream, string, |
| strlen (string) + 1, |
| persistent); |
| else |
| streamer_write_char_stream (index_stream, 0); |
| } |
| |
| |
| /* Output STRING of LEN characters to the string table in OB. Then |
| put the index into BP. |
| When PERSISTENT is set, the string S is supposed to not change during |
| duration of the OB and thus OB can keep pointer into it. */ |
| |
| void |
| bp_pack_string_with_length (struct output_block *ob, struct bitpack_d *bp, |
| const char *s, unsigned int len, bool persistent) |
| { |
| unsigned index = 0; |
| if (s) |
| index = streamer_string_index (ob, s, len, persistent); |
| bp_pack_var_len_unsigned (bp, index); |
| } |
| |
| |
| /* Output the '\0' terminated STRING to the string |
| table in OB. Then put the index onto the bitpack BP. |
| When PERSISTENT is set, the string S is supposed to not change during |
| duration of the OB and thus OB can keep pointer into it. */ |
| |
| void |
| bp_pack_string (struct output_block *ob, struct bitpack_d *bp, |
| const char *s, bool persistent) |
| { |
| unsigned index = 0; |
| if (s) |
| index = streamer_string_index (ob, s, strlen (s) + 1, persistent); |
| bp_pack_var_len_unsigned (bp, index); |
| } |
| |
| |
| |
| /* Write a zero to the output stream. */ |
| |
| void |
| streamer_write_zero (struct output_block *ob) |
| { |
| streamer_write_char_stream (ob->main_stream, 0); |
| } |
| |
| |
| /* Write an unsigned HOST_WIDE_INT value WORK to OB->main_stream. */ |
| |
| void |
| streamer_write_uhwi (struct output_block *ob, unsigned HOST_WIDE_INT work) |
| { |
| streamer_write_uhwi_stream (ob->main_stream, work); |
| } |
| |
| |
| /* Write a HOST_WIDE_INT value WORK to OB->main_stream. */ |
| |
| void |
| streamer_write_hwi (struct output_block *ob, HOST_WIDE_INT work) |
| { |
| streamer_write_hwi_stream (ob->main_stream, work); |
| } |
| |
| |
| /* Write an unsigned HOST_WIDE_INT value WORK to OBS. */ |
| |
| void |
| streamer_write_uhwi_stream (struct lto_output_stream *obs, |
| unsigned HOST_WIDE_INT work) |
| { |
| do |
| { |
| unsigned int byte = (work & 0x7f); |
| work >>= 7; |
| if (work != 0) |
| /* More bytes to follow. */ |
| byte |= 0x80; |
| |
| streamer_write_char_stream (obs, byte); |
| } |
| while (work != 0); |
| } |
| |
| |
| /* Write a HOST_WIDE_INT value WORK to OBS. */ |
| |
| void |
| streamer_write_hwi_stream (struct lto_output_stream *obs, HOST_WIDE_INT work) |
| { |
| int more, byte; |
| |
| do |
| { |
| byte = (work & 0x7f); |
| /* arithmetic shift */ |
| work >>= 7; |
| more = !((work == 0 && (byte & 0x40) == 0) |
| || (work == -1 && (byte & 0x40) != 0)); |
| if (more) |
| byte |= 0x80; |
| |
| streamer_write_char_stream (obs, byte); |
| } |
| while (more); |
| } |