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