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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [data-streamer-out.c] - Blame information for rev 720

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Line No. Rev Author Line
1 684 jeremybenn
/* 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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   Copyright 2011 Free Software Foundation, Inc.
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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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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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Software Foundation; either version 3, or (at your option) any later
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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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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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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 GCC; see the file COPYING3.  If not see
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<http://www.gnu.org/licenses/>.  */
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#include "config.h"
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#include "system.h"
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#include "coretypes.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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   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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   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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unsigned
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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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{
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  struct string_slot **slot;
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  struct string_slot s_slot;
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  s_slot.s = s;
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  s_slot.len = len;
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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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                                                 &s_slot, INSERT);
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  if (*slot == NULL)
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    {
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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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      struct string_slot *new_slot = XOBNEW (&ob->obstack, struct string_slot);
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      const char *string;
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      if (!persistent)
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        {
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          char *tmp;
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          string = tmp = XOBNEWVEC (&ob->obstack, char, len);
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          memcpy (tmp, s, len);
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        }
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      else
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        string = s;
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      new_slot->s = string;
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      new_slot->len = len;
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      new_slot->slot_num = start;
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      *slot = new_slot;
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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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      return start + 1;
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    }
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  else
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    {
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      struct string_slot *old_slot = *slot;
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      return old_slot->slot_num + 1;
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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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   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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   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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void
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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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                                   const char *s, unsigned int len,
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                                   bool persistent)
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{
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  if (s)
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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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  else
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    streamer_write_char_stream (index_stream, 0);
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}
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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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   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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void
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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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                       const char *string, bool persistent)
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{
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  if (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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                                       persistent);
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  else
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    streamer_write_char_stream (index_stream, 0);
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}
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/* Write a zero to the output stream.  */
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void
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streamer_write_zero (struct output_block *ob)
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{
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  streamer_write_char_stream (ob->main_stream, 0);
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}
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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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streamer_write_uhwi (struct output_block *ob, unsigned HOST_WIDE_INT work)
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{
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  streamer_write_uhwi_stream (ob->main_stream, work);
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}
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/* Write a HOST_WIDE_INT value WORK to OB->main_stream.  */
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void
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streamer_write_hwi (struct output_block *ob, HOST_WIDE_INT work)
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{
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  streamer_write_hwi_stream (ob->main_stream, work);
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}
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/* Write an unsigned HOST_WIDE_INT value WORK to OBS.  */
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void
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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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{
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  do
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    {
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      unsigned int byte = (work & 0x7f);
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      work >>= 7;
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      if (work != 0)
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        /* More bytes to follow.  */
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        byte |= 0x80;
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      streamer_write_char_stream (obs, byte);
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    }
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  while (work != 0);
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}
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/* Write a HOST_WIDE_INT value WORK to OBS.  */
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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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{
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  int more, byte;
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  do
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    {
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      byte = (work & 0x7f);
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      /* arithmetic shift */
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      work >>= 7;
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      more = !((work == 0 && (byte & 0x40) == 0)
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               || (work == -1 && (byte & 0x40) != 0));
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      if (more)
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        byte |= 0x80;
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      streamer_write_char_stream (obs, byte);
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    }
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  while (more);
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}

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