diff options
author | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
---|---|---|
committer | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
commit | 82bcbebce43f0227f506d75a5b764b6847041bae (patch) | |
tree | fe9f8597b48a430c4daeb5123e3e8eb28e6f9da9 /gcc-4.7/gcc/data-streamer-out.c | |
parent | 3c052de3bb16ac53b6b6ed659ec7557eb84c7590 (diff) | |
download | toolchain_gcc-82bcbebce43f0227f506d75a5b764b6847041bae.tar.gz toolchain_gcc-82bcbebce43f0227f506d75a5b764b6847041bae.tar.bz2 toolchain_gcc-82bcbebce43f0227f506d75a5b764b6847041bae.zip |
Initial check-in of gcc 4.7.2.
Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365
Diffstat (limited to 'gcc-4.7/gcc/data-streamer-out.c')
-rw-r--r-- | gcc-4.7/gcc/data-streamer-out.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/gcc-4.7/gcc/data-streamer-out.c b/gcc-4.7/gcc/data-streamer-out.c new file mode 100644 index 000000000..98cbf2261 --- /dev/null +++ b/gcc-4.7/gcc/data-streamer-out.c @@ -0,0 +1,185 @@ +/* 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); +} + + +/* 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); +} |