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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [data-streamer-out.c] - Rev 772
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/* 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); }
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