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authorDan Albert <danalbert@google.com>2016-02-24 13:48:45 -0800
committerDan Albert <danalbert@google.com>2016-02-24 13:51:18 -0800
commitb9de1157289455b0ca26daff519d4a0ddcd1fa13 (patch)
tree4c56cc0a34b91f17033a40a455f26652304f7b8d /gcc-4.8.3/gcc/data-streamer-in.c
parent098157a754787181cfa10e71325832448ddcea98 (diff)
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Update 4.8.1 to 4.8.3.
My previous drop was the wrong version. The platform mingw is currently using 4.8.3, not 4.8.1 (not sure how I got that wrong). From ftp://ftp.gnu.org/gnu/gcc/gcc-4.8.3/gcc-4.8.3.tar.bz2. Bug: http://b/26523949 Change-Id: Id85f1bdcbbaf78c7d0b5a69e74c798a08f341c35
Diffstat (limited to 'gcc-4.8.3/gcc/data-streamer-in.c')
-rw-r--r--gcc-4.8.3/gcc/data-streamer-in.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/data-streamer-in.c b/gcc-4.8.3/gcc/data-streamer-in.c
new file mode 100644
index 0000000..0f83aa6
--- /dev/null
+++ b/gcc-4.8.3/gcc/data-streamer-in.c
@@ -0,0 +1,160 @@
+/* Routines for restoring various data types from a file stream. This deals
+ with various data types like strings, integers, enums, etc.
+
+ Copyright (C) 2011-2013 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 "diagnostic.h"
+#include "data-streamer.h"
+
+/* Read a string from the string table in DATA_IN using input block
+ IB. Write the length to RLEN. */
+
+const char *
+string_for_index (struct data_in *data_in, unsigned int loc, unsigned int *rlen)
+{
+ struct lto_input_block str_tab;
+ unsigned int len;
+ const char *result;
+
+ if (!loc)
+ {
+ *rlen = 0;
+ return NULL;
+ }
+
+ /* Get the string stored at location LOC in DATA_IN->STRINGS. */
+ LTO_INIT_INPUT_BLOCK (str_tab, data_in->strings, loc - 1,
+ data_in->strings_len);
+ len = streamer_read_uhwi (&str_tab);
+ *rlen = len;
+
+ if (str_tab.p + len > data_in->strings_len)
+ internal_error ("bytecode stream: string too long for the string table");
+
+ result = (const char *)(data_in->strings + str_tab.p);
+
+ return result;
+}
+
+
+/* Read a string from the string table in DATA_IN using input block
+ IB. Write the length to RLEN. */
+
+const char *
+streamer_read_indexed_string (struct data_in *data_in,
+ struct lto_input_block *ib, unsigned int *rlen)
+{
+ return string_for_index (data_in, streamer_read_uhwi (ib), rlen);
+}
+
+
+/* Read a NULL terminated string from the string table in DATA_IN. */
+
+const char *
+streamer_read_string (struct data_in *data_in, struct lto_input_block *ib)
+{
+ unsigned int len;
+ const char *ptr;
+
+ ptr = streamer_read_indexed_string (data_in, ib, &len);
+ if (!ptr)
+ return NULL;
+ if (ptr[len - 1] != '\0')
+ internal_error ("bytecode stream: found non-null terminated string");
+
+ return ptr;
+}
+
+
+/* Read a string from the string table in DATA_IN using the bitpack BP.
+ Write the length to RLEN. */
+
+const char *
+bp_unpack_indexed_string (struct data_in *data_in,
+ struct bitpack_d *bp, unsigned int *rlen)
+{
+ return string_for_index (data_in, bp_unpack_var_len_unsigned (bp), rlen);
+}
+
+
+/* Read a NULL terminated string from the string table in DATA_IN. */
+
+const char *
+bp_unpack_string (struct data_in *data_in, struct bitpack_d *bp)
+{
+ unsigned int len;
+ const char *ptr;
+
+ ptr = bp_unpack_indexed_string (data_in, bp, &len);
+ if (!ptr)
+ return NULL;
+ if (ptr[len - 1] != '\0')
+ internal_error ("bytecode stream: found non-null terminated string");
+
+ return ptr;
+}
+
+
+/* Read an unsigned HOST_WIDE_INT number from IB. */
+
+unsigned HOST_WIDE_INT
+streamer_read_uhwi (struct lto_input_block *ib)
+{
+ unsigned HOST_WIDE_INT result = 0;
+ int shift = 0;
+ unsigned HOST_WIDE_INT byte;
+
+ while (true)
+ {
+ byte = streamer_read_uchar (ib);
+ result |= (byte & 0x7f) << shift;
+ shift += 7;
+ if ((byte & 0x80) == 0)
+ return result;
+ }
+}
+
+
+/* Read a HOST_WIDE_INT number from IB. */
+
+HOST_WIDE_INT
+streamer_read_hwi (struct lto_input_block *ib)
+{
+ HOST_WIDE_INT result = 0;
+ int shift = 0;
+ unsigned HOST_WIDE_INT byte;
+
+ while (true)
+ {
+ byte = streamer_read_uchar (ib);
+ result |= (byte & 0x7f) << shift;
+ shift += 7;
+ if ((byte & 0x80) == 0)
+ {
+ if ((shift < HOST_BITS_PER_WIDE_INT) && (byte & 0x40))
+ result |= - ((HOST_WIDE_INT)1 << shift);
+
+ return result;
+ }
+ }
+}