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author | Jing Yu <jingyu@google.com> | 2011-01-30 22:09:54 -0800 |
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committer | Jing Yu <jingyu@google.com> | 2011-01-30 22:09:54 -0800 |
commit | a9a8b9e7e4aee6a3846ba62703283d10849bc0a6 (patch) | |
tree | bfd550c5e600ab0c227d3615fb5183127604870d /binutils-2.20.1/gas/sb.c | |
parent | 8a5a8339de3149b7f99caf08e9cb72467d60cd01 (diff) | |
download | toolchain_binutils-a9a8b9e7e4aee6a3846ba62703283d10849bc0a6.zip toolchain_binutils-a9a8b9e7e4aee6a3846ba62703283d10849bc0a6.tar.gz toolchain_binutils-a9a8b9e7e4aee6a3846ba62703283d10849bc0a6.tar.bz2 |
Upgrade binutils and gold.
upgrade binutils-2.19 to binutils-2.20.1
upgrade gold to a relatively new version binutils-20100303
Before, both binutils and gold were built from binutils-2.19.
Now binutils will be built from binutils-2.20.1 and gold will
be built from binutils-20100303.
Change-Id: Ibd0130756723337d2b4783d5b1d5e5b02a1adc83
Diffstat (limited to 'binutils-2.20.1/gas/sb.c')
-rw-r--r-- | binutils-2.20.1/gas/sb.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/binutils-2.20.1/gas/sb.c b/binutils-2.20.1/gas/sb.c new file mode 100644 index 0000000..8d5e8dd --- /dev/null +++ b/binutils-2.20.1/gas/sb.c @@ -0,0 +1,246 @@ +/* sb.c - string buffer manipulation routines + Copyright 1994, 1995, 2000, 2003, 2005, 2006, 2007, 2009 + Free Software Foundation, Inc. + + Written by Steve and Judy Chamberlain of Cygnus Support, + sac@cygnus.com + + This file is part of GAS, the GNU Assembler. + + GAS 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. + + GAS 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 GAS; see the file COPYING. If not, write to the Free + Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ + +#include "as.h" +#include "sb.h" + +/* These routines are about manipulating strings. + + They are managed in things called `sb's which is an abbreviation + for string buffers. An sb has to be created, things can be glued + on to it, and at the end of it's life it should be freed. The + contents should never be pointed at whilst it is still growing, + since it could be moved at any time + + eg: + sb_new (&foo); + sb_grow... (&foo,...); + use foo->ptr[*]; + sb_kill (&foo); */ + +static int dsize = 5; +static void sb_check (sb *, int); + +/* Statistics of sb structures. */ +static int string_count[sb_max_power_two]; + +/* Free list of sb structures. */ +static struct +{ + sb_element *size[sb_max_power_two]; +} free_list; + +/* Initializes an sb. */ + +static void +sb_build (sb *ptr, int size) +{ + /* See if we can find one to allocate. */ + sb_element *e; + + gas_assert (size < sb_max_power_two); + + e = free_list.size[size]; + if (!e) + { + /* Nothing there, allocate one and stick into the free list. */ + e = (sb_element *) xmalloc (sizeof (sb_element) + (1 << size)); + e->next = free_list.size[size]; + e->size = 1 << size; + free_list.size[size] = e; + string_count[size]++; + } + + /* Remove from free list. */ + free_list.size[size] = e->next; + + /* Copy into callers world. */ + ptr->ptr = e->data; + ptr->pot = size; + ptr->len = 0; + ptr->item = e; +} + +void +sb_new (sb *ptr) +{ + sb_build (ptr, dsize); +} + +/* Deallocate the sb at ptr. */ + +void +sb_kill (sb *ptr) +{ + /* Return item to free list. */ + ptr->item->next = free_list.size[ptr->pot]; + free_list.size[ptr->pot] = ptr->item; +} + +/* Add the sb at s to the end of the sb at ptr. */ + +void +sb_add_sb (sb *ptr, sb *s) +{ + sb_check (ptr, s->len); + memcpy (ptr->ptr + ptr->len, s->ptr, s->len); + ptr->len += s->len; +} + +/* Helper for sb_scrub_and_add_sb. */ + +static sb *sb_to_scrub; +static char *scrub_position; +static int +scrub_from_sb (char *buf, int buflen) +{ + int copy; + copy = sb_to_scrub->len - (scrub_position - sb_to_scrub->ptr); + if (copy > buflen) + copy = buflen; + memcpy (buf, scrub_position, copy); + scrub_position += copy; + return copy; +} + +/* Run the sb at s through do_scrub_chars and add the result to the sb + at ptr. */ + +void +sb_scrub_and_add_sb (sb *ptr, sb *s) +{ + sb_to_scrub = s; + scrub_position = s->ptr; + + sb_check (ptr, s->len); + ptr->len += do_scrub_chars (scrub_from_sb, ptr->ptr + ptr->len, s->len); + + sb_to_scrub = 0; + scrub_position = 0; +} + +/* Make sure that the sb at ptr has room for another len characters, + and grow it if it doesn't. */ + +static void +sb_check (sb *ptr, int len) +{ + if (ptr->len + len >= 1 << ptr->pot) + { + sb tmp; + int pot = ptr->pot; + + while (ptr->len + len >= 1 << pot) + pot++; + sb_build (&tmp, pot); + sb_add_sb (&tmp, ptr); + sb_kill (ptr); + *ptr = tmp; + } +} + +/* Make the sb at ptr point back to the beginning. */ + +void +sb_reset (sb *ptr) +{ + ptr->len = 0; +} + +/* Add character c to the end of the sb at ptr. */ + +void +sb_add_char (sb *ptr, int c) +{ + sb_check (ptr, 1); + ptr->ptr[ptr->len++] = c; +} + +/* Add null terminated string s to the end of sb at ptr. */ + +void +sb_add_string (sb *ptr, const char *s) +{ + int len = strlen (s); + sb_check (ptr, len); + memcpy (ptr->ptr + ptr->len, s, len); + ptr->len += len; +} + +/* Add string at s of length len to sb at ptr */ + +void +sb_add_buffer (sb *ptr, const char *s, int len) +{ + sb_check (ptr, len); + memcpy (ptr->ptr + ptr->len, s, len); + ptr->len += len; +} + +/* Like sb_name, but don't include the null byte in the string. */ + +char * +sb_terminate (sb *in) +{ + sb_add_char (in, 0); + --in->len; + return in->ptr; +} + +/* Start at the index idx into the string in sb at ptr and skip + whitespace. return the index of the first non whitespace character. */ + +int +sb_skip_white (int idx, sb *ptr) +{ + while (idx < ptr->len + && (ptr->ptr[idx] == ' ' + || ptr->ptr[idx] == '\t')) + idx++; + return idx; +} + +/* Start at the index idx into the sb at ptr. skips whitespace, + a comma and any following whitespace. returns the index of the + next character. */ + +int +sb_skip_comma (int idx, sb *ptr) +{ + while (idx < ptr->len + && (ptr->ptr[idx] == ' ' + || ptr->ptr[idx] == '\t')) + idx++; + + if (idx < ptr->len + && ptr->ptr[idx] == ',') + idx++; + + while (idx < ptr->len + && (ptr->ptr[idx] == ' ' + || ptr->ptr[idx] == '\t')) + idx++; + + return idx; +} |