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Diffstat (limited to 'binutils-2.24/gas/sb.c')
| -rw-r--r-- | binutils-2.24/gas/sb.c | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/binutils-2.24/gas/sb.c b/binutils-2.24/gas/sb.c deleted file mode 100644 index 7710cbc0..00000000 --- a/binutils-2.24/gas/sb.c +++ /dev/null @@ -1,237 +0,0 @@ -/* sb.c - string buffer manipulation routines - Copyright 1994, 1995, 2000, 2003, 2005, 2006, 2007, 2009, 2012 - 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" - -#ifdef HAVE_LIMITS_H -#include <limits.h> -#endif -#ifndef CHAR_BIT -#define CHAR_BIT 8 -#endif - -/* 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); */ - -/* Buffers start at INIT_ALLOC size, and roughly double each time we - go over the current allocation. MALLOC_OVERHEAD is a guess at the - system malloc overhead. We aim to not waste any memory in the - underlying page/chunk allocated by the system malloc. */ -#define MALLOC_OVERHEAD (2 * sizeof (size_t)) -#define INIT_ALLOC (64 - MALLOC_OVERHEAD - 1) - -static void sb_check (sb *, size_t); - -/* Initializes an sb. */ - -void -sb_build (sb *ptr, size_t size) -{ - ptr->ptr = xmalloc (size + 1); - ptr->max = size; - ptr->len = 0; -} - -void -sb_new (sb *ptr) -{ - sb_build (ptr, INIT_ALLOC); -} - -/* Deallocate the sb at ptr. */ - -void -sb_kill (sb *ptr) -{ - free (ptr->ptr); -} - -/* 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 size_t -scrub_from_sb (char *buf, size_t buflen) -{ - size_t 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, size_t len) -{ - size_t want = ptr->len + len; - - if (want > ptr->max) - { - size_t max; - - want += MALLOC_OVERHEAD + 1; - if ((ssize_t) want < 0) - as_fatal ("string buffer overflow"); -#if GCC_VERSION >= 3004 - max = (size_t) 1 << (CHAR_BIT * sizeof (want) - - (sizeof (want) <= sizeof (long) - ? __builtin_clzl ((long) want) - : __builtin_clzll ((long long) want))); -#else - max = 128; - while (want > max) - max <<= 1; -#endif - max -= MALLOC_OVERHEAD + 1; - ptr->max = max; - ptr->ptr = xrealloc (ptr->ptr, max + 1); - } -} - -/* 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, size_t 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) -{ - size_t 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, size_t len) -{ - sb_check (ptr, len); - memcpy (ptr->ptr + ptr->len, s, len); - ptr->len += len; -} - -/* Write terminating NUL and return string. */ - -char * -sb_terminate (sb *in) -{ - in->ptr[in->len] = 0; - 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. */ - -size_t -sb_skip_white (size_t 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. */ - -size_t -sb_skip_comma (size_t 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; -} |