diff options
author | Richard Henderson <rth@redhat.com> | 1999-05-03 07:29:11 +0000 |
---|---|---|
committer | Richard Henderson <rth@redhat.com> | 1999-05-03 07:29:11 +0000 |
commit | 252b5132c753830d5fd56823373aed85f2a0db63 (patch) | |
tree | 1af963bfd8d3e55167b81def4207f175eaff3a56 /gas/sb.h | |
download | fsf-binutils-gdb-252b5132c753830d5fd56823373aed85f2a0db63.zip fsf-binutils-gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.gz fsf-binutils-gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.bz2 |
19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'gas/sb.h')
-rw-r--r-- | gas/sb.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/gas/sb.h b/gas/sb.h new file mode 100644 index 0000000..7e6daf1 --- /dev/null +++ b/gas/sb.h @@ -0,0 +1,99 @@ +/* sb.h - header file for string buffer manipulation routines + Copyright (C) 1994, 1995 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 2, 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, 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. */ + +#ifndef SB_H + +#define SB_H + +#include <stdio.h> +#include "ansidecl.h" + +/* string blocks + + I had a couple of choices when deciding upon this data structure. + gas uses null terminated strings for all its internal work. This + often means that parts of the program that want to examine + substrings have to manipulate the data in the string to do the + right thing (a common operation is to single out a bit of text by + saving away the character after it, nulling it out, operating on + the substring and then replacing the character which was under the + null). This is a pain and I remember a load of problems that I had with + code in gas which almost got this right. Also, it's harder to grow and + allocate null terminated strings efficiently. + + Obstacks provide all the functionality needed, but are too + complicated, hence the sb. + + An sb is allocated by the caller, and is initialzed to point to an + sb_element. sb_elements are kept on a free lists, and used when + needed, replaced onto the free list when unused. + */ + +#define sb_max_power_two 30 /* don't allow strings more than + 2^sb_max_power_two long */ +/* structure of an sb */ +typedef struct sb + { + char *ptr; /* points to the current block. */ + int len; /* how much is used. */ + int pot; /* the maximum length is 1<<pot */ + struct le *item; + } +sb; + +/* Structure of the free list object of an sb */ +typedef struct le + { + struct le *next; + int size; + char data[1]; + } +sb_element; + +/* The free list */ +typedef struct + { + sb_element *size[sb_max_power_two]; + } sb_list_vector; + +extern int string_count[sb_max_power_two]; + +extern void sb_build PARAMS ((sb *, int)); +extern void sb_new PARAMS ((sb *)); +extern void sb_kill PARAMS ((sb *)); +extern void sb_add_sb PARAMS ((sb *, sb *)); +extern void sb_reset PARAMS ((sb *)); +extern void sb_add_char PARAMS ((sb *, int)); +extern void sb_add_string PARAMS ((sb *, const char *)); +extern void sb_add_buffer PARAMS ((sb *, const char *, int)); +extern void sb_print PARAMS ((FILE *, sb *)); +extern void sb_print_at PARAMS ((FILE *, int, sb *)); +extern char *sb_name PARAMS ((sb *)); +extern char *sb_terminate PARAMS ((sb *)); +extern int sb_skip_white PARAMS ((int, sb *)); +extern int sb_skip_comma PARAMS ((int, sb *)); + +/* Actually in input-scrub.c. */ +extern void input_scrub_include_sb PARAMS ((sb *, char *)); + +#endif /* SB_H */ |