100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/* sb.h - header file for string buffer manipulation routines
|
|
Copyright (C) 1994, 1995, 2000 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 *, int));
|
|
|
|
#endif /* SB_H */
|