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77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/* sb.h - header file for string buffer manipulation routines
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Copyright (C) 1994-2024 Free Software Foundation, Inc.
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Written by Steve and Judy Chamberlain of Cygnus Support,
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sac@cygnus.com
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#ifndef SB_H
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#define SB_H
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/* String blocks
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I had a couple of choices when deciding upon this data structure.
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gas uses null terminated strings for all its internal work. This
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often means that parts of the program that want to examine
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substrings have to manipulate the data in the string to do the
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right thing (a common operation is to single out a bit of text by
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saving away the character after it, nulling it out, operating on
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the substring and then replacing the character which was under the
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null). This is a pain and I remember a load of problems that I had with
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code in gas which almost got this right. Also, it's harder to grow and
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allocate null terminated strings efficiently.
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Obstacks provide all the functionality needed, but are too
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complicated, hence the sb.
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An sb is allocated by the caller. */
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typedef struct sb
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{
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char *ptr; /* Points to the current block. */
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size_t len; /* How much is used. */
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size_t max; /* The maximum length. */
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}
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sb;
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extern void sb_new (sb *);
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extern void sb_build (sb *, size_t);
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extern void sb_kill (sb *);
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extern void sb_add_sb (sb *, sb *);
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extern void sb_scrub_and_add_sb (sb *, sb *);
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extern void sb_reset (sb *);
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extern void sb_add_char (sb *, char);
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extern void sb_add_string (sb *, const char *);
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extern void sb_add_buffer (sb *, const char *, size_t);
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extern char *sb_terminate (sb *);
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extern size_t sb_skip_white (size_t, sb *);
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extern size_t sb_skip_comma (size_t, sb *);
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/* Actually in input-scrub.c. */
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enum expansion {
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expanding_none,
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expanding_repeat,
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expanding_macro,
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expanding_app,
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};
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extern void input_scrub_include_sb (sb *, char *, enum expansion);
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#endif /* SB_H */
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