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969b9a3650
The PR gas/16908 workaround aimed at uniformly reporting line numbers to reference macro invocation sites. As mentioned in a comment this may be desirable for small macros, but often isn't for larger ones. As a first step improve diagnostics to report both locations, while aiming at leaving generated debug info unaltered. Note that macro invocation context is lost for any diagnostics issued only after all input was processed (or more generally for any use of as_*_where(), as the functions can't know whether the passed in location is related to [part of] the present stack of locations). To maintain the intended workaround behavior for PR gas/16908, a new as_where() is introduced to "look through" macro invocations, while the existing as_where() is renamed (and used in only very few places for now). Down the road as_where() will likely want to return a list of (file,line) pairs.
76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/* sb.h - header file for string buffer manipulation routines
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Copyright (C) 1994-2022 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 *, size_t);
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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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};
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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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