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https://sourceware.org/git/binutils-gdb.git
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1254 lines
28 KiB
C
1254 lines
28 KiB
C
/* macro.c - macro support for gas and gasp
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Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
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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 2, 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, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "config.h"
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#ifndef __GNUC__
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# if HAVE_ALLOCA_H
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# include <alloca.h>
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# else
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# ifdef _AIX
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/* Indented so that pre-ansi C compilers will ignore it, rather than
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choke on it. Some versions of AIX require this to be the first
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thing in the file. */
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#pragma alloca
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# else
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# ifndef alloca /* predefined by HP cc +Olibcalls */
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# if !defined (__STDC__) && !defined (__hpux)
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extern char *alloca ();
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# else
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extern void *alloca ();
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# endif /* __STDC__, __hpux */
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# endif /* alloca */
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# endif /* _AIX */
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# endif /* HAVE_ALLOCA_H */
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#endif /* __GNUC__ */
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#include <stdio.h>
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#include <strings.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include "libiberty.h"
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#include "safe-ctype.h"
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#include "sb.h"
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#include "hash.h"
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#include "macro.h"
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#include "asintl.h"
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/* The routines in this file handle macro definition and expansion.
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They are called by both gasp and gas. */
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/* Internal functions. */
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static int get_token PARAMS ((int, sb *, sb *));
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static int getstring PARAMS ((int, sb *, sb *));
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static int get_any_string PARAMS ((int, sb *, sb *, int, int));
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static int do_formals PARAMS ((macro_entry *, int, sb *));
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static int get_apost_token PARAMS ((int, sb *, sb *, int));
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static int sub_actual
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PARAMS ((int, sb *, sb *, struct hash_control *, int, sb *, int));
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static const char *macro_expand_body
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PARAMS ((sb *, sb *, formal_entry *, struct hash_control *, int, int));
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static const char *macro_expand PARAMS ((int, sb *, macro_entry *, sb *, int));
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#define ISWHITE(x) ((x) == ' ' || (x) == '\t')
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#define ISSEP(x) \
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((x) == ' ' || (x) == '\t' || (x) == ',' || (x) == '"' || (x) == ';' \
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|| (x) == ')' || (x) == '(' \
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|| ((macro_alternate || macro_mri) && ((x) == '<' || (x) == '>')))
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#define ISBASE(x) \
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((x) == 'b' || (x) == 'B' \
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|| (x) == 'q' || (x) == 'Q' \
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|| (x) == 'h' || (x) == 'H' \
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|| (x) == 'd' || (x) == 'D')
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/* The macro hash table. */
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static struct hash_control *macro_hash;
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/* Whether any macros have been defined. */
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int macro_defined;
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/* Whether we are in GASP alternate mode. */
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static int macro_alternate;
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/* Whether we are in MRI mode. */
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static int macro_mri;
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/* Whether we should strip '@' characters. */
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static int macro_strip_at;
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/* Function to use to parse an expression. */
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static int (*macro_expr) PARAMS ((const char *, int, sb *, int *));
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/* Number of macro expansions that have been done. */
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static int macro_number;
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/* Initialize macro processing. */
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void
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macro_init (alternate, mri, strip_at, expr)
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int alternate;
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int mri;
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int strip_at;
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int (*expr) PARAMS ((const char *, int, sb *, int *));
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{
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macro_hash = hash_new ();
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macro_defined = 0;
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macro_alternate = alternate;
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macro_mri = mri;
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macro_strip_at = strip_at;
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macro_expr = expr;
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}
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/* Switch in and out of MRI mode on the fly. */
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void
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macro_mri_mode (mri)
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int mri;
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{
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macro_mri = mri;
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}
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/* Read input lines till we get to a TO string.
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Increase nesting depth if we get a FROM string.
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Put the results into sb at PTR.
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Add a new input line to an sb using GET_LINE.
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Return 1 on success, 0 on unexpected EOF. */
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int
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buffer_and_nest (from, to, ptr, get_line)
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const char *from;
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const char *to;
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sb *ptr;
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int (*get_line) PARAMS ((sb *));
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{
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int from_len = strlen (from);
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int to_len = strlen (to);
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int depth = 1;
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int line_start = ptr->len;
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int more = get_line (ptr);
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while (more)
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{
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/* Try and find the first pseudo op on the line. */
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int i = line_start;
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if (! macro_alternate && ! macro_mri)
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{
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/* With normal syntax we can suck what we want till we get
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to the dot. With the alternate, labels have to start in
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the first column, since we cant tell what's a label and
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whats a pseudoop. */
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/* Skip leading whitespace. */
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while (i < ptr->len && ISWHITE (ptr->ptr[i]))
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i++;
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/* Skip over a label. */
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while (i < ptr->len
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&& (ISALNUM (ptr->ptr[i])
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|| ptr->ptr[i] == '_'
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|| ptr->ptr[i] == '$'))
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i++;
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/* And a colon. */
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if (i < ptr->len
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&& ptr->ptr[i] == ':')
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i++;
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}
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/* Skip trailing whitespace. */
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while (i < ptr->len && ISWHITE (ptr->ptr[i]))
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i++;
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if (i < ptr->len && (ptr->ptr[i] == '.'
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|| macro_alternate
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|| macro_mri))
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{
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if (ptr->ptr[i] == '.')
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i++;
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if (strncasecmp (ptr->ptr + i, from, from_len) == 0
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&& (ptr->len == (i + from_len)
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|| ! ISALNUM (ptr->ptr[i + from_len])))
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depth++;
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if (strncasecmp (ptr->ptr + i, to, to_len) == 0
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&& (ptr->len == (i + to_len)
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|| ! ISALNUM (ptr->ptr[i + to_len])))
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{
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depth--;
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if (depth == 0)
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{
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/* Reset the string to not include the ending rune. */
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ptr->len = line_start;
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break;
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}
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}
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}
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/* Add a CR to the end and keep running. */
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sb_add_char (ptr, '\n');
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line_start = ptr->len;
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more = get_line (ptr);
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}
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/* Return 1 on success, 0 on unexpected EOF. */
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return depth == 0;
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}
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/* Pick up a token. */
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static int
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get_token (idx, in, name)
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int idx;
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sb *in;
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sb *name;
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{
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if (idx < in->len
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&& (ISALPHA (in->ptr[idx])
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|| in->ptr[idx] == '_'
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|| in->ptr[idx] == '$'))
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{
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sb_add_char (name, in->ptr[idx++]);
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while (idx < in->len
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&& (ISALNUM (in->ptr[idx])
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|| in->ptr[idx] == '_'
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|| in->ptr[idx] == '$'))
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{
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sb_add_char (name, in->ptr[idx++]);
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}
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}
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/* Ignore trailing &. */
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if (macro_alternate && idx < in->len && in->ptr[idx] == '&')
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idx++;
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return idx;
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}
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/* Pick up a string. */
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static int
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getstring (idx, in, acc)
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int idx;
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sb *in;
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sb *acc;
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{
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idx = sb_skip_white (idx, in);
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while (idx < in->len
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&& (in->ptr[idx] == '"'
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|| (in->ptr[idx] == '<' && (macro_alternate || macro_mri))
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|| (in->ptr[idx] == '\'' && macro_alternate)))
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{
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if (in->ptr[idx] == '<')
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{
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int nest = 0;
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idx++;
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while ((in->ptr[idx] != '>' || nest)
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&& idx < in->len)
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{
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if (in->ptr[idx] == '!')
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{
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idx++;
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sb_add_char (acc, in->ptr[idx++]);
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}
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else
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{
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if (in->ptr[idx] == '>')
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nest--;
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if (in->ptr[idx] == '<')
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nest++;
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sb_add_char (acc, in->ptr[idx++]);
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}
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}
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idx++;
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}
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else if (in->ptr[idx] == '"' || in->ptr[idx] == '\'')
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{
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char tchar = in->ptr[idx];
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int escaped = 0;
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idx++;
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while (idx < in->len)
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{
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if (in->ptr[idx - 1] == '\\')
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escaped ^= 1;
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else
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escaped = 0;
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if (macro_alternate && in->ptr[idx] == '!')
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{
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idx ++;
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sb_add_char (acc, in->ptr[idx]);
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idx ++;
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}
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else if (escaped && in->ptr[idx] == tchar)
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{
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sb_add_char (acc, tchar);
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idx ++;
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}
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else
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{
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if (in->ptr[idx] == tchar)
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{
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idx ++;
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if (idx >= in->len || in->ptr[idx] != tchar)
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break;
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}
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sb_add_char (acc, in->ptr[idx]);
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idx ++;
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}
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}
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}
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}
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return idx;
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}
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/* Fetch string from the input stream,
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rules:
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'Bxyx<whitespace> -> return 'Bxyza
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%<char> -> return string of decimal value of x
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"<string>" -> return string
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xyx<whitespace> -> return xyz
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*/
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static int
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get_any_string (idx, in, out, expand, pretend_quoted)
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int idx;
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sb *in;
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sb *out;
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int expand;
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int pretend_quoted;
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{
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sb_reset (out);
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idx = sb_skip_white (idx, in);
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if (idx < in->len)
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{
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if (in->len > 2 && in->ptr[idx + 1] == '\'' && ISBASE (in->ptr[idx]))
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{
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while (!ISSEP (in->ptr[idx]))
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sb_add_char (out, in->ptr[idx++]);
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}
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else if (in->ptr[idx] == '%'
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&& macro_alternate
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&& expand)
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{
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int val;
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char buf[20];
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/* Turns the next expression into a string. */
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/* xgettext: no-c-format */
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idx = (*macro_expr) (_("% operator needs absolute expression"),
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idx + 1,
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in,
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&val);
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sprintf(buf, "%d", val);
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sb_add_string (out, buf);
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}
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else if (in->ptr[idx] == '"'
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|| (in->ptr[idx] == '<' && (macro_alternate || macro_mri))
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|| (macro_alternate && in->ptr[idx] == '\''))
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{
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if (macro_alternate
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&& ! macro_strip_at
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&& expand)
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{
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/* Keep the quotes. */
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sb_add_char (out, '\"');
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idx = getstring (idx, in, out);
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sb_add_char (out, '\"');
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}
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else
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{
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idx = getstring (idx, in, out);
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}
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}
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else
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{
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while (idx < in->len
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&& (in->ptr[idx] == '"'
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|| in->ptr[idx] == '\''
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|| pretend_quoted
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|| (in->ptr[idx] != ' '
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&& in->ptr[idx] != '\t'
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&& in->ptr[idx] != ','
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&& (in->ptr[idx] != '<'
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|| (! macro_alternate && ! macro_mri)))))
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{
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if (in->ptr[idx] == '"'
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|| in->ptr[idx] == '\'')
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{
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char tchar = in->ptr[idx];
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sb_add_char (out, in->ptr[idx++]);
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while (idx < in->len
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&& in->ptr[idx] != tchar)
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sb_add_char (out, in->ptr[idx++]);
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if (idx == in->len)
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return idx;
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}
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sb_add_char (out, in->ptr[idx++]);
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}
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}
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}
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return idx;
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}
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/* Pick up the formal parameters of a macro definition. */
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static int
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do_formals (macro, idx, in)
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macro_entry *macro;
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int idx;
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sb *in;
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{
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formal_entry **p = ¯o->formals;
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macro->formal_count = 0;
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macro->formal_hash = hash_new ();
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while (idx < in->len)
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{
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formal_entry *formal;
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formal = (formal_entry *) xmalloc (sizeof (formal_entry));
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sb_new (&formal->name);
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sb_new (&formal->def);
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sb_new (&formal->actual);
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idx = sb_skip_white (idx, in);
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idx = get_token (idx, in, &formal->name);
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if (formal->name.len == 0)
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break;
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idx = sb_skip_white (idx, in);
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if (formal->name.len)
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{
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/* This is a formal. */
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if (idx < in->len && in->ptr[idx] == '=')
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{
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/* Got a default. */
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idx = get_any_string (idx + 1, in, &formal->def, 1, 0);
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}
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}
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/* Add to macro's hash table. */
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hash_jam (macro->formal_hash, sb_terminate (&formal->name), formal);
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formal->index = macro->formal_count;
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idx = sb_skip_comma (idx, in);
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macro->formal_count++;
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*p = formal;
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p = &formal->next;
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*p = NULL;
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}
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if (macro_mri)
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{
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formal_entry *formal;
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const char *name;
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/* Add a special NARG formal, which macro_expand will set to the
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number of arguments. */
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formal = (formal_entry *) xmalloc (sizeof (formal_entry));
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sb_new (&formal->name);
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sb_new (&formal->def);
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sb_new (&formal->actual);
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/* The same MRI assemblers which treat '@' characters also use
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the name $NARG. At least until we find an exception. */
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if (macro_strip_at)
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name = "$NARG";
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else
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name = "NARG";
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sb_add_string (&formal->name, name);
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/* Add to macro's hash table. */
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hash_jam (macro->formal_hash, name, formal);
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formal->index = NARG_INDEX;
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*p = formal;
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formal->next = NULL;
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}
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return idx;
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}
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/* Define a new macro. Returns NULL on success, otherwise returns an
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error message. If NAMEP is not NULL, *NAMEP is set to the name of
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the macro which was defined. */
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const char *
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define_macro (idx, in, label, get_line, namep)
|
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int idx;
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sb *in;
|
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sb *label;
|
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int (*get_line) PARAMS ((sb *));
|
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const char **namep;
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{
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macro_entry *macro;
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sb name;
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const char *namestr;
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macro = (macro_entry *) xmalloc (sizeof (macro_entry));
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sb_new (¯o->sub);
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sb_new (&name);
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macro->formal_count = 0;
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macro->formals = 0;
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idx = sb_skip_white (idx, in);
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if (! buffer_and_nest ("MACRO", "ENDM", ¯o->sub, get_line))
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return _("unexpected end of file in macro definition");
|
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if (label != NULL && label->len != 0)
|
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{
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sb_add_sb (&name, label);
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if (idx < in->len && in->ptr[idx] == '(')
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{
|
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/* It's the label: MACRO (formals,...) sort */
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idx = do_formals (macro, idx + 1, in);
|
|
if (in->ptr[idx] != ')')
|
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return _("missing ) after formals");
|
|
}
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|
else
|
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{
|
|
/* It's the label: MACRO formals,... sort */
|
|
idx = do_formals (macro, idx, in);
|
|
}
|
|
}
|
|
else
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{
|
|
idx = get_token (idx, in, &name);
|
|
idx = sb_skip_comma (idx, in);
|
|
idx = do_formals (macro, idx, in);
|
|
}
|
|
|
|
/* And stick it in the macro hash table. */
|
|
for (idx = 0; idx < name.len; idx++)
|
|
name.ptr[idx] = TOLOWER (name.ptr[idx]);
|
|
namestr = sb_terminate (&name);
|
|
hash_jam (macro_hash, namestr, (PTR) macro);
|
|
|
|
macro_defined = 1;
|
|
|
|
if (namep != NULL)
|
|
*namep = namestr;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Scan a token, and then skip KIND. */
|
|
|
|
static int
|
|
get_apost_token (idx, in, name, kind)
|
|
int idx;
|
|
sb *in;
|
|
sb *name;
|
|
int kind;
|
|
{
|
|
idx = get_token (idx, in, name);
|
|
if (idx < in->len
|
|
&& in->ptr[idx] == kind
|
|
&& (! macro_mri || macro_strip_at)
|
|
&& (! macro_strip_at || kind == '@'))
|
|
idx++;
|
|
return idx;
|
|
}
|
|
|
|
/* Substitute the actual value for a formal parameter. */
|
|
|
|
static int
|
|
sub_actual (start, in, t, formal_hash, kind, out, copyifnotthere)
|
|
int start;
|
|
sb *in;
|
|
sb *t;
|
|
struct hash_control *formal_hash;
|
|
int kind;
|
|
sb *out;
|
|
int copyifnotthere;
|
|
{
|
|
int src;
|
|
formal_entry *ptr;
|
|
|
|
src = get_apost_token (start, in, t, kind);
|
|
/* See if it's in the macro's hash table, unless this is
|
|
macro_strip_at and kind is '@' and the token did not end in '@'. */
|
|
if (macro_strip_at
|
|
&& kind == '@'
|
|
&& (src == start || in->ptr[src - 1] != '@'))
|
|
ptr = NULL;
|
|
else
|
|
ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (t));
|
|
if (ptr)
|
|
{
|
|
if (ptr->actual.len)
|
|
{
|
|
sb_add_sb (out, &ptr->actual);
|
|
}
|
|
else
|
|
{
|
|
sb_add_sb (out, &ptr->def);
|
|
}
|
|
}
|
|
else if (kind == '&')
|
|
{
|
|
/* Doing this permits people to use & in macro bodies. */
|
|
sb_add_char (out, '&');
|
|
}
|
|
else if (copyifnotthere)
|
|
{
|
|
sb_add_sb (out, t);
|
|
}
|
|
else
|
|
{
|
|
sb_add_char (out, '\\');
|
|
sb_add_sb (out, t);
|
|
}
|
|
return src;
|
|
}
|
|
|
|
/* Expand the body of a macro. */
|
|
|
|
static const char *
|
|
macro_expand_body (in, out, formals, formal_hash, comment_char, locals)
|
|
sb *in;
|
|
sb *out;
|
|
formal_entry *formals;
|
|
struct hash_control *formal_hash;
|
|
int comment_char;
|
|
int locals;
|
|
{
|
|
sb t;
|
|
int src = 0;
|
|
int inquote = 0;
|
|
formal_entry *loclist = NULL;
|
|
|
|
sb_new (&t);
|
|
|
|
while (src < in->len)
|
|
{
|
|
if (in->ptr[src] == '&')
|
|
{
|
|
sb_reset (&t);
|
|
if (macro_mri)
|
|
{
|
|
if (src + 1 < in->len && in->ptr[src + 1] == '&')
|
|
src = sub_actual (src + 2, in, &t, formal_hash, '\'', out, 1);
|
|
else
|
|
sb_add_char (out, in->ptr[src++]);
|
|
}
|
|
else
|
|
{
|
|
/* FIXME: Why do we do this? */
|
|
src = sub_actual (src + 1, in, &t, formal_hash, '&', out, 0);
|
|
}
|
|
}
|
|
else if (in->ptr[src] == '\\')
|
|
{
|
|
src++;
|
|
if (in->ptr[src] == comment_char && comment_char != '\0')
|
|
{
|
|
/* This is a comment, just drop the rest of the line. */
|
|
while (src < in->len
|
|
&& in->ptr[src] != '\n')
|
|
src++;
|
|
}
|
|
else if (in->ptr[src] == '(')
|
|
{
|
|
/* Sub in till the next ')' literally. */
|
|
src++;
|
|
while (src < in->len && in->ptr[src] != ')')
|
|
{
|
|
sb_add_char (out, in->ptr[src++]);
|
|
}
|
|
if (in->ptr[src] == ')')
|
|
src++;
|
|
else
|
|
return _("missplaced )");
|
|
}
|
|
else if (in->ptr[src] == '@')
|
|
{
|
|
/* Sub in the macro invocation number. */
|
|
|
|
char buffer[10];
|
|
src++;
|
|
sprintf (buffer, "%d", macro_number);
|
|
sb_add_string (out, buffer);
|
|
}
|
|
else if (in->ptr[src] == '&')
|
|
{
|
|
/* This is a preprocessor variable name, we don't do them
|
|
here. */
|
|
sb_add_char (out, '\\');
|
|
sb_add_char (out, '&');
|
|
src++;
|
|
}
|
|
else if (macro_mri && ISALNUM (in->ptr[src]))
|
|
{
|
|
int ind;
|
|
formal_entry *f;
|
|
|
|
if (ISDIGIT (in->ptr[src]))
|
|
ind = in->ptr[src] - '0';
|
|
else if (ISUPPER (in->ptr[src]))
|
|
ind = in->ptr[src] - 'A' + 10;
|
|
else
|
|
ind = in->ptr[src] - 'a' + 10;
|
|
++src;
|
|
for (f = formals; f != NULL; f = f->next)
|
|
{
|
|
if (f->index == ind - 1)
|
|
{
|
|
if (f->actual.len != 0)
|
|
sb_add_sb (out, &f->actual);
|
|
else
|
|
sb_add_sb (out, &f->def);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sb_reset (&t);
|
|
src = sub_actual (src, in, &t, formal_hash, '\'', out, 0);
|
|
}
|
|
}
|
|
else if ((macro_alternate || macro_mri)
|
|
&& (ISALPHA (in->ptr[src])
|
|
|| in->ptr[src] == '_'
|
|
|| in->ptr[src] == '$')
|
|
&& (! inquote
|
|
|| ! macro_strip_at
|
|
|| (src > 0 && in->ptr[src - 1] == '@')))
|
|
{
|
|
if (! locals
|
|
|| src + 5 >= in->len
|
|
|| strncasecmp (in->ptr + src, "LOCAL", 5) != 0
|
|
|| ! ISWHITE (in->ptr[src + 5]))
|
|
{
|
|
sb_reset (&t);
|
|
src = sub_actual (src, in, &t, formal_hash,
|
|
(macro_strip_at && inquote) ? '@' : '\'',
|
|
out, 1);
|
|
}
|
|
else
|
|
{
|
|
formal_entry *f;
|
|
|
|
src = sb_skip_white (src + 5, in);
|
|
while (in->ptr[src] != '\n' && in->ptr[src] != comment_char)
|
|
{
|
|
static int loccnt;
|
|
char buf[20];
|
|
const char *err;
|
|
|
|
f = (formal_entry *) xmalloc (sizeof (formal_entry));
|
|
sb_new (&f->name);
|
|
sb_new (&f->def);
|
|
sb_new (&f->actual);
|
|
f->index = LOCAL_INDEX;
|
|
f->next = loclist;
|
|
loclist = f;
|
|
|
|
src = get_token (src, in, &f->name);
|
|
++loccnt;
|
|
sprintf (buf, "LL%04x", loccnt);
|
|
sb_add_string (&f->actual, buf);
|
|
|
|
err = hash_jam (formal_hash, sb_terminate (&f->name), f);
|
|
if (err != NULL)
|
|
return err;
|
|
|
|
src = sb_skip_comma (src, in);
|
|
}
|
|
}
|
|
}
|
|
else if (comment_char != '\0'
|
|
&& in->ptr[src] == comment_char
|
|
&& src + 1 < in->len
|
|
&& in->ptr[src + 1] == comment_char
|
|
&& !inquote)
|
|
{
|
|
/* Two comment chars in a row cause the rest of the line to
|
|
be dropped. */
|
|
while (src < in->len && in->ptr[src] != '\n')
|
|
src++;
|
|
}
|
|
else if (in->ptr[src] == '"'
|
|
|| (macro_mri && in->ptr[src] == '\''))
|
|
{
|
|
inquote = !inquote;
|
|
sb_add_char (out, in->ptr[src++]);
|
|
}
|
|
else if (in->ptr[src] == '@' && macro_strip_at)
|
|
{
|
|
++src;
|
|
if (src < in->len
|
|
&& in->ptr[src] == '@')
|
|
{
|
|
sb_add_char (out, '@');
|
|
++src;
|
|
}
|
|
}
|
|
else if (macro_mri
|
|
&& in->ptr[src] == '='
|
|
&& src + 1 < in->len
|
|
&& in->ptr[src + 1] == '=')
|
|
{
|
|
formal_entry *ptr;
|
|
|
|
sb_reset (&t);
|
|
src = get_token (src + 2, in, &t);
|
|
ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (&t));
|
|
if (ptr == NULL)
|
|
{
|
|
/* FIXME: We should really return a warning string here,
|
|
but we can't, because the == might be in the MRI
|
|
comment field, and, since the nature of the MRI
|
|
comment field depends upon the exact instruction
|
|
being used, we don't have enough information here to
|
|
figure out whether it is or not. Instead, we leave
|
|
the == in place, which should cause a syntax error if
|
|
it is not in a comment. */
|
|
sb_add_char (out, '=');
|
|
sb_add_char (out, '=');
|
|
sb_add_sb (out, &t);
|
|
}
|
|
else
|
|
{
|
|
if (ptr->actual.len)
|
|
{
|
|
sb_add_string (out, "-1");
|
|
}
|
|
else
|
|
{
|
|
sb_add_char (out, '0');
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sb_add_char (out, in->ptr[src++]);
|
|
}
|
|
}
|
|
|
|
sb_kill (&t);
|
|
|
|
while (loclist != NULL)
|
|
{
|
|
formal_entry *f;
|
|
|
|
f = loclist->next;
|
|
/* Setting the value to NULL effectively deletes the entry. We
|
|
avoid calling hash_delete because it doesn't reclaim memory. */
|
|
hash_jam (formal_hash, sb_terminate (&loclist->name), NULL);
|
|
sb_kill (&loclist->name);
|
|
sb_kill (&loclist->def);
|
|
sb_kill (&loclist->actual);
|
|
free (loclist);
|
|
loclist = f;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Assign values to the formal parameters of a macro, and expand the
|
|
body. */
|
|
|
|
static const char *
|
|
macro_expand (idx, in, m, out, comment_char)
|
|
int idx;
|
|
sb *in;
|
|
macro_entry *m;
|
|
sb *out;
|
|
int comment_char;
|
|
{
|
|
sb t;
|
|
formal_entry *ptr;
|
|
formal_entry *f;
|
|
int is_positional = 0;
|
|
int is_keyword = 0;
|
|
int narg = 0;
|
|
const char *err;
|
|
|
|
sb_new (&t);
|
|
|
|
/* Reset any old value the actuals may have. */
|
|
for (f = m->formals; f; f = f->next)
|
|
sb_reset (&f->actual);
|
|
f = m->formals;
|
|
while (f != NULL && f->index < 0)
|
|
f = f->next;
|
|
|
|
if (macro_mri)
|
|
{
|
|
/* The macro may be called with an optional qualifier, which may
|
|
be referred to in the macro body as \0. */
|
|
if (idx < in->len && in->ptr[idx] == '.')
|
|
{
|
|
/* The Microtec assembler ignores this if followed by a white space.
|
|
(Macro invocation with empty extension) */
|
|
idx++;
|
|
if ( idx < in->len
|
|
&& in->ptr[idx] != ' '
|
|
&& in->ptr[idx] != '\t')
|
|
{
|
|
formal_entry *n;
|
|
|
|
n = (formal_entry *) xmalloc (sizeof (formal_entry));
|
|
sb_new (&n->name);
|
|
sb_new (&n->def);
|
|
sb_new (&n->actual);
|
|
n->index = QUAL_INDEX;
|
|
|
|
n->next = m->formals;
|
|
m->formals = n;
|
|
|
|
idx = get_any_string (idx, in, &n->actual, 1, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Peel off the actuals and store them away in the hash tables' actuals. */
|
|
idx = sb_skip_white (idx, in);
|
|
while (idx < in->len && in->ptr[idx] != comment_char)
|
|
{
|
|
int scan;
|
|
|
|
/* Look and see if it's a positional or keyword arg. */
|
|
scan = idx;
|
|
while (scan < in->len
|
|
&& !ISSEP (in->ptr[scan])
|
|
&& !(macro_mri && in->ptr[scan] == '\'')
|
|
&& (!macro_alternate && in->ptr[scan] != '='))
|
|
scan++;
|
|
if (scan < in->len && !macro_alternate && in->ptr[scan] == '=')
|
|
{
|
|
is_keyword = 1;
|
|
|
|
/* It's OK to go from positional to keyword. */
|
|
|
|
/* This is a keyword arg, fetch the formal name and
|
|
then the actual stuff. */
|
|
sb_reset (&t);
|
|
idx = get_token (idx, in, &t);
|
|
if (in->ptr[idx] != '=')
|
|
return _("confusion in formal parameters");
|
|
|
|
/* Lookup the formal in the macro's list. */
|
|
ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t));
|
|
if (!ptr)
|
|
return _("macro formal argument does not exist");
|
|
else
|
|
{
|
|
/* Insert this value into the right place. */
|
|
sb_reset (&ptr->actual);
|
|
idx = get_any_string (idx + 1, in, &ptr->actual, 0, 0);
|
|
if (ptr->actual.len > 0)
|
|
++narg;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* This is a positional arg. */
|
|
is_positional = 1;
|
|
if (is_keyword)
|
|
return _("can't mix positional and keyword arguments");
|
|
|
|
if (!f)
|
|
{
|
|
formal_entry **pf;
|
|
int c;
|
|
|
|
if (!macro_mri)
|
|
return _("too many positional arguments");
|
|
|
|
f = (formal_entry *) xmalloc (sizeof (formal_entry));
|
|
sb_new (&f->name);
|
|
sb_new (&f->def);
|
|
sb_new (&f->actual);
|
|
f->next = NULL;
|
|
|
|
c = -1;
|
|
for (pf = &m->formals; *pf != NULL; pf = &(*pf)->next)
|
|
if ((*pf)->index >= c)
|
|
c = (*pf)->index + 1;
|
|
if (c == -1)
|
|
c = 0;
|
|
*pf = f;
|
|
f->index = c;
|
|
}
|
|
|
|
sb_reset (&f->actual);
|
|
idx = get_any_string (idx, in, &f->actual, 1, 0);
|
|
if (f->actual.len > 0)
|
|
++narg;
|
|
do
|
|
{
|
|
f = f->next;
|
|
}
|
|
while (f != NULL && f->index < 0);
|
|
}
|
|
|
|
if (! macro_mri)
|
|
idx = sb_skip_comma (idx, in);
|
|
else
|
|
{
|
|
if (in->ptr[idx] == ',')
|
|
++idx;
|
|
if (ISWHITE (in->ptr[idx]))
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (macro_mri)
|
|
{
|
|
char buffer[20];
|
|
|
|
sb_reset (&t);
|
|
sb_add_string (&t, macro_strip_at ? "$NARG" : "NARG");
|
|
ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t));
|
|
sb_reset (&ptr->actual);
|
|
sprintf (buffer, "%d", narg);
|
|
sb_add_string (&ptr->actual, buffer);
|
|
}
|
|
|
|
err = macro_expand_body (&m->sub, out, m->formals, m->formal_hash,
|
|
comment_char, 1);
|
|
if (err != NULL)
|
|
return err;
|
|
|
|
/* Discard any unnamed formal arguments. */
|
|
if (macro_mri)
|
|
{
|
|
formal_entry **pf;
|
|
|
|
pf = &m->formals;
|
|
while (*pf != NULL)
|
|
{
|
|
if ((*pf)->name.len != 0)
|
|
pf = &(*pf)->next;
|
|
else
|
|
{
|
|
sb_kill (&(*pf)->name);
|
|
sb_kill (&(*pf)->def);
|
|
sb_kill (&(*pf)->actual);
|
|
f = (*pf)->next;
|
|
free (*pf);
|
|
*pf = f;
|
|
}
|
|
}
|
|
}
|
|
|
|
sb_kill (&t);
|
|
macro_number++;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Check for a macro. If one is found, put the expansion into
|
|
*EXPAND. COMMENT_CHAR is the comment character--this is used by
|
|
gasp. Return 1 if a macro is found, 0 otherwise. */
|
|
|
|
int
|
|
check_macro (line, expand, comment_char, error, info)
|
|
const char *line;
|
|
sb *expand;
|
|
int comment_char;
|
|
const char **error;
|
|
macro_entry **info;
|
|
{
|
|
const char *s;
|
|
char *copy, *cs;
|
|
macro_entry *macro;
|
|
sb line_sb;
|
|
|
|
if (! ISALPHA (*line)
|
|
&& *line != '_'
|
|
&& *line != '$'
|
|
&& (! macro_mri || *line != '.'))
|
|
return 0;
|
|
|
|
s = line + 1;
|
|
while (ISALNUM (*s)
|
|
|| *s == '_'
|
|
|| *s == '$')
|
|
++s;
|
|
|
|
copy = (char *) alloca (s - line + 1);
|
|
memcpy (copy, line, s - line);
|
|
copy[s - line] = '\0';
|
|
for (cs = copy; *cs != '\0'; cs++)
|
|
*cs = TOLOWER (*cs);
|
|
|
|
macro = (macro_entry *) hash_find (macro_hash, copy);
|
|
|
|
if (macro == NULL)
|
|
return 0;
|
|
|
|
/* Wrap the line up in an sb. */
|
|
sb_new (&line_sb);
|
|
while (*s != '\0' && *s != '\n' && *s != '\r')
|
|
sb_add_char (&line_sb, *s++);
|
|
|
|
sb_new (expand);
|
|
*error = macro_expand (0, &line_sb, macro, expand, comment_char);
|
|
|
|
sb_kill (&line_sb);
|
|
|
|
/* Export the macro information if requested. */
|
|
if (info)
|
|
*info = macro;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Delete a macro. */
|
|
|
|
void
|
|
delete_macro (name)
|
|
const char *name;
|
|
{
|
|
hash_delete (macro_hash, name);
|
|
}
|
|
|
|
/* Handle the MRI IRP and IRPC pseudo-ops. These are handled as a
|
|
combined macro definition and execution. This returns NULL on
|
|
success, or an error message otherwise. */
|
|
|
|
const char *
|
|
expand_irp (irpc, idx, in, out, get_line, comment_char)
|
|
int irpc;
|
|
int idx;
|
|
sb *in;
|
|
sb *out;
|
|
int (*get_line) PARAMS ((sb *));
|
|
int comment_char;
|
|
{
|
|
const char *mn;
|
|
sb sub;
|
|
formal_entry f;
|
|
struct hash_control *h;
|
|
const char *err;
|
|
|
|
if (irpc)
|
|
mn = "IRPC";
|
|
else
|
|
mn = "IRP";
|
|
|
|
idx = sb_skip_white (idx, in);
|
|
|
|
sb_new (&sub);
|
|
if (! buffer_and_nest (mn, "ENDR", &sub, get_line))
|
|
return _("unexpected end of file in irp or irpc");
|
|
|
|
sb_new (&f.name);
|
|
sb_new (&f.def);
|
|
sb_new (&f.actual);
|
|
|
|
idx = get_token (idx, in, &f.name);
|
|
if (f.name.len == 0)
|
|
return _("missing model parameter");
|
|
|
|
h = hash_new ();
|
|
err = hash_jam (h, sb_terminate (&f.name), &f);
|
|
if (err != NULL)
|
|
return err;
|
|
|
|
f.index = 1;
|
|
f.next = NULL;
|
|
|
|
sb_reset (out);
|
|
|
|
idx = sb_skip_comma (idx, in);
|
|
if (idx >= in->len || in->ptr[idx] == comment_char)
|
|
{
|
|
/* Expand once with a null string. */
|
|
err = macro_expand_body (&sub, out, &f, h, comment_char, 0);
|
|
if (err != NULL)
|
|
return err;
|
|
}
|
|
else
|
|
{
|
|
if (irpc && in->ptr[idx] == '"')
|
|
++idx;
|
|
while (idx < in->len && in->ptr[idx] != comment_char)
|
|
{
|
|
if (!irpc)
|
|
idx = get_any_string (idx, in, &f.actual, 1, 0);
|
|
else
|
|
{
|
|
if (in->ptr[idx] == '"')
|
|
{
|
|
int nxt;
|
|
|
|
nxt = sb_skip_white (idx + 1, in);
|
|
if (nxt >= in->len || in->ptr[nxt] == comment_char)
|
|
{
|
|
idx = nxt;
|
|
break;
|
|
}
|
|
}
|
|
sb_reset (&f.actual);
|
|
sb_add_char (&f.actual, in->ptr[idx]);
|
|
++idx;
|
|
}
|
|
err = macro_expand_body (&sub, out, &f, h, comment_char, 0);
|
|
if (err != NULL)
|
|
return err;
|
|
if (!irpc)
|
|
idx = sb_skip_comma (idx, in);
|
|
else
|
|
idx = sb_skip_white (idx, in);
|
|
}
|
|
}
|
|
|
|
hash_die (h);
|
|
sb_kill (&sub);
|
|
|
|
return NULL;
|
|
}
|