/* macro.c - macro support for gas and gasp
- Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
Written by Steve and Judy Chamberlain of Cygnus Support,
sac@cygnus.com
02111-1307, USA. */
#include "config.h"
+
+/* AIX requires this to be the first thing in the file. */
+#ifdef __GNUC__
+# ifndef alloca
+# ifdef __STDC__
+extern void *alloca ();
+# else
+extern char *alloca ();
+# endif
+# endif
+#else
+# if HAVE_ALLOCA_H
+# include <alloca.h>
+# else
+# ifdef _AIX
+ #pragma alloca
+# else
+# ifndef alloca /* predefined by HP cc +Olibcalls */
+# if !defined (__STDC__) && !defined (__hpux)
+extern char *alloca ();
+# else
+extern void *alloca ();
+# endif /* __STDC__, __hpux */
+# endif /* alloca */
+# endif /* _AIX */
+# endif /* HAVE_ALLOCA_H */
+#endif
+
#include <stdio.h>
+#ifdef HAVE_STRING_H
#include <string.h>
+#else
+#include <strings.h>
+#endif
#include <ctype.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#include "hash.h"
#include "macro.h"
+#include "asintl.h"
+
/* The routines in this file handle macro definition and expansion.
They are called by both gasp and gas. */
-/* Structures used to store macros.
-
- Each macro knows its name and included text. It gets built with a
- list of formal arguments, and also keeps a hash table which points
- into the list to speed up formal search. Each formal knows its
- name and its default value. Each time the macro is expanded, the
- formals get the actual values attatched to them. */
-
-/* describe the formal arguments to a macro */
-
-typedef struct formal_struct
- {
- struct formal_struct *next; /* next formal in list */
- sb name; /* name of the formal */
- sb def; /* the default value */
- sb actual; /* the actual argument (changed on each expansion) */
- int index; /* the index of the formal 0..formal_count-1 */
- }
-formal_entry;
-
-/* Other values found in the index field of a formal_entry. */
-#define QUAL_INDEX (-1)
-#define NARG_INDEX (-2)
-#define LOCAL_INDEX (-3)
-
-/* describe the macro. */
-
-typedef struct macro_struct
- {
- sb sub; /* substitution text. */
- int formal_count; /* number of formal args. */
- formal_entry *formals; /* pointer to list of formal_structs */
- struct hash_control *formal_hash; /* hash table of formals. */
- }
-macro_entry;
-
/* Internal functions. */
static int get_token PARAMS ((int, sb *, sb *));
#define ISSEP(x) \
((x) == ' ' || (x) == '\t' || (x) == ',' || (x) == '"' || (x) == ';' \
- || (x) == '<' || (x) == '>' || (x) == ')' || (x) == '(')
+ || (x) == ')' || (x) == '(' \
+ || ((macro_alternate || macro_mri) && ((x) == '<' || (x) == '>')))
#define ISBASE(x) \
((x) == 'b' || (x) == 'B' \
macro_expr = expr;
}
+/* Switch in and out of MRI mode on the fly. */
+
+void
+macro_mri_mode (mri)
+ int mri;
+{
+ macro_mri = mri;
+}
+
/* Read input lines till we get to a TO string.
Increase nesting depth if we get a FROM string.
Put the results into sb at PTR.
{
if (ptr->ptr[i] == '.')
i++;
- if (strncasecmp (ptr->ptr + i, from, from_len) == 0)
+ if (strncasecmp (ptr->ptr + i, from, from_len) == 0
+ && (ptr->len == (i + from_len) || ! isalnum (ptr->ptr[i + from_len])))
depth++;
- if (strncasecmp (ptr->ptr + i, to, to_len) == 0)
+ if (strncasecmp (ptr->ptr + i, to, to_len) == 0
+ && (ptr->len == (i + to_len) || ! isalnum (ptr->ptr[i + to_len])))
{
depth--;
if (depth == 0)
while (idx < in->len
&& (in->ptr[idx] == '"'
- || in->ptr[idx] == '<'
+ || (in->ptr[idx] == '<' && (macro_alternate || macro_mri))
|| (in->ptr[idx] == '\'' && macro_alternate)))
{
if (in->ptr[idx] == '<')
{
- if (macro_alternate || macro_mri)
+ int nest = 0;
+ idx++;
+ while ((in->ptr[idx] != '>' || nest)
+ && idx < in->len)
{
- int nest = 0;
- idx++;
- while ((in->ptr[idx] != '>' || nest)
- && idx < in->len)
+ if (in->ptr[idx] == '!')
{
- if (in->ptr[idx] == '!')
- {
- idx++ ;
- sb_add_char (acc, in->ptr[idx++]);
- }
- else
- {
- if (in->ptr[idx] == '>')
- nest--;
- if (in->ptr[idx] == '<')
- nest++;
- sb_add_char (acc, in->ptr[idx++]);
- }
+ idx++ ;
+ sb_add_char (acc, in->ptr[idx++]);
+ }
+ else
+ {
+ if (in->ptr[idx] == '>')
+ nest--;
+ if (in->ptr[idx] == '<')
+ nest++;
+ sb_add_char (acc, in->ptr[idx++]);
}
- idx++;
- }
- else
- {
- int code;
- idx++;
- idx = ((*macro_expr)
- ("character code in string must be absolute expression",
- idx, in, &code));
- sb_add_char (acc, code);
-
-#if 0
- if (in->ptr[idx] != '>')
- ERROR ((stderr, "Missing > for character code.\n"));
-#endif
- idx++;
}
+ idx++;
}
else if (in->ptr[idx] == '"' || in->ptr[idx] == '\'')
{
char tchar = in->ptr[idx];
+ int escaped = 0;
idx++;
while (idx < in->len)
{
+ if (in->ptr[idx-1] == '\\')
+ escaped ^= 1;
+ else
+ escaped = 0;
+
if (macro_alternate && in->ptr[idx] == '!')
{
idx++ ;
sb_add_char (acc, in->ptr[idx++]);
}
+ else if (escaped && in->ptr[idx] == tchar)
+ {
+ sb_add_char (acc, tchar);
+ idx++;
+ }
else
{
if (in->ptr[idx] == tchar)
int val;
char buf[20];
/* Turns the next expression into a string */
- idx = (*macro_expr) ("% operator needs absolute expression",
+ idx = (*macro_expr) (_("% operator needs absolute expression"),
idx + 1,
in,
&val);
sb_add_string (out, buf);
}
else if (in->ptr[idx] == '"'
- || in->ptr[idx] == '<'
+ || (in->ptr[idx] == '<' && (macro_alternate || macro_mri))
|| (macro_alternate && in->ptr[idx] == '\''))
{
- if (macro_alternate && expand)
+ if (macro_alternate
+ && ! macro_strip_at
+ && expand)
{
/* Keep the quotes */
sb_add_char (out, '\"');
|| (in->ptr[idx] != ' '
&& in->ptr[idx] != '\t'
&& in->ptr[idx] != ','
- && in->ptr[idx] != '<')))
+ && (in->ptr[idx] != '<'
+ || (! macro_alternate && ! macro_mri)))))
{
if (in->ptr[idx] == '"'
|| in->ptr[idx] == '\'')
}
/* Define a new macro. Returns NULL on success, otherwise returns an
- error message. */
+ error message. If NAMEP is not NULL, *NAMEP is set to the name of
+ the macro which was defined. */
const char *
-define_macro (idx, in, label, get_line)
+define_macro (idx, in, label, get_line, namep)
int idx;
sb *in;
sb *label;
int (*get_line) PARAMS ((sb *));
+ const char **namep;
{
macro_entry *macro;
sb name;
+ const char *namestr;
macro = (macro_entry *) xmalloc (sizeof (macro_entry));
sb_new (¯o->sub);
idx = sb_skip_white (idx, in);
if (! buffer_and_nest ("MACRO", "ENDM", ¯o->sub, get_line))
- return "unexpected end of file in macro definition";
+ return _("unexpected end of file in macro definition");
if (label != NULL && label->len != 0)
{
sb_add_sb (&name, label);
- if (in->ptr[idx] == '(')
+ if (idx < in->len && in->ptr[idx] == '(')
{
/* It's the label: MACRO (formals,...) sort */
idx = do_formals (macro, idx + 1, in);
if (in->ptr[idx] != ')')
- return "missing ) after formals";
+ return _("missing ) after formals");
}
else
{
/* and stick it in the macro hash table */
for (idx = 0; idx < name.len; idx++)
- if (isupper (name.ptr[idx]))
+ if (isupper ((unsigned char) name.ptr[idx]))
name.ptr[idx] = tolower (name.ptr[idx]);
- hash_jam (macro_hash, sb_terminate (&name), (PTR) macro);
+ namestr = sb_terminate (&name);
+ hash_jam (macro_hash, namestr, (PTR) macro);
macro_defined = 1;
+ if (namep != NULL)
+ *namep = namestr;
+
return NULL;
}
int kind;
{
idx = get_token (idx, in, name);
- if (idx < in->len && in->ptr[idx] == kind
- && (! macro_mri || macro_strip_at))
+ 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 (src, in, t, formal_hash, kind, out, copyifnotthere)
- int src;
+sub_actual (start, in, t, formal_hash, kind, out, copyifnotthere)
+ int start;
sb *in;
sb *t;
struct hash_control *formal_hash;
sb *out;
int copyifnotthere;
{
+ int src;
formal_entry *ptr;
- src = get_apost_token (src, in, t, kind);
- /* See if it's in the macro's hash table */
- ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (t));
+ 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->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);
if (in->ptr[src] == '&')
{
sb_reset (&t);
- if (macro_mri && src + 1 < in->len && in->ptr[src + 1] == '&')
+ if (macro_mri)
{
- src = sub_actual (src + 2, in, &t, formal_hash, '\'', out, 1);
+ 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);
}
}
if (in->ptr[src] == ')')
src++;
else
- return "missplaced )";
+ return _("missplaced )");
}
else if (in->ptr[src] == '@')
{
/* Sub in the macro invocation number */
- char buffer[6];
+ char buffer[10];
src++;
- sprintf (buffer, "%05d", macro_number);
+ sprintf (buffer, "%d", macro_number);
sb_add_string (out, buffer);
}
else if (in->ptr[src] == '&')
src = get_token (src + 2, in, &t);
ptr = (formal_entry *) hash_find (formal_hash, sb_terminate (&t));
if (ptr == NULL)
- return "macro formal argument does not exist";
+ {
+ /* 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)
formal_entry *f;
f = loclist->next;
- hash_delete (formal_hash, sb_terminate (&loclist->name));
+ /* 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);
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;
- if (is_positional)
- return "can't mix positional and keyword arguments";
+
+ /* 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";
+ 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";
+ return _("macro formal argument does not exist");
else
{
/* Insert this value into the right place */
/* This is a positional arg */
is_positional = 1;
if (is_keyword)
- return "can't mix positional and keyword arguments";
+ return _("can't mix positional and keyword arguments");
if (!f)
{
int c;
if (!macro_mri)
- return "too many positional arguments";
+ return _("too many positional arguments");
f = (formal_entry *) xmalloc (sizeof (formal_entry));
sb_new (&f->name);
gasp. Return 1 if a macro is found, 0 otherwise. */
int
-check_macro (line, expand, comment_char, error)
+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;
|| *s == '$')
++s;
- copy = (char *) xmalloc (s - line + 1);
+ copy = (char *) alloca (s - line + 1);
memcpy (copy, line, s - line);
copy[s - line] = '\0';
for (cs = copy; *cs != '\0'; cs++)
- if (isupper (*cs))
+ if (isupper ((unsigned char) *cs))
*cs = tolower (*cs);
macro = (macro_entry *) hash_find (macro_hash, copy);
sb_kill (&line_sb);
+ /* export the macro information if requested */
+ if (info)
+ *info = macro;
+
return 1;
}
sb_new (&sub);
if (! buffer_and_nest (mn, "ENDR", &sub, get_line))
- return "unexpected end of file in irp or irpc";
+ return _("unexpected end of file in irp or irpc");
sb_new (&f.name);
sb_new (&f.def);
idx = get_token (idx, in, &f.name);
if (f.name.len == 0)
- return "missing model parameter";
+ return _("missing model parameter");
h = hash_new ();
err = hash_jam (h, sb_terminate (&f.name), &f);
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