| /* macro.c - macro support for gas |
| Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
| 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. */ |
| |
| #include "config.h" |
| |
| #ifndef __GNUC__ |
| # if HAVE_ALLOCA_H |
| # include <alloca.h> |
| # else |
| # ifdef _AIX |
| /* Indented so that pre-ansi C compilers will ignore it, rather than |
| choke on it. Some versions of AIX require this to be the first |
| thing in the file. */ |
| #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 /* __GNUC__ */ |
| |
| #include <stdio.h> |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #else |
| #include <strings.h> |
| #endif |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #include "as.h" |
| #include "libiberty.h" |
| #include "safe-ctype.h" |
| #include "sb.h" |
| #include "hash.h" |
| #include "macro.h" |
| |
| #include "asintl.h" |
| |
| /* The routines in this file handle macro definition and expansion. |
| They are called by gas. */ |
| |
| /* Internal functions. */ |
| |
| static int get_token (int, sb *, sb *); |
| static int getstring (int, sb *, sb *); |
| static int get_any_string (int, sb *, sb *, int, int); |
| static int do_formals (macro_entry *, int, sb *); |
| static int get_apost_token (int, sb *, sb *, int); |
| static int sub_actual (int, sb *, sb *, struct hash_control *, int, sb *, int); |
| static const char *macro_expand_body |
| (sb *, sb *, formal_entry *, struct hash_control *, int); |
| static const char *macro_expand (int, sb *, macro_entry *, sb *); |
| |
| #define ISWHITE(x) ((x) == ' ' || (x) == '\t') |
| |
| #define ISSEP(x) \ |
| ((x) == ' ' || (x) == '\t' || (x) == ',' || (x) == '"' || (x) == ';' \ |
| || (x) == ')' || (x) == '(' \ |
| || ((macro_alternate || macro_mri) && ((x) == '<' || (x) == '>'))) |
| |
| #define ISBASE(x) \ |
| ((x) == 'b' || (x) == 'B' \ |
| || (x) == 'q' || (x) == 'Q' \ |
| || (x) == 'h' || (x) == 'H' \ |
| || (x) == 'd' || (x) == 'D') |
| |
| /* The macro hash table. */ |
| |
| struct hash_control *macro_hash; |
| |
| /* Whether any macros have been defined. */ |
| |
| int macro_defined; |
| |
| /* Whether we are in alternate syntax mode. */ |
| |
| static int macro_alternate; |
| |
| /* Whether we are in MRI mode. */ |
| |
| static int macro_mri; |
| |
| /* Whether we should strip '@' characters. */ |
| |
| static int macro_strip_at; |
| |
| /* Function to use to parse an expression. */ |
| |
| static int (*macro_expr) (const char *, int, sb *, int *); |
| |
| /* Number of macro expansions that have been done. */ |
| |
| static int macro_number; |
| |
| /* Initialize macro processing. */ |
| |
| void |
| macro_init (int alternate, int mri, int strip_at, |
| int (*expr) (const char *, int, sb *, int *)) |
| { |
| macro_hash = hash_new (); |
| macro_defined = 0; |
| macro_alternate = alternate; |
| macro_mri = mri; |
| macro_strip_at = strip_at; |
| macro_expr = expr; |
| } |
| |
| /* Switch in and out of alternate mode on the fly. */ |
| |
| void |
| macro_set_alternate (int alternate) |
| { |
| macro_alternate = alternate; |
| } |
| |
| /* Switch in and out of MRI mode on the fly. */ |
| |
| void |
| macro_mri_mode (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. |
| Add a new input line to an sb using GET_LINE. |
| Return 1 on success, 0 on unexpected EOF. */ |
| |
| int |
| buffer_and_nest (const char *from, const char *to, sb *ptr, |
| int (*get_line) (sb *)) |
| { |
| int from_len = strlen (from); |
| int to_len = strlen (to); |
| int depth = 1; |
| int line_start = ptr->len; |
| |
| int more = get_line (ptr); |
| |
| while (more) |
| { |
| /* Try and find the first pseudo op on the line. */ |
| int i = line_start; |
| |
| if (! macro_alternate && ! macro_mri) |
| { |
| /* With normal syntax we can suck what we want till we get |
| to the dot. With the alternate, labels have to start in |
| the first column, since we cant tell what's a label and |
| whats a pseudoop. */ |
| |
| /* Skip leading whitespace. */ |
| while (i < ptr->len && ISWHITE (ptr->ptr[i])) |
| i++; |
| |
| /* Skip over a label. */ |
| while (i < ptr->len |
| && (ISALNUM (ptr->ptr[i]) |
| || ptr->ptr[i] == '_' |
| || ptr->ptr[i] == '$')) |
| i++; |
| |
| /* And a colon. */ |
| if (i < ptr->len |
| && ptr->ptr[i] == ':') |
| i++; |
| |
| } |
| /* Skip trailing whitespace. */ |
| while (i < ptr->len && ISWHITE (ptr->ptr[i])) |
| i++; |
| |
| if (i < ptr->len && (ptr->ptr[i] == '.' |
| || macro_alternate |
| || macro_mri)) |
| { |
| if (ptr->ptr[i] == '.') |
| i++; |
| if (strncasecmp (ptr->ptr + i, from, from_len) == 0 |
| && (ptr->len == (i + from_len) |
| || ! ISALNUM (ptr->ptr[i + from_len]))) |
| depth++; |
| if (strncasecmp (ptr->ptr + i, to, to_len) == 0 |
| && (ptr->len == (i + to_len) |
| || ! ISALNUM (ptr->ptr[i + to_len]))) |
| { |
| depth--; |
| if (depth == 0) |
| { |
| /* Reset the string to not include the ending rune. */ |
| ptr->len = line_start; |
| break; |
| } |
| } |
| } |
| |
| /* Add the original end-of-line char to the end and keep running. */ |
| sb_add_char (ptr, more); |
| line_start = ptr->len; |
| more = get_line (ptr); |
| } |
| |
| /* Return 1 on success, 0 on unexpected EOF. */ |
| return depth == 0; |
| } |
| |
| /* Pick up a token. */ |
| |
| static int |
| get_token (int idx, sb *in, sb *name) |
| { |
| if (idx < in->len |
| && (ISALPHA (in->ptr[idx]) |
| || in->ptr[idx] == '_' |
| || in->ptr[idx] == '$')) |
| { |
| sb_add_char (name, in->ptr[idx++]); |
| while (idx < in->len |
| && (ISALNUM (in->ptr[idx]) |
| || in->ptr[idx] == '_' |
| || in->ptr[idx] == '$')) |
| { |
| sb_add_char (name, in->ptr[idx++]); |
| } |
| } |
| /* Ignore trailing &. */ |
| if (macro_alternate && idx < in->len && in->ptr[idx] == '&') |
| idx++; |
| return idx; |
| } |
| |
| /* Pick up a string. */ |
| |
| static int |
| getstring (int idx, sb *in, sb *acc) |
| { |
| idx = sb_skip_white (idx, in); |
| |
| while (idx < in->len |
| && (in->ptr[idx] == '"' |
| || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) |
| || (in->ptr[idx] == '\'' && macro_alternate))) |
| { |
| if (in->ptr[idx] == '<') |
| { |
| int nest = 0; |
| idx++; |
| while ((in->ptr[idx] != '>' || nest) |
| && idx < in->len) |
| { |
| 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++; |
| } |
| 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]); |
| |
| idx ++; |
| } |
| else if (escaped && in->ptr[idx] == tchar) |
| { |
| sb_add_char (acc, tchar); |
| idx ++; |
| } |
| else |
| { |
| if (in->ptr[idx] == tchar) |
| { |
| idx ++; |
| |
| if (idx >= in->len || in->ptr[idx] != tchar) |
| break; |
| } |
| |
| sb_add_char (acc, in->ptr[idx]); |
| idx ++; |
| } |
| } |
| } |
| } |
| |
| return idx; |
| } |
| |
| /* Fetch string from the input stream, |
| rules: |
| 'Bxyx<whitespace> -> return 'Bxyza |
| %<char> -> return string of decimal value of x |
| "<string>" -> return string |
| xyx<whitespace> -> return xyz |
| */ |
| |
| static int |
| get_any_string (int idx, sb *in, sb *out, int expand, int pretend_quoted) |
| { |
| sb_reset (out); |
| idx = sb_skip_white (idx, in); |
| |
| if (idx < in->len) |
| { |
| if (in->len > idx + 2 && in->ptr[idx + 1] == '\'' && ISBASE (in->ptr[idx])) |
| { |
| while (!ISSEP (in->ptr[idx])) |
| sb_add_char (out, in->ptr[idx++]); |
| } |
| else if (in->ptr[idx] == '%' |
| && macro_alternate |
| && expand) |
| { |
| int val; |
| char buf[20]; |
| /* Turns the next expression into a string. */ |
| /* xgettext: no-c-format */ |
| idx = (*macro_expr) (_("% operator needs absolute expression"), |
| idx + 1, |
| in, |
| &val); |
| sprintf (buf, "%d", val); |
| sb_add_string (out, buf); |
| } |
| else if (in->ptr[idx] == '"' |
| || (in->ptr[idx] == '<' && (macro_alternate || macro_mri)) |
| || (macro_alternate && in->ptr[idx] == '\'')) |
| { |
| if (macro_alternate |
| && ! macro_strip_at |
| && expand) |
| { |
| /* Keep the quotes. */ |
| sb_add_char (out, '\"'); |
| |
| idx = getstring (idx, in, out); |
| sb_add_char (out, '\"'); |
| } |
| else |
| { |
| idx = getstring (idx, in, out); |
| } |
| } |
| else |
| { |
| while (idx < in->len |
| && (in->ptr[idx] == '"' |
| || in->ptr[idx] == '\'' |
| || pretend_quoted |
| || (in->ptr[idx] != ' ' |
| && in->ptr[idx] != '\t' |
| && in->ptr[idx] != ',' |
| && (in->ptr[idx] != '<' |
| || (! macro_alternate && ! macro_mri))))) |
| { |
| if (in->ptr[idx] == '"' |
| || in->ptr[idx] == '\'') |
| { |
| char tchar = in->ptr[idx]; |
| sb_add_char (out, in->ptr[idx++]); |
| while (idx < in->len |
| && in->ptr[idx] != tchar) |
| sb_add_char (out, in->ptr[idx++]); |
| if (idx == in->len) |
| return idx; |
| } |
| sb_add_char (out, in->ptr[idx++]); |
| } |
| } |
| } |
| |
| return idx; |
| } |
| |
| /* Pick up the formal parameters of a macro definition. */ |
| |
| static int |
| do_formals (macro_entry *macro, int idx, sb *in) |
| { |
| formal_entry **p = ¯o->formals; |
| |
| macro->formal_count = 0; |
| macro->formal_hash = hash_new (); |
| while (idx < in->len) |
| { |
| formal_entry *formal; |
| |
| formal = (formal_entry *) xmalloc (sizeof (formal_entry)); |
| |
| sb_new (&formal->name); |
| sb_new (&formal->def); |
| sb_new (&formal->actual); |
| |
| idx = sb_skip_white (idx, in); |
| idx = get_token (idx, in, &formal->name); |
| if (formal->name.len == 0) |
| break; |
| idx = sb_skip_white (idx, in); |
| if (formal->name.len) |
| { |
| /* This is a formal. */ |
| if (idx < in->len && in->ptr[idx] == '=') |
| { |
| /* Got a default. */ |
| idx = get_any_string (idx + 1, in, &formal->def, 1, 0); |
| } |
| } |
| |
| /* Add to macro's hash table. */ |
| hash_jam (macro->formal_hash, sb_terminate (&formal->name), formal); |
| |
| formal->index = macro->formal_count; |
| idx = sb_skip_comma (idx, in); |
| macro->formal_count++; |
| *p = formal; |
| p = &formal->next; |
| *p = NULL; |
| } |
| |
| if (macro_mri) |
| { |
| formal_entry *formal; |
| const char *name; |
| |
| /* Add a special NARG formal, which macro_expand will set to the |
| number of arguments. */ |
| formal = (formal_entry *) xmalloc (sizeof (formal_entry)); |
| |
| sb_new (&formal->name); |
| sb_new (&formal->def); |
| sb_new (&formal->actual); |
| |
| /* The same MRI assemblers which treat '@' characters also use |
| the name $NARG. At least until we find an exception. */ |
| if (macro_strip_at) |
| name = "$NARG"; |
| else |
| name = "NARG"; |
| |
| sb_add_string (&formal->name, name); |
| |
| /* Add to macro's hash table. */ |
| hash_jam (macro->formal_hash, name, formal); |
| |
| formal->index = NARG_INDEX; |
| *p = formal; |
| formal->next = NULL; |
| } |
| |
| return idx; |
| } |
| |
| /* Define a new macro. Returns NULL on success, otherwise returns an |
| error message. If NAMEP is not NULL, *NAMEP is set to the name of |
| the macro which was defined. */ |
| |
| const char * |
| define_macro (int idx, sb *in, sb *label, |
| int (*get_line) (sb *), const char **namep) |
| { |
| macro_entry *macro; |
| sb name; |
| const char *namestr; |
| |
| macro = (macro_entry *) xmalloc (sizeof (macro_entry)); |
| sb_new (¯o->sub); |
| sb_new (&name); |
| |
| macro->formal_count = 0; |
| macro->formals = 0; |
| |
| idx = sb_skip_white (idx, in); |
| if (! buffer_and_nest ("MACRO", "ENDM", ¯o->sub, get_line)) |
| return _("unexpected end of file in macro definition"); |
| if (label != NULL && label->len != 0) |
| { |
| sb_add_sb (&name, label); |
| 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"); |
| } |
| else |
| { |
| /* It's the label: MACRO formals,... sort */ |
| idx = do_formals (macro, idx, in); |
| } |
| } |
| else |
| { |
| 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 (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 (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, '&'); |
| sb_add_sb (out, t); |
| } |
| 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 (sb *in, sb *out, formal_entry *formals, |
| struct hash_control *formal_hash, 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] == '(') |
| { |
| /* 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') |
| { |
| 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, IS_ELF ? ".LL%04x" : "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 (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 (int idx, sb *in, macro_entry *m, sb *out) |
| { |
| 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) |
| { |
| 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, 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. Return 1 if a macro is found, 0 otherwise. */ |
| |
| int |
| check_macro (const char *line, sb *expand, |
| 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); |
| |
| sb_kill (&line_sb); |
| |
| /* Export the macro information if requested. */ |
| if (info) |
| *info = macro; |
| |
| return 1; |
| } |
| |
| /* Delete a macro. */ |
| |
| void |
| delete_macro (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 (int irpc, int idx, sb *in, sb *out, int (*get_line) (sb *)) |
| { |
| 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) |
| { |
| /* Expand once with a null string. */ |
| err = macro_expand_body (&sub, out, &f, h, 0); |
| if (err != NULL) |
| return err; |
| } |
| else |
| { |
| if (irpc && in->ptr[idx] == '"') |
| ++idx; |
| while (idx < in->len) |
| { |
| 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) |
| { |
| idx = nxt; |
| break; |
| } |
| } |
| sb_reset (&f.actual); |
| sb_add_char (&f.actual, in->ptr[idx]); |
| ++idx; |
| } |
| err = macro_expand_body (&sub, out, &f, h, 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; |
| } |