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Diffstat (limited to 'contrib/binutils/gas/macro.c')
| -rw-r--r-- | contrib/binutils/gas/macro.c | 1177 |
1 files changed, 1177 insertions, 0 deletions
diff --git a/contrib/binutils/gas/macro.c b/contrib/binutils/gas/macro.c new file mode 100644 index 0000000..0991744 --- /dev/null +++ b/contrib/binutils/gas/macro.c @@ -0,0 +1,1177 @@ +/* macro.c - macro support for gas + Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 + 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 "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 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, "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; +} |
