make/ar.c
Paul Smith f29b86c314 Many compiler warning cleanups.
Small fixes for W32 (from Jonathan Grant  <jg-make@jguk.org>)
Maintainer enhancements to clean up the tree.
2004-02-24 13:50:19 +00:00

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7.7 KiB
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/* Interface to `ar' archives for GNU Make.
Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1997,
2002 Free Software Foundation, Inc.
This file is part of GNU Make.
GNU Make 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.
GNU Make 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 GNU Make; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "make.h"
#ifndef NO_ARCHIVES
#include "filedef.h"
#include "dep.h"
#include <fnmatch.h>
/* Defined in arscan.c. */
extern long int ar_scan PARAMS ((char *archive, long int (*function) (), long int arg));
extern int ar_name_equal PARAMS ((char *name, char *mem, int truncated));
#ifndef VMS
extern int ar_member_touch PARAMS ((char *arname, char *memname));
#endif
/* Return nonzero if NAME is an archive-member reference, zero if not.
An archive-member reference is a name like `lib(member)'.
If a name like `lib((entry))' is used, a fatal error is signaled at
the attempt to use this unsupported feature. */
int
ar_name (char *name)
{
char *p = strchr (name, '(');
char *end;
if (p == 0 || p == name)
return 0;
end = p + strlen (p) - 1;
if (*end != ')')
return 0;
if (p[1] == '(' && end[-1] == ')')
fatal (NILF, _("attempt to use unsupported feature: `%s'"), name);
return 1;
}
/* Parse the archive-member reference NAME into the archive and member names.
Put the malloc'd archive name in *ARNAME_P if ARNAME_P is non-nil;
put the malloc'd member name in *MEMNAME_P if MEMNAME_P is non-nil. */
void
ar_parse_name (char *name, char **arname_p, char **memname_p)
{
char *p = strchr (name, '('), *end = name + strlen (name) - 1;
if (arname_p != 0)
*arname_p = savestring (name, p - name);
if (memname_p != 0)
*memname_p = savestring (p + 1, end - (p + 1));
}
static long int ar_member_date_1 PARAMS ((int desc, char *mem, int truncated, long int hdrpos,
long int datapos, long int size, long int date, int uid, int gid, int mode, char *name));
/* Return the modtime of NAME. */
time_t
ar_member_date (char *name)
{
char *arname;
int arname_used = 0;
char *memname;
long int val;
ar_parse_name (name, &arname, &memname);
/* Make sure we know the modtime of the archive itself because we are
likely to be called just before commands to remake a member are run,
and they will change the archive itself.
But we must be careful not to enter_file the archive itself if it does
not exist, because pattern_search assumes that files found in the data
base exist or can be made. */
{
struct file *arfile;
arfile = lookup_file (arname);
if (arfile == 0 && file_exists_p (arname))
{
arfile = enter_file (arname);
arname_used = 1;
}
if (arfile != 0)
(void) f_mtime (arfile, 0);
}
val = ar_scan (arname, ar_member_date_1, (long int) memname);
if (!arname_used)
free (arname);
free (memname);
return (val <= 0 ? (time_t) -1 : (time_t) val);
}
/* This function is called by `ar_scan' to find which member to look at. */
/* ARGSUSED */
static long int
ar_member_date_1 (int desc UNUSED, char *mem, int truncated,
long int hdrpos UNUSED, long int datapos UNUSED,
long int size UNUSED, long int date,
int uid UNUSED, int gid UNUSED, int mode UNUSED, char *name)
{
return ar_name_equal (name, mem, truncated) ? date : 0;
}
/* Set the archive-member NAME's modtime to now. */
#ifdef VMS
int
ar_touch (char *name)
{
error (NILF, _("touch archive member is not available on VMS"));
return -1;
}
#else
int
ar_touch (char *name)
{
char *arname, *memname;
int arname_used = 0;
register int val;
ar_parse_name (name, &arname, &memname);
/* Make sure we know the modtime of the archive itself before we
touch the member, since this will change the archive itself. */
{
struct file *arfile;
arfile = lookup_file (arname);
if (arfile == 0)
{
arfile = enter_file (arname);
arname_used = 1;
}
(void) f_mtime (arfile, 0);
}
val = 1;
switch (ar_member_touch (arname, memname))
{
case -1:
error (NILF, _("touch: Archive `%s' does not exist"), arname);
break;
case -2:
error (NILF, _("touch: `%s' is not a valid archive"), arname);
break;
case -3:
perror_with_name ("touch: ", arname);
break;
case 1:
error (NILF,
_("touch: Member `%s' does not exist in `%s'"), memname, arname);
break;
case 0:
val = 0;
break;
default:
error (NILF,
_("touch: Bad return code from ar_member_touch on `%s'"), name);
}
if (!arname_used)
free (arname);
free (memname);
return val;
}
#endif /* !VMS */
/* State of an `ar_glob' run, passed to `ar_glob_match'. */
struct ar_glob_state
{
char *arname;
char *pattern;
unsigned int size;
struct nameseq *chain;
unsigned int n;
};
/* This function is called by `ar_scan' to match one archive
element against the pattern in STATE. */
static long int
ar_glob_match (int desc UNUSED, char *mem, int truncated UNUSED,
long int hdrpos UNUSED, long int datapos UNUSED,
long int size UNUSED, long int date UNUSED, int uid UNUSED,
int gid UNUSED, int mode UNUSED, struct ar_glob_state *state)
{
if (fnmatch (state->pattern, mem, FNM_PATHNAME|FNM_PERIOD) == 0)
{
/* We have a match. Add it to the chain. */
struct nameseq *new = (struct nameseq *) xmalloc (state->size);
new->name = concat (state->arname, mem, ")");
new->next = state->chain;
state->chain = new;
++state->n;
}
return 0L;
}
/* Return nonzero if PATTERN contains any metacharacters.
Metacharacters can be quoted with backslashes if QUOTE is nonzero. */
static int
glob_pattern_p (const char *pattern, int quote)
{
const char *p;
int open = 0;
for (p = pattern; *p != '\0'; ++p)
switch (*p)
{
case '?':
case '*':
return 1;
case '\\':
if (quote)
++p;
break;
case '[':
open = 1;
break;
case ']':
if (open)
return 1;
break;
}
return 0;
}
/* Glob for MEMBER_PATTERN in archive ARNAME.
Return a malloc'd chain of matching elements (or nil if none). */
struct nameseq *
ar_glob (char *arname, char *member_pattern, unsigned int size)
{
struct ar_glob_state state;
char **names;
struct nameseq *n;
unsigned int i;
if (! glob_pattern_p (member_pattern, 1))
return 0;
/* Scan the archive for matches.
ar_glob_match will accumulate them in STATE.chain. */
i = strlen (arname);
state.arname = (char *) alloca (i + 2);
bcopy (arname, state.arname, i);
state.arname[i] = '(';
state.arname[i + 1] = '\0';
state.pattern = member_pattern;
state.size = size;
state.chain = 0;
state.n = 0;
(void) ar_scan (arname, ar_glob_match, (long int) &state);
if (state.chain == 0)
return 0;
/* Now put the names into a vector for sorting. */
names = (char **) alloca (state.n * sizeof (char *));
i = 0;
for (n = state.chain; n != 0; n = n->next)
names[i++] = n->name;
/* Sort them alphabetically. */
qsort ((char *) names, i, sizeof (*names), alpha_compare);
/* Put them back into the chain in the sorted order. */
i = 0;
for (n = state.chain; n != 0; n = n->next)
n->name = names[i++];
return state.chain;
}
#endif /* Not NO_ARCHIVES. */