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/* Target file management for GNU Make.
Copyright (C) 1988-2014 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 3 of the License, 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
this program. If not, see <http://www.gnu.org/licenses/>. */
#include "makeint.h"
#include <assert.h>
#include "filedef.h"
#include "file.h"
#include "dep.h"
#include "job.h"
#include "commands.h"
#include "variable.h"
#include "debug.h"
#include "hash.h"
struct hash_table files;
extern unsigned long
file_hash_1 (const void *key)
{
return_ISTRING_HASH_1 (((struct file const *) key)->hname);
}
extern unsigned long
file_hash_2 (const void *key)
{
return_ISTRING_HASH_2 (((struct file const *) key)->hname);
}
extern int
file_hash_cmp (const void *x, const void *y)
{
return_ISTRING_COMPARE (((struct file const *) x)->hname,
((struct file const *) y)->hname);
}
#ifndef FILE_BUCKETS
#define FILE_BUCKETS 1007
#endif
/* Access the hash table of all file records.
lookup_file given a name, return the struct file * for that name,
or nil if there is none.
*/
struct file *
lookup_file (const char *name)
{
struct file *f;
struct file file_key;
#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)
char *lname;
#endif
assert (*name != '\0');
/* This is also done in parse_file_seq, so this is redundant
for names read from makefiles. It is here for names passed
on the command line. */
#ifdef VMS
# ifndef WANT_CASE_SENSITIVE_TARGETS
if (*name != '.')
{
const char *n;
char *ln;
lname = xstrdup (name);
for (n = name, ln = lname; *n != '\0'; ++n, ++ln)
*ln = isupper ((unsigned char)*n) ? tolower ((unsigned char)*n) : *n;
*ln = '\0';
name = lname;
}
# endif
while (name[0] == '[' && name[1] == ']' && name[2] != '\0')
name += 2;
#endif
while (name[0] == '.'
#ifdef HAVE_DOS_PATHS
&& (name[1] == '/' || name[1] == '\\')
#else
&& name[1] == '/'
#endif
&& name[2] != '\0')
{
name += 2;
while (*name == '/'
#ifdef HAVE_DOS_PATHS
|| *name == '\\'
#endif
)
/* Skip following slashes: ".//foo" is "foo", not "/foo". */
++name;
}
if (*name == '\0')
/* It was all slashes after a dot. */
#if defined(VMS)
name = "[]";
#elif defined(_AMIGA)
name = "";
#else
name = "./";
#endif
file_key.hname = name;
f = hash_find_item (&files, &file_key);
#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)
if (*name != '.')
free (lname);
#endif
return f;
}
struct file *
enter_file (const char *name)
{
struct file *f;
struct file *new;
struct file **file_slot;
struct file file_key;
assert (*name != '\0');
assert (! verify_flag || strcache_iscached (name));
#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)
if (*name != '.')
{
const char *n;
char *lname, *ln;
lname = xstrdup (name);
for (n = name, ln = lname; *n != '\0'; ++n, ++ln)
if (isupper ((unsigned char)*n))
*ln = tolower ((unsigned char)*n);
else
*ln = *n;
*ln = '\0';
name = strcache_add (lname);
free (lname);
}
#endif
file_key.hname = name;
file_slot = (struct file **) hash_find_slot (&files, &file_key);
f = *file_slot;
if (! HASH_VACANT (f) && !f->double_colon)
{
f->builtin = 0;
return f;
}
new = xcalloc (sizeof (struct file));
new->name = new->hname = name;
new->update_status = us_none;
if (HASH_VACANT (f))
{
new->last = new;
hash_insert_at (&files, new, file_slot);
}
else
{
/* There is already a double-colon entry for this file. */
new->double_colon = f;
f->last->prev = new;
f->last = new;
}
return new;
}
void
init_hash_files (void)
{
hash_init (&files, 1000, file_hash_1, file_hash_2, file_hash_cmp);
}
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