-/* PSPP - computes sample statistics.
+/* PSPP - a program for statistical analysis.
Copyright (C) 1997-9, 2000, 2006, 2007 Free Software Foundation, Inc.
- This program 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 of the
- License, or (at your option) any later version.
+ This program 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.
- This program 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.
+ This program 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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <ctype.h>
#include <errno.h>
+#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
+#include <unistd.h>
#include "intprops.h"
#include "minmax.h"
#include "dirname.h"
+#include "xmalloca.h"
-#include <libpspp/alloc.h>
-#include <libpspp/message.h>
#include <data/settings.h>
+#include <libpspp/hash.h>
+#include <libpspp/message.h>
#include <libpspp/str.h>
#include <libpspp/verbose-msg.h>
#include <libpspp/version.h>
+#include "xalloc.h"
+
#include "gettext.h"
#define _(msgid) gettext (msgid)
properly handling the case where SRC is a substring of DST.
Variables are as defined by GETENV. Supports $var and ${var}
syntaxes; $$ substitutes as $. */
-void
+void
fn_interp_vars (struct substring src, const char *(*getenv) (const char *),
struct string *dst_)
{
int c;
while ((c = ss_get_char (&src)) != EOF)
- if (c != '$')
+ if (c != '$')
ds_put_char (&dst, c);
else
{
else if (ss_match_char (&src, '{'))
ss_get_until (&src, '}', &var_name);
else
- ss_get_chars (&src, MIN (1, ss_span (src, ss_cstr (CC_ALNUM))),
+ ss_get_chars (&src, MAX (1, ss_span (src, ss_cstr (CC_ALNUM))),
&var_name);
start = ds_length (&dst);
ds_truncate (&dst, start);
ds_put_cstr (&dst, value);
- }
+ }
}
ds_swap (&dst, dst_);
If FILE_NAME does not have an extension, returns an empty
string. */
char *
-fn_extension (const char *file_name)
+fn_extension (const char *file_name)
{
const char *extension = strrchr (file_name, '.');
if (extension == NULL)
FILE *
fn_open (const char *fn, const char *mode)
{
- assert (mode[0] == 'r' || mode[0] == 'w');
+ assert (mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a');
- if (mode[0] == 'r' && (!strcmp (fn, "stdin") || !strcmp (fn, "-")))
+ if (mode[0] == 'r' && (!strcmp (fn, "stdin") || !strcmp (fn, "-")))
return stdin;
else if (mode[0] == 'w' && (!strcmp (fn, "stdout") || !strcmp (fn, "-")))
return stdout;
else if (mode[0] == 'w' && !strcmp (fn, "stderr"))
return stderr;
-
+
#if HAVE_POPEN
if (fn[0] == '|')
{
if (get_safer_mode ())
return safety_violation (fn);
- return popen (&fn[1], mode);
+ return popen (&fn[1], mode[0] == 'r' ? "r" : "w");
}
else if (*fn && fn[strlen (fn) - 1] == '|')
{
if (get_safer_mode ())
return safety_violation (fn);
-
- s = local_alloc (strlen (fn));
+
+ s = xmalloca (strlen (fn));
memcpy (s, fn, strlen (fn) - 1);
s[strlen (fn) - 1] = 0;
-
- f = popen (s, mode);
- local_free (s);
+ f = popen (s, mode[0] == 'r' ? "r" : "w");
+
+ freea (s);
return f;
}
int
fn_close (const char *fn, FILE *f)
{
- if (!strcmp (fn, "-"))
+ if (fileno (f) == STDIN_FILENO
+ || fileno (f) == STDOUT_FILENO
+ || fileno (f) == STDERR_FILENO)
return 0;
#if HAVE_POPEN
else if (fn[0] == '|' || (*fn && fn[strlen (fn) - 1] == '|'))
return fclose (f);
}
-#if !(defined _WIN32 || defined __WIN32__)
-/* A file's identity. */
-struct file_identity
+/* Creates a new file named FN with the given PERMISSIONS bits,
+ and returns a stream for it or a null pointer on failure.
+ MODE should be "w" or "wb". */
+FILE *
+create_stream (const char *fn, const char *mode, mode_t permissions)
{
- dev_t device; /* Device number. */
- ino_t inode; /* Inode number. */
-};
+ int fd;
+ FILE *stream;
-/* Returns a pointer to a dynamically allocated structure whose
- value can be used to tell whether two files are actually the
- same file. Returns a null pointer if no information about the
- file is available, perhaps because it does not exist. The
- caller is responsible for freeing the structure with
- fn_free_identity() when finished. */
-struct file_identity *
-fn_get_identity (const char *file_name)
-{
- struct stat s;
+ fd = open (fn, O_WRONLY | O_CREAT | O_TRUNC, permissions);
+ if (fd < 0)
+ return NULL;
- if (stat (file_name, &s) == 0)
+ stream = fdopen (fd, mode);
+ if (stream == NULL)
{
- struct file_identity *identity = xmalloc (sizeof *identity);
- identity->device = s.st_dev;
- identity->inode = s.st_ino;
- return identity;
+ int save_errno = errno;
+ close (fd);
+ errno = save_errno;
}
- else
- return NULL;
-}
-/* Frees IDENTITY obtained from fn_get_identity(). */
-void
-fn_free_identity (struct file_identity *identity)
-{
- free (identity);
+ return stream;
}
-/* Compares A and B, returning a strcmp()-type result. */
-int
-fn_compare_file_identities (const struct file_identity *a,
- const struct file_identity *b)
-{
- assert (a != NULL);
- assert (b != NULL);
- if (a->device != b->device)
- return a->device < b->device ? -1 : 1;
- else
- return a->inode < b->inode ? -1 : a->inode > b->inode;
-}
-#else /* Windows */
-/* A file's identity. */
-struct file_identity
+/* A file's identity:
+
+ - For a file that exists, this is its device and inode.
+
+ - For a file that does not exist, but which has a directory
+ name that exists, this is the device and inode of the
+ directory, plus the file's base name.
+
+ - For a file that does not exist and has a nonexistent
+ directory, this is the file name.
+
+ Windows doesn't have inode numbers, so we just use the name
+ there. */
+struct file_identity
{
- char *normalized_file_name; /* File's normalized name. */
+ dev_t device; /* Device number. */
+ ino_t inode; /* Inode number. */
+ char *name; /* File name, where needed, otherwise NULL. */
};
/* Returns a pointer to a dynamically allocated structure whose
same file. Returns a null pointer if no information about the
file is available, perhaps because it does not exist. The
caller is responsible for freeing the structure with
- fn_free_identity() when finished. */
+ fn_free_identity() when finished. */
struct file_identity *
-fn_get_identity (const char *file_name)
+fn_get_identity (const char *file_name)
{
struct file_identity *identity = xmalloc (sizeof *identity);
- char cname[PATH_MAX];
- if (GetFullPathName (file_name, sizeof cname, cname, NULL))
- identity->normalized_file_name = xstrdup (cname);
+#if !(defined _WIN32 || defined __WIN32__)
+ struct stat s;
+ if (lstat (file_name, &s) == 0)
+ {
+ identity->device = s.st_dev;
+ identity->inode = s.st_ino;
+ identity->name = NULL;
+ }
else
- identity->normalized_file_name = xstrdup (file_name);
+ {
+ char *dir = dir_name (file_name);
+ if (last_component (file_name) != NULL && stat (dir, &s) == 0)
+ {
+ identity->device = s.st_dev;
+ identity->inode = s.st_ino;
+ identity->name = base_name (file_name);
+ }
+ else
+ {
+ identity->device = 0;
+ identity->inode = 0;
+ identity->name = xstrdup (file_name);
+ }
+ free (dir);
+ }
+#else /* Windows */
+ char cname[PATH_MAX];
+ int ok = GetFullPathName (file_name, sizeof cname, cname, NULL);
+ identity->device = 0;
+ identity->inode = 0;
+ identity->name = xstrdup (ok ? cname : file_name);
+ str_lowercase (identity->file_name);
+#endif /* Windows */
return identity;
}
/* Frees IDENTITY obtained from fn_get_identity(). */
void
-fn_free_identity (struct file_identity *identity)
+fn_free_identity (struct file_identity *identity)
{
- if (identity != NULL)
+ if (identity != NULL)
{
- free (identity->normalized_file_name);
+ free (identity->name);
free (identity);
}
}
/* Compares A and B, returning a strcmp()-type result. */
int
fn_compare_file_identities (const struct file_identity *a,
- const struct file_identity *b)
+ const struct file_identity *b)
+{
+ if (a->device != b->device)
+ return a->device < b->device ? -1 : 1;
+ else if (a->inode != b->inode)
+ return a->inode < b->inode ? -1 : 1;
+ else if (a->name != NULL)
+ return b->name != NULL ? strcmp (a->name, b->name) : 1;
+ else
+ return b->name != NULL ? -1 : 0;
+}
+
+/* Returns a hash value for IDENTITY. */
+unsigned int
+fn_hash_identity (const struct file_identity *identity)
{
- return strcasecmp (a->normalized_file_name, b->normalized_file_name);
+ unsigned int hash = identity->device ^ identity->inode;
+ if (identity->name != NULL)
+ hash ^= hsh_hash_string (identity->name);
+ return hash;
}
-#endif /* Windows */
projects / pspp-builds.git / blobdiff