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# lib.h: declarations for common, low-level routines in kpathsea.
#
# Copyright (C) 1992, 1993, 1994, 1995, 1996, 2000, 2011
# 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 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.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#ifndef KPATHSEA_LIB_H
#define KPATHSEA_LIB_H
#include "types.h"
/* Define common sorts of messages. */
/* This should be called only after a system call fails. Don't exit
with status `errno', because that might be 256, which would mean
success (exit statuses are truncated to eight bits). */
#define FATAL_PERROR(str) do { \
fprintf (stderr, "%s: ", program_invocation_name); \
perror (str); exit (EXIT_FAILURE); } while (0)
#define START_FATAL() do { \
fprintf (stderr, "%s: fatal: ", program_invocation_name);
#define END_FATAL() fputs (".\n", stderr); exit (1); } while (0)
#define FATAL(str) \
START_FATAL (); fputs (str, stderr); END_FATAL ()
#define FATAL1(str, e1) \
START_FATAL (); fprintf (stderr, str, e1); END_FATAL ()
#define FATAL2(str, e1, e2) \
START_FATAL (); fprintf (stderr, str, e1, e2); END_FATAL ()
#define FATAL3(str, e1, e2, e3) \
START_FATAL (); fprintf (stderr, str, e1, e2, e3); END_FATAL ()
#define FATAL4(str, e1, e2, e3, e4) \
START_FATAL (); fprintf (stderr, str, e1, e2, e3, e4); END_FATAL ()
#define FATAL5(str, e1, e2, e3, e4, e5) \
START_FATAL (); fprintf (stderr, str, e1, e2, e3, e4, e5); END_FATAL ()
#define FATAL6(str, e1, e2, e3, e4, e5, e6) \
START_FATAL (); fprintf (stderr, str, e1, e2, e3, e4, e5, e6); END_FATAL ()
#define START_WARNING() do { fputs ("warning: ", stderr)
#define END_WARNING() fputs (".\n", stderr); fflush (stderr); } while (0)
#define WARNING(str) \
START_WARNING (); fputs (str, stderr); END_WARNING ()
#define WARNING1(str, e1) \
START_WARNING (); fprintf (stderr, str, e1); END_WARNING ()
#define WARNING2(str, e1, e2) \
START_WARNING (); fprintf (stderr, str, e1, e2); END_WARNING ()
#define WARNING3(str, e1, e2, e3) \
START_WARNING (); fprintf (stderr, str, e1, e2, e3); END_WARNING ()
#define WARNING4(str, e1, e2, e3, e4) \
START_WARNING (); fprintf (stderr, str, e1, e2, e3, e4); END_WARNING ()
/* I find this easier to read. */
#define STREQ(s1, s2) ((s1) && (s2) && (strcmp (s1, s2) == 0))
#define STRNEQ(s1, s2, n) ((s1) && (s2) && (strncmp (s1, s2, n) == 0))
/* Support for FAT/ISO-9660 filesystems. Theoretically this should be
done at runtime, per filesystem, but that's painful to program. */
#ifdef MONOCASE_FILENAMES
#define FILESTRCASEEQ(s1, s2) ((s1) && (s2) && (strcasecmp (s1, s2) == 0))
#define FILESTRNCASEEQ(s1, s2, l) ((s1) && (s2) && (strncasecmp (s1, s2, l) == 0))
#define FILECHARCASEEQ(c1, c2) (toupper (c1) == toupper (c2))
#else
#define FILESTRCASEEQ STREQ
#define FILESTRNCASEEQ STRNEQ
#define FILECHARCASEEQ(c1, c2) ((c1) == (c2))
#endif
/* This is the maximum number of numerals that result when a 64-bit
integer is converted to a string, plus one for a trailing null byte,
plus one for a sign. */
#define MAX_INT_LENGTH 21
/* If the environment variable TEST is set, return it; otherwise,
DEFAULT. This is useful for paths that use more than one envvar. */
#define ENVVAR(test, default) (getenv (test) ? (test) : (default))
/* Return a fresh copy of S1 followed by S2, et al. */
extern string concat P2H(const_string s1, const_string s2);
extern string concat3 P3H(const_string, const_string, const_string);
/* `concatn' is declared in its own include file, to avoid pulling in
all the varargs stuff. */
/* A fresh copy of just S. */
extern string xstrdup P1H(const_string s);
/* Convert all lowercase characters in S to uppercase. */
extern string uppercasify P1H(const_string s);
/* Like `atoi', but disallow negative numbers. */
extern unsigned atou P1H(const_string);
/* True if FILENAME1 and FILENAME2 are the same file. If stat fails on
either name, return false, no error message.
Cf. `SAME_FILE_P' in xstat.h. */
extern boolean same_file_p P2H(const_string filename1,
const_string filename2);
/* Return NAME with any leading path stripped off. This returns a
pointer into NAME. */
extern const_string xbasename P1H(const_string name);
/* Return directory part of NAME. This returns a new string. */
extern string xdirname P1H(const_string name);
#ifndef HAVE_STRSTR
extern string strstr P2H(const_string haystack, const_string needle);
#endif
/* If NAME has a suffix, return a pointer to its first character (i.e.,
the one after the `.'); otherwise, return NULL. */
extern string find_suffix P1H(const_string name);
/* Return NAME with any suffix removed. */
extern string remove_suffix P1H(const_string name);
/* Return S with the suffix SUFFIX, removing any suffix already present.
For example, `make_suffix ("/foo/bar.baz", "quux")' returns
`/foo/bar.quux'. Returns a string allocated with malloc. */
extern string make_suffix P2H(const_string s, const_string suffix);
/* Return NAME with STEM_PREFIX prepended to the stem. For example,
`make_prefix ("/foo/bar.baz", "x")' returns `/foo/xbar.baz'.
Returns a string allocated with malloc. */
extern string make_prefix P2H(string stem_prefix, string name);
/* If NAME has a suffix, simply return it; otherwise, return
`NAME.SUFFIX'. */
extern string extend_filename P2H(const_string name,
const_string suffix);
/* Call putenv with the string `VAR=VALUE' and abort on error. */
extern void xputenv P2H(const_string var, const_string value);
extern void xputenv_int P2H(const_string var, int value);
/* Return the current working directory. */
extern string xgetcwd P1H(void);
/* Returns true if FN is a directory or a symlink to a directory. */
extern boolean dir_p P1H(const_string fn);
/* If FN is a readable directory, return the number of links it has.
Otherwise, return -1. The nlinks parameter is a dummy on UNIX. */
extern int dir_links P1H(const_string fn);
/* Like their stdio counterparts, but abort on error, after calling
perror(3) with FILENAME as its argument. */
extern FILE *xfopen P2H(const_string filename, const_string mode);
extern void xfclose P2H(FILE *, const_string filename);
extern void xfseek P4H(FILE *, long, int, string filename);
extern unsigned long xftell P2H(FILE *, string filename);
/* These call the corresponding function in the standard library, and
abort if those routines fail. Also, `xrealloc' calls `xmalloc' if
OLD_ADDRESS is null. */
extern address xmalloc P1H(unsigned size);
extern address xrealloc P2H(address old_address, unsigned new_size);
extern address xcalloc P2H(unsigned nelem, unsigned elsize);
/* (Re)Allocate N items of type T using xmalloc/xrealloc. */
#define XTALLOC(n, t) ((t *) xmalloc ((n) * sizeof (t)))
#define XTALLOC1(t) XTALLOC (1, t)
#define XRETALLOC(addr, n, t) ((addr) = (t *) xrealloc (addr, (n) * sizeof(t)))
#endif /* not KPATHSEA_LIB_H */
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