util.h

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/*
 *  util.h
 *
 *  Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 *  Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
 *  Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
 *  Copyright (c) 2006 by David Kimpe <dnaku@frugalware.org>
 *  Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.org>
 *
 *  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 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 _ALPM_UTIL_H
#define _ALPM_UTIL_H

#include "alpm_list.h"
#include "alpm.h"
#include "package.h" /* alpm_pkg_t */
#include "handle.h" /* alpm_handle_t */

#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stddef.h> /* size_t */
#include <sys/types.h>
#include <sys/stat.h> /* struct stat */
#include <math.h> /* fabs */
#include <float.h> /* DBL_EPSILON */
#include <fcntl.h> /* open, close */

#include <archive.h> /* struct archive */

#ifdef ENABLE_NLS
#include <libintl.h> /* here so it doesn't need to be included elsewhere */
/* define _() as shortcut for gettext() */
#define _(str) dgettext ("libalpm", str)
#else
#define _(s) s
#endif

#define ALLOC_FAIL(s) do { fprintf(stderr, "alloc failure: could not allocate %zd bytes\n", s); } while(0)

#define MALLOC(p, s, action) do { p = malloc(s); if(p == NULL) { ALLOC_FAIL(s); action; } } while(0)
#define CALLOC(p, l, s, action) do { p = calloc(l, s); if(p == NULL) { ALLOC_FAIL(l * s); action; } } while(0)
/* This strdup macro is NULL safe- copying NULL will yield NULL */
#define STRDUP(r, s, action) do { if(s != NULL) { r = strdup(s); if(r == NULL) { ALLOC_FAIL(strlen(s)); action; } } else { r = NULL; } } while(0)
#define STRNDUP(r, s, l, action) do { if(s != NULL) { r = strndup(s, l); if(r == NULL) { ALLOC_FAIL(strlen(s)); action; } } else { r = NULL; } } while(0)

#define FREE(p) do { free(p); p = NULL; } while(0)

#define ASSERT(cond, action) do { if(!(cond)) { action; } } while(0)

#define RET_ERR_VOID(handle, err) do { \
    _alpm_log(handle, ALPM_LOG_DEBUG, "returning error %d from %s : %s\n", err, __func__, alpm_strerror(err)); \
    (handle)->pm_errno = (err); \
    return; } while(0)

#define RET_ERR(handle, err, ret) do { \
    _alpm_log(handle, ALPM_LOG_DEBUG, "returning error %d from %s : %s\n", err, __func__, alpm_strerror(err)); \
    (handle)->pm_errno = (err); \
    return (ret); } while(0)

#define DOUBLE_EQ(x, y) (fabs((x) - (y)) < DBL_EPSILON)

#define CHECK_HANDLE(handle, action) do { if(!(handle)) { action; } (handle)->pm_errno = 0; } while(0)

/** Standard buffer size used throughout the library. */
#ifdef BUFSIZ
#define ALPM_BUFFER_SIZE BUFSIZ
#else
#define ALPM_BUFFER_SIZE 8192
#endif

#ifndef O_BINARY
#define O_BINARY 0
#endif

#define OPEN(fd, path, flags) do { fd = open(path, flags | O_BINARY); } while(fd == -1 && errno == EINTR)
#define CLOSE(fd) do { int ret; do { ret = close(fd); } while(ret == -1 && errno == EINTR); } while(0)

/**
 * Used as a buffer/state holder for _alpm_archive_fgets().
 */
struct archive_read_buffer {
    char *line;
    char *line_offset;
    size_t line_size;
    size_t max_line_size;

    char *block;
    char *block_offset;
    size_t block_size;

    int ret;
};

enum _alpm_csum {
    ALPM_CSUM_MD5,
    ALPM_CSUM_SHA256,
};

int _alpm_makepath(const char *path);
int _alpm_makepath_mode(const char *path, mode_t mode);
int _alpm_copyfile(const char *src, const char *dest);
size_t _alpm_strip_newline(char *str);

int _alpm_open_archive(alpm_handle_t *handle, const char *path,
        struct stat *buf, struct archive **archive, alpm_errno_t error);
int _alpm_unpack_single(alpm_handle_t *handle, const char *archive,
        const char *prefix, const char *filename);
int _alpm_unpack(alpm_handle_t *handle, const char *archive, const char *prefix,
        alpm_list_t *list, int breakfirst);
int _alpm_rmrf(const char *path);
ssize_t _alpm_files_in_directory(alpm_handle_t *handle, const char *path, int full_count);
int _alpm_logaction(alpm_handle_t *handle, const char *fmt, va_list args);
int _alpm_run_chroot(alpm_handle_t *handle, const char *cmd, char *const argv[]);
int _alpm_ldconfig(alpm_handle_t *handle);
int _alpm_str_cmp(const void *s1, const void *s2);
char *_alpm_filecache_find(alpm_handle_t *handle, const char *filename);
const char *_alpm_filecache_setup(alpm_handle_t *handle);
int _alpm_lstat(const char *path, struct stat *buf);
int _alpm_test_checksum(const char *filepath, const char *expected, enum _alpm_csum type);
int _alpm_archive_fgets(struct archive *a, struct archive_read_buffer *b);
int _alpm_splitname(const char *target, char **name, char **version,
        unsigned long *name_hash);
unsigned long _alpm_hash_sdbm(const char *str);
off_t _alpm_strtoofft(const char *line);
alpm_time_t _alpm_parsedate(const char *line);
int _alpm_raw_cmp(const char *first, const char *second);
int _alpm_raw_ncmp(const char *first, const char *second, size_t max);
int _alpm_access(alpm_handle_t *handle, const char *dir, const char *file, int amode);
int _alpm_fnmatch(const void *pattern, const void *string);

#ifndef HAVE_STRSEP
char *strsep(char **, const char *);
#endif

#ifndef HAVE_STRNDUP
char *strndup(const char *s, size_t n);
#endif

/* check exported library symbols with: nm -C -D <lib> */
#define SYMEXPORT __attribute__((visibility("default")))
#define SYMHIDDEN __attribute__((visibility("internal")))

#define UNUSED __attribute__((unused))

#endif /* _ALPM_UTIL_H */

/* vim: set ts=2 sw=2 noet: */