util.h

/*
 * Copyright 2009 Red Hat Inc., Durham, North Carolina.
 * All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Authors:
 *      Lukas Kuklinek <lkuklinek@redhat.com>
 */


#ifndef OSCAP_UTIL_H_
#define OSCAP_UTIL_H_

#include <stdbool.h>
#include <assert.h>
#include "public/oscap.h"
#include "alloc.h"
#include <stdarg.h>
#include <string.h>

#ifndef __attribute__nonnull__
#define __attribute__nonnull__(x) assert((x) != NULL)
#endif

/*
 * Start a list of declarations that should not be available from outside the
 * library.  Must be matched with OSCAP_HIDDEN_END.
 */
#ifndef OSCAP_HIDDEN_START
#define OSCAP_HIDDEN_START _Pragma("GCC visibility push(hidden)")
#endif

/*
 * Start a list of declarations that should not be available from outside the
 * library started by OSCAP_HIDDEN_END.
 */
#ifndef OSCAP_HIDDEN_END
#define OSCAP_HIDDEN_END _Pragma("GCC visibility pop")
#endif

OSCAP_HIDDEN_START

typedef void (*oscap_destruct_func) (void *);

typedef void* (*oscap_clone_func) (void *);

typedef void (*oscap_consumer_func) (void *, void *);

#define OSCAP_GENERIC_GETTER_CONV(RTYPE,CONV,SNAME,MNAME,MEXP) \
        RTYPE SNAME##_get_##MNAME(const struct SNAME* item) { return (CONV(item->MEXP)); }

#define OSCAP_GENERIC_GETTER(RTYPE,SNAME,MNAME,MEXP) \
        OSCAP_GENERIC_GETTER_CONV(RTYPE,,SNAME,MNAME,MEXP)

#define OSCAP_GENERIC_GETTER_FORCE(RTYPE,SNAME,MNAME,MEXP) \
        OSCAP_GENERIC_GETTER_CONV(RTYPE,(RTYPE),SNAME,MNAME,MEXP)

#define OSCAP_GETTER_FORCE(RTYPE,SNAME,MNAME) \
        OSCAP_GENERIC_GETTER_FORCE(RTYPE,SNAME,MNAME,MNAME)

#define OSCAP_GETTER(RTYPE,SNAME,MNAME) \
        OSCAP_GENERIC_GETTER(RTYPE,SNAME,MNAME,MNAME)

#define ITERATOR_CAST(x) ((struct oscap_iterator*)(x))
#define OSCAP_ITERATOR(n) struct n##_iterator*
#define OSCAP_ITERATOR_FWD(n) struct n##_iterator;
#define OSCAP_ITERATOR_HAS_MORE(n) bool n##_iterator_has_more(OSCAP_ITERATOR(n) it) { return oscap_iterator_has_more(ITERATOR_CAST(it)); }
#define OSCAP_ITERATOR_NEXT(t,n) t n##_iterator_next(OSCAP_ITERATOR(n) it) { return oscap_iterator_next(ITERATOR_CAST(it)); }
#define OSCAP_ITERATOR_FREE(n) void n##_iterator_free(OSCAP_ITERATOR(n) it) { oscap_iterator_free(ITERATOR_CAST(it)); }
#define OSCAP_ITERATOR_RESET(n) void n##_iterator_reset(OSCAP_ITERATOR(n) it) { oscap_iterator_reset(ITERATOR_CAST(it)); }
#define OSCAP_ITERATOR_DETACH(t,n) t n##_iterator_detach(OSCAP_ITERATOR(n) it) { return oscap_iterator_detach(ITERATOR_CAST(it)); }
#define OSCAP_ITERATOR_GEN_T(t,n) OSCAP_ITERATOR_FWD(n) OSCAP_ITERATOR_HAS_MORE(n) OSCAP_ITERATOR_RESET(n) OSCAP_ITERATOR_NEXT(t,n) OSCAP_ITERATOR_FREE(n)
#define OSCAP_ITERATOR_GEN(n) OSCAP_ITERATOR_GEN_T(struct n*,n)

#define OSCAP_ITERATOR_REMOVE_T(t,n,destructor) \
                void n##_iterator_remove(OSCAP_ITERATOR(n) it) { destructor(oscap_iterator_detach(ITERATOR_CAST(it))); }
#define OSCAP_ITERATOR_REMOVE(n,destructor) OSCAP_ITERATOR_REMOVE_T(struct n*,n,destructor)
#define OSCAP_ITERATOR_REMOVE_F(n) OSCAP_ITERATOR_REMOVE(n, n##_free)


#define OSCAP_IGETTER_CONV(ITYPE,SNAME,MNAME,CONV) \
        struct ITYPE##_iterator* SNAME##_get_##MNAME(const struct SNAME* item) \
        { return oscap_iterator_new((CONV(item))->MNAME); }

#define OSCAP_IGETTER(ITYPE,SNAME,MNAME) OSCAP_IGETTER_CONV(ITYPE,SNAME,MNAME,)

#define OSCAP_IGETTER_GEN(ITYPE,SNAME,MNAME) OSCAP_IGETTER(ITYPE,SNAME,MNAME) OSCAP_ITERATOR_GEN(ITYPE)

#define OSCAP_HGETTER_EXP(RTYPE,SNAME,MNAME,MEXP) \
        RTYPE SNAME##_get_##MNAME(const struct SNAME* item, const char* key) \
        { return oscap_htable_get(item->MEXP, key); }

#define OSCAP_HGETTER(RTYPE,SNAME,MNAME) OSCAP_HGETTER_EXP(RTYPE,SNAME,MNAME,MNAME)

#define OSCAP_HGETTER_STRUCT(RTYPE,SNAME,MNAME) OSCAP_HGETTER_EXP(struct RTYPE*,SNAME,MNAME,MNAME)

#define OSCAP_SETTER_HEADER(SNAME, MTYPE, MNAME) bool SNAME##_set_##MNAME(struct SNAME *obj, MTYPE newval)

#define OSCAP_SETTER_GENERIC_CHECK(SNAME, MTYPE, MNAME, CHECK, DELETER, ASSIGNER) \
        OSCAP_SETTER_HEADER(SNAME, MTYPE, MNAME) \
        { if (!(CHECK)) return false; DELETER(obj->MNAME); obj->MNAME = ASSIGNER(newval); return true; }

#define OSCAP_SETTER_GENERIC(SNAME, MTYPE, MNAME, DELETER, ASSIGNER) \
        OSCAP_SETTER_HEADER(SNAME, MTYPE, MNAME) \
        { DELETER(obj->MNAME); obj->MNAME = ASSIGNER(newval); return true; }

#define OSCAP_SETTER_GENERIC_NODELETE(SNAME, MTYPE, MNAME, ASSIGNER) \
        OSCAP_SETTER_HEADER(SNAME, MTYPE, MNAME) \
        { obj->MNAME = ASSIGNER(newval); return true; }

#define OSCAP_SETTER_SIMPLE(SNAME, MTYPE, MNAME) \
        OSCAP_SETTER_GENERIC_NODELETE(SNAME, MTYPE, MNAME, )

#define OSCAP_SETTER_STRING(SNAME, MNAME) \
        OSCAP_SETTER_GENERIC(SNAME, const char *, MNAME, free, oscap_strdup)

#define OSCAP_ACCESSOR_STRING(SNAME, MNAME) \
        OSCAP_GETTER(const char*, SNAME, MNAME) OSCAP_SETTER_STRING(SNAME, MNAME)

#define OSCAP_ACCESSOR_TEXT(SNAME, MNAME) \
        OSCAP_GETTER(struct oscap_text *, SNAME, MNAME) \
    OSCAP_SETTER_GENERIC(SNAME, struct oscap_text*, MNAME, oscap_text_free, )

#define OSCAP_ACCESSOR_SIMPLE(MTYPE, SNAME, MNAME) \
        OSCAP_GETTER(MTYPE, SNAME, MNAME) OSCAP_SETTER_SIMPLE(SNAME, MTYPE, MNAME)

#define OSCAP_ACCESSOR_EXP(MTYPE, SNAME, MNAME, MEXP) \
    OSCAP_GENERIC_GETTER(MTYPE, SNAME, MNAME, MEXP) \
    OSCAP_SETTER_HEADER(SNAME, MTYPE, MNAME) { obj->MEXP = newval; return true; }

#define OSCAP_INSERTER(SNAME, FNAME, MTYPE, MNAME) \
        bool SNAME##_add_##FNAME(struct SNAME *obj, struct MTYPE *item) \
        { oscap_list_add(obj->MNAME, item); return true; }

/* Generate iterator getter and list inserter */
#define OSCAP_IGETINS(ITYPE, SNAME, MNAME, FNAME) \
        OSCAP_IGETTER(ITYPE, SNAME, MNAME) OSCAP_INSERTER(SNAME, FNAME, ITYPE, MNAME)
/* Generate iterator getter, list inserter, and iterator manipulation functions. */
#define OSCAP_IGETINS_GEN(ITYPE, SNAME, MNAME, FNAME) \
        OSCAP_IGETTER_GEN(ITYPE, SNAME, MNAME) OSCAP_INSERTER(SNAME, FNAME, ITYPE, MNAME)

struct oscap_string_map {
        const int value;    /* integer/enum value */
        const char *string; /* string representation of the value */
};

int oscap_string_to_enum(const struct oscap_string_map *map, const char *str);

const char *oscap_enum_to_string(const struct oscap_string_map *map, int val);

static inline char *oscap_strdup(const char *str) {
        if (str == NULL)
                return NULL;

#ifdef _MSC_VER
        return _strdup(str);
#else
        return strdup(str);
#endif
}

char **oscap_split(char *str, const char *delim);


static inline int oscap_strcmp(const char *s1, const char *s2) {
        if (s1 == NULL) s1 = "";
        if (s2 == NULL) s2 = "";
        return strcmp(s1, s2);
}

static inline bool oscap_streq(const char *s1, const char *s2) {
        return oscap_strcmp(s1, s2) == 0;
}

static inline bool oscap_str_startswith(const char *str, const char *prefix) {
        return strncmp(str, prefix, strlen(prefix)) == 0;
}

static inline bool oscap_str_endswith(const char *str, const char *suffix) {
        const size_t str_len = strlen(str);
        const size_t suffix_len = strlen(suffix);
        if (suffix_len > str_len)
                return false;
        return strncmp(str + str_len - suffix_len, suffix, suffix_len) == 0;
}
char *oscap_trim(char *str);
char *oscap_vsprintf(const char *fmt, va_list ap);

// FIXME: This is there because of the SCE engine using this particular function
OSCAP_HIDDEN_END;

char *oscap_sprintf(const char *fmt, ...);

OSCAP_HIDDEN_START;

const char *oscap_strlist_find_value(char ** const kvalues, const char *key);
char *oscap_rtrim(char *str, char ch);
void oscap_strtoupper(char *str);

// check pointer equality
bool oscap_ptr_cmp(void *node1, void *node2);

char *oscap_expand_ipv6(const char *input);

#ifndef OSCAP_CONCAT
# define OSCAP_CONCAT1(a,b) a ## b
# define OSCAP_CONCAT(a,b) OSCAP_CONCAT1(a,b)
#endif

#define OSCAP_GSYM(s) OSCAP_CONCAT(___G_, s)

#define protect_errno                                                   \
        for (int OSCAP_CONCAT(__e,__LINE__)=errno, OSCAP_CONCAT(__s,__LINE__)=1; OSCAP_CONCAT(__s,__LINE__)--; errno=OSCAP_CONCAT(__e,__LINE__))

OSCAP_HIDDEN_END;

#endif                          /* OSCAP_UTIL_H_ */