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/* l_pre.c - prerequisites list structure.
This is free and unencumbered software released into the public domain.
For more information, please refer to <http://unlicense.org>. */
#include "defs.h"
#include <stdbool.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "debug.h"
#include "l_list.h"
#include "l_pre.h"
void
prerequisite_entry_clear
(
struct prerequisite_entry_t
*self
)
{
list_entry_clear
(&self
->list_entry
);
self
->prerequisite
= NULL
;
}
void
prerequisite_entry_free
(
struct prerequisite_entry_t
*self
)
{
list_entry_free
(&self
->list_entry
);
if (self
->prerequisite
)
free (self
->prerequisite
);
prerequisite_entry_clear
(self
);
}
void
prerequisites_clear
(
struct prerequisites_t
*self
)
{
list_clear
(&self
->list
);
}
bool
prerequisites_add
(
struct prerequisites_t
*self
,
const char *prerequisite
,
struct prerequisite_entry_t
**result
)
{
bool ok
;
struct prerequisite_entry_t
*p
;
char *p_prerequisite
;
#if DEBUG == 1
unsigned i
;
#endif // DEBUG == 1
ok
= false;
p
= (struct prerequisite_entry_t
*) NULL
;
p_prerequisite
= (char *) NULL
;
if (!self
|| !prerequisite
)
{
_DBG
("Bad arguments.");
goto _local_exit
;
}
p
= malloc (sizeof (struct prerequisite_entry_t
));
if (!p
)
{
_perror
("malloc");
goto _local_exit
;
}
p_prerequisite
= strdup
(prerequisite
);
if (!p_prerequisite
)
{
_perror
("strdup");
goto _local_exit
;
}
p
->list_entry.
next = NULL
;
p
->prerequisite
= p_prerequisite
;
#if DEBUG == 1
i
= self
->list.
count;
#endif // DEBUG == 1
list_add_entry
((struct list_t
*) self
, (struct list_entry_t
*) p
);
_DBG_
("Added new prerequisite #%u: '%s'", i
, p
->prerequisite
);
ok
= true;
_local_exit
:
if (!ok
)
{
if (p
)
{
free (p
);
p
= (struct prerequisite_entry_t
*) NULL
;
}
if (p_prerequisite
)
free (p_prerequisite
);
}
if (result
)
*result
= p
;
return !ok
;
}
bool
prerequisites_print
(
struct prerequisites_t
*self
,
FILE
*stream
)
{
const struct prerequisite_entry_t
*p
;
bool padding
;
if (!self
|| !stream
)
{
_DBG
("Bad arguments.");
return true;
}
padding
= false;
for (p
= (struct prerequisite_entry_t
*) self
->list.
first; p
;
p
= (struct prerequisite_entry_t
*) p
->list_entry.
next)
{
if (fprintf (stream
, padding
? " %s" : "%s", p
->prerequisite
) < 0)
{
_perror
("fprintf");
return true;
}
padding
= true;
}
return false;
}
void
prerequisites_free
(
struct prerequisites_t
*self
)
{
struct prerequisite_entry_t
*p
, *n
;
p
= (struct prerequisite_entry_t
*) self
->list.
first;
while (p
)
{
n
= (struct prerequisite_entry_t
*) p
->list_entry.
next;
prerequisite_entry_free
(p
);
free (p
);
p
= n
;
}
prerequisites_clear
(self
);
}