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Samarth Joshi
key-value-store
Commits
5b79a48a
Commit
5b79a48a
authored
Nov 10, 2020
by
Samarth Joshi
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Merge branch 'master' of
https://git.cse.iitb.ac.in/samarthjoshi/key-value-store
parents
d39129da
811d30c1
Changes
1
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14 additions
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3 deletions
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-3
temp.c
temp.c
+14
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temp.c
View file @
5b79a48a
...
...
@@ -37,6 +37,9 @@ void file_del( char *key)
int
length
=
0
;
sem_wait
(
&
mutex
[
index
]);
char
blankspace
[
512
];
char
ch
;
int
k
=-
1
;
lseek
(
fds
[
index
],
0
,
SEEK_SET
);
memset
(
blankspace
,
0
,
512
);
char
*
line
;
char
temp
[
514
];
...
...
@@ -52,12 +55,13 @@ void file_del( char *key)
if
(
strcmp
(
key
,
fkey
)
==
0
){
lseek
(
fds
[
index
],
position
,
SEEK_SET
);
write
(
fds
[
index
],
blankspace
,
strlen
(
temp
));
puts
(
temp
);
break
;
}
position
=
ftell
(
fp
);
}
printf
(
"length %d"
,
length
);
sem_post
(
&
mutex
[
index
]);
}
...
...
@@ -66,7 +70,9 @@ int file_get(char *key, char *value)
/* Gets the value stored at offset */
/* Does not depend on key argument */
int
found
=
0
;
int
index
=
modulus
(
key
,
256
,
setSize
);
lseek
(
fds
[
index
],
0
,
SEEK_SET
);
sem_wait
(
&
readerLocks
[
index
]);
readCounters
[
index
]
+=
1
;
if
(
readCounters
[
index
]
==
1
)
...
...
@@ -103,6 +109,7 @@ off_t file_put(char *key,char *value)
if not present then search for empty line and insert there!
*/
unsigned
int
index
=
modulus
(
key
,
256
,
setSize
);
lseek
(
fds
[
index
],
0
,
SEEK_SET
);
off_t
position
;
//sem_wait(&mutex[index]);
printf
(
"[Write to File: %d]
\n
"
,
index
);
...
...
@@ -128,7 +135,7 @@ off_t file_put(char *key,char *value)
printf
(
"value:(%s)(%s)
\n
"
,
fvalue
,
value
);
fflush
(
stdout
);
fseek
(
fp
,
position
,
SEEK_SET
);
snprintf
(
lin
,
s
izeof
(
lin
)
,
"%s:%s
\n
"
,
key
,
value
);
snprintf
(
lin
,
s
trlen
(
key
)
+
strlen
(
value
)
+
2
,
"%s:%s
\n
"
,
key
,
value
);
if
(
fputs
(
lin
,
fp
)
<
0
)
printf
(
"
\n
[unable to perform file_put]
\n
"
);
return
0
;
...
...
@@ -183,6 +190,10 @@ int main()
//offset = file_put("40", "value28");
//file_get(prevkey, value); // Doesnot depend on key arg, returns key and value at offset 0
//printf("(%s)", value);
file_del
(
"29"
);
//file_del("29");
//file_get("24",value);
// printf("(%s)\n", value);
file_del
(
"21"
);
//printf("(%s)\n", value);
}
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