GRASS GIS 8 Programmer's Manual
8.5.0dev(2024)-adcdf28bb2
create.c
Go to the documentation of this file.
1
#include <stdio.h>
2
#include <stdlib.h>
3
#include <
grass/btree.h
>
4
5
int
btree_create
(
BTREE
*B,
int
(*cmp)(
const
void
*,
const
void
*),
int
incr)
6
{
7
if
(incr <= 0)
8
incr = 1;
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10
B->
N
= 0;
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B->
cur
= 0;
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B->
tlen
= B->
incr
= incr;
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14
/* must have at least 2 nodes, since node[0] is never used */
15
if
(B->
tlen
== 1)
16
B->
tlen
= 2;
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B->
cmp
= cmp;
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B->
node
= (
BTREE_NODE
*)
malloc
(B->
tlen
*
sizeof
(
BTREE_NODE
));
20
if
(B->
node
==
NULL
)
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return
0;
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return
1;
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}
btree.h
NULL
#define NULL
Definition:
ccmath.h:32
btree_create
int btree_create(BTREE *B, int(*cmp)(const void *, const void *), int incr)
Definition:
create.c:5
malloc
void * malloc(YYSIZE_T)
BTREE_NODE
Definition:
btree.h:4
BTREE
Definition:
btree.h:11
BTREE::N
int N
Definition:
btree.h:14
BTREE::cmp
int(* cmp)(const void *, const void *)
Definition:
btree.h:17
BTREE::cur
int cur
Definition:
btree.h:16
BTREE::incr
int incr
Definition:
btree.h:15
BTREE::node
BTREE_NODE * node
Definition:
btree.h:12
BTREE::tlen
int tlen
Definition:
btree.h:13
lib
btree
create.c
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