GRASS GIS 8 Programmer's Manual 8.2.1RC1(2022)-exported
ilist.c
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1/*
2 ****************************************************************************
3 *
4 * MODULE: gis library
5 *
6 * AUTHOR(S): Original author CERL, probably Dave Gerdes.
7 * Update to GRASS 5.7 Radim Blazek.
8 *
9 * PURPOSE: Lower level functions for reading and manipulating integer list
10 *
11 * COPYRIGHT: (C) 2001 by the GRASS Development Team
12 *
13 * This program is free software under the GNU General Public
14 * License (>=v2). Read the file COPYING that comes with GRASS
15 * for details.
16 *
17 *****************************************************************************/
18#include <stdlib.h>
19#include <grass/gis.h>
20
21/**
22 * \brief Free allocated memory of an integer list
23 *
24 * \param list The pointer to an integer list
25 *
26 * */
27void G_free_ilist(struct ilist *list)
28{
29 if(list->value)
30 G_free(list->value);
31 G_free(list);
32}
33
34/**
35 * \brief Return a new integer list.
36 *
37 * G_fatal_error() will be invoked by the
38 * allocation function.
39 *
40 * \return list The pointer to a new allocated integer list
41 *
42 * */
43struct ilist * G_new_ilist()
44{
45 struct ilist *l = G_malloc(sizeof(struct ilist));
46 l->value = NULL;
48 return l;
49}
50
51/**
52 * \brief Init an integer list and free allocated memory
53 *
54 * \param list The pointer to an integer list
55 *
56 * */
57void G_init_ilist(struct ilist *list)
58{
59 if(list->value)
60 G_free(list->value);
61 list->value = NULL;
62 list->n_values = 0;
63 list->alloc_values = 0;
64}
65
66/**
67 * \brief Add item to ilist
68 *
69 * This function adds an integer to the list but does not check for duplicates.
70 * In case reallocation fails, G_fatal_error() will be invoked by the
71 * allocation function.
72 *
73 * \param list The ilist pointer
74 * \param val The value to attach
75 *
76 * */
77void G_ilist_add(struct ilist *list, int val)
78{
79 if (list->n_values == list->alloc_values) {
80 size_t size = (list->n_values + 1000) * sizeof(int);
81 void *p = G_realloc((void *)list->value, size);
82
83 list->value = (int *)p;
84 list->alloc_values = list->n_values + 1000;
85 }
86
87 list->value[list->n_values] = val;
88 list->n_values++;
89}
void G_free(void *buf)
Free allocated memory.
Definition: alloc.c:149
#define NULL
Definition: ccmath.h:32
double l
struct ilist * G_new_ilist()
Return a new integer list.
Definition: ilist.c:43
void G_init_ilist(struct ilist *list)
Init an integer list and free allocated memory.
Definition: ilist.c:57
void G_ilist_add(struct ilist *list, int val)
Add item to ilist.
Definition: ilist.c:77
void G_free_ilist(struct ilist *list)
Free allocated memory of an integer list.
Definition: ilist.c:27
struct list * list
Definition: read_list.c:24