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3559b26c LM |
1 | #include <malloc.h> |
2 | #include <math.h> | |
3 | #include <stdio.h> | |
4 | #include <string.h> | |
5 | ||
6 | #include "debug.h" | |
7 | #include "alloc.h" | |
8 | ||
9 | #include "tabular.h" | |
10 | ||
11 | /* management function */ | |
12 | ||
13 | /* allocate a tab of N elements */ | |
14 | ||
15 | tab_t *alloc_tab (int nb) | |
16 | { | |
17 | tab_t *tab = (tab_t *) callocordie (1, sizeof (tab_t)); | |
18 | if (nb > 0) { | |
19 | tab->data = (double *) callocordie (nb, sizeof (double)); | |
20 | tab->size = nb; | |
21 | } | |
22 | return (tab); | |
23 | } | |
24 | ||
25 | /* resize a tab to size N */ | |
26 | ||
27 | tab_t *resize_tab (tab_t *tab, int nb) | |
28 | { | |
29 | double *tmp = NULL; | |
30 | tab = (tab) ? tab : (tab_t *) callocordie (1, sizeof (tab_t)); | |
31 | nb = (nb > 0) ? nb : 0; | |
32 | if (nb > 0) { | |
33 | tmp = (double *) callocordie (nb, sizeof (double)); | |
34 | memcpy (tmp, tab->data, ((tab->size < nb) ? tab->size : nb) * sizeof (double)); | |
35 | } | |
36 | free (tab->data); | |
37 | tab->data = tmp; | |
38 | tab->size = nb; | |
39 | return tab; | |
40 | } | |
41 | ||
42 | /* copy a tab */ | |
43 | ||
44 | tab_t *copy_tab (tab_t *tab) | |
45 | { | |
e952523a LM |
46 | if (tab == NULL) { |
47 | return NULL; | |
48 | } | |
3559b26c LM |
49 | tab_t *new = alloc_tab (tab->size); |
50 | memcpy (new->data, tab->data, tab->size * sizeof (double)); | |
51 | return new; | |
52 | } | |
53 | ||
54 | /* free a tab */ | |
55 | ||
56 | void free_tab (tab_t *tab) | |
57 | { | |
58 | if (tab) { | |
59 | if (tab->data) { | |
60 | free (tab->data); | |
61 | } | |
62 | free (tab); | |
63 | } | |
64 | } | |
65 | ||
66 | /* get table size */ | |
67 | ||
68 | int size_tab (tab_t *tab) | |
69 | { | |
70 | int ret = 0; | |
71 | if (tab) { | |
72 | ret = tab->size; | |
73 | } | |
74 | return ret; | |
75 | } | |
76 | ||
77 | /* set an element into a tab at position id [1..N] */ | |
78 | ||
79 | double set_tab (tab_t *tab, int id, double val) | |
80 | { | |
81 | double ret = NAN; | |
82 | if ((!tab) || (id < 1) || (id > tab->size)) { | |
83 | VERBOSE (WARNING, fprintf (stdout, "error out of bounds (%d/%d)\n", id, (tab) ? tab->size : 0)); | |
84 | } else { | |
85 | ret = tab->data[id - 1] = val; | |
86 | } | |
87 | return ret; | |
88 | } | |
89 | ||
90 | /* get an element from a tab at position id [1..N] */ | |
91 | ||
92 | double get_tab (tab_t *tab, int id) | |
93 | { | |
94 | double ret = NAN; | |
95 | if ((!tab) || (id < 1) || (id > tab->size)) { | |
96 | VERBOSE (WARNING, fprintf (stdout, "error out of bounds (%d/%d)\n", id, (tab) ? tab->size : 0)); | |
97 | } else { | |
98 | ret = tab->data[id - 1]; | |
99 | } | |
100 | return ret; | |
101 | } | |
102 | ||
103 | /* push an element into a tab at position id [1.. N](-1 means end) resulting to a tab of N+1 elements */ | |
104 | ||
105 | double push_tab (tab_t *tab, int id, double val) | |
106 | { | |
107 | double ret = NAN; | |
108 | if ((!tab) || (((id < 1) || (id > tab->size + 1)) && (id != -1))) { | |
109 | VERBOSE (WARNING, fprintf (stdout, "error out of bounds (%d/%d)\n", id, (tab) ? tab->size : 0)); | |
110 | } else { | |
111 | ||
112 | /* special case for inserting an element at the end */ | |
113 | id = (id == -1) ? tab->size + 1 : id; | |
114 | ||
115 | /* create larger tab */ | |
116 | double *tmp = (double *) callocordie (tab->size + 1, sizeof (double)); | |
117 | memcpy (tmp, tab->data, (id - 1) * sizeof (double)); | |
118 | ret = tmp[id - 1] = val; | |
119 | memcpy (tmp + id , tab->data + id - 1, (tab->size - id + 1) * sizeof (double)); | |
120 | ||
121 | /* update structure */ | |
122 | free (tab->data); | |
123 | tab->data = tmp; | |
124 | tab->size++; | |
125 | } | |
126 | return ret; | |
127 | } | |
128 | ||
129 | /* pop an element from a tab at position id [1.. N](-1 means last) resulting to a tab of N-1 elements */ | |
130 | ||
131 | double pop_tab (tab_t *tab, int id) | |
132 | { | |
133 | double ret = NAN; | |
134 | if ((!tab) || (((id < 1) || (id > tab->size)) && (id != -1))) { | |
135 | VERBOSE (WARNING, fprintf (stdout, "error out of bounds (%d/%d)\n", id, (tab) ? tab->size : 0)); | |
136 | } else { | |
137 | ret = tab->data[id - 1]; | |
138 | ||
139 | /* special case for inserting an element at the end */ | |
140 | id = (id == -1) ? tab->size : id; | |
141 | ||
142 | /* create larger tab */ | |
143 | double *tmp = (double *) callocordie (tab->size - 1, sizeof (double)); | |
144 | memcpy (tmp, tab->data, (id - 1) * sizeof (double)); | |
145 | memcpy (tmp + id - 1, tab->data + id, (tab->size - id) * sizeof (double)); | |
146 | ||
147 | /* update structure */ | |
148 | free (tab->data); | |
149 | tab->data = tmp; | |
150 | tab->size--; | |
151 | } | |
152 | return ret; | |
153 | } | |
154 | ||
155 | /* sort tab */ | |
156 | ||
157 | void order_tab (tab_t *tab) | |
158 | { | |
159 | int i, j; | |
160 | if ((!tab) || (tab->size < 3)) { | |
161 | VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", tab->size)); | |
162 | return; | |
163 | } | |
164 | ||
165 | /* buble sort */ | |
166 | for (i = 0; i < tab->size - 1; i++) { | |
167 | int done = 0; | |
168 | for (j = 0; j < tab->size - 1; j++) { | |
169 | double tab_j = tab->data[j]; | |
170 | double tab_jp1 = tab->data[j + 1]; | |
171 | if (tab_j > tab_jp1) { | |
172 | tab->data[j] = tab_jp1; | |
173 | tab->data[j + 1] = tab_j; | |
174 | done = 1; | |
175 | } | |
176 | } | |
177 | if (done == 0) { | |
178 | break; | |
179 | } | |
180 | } | |
181 | } | |
182 | ||
183 | /* vim: set ts=4 sw=4 et: */ |