Root/
Source at commit b386be689295730688885552666ea40b2e639b14 created 11 years 11 months ago. By Maarten ter Huurne, Revert "MIPS: JZ4740: reset: Initialize hibernate wakeup counters." | |
---|---|
1 | /* mpiutil.ac - Utility functions for MPI |
2 | * Copyright (C) 1998, 1999 Free Software Foundation, Inc. |
3 | * |
4 | * This file is part of GnuPG. |
5 | * |
6 | * GnuPG is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * GnuPG is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
19 | */ |
20 | |
21 | #include "mpi-internal.h" |
22 | |
23 | /**************** |
24 | * Note: It was a bad idea to use the number of limbs to allocate |
25 | * because on a alpha the limbs are large but we normally need |
26 | * integers of n bits - So we should chnage this to bits (or bytes). |
27 | * |
28 | * But mpi_alloc is used in a lot of places :-) |
29 | */ |
30 | MPI mpi_alloc(unsigned nlimbs) |
31 | { |
32 | MPI a; |
33 | |
34 | a = kmalloc(sizeof *a, GFP_KERNEL); |
35 | if (!a) |
36 | return a; |
37 | |
38 | if (nlimbs) { |
39 | a->d = mpi_alloc_limb_space(nlimbs); |
40 | if (!a->d) { |
41 | kfree(a); |
42 | return NULL; |
43 | } |
44 | } else { |
45 | a->d = NULL; |
46 | } |
47 | |
48 | a->alloced = nlimbs; |
49 | a->nlimbs = 0; |
50 | a->sign = 0; |
51 | a->flags = 0; |
52 | a->nbits = 0; |
53 | return a; |
54 | } |
55 | EXPORT_SYMBOL_GPL(mpi_alloc); |
56 | |
57 | mpi_ptr_t mpi_alloc_limb_space(unsigned nlimbs) |
58 | { |
59 | size_t len = nlimbs * sizeof(mpi_limb_t); |
60 | |
61 | if (!len) |
62 | return NULL; |
63 | |
64 | return kmalloc(len, GFP_KERNEL); |
65 | } |
66 | |
67 | void mpi_free_limb_space(mpi_ptr_t a) |
68 | { |
69 | if (!a) |
70 | return; |
71 | |
72 | kfree(a); |
73 | } |
74 | |
75 | void mpi_assign_limb_space(MPI a, mpi_ptr_t ap, unsigned nlimbs) |
76 | { |
77 | mpi_free_limb_space(a->d); |
78 | a->d = ap; |
79 | a->alloced = nlimbs; |
80 | } |
81 | |
82 | /**************** |
83 | * Resize the array of A to NLIMBS. the additional space is cleared |
84 | * (set to 0) [done by m_realloc()] |
85 | */ |
86 | int mpi_resize(MPI a, unsigned nlimbs) |
87 | { |
88 | void *p; |
89 | |
90 | if (nlimbs <= a->alloced) |
91 | return 0; /* no need to do it */ |
92 | |
93 | if (a->d) { |
94 | p = kmalloc(nlimbs * sizeof(mpi_limb_t), GFP_KERNEL); |
95 | if (!p) |
96 | return -ENOMEM; |
97 | memcpy(p, a->d, a->alloced * sizeof(mpi_limb_t)); |
98 | kfree(a->d); |
99 | a->d = p; |
100 | } else { |
101 | a->d = kzalloc(nlimbs * sizeof(mpi_limb_t), GFP_KERNEL); |
102 | if (!a->d) |
103 | return -ENOMEM; |
104 | } |
105 | a->alloced = nlimbs; |
106 | return 0; |
107 | } |
108 | |
109 | void mpi_clear(MPI a) |
110 | { |
111 | a->nlimbs = 0; |
112 | a->nbits = 0; |
113 | a->flags = 0; |
114 | } |
115 | |
116 | void mpi_free(MPI a) |
117 | { |
118 | if (!a) |
119 | return; |
120 | |
121 | if (a->flags & 4) |
122 | kfree(a->d); |
123 | else |
124 | mpi_free_limb_space(a->d); |
125 | |
126 | if (a->flags & ~7) |
127 | pr_info("invalid flag value in mpi\n"); |
128 | kfree(a); |
129 | } |
130 | EXPORT_SYMBOL_GPL(mpi_free); |
131 | |
132 | /**************** |
133 | * Note: This copy function should not interpret the MPI |
134 | * but copy it transparently. |
135 | */ |
136 | int mpi_copy(MPI *copied, const MPI a) |
137 | { |
138 | size_t i; |
139 | MPI b; |
140 | |
141 | *copied = NULL; |
142 | |
143 | if (a) { |
144 | b = mpi_alloc(a->nlimbs); |
145 | if (!b) |
146 | return -ENOMEM; |
147 | |
148 | b->nlimbs = a->nlimbs; |
149 | b->sign = a->sign; |
150 | b->flags = a->flags; |
151 | b->nbits = a->nbits; |
152 | |
153 | for (i = 0; i < b->nlimbs; i++) |
154 | b->d[i] = a->d[i]; |
155 | |
156 | *copied = b; |
157 | } |
158 | |
159 | return 0; |
160 | } |
161 | |
162 | int mpi_set(MPI w, const MPI u) |
163 | { |
164 | mpi_ptr_t wp, up; |
165 | mpi_size_t usize = u->nlimbs; |
166 | int usign = u->sign; |
167 | |
168 | if (RESIZE_IF_NEEDED(w, (size_t) usize) < 0) |
169 | return -ENOMEM; |
170 | |
171 | wp = w->d; |
172 | up = u->d; |
173 | MPN_COPY(wp, up, usize); |
174 | w->nlimbs = usize; |
175 | w->nbits = u->nbits; |
176 | w->flags = u->flags; |
177 | w->sign = usign; |
178 | return 0; |
179 | } |
180 | |
181 | int mpi_set_ui(MPI w, unsigned long u) |
182 | { |
183 | if (RESIZE_IF_NEEDED(w, 1) < 0) |
184 | return -ENOMEM; |
185 | w->d[0] = u; |
186 | w->nlimbs = u ? 1 : 0; |
187 | w->sign = 0; |
188 | w->nbits = 0; |
189 | w->flags = 0; |
190 | return 0; |
191 | } |
192 | |
193 | MPI mpi_alloc_set_ui(unsigned long u) |
194 | { |
195 | MPI w = mpi_alloc(1); |
196 | if (!w) |
197 | return w; |
198 | w->d[0] = u; |
199 | w->nlimbs = u ? 1 : 0; |
200 | w->sign = 0; |
201 | return w; |
202 | } |
203 | |
204 | void mpi_swap(MPI a, MPI b) |
205 | { |
206 | struct gcry_mpi tmp; |
207 | |
208 | tmp = *a; |
209 | *a = *b; |
210 | *b = tmp; |
211 | } |
212 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9