Fix warnings exposed by clang-3.8
[openssl.git] / crypto / cast / cast_lcl.h
1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2  * All rights reserved.
3  *
4  * This package is an SSL implementation written
5  * by Eric Young (eay@cryptsoft.com).
6  * The implementation was written so as to conform with Netscapes SSL.
7  *
8  * This library is free for commercial and non-commercial use as long as
9  * the following conditions are aheared to.  The following conditions
10  * apply to all code found in this distribution, be it the RC4, RSA,
11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12  * included with this distribution is covered by the same copyright terms
13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14  *
15  * Copyright remains Eric Young's, and as such any Copyright notices in
16  * the code are not to be removed.
17  * If this package is used in a product, Eric Young should be given attribution
18  * as the author of the parts of the library used.
19  * This can be in the form of a textual message at program startup or
20  * in documentation (online or textual) provided with the package.
21  *
22  * Redistribution and use in source and binary forms, with or without
23  * modification, are permitted provided that the following conditions
24  * are met:
25  * 1. Redistributions of source code must retain the copyright
26  *    notice, this list of conditions and the following disclaimer.
27  * 2. Redistributions in binary form must reproduce the above copyright
28  *    notice, this list of conditions and the following disclaimer in the
29  *    documentation and/or other materials provided with the distribution.
30  * 3. All advertising materials mentioning features or use of this software
31  *    must display the following acknowledgement:
32  *    "This product includes cryptographic software written by
33  *     Eric Young (eay@cryptsoft.com)"
34  *    The word 'cryptographic' can be left out if the rouines from the library
35  *    being used are not cryptographic related :-).
36  * 4. If you include any Windows specific code (or a derivative thereof) from
37  *    the apps directory (application code) you must include an acknowledgement:
38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * The licence and distribution terms for any publically available version or
53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
54  * copied and put under another distribution licence
55  * [including the GNU Public Licence.]
56  */
57
58 #include "e_os.h"
59
60 #ifdef OPENSSL_SYS_WIN32
61 # include <stdlib.h>
62 #endif
63
64 #undef c2l
65 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
66                          l|=((unsigned long)(*((c)++)))<< 8L, \
67                          l|=((unsigned long)(*((c)++)))<<16L, \
68                          l|=((unsigned long)(*((c)++)))<<24L)
69
70 /* NOTE - c is not incremented as per c2l */
71 #undef c2ln
72 #define c2ln(c,l1,l2,n) { \
73                         c+=n; \
74                         l1=l2=0; \
75                         switch (n) { \
76                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
77                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
78                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
79                         case 5: l2|=((unsigned long)(*(--(c))));     \
80                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
81                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
82                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
83                         case 1: l1|=((unsigned long)(*(--(c))));     \
84                                 } \
85                         }
86
87 #undef l2c
88 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
89                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
90                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
91                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
92
93 /* NOTE - c is not incremented as per l2c */
94 #undef l2cn
95 #define l2cn(l1,l2,c,n) { \
96                         c+=n; \
97                         switch (n) { \
98                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
99                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
100                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
101                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
102                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
103                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
104                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
105                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
106                                 } \
107                         }
108
109 /* NOTE - c is not incremented as per n2l */
110 #define n2ln(c,l1,l2,n) { \
111                         c+=n; \
112                         l1=l2=0; \
113                         switch (n) { \
114                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
115                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
116                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
117                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
118                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
119                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
120                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
121                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
122                                 } \
123                         }
124
125 /* NOTE - c is not incremented as per l2n */
126 #define l2nn(l1,l2,c,n) { \
127                         c+=n; \
128                         switch (n) { \
129                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
130                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
131                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
132                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
133                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
134                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
135                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
136                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
137                                 } \
138                         }
139
140 #undef n2l
141 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
142                          l|=((unsigned long)(*((c)++)))<<16L, \
143                          l|=((unsigned long)(*((c)++)))<< 8L, \
144                          l|=((unsigned long)(*((c)++))))
145
146 #undef l2n
147 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
148                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
149                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
150                          *((c)++)=(unsigned char)(((l)     )&0xff))
151
152 #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
153 # define ROTL(a,n)     (_lrotl(a,n))
154 #elif defined(PEDANTIC)
155 # define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>((32-(n))&31)))
156 #else
157 # define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>(32-(n))))
158 #endif
159
160 #define C_M    0x3fc
161 #define C_0    22L
162 #define C_1    14L
163 #define C_2     6L
164 #define C_3     2L              /* left shift */
165
166 /* The rotate has an extra 16 added to it to help the x86 asm */
167 #if defined(CAST_PTR)
168 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
169         { \
170         int i; \
171         t=(key[n*2] OP1 R)&0xffffffffL; \
172         i=key[n*2+1]; \
173         t=ROTL(t,i); \
174         L^= (((((*(CAST_LONG *)((unsigned char *) \
175                         CAST_S_table0+((t>>C_2)&C_M)) OP2 \
176                 *(CAST_LONG *)((unsigned char *) \
177                         CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
178                 *(CAST_LONG *)((unsigned char *) \
179                         CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
180                 *(CAST_LONG *)((unsigned char *) \
181                         CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
182         }
183 #elif defined(CAST_PTR2)
184 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
185         { \
186         int i; \
187         CAST_LONG u,v,w; \
188         w=(key[n*2] OP1 R)&0xffffffffL; \
189         i=key[n*2+1]; \
190         w=ROTL(w,i); \
191         u=w>>C_2; \
192         v=w<<C_3; \
193         u&=C_M; \
194         v&=C_M; \
195         t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
196         u=w>>C_0; \
197         t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
198         v=w>>C_1; \
199         u&=C_M; \
200         v&=C_M; \
201         t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
202         t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
203         L^=(t&0xffffffff); \
204         }
205 #else
206 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
207         { \
208         CAST_LONG a,b,c,d; \
209         t=(key[n*2] OP1 R)&0xffffffff; \
210         t=ROTL(t,(key[n*2+1])); \
211         a=CAST_S_table0[(t>> 8)&0xff]; \
212         b=CAST_S_table1[(t    )&0xff]; \
213         c=CAST_S_table2[(t>>24)&0xff]; \
214         d=CAST_S_table3[(t>>16)&0xff]; \
215         L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
216         }
217 #endif
218
219 extern const CAST_LONG CAST_S_table0[256];
220 extern const CAST_LONG CAST_S_table1[256];
221 extern const CAST_LONG CAST_S_table2[256];
222 extern const CAST_LONG CAST_S_table3[256];
223 extern const CAST_LONG CAST_S_table4[256];
224 extern const CAST_LONG CAST_S_table5[256];
225 extern const CAST_LONG CAST_S_table6[256];
226 extern const CAST_LONG CAST_S_table7[256];