improve buf_set_buf helper
[openocd.git] / src / helper / binarybuffer.h
1 /***************************************************************************
2 * Copyright (C) 2004, 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2007,2008 √ėyvind Harboe *
6 * oyvind.harboe@zylin.com *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
23 #ifndef BINARYBUFFER_H
24 #define BINARYBUFFER_H
25
26 #include "types.h"
27
28 /** @file
29 * Support functions to access arbitrary bits in a byte array
30 */
31
32 /* inlining this will help show what fn that is taking time during profiling. */
33 static inline void buf_set_u32(uint8_t* buffer,
34 unsigned int first, unsigned int num, uint32_t value)
35 {
36 if ((num == 32) && (first == 0)) {
37 buffer[3] = (value >> 24) & 0xff;
38 buffer[2] = (value >> 16) & 0xff;
39 buffer[1] = (value >> 8) & 0xff;
40 buffer[0] = (value >> 0) & 0xff;
41 } else {
42 for (unsigned i = first; i < first + num; i++)
43 {
44 if (((value >> (i - first)) & 1) == 1)
45 buffer[i / 8] |= 1 << (i % 8);
46 else
47 buffer[i / 8] &= ~(1 << (i % 8));
48 }
49 }
50 }
51 static inline uint32_t buf_get_u32(const uint8_t* buffer,
52 unsigned int first, unsigned int num)
53 {
54 if ((num == 32) && (first == 0)) {
55 return (((uint32_t)buffer[3]) << 24) |
56 (((uint32_t)buffer[2]) << 16) |
57 (((uint32_t)buffer[1]) << 8) |
58 (((uint32_t)buffer[0]) << 0);
59 } else {
60 uint32_t result = 0;
61 for (unsigned i = first; i < first + num; i++)
62 {
63 if (((buffer[i / 8] >> (i % 8)) & 1) == 1)
64 result |= 1 << (i - first);
65 }
66 return result;
67 }
68 }
69
70 /// flip_u32 inverts the bit order inside a 32-bit word (31..0 -> 0..31)
71 uint32_t flip_u32(uint32_t value, unsigned int num);
72
73 bool buf_cmp(const void *buf1, const void *buf2, unsigned size);
74 bool buf_cmp_mask(const void *buf1, const void *buf2,
75 const void *mask, unsigned size);
76
77 void* buf_cpy(const void *from, void *to, unsigned size);
78
79 void* buf_set_ones(void *buf, unsigned count);
80
81 void* buf_set_buf(const void *src, unsigned src_start,
82 void *dst, unsigned dst_start, unsigned len);
83
84 int str_to_buf(const char *str, unsigned len,
85 void *bin_buf, unsigned buf_size, unsigned radix);
86 char* buf_to_str(const void *buf, unsigned size, unsigned radix);
87
88 #define CEIL(m, n) (((m) + (n) - 1) / (n))
89
90 /* read a uint32_t from a buffer in target memory endianness */
91 static inline uint32_t fast_target_buffer_get_u32(const uint8_t *p, int le)
92 {
93 return le ? le_to_h_u32(p) : be_to_h_u32(p);
94 }
95
96 #endif /* BINARYBUFFER_H */

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