* Copyright (C) 2004, 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
+ * Copyright (C) 2007,2008 Øyvind Harboe *
+ * oyvind.harboe@zylin.com *
+ * *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <stdlib.h>
-#include <string.h>
-
-#include "types.h"
#include "log.h"
-
#include "binarybuffer.h"
-int buf_set_u32(u8* buffer, unsigned int first, unsigned int num, u32 value);
-u32 buf_get_u32(u8* buffer, unsigned int first, unsigned int num);
-u32 flip_u32(u32 value, unsigned int num);
-
-const unsigned char bit_reverse_table256[] =
-{
- 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
- 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
- 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
- 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
- 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
- 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
- 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
- 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
- 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
- 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
- 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
- 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
- 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
- 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
- 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
- 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
+static const unsigned char bit_reverse_table256[] = {
+ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
+ 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
+ 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
+ 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
+ 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
+ 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
+ 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
+ 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
+ 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
+ 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
+ 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
+ 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
+ 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
+ 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
+ 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
+ 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
};
-int buf_set_u32(u8* buffer, unsigned int first, unsigned int num, u32 value)
+void *buf_cpy(const void *from, void *_to, unsigned size)
{
- unsigned int i;
-
- if (!buffer)
- return ERROR_INVALID_ARGUMENTS;
-
- for (i=first; i<first+num; i++)
- {
- if (((value >> (i-first))&1) == 1)
- buffer[i/8] |= 1 << (i%8);
- else
- buffer[i/8] &= ~(1 << (i%8));
+ if (NULL == from || NULL == _to)
+ return NULL;
+
+ /* copy entire buffer */
+ memcpy(_to, from, DIV_ROUND_UP(size, 8));
+
+ /* mask out bits that don't belong to the buffer */
+ unsigned trailing_bits = size % 8;
+ if (trailing_bits) {
+ uint8_t *to = _to;
+ to[size / 8] &= (1 << trailing_bits) - 1;
}
-
- return ERROR_OK;
+ return _to;
}
-u32 buf_get_u32(u8* buffer, unsigned int first, unsigned int num)
+static bool buf_cmp_masked(uint8_t a, uint8_t b, uint8_t m)
{
- u32 result = 0;
- unsigned int i;
-
- if (!buffer)
- {
- ERROR("buffer not initialized");
- return 0;
- }
-
- for (i=first; i<first+num; i++)
- {
- if (((buffer[i/8]>>(i%8))&1) == 1)
- result |= 1 << (i-first);
- }
-
- return result;
+ return (a & m) != (b & m);
+}
+static bool buf_cmp_trailing(uint8_t a, uint8_t b, uint8_t m, unsigned trailing)
+{
+ uint8_t mask = (1 << trailing) - 1;
+ return buf_cmp_masked(a, b, mask & m);
}
-u8* buf_cpy(u8 *from, u8 *to, int size)
+bool buf_cmp(const void *_buf1, const void *_buf2, unsigned size)
{
- int num_bytes = CEIL(size, 8);
- unsigned int i;
+ if (!_buf1 || !_buf2)
+ return _buf1 != _buf2;
- if (from == NULL)
- return NULL;
+ unsigned last = size / 8;
+ if (memcmp(_buf1, _buf2, last) != 0)
+ return false;
- for (i = 0; i < num_bytes; i++)
- to[i] = from[i];
+ unsigned trailing = size % 8;
+ if (!trailing)
+ return false;
- return to;
+ const uint8_t *buf1 = _buf1, *buf2 = _buf2;
+ return buf_cmp_trailing(buf1[last], buf2[last], 0xff, trailing);
}
-int buf_cmp(u8 *buf1, u8 *buf2, int size)
+bool buf_cmp_mask(const void *_buf1, const void *_buf2,
+ const void *_mask, unsigned size)
{
- int num_bytes = CEIL(size, 8);
- int i;
-
- if (!buf1 || !buf2)
- return 1;
-
- for (i = 0; i < num_bytes; i++)
- {
- /* last byte */
- /* mask out bits that don't really belong to the buffer if size isn't a multiple of 8 bits */
- if ((size % 8) && (i == num_bytes -1 ))
- {
- if ((buf1[i] & ((1 << (size % 8)) - 1)) != (buf2[i] & ((1 << (size % 8)) - 1)))
- return 1;
- }
- else
- {
- if (buf1[i] != buf2[i])
- return 1;
- }
- }
+ if (!_buf1 || !_buf2)
+ return _buf1 != _buf2 || _buf1 != _mask;
- return 0;
+ const uint8_t *buf1 = _buf1, *buf2 = _buf2, *mask = _mask;
+ unsigned last = size / 8;
+ for (unsigned i = 0; i < last; i++) {
+ if (buf_cmp_masked(buf1[i], buf2[i], mask[i]))
+ return true;
+ }
+ unsigned trailing = size % 8;
+ if (!trailing)
+ return false;
+ return buf_cmp_trailing(buf1[last], buf2[last], mask[last], trailing);
}
-int buf_cmp_mask(u8 *buf1, u8 *buf2, u8 *mask, int size)
+
+void *buf_set_ones(void *_buf, unsigned size)
{
- int num_bytes = CEIL(size, 8);
- int i;
-
- for (i = 0; i < num_bytes; i++)
- {
- /* last byte */
- /* mask out bits that don't really belong to the buffer if size isn't a multiple of 8 bits */
- if ((size % 8) && (i == num_bytes -1 ))
- {
- if (((buf1[i] & ((1 << (size % 8)) - 1)) & ((1 << (size % 8)) - 1)) !=
- ((buf2[i] & ((1 << (size % 8)) - 1)) & ((1 << (size % 8)) - 1)))
- return 1;
- }
- else
- {
- if ((buf1[i] & mask[i]) != (buf2[i] & mask[i]))
- return 1;
- }
- }
+ uint8_t *buf = _buf;
+ if (!buf)
+ return NULL;
- return 0;
-}
+ memset(buf, 0xff, size / 8);
-u8* buf_set_ones(u8 *buf, int count)
-{
- int num_bytes = CEIL(count, 8);
- int i;
+ unsigned trailing_bits = size % 8;
+ if (trailing_bits)
+ buf[size / 8] = (1 << trailing_bits) - 1;
- for (i = 0; i < num_bytes; i++)
- {
- if (count >= 8)
- buf[i] = 0xff;
- else
- buf[i] = (1 << count) - 1;
-
- count -= 8;
- }
-
return buf;
}
-u8* buf_set_buf(u8 *src, int src_start, u8 *dst, int dst_start, int len)
+void *buf_set_buf(const void *_src, unsigned src_start,
+ void *_dst, unsigned dst_start, unsigned len)
{
- int src_idx = src_start, dst_idx = dst_start;
- int i;
-
- for (i = 0; i < len; i++)
- {
- if (((src[src_idx/8] >> (src_idx % 8)) & 1) == 1)
- dst[dst_idx/8] |= 1 << (dst_idx%8);
+ const uint8_t *src = _src;
+ uint8_t *dst = _dst;
+ unsigned i, sb, db, sq, dq, lb, lq;
+
+ sb = src_start / 8;
+ db = dst_start / 8;
+ sq = src_start % 8;
+ dq = dst_start % 8;
+ lb = len / 8;
+ lq = len % 8;
+
+ src += sb;
+ dst += db;
+
+ /* check if both buffers are on byte boundary and
+ * len is a multiple of 8bit so we can simple copy
+ * the buffer */
+ if ((sq == 0) && (dq == 0) && (lq == 0)) {
+ for (i = 0; i < lb; i++)
+ *dst++ = *src++;
+ return _dst;
+ }
+
+ /* fallback to slow bit copy */
+ for (i = 0; i < len; i++) {
+ if (((*src >> (sq&7)) & 1) == 1)
+ *dst |= 1 << (dq&7);
else
- dst[dst_idx/8] &= ~(1 << (dst_idx%8));
- dst_idx++;
- src_idx++;
+ *dst &= ~(1 << (dq&7));
+ if (sq++ == 7) {
+ sq = 0;
+ src++;
+ }
+ if (dq++ == 7) {
+ dq = 0;
+ dst++;
+ }
}
- return dst;
+ return _dst;
}
-u32 flip_u32(u32 value, unsigned int num)
+uint32_t flip_u32(uint32_t value, unsigned int num)
{
- u32 c;
-
- c = (bit_reverse_table256[value & 0xff] << 24) |
- (bit_reverse_table256[(value >> 8) & 0xff] << 16) |
+ uint32_t c = (bit_reverse_table256[value & 0xff] << 24) |
+ (bit_reverse_table256[(value >> 8) & 0xff] << 16) |
(bit_reverse_table256[(value >> 16) & 0xff] << 8) |
(bit_reverse_table256[(value >> 24) & 0xff]);
return c;
}
-char* buf_to_char(u8 *buf, int size)
+static int ceil_f_to_u32(float x)
{
- int char_len = CEIL(size, 8) * 2;
- char *char_buf = malloc(char_len + 1);
- int i;
- int bits_left = size;
-
- char_buf[char_len] = 0;
-
- for (i = 0; i < CEIL(size, 8); i++)
- {
- if (bits_left < 8)
- {
- buf[i] &= ((1 << bits_left) - 1);
+ if (x < 0) /* return zero for negative numbers */
+ return 0;
+
+ uint32_t y = x; /* cut off fraction */
+
+ if ((x - y) > 0.0) /* if there was a fractional part, increase by one */
+ y++;
+
+ return y;
+}
+
+char *buf_to_str(const void *_buf, unsigned buf_len, unsigned radix)
+{
+ float factor;
+ switch (radix) {
+ case 16:
+ factor = 2.0; /* log(256) / log(16) = 2.0 */
+ break;
+ case 10:
+ factor = 2.40824; /* log(256) / log(10) = 2.40824 */
+ break;
+ case 8:
+ factor = 2.66667; /* log(256) / log(8) = 2.66667 */
+ break;
+ default:
+ return NULL;
+ }
+
+ unsigned str_len = ceil_f_to_u32(DIV_ROUND_UP(buf_len, 8) * factor);
+ char *str = calloc(str_len + 1, 1);
+
+ const uint8_t *buf = _buf;
+ int b256_len = DIV_ROUND_UP(buf_len, 8);
+ for (int i = b256_len - 1; i >= 0; i--) {
+ uint32_t tmp = buf[i];
+ if (((unsigned)i == (buf_len / 8)) && (buf_len % 8))
+ tmp &= (0xff >> (8 - (buf_len % 8)));
+
+ /* base-256 digits */
+ for (unsigned j = str_len; j > 0; j--) {
+ tmp += (uint32_t)str[j-1] * 256;
+ str[j-1] = (uint8_t)(tmp % radix);
+ tmp /= radix;
}
-
- if (((buf[i] & 0x0f) >= 0) && ((buf[i] & 0x0f) <= 9))
- char_buf[char_len - 2*i - 1] = '0' + (buf[i] & 0xf);
- else
- char_buf[char_len - 2*i - 1] = 'a' + (buf[i] & 0xf) - 10;
-
- if (((buf[i] & 0xf0) >> 4 >= 0) && ((buf[i] & 0xf0) >> 4 <= 9))
- char_buf[char_len - 2*i - 2] = '0' + ((buf[i] & 0xf0) >> 4);
- else
- char_buf[char_len - 2*i - 2] = 'a' + ((buf[i] & 0xf0) >> 4) - 10;
-
}
- return char_buf;
+ const char * const DIGITS = "0123456789ABCDEF";
+ for (unsigned j = 0; j < str_len; j++)
+ str[j] = DIGITS[(int)str[j]];
+
+ return str;
}
-int char_to_buf(char *buf, int len, u8 *bin_buf, int buf_size)
+/** identify radix, and skip radix-prefix (0, 0x or 0X) */
+static void str_radix_guess(const char **_str, unsigned *_str_len,
+ unsigned *_radix)
{
- int bin_len = CEIL(len, 2);
- int i;
-
- if (buf_size < CEIL(bin_len, 8))
- return 0;
-
- if (len % 2)
+ unsigned radix = *_radix;
+ if (0 != radix)
+ return;
+ const char *str = *_str;
+ unsigned str_len = *_str_len;
+ if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) {
+ radix = 16;
+ str += 2;
+ str_len -= 2;
+ } else if ((str[0] == '0') && (str_len != 1)) {
+ radix = 8;
+ str += 1;
+ str_len -= 1;
+ } else
+ radix = 10;
+ *_str = str;
+ *_str_len = str_len;
+ *_radix = radix;
+}
+
+int str_to_buf(const char *str, unsigned str_len,
+ void *_buf, unsigned buf_len, unsigned radix)
+{
+ str_radix_guess(&str, &str_len, &radix);
+
+ float factor;
+ if (radix == 16)
+ factor = 0.5; /* log(16) / log(256) = 0.5 */
+ else if (radix == 10)
+ factor = 0.41524; /* log(10) / log(256) = 0.41524 */
+ else if (radix == 8)
+ factor = 0.375; /* log(8) / log(256) = 0.375 */
+ else
return 0;
-
- for (i = 0; i < strlen(buf); i++)
- {
- u32 tmp;
- sscanf(buf + 2*i, "%2x", &tmp);
- bin_buf[i] = tmp & 0xff;
+
+ /* copy to zero-terminated buffer */
+ char *charbuf = strndup(str, str_len);
+
+ /* number of digits in base-256 notation */
+ unsigned b256_len = ceil_f_to_u32(str_len * factor);
+ uint8_t *b256_buf = calloc(b256_len, 1);
+
+ /* go through zero terminated buffer
+ * input digits (ASCII) */
+ unsigned i;
+ for (i = 0; charbuf[i]; i++) {
+ uint32_t tmp = charbuf[i];
+ if ((tmp >= '0') && (tmp <= '9'))
+ tmp = (tmp - '0');
+ else if ((tmp >= 'a') && (tmp <= 'f'))
+ tmp = (tmp - 'a' + 10);
+ else if ((tmp >= 'A') && (tmp <= 'F'))
+ tmp = (tmp - 'A' + 10);
+ else
+ continue; /* skip characters other than [0-9,a-f,A-F] */
+
+ if (tmp >= radix)
+ continue; /* skip digits invalid for the current radix */
+
+ /* base-256 digits */
+ for (unsigned j = 0; j < b256_len; j++) {
+ tmp += (uint32_t)b256_buf[j] * radix;
+ b256_buf[j] = (uint8_t)(tmp & 0xFF);
+ tmp >>= 8;
+ }
+
}
-
- return bin_len * 8;
+
+ uint8_t *buf = _buf;
+ for (unsigned j = 0; j < DIV_ROUND_UP(buf_len, 8); j++) {
+ if (j < b256_len)
+ buf[j] = b256_buf[j];
+ else
+ buf[j] = 0;
+ }
+
+ /* mask out bits that don't belong to the buffer */
+ if (buf_len % 8)
+ buf[(buf_len / 8)] &= 0xff >> (8 - (buf_len % 8));
+
+ free(b256_buf);
+ free(charbuf);
+
+ return i;
}
-int buf_to_u32_handler(u8 *in_buf, void *priv)
+void bit_copy_queue_init(struct bit_copy_queue *q)
{
- u32 *dest = priv;
-
- *dest = buf_get_u32(in_buf, 0, 32);
-
+ INIT_LIST_HEAD(&q->list);
+}
+
+int bit_copy_queued(struct bit_copy_queue *q, uint8_t *dst, unsigned dst_offset, const uint8_t *src,
+ unsigned src_offset, unsigned bit_count)
+{
+ struct bit_copy_queue_entry *qe = malloc(sizeof(*qe));
+ if (!qe)
+ return ERROR_FAIL;
+
+ qe->dst = dst;
+ qe->dst_offset = dst_offset;
+ qe->src = src;
+ qe->src_offset = src_offset;
+ qe->bit_count = bit_count;
+ list_add_tail(&qe->list, &q->list);
+
return ERROR_OK;
}
+
+void bit_copy_execute(struct bit_copy_queue *q)
+{
+ struct bit_copy_queue_entry *qe;
+ struct bit_copy_queue_entry *tmp;
+ list_for_each_entry_safe(qe, tmp, &q->list, list) {
+ bit_copy(qe->dst, qe->dst_offset, qe->src, qe->src_offset, qe->bit_count);
+ list_del(&qe->list);
+ free(qe);
+ }
+}
+
+void bit_copy_discard(struct bit_copy_queue *q)
+{
+ struct bit_copy_queue_entry *qe;
+ struct bit_copy_queue_entry *tmp;
+ list_for_each_entry_safe(qe, tmp, &q->list, list) {
+ list_del(&qe->list);
+ free(qe);
+ }
+}
+
+int unhexify(char *bin, const char *hex, int count)
+{
+ int i, tmp;
+
+ for (i = 0; i < count; i++) {
+ if (sscanf(hex + (2 * i), "%02x", &tmp) != 1)
+ return i;
+ bin[i] = tmp;
+ }
+
+ return i;
+}
+
+int hexify(char *hex, const char *bin, int count, int out_maxlen)
+{
+ int i, cmd_len = 0;
+
+ /* May use a length, or a null-terminated string as input. */
+ if (count == 0)
+ count = strlen(bin);
+
+ for (i = 0; i < count; i++)
+ cmd_len += snprintf(hex + cmd_len, out_maxlen - cmd_len, "%02x", bin[i] & 0xff);
+
+ return cmd_len;
+}
+
+void buffer_shr(void *_buf, unsigned buf_len, unsigned count)
+{
+ unsigned i;
+ unsigned char *buf = _buf;
+ unsigned bytes_to_remove;
+ unsigned shift;
+
+ bytes_to_remove = count / 8;
+ shift = count - (bytes_to_remove * 8);
+
+ for (i = 0; i < (buf_len - 1); i++)
+ buf[i] = (buf[i] >> shift) | ((buf[i+1] << (8 - shift)) & 0xff);
+
+ buf[(buf_len - 1)] = buf[(buf_len - 1)] >> shift;
+
+ if (bytes_to_remove) {
+ memmove(buf, &buf[bytes_to_remove], buf_len - bytes_to_remove);
+ memset(&buf[buf_len - bytes_to_remove], 0, bytes_to_remove);
+ }
+}
Code Review / openocd.git / blobdiff