for (i = 0; i < num_bytes; i++)
to[i] = from[i];
+
+ /* mask out bits that don't belong to the buffer */
+ if (size % 8)
+ {
+ to[size / 8] &= (0xff >> (8 - (size % 8)));
+ }
return to;
}
/* 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)))
+ if ((buf1[i] & ((1 << (size % 8)) - 1) & mask[i]) !=
+ (buf2[i] & ((1 << (size % 8)) - 1) & mask[i]))
return 1;
}
else
return c;
}
-char* buf_to_char(u8 *buf, int size)
+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;
+ u32 y;
+
+ if (x < 0) /* return zero for negative numbers */
+ return 0;
- char_buf[char_len] = 0;
+ 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(u8 *buf, int buf_len, int radix)
+{
+ const char *DIGITS = "0123456789abcdef";
+ float factor;
+ char *str;
+ int str_len;
+ int b256_len = CEIL(buf_len, 8);
+ u32 tmp;
+
+ int j; /* base-256 digits */
+ int i; /* output digits (radix) */
- for (i = 0; i < CEIL(size, 8); i++)
+ if (radix == 16)
{
- if (bits_left < 8)
- {
- buf[i] &= ((1 << bits_left) - 1);
- }
-
- 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;
-
+ factor = 2.0; /* log(256) / log(16) = 2.0 */
+ }
+ else if (radix == 10)
+ {
+ factor = 2.40824; /* log(256) / log(10) = 2.40824 */
+ }
+ else if (radix == 8)
+ {
+ factor = 2.66667; /* log(256) / log(8) = 2.66667 */
}
+ else
+ return NULL;
+
+ str_len = ceil_f_to_u32(CEIL(buf_len, 8) * factor);
+ str = calloc(str_len + 1, 1);
+
+ for (i = b256_len - 1; i >= 0; i--)
+ {
+ tmp = buf[i];
+ if ((i == (buf_len / 8)) && (buf_len % 8))
+ tmp &= (0xff >> (8 - (buf_len % 8)));
- return char_buf;
+ for (j = str_len; j > 0; j--)
+ {
+ tmp += (u32)str[j-1] * 256;
+ str[j-1] = (u8)(tmp % radix);
+ tmp /= radix;
+ }
+ }
+
+ for (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)
+int str_to_buf(char* str, int str_len, u8 *buf, int buf_len, int radix)
{
- int bin_len = CEIL(len, 2);
- int i;
+ char *charbuf;
+ u32 tmp;
+ float factor;
+ u8 *b256_buf;
+ int b256_len;
- if (buf_size < CEIL(bin_len, 8))
- return 0;
+ int j; /* base-256 digits */
+ int i; /* input digits (ASCII) */
+
+ if (radix == 0)
+ {
+ /* identify radix, and skip radix-prefix (0, 0x or 0X) */
+ if ((str[0] == '0') && (str[1] && ((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;
+ }
+ }
- if (len % 2)
+ 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;
+
+ /* copy to zero-terminated buffer */
+ charbuf = malloc(str_len + 1);
+ memcpy(charbuf, str, str_len);
+ charbuf[str_len] = '\0';
+
+ /* number of digits in base-256 notation */
+ b256_len = ceil_f_to_u32(str_len * factor);
+ b256_buf = calloc(b256_len, 1);
+
+ /* go through zero terminated buffer */
+ for (i = 0; charbuf[i]; i++)
+ {
+ 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 */
+
+ for (j = 0; j < b256_len; j++)
+ {
+ tmp += (u32)b256_buf[j] * radix;
+ b256_buf[j] = (u8)(tmp & 0xFF);
+ tmp >>= 8;
+ }
+
+ }
- for (i = 0; i < strlen(buf); i++)
+ for (j = 0; j < CEIL(buf_len, 8); j++)
{
- u32 tmp;
- sscanf(buf + 2*i, "%2x", &tmp);
- bin_buf[i] = tmp & 0xff;
+ 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 bin_len * 8;
+ return i;
}
-int buf_to_u32_handler(u8 *in_buf, void *priv)
+int buf_to_u32_handler(u8 *in_buf, void *priv, struct scan_field_s *field)
{
u32 *dest = priv;
projects / fw / openocd / blobdiff