Arnaldo Carvalho de Melo | a2a99e8 | 2009-10-05 14:26:18 -0300 | [diff] [blame] | 1 | #include <string.h> |
Arnaldo Carvalho de Melo | ea5cc87 | 2009-06-01 22:31:03 -0300 | [diff] [blame] | 2 | #include "string.h" |
| 3 | |
| 4 | static int hex(char ch) |
| 5 | { |
| 6 | if ((ch >= '0') && (ch <= '9')) |
| 7 | return ch - '0'; |
| 8 | if ((ch >= 'a') && (ch <= 'f')) |
| 9 | return ch - 'a' + 10; |
| 10 | if ((ch >= 'A') && (ch <= 'F')) |
| 11 | return ch - 'A' + 10; |
| 12 | return -1; |
| 13 | } |
| 14 | |
| 15 | /* |
| 16 | * While we find nice hex chars, build a long_val. |
| 17 | * Return number of chars processed. |
| 18 | */ |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 19 | int hex2u64(const char *ptr, u64 *long_val) |
Arnaldo Carvalho de Melo | ea5cc87 | 2009-06-01 22:31:03 -0300 | [diff] [blame] | 20 | { |
| 21 | const char *p = ptr; |
| 22 | *long_val = 0; |
| 23 | |
| 24 | while (*p) { |
| 25 | const int hex_val = hex(*p); |
| 26 | |
| 27 | if (hex_val < 0) |
| 28 | break; |
| 29 | |
| 30 | *long_val = (*long_val << 4) | hex_val; |
| 31 | p++; |
| 32 | } |
| 33 | |
| 34 | return p - ptr; |
| 35 | } |
Arnaldo Carvalho de Melo | a2a99e8 | 2009-10-05 14:26:18 -0300 | [diff] [blame] | 36 | |
| 37 | char *strxfrchar(char *s, char from, char to) |
| 38 | { |
| 39 | char *p = s; |
| 40 | |
| 41 | while ((p = strchr(p, from)) != NULL) |
| 42 | *p++ = to; |
| 43 | |
| 44 | return s; |
| 45 | } |