lib/util/util_str_hex.c

   1 #include "replace.h"
   2 #include "util_str_hex.h"
   3 #include "lib/util/data_blob.h"
   4 #include "librpc/gen_ndr/misc.h"
   5
   6 static bool hex_uint16(const char *in, uint16_t *out)
   7 {
   8         uint8_t hi=0, lo=0;
   9         bool ok = hex_byte(in, &hi) && hex_byte(in+2, &lo);
  10         *out = (((uint16_t)hi)<<8) + lo;
  11         return ok;
  12 }
  13
  14 bool hex_uint32(const char *in, uint32_t *out)
  15 {
  16         uint16_t hi=0, lo=0;
  17         bool ok = hex_uint16(in, &hi) && hex_uint16(in+4, &lo);
  18         *out = (((uint32_t)hi)<<16) + lo;
  19         return ok;
  20 }
  21
  22 bool parse_guid_string(const char *s, struct GUID *guid)
  23 {
  24         bool ok;
  25         int i;
  26         /* "e12b56b6-0a95-11d1-adbb-00c04fd8d5cd"
  27                 |     |    |    |    |
  28                 |     |    |    |    \ node[6]
  29                 |     |    |    \_____ clock_seq[2]
  30                 |     |    \__________ time_hi_and_version
  31                 |     \_______________ time_mid
  32                 \_____________________ time_low
  33         */
  34
  35         ok = hex_uint32(s, &guid->time_low);
  36         if (!ok || (s[8] != '-')) {
  37                 return false;
  38         }
  39         s += 9;
  40
  41         ok = hex_uint16(s, &guid->time_mid);
  42         if (!ok || (s[4] != '-')) {
  43                 return false;
  44         }
  45         s += 5;
  46
  47         ok = hex_uint16(s, &guid->time_hi_and_version);
  48         if (!ok || (s[4] != '-')) {
  49                 return false;
  50         }
  51         s += 5;
  52
  53         ok = hex_byte(s, &guid->clock_seq[0]) &&
  54                 hex_byte(s+2, &guid->clock_seq[1]);
  55         if (!ok || (s[4] != '-')) {
  56                 return false;
  57         }
  58         s += 5;
  59
  60         for (i = 0; i < 6; i++) {
  61                 ok = hex_byte(s, &guid->node[i]);
  62                 if (!ok) {
  63                         return false;
  64                 }
  65                 s += 2;
  66         }
  67
  68         return true;
  69 }