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New functions scan_hex ...

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FossilOrigin-Name: 9e672fa96f74307bac2cb2e3797697dddca25bb98e3c26d2c560e4a168c620af
This commit is contained in:
7u83@mail.ru 2015-05-04 05:43:40 +00:00
parent 4048bec461
commit 7cdb424fa7
1 changed files with 51 additions and 0 deletions
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51
src/capwap/format.c
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@ -15,6 +15,8 @@
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file
* @brief Implementation of various format functions.
@ -57,5 +59,54 @@ int cw_format_hex_bytes(char *dst, const char *format, const char *delim,
/**
* Read hex bytes from a string to an uint8_t array
* @param dst destination array
* @param s string to read
* @param len length of string
* @return 0 if all was ok \n 1 if an error has occured.
*/
int cw_format_scan_hex_bytes(uint8_t *dst,const char *s, int len)
{
int rc ;
int err=0;
int val;
int c;
int i;
if ( len & 1){
rc = sscanf(s,"%01X",&c);
if (rc!=1){
c=0;
err=1;
}
*dst++=c;
s++;
len--;
}
for (i=0; i<len; i++){
rc = sscanf(s+i,"%01X",&c);
if (rc!=1){
c=0;
err=1;
}
if (!(i&1)) {
val = c<<4;
}
else{
val |= c;
*dst++=val;
}
}
return err;
}