sven/can-utils
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Introduced new functions:

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unsigned char asc2nibble(char c);
int hexstring2candata(char *arg, struct can_frame *cf);
(see documentation in lib.h)
As prerequsite to fix the commandline interface of cangen.
This commit is contained in:
Oliver Hartkopp
2008-06-20 09:15:13 +00:00
parent 278344e5d5
commit ddbe7d9575
2 changed files with 58 additions and 2 deletions
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lib.c
+30 -2
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@@ -59,7 +59,7 @@
#define MAX_CANFRAME "12345678#01.23.45.67.89.AB.CD.EF"
#define MAX_LONG_CANFRAME "12345678 [8] 10101010 10101010 10101010 10101010 10101010 10101010 10101010 10101010 '........'"
static int asc2nibble(char c) {
unsigned char asc2nibble(char c) {
if ((c >= '0') && (c <= '9'))
return c - '0';
@@ -73,10 +73,38 @@ static int asc2nibble(char c) {
return 16; /* error */
}
int hexstring2candata(char *arg, struct can_frame *cf) {
int len = strlen(arg);
int i;
unsigned char tmp;
if (!len || len%2 || len > 16)
return 1;
for (i=0; i < len/2; i++) {
tmp = asc2nibble(*(arg+(2*i)));
if (tmp > 0x0F)
return 1;
cf->data[i] = (tmp << 4);
tmp = asc2nibble(*(arg+(2*i)+1));
if (tmp > 0x0F)
return 1;
cf->data[i] |= tmp;
}
return 0;
}
int parse_canframe(char *cs, struct can_frame *cf) {
/* documentation see lib.h */
int i, idx, dlc, len, tmp;
int i, idx, dlc, len;
unsigned char tmp;
len = strlen(cs);
//printf("'%s' len %d\n", cs, len);