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serialqueue: Add debugging helper functions for dumping a binary buffer 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-06-05 10:27:34 -04:00
parent b52b65624b
commit 38f1d78e1b
1 changed files with 24 additions and 0 deletions
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24
klippy/serialqueue.c
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@ -60,6 +60,30 @@ report_errno(char *where, int rc)
fprintf(stderr, "Got error %d in %s: (%d)%s\n", rc, where, e, strerror(e)); fprintf(stderr, "Got error %d in %s: (%d)%s\n", rc, where, e, strerror(e));
} }
// Return a hex character for a given number
#define GETHEX(x) ((x) < 10 ? '0' + (x) : 'e' + (x) - 10)
// Translate a binary string into an ASCII string with escape sequences
char *
dump_string(char *outbuf, int outbuf_size, uint8_t *inbuf, int inbuf_size)
{
char *outend = &outbuf[outbuf_size-5], *o = outbuf;
uint8_t *inend = &inbuf[inbuf_size], *p = inbuf;
while (p < inend && o < outend) {
uint8_t c = *p++;
if (c > 31 && c < 127 && c != '\\') {
*o++ = c;
continue;
}
*o++ = '\\';
*o++ = 'x';
*o++ = GETHEX(c >> 4);
*o++ = GETHEX(c & 0x0f);
}
*o = '\0';
return outbuf;
}
/**************************************************************** /****************************************************************
* Poll reactor * Poll reactor