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variable arg lists for xpath functions

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This commit is contained in:
Olof Hagsand 2016-12-18 09:27:42 +00:00
parent 8d21c7256a
commit 9a52cfecf6
2 changed files with 109 additions and 25 deletions
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128
lib/src/clixon_xsl.c
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@ -767,6 +767,26 @@ xpath_choice(cxobj *xtop,
return retval;
}
static cxobj *
xpath_first0(cxobj *cxtop,
char *xpath)
{
cxobj **vec0 = NULL;
size_t vec0len = 0;
cxobj *xn = NULL;
if (xpath_choice(cxtop, xpath, 0, &vec0, &vec0len) < 0)
goto done;
if (vec0len)
xn = vec0[0];
else
xn = NULL;
done:
if (vec0)
free(vec0);
return xn;
}
/*! A restricted xpath function where the first matching entry is returned
* See xpath1() on details for subset.
* args:
@ -785,24 +805,36 @@ xpath_choice(cxobj *xtop,
* @see also xpath_vec.
*/
cxobj *
xpath_first(cxobj *cxtop,
char *xpath)
xpath_first(cxobj *cxtop,
char *format,
...)
{
cxobj **vec0 = NULL;
size_t vec0len = 0;
cxobj *xn = NULL;
cxobj *retval = NULL;
va_list ap;
size_t len;
char *xpath;
if (xpath_choice(cxtop, xpath, 0, &vec0, &vec0len) < 0)
va_start(ap, format);
len = vsnprintf(NULL, 0, format, ap);
va_end(ap);
/* allocate a message string exactly fitting the message length */
if ((xpath = malloc(len+1)) == NULL){
clicon_err(OE_UNIX, errno, "malloc");
goto done;
if (vec0len)
xn = vec0[0];
else
xn = NULL;
done:
if (vec0)
free(vec0);
return xn;
}
/* second round: compute write message from reason and args */
va_start(ap, format);
if (vsnprintf(xpath, len+1, format, ap) < 0){
clicon_err(OE_UNIX, errno, "vsnprintf");
va_end(ap);
goto done;
}
va_end(ap);
retval = xpath_first0(cxtop, xpath);
done:
if (xpath)
free(xpath);
return retval;
}
/*! A restricted xpath iterator that loops over all matching entries. Dont use.
@ -888,13 +920,39 @@ xpath_each(cxobj *cxtop,
*/
int
xpath_vec(cxobj *cxtop,
char *xpath,
cxobj ***vec,
size_t *veclen)
char *format,
cxobj ***vec,
size_t *veclen,
...)
{
int retval = -1;
va_list ap;
size_t len;
char *xpath;
va_start(ap, veclen);
len = vsnprintf(NULL, 0, format, ap);
va_end(ap);
/* allocate a message string exactly fitting the message length */
if ((xpath = malloc(len+1)) == NULL){
clicon_err(OE_UNIX, errno, "malloc");
goto done;
}
/* second round: compute write message from reason and args */
va_start(ap, veclen);
if (vsnprintf(xpath, len+1, format, ap) < 0){
clicon_err(OE_UNIX, errno, "vsnprintf");
va_end(ap);
goto done;
}
va_end(ap);
*vec = NULL;
*veclen = 0;
return xpath_choice(cxtop, xpath, 0, vec, veclen);
retval = xpath_choice(cxtop, xpath, 0x0, vec, veclen);
done:
if (xpath)
free(xpath);
return retval;
}
/* A restricted xpath that returns a vector of matches (only nodes marked with flags)
@ -902,14 +960,40 @@ xpath_vec(cxobj *cxtop,
*/
int
xpath_vec_flag(cxobj *cxtop,
char *xpath,
char *format,
uint16_t flags,
cxobj ***vec,
size_t *veclen)
size_t *veclen,
...)
{
int retval = -1;
va_list ap;
size_t len;
char *xpath;
va_start(ap, veclen);
len = vsnprintf(NULL, 0, format, ap);
va_end(ap);
/* allocate a message string exactly fitting the message length */
if ((xpath = malloc(len+1)) == NULL){
clicon_err(OE_UNIX, errno, "malloc");
goto done;
}
/* second round: compute write message from reason and args */
va_start(ap, veclen);
if (vsnprintf(xpath, len+1, format, ap) < 0){
clicon_err(OE_UNIX, errno, "vsnprintf");
va_end(ap);
goto done;
}
va_end(ap);
*vec=NULL;
*veclen = 0;
return xpath_choice(cxtop, xpath, flags, vec, veclen);
retval = xpath_choice(cxtop, xpath, flags, vec, veclen);
done:
if (xpath)
free(xpath);
return retval;
}
/*