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signal: add support for name-based signal mapping

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This commit is contained in:
Steffen Vogel 2018-03-26 14:08:26 +02:00
parent fdf4a9c251
commit b1046ff641
3 changed files with 30 additions and 10 deletions
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3
include/villas/signal.h
View file

@ -27,6 +27,7 @@
/* Forward declarations */
struct list;
struct node;
struct signal {
char *name; /**< The name of the signal. */
@ -41,3 +42,5 @@ int signal_destroy(struct signal *s);
int signal_parse(struct signal *s, json_t *cfg);
int signal_parse_list(struct list *list, json_t *cfg);
int signal_get_offset(const char *str, struct node *n);

15
lib/mapping.c
View file

@ -28,6 +28,7 @@
#include <villas/list.h>
#include <villas/utils.h>
#include <villas/node.h>
#include <villas/signal.h>
int mapping_parse_str(struct mapping_entry *me, const char *str, struct list *nodes)
{
@ -131,7 +132,7 @@ int mapping_parse_str(struct mapping_entry *me, const char *str, struct list *no
goto invalid_format;
}
else if (!strcmp(type, "data")) {
char *first_str, *last_str, *endptr;
char *first_str, *last_str;
me->type = MAPPING_TYPE_DATA;
@ -143,15 +144,9 @@ int mapping_parse_str(struct mapping_entry *me, const char *str, struct list *no
if (!last_str)
last_str = first_str; /* single element: data[5] => data[5-5] */
first = strtoul(first_str, &endptr, 10);
if (endptr != first_str + strlen(first_str))
goto invalid_format;
last = strtoul(last_str, &endptr, 10);
if (endptr != last_str + strlen(last_str))
goto invalid_format;
if (last < first)
first = signal_get_offset(first_str, me->node);
last = signal_get_offset(last_str, me->node);
if (first < 0 || last < 0 || last < first)
goto invalid_format;
me->data.offset = first;

22
lib/signal.c
View file

@ -25,6 +25,7 @@
#include "villas/signal.h"
#include "villas/list.h"
#include "villas/utils.h"
#include "villas/node.h"
int signal_destroy(struct signal *s)
{
@ -72,3 +73,24 @@ int signal_parse_list(struct list *list, json_t *cfg)
return 0;
}
int signal_get_offset(const char *str, struct node *n)
{
int idx;
char *endptr;
struct signal *s;
/* Lets try to find a signal with a matching name */
if (n) {
s = list_lookup(&n->signals, str);
if (s)
return list_index(&n->signals, s);
}
/* Lets try to interpret the signal name as an index */
idx = strtoul(str, &endptr, 10);
if (endptr == str + strlen(str))
return idx;
return -1;
}