// For DM_ARRAY_SIZE!
#include "libdevmapper.h"
+#include <ctype.h>
#include <stdlib.h>
+#include <string.h>
//----------------------------------------------------------------
-static const char *_tok_cpy(const char *b, const char *e, const char *str)
+static char *_tok_cpy(const char *b, const char *e)
{
char *new = malloc((e - b) + 1);
char *ptr = new;
return !*str;
}
-static bool _parse_operating_mode(const char *b, const char *e,
- enum vdo_operating_mode *r)
+static bool _parse_operating_mode(const char *b, const char *e, void *context)
{
static struct {
const char *str;
{"normal", VDO_MODE_NORMAL}
};
+ enum vdo_operating_mode *r = context;
unsigned i;
for (i = 0; i < DM_ARRAY_SIZE(_table); i++) {
if (_tok_eq(b, e, _table[i].str)) {
return false;
}
-static bool _parse_compression_state(const char *b, const char *e,
- enum vdo_compression_state *r)
+static bool _parse_compression_state(const char *b, const char *e, void *context)
{
static struct {
const char *str;
{"offline", VDO_COMPRESSION_OFFLINE}
};
+ enum vdo_compression_state *r = context;
unsigned i;
for (i = 0; i < DM_ARRAY_SIZE(_table); i++) {
if (_tok_eq(b, e, _table[i].str)) {
return false;
}
-static bool _parse_recovering(const char *b, const char *e, bool *r)
+static bool _parse_recovering(const char *b, const char *e, void *context)
{
+ bool *r = context;
+
if (_tok_eq(b, e, "recovering"))
*r = true;
return true;
}
-static bool _parse_index_state(const char *b, const char *e,
- enum vdo_index_state *r)
+static bool _parse_index_state(const char *b, const char *e, void *context)
{
static struct {
const char *str;
{"unknown", VDO_INDEX_UNKNOWN}
};
+ enum vdo_index_state *r = context;
unsigned i;
for (i = 0; i < DM_ARRAY_SIZE(_table); i++) {
if (_tok_eq(b, e, _table[i].str)) {
return false;
}
+static bool _parse_uint64(const char *b, const char *e, void *context)
+{
+ uint64_t *r = context, n;
+
+ n = 0;
+ while (b != e) {
+ if (!isdigit(*b))
+ return false;
+
+ n = (n << 1) + (*b - '0');
+ b++;
+ }
+
+ *r = n;
+ return true;
+}
+
static const char *_eat_space(const char *b, const char *e)
{
while (b != e && isspace(*b))
return b == e ? NULL : b;
}
+static void _set_error(struct parse_result *result, const char *fmt, ...)
+ __attribute__ ((format(printf, 2, 3)));
+
+static void _set_error(struct parse_result *result, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(result->error, sizeof(result->error), fmt, ap);
+ va_end(ap);
+}
+
static bool _parse_field(const char **b, const char *e,
- bool (*p_fn)(const char *, const char *, void *)
+ bool (*p_fn)(const char *, const char *, void *),
void *field, const char *field_name,
struct parse_result *result)
{
te = _next_tok(*b, e);
if (!te) {
- snprintf(result->error, sizeof(result->error),
- "couldn't get token for '%s'", field_name);
+ _set_error(result, "couldn't get token for '%s'", field_name);
return false;
}
- if (!p_fn(*b, te, field) {
- snprintf(result->error, sizeof(result->error),
- "couldn't parse '%s'", field_name);
+ if (!p_fn(*b, te, field)) {
+ _set_error(result, "couldn't parse '%s'", field_name);
return false;
}
- *b = _eat_space(te);
+ *b = _eat_space(te, e);
return true;
}
bool parse_vdo_status(const char *input, struct parse_result *result)
{
- const char *b = _eat_space(input);
+ const char *b = b = input;
const char *e = input + strlen(input);
const char *te;
struct vdo_status *s = malloc(sizeof(*s));
if (!s) {
- result->error = "out of memory";
+ _set_error(result, "out of memory");
return false;
}
+ b = _eat_space(b, e);
te = _next_tok(b, e);
if (!te) {
- result->error = "couldn't get token for device";
+ _set_error(result, "couldn't get token for device");
free(s);
return false;
}
s->device = _tok_cpy(b, te);
if (!s->device) {
- result->error = "out of memory";
+ _set_error(result, "out of memory");
free(s);
return false;
}
- b = _eat_space(te);
+ b = _eat_space(te, e);
#define XX(p, f, fn) if (!_parse_field(&b, e, p, f, fn, result)) goto bad;
+ XX(_parse_operating_mode, &s->operating_mode, "operating mode");
XX(_parse_recovering, &s->recovering, "recovering");
- XX(_parse_index, &s->index_state, "index state");
+ XX(_parse_index_state, &s->index_state, "index state");
XX(_parse_compression_state, &s->compression_state, "compression state");
XX(_parse_uint64, &s->used_blocks, "used blocks");
XX(_parse_uint64, &s->total_blocks, "total blocks");