common NEW lysp_check_date function
diff --git a/src/common.c b/src/common.c
index ab47b65..dbb5dc9 100644
--- a/src/common.c
+++ b/src/common.c
@@ -11,8 +11,15 @@
*
* https://opensource.org/licenses/BSD-3-Clause
*/
+#define _XOPEN_SOURCE
#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <time.h>
+
+#include "tree_schema.h"
void *
ly_realloc(void *ptr, size_t size)
@@ -26,3 +33,46 @@
return new_mem;
}
+
+int
+lysp_check_date(struct ly_ctx *ctx, const char *date, int date_len)
+{
+ int i;
+ struct tm tm, tm_;
+ char *r;
+
+ if (date_len != LY_REV_SIZE - 1) {
+ goto error;
+ }
+
+ /* check format */
+ for (i = 0; i < date_len; i++) {
+ if (i == 4 || i == 7) {
+ if (date[i] != '-') {
+ goto error;
+ }
+ } else if (!isdigit(date[i])) {
+ goto error;
+ }
+ }
+
+ /* check content, e.g. 2018-02-31 */
+ memset(&tm, 0, sizeof tm);
+ r = strptime(date, "%Y-%m-%d", &tm);
+ if (!r || r != &date[LY_REV_SIZE - 1]) {
+ goto error;
+ }
+ memcpy(&tm_, &tm, sizeof tm);
+ mktime(&tm_); /* mktime modifies tm_ if it refers invalid date */
+ if (tm.tm_mday != tm_.tm_mday) { /* e.g 2018-02-29 -> 2018-03-01 */
+ /* checking days is enough, since other errors
+ * have been checked by strptime() */
+ goto error;
+ }
+
+ return 0;
+
+error:
+ fprintf(stderr, "Invalid date format \"%*.s\".\n", date_len, date);
+ return -1;
+}
diff --git a/src/common.h b/src/common.h
index e6cf5e5..7e7801a 100644
--- a/src/common.h
+++ b/src/common.h
@@ -109,6 +109,8 @@
*/
void *ly_realloc(void *ptr, size_t size);
+int lysp_check_date(struct ly_ctx *ctx, const char *date, int date_len);
+
/*
* Macros to work with lysp structures arrays.
*