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-rw-r--r--mandoc.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/mandoc.c b/mandoc.c
index b9d554af..1099ca4d 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -14,6 +14,10 @@
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#if defined(__linux__) || defined(__MINT__)
+# define _GNU_SOURCE /* strptime() */
+#endif
+
#include <sys/types.h>
#include <assert.h>
@@ -21,9 +25,13 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <time.h>
#include "libmandoc.h"
+static int a2time(time_t *, const char *, const char *);
+
+
int
mandoc_special(const char *p)
{
@@ -163,3 +171,57 @@ mandoc_strdup(const char *ptr)
return(p);
}
+
+
+static int
+a2time(time_t *t, const char *fmt, const char *p)
+{
+ struct tm tm;
+ char *pp;
+
+ memset(&tm, 0, sizeof(struct tm));
+
+ pp = strptime(p, fmt, &tm);
+ if (NULL != pp && '\0' == *pp) {
+ *t = mktime(&tm);
+ return(1);
+ }
+
+ return(0);
+}
+
+
+/*
+ * Convert from a manual date string (see mdoc(7) and man(7)) into a
+ * date according to the stipulated date type.
+ */
+time_t
+mandoc_a2time(int flags, const char *p)
+{
+ time_t t;
+
+ if (MTIME_MDOCDATE & flags) {
+ if (0 == strcmp(p, "$" "Mdocdate$"))
+ return(time(NULL));
+ if (a2time(&t, "$" "Mdocdate: %b %d %Y $", p))
+ return(t);
+ }
+
+ if (MTIME_CANONICAL & flags || MTIME_REDUCED & flags)
+ if (a2time(&t, "%b %d, %Y", p))
+ return(t);
+
+ if (MTIME_ISO_8601 & flags)
+ if (a2time(&t, "%Y-%m-%d", p))
+ return(t);
+
+ if (MTIME_REDUCED & flags) {
+ if (a2time(&t, "%d, %Y", p))
+ return(t);
+ if (a2time(&t, "%Y", p))
+ return(t);
+ }
+
+ return(0);
+}
+