1 files changed, 92 insertions, 0 deletions

diff --git a/functions20.h b/functions20.h
new file mode 100644
index 0000000..9ff3a63
--- /dev/null
+++ b/functions20.h
@@ -0,0 +1,92 @@
+/* functions */
+static const char *extract_request_time_custom(request_rec *r, char *a,
+                                           apr_time_exp_t *xt)
+{
+    apr_size_t retcode;
+    char tstr[MAX_STRING_LEN];
+    apr_strftime(tstr, &retcode, sizeof(tstr), a, xt);
+    return apr_pstrdup(r->pool, tstr);
+}
+
+#define DEFAULT_REQUEST_TIME_SIZE 32
+typedef struct {
+    unsigned t;
+    char timestr[DEFAULT_REQUEST_TIME_SIZE];
+    unsigned t_validate;
+} cached_request_time;
+
+#define TIME_CACHE_SIZE 4
+#define TIME_CACHE_MASK 3
+static cached_request_time request_time_cache[TIME_CACHE_SIZE];
+
+static const char *extract_request_time(request_rec *r, char *a)
+{
+        apr_time_exp_t xt;
+
+        /* Please read comments in mod_log_config.h for more info about
+         * the I_INSIST....COMPLIANCE define
+         */
+        if (a && *a) {     /* Custom format */
+#ifdef I_INSIST_ON_EXTRA_CYCLES_FOR_CLF_COMPLIANCE
+        ap_explode_recent_localtime(&xt, apr_time_now());
+#else
+        ap_explode_recent_localtime(&xt, r->request_time);
+#endif
+        return extract_request_time_custom(r, a, &xt);
+        } else {                   /* CLF format */
+        /* This code uses the same technique as ap_explode_recent_localtime():
+         * optimistic caching with logic to detect and correct race conditions.
+         * See the comments in server/util_time.c for more information.
+         */
+        cached_request_time* cached_time = apr_palloc(r->pool,
+                                                      sizeof(*cached_time));
+#ifdef I_INSIST_ON_EXTRA_CYCLES_FOR_CLF_COMPLIANCE
+        apr_time_t request_time = apr_time_now();
+#else
+        apr_time_t request_time = r->request_time;
+#endif
+        unsigned t_seconds = (unsigned)apr_time_sec(request_time);
+        unsigned i = t_seconds & TIME_CACHE_MASK;
+        memcpy(cached_time, &(request_time_cache[i]), sizeof(*cached_time));
+        if ((t_seconds != cached_time->t) ||
+            (t_seconds != cached_time->t_validate)) {
+
+            /* Invalid or old snapshot, so compute the proper time string
+             * and store it in the cache
+             */
+            char sign;
+            int timz;
+
+            ap_explode_recent_localtime(&xt, r->request_time);
+            timz = xt.tm_gmtoff;
+            if (timz < 0) {
+                timz = -timz;
+                sign = '-';
+            }
+            else {
+                sign = '+';
+            }
+            cached_time->t = t_seconds;
+            apr_snprintf(cached_time->timestr, DEFAULT_REQUEST_TIME_SIZE,
+                         "[%02d/%s/%d:%02d:%02d:%02d %c%.2d%.2d]",
+                         xt.tm_mday, apr_month_snames[xt.tm_mon],
+                         xt.tm_year+1900, xt.tm_hour, xt.tm_min, xt.tm_sec,
+                         sign, timz / (60*60), timz % (60*60));
+            cached_time->t_validate = t_seconds;
+            memcpy(&(request_time_cache[i]), cached_time,
+                   sizeof(*cached_time));
+                }
+                return cached_time->timestr;
+        }
+}
+
+static const char *extract_request_duration(request_rec *r, char *a)
+{
+        apr_time_t duration = apr_time_now() - r->request_time;
+        return apr_psprintf(r->pool, "%" APR_TIME_T_FMT, apr_time_sec(duration));
+}
+
+static const char *extract_request_timestamp(request_rec *r, char *a)
+{
+        return apr_psprintf(r->pool, "%"APR_TIME_T_FMT, apr_time_sec(apr_time_now()));
+}