[nginx] Added the ngx_http_test_required_predicates() function.

[Vladimir Homutov]

details:   https://hg.nginx.org/nginx/rev/5efc23d83bc2
branches:  
changeset: 7439:5efc23d83bc2
user:      Vladimir Homutov <vl at nginx.com>
date:      Thu Jan 17 14:31:04 2019 +0300
description:
Added the ngx_http_test_required_predicates() function.

In contrast to ngx_http_test_predicates(), it requires all values to be
non-empty and not equal to "0".

diffstat:

 src/http/ngx_http_script.c |  28 ++++++++++++++++++++++++++++
 src/http/ngx_http_script.h |   2 ++
 2 files changed, 30 insertions(+), 0 deletions(-)

diffs (50 lines):

diff -r 134343f2a877 -r 5efc23d83bc2 src/http/ngx_http_script.c
--- a/src/http/ngx_http_script.c	Thu Jan 17 14:31:01 2019 +0300
+++ b/src/http/ngx_http_script.c	Thu Jan 17 14:31:04 2019 +0300
@@ -271,6 +271,34 @@ ngx_http_test_predicates(ngx_http_reques
 }
 
 
+ngx_int_t
+ngx_http_test_required_predicates(ngx_http_request_t *r,
+    ngx_array_t *predicates)
+{
+    ngx_str_t                  val;
+    ngx_uint_t                 i;
+    ngx_http_complex_value_t  *cv;
+
+    if (predicates == NULL) {
+        return NGX_OK;
+    }
+
+    cv = predicates->elts;
+
+    for (i = 0; i < predicates->nelts; i++) {
+        if (ngx_http_complex_value(r, &cv[i], &val) != NGX_OK) {
+            return NGX_ERROR;
+        }
+
+        if (val.len == 0 || (val.len == 1 && val.data[0] == '0')) {
+            return NGX_DECLINED;
+        }
+    }
+
+    return NGX_OK;
+}
+
+
 char *
 ngx_http_set_predicate_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 {
diff -r 134343f2a877 -r 5efc23d83bc2 src/http/ngx_http_script.h
--- a/src/http/ngx_http_script.h	Thu Jan 17 14:31:01 2019 +0300
+++ b/src/http/ngx_http_script.h	Thu Jan 17 14:31:04 2019 +0300
@@ -214,6 +214,8 @@ char *ngx_http_set_complex_value_slot(ng
 
 ngx_int_t ngx_http_test_predicates(ngx_http_request_t *r,
     ngx_array_t *predicates);
+ngx_int_t ngx_http_test_required_predicates(ngx_http_request_t *r,
+    ngx_array_t *predicates);
 char *ngx_http_set_predicate_slot(ngx_conf_t *cf, ngx_command_t *cmd,
     void *conf);