From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Fri, 30 Mar 2018 12:46:38 +0000 (+0300)
Subject: Added hex encoding for byte strings.
X-Git-Tag: 0.2.0~10
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=5ce4e0549311565c4fddfa04293c74b6316ee4cc;p=njs.git

Added hex encoding for byte strings.
---

diff --git a/njs/njs_string.c b/njs/njs_string.c
index af6d7d75..972cfab8 100644
--- a/njs/njs_string.c
+++ b/njs/njs_string.c
@@ -244,6 +244,37 @@ njs_string_alloc(njs_vm_t *vm, njs_value_t *value, uint32_t size,
 }
 
 
+nxt_noinline njs_ret_t
+njs_string_hex(njs_vm_t *vm, njs_value_t *value, const nxt_str_t *src)
+{
+    u_char        *p, c;
+    size_t        len;
+    nxt_uint_t    i;
+    const u_char  *start;
+
+    static const u_char  hex[16] = "0123456789abcdef";
+
+    len = src->length;
+    start = src->start;
+
+    p = njs_string_alloc(vm, value, len * 2, len * 2);
+
+    if (nxt_fast_path(p != NULL)) {
+        for (i = 0; i < len; i++) {
+            c = start[i];
+            *p++ = hex[c >> 4];
+            *p++ = hex[c & 0x0f];
+        }
+
+        return NXT_OK;
+    }
+
+    njs_memory_error(vm);
+
+    return NXT_ERROR;
+}
+
+
 void
 njs_string_copy(njs_value_t *dst, njs_value_t *src)
 {
diff --git a/njs/njs_string.h b/njs/njs_string.h
index 361b4504..0735d331 100644
--- a/njs/njs_string.h
+++ b/njs/njs_string.h
@@ -122,6 +122,8 @@ njs_string_length(njs_utf8_t utf8, u_char *start, size_t size)
 
 njs_ret_t njs_string_new(njs_vm_t *vm, njs_value_t *value, const u_char *start,
     uint32_t size, uint32_t length);
+njs_ret_t njs_string_hex(njs_vm_t *vm, njs_value_t *value,
+    const nxt_str_t *src);
 void njs_string_copy(njs_value_t *dst, njs_value_t *src);
 njs_ret_t njs_string_validate(njs_vm_t *vm, njs_string_prop_t *string,
     njs_value_t *value);