Update Lexbor (#14729)

Author: nielsdos

ext/dom/lexbor/lexbor/core/diyfp.h

@@ -71,7 +71,7 @@ lexbor_cached_power_bin(int exp, int *dec_exp);
 /*
  * Inline functions
  */
-#if (LEXBOR_HAVE_BUILTIN_CLZLL)
+#ifdef LEXBOR_HAVE_BUILTIN_CLZLL
 #define nxt_leading_zeros64(x)  (((x) == 0) ? 64 : __builtin_clzll(x))
 
 #else
@@ -199,7 +199,7 @@ lexbor_diyfp_sub(lexbor_diyfp_t lhs, lexbor_diyfp_t rhs)
 lxb_inline lexbor_diyfp_t
 lexbor_diyfp_mul(lexbor_diyfp_t lhs, lexbor_diyfp_t rhs)
 {
-#if (LEXBOR_HAVE_UNSIGNED_INT128)
+#ifdef LEXBOR_HAVE_UNSIGNED_INT128
 
     uint64_t l, h;
     lxb_uint128_t u128;

ext/dom/lexbor/lexbor/core/perf.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Alexander Borisov
+ * Copyright (C) 2018-2024 Alexander Borisov
  *
  * Author: Alexander Borisov <[email protected]>
  */
@@ -14,9 +14,6 @@ extern "C" {
 #include "lexbor/core/base.h"
 
 
-#ifdef LEXBOR_WITH_PERF
-
-
 LXB_API void *
 lexbor_perf_create(void);
 
@@ -36,8 +33,6 @@ LXB_API double
 lexbor_perf_in_sec(void *perf);
 
 
-#endif /* LEXBOR_WITH_PERF */
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

ext/dom/lexbor/lexbor/core/swar.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2024 Alexander Borisov
+ *
+ * Author: Niels Dossche <[email protected]>
+ */
+
+#ifndef LEXBOR_SWAR_H
+#define LEXBOR_SWAR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#include "lexbor/core/base.h"
+
+
+/* 
+ * Based on techniques from https://graphics.stanford.edu/~seander/bithacks.html
+ */
+#define LEXBOR_SWAR_ONES (~((size_t) 0) / 0xFF)
+#define LEXBOR_SWAR_REPEAT(x) (LEXBOR_SWAR_ONES * (x))
+#define LEXBOR_SWAR_HAS_ZERO(v) (((v) - LEXBOR_SWAR_ONES) & ~(v) & LEXBOR_SWAR_REPEAT(0x80))
+#define LEXBOR_SWAR_IS_LITTLE_ENDIAN (*(unsigned char *) &(uint16_t){1})
+
+
+/*
+ * When handling hot loops that search for a set of characters,
+ * this function can be used to quickly move the data pointer much
+ * closer to the first occurrence of such a character.
+ */
+lxb_inline const lxb_char_t *
+lexbor_swar_seek4(const lxb_char_t *data, const lxb_char_t *end,
+                  lxb_char_t c1, lxb_char_t c2, lxb_char_t c3, lxb_char_t c4)
+{
+    size_t bytes, matches, t1, t2, t3, t4;
+
+    if (LEXBOR_SWAR_IS_LITTLE_ENDIAN) {
+        while (data + sizeof(size_t) <= end) {
+            memcpy(&bytes, data, sizeof(size_t));
+
+            t1 = bytes ^ LEXBOR_SWAR_REPEAT(c1);
+            t2 = bytes ^ LEXBOR_SWAR_REPEAT(c2);
+            t3 = bytes ^ LEXBOR_SWAR_REPEAT(c3);
+            t4 = bytes ^ LEXBOR_SWAR_REPEAT(c4);
+            matches =   LEXBOR_SWAR_HAS_ZERO(t1) | LEXBOR_SWAR_HAS_ZERO(t2)
+                      | LEXBOR_SWAR_HAS_ZERO(t3) | LEXBOR_SWAR_HAS_ZERO(t4);
+
+            if (matches) {
+                data += ((((matches - 1) & LEXBOR_SWAR_ONES) * LEXBOR_SWAR_ONES)
+                        >> (sizeof(size_t) * 8 - 8)) - 1;
+                break;
+            } else {
+                data += sizeof(size_t);
+            }
+        }
+    }
+
+    return data;
+}
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* LEXBOR_SWAR_H */
+

ext/dom/lexbor/lexbor/css/parser.c

@@ -62,6 +62,16 @@ lxb_css_parser_init(lxb_css_parser_t *parser, lxb_css_syntax_tokenizer_t *tkz)
     parser->rules_end = parser->rules_begin + lxb_rules_length;
     parser->rules = parser->rules_begin;
 
+    /*
+     * Zero those parameters that can be used (passed to the function).
+     * The parser->rules->phase parameter will be assigned at the end of the
+     * parsing.
+     *
+     * The point is that parser->rules[0] is used as a stub before exiting
+     * parsing.
+     */
+    parser->rules->context = NULL;
+
     /* Temp */
     parser->pos = NULL;
     parser->str.length = 0;

ext/dom/lexbor/lexbor/html/encoding.c

@@ -477,6 +477,8 @@ lxb_html_get_attribute(const lxb_char_t *data, const lxb_char_t *end,
         data++;
     }
 
+    *name_end = data;
+
 spaces_state:
 
     data = lxb_html_encoding_skip_spaces(data, end);

ext/dom/lexbor/lexbor/html/tokenizer/state.c

@@ -15,6 +15,7 @@
 #define LEXBOR_STR_RES_MAP_HEX
 #define LEXBOR_STR_RES_MAP_NUM
 #include "lexbor/core/str_res.h"
+#include "lexbor/core/swar.h"
 
 #define LXB_HTML_TOKENIZER_RES_ENTITIES_SBST
 #include "lexbor/html/tokenizer/res.h"
@@ -226,6 +227,8 @@ lxb_html_tokenizer_state_data(lxb_html_tokenizer_t *tkz,
 {
     lxb_html_tokenizer_state_begin_set(tkz, data);
 
+    data = lexbor_swar_seek4(data, end, 0x3C, 0x26, 0x0D, 0x00);
+
     while (data != end) {
         switch (*data) {
             /* U+003C LESS-THAN SIGN (<) */
@@ -906,6 +909,8 @@ lxb_html_tokenizer_state_attribute_value_double_quoted(lxb_html_tokenizer_t *tkz
 
     lxb_html_tokenizer_state_begin_set(tkz, data);
 
+    data = lexbor_swar_seek4(data, end, 0x22, 0x26, 0x0D, 0x00);
+
     while (data != end) {
         switch (*data) {
             /* U+0022 QUOTATION MARK (") */

ext/dom/lexbor/lexbor/html/tree/insertion_mode/in_head.c

@@ -175,7 +175,7 @@ lxb_html_tree_insertion_mode_in_head_open(lxb_html_tree_t *tree,
          * We can create function for this, but...
          *
          * The "in head noscript" insertion mode use this
-         * is you change this code, please, change it in in head noscript" mode
+         * is you change this code, please, change it in head noscript" mode
          */
         case LXB_TAG__TEXT: {
             lxb_html_token_t ws_token = {0};