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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2015-12-20 11:54:54 +0000
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2015-12-20 11:54:54 +0000
commitce7f7f5e3d6c288b140870fa87c4b11e9a744f62 (patch)
tree54ca2134480577b0aa5c5001b1657d5fc4adfaf4 /ext/cgi
parent28dc41090aaaf6f43a29c1b6fd4f49192540c256 (diff)
cgi/escape: Optimize CGI.escapeHTML
* cgi/escape/escape.c: Optimize CGI.escapeHTML for ASCII-compatible encodings. [Fix GH-1164] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53220 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/cgi')
-rw-r--r--ext/cgi/escape/escape.c97
-rw-r--r--ext/cgi/escape/extconf.rb3
2 files changed, 100 insertions, 0 deletions
diff --git a/ext/cgi/escape/escape.c b/ext/cgi/escape/escape.c
new file mode 100644
index 0000000..6fec95a
--- /dev/null
+++ b/ext/cgi/escape/escape.c
@@ -0,0 +1,97 @@
+#include "ruby.h"
+#include "ruby/encoding.h"
+
+static VALUE rb_cCGI, rb_mUtil, rb_mEscape;
+
+static void
+html_escaped_cat(VALUE str, char c)
+{
+ switch (c) {
+ case '\'':
+ rb_str_cat_cstr(str, "&#39;");
+ break;
+ case '&':
+ rb_str_cat_cstr(str, "&amp;");
+ break;
+ case '"':
+ rb_str_cat_cstr(str, "&quot;");
+ break;
+ case '<':
+ rb_str_cat_cstr(str, "&lt;");
+ break;
+ case '>':
+ rb_str_cat_cstr(str, "&gt;");
+ break;
+ }
+}
+
+static VALUE
+optimized_escape_html(VALUE str)
+{
+ long i, len, modified = 0, beg = 0;
+ VALUE dest;
+ const char *cstr;
+
+ len = RSTRING_LEN(str);
+ cstr = RSTRING_PTR(str);
+
+ for (i = 0; i < len; i++) {
+ switch (cstr[i]) {
+ case '\'':
+ case '&':
+ case '"':
+ case '<':
+ case '>':
+ if (!modified) {
+ modified = 1;
+ dest = rb_str_buf_new(len);
+ }
+
+ rb_str_cat(dest, cstr + beg, i - beg);
+ beg = i + 1;
+
+ html_escaped_cat(dest, cstr[i]);
+ break;
+ }
+ }
+
+ if (modified) {
+ rb_str_cat(dest, cstr + beg, len - beg);
+ rb_enc_associate(dest, rb_enc_get(str));
+ return dest;
+ }
+ else {
+ return str;
+ }
+}
+
+/*
+ * call-seq:
+ * CGI.escapeHTML(string) -> string
+ *
+ * Returns HTML-escaped string.
+ *
+ */
+static VALUE
+cgiesc_escape_html(VALUE self, VALUE str)
+{
+ StringValue(str);
+
+ if (rb_enc_str_asciicompat_p(str)) {
+ return optimized_escape_html(str);
+ }
+ else {
+ return rb_call_super(1, &str);
+ }
+}
+
+void
+Init_escape(void)
+{
+ rb_cCGI = rb_define_class("CGI", rb_cObject);
+ rb_mEscape = rb_define_module_under(rb_cCGI, "Escape");
+ rb_mUtil = rb_define_module_under(rb_cCGI, "Util");
+ rb_define_method(rb_mEscape, "escapeHTML", cgiesc_escape_html, 1);
+ rb_prepend_module(rb_mUtil, rb_mEscape);
+ rb_extend_object(rb_cCGI, rb_mEscape);
+}
diff --git a/ext/cgi/escape/extconf.rb b/ext/cgi/escape/extconf.rb
new file mode 100644
index 0000000..16e8ff2
--- /dev/null
+++ b/ext/cgi/escape/extconf.rb
@@ -0,0 +1,3 @@
+require 'mkmf'
+
+create_makefile 'cgi/escape'