diff options
Diffstat (limited to 'ext/cgi')
| -rw-r--r-- | ext/cgi/escape/escape.c | 97 | ||||
| -rw-r--r-- | ext/cgi/escape/extconf.rb | 3 |
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 0000000000..6fec95af04 --- /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, "'"); + break; + case '&': + rb_str_cat_cstr(str, "&"); + break; + case '"': + rb_str_cat_cstr(str, """); + break; + case '<': + rb_str_cat_cstr(str, "<"); + break; + case '>': + rb_str_cat_cstr(str, ">"); + 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 0000000000..16e8ff224d --- /dev/null +++ b/ext/cgi/escape/extconf.rb @@ -0,0 +1,3 @@ +require 'mkmf' + +create_makefile 'cgi/escape' |