From 6229138d80380d582f16931d36b279807dcb82dd Mon Sep 17 00:00:00 2001 From: Arseny Kapoulkine Date: Mon, 27 Oct 2014 22:29:14 -0700 Subject: Optimize node printing by using raw pointers This lets us do fewer null pointer checks (making printing 2% faster with -O3) and removes a lot of function calls (making printing 20% faster with -O0). --- src/pugixml.cpp | 81 ++++++++++++++++++++++++++++++--------------------------- 1 file changed, 42 insertions(+), 39 deletions(-) (limited to 'src') diff --git a/src/pugixml.cpp b/src/pugixml.cpp index f0bfc31..13ed4b8 100644 --- a/src/pugixml.cpp +++ b/src/pugixml.cpp @@ -3452,36 +3452,37 @@ PUGI__NS_BEGIN writer.write('-', '-', '>'); } - PUGI__FN void node_output_attributes(xml_buffered_writer& writer, const xml_node node, unsigned int flags) + PUGI__FN void node_output_attributes(xml_buffered_writer& writer, xml_node_struct* node, unsigned int flags) { const char_t* default_name = PUGIXML_TEXT(":anonymous"); - for (xml_attribute a = node.first_attribute(); a; a = a.next_attribute()) + for (xml_attribute_struct* a = node->first_attribute; a; a = a->next_attribute) { writer.write(' '); - writer.write_string(a.name()[0] ? a.name() : default_name); + writer.write_string(a->name ? a->name : default_name); writer.write('=', '"'); - text_output(writer, a.value(), ctx_special_attr, flags); + if (a->value) + text_output(writer, a->value, ctx_special_attr, flags); writer.write('"'); } } - PUGI__FN bool node_output_start(xml_buffered_writer& writer, const xml_node node, unsigned int flags) + PUGI__FN bool node_output_start(xml_buffered_writer& writer, xml_node_struct* node, unsigned int flags) { const char_t* default_name = PUGIXML_TEXT(":anonymous"); - const char_t* name = node.name()[0] ? node.name() : default_name; + const char_t* name = node->name ? node->name : default_name; writer.write('<'); writer.write_string(name); - if (node.first_attribute()) + if (node->first_attribute) node_output_attributes(writer, node, flags); if (flags & format_raw) { - if (!node.first_child()) + if (!node->first_child) writer.write(' ', '/', '>'); else { @@ -3492,18 +3493,20 @@ PUGI__NS_BEGIN } else { - xml_node first = node.first_child(); + xml_node_struct* first = node->first_child; if (!first) writer.write(' ', '/', '>', '\n'); - else if (!first.next_sibling() && (first.type() == node_pcdata || first.type() == node_cdata)) + else if (!first->next_sibling && (PUGI__NODETYPE(first) == node_pcdata || PUGI__NODETYPE(first) == node_cdata)) { writer.write('>'); - if (first.type() == node_pcdata) - text_output(writer, first.value(), ctx_special_pcdata, flags); + const char_t* value = first->value ? first->value : PUGIXML_TEXT(""); + + if (PUGI__NODETYPE(first) == node_pcdata) + text_output(writer, value, ctx_special_pcdata, flags); else - text_output_cdata(writer, first.value()); + text_output_cdata(writer, value); writer.write('<', '/'); writer.write_string(name); @@ -3520,10 +3523,10 @@ PUGI__NS_BEGIN return false; } - PUGI__FN void node_output_end(xml_buffered_writer& writer, const xml_node node, unsigned int flags) + PUGI__FN void node_output_end(xml_buffered_writer& writer, xml_node_struct* node, unsigned int flags) { const char_t* default_name = PUGIXML_TEXT(":anonymous"); - const char_t* name = node.name()[0] ? node.name() : default_name; + const char_t* name = node->name ? node->name : default_name; writer.write('<', '/'); writer.write_string(name); @@ -3534,35 +3537,35 @@ PUGI__NS_BEGIN writer.write('>', '\n'); } - PUGI__FN void node_output_simple(xml_buffered_writer& writer, const xml_node node, unsigned int flags) + PUGI__FN void node_output_simple(xml_buffered_writer& writer, xml_node_struct* node, unsigned int flags) { const char_t* default_name = PUGIXML_TEXT(":anonymous"); - switch (node.type()) + switch (PUGI__NODETYPE(node)) { case node_pcdata: - text_output(writer, node.value(), ctx_special_pcdata, flags); + text_output(writer, node->value ? node->value : PUGIXML_TEXT(""), ctx_special_pcdata, flags); if ((flags & format_raw) == 0) writer.write('\n'); break; case node_cdata: - text_output_cdata(writer, node.value()); + text_output_cdata(writer, node->value ? node->value : PUGIXML_TEXT("")); if ((flags & format_raw) == 0) writer.write('\n'); break; case node_comment: - node_output_comment(writer, node.value()); + node_output_comment(writer, node->value ? node->value : PUGIXML_TEXT("")); if ((flags & format_raw) == 0) writer.write('\n'); break; case node_pi: writer.write('<', '?'); - writer.write_string(node.name()[0] ? node.name() : default_name); + writer.write_string(node->name ? node->name : default_name); - if (node.value()[0]) + if (node->value) { writer.write(' '); - writer.write_string(node.value()); + writer.write_string(node->value); } writer.write('?', '>'); @@ -3571,7 +3574,7 @@ PUGI__NS_BEGIN case node_declaration: writer.write('<', '?'); - writer.write_string(node.name()[0] ? node.name() : default_name); + writer.write_string(node->name ? node->name : default_name); node_output_attributes(writer, node, flags); writer.write('?', '>'); if ((flags & format_raw) == 0) writer.write('\n'); @@ -3581,10 +3584,10 @@ PUGI__NS_BEGIN writer.write('<', '!', 'D', 'O', 'C'); writer.write('T', 'Y', 'P', 'E'); - if (node.value()[0]) + if (node->value) { writer.write(' '); - writer.write_string(node.value()); + writer.write_string(node->value); } writer.write('>'); @@ -3596,11 +3599,11 @@ PUGI__NS_BEGIN } } - PUGI__FN void node_output(xml_buffered_writer& writer, const xml_node root, const char_t* indent, unsigned int flags, unsigned int depth) + PUGI__FN void node_output(xml_buffered_writer& writer, xml_node_struct* root, const char_t* indent, unsigned int flags, unsigned int depth) { size_t indent_length = ((flags & (format_indent | format_raw)) == format_indent) ? strlength(indent) : 0; - xml_node node = root; + xml_node_struct* node = root; do { @@ -3610,20 +3613,20 @@ PUGI__NS_BEGIN if (indent_length) text_output_indent(writer, indent, indent_length, depth); - if (node.type() == node_element) + if (PUGI__NODETYPE(node) == node_element) { if (node_output_start(writer, node, flags)) { - node = node.first_child(); + node = node->first_child; depth++; continue; } } - else if (node.type() == node_document) + else if (PUGI__NODETYPE(node) == node_document) { - if (node.first_child()) + if (node->first_child) { - node = node.first_child(); + node = node->first_child; continue; } } @@ -3635,17 +3638,17 @@ PUGI__NS_BEGIN // continue to the next node while (node != root) { - if (node.next_sibling()) + if (node->next_sibling) { - node = node.next_sibling(); + node = node->next_sibling; break; } - node = node.parent(); + node = node->parent; depth--; // write closing node - if (node.type() == node_element) + if (PUGI__NODETYPE(node) == node_element) { if (indent_length) text_output_indent(writer, indent, indent_length, depth); @@ -5383,7 +5386,7 @@ namespace pugi impl::xml_buffered_writer buffered_writer(writer, encoding); - impl::node_output(buffered_writer, *this, indent, flags, depth); + impl::node_output(buffered_writer, _root, indent, flags, depth); } #ifndef PUGIXML_NO_STL @@ -6074,7 +6077,7 @@ namespace pugi if (!(flags & format_raw)) buffered_writer.write('\n'); } - impl::node_output(buffered_writer, *this, indent, flags, 0); + impl::node_output(buffered_writer, _root, indent, flags, 0); } #ifndef PUGIXML_NO_STL -- cgit v1.2.3