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// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Author: jdtang@google.com (Jonathan Tang)
#include "gumbo.h"
#include <assert.h>
#include <ctype.h>
#include <string.h>
const char* kGumboTagNames[] = {
#include "tag_strings.h"
"", // TAG_UNKNOWN
"", // TAG_LAST
};
static const unsigned char kGumboTagSizes[] = {
#include "tag_sizes.h"
0, // TAG_UNKNOWN
0, // TAG_LAST
};
const char* gumbo_normalized_tagname(GumboTag tag) {
assert(tag <= GUMBO_TAG_LAST);
return kGumboTagNames[tag];
}
void gumbo_tag_from_original_text(GumboStringPiece* text) {
if (text->data == NULL) {
return;
}
assert(text->length >= 2);
assert(text->data[0] == '<');
assert(text->data[text->length - 1] == '>');
if (text->data[1] == '/') {
// End tag.
assert(text->length >= 3);
text->data += 2; // Move past </
text->length -= 3;
} else {
// Start tag.
text->data += 1; // Move past <
text->length -= 2;
// explicitly looking for whitespace or other illegal tag characters.
// see https://html.spec.whatwg.org/multipage/syntax.html#tag-name-state
for (const char* c = text->data; c != text->data + text->length; ++c) {
if (*c == ' ' || *c == '\t' || *c == '\n' || *c == '\f' || *c == '/') {
text->length = c - text->data;
break;
}
}
}
}
static int case_memcmp(const char* s1, const char* s2, unsigned int n) {
while (n--) {
unsigned char c1 = tolower(*s1++);
unsigned char c2 = tolower(*s2++);
if (c1 != c2) return (int) c1 - (int) c2;
}
return 0;
}
#include "tag_gperf.h"
#define TAG_MAP_SIZE (sizeof(kGumboTagMap) / sizeof(kGumboTagMap[0]))
GumboTag gumbo_tagn_enum(const char* tagname, unsigned int length) {
if (length) {
unsigned int key = tag_hash(tagname, length);
if (key < TAG_MAP_SIZE) {
GumboTag tag = kGumboTagMap[key];
if (length == kGumboTagSizes[(int) tag] &&
!case_memcmp(tagname, kGumboTagNames[(int) tag], length))
return tag;
}
}
return GUMBO_TAG_UNKNOWN;
}
GumboTag gumbo_tag_enum(const char* tagname) {
return gumbo_tagn_enum(tagname, strlen(tagname));
}
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