698 lines
21 KiB
C++
698 lines
21 KiB
C++
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/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/base/stringencode.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include "webrtc/base/basictypes.h"
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#include "webrtc/base/checks.h"
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#include "webrtc/base/stringutils.h"
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namespace rtc {
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/////////////////////////////////////////////////////////////////////////////
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// String Encoding Utilities
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/////////////////////////////////////////////////////////////////////////////
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size_t escape(char * buffer, size_t buflen,
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const char * source, size_t srclen,
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const char * illegal, char escape) {
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RTC_DCHECK(buffer); // TODO(grunell): estimate output size
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if (buflen <= 0)
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return 0;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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char ch = source[srcpos++];
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if ((ch == escape) || ::strchr(illegal, ch)) {
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if (bufpos + 2 >= buflen)
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break;
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buffer[bufpos++] = escape;
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}
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buffer[bufpos++] = ch;
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}
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buffer[bufpos] = '\0';
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return bufpos;
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}
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size_t unescape(char * buffer, size_t buflen,
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const char * source, size_t srclen,
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char escape) {
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RTC_DCHECK(buffer); // TODO(grunell): estimate output size
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if (buflen <= 0)
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return 0;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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char ch = source[srcpos++];
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if ((ch == escape) && (srcpos < srclen)) {
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ch = source[srcpos++];
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}
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buffer[bufpos++] = ch;
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}
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buffer[bufpos] = '\0';
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return bufpos;
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}
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size_t encode(char * buffer, size_t buflen,
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const char * source, size_t srclen,
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const char * illegal, char escape) {
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RTC_DCHECK(buffer); // TODO(grunell): estimate output size
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if (buflen <= 0)
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return 0;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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char ch = source[srcpos++];
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if ((ch != escape) && !::strchr(illegal, ch)) {
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buffer[bufpos++] = ch;
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} else if (bufpos + 3 >= buflen) {
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break;
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} else {
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buffer[bufpos+0] = escape;
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buffer[bufpos+1] = hex_encode((static_cast<unsigned char>(ch) >> 4) & 0xF);
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buffer[bufpos+2] = hex_encode((static_cast<unsigned char>(ch) ) & 0xF);
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bufpos += 3;
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}
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}
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buffer[bufpos] = '\0';
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return bufpos;
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}
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size_t decode(char * buffer, size_t buflen,
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const char * source, size_t srclen,
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char escape) {
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if (buflen <= 0)
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return 0;
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unsigned char h1, h2;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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char ch = source[srcpos++];
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if ((ch == escape)
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&& (srcpos + 1 < srclen)
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&& hex_decode(source[srcpos], &h1)
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&& hex_decode(source[srcpos+1], &h2)) {
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buffer[bufpos++] = (h1 << 4) | h2;
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srcpos += 2;
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} else {
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buffer[bufpos++] = ch;
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}
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}
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buffer[bufpos] = '\0';
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return bufpos;
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}
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const char* unsafe_filename_characters() {
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// It might be better to have a single specification which is the union of
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// all operating systems, unless one system is overly restrictive.
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#if defined(WEBRTC_WIN)
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return "\\/:*?\"<>|";
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#else // !WEBRTC_WIN
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// TODO(grunell): Should this never be reached?
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RTC_DCHECK(false);
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return "";
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#endif // !WEBRTC_WIN
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}
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const unsigned char URL_UNSAFE = 0x1; // 0-33 "#$%&+,/:;<=>?@[\]^`{|} 127
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const unsigned char XML_UNSAFE = 0x2; // "&'<>
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const unsigned char HTML_UNSAFE = 0x2; // "&'<>
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// ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 6 5 7 8 9 : ; < = > ?
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//@ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _
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//` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~
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const unsigned char ASCII_CLASS[128] = {
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,0,3,1,1,1,3,2,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,1,3,1,3,1,
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1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,
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1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,1,
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};
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size_t url_encode(char * buffer, size_t buflen,
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const char * source, size_t srclen) {
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if (NULL == buffer)
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return srclen * 3 + 1;
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if (buflen <= 0)
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return 0;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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unsigned char ch = source[srcpos++];
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if ((ch < 128) && (ASCII_CLASS[ch] & URL_UNSAFE)) {
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if (bufpos + 3 >= buflen) {
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break;
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}
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buffer[bufpos+0] = '%';
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buffer[bufpos+1] = hex_encode((ch >> 4) & 0xF);
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buffer[bufpos+2] = hex_encode((ch ) & 0xF);
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bufpos += 3;
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} else {
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buffer[bufpos++] = ch;
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}
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}
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buffer[bufpos] = '\0';
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return bufpos;
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}
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size_t url_decode(char * buffer, size_t buflen,
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const char * source, size_t srclen) {
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if (NULL == buffer)
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return srclen + 1;
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if (buflen <= 0)
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return 0;
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unsigned char h1, h2;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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unsigned char ch = source[srcpos++];
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if (ch == '+') {
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buffer[bufpos++] = ' ';
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} else if ((ch == '%')
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&& (srcpos + 1 < srclen)
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&& hex_decode(source[srcpos], &h1)
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&& hex_decode(source[srcpos+1], &h2))
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{
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buffer[bufpos++] = (h1 << 4) | h2;
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srcpos += 2;
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} else {
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buffer[bufpos++] = ch;
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}
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}
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buffer[bufpos] = '\0';
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return bufpos;
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}
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size_t utf8_decode(const char* source, size_t srclen, unsigned long* value) {
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const unsigned char* s = reinterpret_cast<const unsigned char*>(source);
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if ((s[0] & 0x80) == 0x00) { // Check s[0] == 0xxxxxxx
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*value = s[0];
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return 1;
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}
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if ((srclen < 2) || ((s[1] & 0xC0) != 0x80)) { // Check s[1] != 10xxxxxx
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return 0;
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}
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// Accumulate the trailer byte values in value16, and combine it with the
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// relevant bits from s[0], once we've determined the sequence length.
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unsigned long value16 = (s[1] & 0x3F);
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if ((s[0] & 0xE0) == 0xC0) { // Check s[0] == 110xxxxx
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*value = ((s[0] & 0x1F) << 6) | value16;
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return 2;
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}
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if ((srclen < 3) || ((s[2] & 0xC0) != 0x80)) { // Check s[2] != 10xxxxxx
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return 0;
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}
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value16 = (value16 << 6) | (s[2] & 0x3F);
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if ((s[0] & 0xF0) == 0xE0) { // Check s[0] == 1110xxxx
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*value = ((s[0] & 0x0F) << 12) | value16;
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return 3;
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}
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if ((srclen < 4) || ((s[3] & 0xC0) != 0x80)) { // Check s[3] != 10xxxxxx
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return 0;
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}
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value16 = (value16 << 6) | (s[3] & 0x3F);
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if ((s[0] & 0xF8) == 0xF0) { // Check s[0] == 11110xxx
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*value = ((s[0] & 0x07) << 18) | value16;
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return 4;
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}
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return 0;
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}
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size_t utf8_encode(char* buffer, size_t buflen, unsigned long value) {
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if ((value <= 0x7F) && (buflen >= 1)) {
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buffer[0] = static_cast<unsigned char>(value);
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return 1;
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}
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if ((value <= 0x7FF) && (buflen >= 2)) {
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buffer[0] = 0xC0 | static_cast<unsigned char>(value >> 6);
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buffer[1] = 0x80 | static_cast<unsigned char>(value & 0x3F);
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return 2;
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}
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if ((value <= 0xFFFF) && (buflen >= 3)) {
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buffer[0] = 0xE0 | static_cast<unsigned char>(value >> 12);
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buffer[1] = 0x80 | static_cast<unsigned char>((value >> 6) & 0x3F);
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buffer[2] = 0x80 | static_cast<unsigned char>(value & 0x3F);
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return 3;
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}
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if ((value <= 0x1FFFFF) && (buflen >= 4)) {
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buffer[0] = 0xF0 | static_cast<unsigned char>(value >> 18);
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buffer[1] = 0x80 | static_cast<unsigned char>((value >> 12) & 0x3F);
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buffer[2] = 0x80 | static_cast<unsigned char>((value >> 6) & 0x3F);
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buffer[3] = 0x80 | static_cast<unsigned char>(value & 0x3F);
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return 4;
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}
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return 0;
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}
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size_t html_encode(char * buffer, size_t buflen,
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const char * source, size_t srclen) {
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RTC_DCHECK(buffer); // TODO(grunell): estimate output size
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if (buflen <= 0)
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return 0;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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unsigned char ch = source[srcpos];
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if (ch < 128) {
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srcpos += 1;
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if (ASCII_CLASS[ch] & HTML_UNSAFE) {
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const char * escseq = 0;
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size_t esclen = 0;
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switch (ch) {
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case '<': escseq = "<"; esclen = 4; break;
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case '>': escseq = ">"; esclen = 4; break;
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case '\'': escseq = "'"; esclen = 5; break;
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case '\"': escseq = """; esclen = 6; break;
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case '&': escseq = "&"; esclen = 5; break;
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default: RTC_DCHECK(false);
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}
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if (bufpos + esclen >= buflen) {
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break;
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}
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memcpy(buffer + bufpos, escseq, esclen);
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bufpos += esclen;
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} else {
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buffer[bufpos++] = ch;
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}
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} else {
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// Largest value is 0x1FFFFF => � (10 characters)
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const size_t kEscseqSize = 11;
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char escseq[kEscseqSize];
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unsigned long val;
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if (size_t vallen = utf8_decode(&source[srcpos], srclen - srcpos, &val)) {
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srcpos += vallen;
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} else {
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// Not a valid utf8 sequence, just use the raw character.
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val = static_cast<unsigned char>(source[srcpos++]);
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}
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size_t esclen = sprintfn(escseq, kEscseqSize, "&#%lu;", val);
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if (bufpos + esclen >= buflen) {
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break;
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}
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memcpy(buffer + bufpos, escseq, esclen);
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bufpos += esclen;
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}
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}
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buffer[bufpos] = '\0';
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return bufpos;
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}
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size_t html_decode(char * buffer, size_t buflen,
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const char * source, size_t srclen) {
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RTC_DCHECK(buffer); // TODO(grunell): estimate output size
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return xml_decode(buffer, buflen, source, srclen);
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}
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size_t xml_encode(char * buffer, size_t buflen,
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const char * source, size_t srclen) {
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RTC_DCHECK(buffer); // TODO(grunell): estimate output size
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if (buflen <= 0)
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return 0;
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size_t srcpos = 0, bufpos = 0;
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while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
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unsigned char ch = source[srcpos++];
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if ((ch < 128) && (ASCII_CLASS[ch] & XML_UNSAFE)) {
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const char * escseq = 0;
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size_t esclen = 0;
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switch (ch) {
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case '<': escseq = "<"; esclen = 4; break;
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case '>': escseq = ">"; esclen = 4; break;
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case '\'': escseq = "'"; esclen = 6; break;
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case '\"': escseq = """; esclen = 6; break;
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case '&': escseq = "&"; esclen = 5; break;
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default: RTC_DCHECK(false);
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}
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if (bufpos + esclen >= buflen) {
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|
|
break;
|
||
|
|
}
|
||
|
|
memcpy(buffer + bufpos, escseq, esclen);
|
||
|
|
bufpos += esclen;
|
||
|
|
} else {
|
||
|
|
buffer[bufpos++] = ch;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
buffer[bufpos] = '\0';
|
||
|
|
return bufpos;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t xml_decode(char * buffer, size_t buflen,
|
||
|
|
const char * source, size_t srclen) {
|
||
|
|
RTC_DCHECK(buffer); // TODO(grunell): estimate output size
|
||
|
|
if (buflen <= 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
size_t srcpos = 0, bufpos = 0;
|
||
|
|
while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
|
||
|
|
unsigned char ch = source[srcpos++];
|
||
|
|
if (ch != '&') {
|
||
|
|
buffer[bufpos++] = ch;
|
||
|
|
} else if ((srcpos + 2 < srclen)
|
||
|
|
&& (memcmp(source + srcpos, "lt;", 3) == 0)) {
|
||
|
|
buffer[bufpos++] = '<';
|
||
|
|
srcpos += 3;
|
||
|
|
} else if ((srcpos + 2 < srclen)
|
||
|
|
&& (memcmp(source + srcpos, "gt;", 3) == 0)) {
|
||
|
|
buffer[bufpos++] = '>';
|
||
|
|
srcpos += 3;
|
||
|
|
} else if ((srcpos + 4 < srclen)
|
||
|
|
&& (memcmp(source + srcpos, "apos;", 5) == 0)) {
|
||
|
|
buffer[bufpos++] = '\'';
|
||
|
|
srcpos += 5;
|
||
|
|
} else if ((srcpos + 4 < srclen)
|
||
|
|
&& (memcmp(source + srcpos, "quot;", 5) == 0)) {
|
||
|
|
buffer[bufpos++] = '\"';
|
||
|
|
srcpos += 5;
|
||
|
|
} else if ((srcpos + 3 < srclen)
|
||
|
|
&& (memcmp(source + srcpos, "amp;", 4) == 0)) {
|
||
|
|
buffer[bufpos++] = '&';
|
||
|
|
srcpos += 4;
|
||
|
|
} else if ((srcpos < srclen) && (source[srcpos] == '#')) {
|
||
|
|
int int_base = 10;
|
||
|
|
if ((srcpos + 1 < srclen) && (source[srcpos+1] == 'x')) {
|
||
|
|
int_base = 16;
|
||
|
|
srcpos += 1;
|
||
|
|
}
|
||
|
|
char * ptr;
|
||
|
|
// TODO(grunell): Fix hack (ptr may go past end of data)
|
||
|
|
unsigned long val = strtoul(source + srcpos + 1, &ptr, int_base);
|
||
|
|
if ((static_cast<size_t>(ptr - source) < srclen) && (*ptr == ';')) {
|
||
|
|
srcpos = ptr - source + 1;
|
||
|
|
} else {
|
||
|
|
// Not a valid escape sequence.
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (size_t esclen = utf8_encode(buffer + bufpos, buflen - bufpos, val)) {
|
||
|
|
bufpos += esclen;
|
||
|
|
} else {
|
||
|
|
// Not enough room to encode the character, or illegal character
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// Unrecognized escape sequence.
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
buffer[bufpos] = '\0';
|
||
|
|
return bufpos;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const char HEX[] = "0123456789abcdef";
|
||
|
|
|
||
|
|
char hex_encode(unsigned char val) {
|
||
|
|
RTC_DCHECK_LT(val, 16);
|
||
|
|
return (val < 16) ? HEX[val] : '!';
|
||
|
|
}
|
||
|
|
|
||
|
|
bool hex_decode(char ch, unsigned char* val) {
|
||
|
|
if ((ch >= '0') && (ch <= '9')) {
|
||
|
|
*val = ch - '0';
|
||
|
|
} else if ((ch >= 'A') && (ch <= 'Z')) {
|
||
|
|
*val = (ch - 'A') + 10;
|
||
|
|
} else if ((ch >= 'a') && (ch <= 'z')) {
|
||
|
|
*val = (ch - 'a') + 10;
|
||
|
|
} else {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t hex_encode(char* buffer, size_t buflen,
|
||
|
|
const char* csource, size_t srclen) {
|
||
|
|
return hex_encode_with_delimiter(buffer, buflen, csource, srclen, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t hex_encode_with_delimiter(char* buffer, size_t buflen,
|
||
|
|
const char* csource, size_t srclen,
|
||
|
|
char delimiter) {
|
||
|
|
RTC_DCHECK(buffer); // TODO(grunell): estimate output size
|
||
|
|
if (buflen == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
// Init and check bounds.
|
||
|
|
const unsigned char* bsource =
|
||
|
|
reinterpret_cast<const unsigned char*>(csource);
|
||
|
|
size_t srcpos = 0, bufpos = 0;
|
||
|
|
size_t needed = delimiter ? (srclen * 3) : (srclen * 2 + 1);
|
||
|
|
if (buflen < needed)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
while (srcpos < srclen) {
|
||
|
|
unsigned char ch = bsource[srcpos++];
|
||
|
|
buffer[bufpos ] = hex_encode((ch >> 4) & 0xF);
|
||
|
|
buffer[bufpos+1] = hex_encode((ch ) & 0xF);
|
||
|
|
bufpos += 2;
|
||
|
|
|
||
|
|
// Don't write a delimiter after the last byte.
|
||
|
|
if (delimiter && (srcpos < srclen)) {
|
||
|
|
buffer[bufpos] = delimiter;
|
||
|
|
++bufpos;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Null terminate.
|
||
|
|
buffer[bufpos] = '\0';
|
||
|
|
return bufpos;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string hex_encode(const std::string& str) {
|
||
|
|
return hex_encode(str.c_str(), str.size());
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string hex_encode(const char* source, size_t srclen) {
|
||
|
|
return hex_encode_with_delimiter(source, srclen, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string hex_encode_with_delimiter(const char* source, size_t srclen,
|
||
|
|
char delimiter) {
|
||
|
|
const size_t kBufferSize = srclen * 3;
|
||
|
|
char* buffer = STACK_ARRAY(char, kBufferSize);
|
||
|
|
size_t length = hex_encode_with_delimiter(buffer, kBufferSize,
|
||
|
|
source, srclen, delimiter);
|
||
|
|
RTC_DCHECK(srclen == 0 || length > 0);
|
||
|
|
return std::string(buffer, length);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t hex_decode(char * cbuffer, size_t buflen,
|
||
|
|
const char * source, size_t srclen) {
|
||
|
|
return hex_decode_with_delimiter(cbuffer, buflen, source, srclen, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t hex_decode_with_delimiter(char* cbuffer, size_t buflen,
|
||
|
|
const char* source, size_t srclen,
|
||
|
|
char delimiter) {
|
||
|
|
RTC_DCHECK(cbuffer); // TODO(grunell): estimate output size
|
||
|
|
if (buflen == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
// Init and bounds check.
|
||
|
|
unsigned char* bbuffer = reinterpret_cast<unsigned char*>(cbuffer);
|
||
|
|
size_t srcpos = 0, bufpos = 0;
|
||
|
|
size_t needed = (delimiter) ? (srclen + 1) / 3 : srclen / 2;
|
||
|
|
if (buflen < needed)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
while (srcpos < srclen) {
|
||
|
|
if ((srclen - srcpos) < 2) {
|
||
|
|
// This means we have an odd number of bytes.
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned char h1, h2;
|
||
|
|
if (!hex_decode(source[srcpos], &h1) ||
|
||
|
|
!hex_decode(source[srcpos + 1], &h2))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
bbuffer[bufpos++] = (h1 << 4) | h2;
|
||
|
|
srcpos += 2;
|
||
|
|
|
||
|
|
// Remove the delimiter if needed.
|
||
|
|
if (delimiter && (srclen - srcpos) > 1) {
|
||
|
|
if (source[srcpos] != delimiter)
|
||
|
|
return 0;
|
||
|
|
++srcpos;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bufpos;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t hex_decode(char* buffer, size_t buflen, const std::string& source) {
|
||
|
|
return hex_decode_with_delimiter(buffer, buflen, source, 0);
|
||
|
|
}
|
||
|
|
size_t hex_decode_with_delimiter(char* buffer, size_t buflen,
|
||
|
|
const std::string& source, char delimiter) {
|
||
|
|
return hex_decode_with_delimiter(buffer, buflen,
|
||
|
|
source.c_str(), source.length(), delimiter);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t transform(std::string& value, size_t maxlen, const std::string& source,
|
||
|
|
Transform t) {
|
||
|
|
char* buffer = STACK_ARRAY(char, maxlen + 1);
|
||
|
|
size_t length = t(buffer, maxlen + 1, source.data(), source.length());
|
||
|
|
value.assign(buffer, length);
|
||
|
|
return length;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string s_transform(const std::string& source, Transform t) {
|
||
|
|
// Ask transformation function to approximate the destination size (returns upper bound)
|
||
|
|
size_t maxlen = t(NULL, 0, source.data(), source.length());
|
||
|
|
char * buffer = STACK_ARRAY(char, maxlen);
|
||
|
|
size_t len = t(buffer, maxlen, source.data(), source.length());
|
||
|
|
std::string result(buffer, len);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t tokenize(const std::string& source, char delimiter,
|
||
|
|
std::vector<std::string>* fields) {
|
||
|
|
fields->clear();
|
||
|
|
size_t last = 0;
|
||
|
|
for (size_t i = 0; i < source.length(); ++i) {
|
||
|
|
if (source[i] == delimiter) {
|
||
|
|
if (i != last) {
|
||
|
|
fields->push_back(source.substr(last, i - last));
|
||
|
|
}
|
||
|
|
last = i + 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (last != source.length()) {
|
||
|
|
fields->push_back(source.substr(last, source.length() - last));
|
||
|
|
}
|
||
|
|
return fields->size();
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t tokenize_with_empty_tokens(const std::string& source,
|
||
|
|
char delimiter,
|
||
|
|
std::vector<std::string>* fields) {
|
||
|
|
fields->clear();
|
||
|
|
size_t last = 0;
|
||
|
|
for (size_t i = 0; i < source.length(); ++i) {
|
||
|
|
if (source[i] == delimiter) {
|
||
|
|
fields->push_back(source.substr(last, i - last));
|
||
|
|
last = i + 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
fields->push_back(source.substr(last, source.length() - last));
|
||
|
|
return fields->size();
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t tokenize_append(const std::string& source, char delimiter,
|
||
|
|
std::vector<std::string>* fields) {
|
||
|
|
if (!fields) return 0;
|
||
|
|
|
||
|
|
std::vector<std::string> new_fields;
|
||
|
|
tokenize(source, delimiter, &new_fields);
|
||
|
|
fields->insert(fields->end(), new_fields.begin(), new_fields.end());
|
||
|
|
return fields->size();
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t tokenize(const std::string& source, char delimiter, char start_mark,
|
||
|
|
char end_mark, std::vector<std::string>* fields) {
|
||
|
|
if (!fields) return 0;
|
||
|
|
fields->clear();
|
||
|
|
|
||
|
|
std::string remain_source = source;
|
||
|
|
while (!remain_source.empty()) {
|
||
|
|
size_t start_pos = remain_source.find(start_mark);
|
||
|
|
if (std::string::npos == start_pos) break;
|
||
|
|
std::string pre_mark;
|
||
|
|
if (start_pos > 0) {
|
||
|
|
pre_mark = remain_source.substr(0, start_pos - 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
++start_pos;
|
||
|
|
size_t end_pos = remain_source.find(end_mark, start_pos);
|
||
|
|
if (std::string::npos == end_pos) break;
|
||
|
|
|
||
|
|
// We have found the matching marks. First tokenize the pre-mask. Then add
|
||
|
|
// the marked part as a single field. Finally, loop back for the post-mark.
|
||
|
|
tokenize_append(pre_mark, delimiter, fields);
|
||
|
|
fields->push_back(remain_source.substr(start_pos, end_pos - start_pos));
|
||
|
|
remain_source = remain_source.substr(end_pos + 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
return tokenize_append(remain_source, delimiter, fields);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool tokenize_first(const std::string& source,
|
||
|
|
const char delimiter,
|
||
|
|
std::string* token,
|
||
|
|
std::string* rest) {
|
||
|
|
// Find the first delimiter
|
||
|
|
size_t left_pos = source.find(delimiter);
|
||
|
|
if (left_pos == std::string::npos) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Look for additional occurrances of delimiter.
|
||
|
|
size_t right_pos = left_pos + 1;
|
||
|
|
while (source[right_pos] == delimiter) {
|
||
|
|
right_pos++;
|
||
|
|
}
|
||
|
|
|
||
|
|
*token = source.substr(0, left_pos);
|
||
|
|
*rest = source.substr(right_pos);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t split(const std::string& source, char delimiter,
|
||
|
|
std::vector<std::string>* fields) {
|
||
|
|
RTC_DCHECK(fields);
|
||
|
|
fields->clear();
|
||
|
|
size_t last = 0;
|
||
|
|
for (size_t i = 0; i < source.length(); ++i) {
|
||
|
|
if (source[i] == delimiter) {
|
||
|
|
fields->push_back(source.substr(last, i - last));
|
||
|
|
last = i + 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
fields->push_back(source.substr(last, source.length() - last));
|
||
|
|
return fields->size();
|
||
|
|
}
|
||
|
|
|
||
|
|
char make_char_safe_for_filename(char c) {
|
||
|
|
if (c < 32)
|
||
|
|
return '_';
|
||
|
|
|
||
|
|
switch (c) {
|
||
|
|
case '<':
|
||
|
|
case '>':
|
||
|
|
case ':':
|
||
|
|
case '"':
|
||
|
|
case '/':
|
||
|
|
case '\\':
|
||
|
|
case '|':
|
||
|
|
case '*':
|
||
|
|
case '?':
|
||
|
|
return '_';
|
||
|
|
|
||
|
|
default:
|
||
|
|
return c;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
void sprintf(std::string& value, size_t maxlen, const char * format, ...) {
|
||
|
|
char * buffer = STACK_ARRAY(char, maxlen + 1);
|
||
|
|
va_list args;
|
||
|
|
va_start(args, format);
|
||
|
|
value.assign(buffer, vsprintfn(buffer, maxlen + 1, format, args));
|
||
|
|
va_end(args);
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
} // namespace rtc
|