| /* |
| * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "webrtc/base/stringencode.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "webrtc/base/checks.h" |
| #include "webrtc/base/stringutils.h" |
| |
| namespace rtc { |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // String Encoding Utilities |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| size_t escape(char * buffer, size_t buflen, |
| const char * source, size_t srclen, |
| const char * illegal, char escape) { |
| 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)) { |
| char ch = source[srcpos++]; |
| if ((ch == escape) || ::strchr(illegal, ch)) { |
| if (bufpos + 2 >= buflen) |
| break; |
| buffer[bufpos++] = escape; |
| } |
| buffer[bufpos++] = ch; |
| } |
| |
| buffer[bufpos] = '\0'; |
| return bufpos; |
| } |
| |
| size_t unescape(char * buffer, size_t buflen, |
| const char * source, size_t srclen, |
| char escape) { |
| 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)) { |
| char ch = source[srcpos++]; |
| if ((ch == escape) && (srcpos < srclen)) { |
| ch = source[srcpos++]; |
| } |
| buffer[bufpos++] = ch; |
| } |
| buffer[bufpos] = '\0'; |
| return bufpos; |
| } |
| |
| size_t encode(char * buffer, size_t buflen, |
| const char * source, size_t srclen, |
| const char * illegal, char escape) { |
| 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)) { |
| char ch = source[srcpos++]; |
| if ((ch != escape) && !::strchr(illegal, ch)) { |
| buffer[bufpos++] = ch; |
| } else if (bufpos + 3 >= buflen) { |
| break; |
| } else { |
| buffer[bufpos+0] = escape; |
| buffer[bufpos+1] = hex_encode((static_cast<unsigned char>(ch) >> 4) & 0xF); |
| buffer[bufpos+2] = hex_encode((static_cast<unsigned char>(ch) ) & 0xF); |
| bufpos += 3; |
| } |
| } |
| buffer[bufpos] = '\0'; |
| return bufpos; |
| } |
| |
| size_t decode(char * buffer, size_t buflen, |
| const char * source, size_t srclen, |
| char escape) { |
| if (buflen <= 0) |
| return 0; |
| |
| unsigned char h1, h2; |
| size_t srcpos = 0, bufpos = 0; |
| while ((srcpos < srclen) && (bufpos + 1 < buflen)) { |
| char ch = source[srcpos++]; |
| if ((ch == escape) |
| && (srcpos + 1 < srclen) |
| && hex_decode(source[srcpos], &h1) |
| && hex_decode(source[srcpos+1], &h2)) { |
| buffer[bufpos++] = (h1 << 4) | h2; |
| srcpos += 2; |
| } else { |
| buffer[bufpos++] = ch; |
| } |
| } |
| buffer[bufpos] = '\0'; |
| return bufpos; |
| } |
| |
| const char* unsafe_filename_characters() { |
| // It might be better to have a single specification which is the union of |
| // all operating systems, unless one system is overly restrictive. |
| #if defined(WEBRTC_WIN) |
| return "\\/:*?\"<>|"; |
| #else // !WEBRTC_WIN |
| // TODO(grunell): Should this never be reached? |
| RTC_NOTREACHED(); |
| return ""; |
| #endif // !WEBRTC_WIN |
| } |
| |
| const unsigned char URL_UNSAFE = 0x1; // 0-33 "#$%&+,/:;<=>?@[\]^`{|} 127 |
| const unsigned char XML_UNSAFE = 0x2; // "&'<> |
| const unsigned char HTML_UNSAFE = 0x2; // "&'<> |
| |
| // ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 6 5 7 8 9 : ; < = > ? |
| //@ 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 [ \ ] ^ _ |
| //` 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 { | } ~ |
| |
| const unsigned char ASCII_CLASS[128] = { |
| 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, |
| 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, |
| 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, |
| 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, |
| }; |
| |
| size_t url_encode(char * buffer, size_t buflen, |
| const char * source, size_t srclen) { |
| if (nullptr == buffer) |
| return srclen * 3 + 1; |
| if (buflen <= 0) |
| return 0; |
| |
| size_t srcpos = 0, bufpos = 0; |
| while ((srcpos < srclen) && (bufpos + 1 < buflen)) { |
| unsigned char ch = source[srcpos++]; |
| if ((ch < 128) && (ASCII_CLASS[ch] & URL_UNSAFE)) { |
| if (bufpos + 3 >= buflen) { |
| break; |
| } |
| buffer[bufpos+0] = '%'; |
| buffer[bufpos+1] = hex_encode((ch >> 4) & 0xF); |
| buffer[bufpos+2] = hex_encode((ch ) & 0xF); |
| bufpos += 3; |
| } else { |
| buffer[bufpos++] = ch; |
| } |
| } |
| buffer[bufpos] = '\0'; |
| return bufpos; |
| } |
| |
| size_t url_decode(char * buffer, size_t buflen, |
| const char * source, size_t srclen) { |
| if (nullptr == buffer) |
| return srclen + 1; |
| if (buflen <= 0) |
| return 0; |
| |
| unsigned char h1, h2; |
| size_t srcpos = 0, bufpos = 0; |
| while ((srcpos < srclen) && (bufpos + 1 < buflen)) { |
| unsigned char ch = source[srcpos++]; |
| if (ch == '+') { |
| buffer[bufpos++] = ' '; |
| } else if ((ch == '%') |
| && (srcpos + 1 < srclen) |
| && hex_decode(source[srcpos], &h1) |
| && hex_decode(source[srcpos+1], &h2)) |
| { |
| buffer[bufpos++] = (h1 << 4) | h2; |
| srcpos += 2; |
| } else { |
| buffer[bufpos++] = ch; |
| } |
| } |
| buffer[bufpos] = '\0'; |
| return bufpos; |
| } |
| |
| size_t utf8_decode(const char* source, size_t srclen, unsigned long* value) { |
| const unsigned char* s = reinterpret_cast<const unsigned char*>(source); |
| if ((s[0] & 0x80) == 0x00) { // Check s[0] == 0xxxxxxx |
| *value = s[0]; |
| return 1; |
| } |
| if ((srclen < 2) || ((s[1] & 0xC0) != 0x80)) { // Check s[1] != 10xxxxxx |
| return 0; |
| } |
| // Accumulate the trailer byte values in value16, and combine it with the |
| // relevant bits from s[0], once we've determined the sequence length. |
| unsigned long value16 = (s[1] & 0x3F); |
| if ((s[0] & 0xE0) == 0xC0) { // Check s[0] == 110xxxxx |
| *value = ((s[0] & 0x1F) << 6) | value16; |
| return 2; |
| } |
| if ((srclen < 3) || ((s[2] & 0xC0) != 0x80)) { // Check s[2] != 10xxxxxx |
| return 0; |
| } |
| value16 = (value16 << 6) | (s[2] & 0x3F); |
| if ((s[0] & 0xF0) == 0xE0) { // Check s[0] == 1110xxxx |
| *value = ((s[0] & 0x0F) << 12) | value16; |
| return 3; |
| } |
| if ((srclen < 4) || ((s[3] & 0xC0) != 0x80)) { // Check s[3] != 10xxxxxx |
| return 0; |
| } |
| value16 = (value16 << 6) | (s[3] & 0x3F); |
| if ((s[0] & 0xF8) == 0xF0) { // Check s[0] == 11110xxx |
| *value = ((s[0] & 0x07) << 18) | value16; |
| return 4; |
| } |
| return 0; |
| } |
| |
| size_t utf8_encode(char* buffer, size_t buflen, unsigned long value) { |
| if ((value <= 0x7F) && (buflen >= 1)) { |
| buffer[0] = static_cast<unsigned char>(value); |
| return 1; |
| } |
| if ((value <= 0x7FF) && (buflen >= 2)) { |
| buffer[0] = 0xC0 | static_cast<unsigned char>(value >> 6); |
| buffer[1] = 0x80 | static_cast<unsigned char>(value & 0x3F); |
| return 2; |
| } |
| if ((value <= 0xFFFF) && (buflen >= 3)) { |
| buffer[0] = 0xE0 | static_cast<unsigned char>(value >> 12); |
| buffer[1] = 0x80 | static_cast<unsigned char>((value >> 6) & 0x3F); |
| buffer[2] = 0x80 | static_cast<unsigned char>(value & 0x3F); |
| return 3; |
| } |
| if ((value <= 0x1FFFFF) && (buflen >= 4)) { |
| buffer[0] = 0xF0 | static_cast<unsigned char>(value >> 18); |
| buffer[1] = 0x80 | static_cast<unsigned char>((value >> 12) & 0x3F); |
| buffer[2] = 0x80 | static_cast<unsigned char>((value >> 6) & 0x3F); |
| buffer[3] = 0x80 | static_cast<unsigned char>(value & 0x3F); |
| return 4; |
| } |
| return 0; |
| } |
| |
| size_t html_encode(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 < 128) { |
| srcpos += 1; |
| if (ASCII_CLASS[ch] & HTML_UNSAFE) { |
| const char * escseq = 0; |
| size_t esclen = 0; |
| switch (ch) { |
| case '<': escseq = "<"; esclen = 4; break; |
| case '>': escseq = ">"; esclen = 4; break; |
| case '\'': escseq = "'"; esclen = 5; break; |
| case '\"': escseq = """; esclen = 6; break; |
| case '&': escseq = "&"; esclen = 5; break; |
| default: RTC_NOTREACHED(); |
| } |
| if (bufpos + esclen >= buflen) { |
| break; |
| } |
| memcpy(buffer + bufpos, escseq, esclen); |
| bufpos += esclen; |
| } else { |
| buffer[bufpos++] = ch; |
| } |
| } else { |
| // Largest value is 0x1FFFFF => � (10 characters) |
| const size_t kEscseqSize = 11; |
| char escseq[kEscseqSize]; |
| unsigned long val; |
| if (size_t vallen = utf8_decode(&source[srcpos], srclen - srcpos, &val)) { |
| srcpos += vallen; |
| } else { |
| // Not a valid utf8 sequence, just use the raw character. |
| val = static_cast<unsigned char>(source[srcpos++]); |
| } |
| size_t esclen = sprintfn(escseq, kEscseqSize, "&#%lu;", val); |
| if (bufpos + esclen >= buflen) { |
| break; |
| } |
| memcpy(buffer + bufpos, escseq, esclen); |
| bufpos += esclen; |
| } |
| } |
| buffer[bufpos] = '\0'; |
| return bufpos; |
| } |
| |
| size_t html_decode(char * buffer, size_t buflen, |
| const char * source, size_t srclen) { |
| RTC_DCHECK(buffer); // TODO(grunell): estimate output size |
| return xml_decode(buffer, buflen, source, srclen); |
| } |
| |
| size_t xml_encode(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 < 128) && (ASCII_CLASS[ch] & XML_UNSAFE)) { |
| const char * escseq = 0; |
| size_t esclen = 0; |
| switch (ch) { |
| case '<': escseq = "<"; esclen = 4; break; |
| case '>': escseq = ">"; esclen = 4; break; |
| case '\'': escseq = "'"; esclen = 6; break; |
| case '\"': escseq = """; esclen = 6; break; |
| case '&': escseq = "&"; esclen = 5; break; |
| default: RTC_NOTREACHED(); |
| } |
| if (bufpos + esclen >= buflen) { |
| 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(nullptr, 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 |
