tg2sip/webrtc_dsp/rtc_base/stringutils.cc

88 lines
2.2 KiB
C++

/*
* 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 "rtc_base/stringutils.h"
namespace rtc {
size_t strcpyn(char* buffer,
size_t buflen,
const char* source,
size_t srclen /* = SIZE_UNKNOWN */) {
if (buflen <= 0)
return 0;
if (srclen == SIZE_UNKNOWN) {
srclen = strlen(source);
}
if (srclen >= buflen) {
srclen = buflen - 1;
}
memcpy(buffer, source, srclen);
buffer[srclen] = 0;
return srclen;
}
void replace_substrs(const char* search,
size_t search_len,
const char* replace,
size_t replace_len,
std::string* s) {
size_t pos = 0;
while ((pos = s->find(search, pos, search_len)) != std::string::npos) {
s->replace(pos, search_len, replace, replace_len);
pos += replace_len;
}
}
bool starts_with(const char* s1, const char* s2) {
return strncmp(s1, s2, strlen(s2)) == 0;
}
bool ends_with(const char* s1, const char* s2) {
size_t s1_length = strlen(s1);
size_t s2_length = strlen(s2);
if (s2_length > s1_length) {
return false;
}
const char* start = s1 + (s1_length - s2_length);
return strncmp(start, s2, s2_length) == 0;
}
static const char kWhitespace[] = " \n\r\t";
std::string string_trim(const std::string& s) {
std::string::size_type first = s.find_first_not_of(kWhitespace);
std::string::size_type last = s.find_last_not_of(kWhitespace);
if (first == std::string::npos || last == std::string::npos) {
return std::string("");
}
return s.substr(first, last - first + 1);
}
std::string ToHex(const int i) {
char buffer[50];
snprintf(buffer, sizeof(buffer), "%x", i);
return std::string(buffer);
}
std::string LeftPad(char padding, unsigned length, std::string s) {
if (s.length() >= length)
return s;
return std::string(length - s.length(), padding) + s;
}
} // namespace rtc